/* roulang page: index */
:root{
  --brand-700:#5A38E0;--brand-600:#6C4DF6;--brand-500:#8A70FF;--brand-050:#F1EDFF;
  --accent-500:#FF8A3D;--accent-400:#FFA566;--accent-050:#FFF1E6;
  --lime-400:#C6F24E;
  --bg:#FBF8F4;--surface:#FFFFFF;--surface-2:#F4EFF9;
  --ink:#17131F;--ink-2:#4A4356;--ink-3:#857D92;--line:#E9E2F0;
  --panel:#171321;
  --grad-main:linear-gradient(135deg,#6C4DF6 0%,#8A70FF 45%,#FF8A3D 100%);
  --grad-soft:linear-gradient(135deg,rgba(108,77,246,.12),rgba(255,138,61,.12));
  --shadow-1:0 1px 2px rgba(23,19,31,.06),0 8px 24px -12px rgba(108,77,246,.18);
  --shadow-2:0 24px 60px -24px rgba(108,77,246,.35);
  --r-s:10px;--r-m:16px;--r-l:24px;--r-xl:32px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --ease:cubic-bezier(.2,.8,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;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}
h1,h2,h3,h4,p,figure{margin:0}
time,.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){.container{padding:0 24px}}
@media(min-width:1280px){.container{padding:0 32px}}
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
@media(min-width:1024px){.section-head{margin-bottom:40px}}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--brand-700);background:var(--brand-050);padding:4px 10px;border-radius:999px;margin-bottom:12px}
h2{font-size:clamp(22px,4vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
.section-sub{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:620px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-700);font-weight:600;font-size:14px;border-bottom:1px solid rgba(90,56,224,.3);padding-bottom:2px;transition:border-color .2s var(--ease),transform .2s var(--ease)}
.text-link span.arw{transition:transform .2s var(--ease)}
.text-link:hover{border-color:var(--brand-700)}
.text-link:hover span.arw{transform:translateX(4px)}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(251,248,244,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:box-shadow .24s var(--ease)}
.site-header.is-stuck{box-shadow:var(--shadow-1)}
.nav-bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;height:60px}
@media(min-width:1024px){.nav-bar{height:76px;gap:16px}}
.nav-side{display:flex;align-items:center;min-width:0}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end;gap:20px}
.nav-desktop{display:none}
@media(min-width:1024px){.nav-desktop{display:flex}}
.nav-list{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;font-size:14px;font-weight:500;color:var(--ink-2);padding:6px 0;transition:color .2s var(--ease);white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:20%;right:20%;bottom:0;height:2px;border-radius:2px;background:var(--grad-main);opacity:0;transform:scaleX(.4);transition:opacity .2s var(--ease),transform .2s var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{opacity:.5;transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{opacity:1;transform:scaleX(1)}
.logo-lockup{display:flex;align-items:center;gap:10px;justify-self:center}
.logo-mark{width:38px;height:38px;border-radius:12px;background:var(--grad-main);color:#fff;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;letter-spacing:-.02em;box-shadow:var(--shadow-1);flex:0 0 auto}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-main{font-size:15px;font-weight:700;letter-spacing:-.01em}
.logo-sub{font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.02em}
.menu-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;border-radius:12px}
.menu-toggle span{display:block;width:22px;height:2px;border-radius:2px;background:var(--ink);margin:0 auto;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(min-width:1024px){.menu-toggle{display:none}}
.nav-cta{display:none}
@media(min-width:1024px){.nav-cta{display:inline-flex}}
.icon-cta{width:44px;height:44px;border-radius:999px;background:var(--grad-main);color:#fff;display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--shadow-1)}
@media(min-width:1024px){.icon-cta{display:none}}
.icon-cta svg{width:18px;height:18px}

/* drawer */
.drawer{position:fixed;inset:0;z-index:90;background:var(--bg);display:flex;flex-direction:column;padding:20px 20px 32px;transform:translateY(-100%);visibility:hidden;transition:transform .28s var(--ease),visibility .28s var(--ease)}
.drawer.open{transform:translateY(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-title{font-size:13px;font-weight:600;color:var(--ink-3);letter-spacing:.08em}
.drawer-close{width:44px;height:44px;border-radius:12px;font-size:24px;line-height:1;color:var(--ink-2);display:flex;align-items:center;justify-content:center}
.drawer-list{margin-top:12px;display:flex;flex-direction:column}
.drawer-list a{display:flex;align-items:center;height:52px;font-size:16px;font-weight:500;color:var(--ink-2);border-bottom:1px solid var(--line)}
.drawer-list a.is-active{color:var(--brand-700);font-weight:600}
.drawer-cta{margin-top:auto;width:100%;justify-content:center}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:999px;font-size:15px;font-weight:600;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);white-space:nowrap}
.btn-primary{background:var(--grad-main);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{filter:brightness(1.04);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-1)}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-050)}
.btn-onDark{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-onDark:hover{background:rgba(255,255,255,.14);border-color:#fff}
.btn-sm{height:36px;padding:0 18px;font-size:13px}
.btn-lg{height:52px}

/* badge */
.badge{display:inline-flex;align-items:center;gap:6px;background:var(--brand-050);color:var(--brand-700);font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px}
.badge-accent{background:var(--accent-050);color:#B85A15}
.data-badge{display:inline-flex;flex-direction:column;gap:2px;background:var(--lime-400);color:#1B2310;border-radius:16px;padding:10px 16px;transition:transform .2s var(--ease)}
.data-badge:hover{transform:scale(1.03)}
.data-badge b{font-size:clamp(20px,3vw,26px);font-weight:800;font-variant-numeric:tabular-nums;line-height:1.1}
.data-badge span{font-size:11px;font-weight:500;opacity:.78}

/* hero */
.hero{position:relative;overflow:hidden;padding:40px 0 56px}
@media(min-width:1024px){.hero{padding:72px 0 96px}}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;pointer-events:none;z-index:0}
.hero::before{width:420px;height:420px;left:-160px;top:-120px;background:radial-gradient(circle,rgba(108,77,246,.18),transparent 68%)}
.hero::after{width:460px;height:460px;right:-180px;bottom:-160px;background:radial-gradient(circle,rgba(255,138,61,.16),transparent 68%)}
.hero-grid{position:relative;z-index:1;display:grid;gap:32px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:5fr 7fr;gap:48px}}
.hero-visual{position:relative;border-radius:28px;overflow:hidden;aspect-ratio:4/5;box-shadow:var(--shadow-2);border:1px solid var(--line);background:var(--surface-2)}
@media(min-width:1024px){.hero-visual{aspect-ratio:3/4}}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(23,19,31,.05) 0%,rgba(23,19,31,.45) 62%,rgba(23,19,31,.82) 100%)}
.hero-visual-top{position:absolute;left:16px;top:16px;z-index:2;display:inline-flex;align-items:center;gap:6px;background:rgba(251,248,244,.9);color:var(--brand-700);font-size:12px;font-weight:600;padding:6px 12px;border-radius:999px}
.hero-visual-bottom{position:absolute;left:20px;right:20px;bottom:20px;z-index:2;color:#fff}
.hero-visual-bottom strong{display:block;font-size:17px;font-weight:700;line-height:1.4}
.hero-visual-bottom span{display:block;margin-top:6px;font-size:13px;color:rgba(255,255,255,.8)}
.hero-copy{display:flex;flex-direction:column;gap:20px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px}
.hero h1{font-size:clamp(28px,6.2vw,52px);line-height:1.14;font-weight:800;letter-spacing:-.02em;max-width:16em}
.hero-lead{font-size:16px;line-height:1.75;color:var(--ink-2);max-width:560px}
@media(min-width:1024px){.hero-lead{font-size:18px}}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(max-width:520px){.hero-actions .btn{flex:1 1 0;min-width:0}}
.hero-stats{display:flex;flex-wrap:wrap;gap:12px;margin-top:4px}

/* self check */
.check-grid{display:grid;gap:16px}
@media(min-width:640px){.check-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.check-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.surface-2{background:var(--surface-2);border-radius:var(--r-xl)}
.param-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:22px;box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.param-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(108,77,246,.28)}
.param-card h3{font-size:18px;font-weight:600;margin-bottom:8px}
.param-card p{font-size:14px;color:var(--ink-2);line-height:1.8}
.param-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.param-icon{width:40px;height:40px;border-radius:14px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;color:var(--brand-700)}
.param-icon svg{width:20px;height:20px}

/* clip rail */
.rail-wrap{position:relative}
.rail{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 20px 20px;margin:0 -20px;scrollbar-width:thin}
@media(min-width:1024px){.rail{padding:6px 24px 20px;margin:0 -24px;gap:24px}}
.rail::-webkit-scrollbar{height:4px}
.rail::-webkit-scrollbar-thumb{background:var(--line);border-radius:4px}
@media(max-width:767px){.rail::-webkit-scrollbar{display:none}}
.clip-card{position:relative;flex:0 0 168px;scroll-snap-align:start;aspect-ratio:9/16;border-radius:20px;overflow:hidden;border:1px solid var(--line);background:var(--surface-2);box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
@media(min-width:768px){.clip-card{flex:0 0 200px}}
@media(min-width:1024px){.clip-card{flex:0 0 220px}}
.clip-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.clip-card img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.clip-card:hover img{transform:scale(1.04)}
.clip-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(23,19,31,0) 45%,rgba(23,19,31,.78) 100%)}
.clip-duration{position:absolute;left:10px;top:10px;z-index:2;background:rgba(0,0,0,.55);color:#fff;font-size:11px;font-weight:600;padding:3px 8px;border-radius:999px;font-variant-numeric:tabular-nums}
.clip-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;width:44px;height:44px;border-radius:999px;background:rgba(255,255,255,.92);display:flex;align-items:center;justify-content:center;transition:transform .22s var(--ease)}
.clip-play::before{content:"";width:0;height:0;border-left:12px solid var(--brand-600);border-top:8px solid transparent;border-bottom:8px solid transparent;margin-left:3px}
.clip-card:hover .clip-play{transform:translate(-50%,-50%) scale(1.08)}
.clip-title{position:absolute;left:12px;right:12px;bottom:12px;z-index:2;color:#fff;font-size:14px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rail-nav{display:none}
@media(min-width:1024px){
  .rail-nav{display:flex;gap:10px}
  .rail-btn{width:40px;height:40px;border-radius:999px;background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--ink-2);transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease)}
  .rail-btn:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-050)}
}

/* steps */
.step-grid{display:grid;gap:8px}
@media(min-width:1024px){.step-grid{grid-template-columns:repeat(2,1fr);gap:8px 32px}}
.step-item{display:flex;gap:16px;padding:18px 16px;border-radius:20px;border:1px solid transparent;transition:background-color .2s var(--ease),border-color .2s var(--ease)}
.step-item:hover{background:var(--surface-2);border-color:var(--line)}
.step-no{flex:0 0 36px;width:36px;height:36px;border-radius:12px;background:var(--grad-main);color:#fff;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums}
.step-body h3{font-size:17px;font-weight:600;margin-bottom:6px}
.step-body p{font-size:14px;color:var(--ink-2);line-height:1.8}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.tag{font-size:12px;font-weight:500;color:var(--ink-3);background:var(--surface-2);padding:3px 10px;border-radius:999px}

/* testimonial */
.testi-band{position:relative;background:var(--panel);border-radius:28px;padding:32px 24px;overflow:hidden}
@media(min-width:1024px){.testi-band{padding:48px 40px}}
.testi-band::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(108,77,246,.22),rgba(255,138,61,.12) 70%,transparent);pointer-events:none}
.testi-inner{position:relative;z-index:1}
.testi-band h2{color:#fff}
.testi-band .eyebrow{background:rgba(255,255,255,.12);color:#D9CEFF}
.testi-band .section-sub{color:rgba(255,255,255,.72)}
.testi-rail{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;margin-top:28px;padding-bottom:8px}
.testi-card{flex:0 0 300px;scroll-snap-align:start;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:20px;padding:20px}
.testi-top{display:flex;align-items:center;gap:12px}
.avatar{width:40px;height:40px;border-radius:999px;background:var(--grad-main);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px}
.testi-name{color:#fff;font-size:13px;font-weight:600}
.testi-role{color:rgba(255,255,255,.55);font-size:12px}
.testi-card p{margin-top:14px;color:rgba(255,255,255,.82);font-size:14px;line-height:1.8}
.stars{margin-top:12px;color:var(--lime-400);font-size:13px;letter-spacing:2px}

/* cta band */
.cta-band{background:var(--grad-main);border-radius:32px;padding:32px 24px;color:#fff;display:grid;gap:24px;align-items:center;box-shadow:var(--shadow-2)}
@media(min-width:1024px){.cta-band{grid-template-columns:1fr auto;padding:48px 48px;gap:40px}}
.cta-band h2{color:#fff;font-size:clamp(22px,3.4vw,32px)}
.cta-band p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.9);max-width:560px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.trust-chip{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:5px 12px;font-size:12px;font-weight:500}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(max-width:520px){.cta-actions .btn{width:100%}}

/* posts */
.feature-card{display:grid;gap:20px;background:var(--surface);border:1px solid var(--line);border-radius:28px;overflow:hidden;box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
@media(min-width:1024px){.feature-card{grid-template-columns:5fr 7fr;align-items:stretch}}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.feature-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
@media(min-width:1024px){.feature-media{aspect-ratio:auto;height:100%}}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.feature-card:hover .feature-media img{transform:scale(1.04)}
.feature-body{padding:22px 20px 26px;display:flex;flex-direction:column;gap:12px}
@media(min-width:1024px){.feature-body{padding:32px 32px 32px 8px;justify-content:center}}
.feature-body h3{font-size:clamp(19px,2.6vw,24px);font-weight:700;line-height:1.45;transition:color .2s var(--ease)}
.feature-card:hover .feature-body h3{color:var(--brand-700)}
.feature-body p{font-size:14px;color:var(--ink-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-grid{display:grid;gap:16px;margin-top:16px}
@media(min-width:640px){.post-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.post-grid{grid-template-columns:repeat(3,1fr);gap:24px;margin-top:24px}}
.post-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.post-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-cat{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.9);color:var(--brand-700);font-size:11px;font-weight:600;padding:4px 10px;border-radius:999px}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:17px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s var(--ease)}
.post-card:hover .post-body h3{color:var(--brand-700)}
.post-body p{font-size:14px;color:var(--ink-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--ink-3);font-weight:500}
.post-meta .arw{transition:transform .2s var(--ease);color:var(--brand-600);font-weight:700}
.post-card:hover .post-meta .arw{transform:translateX(4px)}
.empty-state{min-height:120px;border:1.5px dashed var(--line);border-radius:24px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--ink-3);font-size:14px;background:var(--surface)}

/* faq */
.faq-grid{display:grid;gap:12px}
@media(min-width:1024px){.faq-grid{grid-template-columns:repeat(2,1fr);gap:16px}}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.faq-item[open]{border-color:rgba(108,77,246,.24);box-shadow:var(--shadow-1)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;cursor:pointer;font-size:16px;font-weight:600;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-sign{position:relative;flex:0 0 28px;width:28px;height:28px;border-radius:999px;background:var(--grad-main);display:flex;align-items:center;justify-content:center}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:#fff;border-radius:2px}
.faq-sign::before{width:12px;height:2px}
.faq-sign::after{width:2px;height:12px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.faq-item[open] .faq-sign::after{transform:rotate(90deg);opacity:0}
.faq-body{padding:0 18px 18px;font-size:15px;line-height:1.8;color:var(--ink-2)}

/* sticky mobile bar */
.sticky-bar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:flex;align-items:center;justify-content:space-between;gap:12px;height:64px;padding:0 16px;background:rgba(23,19,31,.92);backdrop-filter:blur(10px);color:#fff}
.sticky-bar span{font-size:13px;font-weight:500;color:rgba(255,255,255,.82)}
@media(min-width:768px){.sticky-bar{display:none}}
@media(max-width:767px){body{padding-bottom:64px}}

/* footer */
.site-footer{margin-top:56px;background:var(--panel);color:#fff;border-top:2px solid transparent;border-image:var(--grad-main) 1;padding:48px 0 0}
@media(min-width:1024px){.site-footer{margin-top:96px;border-radius:24px 24px 0 0;border-image:none;border-top:2px solid rgba(255,255,255,.08);position:relative;padding-top:64px}}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad-main);display:none}
@media(min-width:1024px){.site-footer::before{display:block}}
.footer-grid{display:grid;gap:28px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px}}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .logo-mark{box-shadow:none}
.footer-main{color:#fff !important}
.footer-sub{color:rgba(255,255,255,.55) !important}
.footer-desc{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.68);max-width:300px}
.social-row{display:flex;gap:10px;margin-top:18px}
.social-btn{width:36px;height:36px;border-radius:999px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.82);transition:background-color .2s var(--ease),color .2s var(--ease)}
.social-btn:hover{background:var(--brand-600);color:#fff}
.social-btn svg{width:16px;height:16px}
.footer-col h4{font-size:13px;font-weight:600;color:rgba(255,255,255,.95);margin-bottom:14px;letter-spacing:.04em}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--brand-500)}
.footer-bottom{margin-top:36px;border-top:1px solid rgba(255,255,255,.1);padding:18px 0 24px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12px;color:rgba(255,255,255,.5)}
@media(prefers-reduced-motion:reduce){*{animation:none !important;transition:none !important;scroll-behavior:auto !important}}

/* roulang page: article */
:root{
  --brand-700:#5A38E0;
  --brand-600:#6C4DF6;
  --brand-500:#8A70FF;
  --brand-050:#F1EDFF;
  --accent-500:#FF8A3D;
  --accent-400:#FFA566;
  --accent-050:#FFF1E6;
  --lime-400:#C6F24E;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --surface-2:#F4EFF9;
  --ink:#17131F;
  --ink-2:#4A4356;
  --ink-3:#857D92;
  --line:#E9E2F0;
  --panel:#171321;
  --grad-main:linear-gradient(135deg,#6C4DF6 0%,#8A70FF 45%,#FF8A3D 100%);
  --grad-soft:linear-gradient(135deg,rgba(108,77,246,.12),rgba(255,138,61,.12));
  --shadow-1:0 1px 2px rgba(23,19,31,.06),0 8px 24px -12px rgba(108,77,246,.18);
  --shadow-2:0 24px 60px -24px rgba(108,77,246,.35);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --r-xl:32px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
input,textarea,select{font-family:inherit;font-size:15px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media(min-width:1024px){.container{padding:0 24px;}}
@media(min-width:1280px){.container{padding:0 32px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,248,244,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s cubic-bezier(.2,.8,.2,1);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  height:60px;
  gap:12px;
}
@media(min-width:1024px){.nav-bar{height:76px;}}
.nav-side{display:flex;align-items:center;gap:18px;min-width:0;}
.nav-right{justify-content:flex-end;}
.nav-desktop{display:none;}
@media(min-width:1024px){.nav-desktop{display:block;}}
.nav-list{display:flex;align-items:center;gap:28px;}
.nav-link{
  position:relative;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-2);
  padding:6px 0;
  white-space:nowrap;
  transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:20%;right:20%;bottom:-2px;height:2px;
  border-radius:2px;background:var(--grad-main);
  opacity:0;transform:scaleX(.4);
  transition:opacity .22s ease,transform .22s cubic-bezier(.2,.8,.2,1);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{opacity:1;transform:scaleX(1);}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{opacity:1;transform:scaleX(1);}

.logo-lockup{display:flex;align-items:center;gap:10px;padding:4px 6px;border-radius:14px;transition:transform .22s ease;}
.logo-lockup:hover{transform:translateY(-1px);}
.logo-mark{
  width:38px;height:38px;flex:0 0 38px;
  border-radius:12px;
  background:var(--grad-main);
  color:#fff;font-weight:800;font-size:15px;
  display:inline-flex;align-items:center;justify-content:center;
  letter-spacing:.02em;
  box-shadow:0 8px 20px -10px rgba(108,77,246,.7);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-main{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.logo-sub{font-size:11px;font-weight:500;color:var(--ink-3);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .2s cubic-bezier(.2,.8,.2,1),box-shadow .24s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--grad-main);color:#fff;box-shadow:0 10px 26px -14px rgba(108,77,246,.85);}
.btn-primary:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(0);}
.btn-secondary{background:var(--surface);color:var(--ink);border:1.5px solid var(--line);}
.btn-secondary:hover{border-color:var(--brand-500);background:var(--brand-050);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.nav-cta{display:none;}
@media(min-width:1024px){.nav-cta{display:inline-flex;}}

.icon-cta{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:999px;
  background:var(--grad-main);color:#fff;
  box-shadow:0 10px 22px -14px rgba(108,77,246,.9);
}
.icon-cta svg{width:20px;height:20px;}
@media(min-width:1024px){.icon-cta{display:none;}}

.menu-toggle{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.7);
}
.menu-toggle span{display:block;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s ease,opacity .22s ease;}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
@media(min-width:1024px){.menu-toggle{display:none;}}

.drawer{
  position:fixed;inset:0 0 auto 0;
  min-height:100vh;
  background:rgba(251,248,244,.98);
  backdrop-filter:blur(16px);
  padding:20px 20px 32px;
  transform:translateY(-102%);
  opacity:0;visibility:hidden;
  transition:transform .3s cubic-bezier(.2,.8,.2,1),opacity .3s ease,visibility .3s;
  z-index:70;
  display:flex;flex-direction:column;
}
.drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
@media(min-width:1024px){.drawer{display:none;}}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-title{font-size:15px;font-weight:700;}
.drawer-close{width:44px;height:44px;border-radius:12px;font-size:24px;line-height:1;color:var(--ink-2);}
.drawer-list{margin-top:8px;flex:1;}
.drawer-list li a{
  display:flex;align-items:center;height:48px;
  font-size:16px;font-weight:500;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer-list li a:hover,.drawer-list li a.is-active{color:var(--brand-700);font-weight:600;}
.drawer-cta{width:100%;margin-top:20px;}

/* ---------- 通用组件 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1.6;
}
.badge-brand{background:var(--brand-050);color:var(--brand-700);}
.badge-accent{background:var(--accent-050);color:#B8541A;}
.badge-lime{background:var(--lime-400);color:#25301A;}

.section{padding:56px 0;}
@media(min-width:1024px){.section{padding:96px 0;}}
.section-head{margin-bottom:28px;}
@media(min-width:1024px){.section-head{margin-bottom:40px;}}
.section-title{font-size:clamp(22px,4vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em;}
.section-sub{margin-top:10px;font-size:15px;color:var(--ink-3);max-width:640px;}

.breadcrumb{font-size:12px;color:var(--ink-3);}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"›";color:var(--ink-3);opacity:.7;}
.breadcrumb a{color:var(--ink-3);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand-700);}
.breadcrumb [aria-current="page"]{color:var(--ink-2);}

/* ---------- 文章头 ---------- */
.article-hero{position:relative;overflow:hidden;background:var(--bg);padding:32px 0 8px;}
.hero-glow{
  position:absolute;inset:-30% -10% auto -10%;height:420px;
  background:
    radial-gradient(closest-side,rgba(108,77,246,.18),transparent 72%) 12% 30%/460px 460px no-repeat,
    radial-gradient(closest-side,rgba(255,138,61,.16),transparent 72%) 88% 20%/420px 420px no-repeat;
  pointer-events:none;
}
.article-hero .container{position:relative;}
.article-head{margin-top:24px;display:grid;gap:20px;}
@media(min-width:1024px){
  .article-head{grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:32px;}
}
.article-title{
  margin-top:14px;
  font-size:clamp(24px,4.4vw,40px);
  line-height:1.2;
  font-weight:800;
  letter-spacing:-.02em;
  max-width:20em;
}
.article-meta{
  margin-top:16px;
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;font-weight:500;color:var(--ink-3);
  font-variant-numeric:tabular-nums;
}
.article-meta .dot{width:4px;height:4px;border-radius:999px;background:var(--line);}
.share-row{display:flex;gap:10px;}
.share-btn{
  width:38px;height:38px;border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);color:var(--ink-2);
  transition:transform .2s ease,border-color .2s ease,color .2s ease,box-shadow .24s ease;
}
.share-btn svg{width:17px;height:17px;}
.share-btn:hover{transform:translateY(-2px);border-color:var(--brand-500);color:var(--brand-700);box-shadow:var(--shadow-1);}

/* ---------- 正文布局 ---------- */
.article-wrap{padding:36px 0 0;}
@media(min-width:1024px){.article-wrap{padding:48px 0 0;}}
.article-layout{display:grid;gap:40px;}
@media(min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start;}
}
.article-column{min-width:0;}
.article-cover{
  margin:0 0 28px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--surface-2);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}

.article-body{font-size:16.5px;line-height:1.85;color:var(--ink-2);max-width:760px;}
.article-body p{margin:0 0 20px;}
.article-body h2{
  position:relative;
  margin:40px 0 16px;padding-left:14px;
  font-size:clamp(20px,2.6vw,24px);line-height:1.4;font-weight:700;color:var(--ink);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:3px;background:var(--grad-main);
}
.article-body h3{margin:28px 0 12px;font-size:19px;line-height:1.45;font-weight:700;color:var(--ink);}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:1.5em;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;
  background:var(--surface-2);border-left:4px solid var(--brand-600);
  border-radius:0 var(--r-md) var(--r-md) 0;color:var(--ink-2);
}
.article-body img{margin:24px 0;border-radius:var(--r-md);border:1px solid var(--line);height:auto;}
.article-body a{color:var(--brand-700);text-decoration:underline;text-decoration-color:rgba(90,56,224,.3);text-underline-offset:3px;transition:text-decoration-color .2s ease;}
.article-body a:hover{text-decoration-color:var(--brand-700);}
.article-body strong{color:var(--ink);font-weight:600;}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.article-body th{background:var(--surface-2);text-align:left;padding:12px 14px;font-weight:600;color:var(--ink);}
.article-body td{padding:12px 14px;border-top:1px solid var(--line);}
@media(max-width:640px){
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
}

.empty-card{
  min-height:160px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  border:1.5px dashed var(--line);border-radius:var(--r-lg);
  padding:32px 24px;text-align:center;color:var(--ink-3);font-size:15px;
  background:var(--surface);
}
.empty-mark{
  width:56px;height:56px;border-radius:18px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-050);color:var(--brand-700);
}
.empty-mark svg{width:26px;height:26px;}

/* ---------- 侧栏 ---------- */
.article-side{display:grid;gap:20px;}
@media(min-width:1024px){.article-side{position:sticky;top:104px;}}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px;box-shadow:var(--shadow-1);
}
.side-card h3{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.side-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;color:var(--ink-2);padding:10px 0;border-top:1px solid var(--line);
}
.side-list li:first-child{border-top:0;padding-top:0;}
.side-list .idx{
  flex:0 0 22px;height:22px;margin-top:2px;border-radius:7px;
  background:var(--brand-050);color:var(--brand-700);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.side-links li+li{margin-top:2px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;
  height:44px;padding:0 12px;border-radius:12px;
  font-size:14px;font-weight:500;color:var(--ink-2);
  transition:background-color .2s ease,color .2s ease;
}
.side-links a:hover{background:var(--surface-2);color:var(--brand-700);}
.side-links a span{color:var(--ink-3);transition:transform .2s ease;}
.side-links a:hover span{transform:translateX(3px);color:var(--brand-700);}

/* ---------- 相关推荐 ---------- */
.card-grid{display:grid;gap:16px;grid-template-columns:1fr;}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr);gap:20px;}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
.post-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .24s cubic-bezier(.2,.8,.2,1),box-shadow .24s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.post-thumb{position:relative;overflow:hidden;background:var(--surface-2);}
.post-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s cubic-bezier(.2,.8,.2,1);}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-thumb .badge{position:absolute;top:12px;left:12px;background:rgba(255,255,255,.88);color:var(--brand-700);backdrop-filter:blur(6px);}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-body h3{font-size:18px;line-height:1.45;font-weight:600;color:var(--ink);transition:color .2s ease;}
.post-card:hover .post-body h3{color:var(--brand-700);}
.post-body p{font-size:14px;line-height:1.7;color:var(--ink-2);}
.post-foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;
}
.post-foot .arrow{transition:transform .2s ease;color:var(--brand-600);}
.post-card:hover .post-foot .arrow{transform:translateX(4px);}

/* ---------- CTA ---------- */
.cta-band{padding:0 0 56px;}
@media(min-width:1024px){.cta-band{padding:0 0 96px;}}
.cta-card{
  position:relative;overflow:hidden;
  background:var(--grad-main);color:#fff;
  border-radius:var(--r-xl);padding:32px 24px;
  display:grid;gap:22px;
  box-shadow:var(--shadow-2);
}
@media(min-width:1024px){.cta-card{grid-template-columns:minmax(0,1fr) auto;align-items:center;padding:44px 48px;}}
.cta-card h2{font-size:clamp(21px,3.2vw,30px);line-height:1.3;font-weight:800;letter-spacing:-.01em;}
.cta-card p{margin-top:10px;font-size:15px;line-height:1.7;color:rgba(255,255,255,.9);max-width:560px;}
.cta-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.cta-tags span{
  padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.24);
}
.btn-ghost{
  background:#fff;color:var(--brand-700);
  border:1.5px solid rgba(255,255,255,.9);
  height:50px;padding:0 28px;
}
.btn-ghost:hover{transform:translateY(-1px);box-shadow:0 20px 40px -20px rgba(0,0,0,.5);}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;gap:16px;}
@media(min-width:1024px){.faq-grid{grid-template-columns:repeat(2,1fr);gap:20px;}}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 20px;transition:border-color .2s ease,box-shadow .24s ease;
}
.faq-item[open]{border-color:rgba(108,77,246,.24);box-shadow:var(--shadow-1);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  list-style:none;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .sign{
  flex:0 0 28px;height:28px;border-radius:999px;
  background:var(--grad-main);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:600;line-height:1;
  transition:transform .22s ease;
}
.faq-item[open] summary .sign{transform:rotate(45deg);}
.faq-item p{margin-top:14px;font-size:15px;line-height:1.8;color:var(--ink-2);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--panel);color:#CFC9DA;
  border-top:2px solid transparent;
  border-image:var(--grad-main) 1;
  padding:48px 0 24px;
}
@media(min-width:1024px){
  .site-footer{border-radius:var(--r-lg) var(--r-lg) 0 0;padding:64px 0 28px;}
}
.footer-grid{display:grid;gap:28px;grid-template-columns:1fr;}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;}}
.footer-brand{display:flex;align-items:center;gap:10px;}
.footer-main{color:#fff;}
.footer-sub{color:rgba(255,255,255,.55);}
.footer-desc{margin-top:14px;font-size:14px;line-height:1.75;color:rgba(255,255,255,.62);max-width:320px;}
.social-row{display:flex;gap:10px;margin-top:18px;}
.social-btn{
  width:36px;height:36px;border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.08);color:#E7E3F0;
  transition:background-color .2s ease,transform .2s ease,color .2s ease;
}
.social-btn svg{width:17px;height:17px;}
.social-btn:hover{background:rgba(138,112,255,.28);color:#fff;transform:translateY(-2px);}
.footer-col h4{font-size:13px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-col ul li+li{margin-top:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);transition:color .2s ease;}
.footer-col a:hover{color:var(--brand-500);}
.footer-bottom{
  margin-top:36px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:12px;color:rgba(255,255,255,.5);
  font-variant-numeric:tabular-nums;
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
    --brand-700:#5A38E0;
    --brand-600:#6C4DF6;
    --brand-500:#8A70FF;
    --brand-050:#F1EDFF;
    --accent-500:#FF8A3D;
    --accent-400:#FFA566;
    --accent-050:#FFF1E6;
    --lime-400:#C6F24E;
    --bg:#FBF8F4;
    --surface:#FFFFFF;
    --surface-2:#F4EFF9;
    --ink:#17131F;
    --ink-2:#4A4356;
    --ink-3:#857D92;
    --line:#E9E2F0;
    --panel:#171321;
    --grad-main:linear-gradient(135deg,#6C4DF6 0%,#8A70FF 45%,#FF8A3D 100%);
    --grad-soft:linear-gradient(135deg,rgba(108,77,246,.12),rgba(255,138,61,.12));
    --shadow-1:0 1px 2px rgba(23,19,31,.06), 0 8px 24px -12px rgba(108,77,246,.18);
    --shadow-2:0 24px 60px -24px rgba(108,77,246,.35);
    --r-sm:10px;
    --r-md:16px;
    --r-lg:24px;
    --r-xl:32px;
    --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit}
  ul,ol{margin:0;padding:0}
  h1,h2,h3,h4,p{margin:0}
  ::selection{background:rgba(108,77,246,.18)}
  :focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){.container{padding:0 24px}}
  @media (min-width:1280px){.container{padding:0 32px}}

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(251,248,244,.82);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .22s cubic-bezier(.2,.8,.2,1);
  }
  .site-header.is-scrolled{box-shadow:var(--shadow-1)}
  .nav-bar{
    display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
    gap:12px;min-height:58px;
  }
  @media (min-width:1024px){.nav-bar{min-height:76px}}
  .nav-side{display:flex;align-items:center;gap:14px;min-width:0}
  .nav-left{justify-content:flex-start}
  .nav-right{justify-content:flex-end;gap:20px}
  .nav-desktop{display:none}
  @media (min-width:1024px){.nav-desktop{display:block}}
  .nav-list{display:flex;align-items:center;gap:28px;list-style:none}
  .nav-link{
    position:relative;display:inline-block;
    font-size:14.5px;font-weight:500;color:var(--ink-2);
    padding:8px 0;white-space:nowrap;
    transition:color .18s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:0;
    width:0;height:2px;border-radius:2px;background:var(--grad-main);
    transform:translateX(-50%);
    transition:width .22s cubic-bezier(.2,.8,.2,1);
  }
  .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%}

  .logo-lockup{display:flex;align-items:center;gap:10px;justify-self:center}
  .logo-mark{
    width:38px;height:38px;border-radius:12px;flex:none;
    background:var(--grad-main);color:#fff;
    display:grid;place-items:center;
    font-size:14px;font-weight:800;letter-spacing:-.02em;
    box-shadow:0 8px 20px -10px rgba(108,77,246,.7);
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.2}
  .logo-main{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
  .logo-sub{font-size:11px;font-weight:500;color:var(--ink-3)}

  .menu-toggle{
    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-toggle span{display:block;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s ease,opacity .22s ease}
  .menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
  .menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  @media (min-width:1024px){.menu-toggle{display:none}}

  .icon-cta{
    display:inline-flex;align-items:center;justify-content:center;
    width:42px;height:42px;border-radius:999px;
    background:var(--grad-main);color:#fff;flex:none;
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .icon-cta svg{width:18px;height:18px}
  .icon-cta:hover{transform:translateY(-1px);box-shadow:var(--shadow-2)}
  @media (min-width:1024px){.icon-cta{display:none}}
  .nav-cta{display:none}
  @media (min-width:1024px){.nav-cta{display:inline-flex}}

  /* 抽屉 */
  .drawer{
    position:fixed;inset:0;z-index:70;
    background:var(--bg);
    padding:18px 20px 28px;
    display:flex;flex-direction:column;
    transform:translateY(-100%);
    transition:transform .28s cubic-bezier(.2,.8,.2,1);
    overflow-y:auto;
  }
  .drawer.is-open{transform:translateY(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line)}
  .drawer-title{font-size:13px;font-weight:600;color:var(--ink-3);letter-spacing:.08em}
  .drawer-close{
    width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
    background:#fff;color:var(--ink);font-size:22px;line-height:1;cursor:pointer;
  }
  .drawer-list{list-style:none;margin:12px 0 0}
  .drawer-list li{border-bottom:1px solid var(--line)}
  .drawer-list a{
    display:flex;align-items:center;min-height:48px;
    font-size:16px;font-weight:500;color:var(--ink-2);
  }
  .drawer-list a.is-active{color:var(--brand-700);font-weight:600}
  .drawer-cta{margin-top:auto;width:100%}
  @media (min-width:1024px){.drawer{display:none}}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:999px;
    font-size:15px;font-weight:600;border:1.5px solid transparent;
    cursor:pointer;white-space:nowrap;
    transition:transform .2s cubic-bezier(.2,.8,.2,1),box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease,filter .2s ease;
  }
  .btn-primary{background:var(--grad-main);color:#fff;box-shadow:0 10px 26px -16px rgba(108,77,246,.85)}
  .btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-2);filter:brightness(1.04)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
  .btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-050);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-sm{height:40px;padding:0 18px;font-size:14px}

  .link-more{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;font-weight:600;color:var(--brand-700);
    border-bottom:1px solid rgba(90,56,224,.3);
    padding-bottom:2px;
    transition:border-color .2s ease,color .2s ease;
  }
  .link-more svg{width:15px;height:15px;transition:transform .2s cubic-bezier(.2,.8,.2,1)}
  .link-more:hover{border-color:var(--brand-700)}
  .link-more:hover svg{transform:translateX(4px)}

  /* ---------- 通用区块 ---------- */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section-head{margin-bottom:28px}
  @media (min-width:1024px){.section-head{margin-bottom:40px}}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;font-weight:600;letter-spacing:.06em;
    color:var(--brand-700);background:var(--brand-050);
    border-radius:999px;padding:5px 12px;margin-bottom:14px;
  }
  .eyebrow .dot{width:6px;height:6px;border-radius:999px;background:var(--grad-main)}
  h2.section-title{font-size:clamp(22px,4vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
  .section-desc{margin-top:12px;color:var(--ink-2);font-size:15px;max-width:760px}
  .divider{height:1px;background:var(--line);border:0;margin:0}

  /* ---------- 页头 ---------- */
  .page-hero{
    position:relative;
    padding:32px 0 48px;
    background:var(--grad-soft);
    border-bottom:1px solid var(--line);
    overflow:hidden;
  }
  @media (min-width:1024px){.page-hero{padding:44px 0 72px}}
  .page-hero::before{
    content:"";position:absolute;width:420px;height:420px;left:-140px;top:-180px;
    background:radial-gradient(circle at center,rgba(108,77,246,.20),transparent 68%);
    pointer-events:none;
  }
  .page-hero::after{
    content:"";position:absolute;width:380px;height:380px;right:-120px;bottom:-200px;
    background:radial-gradient(circle at center,rgba(255,138,61,.18),transparent 68%);
    pointer-events:none;
  }
  .breadcrumb{position:relative;z-index:1;font-size:12px;color:var(--ink-3)}
  .breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none}
  .breadcrumb li+li::before{content:"›";margin-right:8px;color:var(--ink-3)}
  .breadcrumb a:hover{color:var(--brand-700)}
  .breadcrumb .current{color:var(--ink-2)}

  .hero-grid{
    position:relative;z-index:1;
    display:grid;gap:32px;align-items:center;margin-top:24px;
  }
  @media (min-width:1024px){
    .hero-grid{grid-template-columns:1.15fr .85fr;gap:56px;margin-top:32px}
  }
  .hero-title{
    font-size:clamp(28px,5.2vw,46px);
    line-height:1.15;font-weight:800;letter-spacing:-.02em;
  }
  .hero-title .hl{
    background:linear-gradient(135deg,#6C4DF6,#FF8A3D);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero-sub{margin-top:16px;font-size:16px;color:var(--ink-2);max-width:600px}
  @media (min-width:1024px){.hero-sub{font-size:17px}}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
  .hero-media{margin-top:8px}
  .hero-media img{
    width:100%;aspect-ratio:16/10;object-fit:cover;
    border-radius:var(--r-lg);border:1px solid var(--line);
    box-shadow:var(--shadow-1);
  }
  .hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
  .chip{
    display:inline-flex;align-items:center;gap:8px;
    background:rgba(255,255,255,.86);border:1px solid var(--line);
    border-radius:999px;padding:6px 14px;font-size:13px;font-weight:500;color:var(--ink-2);
  }
  .chip .dot{width:7px;height:7px;border-radius:999px;background:var(--grad-main);flex:none}

  /* ---------- 布局：锚点 + 内容 ---------- */
  .split{display:grid;gap:32px}
  @media (min-width:1024px){
    .split{grid-template-columns:236px minmax(0,1fr);gap:56px}
  }
  .anchor-nav{position:static}
  @media (max-width:1023px){
    .anchor-nav{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px}
    .anchor-nav a{flex:none}
    .anchor-nav .anchor-title{display:none}
  }
  @media (min-width:1024px){
    .anchor-nav{position:sticky;top:104px;align-self:start}
  }
  .anchor-title{font-size:12px;font-weight:600;color:var(--ink-3);letter-spacing:.08em;margin-bottom:14px}
  .anchor-nav ul{list-style:none;display:grid;gap:4px}
  @media (max-width:1023px){.anchor-nav ul{display:flex;gap:10px}}
  .anchor-nav a{
    display:block;padding:9px 14px;border-radius:12px;
    font-size:14px;font-weight:500;color:var(--ink-2);
    border:1px solid transparent;
    transition:background .2s ease,color .2s ease,border-color .2s ease;
  }
  .anchor-nav a:hover{background:#fff;border-color:var(--line);color:var(--brand-700)}
  .anchor-nav a.is-current{background:#fff;border-color:rgba(108,77,246,.24);color:var(--brand-700);font-weight:600}

  .content-col{min-width:0}
  .prose p{font-size:15.5px;line-height:1.85;color:var(--ink-2)}
  @media (min-width:1024px){.prose p{font-size:16.5px}}
  .prose p+p{margin-top:20px}

  /* zigzag */
  .zig{display:grid;gap:28px;align-items:center;scroll-margin-top:110px}
  @media (min-width:1024px){
    .zig{grid-template-columns:1fr 1fr;gap:52px}
    .zig.is-reverse .zig-media{order:2}
  }
  .zig+.zig{margin-top:56px;padding-top:56px;border-top:1px solid var(--line)}
  @media (min-width:1024px){.zig+.zig{margin-top:72px;padding-top:72px}}
  .zig-media img{
    width:100%;aspect-ratio:16/10;object-fit:cover;
    border-radius:var(--r-lg);border:1px solid var(--line);
    transition:transform .24s cubic-bezier(.2,.8,.2,1),box-shadow .24s ease;
  }
  .zig-media:hover img{transform:translateY(-4px);box-shadow:var(--shadow-2)}
  .zig-index{
    font-size:12px;font-weight:700;color:var(--brand-700);
    background:var(--brand-050);border-radius:999px;
    padding:4px 10px;letter-spacing:.04em;
  }
  .zig-title{font-size:clamp(19px,2.6vw,24px);font-weight:700;line-height:1.35;margin-top:14px}
  .zig .prose{margin-top:14px}
  .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
  .tag{
    font-size:12px;font-weight:600;color:var(--brand-700);
    background:var(--brand-050);border-radius:999px;padding:5px 11px;
  }
  .tag.orange{color:#96490F;background:var(--accent-050)}

  .step-list{list-style:none;margin-top:18px;display:grid;gap:12px}
  .step-list li{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:14px 16px}
  .step-num{
    flex:none;width:28px;height:28px;border-radius:10px;
    background:var(--grad-main);color:#fff;
    display:grid;place-items:center;font-size:13px;font-weight:700;
    font-variant-numeric:tabular-nums;
  }
  .step-text{font-size:14.5px;color:var(--ink-2);line-height:1.7}
  .step-text b{color:var(--ink);font-weight:600}

  /* ---------- 自检区 ---------- */
  .band{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .stat-strip{display:grid;gap:16px;margin-top:28px}
  @media (min-width:640px){.stat-strip{grid-template-columns:repeat(2,1fr);gap:20px}}
  @media (min-width:1024px){.stat-strip{grid-template-columns:repeat(4,1fr);gap:24px}}
  .stat-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    padding:22px;transition:transform .22s cubic-bezier(.2,.8,.2,1),box-shadow .22s ease;
  }
  .stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
  .stat-num{
    font-size:clamp(24px,3vw,30px);font-weight:800;line-height:1.1;
    font-variant-numeric:tabular-nums;color:var(--brand-700);
  }
  .stat-label{margin-top:8px;font-size:13px;font-weight:600;color:var(--ink)}
  .stat-note{margin-top:6px;font-size:13px;color:var(--ink-3);line-height:1.65}
  .lime-badge{
    display:inline-block;background:var(--lime-400);color:#17131F;
    font-size:11px;font-weight:700;border-radius:999px;padding:3px 9px;margin-bottom:12px;
  }

  .check-grid{display:grid;gap:16px;margin-top:28px}
  @media (min-width:768px){.check-grid{grid-template-columns:repeat(2,1fr);gap:20px}}
  .check-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    padding:22px;display:flex;gap:16px;align-items:flex-start;
    transition:transform .22s cubic-bezier(.2,.8,.2,1),box-shadow .22s ease,border-color .22s ease;
  }
  .check-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(108,77,246,.24)}
  .check-ico{
    flex:none;width:40px;height:40px;border-radius:14px;
    background:var(--grad-soft);border:1px solid rgba(108,77,246,.18);
    display:grid;place-items:center;color:var(--brand-700);
  }
  .check-ico svg{width:20px;height:20px}
  .check-card h3{font-size:16.5px;font-weight:600;line-height:1.45}
  .check-card p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--ink-2)}

  /* ---------- FAQ ---------- */
  .faq-grid{display:grid;gap:16px;margin-top:28px}
  @media (min-width:1024px){.faq-grid{grid-template-columns:repeat(2,1fr);gap:20px;align-items:start}}
  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    padding:0 20px;transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item:hover{border-color:rgba(108,77,246,.24)}
  .faq-item[open]{border-color:rgba(108,77,246,.28);box-shadow:var(--shadow-1)}
  .faq-item summary{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 0;font-size:16px;font-weight:600;color:var(--ink);
    cursor:pointer;list-style:none;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::after{
    content:"+";flex:none;width:28px;height:28px;border-radius:999px;
    background:var(--grad-main);color:#fff;
    display:grid;place-items:center;font-size:16px;font-weight:700;line-height:1;
  }
  .faq-item[open] summary::after{content:"−"}
  .faq-body{padding:0 0 18px;font-size:15px;line-height:1.8;color:var(--ink-2)}

  /* ---------- 相关阅读 ---------- */
  .read-grid{display:grid;gap:20px;margin-top:28px}
  @media (min-width:768px){.read-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
  @media (min-width:1024px){.read-grid{grid-template-columns:repeat(3,1fr)}}
  .read-card{
    display:flex;flex-direction:column;background:#fff;
    border:1px solid var(--line);border-radius:var(--r-lg);
    overflow:hidden;
    transition:transform .24s cubic-bezier(.2,.8,.2,1),box-shadow .24s ease;
  }
  .read-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
  .read-thumb{position:relative;overflow:hidden}
  .read-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s cubic-bezier(.2,.8,.2,1)}
  .read-card:hover .read-thumb img{transform:scale(1.04)}
  .read-badge{
    position:absolute;top:12px;left:12px;
    background:rgba(255,255,255,.88);color:var(--brand-700);
    font-size:11.5px;font-weight:600;border-radius:999px;padding:4px 10px;
  }
  .read-body{padding:18px 20px 22px}
  .read-body h3{font-size:17px;font-weight:600;line-height:1.45;transition:color .2s ease}
  .read-card:hover .read-body h3{color:var(--brand-700)}
  .read-body p{margin-top:8px;font-size:14px;line-height:1.7;color:var(--ink-2)}
  .read-meta{
    margin-top:14px;display:flex;align-items:center;justify-content:space-between;
    font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;
  }
  .read-meta svg{width:15px;height:15px;color:var(--brand-600)}

  /* ---------- CTA ---------- */
  .cta-band{
    background:var(--grad-main);
    border-radius:var(--r-xl);
    padding:34px 26px;
    display:grid;gap:24px;align-items:center;
    box-shadow:var(--shadow-2);
  }
  @media (min-width:1024px){.cta-band{grid-template-columns:1fr auto;padding:48px 56px;gap:40px}}
  .cta-band h2{font-size:clamp(21px,3.2vw,30px);font-weight:800;color:#fff;line-height:1.3;letter-spacing:-.01em}
  .cta-band p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.88);max-width:620px}
  .cta-trust{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
  .cta-trust span{
    font-size:12.5px;font-weight:600;color:#fff;
    border:1px solid rgba(255,255,255,.42);border-radius:999px;padding:5px 12px;
  }
  .cta-band .btn-light{
    background:#fff;color:var(--brand-700);border-color:#fff;height:52px;padding:0 30px;
  }
  .cta-band .btn-light:hover{transform:translateY(-1px);box-shadow:0 18px 40px -18px rgba(0,0,0,.4)}

  /* ---------- 页脚 ---------- */
  .site-footer{
    position:relative;margin-top:72px;
    background:var(--panel);color:#fff;
    border-radius:24px 24px 0 0;
    padding:48px 0 22px;
    overflow:hidden;
  }
  @media (min-width:1024px){.site-footer{margin-top:96px;padding:64px 0 24px}}
  .site-footer::before{
    content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad-main);
  }
  .footer-grid{display:grid;gap:32px}
  @media (min-width:640px){.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:flex;align-items:center;gap:10px}
  .footer-main{color:#fff}
  .footer-sub{color:rgba(255,255,255,.55)}
  .footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:340px}
  .social-row{display:flex;gap:12px;margin-top:20px}
  .social-btn{
    width:36px;height:36px;border-radius:999px;
    border:1px solid rgba(255,255,255,.14);
    display:grid;place-items:center;color:rgba(255,255,255,.72);
    transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
  }
  .social-btn svg{width:18px;height:18px}
  .social-btn:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.3);transform:translateY(-2px)}
  .footer-col h4{font-size:13px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.04em}
  .footer-col ul{list-style:none;display:grid;gap:10px}
  .footer-col a{font-size:14px;color:rgba(255,255,255,.66);transition:color .2s ease}
  .footer-col a:hover{color:var(--brand-500)}
  .footer-bottom{
    margin-top:40px;padding-top:20px;
    border-top:1px solid rgba(255,255,255,.10);
    display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
    font-size:12px;color:rgba(255,255,255,.45);
  }

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

/* roulang page: category2 */
:root{
  --brand-700:#5A38E0;
  --brand-600:#6C4DF6;
  --brand-500:#8A70FF;
  --brand-050:#F1EDFF;
  --accent-500:#FF8A3D;
  --accent-400:#FFA566;
  --accent-050:#FFF1E6;
  --lime-400:#C6F24E;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --surface-2:#F4EFF9;
  --ink:#17131F;
  --ink-2:#4A4356;
  --ink-3:#857D92;
  --line:#E9E2F0;
  --panel:#171321;
  --grad-main:linear-gradient(135deg,#6C4DF6 0%,#8A70FF 45%,#FF8A3D 100%);
  --grad-soft:linear-gradient(135deg,rgba(108,77,246,.12),rgba(255,138,61,.12));
  --shadow-1:0 1px 2px rgba(23,19,31,.06),0 8px 24px -12px rgba(108,77,246,.18);
  --shadow-2:0 24px 60px -24px rgba(108,77,246,.35);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --r-xl:32px;
  --ease:cubic-bezier(.2,.8,.2,1);
}

*,*::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","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:1024px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:1280px){.container{padding-left:32px;padding-right:32px;}}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(251,248,244,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  height:60px;
}
@media (min-width:1024px){.nav-bar{height:76px;gap:24px;}}

.nav-side{display:flex;align-items:center;gap:14px;min-width:0;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}

.nav-desktop{display:none;}
@media (min-width:1024px){.nav-desktop{display:block;}}
.nav-list{display:flex;align-items:center;gap:28px;}
.nav-list li{list-style:none;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-2);
  transition:color .2s var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-2px;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--grad-main);
  transform:translateX(-50%);
  transition:width .24s 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%;}

.logo-lockup{
  display:inline-flex;
  align-items:center;
  gap:10px;
  justify-self:center;
  padding:4px 6px;
  border-radius:var(--r-md);
}
.logo-mark{
  width:38px;
  height:38px;
  flex:0 0 38px;
  display:grid;
  place-items:center;
  border-radius:12px;
  background:var(--grad-main);
  color:#fff;
  font-size:15px;
  font-weight:800;
  letter-spacing:-.02em;
  box-shadow:0 6px 18px -8px rgba(108,77,246,.7);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-main{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
.logo-sub{font-size:11px;font-weight:500;color:var(--ink-3);}

.menu-toggle{
  width:44px;height:44px;
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.menu-toggle span{
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--ink);
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.menu-toggle:hover{border-color:var(--brand-500);box-shadow:var(--shadow-1);}
.menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle.is-open span:nth-child(2){opacity:0;}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
@media (min-width:1024px){.menu-toggle{display:none;}}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:0;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  height:48px;
  padding:0 24px;
  transition:transform .18s var(--ease),box-shadow .22s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--grad-main);color:#fff;box-shadow:0 10px 26px -14px rgba(108,77,246,.85);}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-2);filter:brightness(1.04);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--surface);color:var(--ink);border:1.5px solid var(--line);}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-050);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-outline-white{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7);}
.btn-outline-white:hover{background:rgba(255,255,255,.14);}

.nav-cta{display:none;}
@media (min-width:1280px){.nav-cta{display:inline-flex;}}
.icon-cta{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:999px;
  background:var(--grad-main);
  color:#fff;
  box-shadow:0 10px 22px -12px rgba(108,77,246,.8);
  transition:transform .18s var(--ease);
}
.icon-cta svg{width:20px;height:20px;}
.icon-cta:hover{transform:translateY(-2px);}
@media (min-width:1280px){.icon-cta{display:none;}}

.drawer{
  position:fixed;
  inset:0 0 auto 0;
  z-index:80;
  background:var(--bg);
  border-bottom-left-radius:var(--r-xl);
  border-bottom-right-radius:var(--r-xl);
  box-shadow:var(--shadow-2);
  padding:18px 20px 26px;
  transform:translateY(-102%);
  transition:transform .3s var(--ease);
  max-height:100vh;
  overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);}
@media (min-width:1024px){.drawer{display:none;}}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.drawer-title{font-size:13px;font-weight:600;color:var(--ink-3);letter-spacing:.08em;}
.drawer-close{
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  font-size:22px;
  line-height:1;
  color:var(--ink-2);
}
.drawer-list li + li{border-top:1px solid var(--line);}
.drawer-list a{
  display:flex;
  align-items:center;
  min-height:48px;
  font-size:15.5px;
  font-weight:500;
  color:var(--ink-2);
}
.drawer-list a.is-active{color:var(--brand-700);font-weight:600;}
.drawer-cta{width:100%;margin-top:20px;}

/* ============ 页头 ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  background:var(--grad-soft),var(--bg);
  border-bottom:1px solid var(--line);
}
.page-hero::before,
.page-hero::after{
  content:"";
  position:absolute;
  border-radius:50%;
  filter:blur(60px);
  opacity:.5;
  pointer-events:none;
}
.page-hero::before{width:320px;height:320px;left:-80px;top:-120px;background:rgba(108,77,246,.35);}
.page-hero::after{width:280px;height:280px;right:-60px;bottom:-140px;background:rgba(255,138,61,.32);}
.page-hero-inner{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
  padding:40px 0 44px;
}
@media (min-width:1024px){
  .page-hero-inner{grid-template-columns:1.35fr .95fr;align-items:center;gap:48px;padding:56px 0 60px;}
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  color:var(--ink-3);
  margin-bottom:18px;
}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li + li::before{content:"›";color:var(--ink-3);}
.breadcrumb a:hover{color:var(--brand-700);}
.breadcrumb [aria-current="page"]{color:var(--ink-2);}

.page-hero h1{
  font-size:clamp(28px,5.2vw,48px);
  line-height:1.16;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:16px;
}
.page-hero h1 em{font-style:normal;color:var(--brand-700);}
.hero-summary{
  font-size:16px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:36em;
  margin-bottom:24px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
@media (max-width:520px){.hero-actions .btn{width:100%;}}

.hero-figure{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface-2);
  box-shadow:var(--shadow-1);
  aspect-ratio:16/10;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure figcaption{
  position:absolute;
  left:14px;bottom:14px;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.88);
  font-size:12px;
  font-weight:600;
  color:var(--brand-700);
}

/* ============ 数据徽章条 ============ */
.stat-strip{padding:36px 0 8px;}
@media (min-width:1024px){.stat-strip{padding:48px 0 12px;}}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
}
@media (min-width:1024px){.stat-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}}
.stat-badge{
  display:flex;
  align-items:center;
  gap:14px;
  padding:18px 20px;
  border-radius:var(--r-lg);
  background:var(--lime-400);
  color:var(--ink);
  box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease);
}
.stat-badge:hover{transform:scale(1.03);}
.stat-badge.is-alt{background:var(--surface);border:1px solid var(--line);color:var(--ink);}
.stat-num{
  font-size:28px;
  font-weight:800;
  line-height:1;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.stat-label{font-size:12.5px;font-weight:500;line-height:1.4;}

/* ============ 通用板块 ============ */
.section{padding:56px 0;}
@media (min-width:1024px){.section{padding:88px 0;}}
.section-head{margin-bottom:28px;max-width:760px;}
@media (min-width:1024px){.section-head{margin-bottom:40px;}}
.section-kicker{
  display:inline-block;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--brand-700);
  background:var(--brand-050);
  border-radius:999px;
  padding:5px 12px;
  margin-bottom:14px;
}
.section-head h2{
  font-size:clamp(22px,3.4vw,32px);
  line-height:1.28;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:12px;
}
.section-head p{font-size:15.5px;color:var(--ink-2);line-height:1.8;}

/* ============ 2×2 大卡 ============ */
.card-grid-2{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:768px){.card-grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}}
.feature-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.feature-media{overflow:hidden;background:var(--surface-2);aspect-ratio:16/9;border-bottom:1px solid var(--line);}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.feature-card:hover .feature-media img{transform:scale(1.04);}
.feature-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:14px;flex:1;}
@media (min-width:1024px){.feature-body{padding:26px 26px 28px;}}
.tag{
  align-self:flex-start;
  font-size:12px;
  font-weight:600;
  padding:4px 10px;
  border-radius:999px;
  background:var(--brand-050);
  color:var(--brand-700);
}
.feature-body h3{font-size:19px;line-height:1.45;font-weight:600;letter-spacing:-.01em;}
.point-list{display:flex;flex-direction:column;gap:10px;}
.point-list li{
  position:relative;
  padding-left:20px;
  font-size:14.5px;
  line-height:1.75;
  color:var(--ink-2);
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:8px;height:8px;
  border-radius:3px;
  background:var(--grad-main);
}
.link-arrow{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  font-weight:600;
  color:var(--brand-700);
  border-bottom:1px solid rgba(90,56,224,.3);
  padding-bottom:2px;
  align-self:flex-start;
  transition:border-color .2s var(--ease),gap .2s var(--ease);
}
.link-arrow:hover{border-color:var(--brand-700);gap:10px;}

/* ============ 六步自查 ============ */
.steps-band{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.step-list{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
  counter-reset:step;
}
@media (min-width:768px){.step-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}}
@media (min-width:1280px){.step-list{grid-template-columns:repeat(3,minmax(0,1fr));}}
.step-item{
  display:flex;
  gap:16px;
  padding:20px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-1);border-color:rgba(108,77,246,.28);}
.step-index{
  flex:0 0 40px;
  width:40px;height:40px;
  display:grid;place-items:center;
  border-radius:12px;
  background:var(--grad-main);
  color:#fff;
  font-size:15px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
}
.step-item h3{font-size:16.5px;font-weight:600;margin-bottom:6px;}
.step-item p{font-size:14px;line-height:1.7;color:var(--ink-2);}

/* ============ 提示原文对照 ============ */
.compare-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:1024px){.compare-grid{grid-template-columns:5fr 7fr;gap:32px;align-items:start;}}
.compare-aside{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  padding:26px;
  box-shadow:var(--shadow-1);
}
@media (min-width:1024px){.compare-aside{position:sticky;top:104px;}}
.compare-aside h3{font-size:19px;font-weight:600;margin-bottom:12px;}
.compare-aside p{font-size:14.5px;line-height:1.8;color:var(--ink-2);margin-bottom:16px;}
.compare-aside .tag{margin-right:8px;margin-bottom:8px;display:inline-block;}
.quote-list{display:flex;flex-direction:column;gap:12px;}
.quote-item{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  padding:18px 20px;
  background:var(--surface);
  border:1px solid var(--line);
  border-left:4px solid var(--brand-600);
  border-radius:0 var(--r-md) var(--r-md) 0;
  transition:background-color .2s var(--ease),transform .2s var(--ease);
}
@media (min-width:768px){.quote-item{grid-template-columns:1fr 1.2fr;gap:20px;align-items:center;}}
.quote-item:hover{background:var(--surface-2);transform:translateX(3px);}
.quote-raw{
  font-size:14.5px;
  font-weight:600;
  color:var(--ink);
  font-variant-numeric:tabular-nums;
}
.quote-fix{font-size:14px;line-height:1.7;color:var(--ink-2);}

/* ============ FAQ ============ */
.faq-band{background:var(--surface-2);border-top:1px solid var(--line);}
.faq-grid{display:grid;grid-template-columns:1fr;gap:14px;}
@media (min-width:768px){.faq-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:0 20px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item[open]{border-color:rgba(108,77,246,.28);box-shadow:var(--shadow-1);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:56px;
  padding:16px 0;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  flex:0 0 28px;
  width:28px;height:28px;
  display:grid;place-items:center;
  border-radius:999px;
  background:var(--grad-main);
  color:#fff;
  font-size:16px;
  font-weight:700;
  line-height:1;
}
.faq-item[open] summary::after{content:"−";}
.faq-item p{
  font-size:15px;
  line-height:1.8;
  color:var(--ink-2);
  padding-bottom:18px;
  margin-top:-4px;
}

/* ============ CTA ============ */
.cta-band{padding:56px 0;}
@media (min-width:1024px){.cta-band{padding:88px 0;}}
.cta-card{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-xl);
  background:var(--grad-main);
  color:#fff;
  padding:32px 24px;
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  box-shadow:var(--shadow-2);
}
@media (min-width:1024px){
  .cta-card{grid-template-columns:1.4fr .8fr;align-items:center;gap:40px;padding:48px 48px;border-radius:32px;}
}
.cta-card h2{font-size:clamp(22px,3.2vw,30px);line-height:1.3;font-weight:700;margin-bottom:12px;}
.cta-card p{font-size:15.5px;line-height:1.8;color:rgba(255,255,255,.88);max-width:34em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
@media (max-width:520px){.cta-actions .btn{width:100%;}}
.cta-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:20px;
}
.cta-chip{
  font-size:12.5px;
  font-weight:600;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.28);
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--panel);
  color:rgba(255,255,255,.78);
  border-top:2px solid transparent;
  border-image:var(--grad-main) 1;
  border-radius:var(--r-lg) var(--r-lg) 0 0;
  padding:44px 0 24px;
  margin-top:8px;
}
@media (min-width:1024px){.site-footer{padding:64px 0 28px;}}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:30px;
}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-main{color:#fff;}
.footer-sub{color:rgba(255,255,255,.55);}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:32em;margin-bottom:18px;}
.social-row{display:flex;gap:10px;}
.social-btn{
  width:36px;height:36px;
  display:grid;place-items:center;
  border-radius:999px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);
  color:rgba(255,255,255,.8);
  transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.social-btn svg{width:17px;height:17px;}
.social-btn:hover{background:rgba(138,112,255,.28);color:#fff;transform:translateY(-2px);}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  color:rgba(255,255,255,.92);
  letter-spacing:.04em;
  margin-bottom:14px;
}
.footer-col li + li{margin-top:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--brand-500);}
.footer-bottom{
  margin-top:34px;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;
  flex-direction:column;
  gap:8px;
  font-size:12px;
  color:rgba(255,255,255,.5);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}

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

/* roulang page: category3 */
:root{
    --brand-700:#5A38E0;
    --brand-600:#6C4DF6;
    --brand-500:#8A70FF;
    --brand-050:#F1EDFF;
    --accent-500:#FF8A3D;
    --accent-400:#FFA566;
    --accent-050:#FFF1E6;
    --lime-400:#C6F24E;
    --bg:#FBF8F4;
    --surface:#FFFFFF;
    --surface-2:#F4EFF9;
    --ink:#17131F;
    --ink-2:#4A4356;
    --ink-3:#857D92;
    --line:#E9E2F0;
    --panel:#171321;
    --grad-main:linear-gradient(135deg,#6C4DF6 0%,#8A70FF 45%,#FF8A3D 100%);
    --grad-soft:linear-gradient(135deg,rgba(108,77,246,.12),rgba(255,138,61,.12));
    --shadow-1:0 1px 2px rgba(23,19,31,.06),0 8px 24px -12px rgba(108,77,246,.18);
    --shadow-2:0 24px 60px -24px rgba(108,77,246,.35);
    --r-sm:10px;
    --r-md:16px;
    --r-lg:24px;
    --r-xl:32px;
    --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body.is-locked{overflow:hidden}
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  ul,ol{margin:0;padding:0;list-style:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}
  .tabular{font-variant-numeric:tabular-nums}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){.container{padding:0 24px}}
  @media (min-width:1280px){.container{padding:0 32px}}

  /* ---------- Header / Nav ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(251,248,244,.82);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .22s cubic-bezier(.2,.8,.2,1);
  }
  .site-header.is-scrolled{box-shadow:var(--shadow-1)}
  .nav-bar{
    display:grid;
    grid-template-columns:1fr auto 1fr;
    align-items:center;
    gap:12px;
    min-height:60px;
  }
  @media (min-width:1024px){.nav-bar{min-height:76px;gap:16px}}
  .nav-side{display:flex;align-items:center;gap:20px}
  .nav-left{justify-content:flex-start}
  .nav-right{justify-content:flex-end}
  .nav-desktop{display:none}
  @media (min-width:1024px){.nav-desktop{display:block}}
  .nav-list{display:flex;align-items:center;gap:28px}
  .nav-link{
    position:relative;
    display:inline-block;
    padding:6px 0;
    font-size:15px;
    font-weight:500;
    color:var(--ink-2);
    transition:color .2s cubic-bezier(.2,.8,.2,1);
  }
  .nav-link::after{
    content:"";
    position:absolute;left:50%;bottom:0;
    width:0;height:2px;border-radius:2px;
    background:var(--grad-main);
    transform:translateX(-50%);
    transition:width .24s cubic-bezier(.2,.8,.2,1);
  }
  .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%}

  .logo-lockup{display:flex;align-items:center;gap:10px;justify-self:center;min-width:0}
  .logo-mark{
    width:38px;height:38px;border-radius:12px;
    background:var(--grad-main);
    color:#fff;display:grid;place-items:center;
    font-size:15px;font-weight:800;letter-spacing:.02em;
    box-shadow:0 10px 22px -12px rgba(108,77,246,.85);
    flex:0 0 auto;
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
  .logo-main{font-size:15px;font-weight:700;color:var(--ink);white-space:nowrap}
  .logo-sub{font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.02em;white-space:nowrap}
  @media (max-width:400px){.logo-sub{font-size:10px}}

  .menu-toggle{
    display:grid;gap:5px;place-content:center;
    width:44px;height:44px;border-radius:12px;
    transition:background .2s;
  }
  .menu-toggle:hover{background:var(--brand-050)}
  .menu-toggle span{display:block;width:22px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s,opacity .22s}
  @media (min-width:1024px){.menu-toggle{display:none}}

  .icon-cta{
    display:inline-grid;place-items:center;
    width:44px;height:44px;border-radius:999px;
    background:var(--grad-main);color:#fff;
    box-shadow:var(--shadow-1);
    transition:transform .2s,box-shadow .2s,filter .2s;
  }
  .icon-cta svg{width:20px;height:20px}
  .icon-cta:hover{transform:translateY(-1px);box-shadow:var(--shadow-2);filter:brightness(1.04)}
  @media (min-width:1024px){.icon-cta{display:none}}

  .nav-cta{display:none}
  @media (min-width:1024px){.nav-cta{display:inline-flex}}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:999px;
    font-size:15px;font-weight:600;line-height:1;
    border:1.5px solid transparent;
    transition:transform .2s cubic-bezier(.2,.8,.2,1),box-shadow .2s,background .2s,border-color .2s,color .2s,filter .2s;
    cursor:pointer;
  }
  .btn-sm{height:40px;padding:0 18px;font-size:14px}
  .btn-primary{background:var(--grad-main);color:#fff;box-shadow:var(--shadow-1)}
  .btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-2);filter:brightness(1.04)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
  .btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-050)}
  .btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
  .btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-1px)}
  .btn-block{width:100%}
  @media (min-width:640px){.btn-block{width:auto}}

  .text-link{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;font-weight:600;color:var(--brand-700);
    border-bottom:1px solid rgba(90,56,224,.3);
    padding-bottom:2px;
    transition:border-color .2s,color .2s;
  }
  .text-link svg{width:16px;height:16px;transition:transform .22s cubic-bezier(.2,.8,.2,1)}
  .text-link:hover{border-color:var(--brand-700)}
  .text-link:hover svg{transform:translateX(4px)}

  /* ---------- Drawer ---------- */
  .drawer{
    position:fixed;left:0;right:0;top:0;
    height:100vh;z-index:80;
    background:var(--surface);
    padding:18px 20px 28px;
    display:flex;flex-direction:column;gap:10px;
    transform:translateY(-102%);
    transition:transform .3s cubic-bezier(.2,.8,.2,1);
    overflow-y:auto;
  }
  .drawer.is-open{transform:translateY(0)}
  @media (min-width:1024px){.drawer{display:none}}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:12px;border-bottom:1px solid var(--line)}
  .drawer-title{font-size:15px;font-weight:700}
  .drawer-close{width:44px;height:44px;border-radius:12px;font-size:26px;line-height:1;color:var(--ink-2)}
  .drawer-close:hover{background:var(--brand-050)}
  .drawer-list{display:flex;flex-direction:column;margin-top:6px}
  .drawer-list a{
    display:flex;align-items:center;min-height:48px;
    font-size:16px;font-weight:500;color:var(--ink-2);
    border-bottom:1px solid var(--line);
    transition:color .2s,padding-left .2s;
  }
  .drawer-list a:hover{color:var(--brand-700);padding-left:4px}
  .drawer-list a.is-active{color:var(--brand-700);font-weight:700}
  .drawer-cta{margin-top:auto}

  /* ---------- Page hero ---------- */
  .page-hero{position:relative;overflow:hidden;background:var(--grad-soft);border-bottom:1px solid var(--line)}
  .page-hero::before,
  .page-hero::after{content:"";position:absolute;border-radius:50%;filter:blur(70px);pointer-events:none}
  .page-hero::before{width:340px;height:340px;background:rgba(108,77,246,.16);top:-140px;left:-100px}
  .page-hero::after{width:300px;height:300px;background:rgba(255,138,61,.14);bottom:-150px;right:-90px}
  .page-hero__inner{position:relative;z-index:1;padding:28px 0 52px}
  @media (min-width:1024px){.page-hero__inner{padding:36px 0 84px}}

  .breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:12px;color:var(--ink-3)}
  .breadcrumb li{display:flex;align-items:center;gap:6px}
  .breadcrumb li+li::before{content:"›";color:var(--ink-3)}
  .breadcrumb a{transition:color .2s}
  .breadcrumb a:hover{color:var(--brand-700)}
  .breadcrumb [aria-current="page"]{color:var(--ink-2)}

  .page-hero__grid{display:grid;gap:30px;margin-top:22px;align-items:center}
  @media (min-width:1024px){.page-hero__grid{grid-template-columns:1.1fr .9fr;gap:52px;margin-top:32px}}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:999px;
    background:var(--brand-050);color:var(--brand-700);
    font-size:12px;font-weight:600;letter-spacing:.02em;
  }
  .badge-accent{background:var(--accent-050);color:#B25A15}
  .badge-lime{background:var(--lime-400);color:#20310A}

  .page-hero h1{
    margin-top:16px;
    font-size:clamp(28px,6.2vw,46px);
    line-height:1.14;
    font-weight:800;
    letter-spacing:-.02em;
  }
  .page-hero .lede{margin-top:18px;font-size:16px;line-height:1.85;color:var(--ink-2);max-width:38em}
  @media (min-width:1024px){.page-hero .lede{font-size:18px}}

  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
  @media (max-width:519px){.hero-actions .btn{width:100%}}

  .page-hero__media img{
    width:100%;aspect-ratio:16/10;object-fit:cover;
    border-radius:var(--r-xl);
    border:1px solid var(--line);
    box-shadow:var(--shadow-2);
  }
  .media-caption{margin-top:12px;font-size:12px;color:var(--ink-3);text-align:center}

  .hero-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:28px;max-width:520px}
  .fact{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
    padding:14px 12px;box-shadow:var(--shadow-1);
  }
  .fact-num{font-size:20px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--brand-700);line-height:1.1}
  @media (min-width:1024px){.fact-num{font-size:26px}}
  .fact-label{margin-top:4px;font-size:11px;color:var(--ink-3)}

  /* ---------- Section ---------- */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section--alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

  .section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:30px}
  @media (min-width:1024px){.section-head{margin-bottom:40px}}
  .eyebrow{display:block;font-size:12px;font-weight:600;color:var(--brand-700);letter-spacing:.1em;margin-bottom:10px}
  .section-head h2{font-size:clamp(22px,4vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em;max-width:22em}
  .section-sub{margin-top:12px;font-size:15px;color:var(--ink-2);max-width:44em}

  /* ---------- Clip rail ---------- */
  .clip-rail{
    display:flex;gap:16px;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    padding:6px 4px 18px;
    scrollbar-width:thin;
  }
  .clip-rail::-webkit-scrollbar{height:4px}
  .clip-rail::-webkit-scrollbar-track{background:transparent}
  .clip-rail::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px}
  @media (max-width:1023px){.clip-rail::-webkit-scrollbar{display:none}}

  .clip-card{flex:0 0 auto;width:164px;scroll-snap-align:start}
  @media (min-width:768px){.clip-card{width:188px}}
  @media (min-width:1024px){.clip-card{width:200px}}

  .clip-media{
    position:relative;
    aspect-ratio:3/4;
    border-radius:20px;
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--surface-2);
    box-shadow:var(--shadow-1);
    transition:transform .24s cubic-bezier(.2,.8,.2,1),box-shadow .24s;
  }
  .clip-card:hover .clip-media{transform:translateY(-4px);box-shadow:var(--shadow-2)}
  .clip-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s cubic-bezier(.2,.8,.2,1)}
  .clip-card:hover .clip-media img{transform:scale(1.04)}
  .clip-media::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:56%;
    background:linear-gradient(to top,rgba(23,19,31,.88),rgba(23,19,31,0));
  }
  .clip-num{
    position:absolute;top:12px;left:12px;z-index:2;
    padding:3px 10px;border-radius:999px;
    background:rgba(255,255,255,.9);color:var(--brand-700);
    font-size:11px;font-weight:700;font-variant-numeric:tabular-nums;
  }
  .clip-title{
    position:absolute;left:12px;right:12px;bottom:14px;z-index:2;
    color:#fff;font-size:14px;font-weight:600;line-height:1.45;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .clip-note{margin-top:10px;font-size:13px;line-height:1.65;color:var(--ink-3)}

  /* ---------- Timeline ---------- */
  .timeline-layout{display:grid;gap:28px}
  @media (min-width:1024px){.timeline-layout{grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start}}

  .timeline{position:relative;padding-left:30px}
  .timeline::before{
    content:"";position:absolute;left:7px;top:14px;bottom:14px;width:2px;border-radius:2px;
    background:linear-gradient(to bottom,var(--brand-500),var(--accent-400));
  }
  .tl-item{position:relative;padding:14px 0 18px}
  .tl-item + .tl-item{border-top:1px solid var(--line)}
  .tl-dot{
    position:absolute;left:-30px;top:22px;
    width:16px;height:16px;border-radius:50%;
    background:var(--surface);
    border:3px solid var(--brand-600);
    box-shadow:0 0 0 4px rgba(108,77,246,.12);
  }
  .tl-item:last-child .tl-dot{border-color:var(--accent-500);box-shadow:0 0 0 4px rgba(255,138,61,.16)}
  .tl-time{
    display:inline-block;margin-bottom:8px;
    padding:3px 10px;border-radius:999px;
    background:var(--surface-2);color:var(--ink-2);
    font-size:12px;font-weight:600;font-variant-numeric:tabular-nums;
  }
  .tl-item h3{font-size:17px;font-weight:600;line-height:1.45}
  @media (min-width:1024px){.tl-item h3{font-size:19px}}
  .tl-item p{margin-top:8px;font-size:15px;line-height:1.8;color:var(--ink-2)}

  .stick-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:24px;
    box-shadow:var(--shadow-1);
  }
  @media (min-width:1024px){.stick-card{position:sticky;top:104px}}
  .stick-card h3{font-size:17px;font-weight:700}
  .check-list{margin-top:16px;display:grid;gap:12px}
  .check-list li{display:flex;gap:10px;font-size:14px;line-height:1.65;color:var(--ink-2)}
  .check-list li::before{
    content:"";flex:0 0 auto;width:18px;height:18px;margin-top:3px;border-radius:6px;
    background:var(--grad-main);
    box-shadow:inset 0 0 0 5px rgba(255,255,255,.85);
  }
  .stick-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:12px;color:var(--ink-3);line-height:1.7}

  /* ---------- Risk panel ---------- */
  .risk-panel{
    position:relative;overflow:hidden;
    background:var(--panel);
    border-radius:var(--r-xl);
    padding:32px 24px;
    color:#fff;
  }
  @media (min-width:1024px){.risk-panel{padding:48px}}
  .risk-panel::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background:linear-gradient(135deg,rgba(108,77,246,.22),rgba(255,138,61,.12));
  }
  .risk-panel > *{position:relative;z-index:1}
  .risk-panel h2{font-size:clamp(22px,4vw,32px);line-height:1.3;font-weight:700}
  .risk-panel .risk-sub{margin-top:14px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.74);max-width:42em}
  .risk-grid{display:grid;gap:16px;margin-top:30px}
  @media (min-width:768px){.risk-grid{grid-template-columns:1fr 1fr;gap:20px}}
  .risk-card{
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.12);
    border-radius:20px;
    padding:20px;
    transition:transform .24s cubic-bezier(.2,.8,.2,1),background .24s,border-color .24s;
  }
  .risk-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.22)}
  .risk-tag{
    display:inline-block;margin-bottom:14px;
    padding:3px 10px;border-radius:999px;
    background:rgba(198,242,78,.16);color:var(--lime-400);
    font-size:11px;font-weight:700;letter-spacing:.04em;
  }
  .risk-card h3{font-size:16px;font-weight:600;line-height:1.5;color:#fff}
  .risk-card p{margin-top:10px;font-size:14px;line-height:1.75;color:rgba(255,255,255,.72)}

  /* ---------- FAQ ---------- */
  .faq-grid{display:grid;gap:14px}
  @media (min-width:1024px){.faq-grid{grid-template-columns:1fr 1fr;gap:18px;align-items:start}}
  .faq-item{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    padding:16px 20px;
    transition:border-color .22s,box-shadow .22s;
  }
  .faq-item[open]{border-color:rgba(108,77,246,.28);box-shadow:var(--shadow-1)}
  .faq-item summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    font-size:16px;font-weight:600;line-height:1.55;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-sign{
    flex:0 0 auto;width:28px;height:28px;border-radius:50%;
    background:var(--grad-main);color:#fff;
    display:grid;place-items:center;
    font-size:16px;font-weight:700;line-height:1;
  }
  .faq-sign::before{content:"+"}
  .faq-item[open] .faq-sign::before{content:"−"}
  .faq-body{padding-top:14px;font-size:15px;line-height:1.85;color:var(--ink-2)}

  /* ---------- CTA band ---------- */
  .cta-band{
    background:var(--grad-main);
    border-radius:var(--r-xl);
    padding:32px 24px;
    color:#fff;
    display:grid;gap:24px;
    box-shadow:var(--shadow-2);
  }
  @media (min-width:1024px){.cta-band{grid-template-columns:1fr auto;align-items:center;gap:40px;padding:48px}}
  .cta-band h2{font-size:clamp(22px,3.6vw,32px);line-height:1.28;font-weight:700}
  .cta-band p{margin-top:14px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.85);max-width:40em}
  .cta-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
  .cta-tag{
    padding:5px 12px;border-radius:999px;
    background:rgba(255,255,255,.16);
    border:1px solid rgba(255,255,255,.24);
    font-size:12px;font-weight:600;
  }
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}
  @media (max-width:639px){.cta-actions .btn{width:100%}}

  /* ---------- Related cards ---------- */
  .card-grid{display:grid;gap:20px}
  @media (min-width:640px){.card-grid{grid-template-columns:1fr 1fr}}
  @media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
  .card{
    display:flex;flex-direction:column;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    overflow:hidden;
    box-shadow:var(--shadow-1);
    transition:transform .24s cubic-bezier(.2,.8,.2,1),box-shadow .24s,border-color .24s;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(108,77,246,.24)}
  .card-media{position:relative;overflow:hidden;background:var(--surface-2)}
  .card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .45s cubic-bezier(.2,.8,.2,1)}
  .card:hover .card-media img{transform:scale(1.04)}
  .card-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
  .card-body h3{font-size:17px;font-weight:600;line-height:1.45;transition:color .2s}
  .card:hover .card-body h3{color:var(--brand-700)}
  .card-body p{font-size:14px;line-height:1.75;color:var(--ink-2)}
  .card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--ink-3)}
  .card-foot svg{width:16px;height:16px;color:var(--brand-600);transition:transform .22s}
  .card:hover .card-foot svg{transform:translateX(4px)}

  /* ---------- Footer ---------- */
  .site-footer{
    position:relative;
    margin-top:0;
    background:var(--panel);
    color:rgba(255,255,255,.78);
    padding:48px 0 24px;
    border-radius:24px 24px 0 0;
    overflow:hidden;
  }
  @media (min-width:1024px){.site-footer{padding:64px 0 28px;border-radius:28px 28px 0 0}}
  .site-footer::before{
    content:"";position:absolute;left:0;right:0;top:0;height:2px;
    background:var(--grad-main);
  }
  .site-footer::after{
    content:"";position:absolute;width:420px;height:420px;border-radius:50%;
    background:rgba(108,77,246,.18);filter:blur(90px);
    top:-180px;right:-120px;pointer-events:none;
  }
  .footer-grid{position:relative;z-index:1;display:grid;gap:32px}
  @media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:36px}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
  .footer-brand{display:flex;align-items:center;gap:10px}
  .footer-main{color:#fff}
  .footer-sub{color:rgba(255,255,255,.56)}
  .footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:28em}
  .social-row{display:flex;gap:10px;margin-top:20px}
  .social-btn{
    width:36px;height:36px;border-radius:50%;
    display:grid;place-items:center;
    background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.14);
    color:rgba(255,255,255,.8);
    transition:background .2s,color .2s,transform .2s;
  }
  .social-btn svg{width:18px;height:18px}
  .social-btn:hover{background:rgba(138,112,255,.28);color:#fff;transform:translateY(-2px)}
  .footer-col h4{font-size:13px;font-weight:600;color:#fff;letter-spacing:.04em;margin-bottom:14px}
  .footer-col ul{display:grid;gap:10px}
  .footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .2s}
  .footer-col a:hover{color:var(--brand-500)}
  .footer-bottom{
    position:relative;z-index:1;
    margin-top:36px;padding-top:20px;
    border-top:1px solid rgba(255,255,255,.1);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:12px;color:rgba(255,255,255,.5);
  }

  /* ---------- Reveal ---------- */
  .reveal{opacity:0;transform:translateY(18px);transition:opacity .5s cubic-bezier(.2,.8,.2,1),transform .5s cubic-bezier(.2,.8,.2,1)}
  .reveal.is-in{opacity:1;transform:none}

  @media (prefers-reduced-motion:reduce){
    *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
    .reveal{opacity:1;transform:none}
  }

/* roulang page: category4 */
:root{
    --brand-700:#5A38E0; --brand-600:#6C4DF6; --brand-500:#8A70FF; --brand-050:#F1EDFF;
    --accent-500:#FF8A3D; --accent-400:#FFA566; --accent-050:#FFF1E6;
    --lime-400:#C6F24E;
    --bg:#FBF8F4; --surface:#FFFFFF; --surface-2:#F4EFF9;
    --ink:#17131F; --ink-2:#4A4356; --ink-3:#857D92; --line:#E9E2F0;
    --panel:#171321;
    --grad-main:linear-gradient(135deg,#6C4DF6 0%,#8A70FF 45%,#FF8A3D 100%);
    --grad-soft:linear-gradient(135deg,rgba(108,77,246,.12),rgba(255,138,61,.12));
    --shadow-1:0 1px 2px rgba(23,19,31,.06), 0 8px 24px -12px rgba(108,77,246,.18);
    --shadow-2:0 24px 60px -24px rgba(108,77,246,.35);
    --r-s:10px; --r-m:16px; --r-l:24px; --r-xl:32px;
    --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.75;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;transition:color .22s cubic-bezier(.2,.8,.2,1);}
  button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  :focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
  @media (min-width:1024px){ .container{padding:0 24px;} }
  @media (min-width:1280px){ .container{padding:0 32px;} }

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(251,248,244,.82);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .24s cubic-bezier(.2,.8,.2,1);
  }
  .site-header.is-scrolled{box-shadow:var(--shadow-1);}
  .nav-bar{
    display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
    gap:16px;height:60px;
  }
  @media (min-width:1024px){ .nav-bar{height:76px;gap:24px;} }
  .nav-side{display:flex;align-items:center;gap:12px;min-width:0;}
  .nav-right{justify-content:flex-end;}
  .nav-desktop{display:none;}
  @media (min-width:1024px){ .nav-desktop{display:block;} }
  .nav-list{display:flex;align-items:center;gap:28px;}
  .nav-link{
    position:relative;display:inline-block;
    font-size:15px;font-weight:500;color:var(--ink-2);
    padding:6px 0;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:0;height:2px;width:0;
    background:var(--grad-main);border-radius:2px;
    transform:translateX(-50%);transition:width .24s cubic-bezier(.2,.8,.2,1);
  }
  .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%;}

  .logo-lockup{display:flex;align-items:center;gap:10px;justify-self:center;}
  .logo-mark{
    display:flex;align-items:center;justify-content:center;
    width:38px;height:38px;flex:0 0 38px;border-radius:12px;
    background:var(--grad-main);color:#fff;
    font-size:15px;font-weight:800;letter-spacing:-.02em;
    box-shadow:var(--shadow-1);
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.15;}
  .logo-main{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
  .logo-sub{font-size:11px;font-weight:500;color:var(--ink-3);}
  @media (max-width:1023px){ .logo-sub{display:none;} }

  .menu-toggle{
    display:flex;flex-direction:column;justify-content:center;gap:5px;
    width:44px;height:44px;border-radius:12px;
    align-items:center;border:1px solid var(--line);background:rgba(255,255,255,.7);
  }
  .menu-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease,opacity .22s ease;}
  @media (min-width:1024px){ .menu-toggle{display:none;} }
  .menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:999px;
    font-size:15px;font-weight:600;line-height:1;
    transition:transform .2s cubic-bezier(.2,.8,.2,1),box-shadow .2s cubic-bezier(.2,.8,.2,1),background-color .2s,color .2s,border-color .2s;
    white-space:nowrap;
  }
  .btn-sm{height:36px;padding:0 16px;font-size:14px;}
  .btn-primary{background:var(--grad-main);color:#fff;box-shadow:var(--shadow-1);}
  .btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-2);filter:brightness(1.04);}
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line);}
  .btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-050);color:var(--brand-700);}
  .btn-outline-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.75);}
  .btn-outline-light:hover{background:#fff;color:var(--brand-700);border-color:#fff;}
  .btn-lg{height:52px;padding:0 30px;font-size:16px;}
  .nav-cta{display:none;}
  @media (min-width:1024px){ .nav-cta{display:inline-flex;margin-left:8px;} }
  .icon-cta{
    display:flex;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:999px;background:var(--grad-main);color:#fff;
  }
  .icon-cta svg{width:20px;height:20px;}
  @media (min-width:1024px){ .icon-cta{display:none;} }

  /* 抽屉 */
  .drawer{
    display:none;position:fixed;inset:0;z-index:80;
    background:rgba(251,248,244,.98);backdrop-filter:blur(10px);
    flex-direction:column;padding:16px 20px 28px;
  }
  .drawer.is-open{display:flex;}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:12px;border-bottom:1px solid var(--line);}
  .drawer-title{font-size:14px;font-weight:600;color:var(--ink-3);letter-spacing:.08em;}
  .drawer-close{width:44px;height:44px;border-radius:999px;font-size:26px;line-height:1;color:var(--ink-2);background:var(--surface-2);}
  .drawer-list{margin-top:8px;flex:1;}
  .drawer-list li{border-bottom:1px solid var(--line);}
  .drawer-list a{display:flex;align-items:center;height:48px;font-size:16px;font-weight:500;color:var(--ink-2);}
  .drawer-list a.is-active{color:var(--brand-700);font-weight:700;}
  .drawer-cta{width:100%;}
  body.no-scroll{overflow:hidden;}

  /* ---------- 页头 ---------- */
  .page-head{
    position:relative;overflow:hidden;
    background-image:linear-gradient(120deg,rgba(23,19,31,.78),rgba(90,56,224,.62)),url("/assets/images/backpic/back-2.png");
    background-size:cover;background-position:center;
    color:#fff;
  }
  .page-head-inner{padding:44px 0 52px;position:relative;z-index:2;}
  @media (min-width:1024px){ .page-head-inner{padding:72px 0 84px;} }
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:12px;color:rgba(255,255,255,.72);margin-bottom:18px;}
  .breadcrumb a:hover{color:#fff;}
  .breadcrumb .sep{opacity:.6;}
  .breadcrumb .current{color:rgba(255,255,255,.94);}
  .page-head h1{
    font-size:clamp(26px,5.6vw,46px);line-height:1.16;font-weight:800;letter-spacing:-.02em;
    max-width:820px;
  }
  .page-head p{
    margin-top:16px;max-width:660px;
    font-size:16px;line-height:1.8;color:rgba(255,255,255,.86);
  }
  @media (min-width:1024px){ .page-head p{font-size:18px;} }
  .head-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
  .chip{
    display:inline-flex;align-items:center;gap:6px;
    padding:6px 12px;border-radius:999px;
    background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
    font-size:12px;font-weight:600;color:#fff;
  }
  .head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}

  /* ---------- 通用区块 ---------- */
  .section{padding:56px 0;}
  @media (min-width:1024px){ .section{padding:88px 0;} }
  .section-head{margin-bottom:32px;max-width:760px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;font-weight:600;color:var(--brand-700);
    background:var(--brand-050);border-radius:999px;padding:5px 12px;margin-bottom:14px;
  }
  .section-head h2{font-size:clamp(22px,4vw,32px);line-height:1.26;font-weight:700;}
  .section-head p{margin-top:12px;color:var(--ink-2);font-size:15px;}
  .divider{height:1px;background:var(--line);border:0;margin:0;}

  /* 正文 + 侧栏布局 */
  .layout{display:grid;grid-template-columns:1fr;gap:32px;}
  @media (min-width:1024px){
    .layout{grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;}
  }
  .article-body{max-width:760px;}
  .num-section + .num-section{margin-top:44px;padding-top:40px;border-top:1px solid var(--line);}
  .num-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:16px;}
  .num-badge{
    flex:0 0 auto;display:flex;align-items:center;justify-content:center;
    width:42px;height:42px;border-radius:14px;
    background:var(--grad-main);color:#fff;
    font-size:15px;font-weight:800;font-variant-numeric:tabular-nums;
    box-shadow:var(--shadow-1);
  }
  .num-head h2{font-size:clamp(20px,3.4vw,27px);line-height:1.32;font-weight:700;padding-top:5px;}
  .article-body p{font-size:15.5px;line-height:1.85;color:var(--ink-2);margin-bottom:20px;}
  @media (min-width:1024px){ .article-body p{font-size:16.5px;} }
  .article-body strong{color:var(--ink);font-weight:600;}
  .article-body a.inline-link{color:var(--brand-700);text-decoration:underline;text-decoration-color:rgba(90,56,224,.3);text-underline-offset:3px;}
  .article-body a.inline-link:hover{text-decoration-color:var(--brand-700);}

  .step-list{counter-reset:step;margin:8px 0 22px;}
  .step-list li{
    position:relative;padding:14px 16px 14px 52px;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);
    margin-bottom:12px;font-size:15px;color:var(--ink-2);
    transition:transform .22s cubic-bezier(.2,.8,.2,1),box-shadow .22s,border-color .22s;
  }
  .step-list li::before{
    counter-increment:step;content:counter(step,decimal-leading-zero);
    position:absolute;left:16px;top:14px;
    font-size:13px;font-weight:800;color:var(--brand-700);
    background:var(--brand-050);border-radius:8px;padding:2px 7px;
    font-variant-numeric:tabular-nums;
  }
  .step-list li:hover{transform:translateY(-3px);box-shadow:var(--shadow-1);border-color:rgba(108,77,246,.28);}
  .step-list li b{color:var(--ink);}

  .note-card{
    display:flex;gap:14px;align-items:flex-start;
    background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-m);
    padding:18px 20px;margin:22px 0;
  }
  .note-card .dot{
    flex:0 0 auto;width:10px;height:10px;border-radius:999px;background:var(--accent-500);margin-top:8px;
  }
  .note-card p{margin:0;font-size:14.5px;color:var(--ink-2);}

  .table-wrap{overflow-x:auto;margin:22px 0;border:1px solid var(--line);border-radius:var(--r-m);background:var(--surface);}
  table{width:100%;border-collapse:collapse;min-width:520px;font-size:14.5px;}
  th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);color:var(--ink-2);}
  th{background:var(--surface-2);color:var(--ink);font-weight:600;font-size:13.5px;}
  tbody tr:last-child td{border-bottom:0;}
  td .tnum{font-variant-numeric:tabular-nums;color:var(--ink);font-weight:600;}

  /* 侧栏速查卡 */
  .side-col{display:flex;flex-direction:column;gap:20px;}
  @media (min-width:1024px){ .side-col{position:sticky;top:104px;} }
  .side-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);
    padding:22px;box-shadow:var(--shadow-1);
  }
  .side-card h3{font-size:17px;font-weight:700;margin-bottom:14px;}
  .side-card .side-sub{font-size:12.5px;color:var(--ink-3);margin-bottom:14px;}
  .term-list li{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;}
  .term-list li:last-child{border-bottom:0;}
  .term-list .k{color:var(--ink-3);}
  .term-list .v{color:var(--ink);font-weight:600;text-align:right;}
  .quick-list li{position:relative;padding-left:22px;font-size:14px;color:var(--ink-2);margin-bottom:12px;}
  .quick-list li::before{
    content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:3px;background:var(--grad-main);
  }
  .side-cta{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
  .side-cta .btn{width:100%;}

  /* 相关阅读 */
  .related-grid{display:grid;grid-template-columns:1fr;gap:20px;}
  @media (min-width:640px){ .related-grid{grid-template-columns:repeat(2,1fr);} }
  @media (min-width:1024px){ .related-grid{grid-template-columns:repeat(3,1fr);} }
  .rel-card{
    display:flex;flex-direction:column;background:var(--surface);
    border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;
    transition:transform .24s cubic-bezier(.2,.8,.2,1),box-shadow .24s,border-color .24s;
  }
  .rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(108,77,246,.24);}
  .rel-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2);border-bottom:1px solid var(--line);}
  .rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s cubic-bezier(.2,.8,.2,1);}
  .rel-card:hover .rel-thumb img{transform:scale(1.04);}
  .rel-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .tag{
    display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;
    background:var(--brand-050);color:var(--brand-700);font-size:12px;font-weight:600;
    align-self:flex-start;
  }
  .rel-body h3{font-size:17px;line-height:1.45;font-weight:600;transition:color .2s;}
  .rel-card:hover .rel-body h3{color:var(--brand-700);}
  .rel-body p{font-size:14px;color:var(--ink-2);line-height:1.7;}
  .rel-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;}

  /* FAQ */
  .faq-grid{display:grid;grid-template-columns:1fr;gap:16px;}
  @media (min-width:1024px){ .faq-grid{grid-template-columns:repeat(2,1fr);gap:20px;} }
  .faq-item{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);
    padding:0 20px;transition:border-color .22s,box-shadow .22s;
  }
  .faq-item[open]{border-color:rgba(108,77,246,.24);box-shadow:var(--shadow-1);}
  .faq-item summary{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 0;font-size:16px;font-weight:600;color:var(--ink);
    list-style:none;cursor:pointer;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"+";flex:0 0 auto;display:flex;align-items:center;justify-content:center;
    width:28px;height:28px;border-radius:999px;background:var(--grad-main);color:#fff;
    font-size:16px;font-weight:600;line-height:1;transition:transform .22s;
  }
  .faq-item[open] summary::after{content:"−";transform:rotate(180deg);}
  .faq-item .faq-answer{padding:0 0 18px;font-size:15px;line-height:1.8;color:var(--ink-2);}

  /* 底部 CTA */
  .cta-band{
    position:relative;overflow:hidden;border-radius:var(--r-xl);
    background:var(--grad-main);color:#fff;
    padding:36px 24px;box-shadow:var(--shadow-2);
    display:grid;grid-template-columns:1fr;gap:24px;align-items:center;
  }
  @media (min-width:1024px){ .cta-band{grid-template-columns:1.4fr .6fr;padding:52px 48px;} }
  .cta-band h2{font-size:clamp(22px,3.6vw,30px);line-height:1.28;font-weight:800;}
  .cta-band p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.9);max-width:620px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
  @media (min-width:1024px){ .cta-actions{justify-content:flex-end;} }

  /* 页脚 */
  .site-footer{
    background:var(--panel);color:#fff;margin-top:64px;
    border-top:2px solid transparent;
    border-image:linear-gradient(135deg,#6C4DF6,#8A70FF 45%,#FF8A3D) 1;
  }
  .footer-grid{
    display:grid;grid-template-columns:1fr;gap:28px;
    padding:44px 0 32px;
  }
  @media (min-width:768px){ .footer-grid{grid-template-columns:1.4fr 1fr 1fr;} }
  @media (min-width:1024px){ .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;padding:56px 0 40px;} }
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
  .footer-main{color:#fff;}
  .footer-sub{color:rgba(255,255,255,.55);}
  .footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:340px;}
  .social-row{display:flex;gap:10px;margin-top:18px;}
  .social-btn{
    display:flex;align-items:center;justify-content:center;
    width:36px;height:36px;border-radius:999px;
    background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);
    color:rgba(255,255,255,.82);
    transition:background-color .2s,color .2s,transform .2s;
  }
  .social-btn svg{width:18px;height:18px;}
  .social-btn:hover{background:rgba(138,112,255,.24);color:#fff;transform:translateY(-2px);}
  .footer-col h4{font-size:13px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.04em;}
  .footer-col li{margin-bottom:10px;}
  .footer-col a{font-size:14px;color:rgba(255,255,255,.68);}
  .footer-col a:hover{color:var(--brand-500);}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;
    padding:18px 0 26px;border-top:1px solid rgba(255,255,255,.10);
    font-size:12px;color:rgba(255,255,255,.5);
  }

  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
  }