/* roulang page: index */
:root{
  --ink:#0F1A16;
  --lime:#C6F24E;
  --paper:#F6F4EF;
  --graphite:#5C6A63;
  --hairline:#D9DED6;
  --mist:#E9EDE6;
  --body:#2A332E;
  --light:#F2F5EE;
  --light-sub:#A9B4AB;
  --r-sm:12px;
  --r-card:16px;
  --r-lg:20px;
  --sh-1:0 1px 2px rgba(15,26,22,.06);
  --sh-2:0 10px 30px -12px rgba(15,26,22,.18);
  --sh-3:0 18px 48px -20px rgba(15,26,22,.28);
  --header-h:68px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--paper);
  color:var(--body);
  font-size:16px;
  line-height:1.85;
  -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}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.18;font-weight:700;letter-spacing:-.01em}
p{margin:0}
input,textarea{font:inherit}
::selection{background:var(--lime);color:var(--ink)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

.mono{font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;font-variant-numeric:tabular-nums}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.92);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--hairline);box-shadow:0 1px 0 rgba(15,26,22,.02)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--header-h)}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;flex:0 0 auto}
.logo-mark{font-weight:800;color:var(--ink);letter-spacing:-.01em}
.logo-sep{display:inline-block;width:1px;height:18px;background:var(--hairline);transition:background .25s var(--ease)}
.logo:hover .logo-sep{background:var(--lime)}
.logo-sub{font-weight:400;color:var(--graphite)}
.nav-desktop{display:none;align-items:center;gap:26px}
@media (min-width:1024px){.nav-desktop{display:flex}}
.nav-link{position:relative;padding:6px 2px;font-size:15px;font-weight:500;color:var(--body);white-space:nowrap;transition:color .2s var(--ease)}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:0;height:2px;background:var(--lime);border-radius:2px;
  transition:width .24s var(--ease);
}
.nav-link:hover::after{width:100%}
.nav-link.is-active::after{width:60%}
.nav-link:hover{color:var(--ink)}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:38px;padding:0 18px;border-radius:999px;
  border:1px solid var(--ink);color:var(--ink);
  font-size:14px;font-weight:600;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-cta:hover{background:var(--ink);color:var(--lime);transform:translateY(-2px);box-shadow:var(--sh-2)}
.nav-cta:active{transform:translateY(0)}
.nav-cta:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.menu-btn{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--hairline);
  background:#fff;padding:0 12px;
}
@media (min-width:1024px){.menu-btn{display:none}}
.menu-btn span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s var(--ease),opacity .2s var(--ease)}
.menu-btn span:nth-child(1){width:20px}
.menu-btn span:nth-child(2){width:14px}
.menu-btn span:nth-child(3){width:20px}
.menu-btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:90;
  background:rgba(15,26,22,.42);
  opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s;
}
.drawer.is-open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:84%;max-width:360px;
  background:var(--paper);border-left:1px solid var(--hairline);
  transform:translateX(100%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:20px;
}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;gap:10px;padding-bottom:20px;border-bottom:1px solid var(--hairline)}
.drawer-close{
  margin-left:auto;width:40px;height:40px;border-radius:12px;border:1px solid var(--hairline);
  font-size:22px;line-height:1;color:var(--graphite);background:#fff;
}
.drawer-close:hover{color:var(--ink);border-color:var(--ink)}
.drawer-nav{display:flex;flex-direction:column;padding:16px 0;gap:2px}
.drawer-nav a{
  padding:14px 8px;border-radius:10px;font-size:16px;color:var(--body);
  border-bottom:1px solid rgba(217,222,214,.6);
}
.drawer-nav a.is-active{color:var(--ink);font-weight:600;box-shadow:inset 3px 0 0 var(--lime);padding-left:14px}
.drawer-nav a:hover{background:var(--mist)}
.drawer-cta{margin-top:auto;width:100%}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--lime);color:var(--ink);border:1px solid var(--lime)}
.btn-primary:hover{background:#d3fa63;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-ghost{border:1px solid var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:var(--lime);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-on-dark{border:1px solid rgba(242,245,238,.4);color:var(--light);background:transparent}
.btn-on-dark:hover{background:rgba(242,245,238,.14);transform:translateY(-2px)}
.btn-sm{min-height:42px;padding:0 20px;font-size:14px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--ink)}
.hero-media{position:absolute;inset:0}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.62;transform:scale(1.03);animation:heroZoom 1.4s var(--ease) forwards}
@media (prefers-reduced-motion:reduce){.hero-media img{animation:none;transform:none}}
@keyframes heroZoom{to{transform:scale(1)}}
.hero-scrim{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(15,26,22,.94) 0%,rgba(15,26,22,.78) 42%,rgba(15,26,22,.34) 78%,rgba(15,26,22,.15) 100%);
}
.hero-inner{position:relative;padding:88px 0 72px}
@media (min-width:1024px){.hero-inner{padding:132px 0 108px}}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.06em;color:var(--lime);font-weight:600;
}
.hero-eyebrow::before{content:"";width:22px;height:1px;background:var(--lime)}
.hero h1{
  margin-top:18px;color:var(--light);
  font-size:clamp(34px,6vw,68px);line-height:1.12;letter-spacing:-.02em;font-weight:700;
  max-width:16em;
}
.hero-lead{
  margin-top:22px;max-width:38em;color:#D6DED3;font-size:clamp(15px,1.5vw,17px);line-height:1.9;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-note{margin-top:16px;font-size:13.5px;color:var(--light-sub);letter-spacing:.01em}
.hero-badges{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  margin-top:44px;padding-top:24px;border-top:1px solid rgba(242,245,238,.16);
  font-size:13.5px;color:#C4CEC1;
}
.hero-badges li{display:inline-flex;align-items:center;gap:10px}
.hero-badges li+li::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--lime);opacity:.8;margin-right:4px}

/* ---------- 锚点条 ---------- */
.anchorbar{
  position:sticky;top:var(--header-h);z-index:50;
  background:rgba(246,244,239,.9);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.anchorbar.is-stuck{border-bottom-color:var(--hairline);box-shadow:0 6px 20px -18px rgba(15,26,22,.5)}
.anchorbar-inner{display:flex;gap:10px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none}
.anchorbar-inner::-webkit-scrollbar{display:none}
.anchor-chip{
  flex:0 0 auto;display:inline-flex;align-items:center;height:38px;padding:0 18px;
  border-radius:999px;background:var(--mist);color:var(--graphite);
  font-size:14px;font-weight:600;letter-spacing:.02em;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.anchor-chip:hover{transform:translateY(-2px);color:var(--ink)}
.anchor-chip.is-active{background:var(--ink);color:var(--light);transform:none}

/* ---------- 通用区块 ---------- */
.section{padding:72px 0}
@media (min-width:768px){.section{padding:96px 0}}
@media (min-width:1024px){.section{padding:112px 0}}
.sec-head{max-width:720px}
.sec-kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--graphite);text-transform:uppercase;
}
.sec-kicker::before{content:"";width:18px;height:2px;background:var(--lime)}
.sec-title{margin-top:16px;font-size:clamp(26px,3.4vw,40px);letter-spacing:-.01em}
.sec-desc{margin-top:16px;color:var(--graphite);font-size:16px;line-height:1.9}
[id]{scroll-margin-top:140px}

/* ---------- 卖点 ---------- */
.feature-row{display:grid;gap:32px;align-items:center}
@media (min-width:1024px){
  .feature-row{grid-template-columns:repeat(12,1fr);gap:48px}
  .feature-copy{grid-column:span 5}
  .feature-media{grid-column:6 / span 7}
  .feature-row.is-flip .feature-copy{grid-column:8 / span 5;order:2}
  .feature-row.is-flip .feature-media{grid-column:1 / span 6;order:1}
}
.feature-row+.feature-row{margin-top:72px}
@media (min-width:1024px){.feature-row+.feature-row{margin-top:104px}}
.feature-num{
  font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
  font-size:clamp(48px,7vw,80px);line-height:1;font-weight:700;
  color:var(--lime);-webkit-text-stroke:0;
  letter-spacing:-.04em;
}
.feature-title{margin-top:14px;font-size:clamp(22px,2.4vw,28px);font-weight:700}
.feature-text{margin-top:14px;color:var(--graphite);font-size:16px;line-height:1.9;max-width:32em}
.feature-list{margin-top:22px;display:grid;gap:10px}
.feature-list li{display:flex;gap:10px;font-size:15px;color:var(--body)}
.feature-list li::before{content:"";flex:0 0 auto;width:16px;height:16px;margin-top:7px;border-radius:50%;background:var(--mist);box-shadow:inset 0 0 0 5px var(--lime)}
.media-frame{
  position:relative;border-radius:var(--r-lg);overflow:hidden;background:var(--mist);
  border:1px solid var(--hairline);box-shadow:var(--sh-1);
}
.media-frame img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s var(--ease)}
.media-frame:hover img{transform:scale(1.02)}
.media-tag{
  position:absolute;left:16px;bottom:16px;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;
  background:rgba(15,26,22,.86);color:var(--light);font-size:13px;font-weight:600;
  backdrop-filter:blur(6px);
}
.media-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--lime)}

/* ---------- 演示 ---------- */
.demo-wrap{display:grid;gap:32px;margin-top:48px}
@media (min-width:1024px){.demo-wrap{grid-template-columns:5fr 7fr;gap:56px;align-items:center}}
.demo-steps{display:grid;gap:10px}
.step-btn{
  text-align:left;width:100%;padding:18px 20px;border-radius:var(--r-card);
  border:1px solid var(--hairline);background:#fff;
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.step-btn:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.step-btn .step-idx{
  font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
  font-size:13px;color:var(--graphite);letter-spacing:.08em;
}
.step-btn .step-title{display:block;margin-top:6px;font-size:17px;font-weight:600;color:var(--ink)}
.step-btn .step-text{display:block;margin-top:6px;font-size:14px;color:var(--graphite);line-height:1.75}
.step-btn.is-active{border-color:var(--ink);background:var(--ink);box-shadow:var(--sh-3)}
.step-btn.is-active .step-idx{color:var(--lime)}
.step-btn.is-active .step-title{color:var(--light)}
.step-btn.is-active .step-text{color:var(--light-sub)}
.step-btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.device{
  border-radius:var(--r-lg);overflow:hidden;background:#fff;
  border:1px solid var(--hairline);box-shadow:var(--sh-3);
}
.device-bar{display:flex;align-items:center;gap:6px;padding:12px 16px;border-bottom:1px solid var(--hairline);background:var(--mist)}
.device-bar i{width:10px;height:10px;border-radius:50%;background:#C9D1C7;display:block}
.device-bar i:first-child{background:var(--lime)}
.device-bar span{margin-left:10px;font-size:12px;color:var(--graphite);letter-spacing:.04em}
.device-img{position:relative}
.device-img img{width:100%;aspect-ratio:16/10;object-fit:cover}
.device-float{
  position:absolute;right:16px;top:16px;
  padding:10px 14px;border-radius:12px;background:rgba(255,255,255,.94);
  border:1px solid var(--hairline);box-shadow:var(--sh-2);
  font-size:13px;font-weight:600;color:var(--ink);
}

/* ---------- 证据 ---------- */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--hairline);border:1px solid var(--hairline);border-radius:var(--r-card);overflow:hidden;margin-top:48px}
@media (min-width:768px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat{background:#fff;padding:28px 24px}
.stat-num{
  font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
  font-size:clamp(30px,4vw,44px);font-weight:700;color:var(--ink);line-height:1;letter-spacing:-.03em;
}
.stat-suffix{font-size:16px;font-weight:600;color:var(--ink);margin-left:4px}
.stat-label{display:block;margin-top:12px;font-size:13.5px;color:var(--graphite);letter-spacing:.02em}

.quotes{display:grid;gap:22px;margin-top:56px}
@media (min-width:768px){
  .quotes{grid-template-columns:1fr 1fr;gap:28px;align-items:start}
  .quote:nth-child(2){margin-top:44px}
}
.quote{
  background:#fff;border:1px solid var(--hairline);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.quote:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(198,242,78,.7)}
.quote p{font-size:15.5px;color:var(--body);line-height:1.9}
.quote-foot{display:flex;align-items:center;gap:12px;margin-top:20px;padding-top:18px;border-top:1px solid var(--hairline)}
.avatar{
  width:40px;height:40px;border-radius:50%;background:var(--ink);color:var(--lime);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;flex:0 0 auto;
}
.quote-name{font-size:14px;font-weight:600;color:var(--ink)}
.quote-meta{font-size:12.5px;color:var(--graphite)}

.partners{margin-top:56px;padding-top:28px;border-top:1px solid var(--hairline)}
.partners-title{font-size:13px;letter-spacing:.1em;color:var(--graphite);font-weight:600}
.partners-row{display:flex;flex-wrap:wrap;gap:14px 34px;margin-top:18px}
.partners-row span{
  font-size:15px;font-weight:600;color:#98A39A;letter-spacing:.02em;
  transition:color .2s var(--ease);
}
.partners-row span:hover{color:var(--ink)}

/* ---------- 资讯列表 ---------- */
.news-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px}
.news-all{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--ink)}
.news-all::after{content:"→";transition:transform .2s var(--ease)}
.news-all:hover::after{transform:translateX(4px)}
.news-list{margin-top:40px;border-top:1px solid var(--hairline)}
.news-item{
  display:grid;gap:10px;
  padding:24px 0;border-bottom:1px solid var(--hairline);
  transition:background .2s var(--ease);
}
@media (min-width:768px){
  .news-item{grid-template-columns:140px 1fr auto;gap:28px;align-items:start;padding:26px 0}
}
.news-item:hover{background:rgba(233,237,230,.45)}
.news-item:hover .news-title{box-shadow:inset 0 -1px 0 var(--ink)}
.news-date{font-size:13.5px;color:var(--graphite);letter-spacing:.03em}
.news-title{font-size:19px;font-weight:600;color:var(--ink);display:inline;transition:box-shadow .2s var(--ease)}
.news-summary{margin-top:8px;font-size:14.5px;color:var(--graphite);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;max-width:60em}
.news-arrow{font-size:18px;color:var(--graphite);transition:transform .2s var(--ease),color .2s var(--ease)}
.news-item:hover .news-arrow{transform:translateX(4px);color:var(--ink)}
.news-thumb{
  display:none;width:100%;aspect-ratio:16/10;border-radius:var(--r-sm);overflow:hidden;
  background:var(--mist);border:1px solid var(--hairline);
}
@media (min-width:768px){.news-thumb{display:block}}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--mist);color:var(--graphite);font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.tag-lime{background:rgba(198,242,78,.34);color:var(--ink)}
.empty-state{
  margin-top:40px;min-height:240px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  border:1px dashed var(--hairline);border-radius:var(--r-card);background:rgba(255,255,255,.6);
  padding:40px 24px;text-align:center;
}
.empty-icon{width:44px;height:44px;border-radius:50%;border:1.5px solid var(--graphite);display:flex;align-items:center;justify-content:center;color:var(--graphite);font-size:20px}
.empty-state p{color:var(--graphite);font-size:15px}

/* ---------- 方案 ---------- */
.plan-grid{display:grid;gap:22px;margin-top:48px}
@media (min-width:1024px){
  .plan-grid{grid-template-columns:repeat(12,1fr);gap:24px;align-items:stretch}
  .plan:nth-child(1){grid-column:span 3}
  .plan:nth-child(2){grid-column:span 5}
  .plan:nth-child(3){grid-column:span 4}
}
.plan{
  position:relative;background:#fff;border:1px solid var(--hairline);border-radius:var(--r-card);
  padding:28px;display:flex;flex-direction:column;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.plan:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--ink)}
.plan.is-featured{border-color:var(--lime);box-shadow:var(--sh-2)}
.plan-badge{
  position:absolute;top:-12px;left:28px;
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--lime);color:var(--ink);font-size:12.5px;font-weight:700;letter-spacing:.03em;
}
.plan-name{font-size:14px;font-weight:700;letter-spacing:.08em;color:var(--graphite)}
.plan-price{margin-top:14px;display:flex;align-items:baseline;gap:6px}
.plan-price strong{font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;font-size:34px;font-weight:700;color:var(--ink);letter-spacing:-.03em;line-height:1}
.plan-price em{font-style:normal;font-size:13.5px;color:var(--graphite)}
.plan-desc{margin-top:14px;font-size:14.5px;color:var(--graphite);line-height:1.85}
.plan-list{margin-top:22px;display:grid;gap:12px;padding-top:20px;border-top:1px solid var(--hairline)}
.plan-list li{display:flex;gap:10px;font-size:14.5px;color:var(--body);line-height:1.7}
.plan-list li::before{
  content:"✓";flex:0 0 auto;width:18px;height:18px;margin-top:5px;border-radius:50%;
  background:var(--mist);color:var(--ink);font-size:11px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.plan .btn{margin-top:26px;width:100%}
.plan-note{margin-top:18px;font-size:13px;color:var(--graphite)}

/* ---------- FAQ ---------- */
.faq{margin-top:44px;border-top:1px solid var(--hairline)}
.faq-item{border-bottom:1px solid var(--hairline)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;gap:18px;
  padding:24px 0;text-align:left;
  transition:padding-left .2s var(--ease);
}
.faq-q:hover{padding-left:8px}
.faq-q:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.faq-idx{
  font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
  font-size:14px;color:var(--graphite);letter-spacing:.06em;flex:0 0 auto;margin-top:4px;
}
.faq-text{flex:1;font-size:18px;font-weight:600;color:var(--ink);line-height:1.6}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:1px solid var(--hairline);
  display:flex;align-items:center;justify-content:center;color:var(--ink);font-size:16px;
  transition:transform .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--lime);border-color:var(--lime)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a-inner{
  padding:0 0 26px 42px;position:relative;font-size:15.5px;color:var(--graphite);line-height:1.9;
}
.faq-a-inner::before{
  content:"";position:absolute;left:0;top:2px;width:3px;height:calc(100% - 30px);
  background:var(--lime);border-radius:3px;
}
.faq-item.is-open .faq-a{max-height:420px}

/* ---------- 尾部 CTA ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--ink);border-radius:0}
.cta-band-media{position:absolute;inset:0}
.cta-band-media img{width:100%;height:100%;object-fit:cover;opacity:.3}
.cta-band-scrim{position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,26,22,.94),rgba(15,26,22,.6))}
.cta-band-inner{position:relative;padding:72px 0;text-align:center}
@media (min-width:768px){.cta-band-inner{padding:96px 0}}
.cta-band h2{color:var(--light);font-size:clamp(26px,3.6vw,42px)}
.cta-band p{margin-top:16px;color:#C4CEC1;font-size:16px;max-width:44em;margin-left:auto;margin-right:auto}
.cta-band-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:32px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#CBD4C9;padding:64px 0 0;border-top:1px solid rgba(242,245,238,.1)}
.footer-grid{display:grid;gap:36px;padding-bottom:48px}
@media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:40px}}
@media (min-width:1024px){.footer-grid{grid-template-columns:4fr 3fr 3fr 3fr;gap:48px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:19px}
.footer-brand .logo-mark{color:var(--light)}
.footer-brand .logo-sep{background:rgba(242,245,238,.28)}
.footer-brand .logo-sub{color:#A9B4AB}
.footer-desc{margin-top:18px;font-size:14.5px;line-height:1.9;color:#A9B4AB;max-width:32em}
.footer-col h3{color:var(--light);font-size:14px;letter-spacing:.08em;font-weight:700}
.footer-links{margin-top:18px;display:grid;gap:12px}
.footer-links a{font-size:14.5px;color:#A9B4AB;transition:color .2s var(--ease),padding-left .2s var(--ease)}
.footer-links a:hover{color:var(--lime);padding-left:4px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  padding:22px 0;border-top:1px solid rgba(242,245,238,.12);
  font-size:13.5px;color:#8E998F;
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:20px;bottom:20px;z-index:70;
  display:flex;align-items:center;gap:14px;
  padding:12px 14px 12px 20px;border-radius:999px;
  background:rgba(15,26,22,.94);color:var(--light);
  box-shadow:var(--sh-3);backdrop-filter:blur(8px);
  opacity:0;visibility:hidden;transform:translateY(16px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  max-width:calc(100vw - 40px);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta p{font-size:13.5px;color:#C4CEC1;white-space:nowrap}
.float-cta .btn{min-height:40px;padding:0 18px;font-size:13.5px}
.float-close{
  width:28px;height:28px;border-radius:50%;color:#A9B4AB;font-size:16px;line-height:1;
  display:flex;align-items:center;justify-content:center;transition:background .2s var(--ease),color .2s var(--ease);
}
.float-close:hover{background:rgba(242,245,238,.14);color:var(--light)}
@media (max-width:640px){
  .float-cta{
    left:12px;right:12px;bottom:12px;border-radius:16px;
    padding:12px 12px 12px 16px;justify-content:space-between;
    padding-bottom:calc(12px + env(safe-area-inset-bottom,0px));
  }
  .float-cta p{white-space:normal;font-size:13px}
}

/* ---------- 滚动动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* roulang page: article */
:root{
  --bg:#F6F4EF;
  --ink:#0F1A16;
  --ink-soft:#1B2A24;
  --accent:#C6F24E;
  --accent-dim:rgba(198,242,78,.35);
  --muted:#5C6A63;
  --text:#2A332E;
  --line:#D9DED6;
  --mist:#E9EDE6;
  --white:#FFFFFF;
  --radius-s:12px;
  --radius-m:16px;
  --radius-l:20px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(15,26,22,.06);
  --shadow-2:0 10px 30px -12px rgba(15,26,22,.18);
  --shadow-3:0 18px 48px -20px rgba(15,26,22,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
img{max-width:100%;height:auto;border:0}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent);color:var(--ink)}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:768px){.container{padding-left:32px;padding-right:32px}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.93);
  backdrop-filter:saturate(140%) blur(10px);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(15,26,22,.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;line-height:1;white-space:nowrap}
.logo-mark{font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.logo-sep{width:1px;height:17px;background:var(--line);transition:background-color .25s var(--ease)}
.logo-sub{font-weight:500;color:var(--muted)}
.logo:hover .logo-sep{background:var(--accent)}
.logo:hover .logo-sub{color:var(--ink)}
.nav-desktop{display:none;align-items:center;gap:4px}
@media(min-width:1024px){.nav-desktop{display:flex}}
.nav-link{position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--muted);border-radius:var(--radius-pill);transition:color .2s var(--ease)}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:3px;height:2px;
  background:var(--accent);border-radius:2px;transition:left .22s var(--ease),right .22s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{left:22%;right:22%}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{left:22%;right:22%}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  margin-left:10px;padding:9px 20px;font-size:15px;font-weight:600;line-height:1.2;
  color:var(--ink);border:1px solid var(--ink);border-radius:var(--radius-pill);
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-cta:hover{background:var(--ink);color:#F2F5EE;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.nav-cta:active{transform:translateY(0)}
.menu-btn{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;border-radius:var(--radius-s);
}
.menu-btn span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s var(--ease),opacity .2s var(--ease)}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(min-width:1024px){.menu-btn{display:none}}
.drawer{
  position:fixed;top:0;right:0;z-index:90;
  width:min(320px,86vw);height:100%;padding:24px 22px 32px;
  background:var(--white);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;gap:6px;box-shadow:var(--shadow-3);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-title{font-size:14px;letter-spacing:.08em;color:var(--muted);font-weight:600}
.drawer-close{width:40px;height:40px;border-radius:var(--radius-s);font-size:20px;color:var(--muted);line-height:1}
.drawer-close:hover{background:var(--mist);color:var(--ink)}
.drawer-link{padding:13px 14px;border-radius:var(--radius-s);font-size:16px;color:var(--ink);border:1px solid transparent}
.drawer-link:hover{background:var(--mist)}
.drawer-link.is-active{background:var(--mist);font-weight:600;border-color:var(--line)}
.drawer-cta{margin-top:auto;display:flex;align-items:center;justify-content:center;padding:14px 18px;border-radius:var(--radius-pill);background:var(--ink);color:var(--accent);font-weight:600}
.drawer-backdrop{position:fixed;inset:0;z-index:80;background:rgba(15,26,22,.42);opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s}
.drawer-backdrop.is-open{opacity:1;visibility:visible}

/* ---------- breadcrumb / article head ---------- */
.page-head{
  position:relative;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(233,237,230,.55) 0%,rgba(246,244,239,0) 100%);
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(var(--ink) 1px,transparent 1px),linear-gradient(90deg,var(--ink) 1px,transparent 1px);
  background-size:64px 64px;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:22px 0 0;font-size:13.5px;color:var(--muted);position:relative;z-index:1}
.crumb a{color:var(--muted);border-bottom:1px solid transparent}
.crumb a:hover{color:var(--ink);border-bottom-color:var(--accent)}
.crumb .sep{color:var(--line)}
.crumb .now{max-width:46ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink);font-weight:600}
.article-head{padding:26px 0 46px;position:relative;z-index:1}
.article-head h1{
  font-size:clamp(26px,3.6vw,44px);
  line-height:1.25;letter-spacing:-.015em;font-weight:700;color:var(--ink);
  max-width:22ch;
}
.head-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:20px;font-size:13.5px;color:var(--muted)}
.tag-pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--radius-pill);background:var(--mist);
  border:1px solid var(--line);font-size:13px;font-weight:600;color:var(--muted);letter-spacing:.02em;
}
.tag-pill.accent{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-item .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.meta-num{font-family:var(--mono);font-size:13px;letter-spacing:.02em;color:var(--ink)}

/* ---------- layout ---------- */
.article-wrap{padding:56px 0 8px}
.article-grid{display:grid;grid-template-columns:1fr;gap:40px}
@media(min-width:1024px){
  .article-grid{grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:56px;align-items:start}
}
.article-main{min-width:0}

/* ---------- article body ---------- */
.article-body{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  padding:30px 22px 34px;
  box-shadow:var(--shadow-1);
  font-size:16.5px;
  line-height:1.9;
  color:var(--text);
  overflow-wrap:break-word;
}
@media(min-width:768px){.article-body{padding:52px 56px 58px}}
.article-body > * + *{margin-top:1.25em}
.article-body p{margin:0}
.article-body h2{
  position:relative;margin-top:2.1em;padding-left:16px;
  font-size:clamp(21px,2.3vw,27px);font-weight:700;line-height:1.4;letter-spacing:-.01em;color:var(--ink);
}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.2em;width:3px;border-radius:3px;background:var(--accent)}
.article-body h3{
  margin-top:1.8em;padding-top:1em;border-top:1px solid var(--line);
  font-size:19px;font-weight:600;line-height:1.5;color:var(--ink);
}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink)}
.article-body a{color:var(--ink);border-bottom:1px solid var(--accent);padding-bottom:1px}
.article-body a:hover{background:var(--accent-dim)}
.article-body strong{color:var(--ink);font-weight:600}
.article-body ul,.article-body ol{margin:1.1em 0;padding-left:0;display:flex;flex-direction:column;gap:.55em}
.article-body ul li,.article-body ol li{position:relative;padding-left:26px}
.article-body ul li::before{
  content:"";position:absolute;left:6px;top:.72em;width:7px;height:7px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 0 1px rgba(15,26,22,.12);
}
.article-body ol{counter-reset:olc}
.article-body ol li{counter-increment:olc}
.article-body ol li::before{
  content:counter(olc,decimal-leading-zero);
  position:absolute;left:0;top:.05em;font-family:var(--mono);font-size:13px;font-weight:600;color:var(--muted);
}
.article-body blockquote{
  margin:1.6em 0;padding:20px 22px;background:var(--mist);
  border-left:3px solid var(--accent);border-radius:0 var(--radius-s) var(--radius-s) 0;
  color:var(--ink-soft);font-size:16px;
}
.article-body blockquote p + p{margin-top:.7em}
.article-body figure{margin:1.8em 0}
.article-body img{border-radius:var(--radius-m);width:100%}
.article-body figcaption{margin-top:10px;font-size:13.5px;color:var(--muted);text-align:center}
.article-body img{display:block}
.article-body code{
  font-family:var(--mono);font-size:.9em;background:var(--mist);
  padding:2px 6px;border-radius:6px;color:var(--ink);
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}
.article-body table{width:100%;border-collapse:collapse;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{background:var(--mist);font-weight:600;color:var(--ink)}

/* empty state */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:280px;text-align:center;gap:12px;padding:40px 20px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-l);
}
.empty-icon{width:54px;height:54px;border-radius:50%;border:1.5px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--muted)}
.empty-state h2{font-size:20px;font-weight:700;color:var(--ink);padding-left:0;border:0}
.empty-state h2::before{display:none}
.empty-state p{color:var(--muted);font-size:15px;max-width:44ch}

/* ---------- sidebar ---------- */
.side-col{display:none}
@media(min-width:1024px){.side-col{display:block}}
.side-sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:22px;box-shadow:var(--shadow-1);
}
.side-title{
  font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--muted);
  padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:14px;
}
#tocNav{display:flex;flex-direction:column;gap:2px;max-height:52vh;overflow:auto}
#tocNav a{
  display:block;padding:9px 10px 9px 12px;font-size:14px;color:var(--muted);
  border-left:2px solid transparent;border-radius:0 8px 8px 0;line-height:1.6;
}
#tocNav a:hover{background:var(--mist);color:var(--ink)}
#tocNav a.is-current{border-left-color:var(--accent);color:var(--ink);font-weight:600;background:var(--mist)}
#tocNav a.lv3{padding-left:26px;font-size:13.5px}
#tocNav .toc-empty{font-size:14px;color:var(--muted);padding:4px 2px}
.side-links{display:flex;flex-direction:column;gap:10px}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 13px;border:1px solid var(--line);border-radius:var(--radius-s);
  font-size:14px;color:var(--ink);transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.side-links a:hover{transform:translateY(-2px);border-color:var(--accent-dim);box-shadow:var(--shadow-2)}
.side-links span{color:var(--muted);font-family:var(--mono);font-size:13px}
.side-note{font-size:13.5px;color:var(--muted);line-height:1.8}

/* ---------- tags / share ---------- */
.after-body{margin-top:36px;display:flex;flex-direction:column;gap:24px}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.tag-row .label{font-size:13.5px;color:var(--muted);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;padding:7px 15px;border-radius:var(--radius-pill);
  background:var(--mist);border:1px solid var(--line);font-size:13.5px;color:var(--muted);
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.tag:hover{color:var(--ink);border-color:var(--accent);background:rgba(198,242,78,.22)}
.notice{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;
  background:var(--mist);border:1px solid var(--line);border-radius:var(--radius-m);
  font-size:14px;color:var(--muted);line-height:1.8;
}
.notice strong{color:var(--ink)}
.notice i{
  flex:none;width:26px;height:26px;border-radius:50%;background:var(--ink);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-style:normal;font-weight:700;
}

/* ---------- prev next ---------- */
.pager{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:768px){.pager{grid-template-columns:1fr 1fr}}
.pager-card{
  display:flex;flex-direction:column;gap:8px;padding:22px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-m);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.pager-card:hover{transform:translateY(-2px);border-color:var(--accent-dim);box-shadow:var(--shadow-2)}
.pager-card .k{font-size:12.5px;letter-spacing:.1em;color:var(--muted);font-weight:600}
.pager-card .t{font-size:17px;font-weight:600;color:var(--ink);line-height:1.5}
.pager-card.next{text-align:right;align-items:flex-end}

/* ---------- related ---------- */
.section{padding:72px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:34px}
.section-head h2{font-size:clamp(23px,2.7vw,32px);font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.section-head p{margin-top:8px;font-size:14.5px;color:var(--muted)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--ink);border-bottom:2px solid var(--accent);padding-bottom:2px}
.link-more:hover{color:var(--muted)}
.card-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;background:var(--white);
  border:1px solid var(--line);border-radius:var(--radius-m);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.post-card:hover{transform:translateY(-2px);border-color:var(--accent-dim);box-shadow:var(--shadow-2)}
.post-thumb{position:relative;aspect-ratio:16/10;background:var(--mist);overflow:hidden}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:17.5px;font-weight:600;line-height:1.5;color:var(--ink)}
.post-card:hover .post-body h3{text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:3px}
.post-body p{font-size:14px;color:var(--muted);line-height:1.7}
.post-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted)}
.post-foot time{font-family:var(--mono)}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink);color:#F2F5EE;
  border-radius:24px;padding:56px 26px;
}
@media(min-width:768px){.cta-band{padding:72px 64px}}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  opacity:.2;mix-blend-mode:luminosity;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(15,26,22,.94) 0%,rgba(15,26,22,.72) 55%,rgba(15,26,22,.42) 100%);
}
.cta-inner{position:relative;z-index:1;max-width:660px}
.cta-inner h2{font-size:clamp(24px,3.2vw,38px);font-weight:700;line-height:1.25;letter-spacing:-.01em}
.cta-inner p{margin-top:14px;font-size:15.5px;color:#A9B4AB;line-height:1.85}
.cta-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--radius-pill);font-size:15.5px;font-weight:600;line-height:1.2;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--accent);color:var(--ink);border:1px solid var(--accent)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px -14px rgba(198,242,78,.7);background:#D3F76E;border-color:#D3F76E}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:#F2F5EE;border:1px solid rgba(242,245,238,.42)}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent)}
.btn-ghost:active{transform:translateY(0)}
.btn-dark{background:var(--ink);color:#F2F5EE;border:1px solid var(--ink)}
.btn-dark:hover{transform:translateY(-2px);color:var(--accent);box-shadow:var(--shadow-2)}
.section-divider{height:1px;background:var(--line);margin-top:72px}

/* ---------- floating cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:none;align-items:center;gap:14px;
  padding:12px 12px 12px 20px;border-radius:var(--radius-pill);
  background:rgba(15,26,22,.9);color:#F2F5EE;box-shadow:var(--shadow-3);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
@media(min-width:1024px){.float-cta{display:flex}}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta p{font-size:14px;color:#D7DED7;white-space:nowrap}
.float-cta .go{
  display:inline-flex;align-items:center;padding:9px 18px;border-radius:var(--radius-pill);
  background:var(--accent);color:var(--ink);font-size:14px;font-weight:700;white-space:nowrap;
  transition:transform .2s var(--ease),background-color .2s var(--ease);
}
.float-cta .go:hover{transform:translateY(-1px);background:#D3F76E}
.float-cta .close{
  width:30px;height:30px;border-radius:50%;color:#A9B4AB;font-size:15px;line-height:1;
  display:inline-flex;align-items:center;justify-content:center;transition:background-color .2s var(--ease),color .2s var(--ease);
}
.float-cta .close:hover{background:rgba(242,245,238,.14);color:#F2F5EE}
.float-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(15,26,22,.96);color:#F2F5EE;box-shadow:0 -8px 24px -16px rgba(15,26,22,.6);
  opacity:0;transform:translateY(100%);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
@media(min-width:1024px){.float-bar{display:none}}
.float-bar.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-bar span{font-size:13px;color:#A9B4AB}
.float-bar a{
  display:inline-flex;align-items:center;padding:10px 20px;border-radius:var(--radius-pill);
  background:var(--accent);color:var(--ink);font-size:14px;font-weight:700;min-height:44px;
}
.back-top{
  position:fixed;left:24px;bottom:24px;z-index:65;width:46px;height:46px;border-radius:50%;
  background:var(--white);border:1px solid var(--line);color:var(--ink);box-shadow:var(--shadow-1);
  display:none;align-items:center;justify-content:center;font-size:16px;
  opacity:0;transform:translateY(10px);transition:opacity .24s var(--ease),transform .24s var(--ease),box-shadow .2s var(--ease);
}
@media(min-width:1024px){.back-top{display:flex}}
.back-top.is-visible{opacity:1;transform:translateY(0)}
.back-top:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#F2F5EE;margin-top:88px;padding:64px 0 26px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media(min-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;line-height:1}
.footer-brand .logo-mark{color:#F2F5EE}
.footer-brand .logo-sep{background:rgba(242,245,238,.28)}
.footer-brand .logo-sub{color:#A9B4AB}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.9;color:#A9B4AB;max-width:44ch}
.footer-col h3{font-size:13.5px;font-weight:700;letter-spacing:.1em;color:#F2F5EE;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14.5px;color:#A9B4AB;transition:color .2s var(--ease)}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:46px;padding-top:22px;border-top:1px solid rgba(242,245,238,.14);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;color:#8C978F;
}
.footer-bottom span:last-child{font-family:var(--mono);letter-spacing:.04em}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .45s var(--ease),transform .45s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .post-card:hover,.pager-card:hover,.side-links a:hover,.btn:hover{transform:none}
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
}

/* roulang page: category1 */
:root{
  --bg:#F6F4EF;
  --white:#FFFFFF;
  --ink:#0F1A16;
  --lime:#C6F24E;
  --graphite:#5C6A63;
  --line:#D9DED6;
  --mist:#E9EDE6;
  --text:#2A332E;
  --dark-text:#F2F5EE;
  --dark-sub:#A9B4AB;
  --r-pill:999px;
  --r-card:16px;
  --r-lg:20px;
  --shadow-1:0 1px 2px rgba(15,26,22,.06);
  --shadow-2:0 10px 30px -12px rgba(15,26,22,.18);
  --shadow-3:0 18px 48px -20px rgba(15,26,22,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:68px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);}
p{margin:0;}
ul,ol{margin:0;}
.mono{font-family:ui-monospace,"SFMono-Regular",Consolas,"Courier New",monospace;}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px -18px rgba(15,26,22,.4);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:var(--header-h);}
.logo{display:inline-flex;align-items:center;gap:9px;font-size:19px;letter-spacing:-.01em;color:var(--ink);}
.logo-mark{font-weight:800;}
.logo-sub{font-weight:500;color:var(--graphite);}
.logo-sep{display:inline-block;width:1px;height:16px;background:var(--line);transition:background .2s ease;}
.logo:hover .logo-sep{background:var(--lime);}
.nav-desktop{display:none;align-items:center;gap:2px;}
@media(min-width:1024px){.nav-desktop{display:flex;}}
.nav-link{position:relative;padding:10px 12px;font-size:15px;color:var(--graphite);transition:color .18s ease;white-space:nowrap;}
.nav-link::after{content:"";position:absolute;left:50%;bottom:4px;width:0;height:2px;background:var(--lime);transform:translateX(-50%);transition:width .22s var(--ease);}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{width:60%;}
.nav-cta{
  margin-left:10px;padding:10px 20px;font-size:15px;
  border:1px solid var(--ink);border-radius:var(--r-pill);color:var(--ink);
  transition:transform .2s var(--ease),background .2s ease,color .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{background:var(--ink);color:var(--lime);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.menu-btn{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 11px;background:transparent;
  border:1px solid var(--line);border-radius:12px;cursor:pointer;
  transition:border-color .2s ease;
}
.menu-btn span{display:block;height:1.5px;background:var(--ink);border-radius:2px;}
.menu-btn:hover{border-color:var(--ink);}
@media(min-width:1024px){.menu-btn{display:none;}}

/* ---------- drawer ---------- */
.drawer{position:fixed;inset:0;z-index:90;pointer-events:none;}
.drawer-mask{position:absolute;inset:0;background:rgba(15,26,22,.45);opacity:0;transition:opacity .26s ease;}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:min(86vw,360px);
  background:var(--bg);display:flex;flex-direction:column;
  padding:22px 20px 28px;overflow-y:auto;
  transform:translateX(100%);transition:transform .28s var(--ease);
  box-shadow:var(--shadow-3);
}
.drawer.is-open{pointer-events:auto;}
.drawer.is-open .drawer-mask{opacity:1;}
.drawer.is-open .drawer-panel{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-close{width:40px;height:40px;background:transparent;border:1px solid var(--line);border-radius:12px;font-size:18px;color:var(--ink);cursor:pointer;line-height:1;}
.drawer-nav{display:flex;flex-direction:column;padding:12px 0;}
.drawer-nav a{padding:14px 4px;font-size:16px;color:var(--graphite);border-bottom:1px solid var(--line);transition:color .18s ease,padding-left .18s ease;}
.drawer-nav a:hover{color:var(--ink);padding-left:8px;}
.drawer-nav a.is-active{color:var(--ink);font-weight:600;border-bottom-color:var(--ink);}
.drawer-foot{margin-top:auto;padding-top:20px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:12px 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn:active{transform:translateY(0);}
.btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
.btn-primary{background:var(--ink);color:var(--lime);}
.btn-primary:hover{background:#16241e;}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--lime);}
.btn-lime{background:var(--lime);color:var(--ink);}
.btn-lime:hover{background:#d3fa6b;}
.btn-outline-light{border-color:rgba(242,245,238,.45);color:var(--dark-text);background:transparent;}
.btn-outline-light:hover{border-color:var(--lime);color:var(--lime);}
.btn-block{width:100%;}
.btn-sm{min-height:38px;padding:8px 18px;font-size:14px;}

/* ---------- tags ---------- */
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.14em;
  color:var(--graphite);text-transform:uppercase;
}
.badge{
  display:inline-flex;align-items:center;padding:5px 13px;border-radius:var(--r-pill);
  background:var(--mist);color:var(--graphite);font-size:13px;font-weight:500;letter-spacing:.02em;
}

/* ---------- page hero ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.page-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center right;opacity:.55;}
.page-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(246,244,239,.97) 0%,rgba(246,244,239,.9) 42%,rgba(246,244,239,.62) 100%);
}
.page-hero-inner{
  position:relative;display:flex;align-items:flex-end;justify-content:space-between;
  gap:40px;padding-top:38px;padding-bottom:40px;min-height:302px;
}
@media(min-width:1024px){.page-hero-inner{min-height:330px;padding-top:48px;padding-bottom:48px;}}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--graphite);margin-bottom:18px;}
.breadcrumb a{transition:color .18s ease;}
.breadcrumb a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:4px;}
.breadcrumb .current{color:var(--ink);}
.page-title{
  font-size:clamp(34px,5.4vw,58px);line-height:1.12;font-weight:700;letter-spacing:-.02em;
  margin:14px 0 16px;max-width:720px;
}
.page-sub{max-width:560px;font-size:16.5px;color:var(--graphite);line-height:1.85;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-badges{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:26px;font-size:13.5px;color:var(--graphite);font-weight:500;}
.hero-badges i{width:4px;height:4px;border-radius:50%;background:var(--line);display:inline-block;}
.page-hero-side{display:none;}
@media(min-width:1024px){.page-hero-side{display:block;padding-bottom:10px;}}
.vertical-note{
  writing-mode:vertical-rl;letter-spacing:.34em;font-size:13px;color:var(--graphite);
  font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
  border-right:1px solid var(--line);padding-right:14px;
}

/* ---------- sections ---------- */
.section{padding:76px 0;}
@media(min-width:1024px){.section{padding:96px 0;}}
.section-alt{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-tight{padding:60px 0;}
@media(min-width:1024px){.section-tight{padding:76px 0;}}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head h2{font-size:clamp(26px,3.2vw,38px);line-height:1.22;letter-spacing:-.01em;margin:12px 0 14px;}
.section-head p{color:var(--graphite);font-size:16px;}

/* ---------- guide grid ---------- */
.guide-grid{display:grid;grid-template-columns:1fr;gap:36px;}
@media(min-width:1024px){.guide-grid{grid-template-columns:minmax(0,7.1fr) minmax(0,4.9fr);gap:56px;}}
.longform{max-width:770px;}
.longform h2{font-size:clamp(24px,2.6vw,30px);line-height:1.3;letter-spacing:-.01em;margin-bottom:16px;}
.longform h3{font-size:20px;line-height:1.4;margin:34px 0 12px;padding-left:12px;border-left:3px solid var(--lime);}
.longform p{margin-bottom:18px;color:var(--text);}
.longform ol,.longform ul{padding-left:22px;margin:0 0 22px;}
.longform ol{list-style:decimal;}
.longform ul{list-style:disc;}
.longform li{margin-bottom:10px;}
.longform ::marker{color:#7d8a83;}
.quote-block{
  margin:26px 0;padding:20px 24px;background:var(--mist);
  border-left:3px solid var(--ink);border-radius:0 12px 12px 0;
  color:var(--ink);font-size:16.5px;line-height:1.8;
}
.longform figure{margin:26px 0 30px;}
.longform figure img{width:100%;border-radius:14px;border:1px solid var(--line);}
.longform figcaption{margin-top:10px;font-size:13px;color:var(--graphite);letter-spacing:.02em;}

.side-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);
}
@media(min-width:1024px){.side-card{position:sticky;top:calc(var(--header-h) + 24px);}}
.side-card img{width:100%;border-radius:12px;aspect-ratio:16/10;object-fit:cover;margin-bottom:18px;}
.side-card h3{font-size:19px;margin-bottom:14px;}
.side-list{list-style:none;padding:0;margin:0 0 20px;}
.side-list li{
  position:relative;padding:11px 0 11px 20px;font-size:15px;color:var(--graphite);
  border-bottom:1px solid var(--line);
}
.side-list li:last-child{border-bottom:0;}
.side-list li::before{
  content:"";position:absolute;left:0;top:20px;width:7px;height:7px;
  border-radius:50%;background:var(--lime);
}
.side-tip{
  margin-top:16px;padding:14px 16px;background:var(--mist);border-radius:12px;
  font-size:13.5px;color:var(--graphite);line-height:1.75;
}

/* ---------- split list ---------- */
.split-list{display:grid;grid-template-columns:1fr;gap:32px;}
@media(min-width:1024px){.split-list{grid-template-columns:minmax(0,4.2fr) minmax(0,7.8fr);gap:64px;align-items:start;}}
.split-head h2{font-size:clamp(25px,3vw,34px);line-height:1.24;letter-spacing:-.01em;margin:12px 0 14px;}
.split-head p{color:var(--graphite);font-size:15.5px;}
.plain-list{list-style:none;padding:0;margin:0;}
.plain-list li{display:flex;gap:20px;padding:22px 0;border-top:1px solid var(--line);}
.plain-list li:last-child{border-bottom:1px solid var(--line);}
.dot-num{
  flex:0 0 auto;font-size:13px;color:var(--graphite);letter-spacing:.1em;
  padding-top:6px;min-width:34px;
}
.plain-list h3{font-size:18px;margin-bottom:6px;}
.plain-list p{color:var(--graphite);font-size:15px;}

/* ---------- step strip ---------- */
.step-strip{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr;gap:22px;}
@media(min-width:768px){.step-strip{grid-template-columns:repeat(4,1fr);gap:24px;}}
.step-item{position:relative;padding-top:24px;border-top:1px solid var(--line);}
.step-item::before{
  content:"";position:absolute;top:-1px;left:0;width:46px;height:2px;background:var(--lime);
}
.step-num{font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;font-size:13px;letter-spacing:.12em;color:var(--graphite);}
.step-item h3{font-size:18px;margin:10px 0 8px;}
.step-item p{font-size:14.5px;color:var(--graphite);line-height:1.75;}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;}
.faq-item{position:relative;border-bottom:1px solid var(--line);transition:padding-left .22s var(--ease);}
.faq-item.is-open{padding-left:16px;}
.faq-item.is-open::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  background:var(--lime);border-radius:2px;
}
.faq-q{
  display:flex;align-items:center;gap:14px;width:100%;
  padding:20px 0;background:transparent;border:0;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink);cursor:pointer;
  transition:color .18s ease;
}
.faq-q:hover{color:#1d2c25;}
.faq-index{font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;font-size:13px;color:var(--graphite);flex:0 0 auto;}
.faq-icon{
  margin-left:auto;flex:0 0 auto;width:24px;height:24px;line-height:22px;text-align:center;
  border:1px solid var(--line);border-radius:50%;font-size:15px;color:var(--graphite);
  transition:transform .24s var(--ease),background .24s ease,color .24s ease,border-color .24s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--ink);border-color:var(--ink);color:var(--lime);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease);}
.faq-a p{padding-bottom:22px;font-size:15.5px;color:var(--graphite);line-height:1.85;}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--ink);color:var(--dark-text);}
.cta-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.14;}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(15,26,22,.96) 0%,rgba(15,26,22,.78) 60%,rgba(15,26,22,.6) 100%);
}
.cta-inner{
  position:relative;z-index:2;display:flex;flex-direction:column;gap:26px;
  padding:62px 0;align-items:flex-start;
}
@media(min-width:1024px){
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:76px 0;gap:48px;}
}
.cta-inner h2{color:var(--dark-text);font-size:clamp(25px,3.1vw,36px);line-height:1.25;letter-spacing:-.01em;margin-bottom:12px;}
.cta-inner p{color:var(--dark-sub);font-size:16px;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--dark-text);padding:64px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:2.1fr 1fr 1fr 1fr;gap:48px;}}
.footer-brand{display:inline-flex;align-items:center;gap:9px;font-size:19px;color:var(--dark-text);}
.footer-brand .logo-sub{color:var(--dark-sub);}
.footer-brand .logo-sep{background:rgba(242,245,238,.28);}
.footer-desc{margin-top:16px;font-size:14.5px;line-height:1.85;color:var(--dark-sub);max-width:380px;}
.footer-col h3{color:var(--dark-text);font-size:15px;margin-bottom:16px;letter-spacing:.04em;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14.5px;color:var(--dark-sub);transition:color .18s ease,padding-left .18s ease;}
.footer-links a:hover{color:var(--lime);padding-left:4px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(242,245,238,.14);
  display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--dark-sub);
}
@media(min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:22px;bottom:22px;z-index:70;
  display:flex;align-items:center;gap:12px;
  padding:9px 12px 9px 18px;border-radius:var(--r-pill);
  background:rgba(15,26,22,.92);color:var(--dark-text);box-shadow:var(--shadow-3);
  font-size:14px;opacity:0;transform:translateY(16px);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.float-cta.is-visible{opacity:.94;transform:translateY(0);pointer-events:auto;}
.float-cta.is-visible:hover{opacity:1;}
.float-close{
  width:26px;height:26px;flex:0 0 auto;border-radius:50%;
  background:transparent;border:1px solid rgba(242,245,238,.3);
  color:var(--dark-sub);font-size:13px;line-height:1;cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.float-close:hover{border-color:var(--lime);color:var(--lime);}
@media(max-width:767px){
  .float-cta{left:12px;right:12px;bottom:12px;border-radius:16px;justify-content:space-between;padding:10px 12px 10px 16px;}
  .float-cta .float-text{font-size:13.5px;}
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}
.reveal.d1{transition-delay:.07s;}
.reveal.d2{transition-delay:.14s;}
.reveal.d3{transition-delay:.21s;}
section[id]{scroll-margin-top:calc(var(--header-h) + 16px);}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  .btn:hover,.nav-cta:hover{transform:none;}
}

/* roulang page: category2 */
:root{
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --ink:#0F1A16;
  --accent:#C6F24E;
  --graphite:#5C6A63;
  --line:#D9DED6;
  --mist:#E9EDE6;
  --text:#2A332E;
  --dark-text:#F2F5EE;
  --dark-sub:#A9B4AB;
  --radius-sm:12px;
  --radius:16px;
  --radius-lg:20px;
  --shadow-1:0 1px 2px rgba(15,26,22,.06);
  --shadow-2:0 10px 30px -12px rgba(15,26,22,.18);
  --shadow-3:0 18px 48px -20px rgba(15,26,22,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.94);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;letter-spacing:-.01em;white-space:nowrap}
.logo-mark{font-weight:700;color:var(--ink)}
.logo-sep{width:1px;height:18px;background:var(--line)}
.logo-sub{font-weight:400;color:var(--graphite)}
.nav-desktop{display:none;align-items:center;gap:26px}
@media (min-width:1024px){.nav-desktop{display:flex}}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text);
  padding:6px 2px;transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:20%;right:20%;bottom:0;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:center;transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 20px;border-radius:999px;
  border:1px solid var(--ink);color:var(--ink);
  font-size:14px;font-weight:600;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-cta:hover{background:var(--ink);color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.nav-cta:active{transform:translateY(0)}
.menu-btn{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;border:1px solid var(--line);border-radius:12px;background:var(--surface);
  cursor:pointer;
}
@media (min-width:1024px){.menu-btn{display:none}}
.menu-btn span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(15,26,22,.42);opacity:0;pointer-events:none;
  transition:opacity .24s var(--ease);z-index:70;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;background:var(--bg);
  transform:translateX(100%);transition:transform .28s var(--ease);z-index:80;
  display:flex;flex-direction:column;padding:22px 22px calc(22px + env(safe-area-inset-bottom));
  box-shadow:var(--shadow-3);
}
.drawer.is-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-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:var(--surface);font-size:18px;line-height:1;cursor:pointer;color:var(--ink)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;padding-top:14px;overflow-y:auto;flex:1}
.drawer-nav a{padding:12px 10px;border-radius:12px;font-size:16px;font-weight:500;color:var(--text)}
.drawer-nav a.is-active{background:var(--mist);color:var(--ink);font-weight:600;border-left:3px solid var(--accent)}
.drawer-nav a:hover{background:var(--mist)}
.drawer-foot{padding-top:16px;border-top:1px solid var(--line)}
.drawer-foot .btn{width:100%}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--ink);color:var(--accent)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-light{background:var(--accent);color:var(--ink)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow-3)}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding:22px 0 0;font-size:13.5px;color:var(--graphite);letter-spacing:.02em}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0;padding:0}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line)}
.breadcrumb a:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:4px}
.breadcrumb [aria-current]{color:var(--ink);font-weight:600}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;margin-top:18px;border-radius:var(--radius-lg);overflow:hidden;
  min-height:300px;display:flex;align-items:flex-end;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(15,26,22,.92) 0%,rgba(15,26,22,.78) 42%,rgba(15,26,22,.34) 100%);
}
.cat-hero-inner{position:relative;z-index:2;padding:32px 24px 34px;max-width:820px}
@media (min-width:768px){.cat-hero-inner{padding:44px 44px 46px}}
.tag-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(198,242,78,.14);border:1px solid rgba(198,242,78,.45);
  color:var(--accent);font-size:12.5px;font-weight:600;letter-spacing:.06em;
}
.cat-hero h1{
  margin:18px 0 0;color:#fff;
  font-size:clamp(28px,4.4vw,46px);font-weight:700;letter-spacing:-.02em;line-height:1.18;
}
.cat-hero p{margin:14px 0 0;color:#DCE3DA;font-size:clamp(15px,1.4vw,17px);max-width:660px;line-height:1.8}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:22px;color:var(--dark-sub);font-size:13.5px}
.hero-meta span{display:inline-flex;align-items:center;gap:8px}
.hero-meta i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}

/* ---------- sections ---------- */
.section{padding:76px 0}
@media (min-width:768px){.section{padding:96px 0}}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--graphite);font-weight:600;
}
h2.section-title{
  margin:14px 0 0;color:var(--ink);
  font-size:clamp(25px,3.2vw,38px);font-weight:700;letter-spacing:-.01em;line-height:1.24;
}
.section-sub{margin:16px 0 0;color:var(--graphite);font-size:16px;max-width:680px}

/* ---------- steps ---------- */
.steps{display:flex;flex-direction:column;gap:56px}
@media (min-width:768px){.steps{gap:84px}}
.step-row{
  display:grid;grid-template-columns:1fr;gap:24px;align-items:center;
}
@media (min-width:900px){
  .step-row{grid-template-columns:1.05fr 1fr;gap:56px}
  .step-row.is-rev .step-media{order:-1}
}
.step-num{
  font-family:var(--font-mono);font-size:13px;font-weight:600;letter-spacing:.18em;
  color:var(--graphite);display:inline-flex;align-items:center;gap:10px;
}
.step-num::before{content:"";width:28px;height:2px;background:var(--accent);display:inline-block}
.step-title{margin:14px 0 0;color:var(--ink);font-size:clamp(21px,2.1vw,26px);font-weight:700;letter-spacing:-.01em;line-height:1.3}
.step-text{margin:14px 0 0;color:var(--text);font-size:16px;line-height:1.9}
.step-list{margin:18px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:10px}
.step-list li{position:relative;padding-left:26px;color:var(--graphite);font-size:15px;line-height:1.8}
.step-list li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:2px solid var(--ink);border-bottom:2px solid var(--ink);
  transform:rotate(-45deg);
}
.step-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;aspect-ratio:16/10;background:var(--mist);border:1px solid var(--line);box-shadow:var(--shadow-1)}
.step-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.step-media:hover img{transform:scale(1.02)}
.step-media figcaption{
  position:absolute;left:14px;bottom:14px;padding:7px 14px;border-radius:999px;
  background:rgba(15,26,22,.82);color:var(--dark-text);font-size:12.5px;font-weight:500;
}

/* ---------- points bar ---------- */
.points-bar{
  background:var(--ink);border-radius:var(--radius-lg);padding:28px 22px;color:var(--dark-text);
  display:grid;gap:22px;grid-template-columns:1fr;
}
@media (min-width:640px){.points-bar{padding:32px 30px;grid-template-columns:repeat(2,1fr);gap:26px}}
@media (min-width:1024px){.points-bar{grid-template-columns:repeat(4,1fr)}}
.point h3{margin:0;font-size:16.5px;font-weight:600;color:#fff;display:flex;align-items:center;gap:10px}
.point h3 b{font-family:var(--font-mono);color:var(--accent);font-size:14px;font-weight:700}
.point p{margin:10px 0 0;font-size:14px;color:var(--dark-sub);line-height:1.8}

/* ---------- compare list ---------- */
.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px;box-shadow:var(--shadow-1);
}
@media (min-width:768px){.panel{padding:34px}}
.compare{display:grid;gap:0;border-top:1px solid var(--line)}
.compare-row{
  display:grid;grid-template-columns:1fr;gap:6px;padding:20px 0;border-bottom:1px solid var(--line);
}
@media (min-width:768px){
  .compare-row{grid-template-columns:.72fr 1.28fr;gap:32px;align-items:baseline}
}
.compare-row h3{margin:0;font-size:17px;font-weight:600;color:var(--ink)}
.compare-row p{margin:0;color:var(--graphite);font-size:15.2px;line-height:1.85}
.compare-tag{
  display:inline-block;margin-top:8px;padding:3px 10px;border-radius:999px;background:var(--mist);
  color:var(--graphite);font-size:12px;font-weight:600;letter-spacing:.04em;
}
@media (min-width:768px){.compare-tag{margin-top:0;margin-left:10px}}

/* ---------- checklist ---------- */
.check-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:768px){.check-grid{grid-template-columns:repeat(3,1fr)}}
.check-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.check-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(198,242,78,.6)}
.check-card .ic{
  width:42px;height:42px;border-radius:12px;background:var(--mist);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-weight:700;color:var(--ink);font-size:15px;
}
.check-card h3{margin:18px 0 0;font-size:18px;font-weight:600;color:var(--ink)}
.check-card p{margin:10px 0 0;font-size:14.6px;color:var(--graphite);line-height:1.85}

/* ---------- faq ---------- */
.faq-wrap{display:flex;flex-direction:column;gap:14px;max-width:860px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item:hover{border-color:rgba(15,26,22,.22)}
.faq-item[open]{background:var(--mist);border-color:var(--line);box-shadow:var(--shadow-1)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;
  padding:20px 22px;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .idx{font-family:var(--font-mono);font-size:13.5px;color:var(--graphite);min-width:26px}
.faq-item summary .q{flex:1;line-height:1.55}
.faq-item summary .ico{
  position:relative;width:22px;height:22px;flex:none;border-radius:50%;border:1px solid var(--ink);
}
.faq-item summary .ico::before,
.faq-item summary .ico::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);transform:translate(-50%,-50%);
}
.faq-item summary .ico::before{width:10px;height:1.5px}
.faq-item summary .ico::after{width:1.5px;height:10px;transition:transform .24s var(--ease),opacity .24s var(--ease)}
.faq-item[open] summary .ico::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.faq-answer{padding:0 22px 22px 64px;color:var(--graphite);font-size:15.4px;line-height:1.9}
@media (max-width:520px){.faq-answer{padding-left:22px}}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:0;
  background-image:linear-gradient(90deg,rgba(15,26,22,.96),rgba(15,26,22,.86)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  color:var(--dark-text);
}
.cta-inner{padding:64px 0;display:flex;flex-direction:column;gap:26px;align-items:flex-start}
@media (min-width:900px){
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:48px;padding:72px 0}
}
.cta-inner h2{margin:0;font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.01em;color:#fff;line-height:1.3}
.cta-inner p{margin:12px 0 0;color:var(--dark-sub);font-size:15.5px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--dark-text);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;padding-bottom:44px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px}
.footer-brand .logo-mark{color:#fff}
.footer-brand .logo-sep{background:rgba(255,255,255,.24);width:1px;height:18px;display:inline-block}
.footer-brand .logo-sub{color:var(--dark-sub)}
.footer-desc{margin:16px 0 0;font-size:14.4px;color:var(--dark-sub);line-height:1.9;max-width:380px}
.footer-col h3{margin:0 0 16px;font-size:13px;font-weight:600;letter-spacing:.1em;color:#fff;text-transform:uppercase}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14.6px;color:var(--dark-sub);transition:color .18s var(--ease),transform .18s var(--ease)}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0 30px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:rgba(169,180,171,.9);
}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:20px;bottom:20px;z-index:55;
  display:flex;align-items:center;gap:14px;
  padding:10px 12px 10px 20px;border-radius:999px;
  background:rgba(15,26,22,.86);color:var(--dark-text);
  box-shadow:var(--shadow-3);backdrop-filter:blur(8px);
  opacity:.55;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),background .24s var(--ease);
  pointer-events:auto;
}
.float-cta.is-open{opacity:1;transform:translateY(0);background:rgba(15,26,22,.96)}
.float-cta.is-hidden{display:none}
.float-cta .txt{font-size:13.6px;color:var(--dark-sub);white-space:nowrap}
.float-cta .btn{min-height:38px;padding:0 18px;font-size:13.6px}
.float-cta .close{
  width:28px;height:28px;border-radius:50%;border:1px solid rgba(255,255,255,.24);
  background:transparent;color:var(--dark-sub);cursor:pointer;font-size:14px;line-height:1;
}
.float-cta .close:hover{color:#fff;border-color:rgba(255,255,255,.5)}
@media (max-width:768px){
  .float-cta{
    left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));
    border-radius:16px;justify-content:space-between;padding:12px 14px;
    opacity:.7;
  }
  .float-cta .txt{white-space:normal;font-size:13px;line-height:1.5}
  .float-cta .close{order:-1}
}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}
.anchor-target{scroll-margin-top:92px}

/* roulang page: category3 */
:root{
  --bg:#F6F4EF;
  --card:#FFFFFF;
  --ink:#0F1A16;
  --text:#2A332E;
  --graphite:#5C6A63;
  --accent:#C6F24E;
  --line:#D9DED6;
  --mist:#E9EDE6;
  --radius-card:16px;
  --radius-lg:20px;
  --shadow-1:0 1px 2px rgba(15,26,22,.06);
  --shadow-2:0 10px 30px -12px rgba(15,26,22,.18);
  --shadow-3:0 18px 48px -20px rgba(15,26,22,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#F2F5EE;padding:10px 18px;border-radius:0 0 12px 0;z-index:200}
.skip-link:focus{left:0}
.mono{font-family:ui-monospace,"SFMono-Regular",Consolas,monospace}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;
  font-size:16px;font-weight:600;line-height:1;
  border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s,color .2s,border-color .2s;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-accent{background:var(--accent);color:var(--ink);border-color:var(--accent)}
.btn-accent:hover{box-shadow:0 14px 30px -14px rgba(198,242,78,.9)}
.btn-dark{background:var(--ink);color:var(--accent)}
.btn-dark:hover{box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;color:#F2F5EE;border-color:rgba(242,245,238,.42)}
.btn-ghost:hover{background:rgba(242,245,238,.12)}
.btn-outline{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-outline:hover{border-color:var(--ink);box-shadow:var(--shadow-1)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--mist);color:var(--graphite);font-size:13px;font-weight:500;letter-spacing:.02em;
}
.tag-dark{background:rgba(242,245,238,.14);color:#DDE5DA}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--graphite);text-transform:uppercase;margin-bottom:14px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.9);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .22s,box-shadow .22s,background .22s;
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(246,244,239,.96)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:70px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;letter-spacing:-.01em}
.logo-mark{font-weight:800;color:var(--ink)}
.logo-sep{display:inline-block;width:1px;height:18px;background:var(--line)}
.logo-sub{font-weight:500;color:var(--graphite)}
.nav-desktop{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--graphite);
  transition:color .18s;
}
.nav-link:hover{color:var(--ink)}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-4px;height:2px;width:0;
  background:var(--accent);transform:translateX(-50%);
  transition:width .22s var(--ease);
}
.nav-link:hover::after,.nav-link.is-active::after{width:60%}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 22px;
  border-radius:999px;border:1px solid rgba(15,26,22,.85);
  font-size:15px;font-weight:600;color:var(--ink);
  transition:background .2s,color .2s,transform .2s var(--ease);
}
.nav-cta:hover{background:var(--ink);color:var(--accent);transform:translateY(-1px)}
.menu-btn{
  display:none;width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border-radius:12px;
}
.menu-btn span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s,opacity .2s}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;inset:0;z-index:70;background:rgba(15,26,22,.45);
  opacity:0;pointer-events:none;transition:opacity .25s;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;z-index:80;height:100%;width:min(86vw,360px);
  background:var(--bg);padding:20px 22px 28px;
  display:flex;flex-direction:column;
  transform:translateX(102%);transition:transform .28s var(--ease);
  box-shadow:var(--shadow-3);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.drawer-title{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--graphite)}
.drawer-close{width:44px;height:44px;font-size:26px;line-height:1;color:var(--graphite);border-radius:12px}
.drawer-close:hover{color:var(--ink)}
.drawer-nav{display:flex;flex-direction:column;margin-top:6px}
.drawer-nav a{padding:15px 2px;border-bottom:1px solid var(--line);font-size:16px;font-weight:500;color:var(--graphite)}
.drawer-nav a.is-active{color:var(--ink);font-weight:700;box-shadow:inset 3px 0 0 var(--accent);padding-left:12px}
.drawer-cta{margin-top:auto}

/* ============ 面包屑 ============ */
.crumb-bar{padding:18px 0 0}
.crumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--graphite);flex-wrap:wrap}
.crumb a{transition:color .18s}
.crumb a:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:4px}
.crumb-sep{color:var(--line)}
.crumb [aria-current]{color:var(--ink);font-weight:600}

/* ============ 分类首屏 ============ */
.cat-hero{
  position:relative;margin-top:20px;
  background-image:linear-gradient(100deg,rgba(15,26,22,.94) 0%,rgba(15,26,22,.72) 46%,rgba(15,26,22,.42) 100%),
                   url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  color:#F2F5EE;
  padding:52px 0 56px;
  min-height:300px;
  border-radius:0 0 24px 24px;
  overflow:hidden;
}
.cat-hero-inner{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,.85fr);gap:48px;align-items:end;position:relative;z-index:2}
.cat-hero h1{
  color:#F2F5EE;font-size:clamp(28px,4.1vw,46px);font-weight:700;letter-spacing:-.02em;line-height:1.16;
  margin-bottom:18px;
}
.cat-hero .lead{color:#C7D1C6;font-size:17px;line-height:1.85;max-width:620px;margin-bottom:26px}
.cat-hero .eyebrow{color:var(--accent)}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.cat-hero-aside{
  background:rgba(242,245,238,.06);
  border:1px solid rgba(242,245,238,.16);
  border-radius:var(--radius-lg);
  padding:24px 24px 22px;
  backdrop-filter:blur(4px);
}
.aside-num{
  display:block;font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
  font-size:38px;font-weight:700;color:var(--accent);line-height:1;margin-bottom:14px;
}
.cat-hero-aside p{color:#B9C4B9;font-size:14.5px;line-height:1.85}
.aside-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}

/* ============ 板块 ============ */
.section{padding:88px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{font-size:clamp(25px,3.3vw,38px);margin-bottom:14px}
.section-sub{color:var(--graphite);font-size:16px;line-height:1.85}

/* ============ 非等宽卡片网格 ============ */
.card-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.span-7{grid-column:span 7}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-4{grid-column:span 4}
.spec-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 28px 26px;
  box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s;
  display:flex;flex-direction:column;
}
.spec-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(198,242,78,.65)}
.spec-top{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.spec-num{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:40px;height:30px;padding:0 10px;border-radius:999px;
  background:var(--ink);color:var(--accent);
  font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
  font-size:14px;font-weight:700;letter-spacing:.04em;
}
.spec-card h3{font-size:21px;font-weight:600;margin-bottom:12px}
.spec-card p{font-size:15.5px;line-height:1.85;color:var(--graphite)}
.spec-points{margin-top:18px;display:flex;flex-direction:column;gap:9px}
.spec-points li{position:relative;padding-left:22px;font-size:14.5px;color:var(--text)}
.spec-points li::before{
  content:"";position:absolute;left:0;top:10px;width:9px;height:9px;border-radius:3px;
  background:var(--accent);box-shadow:inset 0 0 0 1px rgba(15,26,22,.18);
}
.card-media{
  margin-top:20px;border-radius:14px;width:100%;aspect-ratio:16/10;object-fit:cover;
  border:1px solid var(--line);
  transition:transform .35s var(--ease);
}
.spec-card:hover .card-media{transform:scale(1.02)}
.spec-card--ink{background:var(--ink);border-color:var(--ink);color:#F2F5EE}
.spec-card--ink h3{color:#F2F5EE}
.spec-card--ink p{color:#A9B4AB}
.spec-card--ink .spec-points li{color:#D6DED4}
.spec-card--ink .spec-num{background:var(--accent);color:var(--ink)}
.spec-card--ink:hover{border-color:var(--accent)}

/* ============ 自检条 ============ */
.strip{background:var(--mist);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:52px 0}
.strip-inner{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,2fr);gap:40px;align-items:start}
.strip-label{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--graphite);margin-bottom:10px}
.strip-inner h2{font-size:clamp(22px,2.6vw,30px)}
.strip-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.strip-list li{
  display:flex;align-items:flex-start;gap:12px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;font-size:15px;color:var(--text);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.strip-list li:hover{transform:translateY(-2px);box-shadow:var(--shadow-1)}
.strip-list i{color:var(--ink);font-size:15px;margin-top:5px}
.strip-list .dot{
  width:26px;height:26px;border-radius:8px;background:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;margin-top:2px;
}
.strip-list .dot i{font-size:12px;color:var(--ink);margin:0}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-item::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:0;
  background:var(--accent);transition:width .22s var(--ease);border-radius:2px;
}
.faq-item.is-open::before{width:3px}
.faq-q{
  width:100%;display:flex;align-items:center;gap:18px;
  padding:24px 0 24px 16px;text-align:left;
}
.faq-index{
  font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
  font-size:14px;font-weight:700;color:var(--graphite);flex:0 0 auto;letter-spacing:.04em;
}
.faq-item.is-open .faq-index{color:var(--ink)}
.faq-text{font-size:18px;font-weight:600;color:var(--ink);flex:1 1 auto}
.faq-icon{
  position:relative;width:22px;height:22px;flex:0 0 auto;border-radius:50%;
  border:1px solid var(--line);background:#fff;
  transition:transform .24s var(--ease),background .24s,border-color .24s;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:1.6px}
.faq-icon::after{width:1.6px;height:10px;transition:opacity .2s}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--accent);border-color:var(--accent)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease)}
.faq-item.is-open .faq-a{max-height:320px}
.faq-a p{padding:0 46px 26px 16px;font-size:15.5px;line-height:1.9;color:var(--graphite)}

/* ============ 尾部 CTA ============ */
.cta-band{background:var(--ink);color:#F2F5EE;padding:64px 0;margin-top:8px}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:#F2F5EE;font-size:clamp(24px,3vw,34px);margin-bottom:12px}
.cta-inner p{color:#A9B4AB;font-size:15.5px;max-width:560px}
.cta-btns{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#F2F5EE;padding:64px 0 0;border-top:1px solid rgba(242,245,238,.12)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;margin-bottom:16px}
.footer-brand .logo-mark{color:#F2F5EE}
.footer-brand .logo-sub{color:#A9B4AB}
.footer-brand .logo-sep{background:rgba(242,245,238,.24)}
.footer-desc{color:#A9B4AB;font-size:14px;line-height:1.9;max-width:380px}
.footer-col h3{font-size:15px;color:#F2F5EE;margin-bottom:16px;font-weight:600}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:#A9B4AB;transition:color .18s,transform .18s}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(242,245,238,.14);
  padding:22px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#8B978E;
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:65;
  display:flex;align-items:center;gap:12px;
  padding:10px 12px 10px 18px;border-radius:999px;
  background:rgba(255,255,255,.86);
  border:1px solid var(--line);
  box-shadow:var(--shadow-2);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  opacity:0;transform:translateY(14px) scale(.96);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto}
.float-cta span{font-size:14px;color:var(--graphite);white-space:nowrap}
.float-close{
  width:30px;height:30px;border-radius:50%;font-size:18px;line-height:1;color:var(--graphite);
  display:inline-flex;align-items:center;justify-content:center;transition:background .18s,color .18s;
}
.float-close:hover{background:var(--mist);color:var(--ink)}
.float-cta.is-dismissed{display:none}

/* ============ 滚动出现 ============ */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .45s var(--ease),transform .45s var(--ease)}
.js .reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .nav-desktop{display:none}
  .menu-btn{display:flex}
  .cat-hero-inner{grid-template-columns:1fr;gap:30px;align-items:start}
  .cat-hero-aside{max-width:520px}
  .span-7,.span-5,.span-6{grid-column:span 6}
  .span-4{grid-column:span 6}
  .strip-inner{grid-template-columns:1fr;gap:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .cat-hero{padding:40px 0 44px;border-radius:0 0 20px 20px;min-height:0}
  .card-grid{gap:16px}
  .span-7,.span-5,.span-6,.span-4{grid-column:span 12}
  .spec-card{padding:24px 22px}
  .strip-list{grid-template-columns:1fr}
  .faq-text{font-size:16.5px}
  .faq-a p{padding:0 12px 24px 16px}
  .cta-band{padding:52px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .float-cta{
    right:12px;left:12px;bottom:0;border-radius:16px 16px 0 0;
    padding:14px 14px calc(14px + env(safe-area-inset-bottom)) 18px;
    justify-content:space-between;
  }
  .float-cta span{white-space:normal;font-size:13.5px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-desc{max-width:none}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  body{font-size:16px}
  .container{padding:0 16px}
  .logo{font-size:17px}
  .btn{height:46px;padding:0 20px;font-size:15px;width:100%}
  .hero-btns{flex-direction:column;width:100%}
  .cta-btns{flex-direction:column;width:100%}
  .faq-q{gap:12px;padding:20px 0 20px 14px}
  .section-head{margin-bottom:30px}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
    --bg:#F6F4EF;
    --surface:#FFFFFF;
    --ink:#0F1A16;
    --accent:#C6F24E;
    --muted:#5C6A63;
    --line:#D9DED6;
    --mist:#E9EDE6;
    --text:#2A332E;
    --dark-text:#F2F5EE;
    --dark-muted:#A9B4AB;
    --radius-card:16px;
    --radius-lg:20px;
    --radius-pill:999px;
    --shadow-1:0 1px 2px rgba(15,26,22,.06);
    --shadow-2:0 10px 30px -12px rgba(15,26,22,.18);
    --shadow-3:0 18px 48px -20px rgba(15,26,22,.28);
    --ease:cubic-bezier(.22,.61,.36,1);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  html body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;}
  h1,h2,h3,h4,p{margin:0;}
  .mono{font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;}

  /* 容器 */
  .container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
  @media (min-width:768px){.container{padding-left:32px;padding-right:32px;}}

  /* 顶部导航 */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(246,244,239,.94);
    border-bottom:1px solid transparent;
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease),backdrop-filter .2s;
  }
  .site-header.is-scrolled{
    border-bottom-color:var(--line);
    box-shadow:var(--shadow-1);
    backdrop-filter:blur(10px);
  }
  .header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px;}
  .logo{display:flex;align-items:center;gap:10px;font-size:19px;color:var(--ink);letter-spacing:-.01em;}
  .logo-mark{font-weight:700;}
  .logo-sep{width:1px;height:18px;background:var(--line);display:inline-block;}
  .logo-sub{font-weight:400;color:var(--muted);font-size:17px;}
  .nav-desktop{display:none;align-items:center;gap:2px;}
  @media (min-width:1024px){.nav-desktop{display:flex;}}
  .nav-link{
    position:relative;padding:10px 12px;font-size:15px;color:var(--muted);
    border-radius:8px;transition:color .18s var(--ease);white-space:nowrap;
  }
  .nav-link::after{
    content:"";position:absolute;left:20%;bottom:2px;width:60%;height:2px;
    background:var(--accent);transform:scaleX(0);transform-origin:center;
    transition:transform .22s var(--ease);border-radius:2px;
  }
  .nav-link:hover{color:var(--ink);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.is-active{color:var(--ink);font-weight:600;}
  .nav-link.is-active::after{transform:scaleX(1);}
  .nav-cta{
    margin-left:12px;display:inline-flex;align-items:center;justify-content:center;
    padding:10px 20px;border-radius:var(--radius-pill);background:var(--ink);
    color:var(--accent);font-size:15px;font-weight:600;
    transition:transform .18s var(--ease),box-shadow .18s var(--ease);
  }
  .nav-cta:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
  .menu-btn{
    display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
    width:44px;height:44px;padding:0 10px;background:transparent;
    border:1px solid var(--line);border-radius:12px;cursor:pointer;
  }
  .menu-btn span{display:block;height:2px;width:100%;background:var(--ink);border-radius:2px;transition:transform .22s var(--ease),opacity .22s;}
  .menu-btn.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .menu-btn.is-open span:nth-child(2){opacity:0;}
  .menu-btn.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  @media (min-width:1024px){.menu-btn{display:none;}}

  /* 移动抽屉 */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(15,26,22,.45);z-index:55;
    opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible;}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:min(86vw,360px);z-index:60;
    background:var(--surface);padding:22px 22px 28px;
    display:flex;flex-direction:column;gap:6px;overflow-y:auto;
    transform:translateX(100%);transition:transform .28s var(--ease);
    box-shadow:var(--shadow-3);
  }
  .drawer.is-open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
  .drawer-close{
    width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
    background:transparent;color:var(--ink);font-size:20px;line-height:1;cursor:pointer;
  }
  .drawer-link{
    padding:13px 12px;border-radius:12px;color:var(--muted);font-size:16px;
    transition:background-color .18s,color .18s;
  }
  .drawer-link:hover{background:var(--mist);color:var(--ink);}
  .drawer-link.is-active{background:var(--mist);color:var(--ink);font-weight:600;}
  .drawer-cta{
    margin-top:auto;display:flex;justify-content:center;align-items:center;
    padding:14px 20px;border-radius:var(--radius-pill);background:var(--ink);color:var(--accent);font-weight:600;
  }

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 24px;border-radius:var(--radius-pill);font-size:15px;font-weight:600;
    border:1px solid transparent;cursor:pointer;min-height:44px;
    transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s,color .18s,border-color .18s;
  }
  .btn:active{transform:translateY(0);}
  .btn-primary{background:var(--accent);color:var(--ink);}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
  .btn-outline{border-color:var(--ink);color:var(--ink);background:transparent;}
  .btn-outline:hover{transform:translateY(-2px);background:var(--mist);box-shadow:var(--shadow-1);}
  .btn-ghost{border-color:rgba(242,245,238,.4);color:var(--dark-text);background:transparent;}
  .btn-ghost:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent);}
  .btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

  /* 首屏 */
  .cat-hero{position:relative;isolation:isolate;background:var(--ink);color:var(--dark-text);overflow:hidden;}
  .hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;opacity:.6;}
  .hero-veil{
    position:absolute;inset:0;z-index:-1;
    background:linear-gradient(100deg,rgba(15,26,22,.95) 0%,rgba(15,26,22,.78) 46%,rgba(15,26,22,.5) 100%);
  }
  .hero-inner{position:relative;padding:52px 0 50px;min-height:300px;display:flex;flex-direction:column;justify-content:center;}
  @media (min-width:1024px){.hero-inner{padding:72px 0 68px;min-height:340px;}}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--dark-muted);margin-bottom:18px;}
  .breadcrumb a{transition:color .18s;}
  .breadcrumb a:hover{color:var(--accent);}
  .hero-title{
    font-size:clamp(28px,4.2vw,50px);line-height:1.16;font-weight:700;letter-spacing:-.02em;
    max-width:820px;
  }
  .hero-sub{margin-top:18px;max-width:640px;color:var(--dark-muted);font-size:16px;line-height:1.85;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
  .hero-note{margin-top:16px;font-size:13px;color:var(--dark-muted);}
  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
  .hero-tag{
    font-size:13px;color:var(--dark-text);padding:6px 14px;border-radius:var(--radius-pill);
    border:1px solid rgba(242,245,238,.24);background:rgba(242,245,238,.06);
  }

  /* 板块 */
  .sec{padding:64px 0;scroll-margin-top:88px;}
  @media (min-width:1024px){.sec{padding:104px 0;}}
  .eyebrow{
    font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
    font-size:12px;letter-spacing:.18em;color:var(--muted);margin-bottom:12px;text-transform:uppercase;
  }
  .sec-title{font-size:clamp(24px,3.2vw,38px);font-weight:700;letter-spacing:-.015em;line-height:1.24;color:var(--ink);}
  .sec-sub{margin-top:14px;color:var(--muted);max-width:720px;font-size:16px;}

  /* 速查标签 */
  .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
  .chip{
    padding:10px 18px;border-radius:var(--radius-pill);border:1px solid var(--line);
    background:var(--mist);color:var(--muted);font-size:14px;font-weight:500;cursor:pointer;min-height:44px;
    transition:background-color .18s var(--ease),color .18s,border-color .18s,transform .18s;
  }
  .chip:hover{transform:translateY(-2px);color:var(--ink);}
  .chip.is-active{background:var(--ink);border-color:var(--ink);color:var(--dark-text);}
  .quick-panels{margin-top:22px;}
  .quick-panel{
    display:none;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:28px;box-shadow:var(--shadow-1);grid-template-columns:1fr;gap:22px;
  }
  .quick-panel.is-active{display:grid;}
  @media (min-width:900px){.quick-panel.is-active{grid-template-columns:1fr 1fr;gap:36px;}}
  .qp-label{
    display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--muted);
    background:var(--mist);border-radius:var(--radius-pill);padding:4px 12px;margin-bottom:10px;
  }
  .qp-text{color:var(--text);font-size:15.5px;line-height:1.9;}

  /* 对比两栏 */
  .compare{
    margin-top:32px;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-1);
  }
  .compare-grid{display:grid;grid-template-columns:1fr;}
  @media (min-width:1024px){.compare-grid{grid-template-columns:1fr 1fr;}}
  .compare-col{padding:30px 26px 34px;}
  @media (min-width:1024px){.compare-col{padding:40px 40px 42px;}}
  .compare-col + .compare-col{border-top:1px solid var(--line);}
  @media (min-width:1024px){.compare-col + .compare-col{border-top:0;border-left:1px solid var(--line);}}
  .compare-badge{
    display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.1em;
    color:var(--muted);margin-bottom:14px;
  }
  .compare-badge b{
    font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
    color:var(--ink);font-size:13px;background:var(--mist);border-radius:8px;padding:3px 9px;
  }
  .compare-title{font-size:22px;font-weight:700;color:var(--ink);margin-bottom:12px;}
  .compare-lede{color:var(--muted);font-size:15px;margin-bottom:20px;}
  .tick-list{display:flex;flex-direction:column;gap:12px;margin-bottom:26px;}
  .tick{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text);}
  .tick-icon{
    flex:0 0 18px;width:18px;height:18px;margin-top:5px;border-radius:50%;
    border:1px solid var(--accent);position:relative;background:rgba(198,242,78,.28);
  }
  .tick-icon::after{
    content:"";position:absolute;left:5px;top:4px;width:6px;height:3px;
    border-left:1.6px solid var(--ink);border-bottom:1.6px solid var(--ink);transform:rotate(-45deg);
  }

  /* 时间线轨道 */
  .track-layout{display:grid;grid-template-columns:1fr;gap:36px;margin-top:34px;}
  @media (min-width:1024px){.track-layout{grid-template-columns:minmax(0,1fr) 340px;gap:56px;}}
  .track{position:relative;}
  .track::before{
    content:"";position:absolute;left:23px;top:12px;bottom:12px;width:1px;background:var(--line);
  }
  .step{position:relative;padding-left:66px;padding-bottom:34px;}
  .step:last-child{padding-bottom:0;}
  .step-num{
    position:absolute;left:0;top:0;width:48px;height:48px;border-radius:50%;
    background:var(--surface);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
    font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;font-weight:600;font-size:14px;color:var(--ink);
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .step:hover .step-num{border-color:var(--accent);box-shadow:0 0 0 4px rgba(198,242,78,.28);}
  .step-title{font-size:19px;font-weight:600;color:var(--ink);margin-bottom:6px;}
  .step-text{color:var(--muted);font-size:15px;max-width:620px;}
  .track-aside{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    overflow:hidden;box-shadow:var(--shadow-1);
  }
  @media (min-width:1024px){.track-aside{position:sticky;top:96px;}}
  .track-aside img{width:100%;aspect-ratio:16/10;object-fit:cover;}
  .track-aside-body{padding:22px 24px 26px;}
  .track-aside-body h3{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:8px;}
  .track-aside-body p{font-size:14.5px;color:var(--muted);}
  .aside-tag{
    display:inline-block;font-size:12px;color:var(--muted);background:var(--mist);
    border-radius:var(--radius-pill);padding:4px 12px;margin-bottom:12px;
  }

  /* 问题卡片 */
  .issue-grid{display:grid;grid-template-columns:1fr;gap:22px;margin-top:34px;}
  @media (min-width:900px){.issue-grid{grid-template-columns:repeat(3,1fr);}}
  .issue-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    overflow:hidden;display:flex;flex-direction:column;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  }
  .issue-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(198,242,78,.6);}
  .issue-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s var(--ease);}
  .issue-card:hover img{transform:scale(1.02);}
  .issue-body{padding:24px 24px 28px;display:flex;flex-direction:column;gap:10px;}
  .issue-kicker{
    font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
    font-size:12px;letter-spacing:.12em;color:var(--muted);
  }
  .issue-title{font-size:19px;font-weight:600;color:var(--ink);line-height:1.45;}
  .issue-text{font-size:14.8px;color:var(--muted);}
  .issue-wide{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:30px 28px;}
  @media (min-width:900px){.issue-wide{grid-column:1 / -1;display:grid;grid-template-columns:280px minmax(0,1fr);gap:32px;align-items:center;}}

  /* 数据条 */
  .stats{
    margin-top:32px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:32px 24px;display:grid;grid-template-columns:repeat(2,1fr);gap:28px 20px;box-shadow:var(--shadow-1);
  }
  @media (min-width:900px){.stats{grid-template-columns:repeat(4,1fr);padding:44px 40px;}}
  .stat{display:flex;flex-direction:column;gap:6px;}
  .stat-num{
    font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;
    font-size:clamp(30px,4vw,44px);font-weight:700;color:var(--ink);line-height:1;
  }
  .stat-unit{font-size:13px;color:var(--muted);letter-spacing:.08em;}
  .stat-label{font-size:14.5px;color:var(--text);}

  /* FAQ */
  .faq-list{margin-top:30px;padding-left:16px;}
  .faq-item{position:relative;border-bottom:1px solid var(--line);}
  .faq-item:first-child{border-top:1px solid var(--line);}
  .faq-item::before{
    content:"";position:absolute;left:-16px;top:22px;bottom:22px;width:3px;border-radius:2px;
    background:var(--accent);transform:scaleY(0);transform-origin:top;transition:transform .24s var(--ease);
  }
  .faq-item.is-open::before{transform:scaleY(1);}
  .faq-q{
    width:100%;display:flex;align-items:flex-start;gap:16px;padding:20px 0;
    background:none;border:0;text-align:left;cursor:pointer;color:var(--ink);
    font-size:18px;font-weight:600;line-height:1.6;
  }
  .faq-idx{font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;color:var(--muted);font-weight:500;font-size:15px;padding-top:3px;}
  .faq-icon{
    margin-left:auto;flex:0 0 22px;width:22px;height:22px;position:relative;margin-top:4px;
    transition:transform .24s var(--ease);color:var(--muted);
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:currentColor;border-radius:2px;
  }
  .faq-icon::before{left:4px;right:4px;top:10px;height:1.6px;}
  .faq-icon::after{top:4px;bottom:4px;left:10px;width:1.6px;}
  .faq-item.is-open .faq-icon{transform:rotate(135deg);color:var(--ink);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease);}
  .faq-a-inner{padding:0 0 22px 34px;color:var(--muted);font-size:15.5px;max-width:760px;}

  /* CTA 通栏 */
  .cta-band{
    position:relative;isolation:isolate;overflow:hidden;background:var(--ink);color:var(--dark-text);
    border-radius:24px;padding:44px 28px;
  }
  @media (min-width:900px){.cta-band{padding:64px 56px;}}
  .cta-band img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;opacity:.32;}
  .cta-band::before{
    content:"";position:absolute;inset:0;z-index:-1;
    background:linear-gradient(115deg,rgba(15,26,22,.95),rgba(15,26,22,.7));
  }
  .cta-title{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.015em;line-height:1.28;max-width:640px;}
  .cta-text{margin-top:14px;color:var(--dark-muted);max-width:600px;font-size:15.5px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}

  /* 浮动 CTA */
  .float-cta{
    position:fixed;right:24px;bottom:24px;z-index:45;
    display:flex;align-items:center;gap:14px;
    background:var(--ink);color:var(--dark-text);
    border-radius:var(--radius-pill);padding:10px 12px 10px 20px;
    box-shadow:var(--shadow-3);opacity:0;transform:translateY(16px);pointer-events:none;
    transition:opacity .24s var(--ease),transform .24s var(--ease);
  }
  .float-cta.is-visible{opacity:.94;transform:none;pointer-events:auto;}
  .float-cta:hover{opacity:1;}
  .float-cta p{font-size:14px;margin:0;white-space:nowrap;}
  .float-cta .float-btn{
    display:inline-flex;align-items:center;padding:9px 18px;border-radius:var(--radius-pill);
    background:var(--accent);color:var(--ink);font-size:14px;font-weight:600;
  }
  .float-close{
    width:26px;height:26px;border-radius:50%;border:1px solid rgba(242,245,238,.28);
    background:transparent;color:var(--dark-muted);font-size:14px;line-height:1;cursor:pointer;
  }
  @media (max-width:767px){
    .float-cta{
      left:12px;right:12px;bottom:12px;border-radius:18px;justify-content:space-between;
      padding:10px 12px 10px 16px;
    }
    .float-cta p{white-space:normal;font-size:13.5px;}
  }

  /* 页脚 */
  .site-footer{background:var(--ink);color:var(--dark-text);padding:64px 0 28px;margin-top:0;}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:36px;}
  @media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:40px;}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.7fr 1fr 1fr 1fr;gap:48px;}}
  .footer-brand{display:flex;align-items:center;gap:10px;font-size:19px;color:var(--dark-text);}
  .footer-brand .logo-mark{font-weight:700;}
  .footer-brand .logo-sep{width:1px;height:18px;background:rgba(242,245,238,.28);display:inline-block;}
  .footer-brand .logo-sub{color:var(--dark-muted);font-size:17px;}
  .footer-desc{margin-top:16px;color:var(--dark-muted);font-size:14px;line-height:1.9;max-width:420px;}
  .footer-col h3{font-size:15px;font-weight:600;color:var(--dark-text);margin-bottom:16px;}
  .footer-links{display:flex;flex-direction:column;gap:11px;}
  .footer-links a{color:var(--dark-muted);font-size:14px;transition:color .18s var(--ease);}
  .footer-links a:hover{color:var(--accent);}
  .footer-bottom{
    margin-top:48px;padding-top:20px;border-top:1px solid rgba(242,245,238,.14);
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    color:var(--dark-muted);font-size:13px;
  }

  /* 动效 */
  .reveal{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
  .reveal.is-in{opacity:1;transform:none;}
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    .reveal{opacity:1;transform:none;transition:none;}
    .btn,.nav-cta,.chip,.issue-card img,.float-cta{transition:none;}
  }