/* roulang page: index */
:root{
  --ink-950:#0C1512;
  --ink-800:#16241F;
  --ink-600:#3A4A44;
  --ink-400:#7C8A84;
  --sand-50:#F5F3EC;
  --sand-100:#EBE7DC;
  --lime-400:#C8F04B;
  --lime-300:#DCF98A;
  --ember-500:#FF5A2B;
  --hairline:rgba(12,21,18,0.10);
  --hairline-light:rgba(245,243,236,0.18);
  --r-sm:4px;
  --r-card:10px;
  --r-media:16px;
  --shadow-soft:0 8px 24px rgba(12,21,18,0.10);
  --sidebar:264px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--sand-50);
  color:var(--ink-950);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
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;}
p{margin:0;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.15;letter-spacing:-0.02em;}
:focus-visible{outline:2px solid var(--ink-950);outline-offset:3px;border-radius:2px;}

/* ---------- 布局骨架 ---------- */
.shell{margin-left:var(--sidebar);min-height:100vh;display:flex;flex-direction:column;}
main{flex:1 1 auto;padding-bottom:104px;}
.wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 clamp(20px,3vw,40px);}
.sec{padding:clamp(56px,7vw,110px) 0;}
.sec-tight{padding:clamp(44px,5vw,80px) 0;}
.hairline-top{border-top:1px solid var(--hairline);}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:clamp(28px,3vw,48px);}
.sec-head h2{font-size:clamp(1.75rem,3vw,2.5rem);line-height:1.15;letter-spacing:-0.02em;}
.sec-lede{margin-top:12px;color:var(--ink-600);font-size:16px;max-width:640px;}

/* ---------- 左侧竖向导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar);
  background:var(--ink-950);color:var(--sand-50);
  display:flex;flex-direction:column;padding:32px 24px 22px;z-index:60;
  border-right:1px solid rgba(245,243,236,0.08);
}
.brand{display:flex;gap:12px;align-items:flex-start;}
.brand-mark{width:38px;height:38px;flex:0 0 38px;}
.brand-name{font-size:15px;font-weight:700;line-height:1.4;color:#FFFFFF;letter-spacing:-0.01em;}
.brand-sub{display:block;margin-top:4px;font-size:11px;letter-spacing:0.08em;color:rgba(245,243,236,0.45);font-weight:400;}
.side-nav{margin-top:40px;display:flex;flex-direction:column;}
.side-label{font-size:11px;letter-spacing:0.1em;color:rgba(245,243,236,0.42);margin-bottom:10px;}
.nav-link{position:relative;display:block;padding:11px 0 11px 16px;font-size:15px;color:rgba(245,243,236,0.74);transition:color .24s var(--ease);}
.nav-link::before{content:"";position:absolute;left:0;top:50%;width:3px;height:0;background:var(--lime-400);transform:translateY(-50%);transition:height .24s var(--ease);}
.nav-link:hover{color:var(--lime-400);}
.nav-link:hover::before{height:58%;}
.nav-link.is-active{color:var(--lime-400);font-weight:600;}
.nav-link.is-active::before{height:100%;}
.nav-sub{display:block;padding:7px 0 7px 16px;font-size:13px;color:rgba(245,243,236,0.5);border-left:1px solid rgba(245,243,236,0.12);transition:color .2s var(--ease),border-color .2s var(--ease);}
.nav-sub:hover{color:var(--lime-300);border-color:var(--lime-400);}
.side-foot{margin-top:auto;padding-top:24px;border-top:1px solid var(--hairline-light);}
.side-cta{width:100%;justify-content:center;}
.side-note{margin-top:14px;font-size:11px;line-height:1.6;color:rgba(245,243,236,0.42);}

/* ---------- 移动端顶部导航 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
  align-items:center;justify-content:space-between;padding:0 18px;
  background:rgba(245,243,236,0.9);backdrop-filter:blur(8px);border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.topbar.is-scrolled{border-bottom-color:var(--hairline);background:rgba(245,243,236,0.94);}
.topbar-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:700;letter-spacing:-0.01em;}
.topbar-brand svg{width:28px;height:28px;flex:0 0 28px;}
.burger{width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;align-items:flex-end;gap:5px;}
.burger span{display:block;width:22px;height:2px;background:var(--ink-950);transition:transform .25s var(--ease),opacity .2s var(--ease);}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.drawer{
  position:fixed;inset:0;background:var(--ink-950);color:var(--sand-50);z-index:65;
  transform:translateY(-100%);transition:transform .35s var(--ease);
  padding:88px 24px 32px;display:flex;flex-direction:column;overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);}
.drawer a.drawer-link{display:block;padding:16px 0;font-size:22px;font-weight:700;border-bottom:1px solid var(--hairline-light);color:var(--sand-50);}
.drawer a.drawer-link.is-active{color:var(--lime-400);}
.drawer .drawer-sub{display:block;padding:12px 0;font-size:15px;color:rgba(245,243,236,0.6);}
.drawer-foot{margin-top:auto;padding-top:28px;}

/* ---------- 按钮体系 ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;height:50px;padding:0 28px;border-radius:var(--r-sm);font-size:15px;font-weight:600;line-height:1;transition:background .16s ease-out,color .16s ease-out,border-color .16s ease-out,transform .16s ease-out;white-space:nowrap;}
.btn:active{transform:scale(0.98);}
.btn-primary{background:var(--lime-400);color:var(--ink-950);}
.btn-primary:hover{background:var(--ink-950);color:var(--lime-400);}
.btn-primary .arw{transition:transform .16s ease-out;}
.btn-primary:hover .arw{transform:translateX(4px);}
.btn-ghost{background:transparent;border:1px solid var(--hairline);color:var(--ink-950);}
.btn-ghost:hover{border-color:var(--ink-950);background:var(--sand-100);}
.btn-onDark{border-color:rgba(245,243,236,0.28);color:var(--sand-50);background:transparent;}
.btn-onDark:hover{background:var(--lime-400);color:var(--ink-950);border-color:var(--lime-400);}
.btn-text{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink-950);position:relative;padding-bottom:4px;}
.btn-text::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--lime-400);transition:width .26s var(--ease);}
.btn-text:hover::after{width:100%;}
.btn-text .arw{transition:transform .2s var(--ease);}
.btn-text:hover .arw{transform:translateX(3px);}

/* ---------- 标签 / 徽章 ---------- */
.tag-line{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:0.08em;color:var(--ink-600);}
.tag-line::before{content:"";width:22px;height:2px;background:var(--lime-400);display:block;}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-sm);font-size:12px;line-height:1;letter-spacing:0.02em;}
.badge-ember{color:var(--ember-500);border:1px solid rgba(255,90,43,0.4);background:rgba(255,90,43,0.06);}
.badge-ink{border:1px solid var(--hairline);color:var(--ink-600);}
.badge-onDark{border:1px solid var(--hairline-light);color:rgba(245,243,236,0.72);}

/* ---------- 图片位 ---------- */
.media{position:relative;overflow:hidden;border-radius:var(--r-media);background:var(--ink-800);}
.media img{width:100%;height:100%;object-fit:cover;filter:contrast(1.06) saturate(1.02);transition:transform .3s var(--ease);}
.media::after{content:"";position:absolute;inset:0;background:rgba(12,21,18,0.16);pointer-events:none;}
.ratio-16-9{aspect-ratio:16/9;}
.ratio-16-10{aspect-ratio:16/10;}
.ratio-5-4{aspect-ratio:5/4;}
.ratio-3-4{aspect-ratio:3/4;}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:86vh;display:flex;align-items:center;padding:clamp(52px,6vw,88px) 0 clamp(48px,5vw,80px);overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    linear-gradient(90deg,rgba(245,243,236,0.96) 0%,rgba(245,243,236,0.88) 46%,rgba(245,243,236,0.55) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.hero .wrap{position:relative;z-index:1;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:clamp(24px,4vw,56px);align-items:center;}
.hero h1{font-size:clamp(2.4rem,5vw,4.25rem);font-weight:800;line-height:1.05;letter-spacing:-0.03em;}
.hero h1 .hl{position:relative;display:inline-block;}
.hero h1 .hl::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:12px;background:var(--lime-400);opacity:.55;z-index:-1;}
.hero-sub{margin-top:22px;font-size:17px;line-height:1.7;color:var(--ink-600);max-width:560px;}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;align-items:center;gap:14px 26px;}
.hero-trust{margin-top:34px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;font-size:12.5px;color:var(--ink-400);}
.hero-trust span{display:inline-flex;align-items:center;}
.hero-trust span+span::before{content:"";width:1px;height:12px;background:var(--hairline);margin-right:14px;}
.hero-visual{position:relative;padding:0 0 34px 26px;}
.hero-main{aspect-ratio:5/4;border-radius:var(--r-media);}
.hero-sub-card{position:absolute;left:0;bottom:0;width:46%;border-radius:var(--r-card);border:5px solid var(--sand-50);box-shadow:var(--shadow-soft);overflow:hidden;}
.hero-sub-card .ratio-16-10{border-radius:0;}
.hero-badge{
  position:absolute;top:18px;right:-6px;background:rgba(12,21,18,0.9);color:var(--sand-50);
  padding:10px 14px;border-radius:var(--r-sm);font-size:12px;line-height:1.5;letter-spacing:0.02em;
}
.hero-badge b{display:block;color:var(--lime-400);font-size:19px;font-weight:800;line-height:1.2;}

/* ---------- 编号三连 ---------- */
.trio{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--hairline);}
.trio-item{padding:34px 34px 8px 0;position:relative;}
.trio-item+.trio-item{padding-left:34px;border-left:1px solid var(--hairline);}
.trio-num{font-size:48px;font-weight:800;line-height:1;letter-spacing:-0.03em;color:transparent;-webkit-text-stroke:1px var(--ink-400);}
.trio-item h3{margin-top:18px;font-size:1.25rem;}
.trio-item p{margin-top:12px;color:var(--ink-600);font-size:15.5px;line-height:1.75;max-width:340px;}

/* ---------- 场景图文 ---------- */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,64px);align-items:center;padding:clamp(36px,4vw,58px) 0;border-top:1px solid var(--hairline);}
.scene:first-of-type{border-top:0;padding-top:0;}
.scene.rev .scene-media{order:2;}
.scene h3{font-size:clamp(1.35rem,2.2vw,1.75rem);}
.scene p{margin-top:14px;color:var(--ink-600);font-size:15.5px;}
.points{margin-top:22px;display:grid;gap:12px;}
.points li{display:flex;gap:12px;font-size:15px;color:var(--ink-600);}
.points li::before{content:"";flex:0 0 8px;width:8px;height:8px;margin-top:9px;background:var(--lime-400);}

/* ---------- 资讯卡 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{display:flex;flex-direction:column;border:1px solid var(--hairline);border-radius:var(--r-card);background:var(--sand-50);overflow:hidden;transition:transform .3s var(--ease),border-color .3s var(--ease);}
.news-card:hover{transform:translateY(-4px);border-color:var(--ink-950);}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-card:active{transform:scale(0.995);}
.news-cover{aspect-ratio:16/9;overflow:hidden;position:relative;background:var(--ink-800);}
.news-cover img{width:100%;height:100%;object-fit:cover;filter:contrast(1.06);transition:transform .3s var(--ease);}
.news-cover::after{content:"";position:absolute;inset:0;background:rgba(12,21,18,0.16);}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-title{font-size:17px;line-height:1.5;font-weight:700;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card:hover .news-title{text-decoration:underline;text-decoration-color:var(--lime-400);text-decoration-thickness:2px;text-underline-offset:4px;}
.news-sum{font-size:14.5px;line-height:1.7;color:var(--ink-600);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--hairline);display:flex;flex-wrap:wrap;gap:8px 14px;font-size:12px;color:var(--ink-400);}
.empty-box{border:1px dashed var(--hairline);border-radius:var(--r-card);padding:52px 24px;text-align:center;color:var(--ink-600);}
.empty-box svg{width:40px;height:40px;margin:0 auto 16px;display:block;color:var(--ink-400);}
.empty-box p{font-size:15px;}
.empty-box .btn{margin-top:20px;}

/* ---------- 社会认同 ---------- */
.trust{background:var(--ink-950);color:var(--sand-50);padding:clamp(56px,6vw,96px) 0;}
.trust .wrap{max-width:1280px;}
.trust-title{font-size:12px;letter-spacing:0.08em;color:rgba(245,243,236,0.55);}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:26px;padding-bottom:44px;border-bottom:1px solid var(--hairline-light);}
.stat-num{font-size:clamp(2rem,3.4vw,2.9rem);font-weight:800;line-height:1.05;color:var(--lime-400);letter-spacing:-0.03em;}
.stat-label{margin-top:10px;font-size:12.5px;color:rgba(245,243,236,0.72);}
.scroll-x{margin-top:40px;display:flex;gap:20px;overflow-x:auto;padding-bottom:6px;scroll-snap-type:x mandatory;scrollbar-width:none;-ms-overflow-style:none;}
.scroll-x::-webkit-scrollbar{display:none;}
.quote-card{flex:0 0 min(78%,380px);scroll-snap-align:start;background:var(--sand-50);color:var(--ink-950);border-radius:var(--r-card);padding:24px;}
.quote-card p{font-size:15px;line-height:1.75;}
.quote-who{margin-top:16px;padding-top:14px;border-top:1px solid var(--hairline);font-size:12.5px;color:var(--ink-400);display:flex;justify-content:space-between;gap:10px;}
.scroll-btns{margin-top:20px;display:flex;gap:10px;}
.scroll-btn{width:44px;height:44px;border:1px solid var(--hairline-light);border-radius:var(--r-sm);color:var(--sand-50);display:inline-flex;align-items:center;justify-content:center;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);}
.scroll-btn:hover{background:var(--lime-400);color:var(--ink-950);border-color:var(--lime-400);}

/* ---------- FAQ ---------- */
.faq{max-width:880px;}
.faq-item{border-bottom:1px solid var(--hairline);}
.faq-item:first-child{border-top:1px solid var(--hairline);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;padding:22px 12px;font-size:16.5px;font-weight:600;transition:background .2s var(--ease);}
.faq-q:hover{background:var(--sand-100);}
.faq-mark{position:relative;flex:0 0 18px;width:18px;height:18px;}
.faq-mark::before,.faq-mark::after{content:"";position:absolute;background:var(--ink-950);transition:transform .25s var(--ease),opacity .2s var(--ease);}
.faq-mark::before{left:0;top:8px;width:18px;height:2px;}
.faq-mark::after{top:0;left:8px;width:2px;height:18px;}
.faq-item.is-open .faq-mark::after{transform:scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
.faq-a-inner{padding:0 12px 26px;color:var(--ink-600);font-size:15.5px;line-height:1.8;max-width:720px;}

/* ---------- CTA 通栏 ---------- */
.cta-band{background:var(--sand-100);border-top:1px solid var(--hairline);padding:clamp(40px,4.5vw,64px) 0;}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;}
.cta-inner h2{font-size:clamp(1.5rem,2.6vw,2.1rem);}
.cta-inner p{margin-top:10px;color:var(--ink-600);font-size:15.5px;max-width:600px;}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--ink-950);color:rgba(245,243,236,0.72);padding:clamp(48px,5vw,72px) 0 32px;}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px;}
.foot-brand{color:var(--sand-50);font-size:16px;font-weight:700;display:flex;align-items:center;gap:10px;}
.foot-brand svg{width:30px;height:30px;}
.foot-desc{margin-top:16px;font-size:14px;line-height:1.8;max-width:380px;}
.foot-title{color:var(--sand-50);font-size:13px;letter-spacing:0.06em;margin-bottom:14px;}
.foot-list li{margin-bottom:10px;font-size:14px;}
.foot-list a{transition:color .2s var(--ease);}
.foot-list a:hover{color:var(--lime-400);}
.foot-bottom{margin-top:44px;padding-top:22px;border-top:1px solid var(--hairline-light);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:12.5px;color:rgba(245,243,236,0.5);}

/* ---------- 底部固定转化条 ---------- */
.cta-bar{
  position:fixed;left:var(--sidebar);right:0;bottom:0;height:64px;z-index:55;
  background:var(--sand-50);border-top:1px solid var(--hairline);box-shadow:var(--shadow-soft);
  display:flex;align-items:center;gap:18px;padding:0 clamp(20px,3vw,40px);
  transform:translateY(110%);transition:transform .4s var(--ease);
}
.cta-bar.is-in{transform:translateY(0);}
.cta-bar p{font-size:14px;font-weight:600;color:var(--ink-950);}
.cta-bar .spacer{flex:1;}
.cta-bar .btn{height:42px;padding:0 20px;font-size:14px;}
.cta-close{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;color:var(--ink-400);border-radius:var(--r-sm);transition:color .2s var(--ease),background .2s var(--ease);}
.cta-close:hover{color:var(--ink-950);background:var(--sand-100);}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s var(--ease),transform .48s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .news-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1023px){
  .sidebar{display:none;}
  .topbar{display:flex;}
  .shell{margin-left:0;padding-top:64px;}
  .cta-bar{left:0;height:60px;padding:0 16px;gap:10px;}
  .cta-bar p{font-size:13px;}
  .hero-grid{grid-template-columns:1fr;}
  .hero{min-height:auto;padding-top:44px;}
  .hero::before{background:linear-gradient(180deg,rgba(245,243,236,0.96) 0%,rgba(245,243,236,0.86) 60%,rgba(245,243,236,0.7) 100%),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;}
  .hero-visual{padding:0 0 30px 20px;max-width:560px;}
  .trio{grid-template-columns:1fr;}
  .trio-item{padding:28px 0 4px;}
  .trio-item+.trio-item{padding-left:0;border-left:0;border-top:1px solid var(--hairline);}
  .trio-item p{max-width:none;}
  .scene{grid-template-columns:1fr;gap:24px;}
  .scene.rev .scene-media{order:0;}
  .stats{grid-template-columns:repeat(2,1fr);gap:28px;}
  .foot-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .news-grid{grid-template-columns:1fr;}
  .hero-sub{font-size:16px;}
  .hero-trust{gap:8px 12px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-bar .btn-text{display:none;}
}
@media (max-width:520px){
  .stats{grid-template-columns:1fr 1fr;}
  .foot-grid{grid-template-columns:1fr;}
  .hero-visual{padding-left:0;}
  .hero-sub-card{position:relative;width:100%;left:0;bottom:0;border-width:0;margin-top:16px;box-shadow:none;}
  .hero-badge{right:10px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:opacity .2s linear;}
  .hero-main img,.media img,.news-cover img{transition:none;}
  .cta-bar{transition:opacity .2s linear;transform:none;}
}

/* roulang page: article */
:root{
    --ink-950:#0C1512;
    --ink-800:#16241F;
    --ink-600:#3A4A44;
    --ink-400:#7C8A84;
    --sand-50:#F5F3EC;
    --sand-100:#EBE7DC;
    --lime-400:#C8F04B;
    --lime-300:#DCF98A;
    --ember-500:#FF5A2B;
    --hairline:rgba(12,21,18,0.10);
    --hairline-dark:rgba(245,243,236,0.14);
    --radius-xs:4px;
    --radius-card:10px;
    --radius-hero:16px;
    --shadow-bar:0 8px 24px rgba(12,21,18,0.10);
    --nav-w:264px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","Source Han Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    font-size:16px;line-height:1.75;
    color:var(--ink-800);
    background:var(--sand-50);
    font-variant-numeric:tabular-nums;
    -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}
  :focus-visible{outline:2px solid var(--ink-950);outline-offset:2px;border-radius:2px}
  .side :focus-visible,.site-foot :focus-visible{outline-color:var(--lime-400)}
  .wrap{max-width:1280px;margin:0 auto;padding:0 24px}

  /* ============ 左侧竖向导航 ============ */
  .side{
    position:fixed;top:0;left:0;width:var(--nav-w);height:100vh;
    background:var(--ink-950);color:var(--sand-50);
    display:flex;flex-direction:column;
    padding:26px 20px 22px;z-index:80;overflow-y:auto;
  }
  .side-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
  .brand{display:flex;align-items:center;gap:10px;min-width:0}
  .brand svg{width:34px;height:34px;flex:none}
  .brand-text{
    font-size:15px;font-weight:700;line-height:1.3;letter-spacing:.01em;
    color:var(--sand-50);
  }
  .burger{
    display:none;width:44px;height:44px;flex:none;
    flex-direction:column;align-items:center;justify-content:center;gap:5px;
    border:1px solid var(--hairline-dark);border-radius:var(--radius-xs);
  }
  .burger span{display:block;width:18px;height:2px;background:var(--sand-50);transition:transform .24s ease,opacity .24s ease}
  .side.is-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .side.is-open .burger span:nth-child(2){opacity:0}
  .side.is-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  .side-nav{margin-top:36px;display:flex;flex-direction:column;gap:2px}
  .side-label{
    font-size:12px;letter-spacing:.08em;color:rgba(245,243,236,.48);
    padding:0 12px;margin-bottom:10px;
  }
  .side-label.mt-label{margin-top:26px}
  .nav-link{
    position:relative;display:block;
    padding:11px 12px 11px 16px;border-radius:var(--radius-xs);
    font-size:15px;color:rgba(245,243,236,.78);
    transition:color .24s ease,background .24s ease;
  }
  .nav-link::before{
    content:"";position:absolute;left:0;top:50%;width:3px;height:0;
    background:var(--lime-400);transform:translateY(-50%);
    transition:height .24s cubic-bezier(.22,1,.36,1);
  }
  .nav-link:hover{color:var(--lime-400);background:rgba(245,243,236,.05)}
  .nav-link:hover::before{height:64%}
  .nav-link.is-active{color:var(--lime-400);font-weight:600}
  .nav-link.is-active::before{height:64%}
  .nav-sub{
    display:block;padding:8px 12px 8px 16px;
    font-size:13.5px;color:rgba(245,243,236,.58);
    border-radius:var(--radius-xs);transition:color .2s ease,background .2s ease;
  }
  .nav-sub:hover{color:var(--sand-50);background:rgba(245,243,236,.05)}

  .side-foot{margin-top:auto;padding-top:26px;border-top:1px solid var(--hairline-dark)}
  .side-note{margin:12px 0 0;font-size:12px;line-height:1.6;color:rgba(245,243,236,.45)}

  /* ============ 按钮体系 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:50px;padding:0 26px;border-radius:var(--radius-xs);
    font-size:15px;font-weight:600;white-space:nowrap;
    transition:background .16s ease,color .16s ease,border-color .16s ease,transform .12s ease;
  }
  .btn:active{transform:scale(.98)}
  .btn-primary{background:var(--lime-400);color:var(--ink-950)}
  .btn-primary:hover{background:var(--ink-950);color:var(--lime-400)}
  .btn-primary:hover .arrow{transform:translateX(4px)}
  .btn-ghost{background:transparent;border:1px solid var(--hairline);color:var(--ink-950)}
  .btn-ghost:hover{border-color:var(--ink-950);background:var(--sand-100)}
  .btn-block{width:100%}
  .arrow{display:inline-block;transition:transform .16s ease-out}
  .tlink{
    position:relative;display:inline-flex;align-items:center;gap:6px;
    font-weight:600;color:var(--ink-950);padding-bottom:3px;
  }
  .tlink::after{
    content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;
    background:var(--lime-400);transform:scaleX(0);transform-origin:left;
    transition:transform .26s ease;
  }
  .tlink:hover::after{transform:scaleX(1)}

  /* ============ 页面骨架 ============ */
  .page{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column;padding-bottom:88px}
  .page-main{flex:1;padding:36px 0 40px}

  /* ============ 面包屑 ============ */
  .crumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--ink-400);margin-bottom:26px;
  }
  .crumb a{color:var(--ink-600);transition:color .2s ease}
  .crumb a:hover{color:var(--ink-950);text-decoration:underline;text-decoration-color:var(--lime-400);text-underline-offset:4px}
  .crumb .sep{color:rgba(12,21,18,.22)}
  .crumb .now{color:var(--ink-400)}

  /* ============ 文章布局 ============ */
  .article-wrap{
    max-width:1200px;margin:0 auto;padding:0 24px;
    display:grid;grid-template-columns:minmax(0,1fr);gap:48px;justify-content:center;
  }
  @media (min-width:1280px){
    .article-wrap{grid-template-columns:minmax(0,1fr) 240px}
  }
  .article{max-width:820px;width:100%;margin:0 auto}
  @media (min-width:1280px){
    .article{margin:0}
  }

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12px;letter-spacing:.08em;
    color:var(--ember-500);background:rgba(255,90,43,.06);
    border:1px solid rgba(255,90,43,.32);border-radius:var(--radius-xs);
    padding:4px 10px;line-height:1.4;
  }
  .article-title{
    font-size:clamp(1.9rem,3.4vw,3rem);
    font-weight:800;line-height:1.15;letter-spacing:-.03em;
    color:var(--ink-950);margin:18px 0 20px;
  }
  .article-head{border-bottom:1px solid var(--hairline);padding-bottom:26px;margin-bottom:34px}
  .meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-400)}
  .meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(12,21,18,.22)}

  .hero-media{
    position:relative;border-radius:var(--radius-hero);overflow:hidden;
    border:1px solid var(--hairline);margin-bottom:38px;
  }
  .hero-media img{width:100%;height:clamp(200px,32vw,380px);object-fit:cover;filter:contrast(1.05) saturate(1.03)}
  .hero-media::after{content:"";position:absolute;inset:0;background:rgba(12,21,18,.16);pointer-events:none}

  /* ============ 正文排版 ============ */
  .article-body{font-size:17px;line-height:1.85;color:var(--ink-800)}
  .article-body > *:first-child{margin-top:0}
  .article-body p{margin:0 0 1.2em}
  .article-body a{color:var(--ink-950);border-bottom:1px solid var(--lime-400);transition:background .2s ease}
  .article-body a:hover{background:rgba(200,240,75,.35)}
  .article-body h2{
    position:relative;font-size:clamp(1.35rem,2.2vw,1.7rem);font-weight:700;
    line-height:1.3;letter-spacing:-.02em;color:var(--ink-950);
    margin:48px 0 16px;padding-left:16px;
  }
  .article-body h2::before{content:"";position:absolute;left:0;top:.28em;height:1em;width:2px;background:var(--lime-400)}
  .article-body h3{font-size:1.2rem;font-weight:600;color:var(--ink-950);margin:32px 0 12px;line-height:1.4}
  .article-body blockquote{
    margin:28px 0;padding:18px 24px;background:var(--sand-100);
    border-left:4px solid var(--lime-400);border-radius:0 var(--radius-card) var(--radius-card) 0;
    color:var(--ink-800);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body ul,.article-body ol{margin:0 0 1.2em;list-style:none}
  .article-body ul li{position:relative;padding-left:24px;margin-bottom:.55em}
  .article-body ul li::before{content:"";position:absolute;left:2px;top:.62em;width:8px;height:8px;background:var(--lime-400)}
  .article-body ol{counter-reset:olc}
  .article-body ol li{position:relative;padding-left:36px;margin-bottom:.55em;counter-increment:olc}
  .article-body ol li::before{
    content:counter(olc,decimal-leading-zero);position:absolute;left:0;top:.2em;
    font-size:13px;font-weight:700;color:var(--ink-400);
  }
  .article-body img{border-radius:var(--radius-hero);border:1px solid var(--hairline);margin:28px auto;filter:contrast(1.04)}
  .article-body figure{margin:28px 0}
  .article-body figure img{margin-bottom:10px}
  .article-body figcaption{font-size:12px;color:var(--ink-400);text-align:center;line-height:1.6}
  .article-body table{width:100%;border-collapse:collapse;margin:28px 0;font-size:15px}
  .article-body th,.article-body td{border-bottom:1px solid var(--hairline);padding:12px 14px;text-align:left}
  .article-body th{background:var(--sand-100);font-weight:600;color:var(--ink-950)}
  .article-body hr{border:0;border-top:1px solid var(--hairline);margin:40px 0}
  .article-body strong{color:var(--ink-950)}

  .empty-box{
    border:1px dashed rgba(12,21,18,.20);border-radius:var(--radius-card);
    padding:56px 24px;text-align:center;
  }
  .empty-box p{margin:0 0 18px;font-size:17px;font-weight:600;color:var(--ink-950)}

  /* ============ 浮动目录 ============ */
  .toc{display:none}
  @media (min-width:1280px){.toc{display:block}}
  .toc-inner{position:sticky;top:36px;border-left:1px solid var(--hairline);padding-left:20px}
  .toc-title{font-size:12px;letter-spacing:.08em;color:var(--ink-400);margin-bottom:14px}
  .toc a{
    position:relative;display:block;font-size:13px;line-height:1.55;
    color:var(--ink-600);padding:6px 0 6px 12px;transition:color .2s ease;
  }
  .toc a::before{content:"";position:absolute;left:-21px;top:0;bottom:0;width:2px;background:transparent;transition:background .2s ease}
  .toc a:hover{color:var(--ink-950)}
  .toc a.is-active{color:var(--ink-950);font-weight:600}
  .toc a.is-active::before{background:var(--lime-400)}

  /* ============ 文末导航 ============ */
  .end-nav{
    display:grid;grid-template-columns:1fr;gap:16px;
    margin-top:56px;padding-top:32px;border-top:1px solid var(--hairline);
  }
  @media (min-width:640px){.end-nav{grid-template-columns:1fr 1fr}}
  .end-card{
    display:block;border:1px solid var(--hairline);border-radius:var(--radius-card);
    background:var(--sand-50);padding:20px 22px;
    transition:transform .3s cubic-bezier(.22,1,.36,1),border-color .3s ease;
  }
  .end-card:hover{transform:translateY(-4px);border-color:var(--ink-950)}
  .end-card span{display:block;font-size:12px;letter-spacing:.08em;color:var(--ink-400);margin-bottom:8px}
  .end-card strong{display:block;font-size:16.5px;font-weight:700;color:var(--ink-950);margin-bottom:6px}
  .end-card em{display:block;font-style:normal;font-size:13.5px;color:var(--ink-600);line-height:1.6}
  .back-row{display:flex;flex-wrap:wrap;gap:22px;margin-top:26px}

  /* ============ 常见问题 ============ */
  .faq-block{margin-top:64px;padding-top:40px;border-top:1px solid var(--hairline)}
  .faq-block h2{
    font-size:clamp(1.4rem,2.4vw,1.9rem);font-weight:700;letter-spacing:-.02em;
    color:var(--ink-950);margin:0 0 8px;
  }
  .faq-block .faq-lead{margin:0 0 24px;font-size:15px;color:var(--ink-600)}
  .faq-item{border-bottom:1px solid var(--hairline)}
  .faq-item summary{
    list-style:none;cursor:pointer;position:relative;
    padding:20px 44px 20px 0;font-size:16.5px;font-weight:600;color:var(--ink-950);
    transition:color .2s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::before{
    content:"";position:absolute;right:16px;top:50%;width:2px;height:12px;
    background:var(--ink-950);transform:translateY(-50%);transition:transform .28s ease,opacity .28s ease;
  }
  .faq-item summary::after{
    content:"";position:absolute;right:11px;top:50%;width:12px;height:2px;
    background:var(--ink-950);transform:translateY(-50%);
  }
  .faq-item[open] summary::before{opacity:0;transform:translateY(-50%) rotate(90deg)}
  .faq-item summary:hover{color:var(--ink-800)}
  .faq-body{padding:0 44px 22px 0;font-size:16px;line-height:1.8;color:var(--ink-600)}

  /* ============ 页脚 ============ */
  .site-foot{background:var(--ink-950);color:var(--sand-50);padding:64px 0 28px;margin-top:72px}
  .foot-grid{display:grid;grid-template-columns:1fr;gap:36px}
  @media (min-width:768px){.foot-grid{grid-template-columns:1.6fr 1fr 1fr}}
  .foot-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.01em}
  .foot-brand svg{width:36px;height:36px;flex:none}
  .foot-desc{margin:16px 0 0;font-size:14px;line-height:1.8;color:rgba(245,243,236,.72);max-width:420px}
  .foot-title{font-size:12px;letter-spacing:.08em;color:rgba(245,243,236,.55);margin-bottom:14px}
  .foot-list{list-style:none;display:flex;flex-direction:column;gap:10px;font-size:14px;color:rgba(245,243,236,.78)}
  .foot-list a{transition:color .2s ease}
  .foot-list a:hover{color:var(--lime-400)}
  .foot-bottom{
    margin-top:48px;padding-top:20px;border-top:1px solid var(--hairline-dark);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:12.5px;color:rgba(245,243,236,.55);
  }

  /* ============ 底部固定转化条 ============ */
  .sticky-bar{
    position:fixed;left:var(--nav-w);right:0;bottom:0;height:64px;z-index:70;
    display:flex;align-items:center;gap:20px;padding:0 28px;
    background:var(--sand-50);border-top:1px solid var(--hairline);
    box-shadow:var(--shadow-bar);
    transform:translateY(110%);
    transition:transform .4s cubic-bezier(.22,1,.36,1);
  }
  .sticky-bar.is-show{transform:none}
  .sticky-text{flex:1;min-width:0;font-size:14px;color:var(--ink-800);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .sticky-close{
    width:32px;height:32px;flex:none;border-radius:50%;font-size:18px;line-height:1;
    color:var(--ink-400);transition:background .2s ease,color .2s ease;
  }
  .sticky-close:hover{background:var(--sand-100);color:var(--ink-950)}

  /* ============ 入场动效 ============ */
  .reveal{opacity:0;transform:translateY(16px);transition:opacity .48s cubic-bezier(.22,1,.36,1),transform .48s cubic-bezier(.22,1,.36,1)}
  .reveal.is-in{opacity:1;transform:none}

  /* ============ 响应式 ============ */
  @media (max-width:1023px){
    .side{
      position:fixed;top:0;left:0;right:0;width:100%;height:64px;
      flex-direction:row;align-items:center;padding:0 18px;
      overflow:visible;background:var(--ink-950);
      border-bottom:1px solid var(--hairline-dark);
    }
    .brand svg{width:30px;height:30px}
    .brand-text{font-size:14px}
    .burger{display:flex}
    .side-nav{
      position:fixed;top:64px;left:0;right:0;bottom:132px;
      margin-top:0;padding:22px 20px;overflow-y:auto;
      background:var(--ink-950);
      opacity:0;visibility:hidden;transform:translateY(-8px);
      transition:opacity .24s ease,transform .24s ease,visibility .24s;
    }
    .side-foot{
      position:fixed;left:0;right:0;bottom:0;
      padding:16px 20px 22px;background:var(--ink-950);
      border-top:1px solid var(--hairline-dark);
      opacity:0;visibility:hidden;transform:translateY(-8px);
      transition:opacity .24s ease,transform .24s ease,visibility .24s;
    }
    .side.is-open .side-nav,.side.is-open .side-foot{opacity:1;visibility:visible;transform:none}
    .side-note{margin-top:10px}
    .page{margin-left:0;padding-top:64px;padding-bottom:76px}
    .sticky-bar{left:0;height:60px;padding:0 16px;gap:12px}
    .sticky-text{font-size:13px}
    .sticky-bar .btn{height:42px;padding:0 18px;font-size:14px}
    .sticky-bar .tlink{display:none}
  }
  @media (max-width:767px){
    .wrap{padding:0 18px}
    .article-wrap{padding:0 18px;gap:0}
    .page-main{padding-top:24px}
    .article-title{font-size:clamp(1.65rem,7vw,2.1rem)}
    .faq-body{padding-right:16px}
    .sticky-text{display:none}
  }
  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
    .reveal{opacity:1;transform:none}
  }

/* roulang page: category1 */
:root{
  --ink-950:#0C1512;
  --ink-800:#16241F;
  --ink-600:#3A4A44;
  --ink-400:#7C8A84;
  --sand-50:#F5F3EC;
  --sand-100:#EBE7DC;
  --lime-400:#C8F04B;
  --lime-300:#DCF98A;
  --ember-500:#FF5A2B;
  --hairline:rgba(12,21,18,.10);
  --hairline-light:rgba(245,243,236,.14);
  --r-sm:4px;
  --r-md:10px;
  --r-lg:16px;
  --shadow-lift:0 8px 24px rgba(12,21,18,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --nav-w:264px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--sand-50);
  color:var(--ink-950);
  font-family:system-ui,-apple-system,"PingFang SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--ink-950);outline-offset:2px}

/* ---------- 布局骨架 ---------- */
.page{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column;padding-bottom:64px}
.wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-alt{background:var(--sand-100)}
.section-line{border-top:1px solid var(--hairline)}

/* ---------- 左侧竖向导航 ---------- */
.side-nav{
  position:fixed;top:0;left:0;width:var(--nav-w);height:100vh;
  background:var(--ink-950);color:var(--sand-50);
  padding:30px 22px 28px;display:flex;flex-direction:column;
  overflow-y:auto;z-index:60;
}
.side-brand{display:flex;align-items:center;gap:10px;padding:0 6px 4px}
.side-brand svg{width:38px;height:38px;flex:none}
.side-brand span{font-size:16px;font-weight:700;line-height:1.3;letter-spacing:-.01em;color:var(--sand-50)}
.side-label{
  font-size:12px;letter-spacing:.16em;color:rgba(245,243,236,.45);
  margin:30px 6px 10px;
}
.nav-link{
  position:relative;display:block;padding:11px 12px 11px 16px;
  color:rgba(245,243,236,.78);font-size:15px;border-radius:var(--r-sm);
  transition:color .24s ease,background .24s ease;
}
.nav-link::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  background:var(--lime-400);transform:scaleY(0);transform-origin:top;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--lime-300);background:rgba(245,243,236,.06)}
.nav-link:hover::before{transform:scaleY(1)}
.nav-link.is-active{color:var(--lime-400);font-weight:600}
.nav-link.is-active::before{transform:scaleY(1)}
.nav-sub{
  display:block;padding:7px 12px 7px 16px;font-size:13.5px;
  color:rgba(245,243,236,.55);transition:color .2s ease;
}
.nav-sub:hover{color:var(--sand-50)}
.side-foot{margin-top:auto;padding-top:28px}
.side-foot .btn-primary{width:100%;justify-content:center}
.side-note{margin-top:12px;font-size:11.5px;line-height:1.6;color:rgba(245,243,236,.42)}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:80;
  align-items:center;justify-content:space-between;padding:0 18px;
  background:rgba(245,243,236,.86);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;transition:border-color .25s ease,background .25s ease;
}
.topbar.is-scrolled{border-bottom-color:var(--hairline)}
.topbar-brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px}
.topbar-brand svg{width:30px;height:30px;flex:none}
.burger{
  width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;
  align-items:center;gap:5px;background:none;border:1px solid var(--hairline);
  border-radius:var(--r-sm);cursor:pointer;
}
.burger span{display:block;width:18px;height:2px;background:var(--ink-950)}
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--ink-950);color:var(--sand-50);
  padding:26px 24px 30px;display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s;
  overflow-y:auto;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.drawer-title{font-size:15px;font-weight:700}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--hairline-light);background:none;
  color:var(--sand-50);border-radius:var(--r-sm);cursor:pointer;font-size:13px;
}
.drawer-link{
  display:block;padding:16px 0;font-size:22px;font-weight:700;
  border-bottom:1px solid var(--hairline-light);color:rgba(245,243,236,.86);
}
.drawer-link.is-active{color:var(--lime-400)}
.drawer-sub{display:block;padding:12px 0;font-size:15px;color:rgba(245,243,236,.6)}
.drawer-cta{margin-top:28px}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:50px;padding:0 28px;background:var(--lime-400);color:var(--ink-950);
  border:1px solid var(--lime-400);border-radius:var(--r-sm);
  font-size:15.5px;font-weight:700;cursor:pointer;
  transition:background .16s ease-out,color .16s ease-out,border-color .16s ease-out,transform .1s ease;
}
.btn-primary:hover{background:var(--ink-950);color:var(--lime-400);border-color:var(--ink-950)}
.btn-primary:active{transform:scale(.98)}
.btn-primary .arw{transition:transform .16s ease-out}
.btn-primary:hover .arw{transform:translateX(4px)}
.btn-sm{height:42px;padding:0 20px;font-size:14.5px}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:50px;padding:0 26px;background:transparent;color:var(--ink-950);
  border:1px solid var(--hairline);border-radius:var(--r-sm);
  font-size:15.5px;font-weight:600;cursor:pointer;
  transition:border-color .18s ease,background .18s ease,transform .1s ease;
}
.btn-ghost:hover{border-color:var(--ink-950);background:var(--sand-100)}
.btn-ghost:active{transform:scale(.98)}
.btn-text{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  font-size:15.5px;font-weight:600;color:var(--ink-950);padding:6px 0;
}
.btn-text::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--lime-400);transform:scaleX(0);transform-origin:left;
  transition:transform .26s var(--ease);
}
.btn-text:hover::after{transform:scaleX(1)}
.btn-text .arw{transition:transform .16s ease-out}
.btn-text:hover .arw{transform:translateX(3px)}

/* ---------- 通用排印 ---------- */
.kicker{
  font-size:12.5px;letter-spacing:.14em;color:var(--ink-400);
  margin-bottom:14px;font-weight:600;
}
.kicker-light{color:rgba(245,243,236,.55)}
h1{
  font-size:clamp(2.2rem,4.4vw,3.6rem);font-weight:800;line-height:1.06;
  letter-spacing:-.03em;
}
h2{font-size:clamp(1.6rem,2.6vw,2.3rem);font-weight:700;line-height:1.16;letter-spacing:-.02em}
h3{font-size:1.15rem;font-weight:600;line-height:1.4}
.body-text{color:var(--ink-600);font-size:16.5px;line-height:1.8}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  padding-bottom:24px;border-bottom:1px solid var(--hairline);margin-bottom:44px;
}
.sec-note{max-width:420px;font-size:14.5px;color:var(--ink-600);line-height:1.7}
.hl{
  background:linear-gradient(transparent 62%,var(--lime-400) 62%);
  padding:0 2px;
}
.rule-lime{position:relative;padding-left:18px}
.rule-lime::before{
  content:"";position:absolute;left:0;top:.28em;width:2px;height:1.1em;background:var(--lime-400);
}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-400);margin-bottom:26px}
.crumb a{color:var(--ink-600);transition:color .2s ease}
.crumb a:hover{color:var(--ink-950)}
.crumb-sep{color:var(--ink-400)}
.crumb-cur{color:var(--ink-400)}

/* ---------- 分类小 Hero ---------- */
.cat-hero{
  position:relative;padding:72px 0;border-bottom:1px solid var(--hairline);
  background-image:linear-gradient(rgba(245,243,236,.94),rgba(245,243,236,.98)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.cat-hero .lead{
  max-width:720px;margin-top:20px;font-size:clamp(1.02rem,1.4vw,1.18rem);
  color:var(--ink-600);line-height:1.75;
}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:22px;margin-top:34px}
.trust-line{
  display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;
  font-size:12.5px;letter-spacing:.06em;color:var(--ink-400);
}
.trust-line li{display:flex;align-items:center;gap:14px}
.trust-line li:not(:last-child)::after{content:"";width:1px;height:12px;background:var(--hairline)}

/* ---------- 登录三步 ---------- */
.step-row{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.step{padding:0 28px;border-left:1px solid var(--hairline)}
.step:first-child{border-left:0;padding-left:0}
.step-num{
  font-size:clamp(2.4rem,3.4vw,3.2rem);font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1.4px var(--ink-400);letter-spacing:-.02em;
}
.step h3{margin:18px 0 10px}
.step p{color:var(--ink-600);font-size:15px;line-height:1.8}
.step-bar{height:3px;background:var(--sand-100);margin-top:22px;overflow:hidden}
.step-bar span{display:block;height:100%;background:var(--lime-400)}
.step-tag{
  display:inline-block;margin-top:14px;font-size:12px;letter-spacing:.08em;
  color:var(--ember-500);border-bottom:2px solid var(--ember-500);padding-bottom:2px;
}

/* ---------- 图文交替 ---------- */
.split{display:grid;grid-template-columns:repeat(12,1fr);gap:56px;align-items:center}
.split + .split{margin-top:88px;padding-top:88px;border-top:1px solid var(--hairline)}
.split-media{grid-column:span 6}
.split-body{grid-column:span 6}
.split.rev .split-media{order:2}
.split.rev .split-body{order:1}
.img-tint{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  border:1px solid var(--hairline);background:var(--sand-100);
  aspect-ratio:16/10;
}
.img-tint::after{
  content:"";position:absolute;inset:0;background:rgba(12,21,18,.16);pointer-events:none;
}
.img-tint img{
  width:100%;height:100%;object-fit:cover;
  filter:contrast(1.05) saturate(1.02);
  transition:transform .5s var(--ease);
}
.img-tint:hover img{transform:scale(1.03)}
.split-figcap{margin-top:12px;font-size:12.5px;color:var(--ink-400)}
.bullet-list{margin-top:22px;display:grid;gap:12px}
.bullet-list li{position:relative;padding-left:20px;color:var(--ink-600);font-size:15.5px}
.bullet-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;background:var(--lime-400);
}
.split-body h2{margin-bottom:16px}

/* ---------- 深色信息面板 ---------- */
.section-dark{background:var(--ink-950);color:var(--sand-50)}
.section-dark h2{color:var(--sand-50)}
.section-dark .body-text{color:rgba(245,243,236,.72)}
.dark-grid{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:start}
.check-list{display:grid;gap:0}
.check-list li{
  display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--hairline-light);
}
.check-list li:first-child{border-top:1px solid var(--hairline-light)}
.dot{
  flex:none;width:9px;height:9px;margin-top:9px;border-radius:50%;
  background:var(--lime-400);box-shadow:0 0 0 4px rgba(200,240,75,.16);
}
.check-list strong{display:block;font-size:15.5px;font-weight:600;color:var(--sand-50)}
.check-list p{margin-top:6px;font-size:14.5px;line-height:1.75;color:rgba(245,243,236,.68)}
.mini-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:36px}
.mini-stat{min-width:96px}
.mini-stat b{display:block;font-size:1.8rem;font-weight:800;color:var(--lime-400);letter-spacing:-.02em;line-height:1.1}
.mini-stat span{font-size:12px;color:rgba(245,243,236,.6)}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;margin:0 auto;border-top:1px solid var(--hairline)}
.faq-item{border-bottom:1px solid var(--hairline)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  width:100%;background:none;border:0;text-align:left;cursor:pointer;
  padding:22px 10px;font-size:17px;font-weight:600;color:var(--ink-950);
  transition:background .2s ease;
}
.faq-q:hover{background:var(--sand-100)}
.faq-mark{position:relative;flex:none;width:16px;height:16px}
.faq-mark::before,.faq-mark::after{
  content:"";position:absolute;background:var(--ink-950);transition:transform .24s var(--ease),opacity .24s ease;
}
.faq-mark::before{top:7px;left:0;width:16px;height:2px}
.faq-mark::after{left:7px;top:0;width:2px;height:16px}
.faq-item.is-open .faq-mark::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.faq-item.is-open .faq-a{max-height:340px}
.faq-a p{padding:0 10px 24px;color:var(--ink-600);font-size:15.5px;line-height:1.85;max-width:780px}

/* ---------- CTA 通栏 ---------- */
.cta-band{
  background:var(--sand-100);border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline);
  padding:56px 0;
}
.cta-band .inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(1.35rem,2vw,1.75rem)}
.cta-band p{margin-top:10px;color:var(--ink-600);font-size:15px;max-width:620px}

/* ---------- 底部固定转化条 ---------- */
.sticky-cta{
  position:fixed;left:var(--nav-w);right:0;bottom:0;height:64px;z-index:70;
  background:var(--sand-50);border-top:1px solid var(--hairline);
  box-shadow:var(--shadow-lift);
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:0 32px;transform:translateY(120%);
  transition:transform .4s var(--ease);
}
.sticky-cta.is-in{transform:translateY(0)}
.sticky-cta.is-hidden{display:none}
.cta-line{font-size:14.5px;font-weight:600;color:var(--ink-800)}
.cta-actions{display:flex;align-items:center;gap:20px}
.cta-close{
  background:none;border:1px solid var(--hairline);border-radius:var(--r-sm);
  width:44px;height:32px;font-size:12px;color:var(--ink-600);cursor:pointer;
  transition:border-color .18s ease,color .18s ease;
}
.cta-close:hover{border-color:var(--ink-950);color:var(--ink-950)}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--ink-950);color:var(--sand-50);padding:76px 0 26px;margin-top:auto}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:48px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.foot-brand svg{width:40px;height:40px;flex:none}
.foot-brand span{font-size:16.5px;font-weight:700}
.foot-desc{font-size:14px;line-height:1.8;color:rgba(245,243,236,.72);max-width:430px}
.foot-title{font-size:12.5px;letter-spacing:.14em;color:rgba(245,243,236,.5);margin-bottom:16px}
.foot-list{display:grid;gap:11px}
.foot-list a{font-size:14.5px;color:rgba(245,243,236,.82);transition:color .2s ease}
.foot-list a:hover{color:var(--lime-400)}
.foot-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:56px;padding-top:22px;border-top:1px solid var(--hairline-light);
  font-size:12.5px;color:rgba(245,243,236,.55);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s var(--ease),transform .48s var(--ease)}
.reveal.is-visible{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .split{gap:40px}
  .dark-grid{gap:44px}
}
@media (max-width:1023px){
  .side-nav{display:none}
  .topbar{display:flex}
  .page{margin-left:0;padding-top:64px;padding-bottom:60px}
  .wrap{padding:0 22px}
  .section{padding:72px 0}
  .cat-hero{padding:56px 0}
  .step-row{grid-template-columns:1fr}
  .step{padding:26px 0;border-left:0;border-top:1px solid var(--hairline)}
  .step:first-child{border-top:0;padding-top:0}
  .split{grid-template-columns:1fr;gap:28px}
  .split.rev .split-media,
  .split.rev .split-body{order:0}
  .split + .split{margin-top:56px;padding-top:56px}
  .dark-grid{grid-template-columns:1fr;gap:34px}
  .sticky-cta{left:0;height:60px;padding:0 18px}
  .cta-line{font-size:13.5px}
  .foot-grid{grid-template-columns:1fr;gap:34px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px}
}
@media (max-width:767px){
  body{font-size:16px}
  .section{padding:56px 0}
  .cat-hero{padding:44px 0}
  .hero-actions{gap:16px}
  .btn-primary,.btn-ghost{width:100%}
  .btn-text{width:auto}
  .trust-line{gap:10px;font-size:12px}
  .sticky-cta{gap:12px}
  .cta-line{display:none}
  .faq-q{font-size:16px;padding:20px 6px}
  .faq-a p{padding:0 6px 22px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .img-tint img,.sticky-cta{transition:none}
  .img-tint:hover img{transform:none}
}

/* roulang page: category2 */
:root{
  --ink-950:#0C1512;
  --ink-800:#16241F;
  --ink-600:#3A4A44;
  --ink-400:#7C8A84;
  --sand-50:#F5F3EC;
  --sand-100:#EBE7DC;
  --lime-400:#C8F04B;
  --lime-300:#DCF98A;
  --ember-500:#FF5A2B;
  --hairline:rgba(12,21,18,0.10);
  --hairline-dark:rgba(245,243,236,0.14);
  --r-s:4px;
  --r-c:10px;
  --r-l:16px;
  --sh-dock:0 8px 24px rgba(12,21,18,0.10);
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--sand-50);
  color:var(--ink-950);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
:focus-visible{outline:2px solid var(--ink-950);outline-offset:2px;border-radius:var(--r-s)}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink-950);color:var(--sand-50);padding:10px 16px;z-index:200}
.skip:focus{left:12px;top:12px}
.wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 32px}
@media(min-width:1280px){.wrap{max-width:1360px}}
@media(max-width:767px){.wrap{padding:0 18px}}

/* ---------- 左侧竖向导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:264px;
  background:var(--ink-950);color:var(--sand-50);
  padding:26px 20px 22px;z-index:60;
  display:flex;flex-direction:column;
  overflow-y:auto;
}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:rgba(245,243,236,.18);border-radius:3px}
.brand{display:flex;align-items:flex-start;gap:10px;padding-bottom:22px;border-bottom:1px solid var(--hairline-dark)}
.brand svg{width:38px;height:38px;flex:none}
.brand-name{font-size:15px;font-weight:700;line-height:1.32;letter-spacing:.02em;color:var(--sand-50);max-width:150px}
.side-nav{margin-top:24px;flex:1 1 auto}
.side-label{font-size:12px;letter-spacing:.08em;color:rgba(245,243,236,.45);margin:0 0 10px 12px}
.nav-link{
  position:relative;display:block;
  padding:10px 12px;border-radius:var(--r-s);
  font-size:15px;color:rgba(245,243,236,.78);
  transition:color .24s var(--ease),background .24s var(--ease);
}
.nav-link::before{
  content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;background:var(--lime-400);border-radius:2px;
  transition:height .24s var(--ease);
}
.nav-link:hover{color:var(--sand-50);background:rgba(245,243,236,.06)}
.nav-link:hover::before{height:60%}
.nav-link.is-active{color:var(--lime-400);font-weight:600}
.nav-link.is-active::before{height:100%}
.nav-sub{
  display:block;padding:7px 12px;font-size:13.5px;
  color:rgba(245,243,236,.6);border-radius:var(--r-s);
  transition:color .24s var(--ease),background .24s var(--ease);
}
.nav-sub:hover{color:var(--lime-400);background:rgba(245,243,236,.05)}
.side-cta{margin-top:28px;padding-top:20px;border-top:1px solid var(--hairline-dark)}
.side-cta .btn{width:100%;justify-content:center;height:46px;padding:0 16px;font-size:14.5px}
.side-note{margin-top:12px;font-size:11.5px;line-height:1.6;color:rgba(245,243,236,.45)}

/* ---------- 顶部移动导航 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;
  align-items:center;justify-content:space-between;gap:12px;
  padding:0 18px;z-index:70;
  background:rgba(245,243,236,.9);
  transition:border-color .3s var(--ease),background .3s var(--ease);
  border-bottom:1px solid transparent;
}
.topbar.is-scrolled{background:rgba(245,243,236,.94);backdrop-filter:blur(10px);border-bottom-color:var(--hairline)}
.topbar-brand{display:flex;align-items:center;gap:9px;font-size:14.5px;font-weight:700}
.topbar-brand svg{width:32px;height:32px}
.burger{width:44px;height:44px;display:inline-flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;border-radius:var(--r-s)}
.burger span{display:block;width:22px;height:2px;background:var(--ink-950);transition:transform .24s var(--ease)}
.burger:hover span:nth-child(1){transform:translateX(3px)}
.burger:hover span:nth-child(3){transform:translateX(-3px)}
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--ink-950);color:var(--sand-50);
  padding:24px 22px 32px;display:flex;flex-direction:column;
  transform:translateY(-100%);visibility:hidden;
  transition:transform .32s var(--ease),visibility .32s var(--ease);
  overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:18px;border-bottom:1px solid var(--hairline-dark)}
.drawer-title{font-size:15px;font-weight:700}
.drawer-close{width:44px;height:44px;font-size:22px;line-height:1;color:var(--sand-50);border-radius:var(--r-s)}
.drawer-close:hover{background:rgba(245,243,236,.08)}
.drawer-nav{margin-top:18px;display:flex;flex-direction:column;gap:2px}
.drawer-nav a{display:block;padding:14px 10px;font-size:19px;font-weight:600;color:rgba(245,243,236,.86);border-bottom:1px solid rgba(245,243,236,.08)}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--lime-400)}
.drawer-sub{margin-top:14px;display:flex;flex-direction:column;gap:2px}
.drawer-sub a{padding:10px;font-size:14.5px;color:rgba(245,243,236,.6)}
.drawer-sub a:hover{color:var(--lime-400)}
.drawer-foot{margin-top:auto;padding-top:26px}
.drawer-foot .btn{width:100%;justify-content:center}

/* ---------- 内容外壳 ---------- */
.shell{margin-left:264px;padding-bottom:84px}
@media(max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .shell{margin-left:0;padding-top:64px}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:50px;padding:0 28px;border-radius:var(--r-s);
  font-size:15.5px;font-weight:600;border:1px solid transparent;
  transition:background .16s ease-out,color .16s ease-out,border-color .16s ease-out,transform .12s ease-out;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--lime-400);color:var(--ink-950)}
.btn-primary:hover{background:var(--ink-950);color:var(--lime-400)}
.btn-primary .arrow{transition:transform .16s ease-out}
.btn-primary:hover .arrow{transform:translateX(4px)}
.btn-ghost{background:transparent;border-color:var(--hairline);color:var(--ink-950)}
.btn-ghost:hover{border-color:var(--ink-950);background:var(--sand-100)}
.btn-sm{height:44px;padding:0 20px;font-size:14.5px}
.link-arrow{position:relative;display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;color:var(--ink-950);padding-bottom:3px}
.link-arrow::after{content:'';position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--lime-400);transition:width .26s var(--ease)}
.link-arrow:hover::after{width:100%}
.link-arrow:hover .arrow{transform:translateX(4px)}
.link-arrow .arrow{transition:transform .26s var(--ease)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--sand-100);border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline)}
@media(max-width:1023px){.section{padding:72px 0}}
@media(max-width:767px){.section{padding:56px 0}}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:clamp(1.75rem,3vw,2.5rem);font-weight:700;line-height:1.15;letter-spacing:-.02em}
.section-desc{margin-top:14px;color:var(--ink-600);font-size:16px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.08em;color:var(--ink-600)}
.eyebrow::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--ember-500);flex:none}

/* ---------- Hero ---------- */
.page-hero{background:var(--sand-100);border-bottom:1px solid var(--hairline);padding:72px 0 64px}
.hero-inner{display:flex;gap:22px}
.hero-rail{width:4px;flex:none;background:var(--lime-400);border-radius:2px}
.crumb{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-600);margin-bottom:16px}
.crumb a{color:var(--ink-600);transition:color .2s var(--ease)}
.crumb a:hover{color:var(--ink-950)}
.crumb-sep{color:var(--ink-400)}
.crumb-cur{color:var(--ink-400)}
.page-hero h1{
  margin-top:14px;
  font-size:clamp(2rem,3.6vw,3.1rem);
  font-weight:800;line-height:1.08;letter-spacing:-.03em;max-width:20ch;
}
.hero-lead{margin-top:18px;font-size:17px;color:var(--ink-600);max-width:62ch}
@media(max-width:767px){.page-hero{padding:44px 0 40px}.hero-inner{gap:14px}}

/* ---------- 双栏：主栏 + 窄栏 ---------- */
.cat2-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);gap:56px;align-items:start}
@media(max-width:1023px){.cat2-grid{grid-template-columns:1fr;gap:44px}}
.cat2-side{position:sticky;top:32px;display:flex;flex-direction:column;gap:24px}
@media(max-width:1023px){.cat2-side{position:static}}
.cat2-main .section-head{margin-bottom:32px}

.num-list{border-top:1px solid var(--hairline)}
.num-item{
  position:relative;display:grid;grid-template-columns:104px minmax(0,1fr);gap:22px;
  padding:30px 6px 30px 0;border-bottom:1px solid var(--hairline);
  transition:background .3s var(--ease);
}
.num-item::before{
  content:'';position:absolute;left:-22px;top:0;width:3px;height:0;
  background:var(--lime-400);border-radius:2px;
  transition:height .3s var(--ease);
}
.num-item:hover::before{height:100%}
.num-item:hover{background:var(--sand-100)}
.num-index{
  display:inline-block;align-self:start;
  font-size:clamp(1.7rem,2.6vw,2.35rem);font-weight:800;line-height:1.1;letter-spacing:-.03em;
  color:var(--ink-400);padding:2px 10px;border-radius:var(--r-s);
  transition:color .3s var(--ease),background .3s var(--ease);
}
.num-item:hover .num-index{color:var(--ink-950);background:var(--lime-400)}
.num-item h3{font-size:1.25rem;font-weight:600;line-height:1.4}
.num-item p{margin-top:10px;color:var(--ink-600);font-size:15.5px}
.dot-list{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px 20px}
.dot-list li{position:relative;padding-left:16px;font-size:14px;color:var(--ink-600)}
.dot-list li::before{content:'';position:absolute;left:0;top:.62em;width:8px;height:8px;background:var(--lime-400);border-radius:2px}
@media(max-width:639px){
  .num-item{grid-template-columns:1fr;gap:10px;padding:24px 4px}
  .num-item::before{left:-14px}
}

/* ---------- 右侧快速入口卡 ---------- */
.quick-card{background:var(--sand-100);border:1px solid var(--hairline);border-radius:var(--r-c);padding:24px}
.quick-title{font-size:13px;letter-spacing:.08em;color:var(--ink-600);margin-bottom:16px}
.quick-list{display:flex;flex-direction:column;gap:4px}
.quick-link{
  position:relative;display:inline-block;padding:8px 0;font-size:15px;font-weight:600;color:var(--ink-950);
}
.quick-link::after{content:'';position:absolute;left:0;bottom:6px;height:2px;width:0;background:var(--lime-400);transition:width .26s var(--ease)}
.quick-link:hover::after{width:100%}
.quick-card .btn{width:100%;justify-content:center;margin-top:18px}
.quick-note{margin-top:14px;font-size:12.5px;line-height:1.7;color:var(--ink-400)}
.img-tint{position:relative;overflow:hidden;border-radius:var(--r-l)}
.img-tint img{width:100%;height:100%;object-fit:cover;filter:contrast(1.05) saturate(1.02)}
.img-tint::after{content:'';position:absolute;inset:0;background:rgba(12,21,18,.15);pointer-events:none}
.portrait{aspect-ratio:3/4;border:1px solid var(--hairline)}
.portrait figcaption{position:absolute;left:16px;right:16px;bottom:14px;z-index:2;font-size:12.5px;color:rgba(245,243,236,.9)}
.wide-figure{aspect-ratio:16/9}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline)}
.step{padding:34px 26px;border-left:1px solid var(--hairline);transition:background .3s var(--ease)}
.step:first-child{border-left:0}
.step:hover{background:var(--sand-50)}
.step-idx{display:block;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--ember-500)}
.step h3{margin-top:12px;font-size:1.1rem;font-weight:600;line-height:1.4}
.step p{margin-top:10px;font-size:14.5px;color:var(--ink-600)}
@media(max-width:1023px){
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step:nth-child(3){border-left:0}
  .step:nth-child(n+3){border-top:1px solid var(--hairline)}
}
@media(max-width:639px){
  .steps{grid-template-columns:1fr}
  .step{border-left:0;border-top:1px solid var(--hairline);padding:24px 4px}
  .step:first-child{border-top:0}
}

/* ---------- 深色数据带 ---------- */
.dark-band{background:var(--ink-950);color:var(--sand-50);padding:88px 0}
@media(max-width:767px){.dark-band{padding:56px 0}}
.dark-head{max-width:720px;margin-bottom:48px}
.dark-head h2{font-size:clamp(1.75rem,3vw,2.5rem);font-weight:700;line-height:1.15;letter-spacing:-.02em}
.dark-head p{margin-top:14px;color:rgba(245,243,236,.72);font-size:16px}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}
.stat{padding-left:20px;border-left:1px solid var(--hairline-dark)}
.stat:first-child{padding-left:0;border-left:0}
.stat-num{font-size:clamp(2rem,3.2vw,2.9rem);font-weight:800;line-height:1.05;letter-spacing:-.03em;color:var(--lime-400)}
.stat-num .unit{font-size:1rem;font-weight:600;margin-left:6px;letter-spacing:0}
.stat-label{margin-top:10px;font-size:12.5px;line-height:1.6;color:rgba(245,243,236,.72)}
@media(max-width:1023px){.stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .stat:nth-child(3){padding-left:0;border-left:0}}
@media(max-width:639px){.stats{grid-template-columns:1fr;gap:22px}
  .stat{padding-left:0;border-left:0;border-top:1px solid var(--hairline-dark);padding-top:18px}
  .stat:first-child{border-top:0;padding-top:0}}

/* ---------- FAQ ---------- */
.faq{max-width:880px;border-top:1px solid var(--hairline)}
.faq-item{border-bottom:1px solid var(--hairline);transition:background .24s var(--ease)}
.faq-item:hover{background:var(--sand-100)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 14px;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink-950);
}
.faq-mark{position:relative;width:18px;height:18px;flex:none}
.faq-mark::before,.faq-mark::after{content:'';position:absolute;background:var(--ink-950);transition:transform .28s var(--ease),background .28s var(--ease)}
.faq-mark::before{left:0;top:8px;width:18px;height:2px}
.faq-mark::after{left:8px;top:0;width:2px;height:18px}
.faq-item.is-open .faq-mark::after{transform:scaleY(0)}
.faq-item.is-open .faq-mark::before{background:var(--ember-500)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.faq-a-inner{padding:0 14px 24px;color:var(--ink-600);font-size:15.5px;max-width:70ch}

/* ---------- CTA 通栏 ---------- */
.cta-band{background:var(--sand-100);border-top:1px solid var(--hairline);padding:56px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(1.5rem,2.4vw,2rem);font-weight:700;letter-spacing:-.02em;line-height:1.2}
.cta-inner p{margin-top:10px;color:var(--ink-600);font-size:15.5px}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--ink-950);color:var(--sand-50);padding:64px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:48px}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;margin-bottom:14px}
.foot-brand svg{width:36px;height:36px;flex:none}
.foot-desc{font-size:14px;line-height:1.8;color:rgba(245,243,236,.72);max-width:440px}
.foot-title{font-size:13px;letter-spacing:.08em;color:rgba(245,243,236,.5);margin-bottom:16px}
.foot-list{display:flex;flex-direction:column;gap:10px;font-size:14.5px}
.foot-list a{color:rgba(245,243,236,.8);transition:color .2s var(--ease)}
.foot-list a:hover{color:var(--lime-400)}
.foot-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid var(--hairline-dark);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(245,243,236,.55);
}
@media(max-width:1023px){.foot-grid{grid-template-columns:1fr 1fr;gap:36px}}
@media(max-width:639px){.foot-grid{grid-template-columns:1fr;gap:30px}.site-foot{padding:48px 0 24px}}

/* ---------- 底部固定转化条 ---------- */
.dock{
  position:fixed;left:264px;right:0;bottom:0;height:64px;z-index:55;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:0 32px;background:var(--sand-50);
  border-top:1px solid var(--hairline);box-shadow:var(--sh-dock);
  transform:translateY(130%);
  transition:transform .4s var(--ease);
}
.dock.is-visible{transform:translateY(0)}
.dock.is-closed{display:none}
.dock-text{font-size:14.5px;font-weight:600;color:var(--ink-950)}
.dock-actions{display:flex;align-items:center;gap:20px}
.dock-close{width:36px;height:36px;font-size:18px;line-height:1;color:var(--ink-400);border-radius:var(--r-s)}
.dock-close:hover{color:var(--ink-950);background:var(--sand-100)}
@media(max-width:1023px){
  .dock{left:0;height:60px;padding:0 16px;gap:12px}
  .dock-text{display:none}
  .dock-actions{width:100%;justify-content:space-between}
}
@media(max-width:639px){
  .dock .btn{padding:0 20px;height:44px;font-size:14.5px}
  .dock .link-arrow{font-size:14px}
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s var(--ease),transform .48s 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}
  .dock{transition:none}
  .drawer{transition:none}
  .num-item::before,.nav-link::before{transition:none}
}