/* roulang page: index */
:root{
  --primary:#1E1633;
  --primary-600:#2E2350;
  --primary-100:#EFEBFA;
  --accent-lime:#D8FF4A;
  --accent-coral:#FF5C39;
  --base:#F7F6F2;
  --surface:#FFFFFF;
  --surface-alt:#F1EFE9;
  --line:#E5E2DA;
  --line-strong:#CFCBC0;
  --text:#17151C;
  --text-muted:#6B6875;
  --text-inverse:#FFFFFF;
  --text-inverse-muted:#A9A5B8;
  --success:#1F9D6B;
  --warning:#E0A020;
  --danger:#D8452F;
  --info:#4A5BD6;
  --radius-card:16px;
  --radius-panel:28px;
  --radius-btn:10px;
  --radius-img:14px;
  --shadow-1:0 1px 2px rgba(30,22,51,.05), 0 12px 32px -14px rgba(30,22,51,.16);
  --shadow-2:0 2px 4px rgba(30,22,51,.06), 0 22px 48px -18px rgba(30,22,51,.24);
  --container:1200px;
  --gutter:24px;
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--base);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.01em;}
:focus-visible{outline:2px solid var(--accent-lime);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter);}
.section{padding:96px 0;}
.section--tight{padding:72px 0 96px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3;}
.section-head p{color:var(--text-muted);font-size:15px;margin-top:10px;max-width:620px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--primary);text-transform:uppercase;}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--accent-coral);}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--primary);border-bottom:1.5px solid var(--accent-lime);padding-bottom:3px;transition:border-width .15s ease,color .15s ease;}
.link-arrow:hover{border-bottom-width:3px;}
.link-arrow i{font-size:12px;transition:transform .2s ease;}
.link-arrow:hover i{transform:translateX(3px);}

/* ============ header / nav ============ */
.site-header{position:sticky;top:0;z-index:80;background:rgba(247,246,242,.92);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 10px 28px -22px rgba(30,22,51,.5);background:rgba(247,246,242,.98);}
.nav{display:flex;align-items:center;gap:20px;height:72px;transition:height .2s ease;}
.site-header.is-scrolled .nav{height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:32px;height:32px;border-radius:9px;background:var(--primary);color:var(--accent-lime);display:grid;place-items:center;font-weight:800;font-size:13px;letter-spacing:-.04em;font-family:var(--mono);}
.brand-text{display:flex;align-items:baseline;gap:8px;}
.brand-name{font-size:16px;font-weight:800;letter-spacing:-.02em;white-space:nowrap;}
.brand-sub{font-size:12.5px;color:var(--text-muted);border-left:1px solid var(--line-strong);padding-left:8px;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1;}
.nav-links a{position:relative;font-size:14px;font-weight:500;padding:9px 12px;border-radius:8px;color:var(--text-muted);white-space:nowrap;transition:color .15s ease,background .15s ease;}
.nav-links a:hover{color:var(--primary);background:var(--primary-100);}
.nav-links a.active{color:var(--primary);font-weight:700;}
.nav-links a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--accent-lime);}
.nav-right{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.command-search{display:flex;align-items:center;gap:8px;width:240px;height:40px;padding:0 12px;background:var(--surface-alt);border:1px solid var(--line);border-radius:var(--radius-btn);color:var(--text-muted);font-size:13.5px;transition:border-color .15s ease,box-shadow .15s ease,background .15s ease;}
.command-search:focus-within{border-color:var(--primary);background:var(--surface);box-shadow:0 0 0 2px var(--accent-lime);}
.command-search i{font-size:13px;color:var(--text-muted);}
.command-search input{border:0;background:transparent;outline:none;width:100%;font-size:13.5px;}
.command-search input::placeholder{color:var(--text-muted);}
.kbd{font-family:var(--mono);font-size:11px;padding:2px 6px;border-radius:6px;background:var(--surface);border:1px solid var(--line-strong);color:var(--text-muted);}
.nav-divider{width:1px;height:22px;background:var(--line-strong);}
.nav-quick{font-size:13.5px;font-weight:600;color:var(--text-muted);transition:color .15s ease;}
.nav-quick:hover{color:var(--primary);}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border-radius:var(--radius-btn);padding:12px 22px;font-size:14.5px;line-height:1;border:1px solid transparent;transition:transform .15s ease,box-shadow .15s ease,background .15s ease,color .15s ease,border-color .15s ease;}
.btn-primary{background:var(--accent-coral);color:#fff;box-shadow:0 8px 20px -12px rgba(255,92,57,.9);}
.btn-primary:hover{background:#F04E2B;transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary);}
.btn-outline:hover{background:var(--primary);color:#fff;}
.btn-lime{background:var(--accent-lime);color:var(--primary);}
.btn-lime:hover{background:#CBEF3B;transform:translateY(-1px);}
.btn-ghost{color:#fff;border-color:rgba(255,255,255,.35);background:transparent;}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.6);}
.btn-sm{padding:9px 16px;font-size:13.5px;}
.btn-block{width:100%;}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:var(--surface);place-items:center;font-size:17px;color:var(--primary);}
.drawer-mask{position:fixed;inset:0;background:rgba(30,22,51,.45);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s;z-index:90;}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;background:var(--surface);z-index:95;transform:translateX(100%);transition:transform .28s cubic-bezier(.16,1,.3,1);display:flex;flex-direction:column;padding:18px;overflow-y:auto;}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;font-size:16px;}
.drawer .command-search{width:100%;margin-bottom:18px;}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:20px;}
.drawer-nav a{padding:13px 12px;border-radius:10px;font-size:15px;font-weight:600;color:var(--text-muted);}
.drawer-nav a.active,.drawer-nav a:hover{background:var(--primary-100);color:var(--primary);}
.drawer .btn{margin-top:auto;}

/* ============ hero ============ */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#FBFAF7 0%,var(--base) 100%);}
.hero::before{content:"";position:absolute;top:-180px;right:-120px;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,rgba(216,255,74,.35) 0%,rgba(216,255,74,0) 68%);pointer-events:none;}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(to right,rgba(30,22,51,.05) 1px,transparent 1px),linear-gradient(to bottom,rgba(30,22,51,.05) 1px,transparent 1px);background-size:40px 40px;opacity:.7;pointer-events:none;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);}
.hero .container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;padding:84px 0 96px;}
.badge-keyword{display:inline-flex;align-items:center;gap:8px;background:var(--accent-lime);color:var(--primary);font-size:13px;font-weight:800;padding:7px 14px;border-radius:999px;letter-spacing:.01em;}
.badge-keyword i{font-size:12px;}
.hero h1{font-size:clamp(34px,5.6vw,64px);line-height:1.08;letter-spacing:-.03em;margin:20px 0 16px;}
.hero h1 em{font-style:normal;position:relative;white-space:nowrap;}
.hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:10px;background:var(--accent-lime);border-radius:3px;z-index:-1;opacity:.85;}
.hero-sub{font-size:18px;color:var(--text-muted);max-width:560px;line-height:1.72;}
.hero-actions{display:flex;gap:14px;margin:32px 0 30px;flex-wrap:wrap;}
.hero-trust{display:flex;align-items:center;gap:22px;flex-wrap:wrap;font-size:13px;color:var(--text-muted);}
.hero-trust .t-item{display:flex;align-items:center;gap:8px;}
.hero-trust strong{font-family:var(--mono);font-size:17px;font-weight:800;color:var(--primary);letter-spacing:-.02em;}
.hero-trust .t-sep{width:1px;height:26px;background:var(--line-strong);}
.hero-visual{position:relative;}
.hero-visual .main-shot{border-radius:20px;overflow:hidden;box-shadow:var(--shadow-2);aspect-ratio:4/3;position:relative;}
.hero-visual .main-shot img{width:100%;height:100%;object-fit:cover;}
.hero-visual .main-shot::after{content:"";position:absolute;inset:0;background:rgba(30,22,51,.12);}
.status-card{position:absolute;top:18px;right:-14px;background:var(--surface);border-radius:14px;padding:13px 16px;box-shadow:var(--shadow-2);display:flex;align-items:center;gap:10px;font-size:13px;font-weight:700;}
.dot-live{width:9px;height:9px;border-radius:50%;background:var(--success);box-shadow:0 0 0 0 rgba(31,157,107,.5);animation:pulse 6s ease-in-out infinite;}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(31,157,107,.45);}50%{box-shadow:0 0 0 8px rgba(31,157,107,0);}}
.status-card small{display:block;font-weight:500;color:var(--text-muted);font-size:11.5px;line-height:1.3;}
.mini-card{position:absolute;left:-22px;bottom:-26px;width:216px;background:var(--surface);border-radius:14px;box-shadow:var(--shadow-2);padding:10px;display:flex;gap:10px;align-items:center;}
.mini-card img{width:56px;height:56px;border-radius:10px;object-fit:cover;}
.mini-card p{font-size:12.5px;font-weight:700;line-height:1.4;}
.mini-card span{font-size:11.5px;color:var(--text-muted);}

/* ============ category strip ============ */
.cat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.cat-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .2s ease,border-color .2s ease;}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--line-strong);}
.cat-icon{width:42px;height:42px;border-radius:12px;background:var(--primary-100);color:var(--primary);display:grid;place-items:center;font-size:17px;margin-bottom:16px;}
.cat-card h3{font-size:18px;line-height:1.45;margin-bottom:8px;}
.cat-card p{font-size:13.5px;color:var(--text-muted);line-height:1.7;}
.cat-card .cat-more{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13px;font-weight:700;color:var(--primary);}
.cat-card:hover .cat-more i{transform:translateX(3px);}
.cat-more i{font-size:11px;transition:transform .2s ease;}

/* ============ steps ============ */
.steps-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;}
.steps-aside{position:sticky;top:104px;align-self:start;}
.steps-aside h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3;margin:14px 0 12px;}
.steps-aside p{color:var(--text-muted);font-size:15px;}
.step-list{display:flex;flex-direction:column;}
.step{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:32px 0;border-top:1px dashed var(--line-strong);}
.step:first-child{border-top:0;padding-top:0;}
.step-num{font-family:var(--mono);font-size:clamp(48px,6vw,80px);font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.6px var(--accent-coral);letter-spacing:-.04em;}
.step h3{font-size:21px;line-height:1.45;margin-bottom:10px;}
.step p{color:var(--text-muted);font-size:15.5px;max-width:640px;}
.step .link-arrow{margin-top:12px;font-size:13.5px;}

/* ============ value grid ============ */
.value-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px;margin-top:8px;}
.value-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;transition:transform .2s ease,box-shadow .2s ease;}
.value-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-1);}
.value-card.wide{grid-column:span 6;}
.value-card.narrow{grid-column:span 3;}
.value-card h3{font-size:19px;margin:14px 0 10px;line-height:1.45;}
.value-card p{font-size:14.5px;color:var(--text-muted);}
.value-tag{display:inline-block;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;background:var(--surface-alt);color:var(--text-muted);}
.value-tag.tag-lime{background:var(--accent-lime);color:var(--primary);}
.value-tag.tag-soft{background:var(--primary-100);color:var(--primary);}
.value-icon{width:40px;height:40px;border-radius:11px;background:var(--primary);color:var(--accent-lime);display:grid;place-items:center;font-size:16px;}

/* ============ metrics ============ */
.metrics{background:var(--primary);border-radius:var(--radius-panel);padding:52px 44px;color:var(--text-inverse);display:grid;grid-template-columns:repeat(4,1fr);gap:32px;position:relative;overflow:hidden;}
.metrics::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:18px 18px;pointer-events:none;}
.metric{position:relative;z-index:1;}
.metric strong{display:block;font-family:var(--mono);font-size:clamp(30px,3.4vw,44px);font-weight:800;letter-spacing:-.03em;line-height:1.1;}
.metric span{display:block;margin-top:10px;font-size:13.5px;color:var(--text-inverse-muted);}
.metric i{display:block;width:36px;height:3px;background:var(--accent-lime);border-radius:3px;margin-top:14px;}

/* ============ proof ============ */
.proof-grid{display:grid;grid-template-columns:8fr 4fr;gap:22px;}
.proof-main{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease;}
.proof-main:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.proof-main img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.proof-body{padding:26px 28px 28px;}
.proof-body blockquote{margin:0;font-size:17px;line-height:1.8;color:var(--text);}
.proof-author{display:flex;align-items:center;gap:12px;margin-top:20px;padding-top:18px;border-top:1px solid var(--line);}
.proof-author .avatar{width:38px;height:38px;border-radius:50%;background:var(--primary-100);color:var(--primary);display:grid;place-items:center;font-weight:800;font-size:14px;}
.proof-author p{font-size:13.5px;font-weight:700;}
.proof-author span{font-size:12.5px;color:var(--text-muted);}
.proof-side{display:grid;gap:22px;}
.proof-small{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;transition:transform .2s ease,box-shadow .2s ease;}
.proof-small:hover{transform:translateY(-4px);box-shadow:var(--shadow-1);}
.proof-small h3{font-size:16.5px;line-height:1.5;margin-bottom:10px;}
.proof-small p{font-size:14px;color:var(--text-muted);}
.proof-small .hl{display:block;font-family:var(--mono);font-size:26px;font-weight:800;color:var(--primary);margin-top:14px;letter-spacing:-.02em;}
.proof-small .hl-note{font-size:12.5px;color:var(--text-muted);}
.proof-small .bar{width:44px;height:3px;background:var(--accent-lime);border-radius:3px;margin-top:12px;}

/* ============ news / cms ============ */
.filter-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px;}
.chip{font-size:13.5px;font-weight:600;padding:8px 16px;border-radius:999px;background:var(--surface-alt);color:var(--text-muted);border:1px solid transparent;transition:all .15s ease;}
.chip:hover{color:var(--primary);border-color:var(--line-strong);}
.chip.active{background:var(--primary);color:var(--accent-lime);}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.news-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .2s ease;}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-600) 52%,#4B3F6B 100%);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-thumb .ph{position:absolute;inset:0;display:grid;place-items:center;color:var(--accent-lime);font-size:44px;font-weight:800;font-family:var(--mono);opacity:.9;}
.news-badge{position:absolute;top:12px;left:12px;background:rgba(30,22,51,.85);color:var(--accent-lime);font-size:11.5px;font-weight:700;padding:5px 11px;border-radius:999px;backdrop-filter:blur(4px);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.news-body h3{font-size:17px;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card:hover .news-body h3{color:var(--primary-600);}
.news-body p{font-size:14px;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:16px;font-size:12.5px;color:var(--text-muted);}
.news-meta .meta-time{display:inline-flex;align-items:center;gap:6px;}
.news-meta .meta-cat{background:var(--primary-100);color:var(--primary);padding:3px 10px;border-radius:999px;font-weight:700;}
.news-meta .meta-go{margin-left:auto;color:var(--primary);font-size:13px;transition:transform .2s ease;}
.news-card:hover .meta-go{transform:translateX(3px);}
.empty-state{grid-column:1/-1;min-height:260px;border:1px dashed var(--line-strong);border-radius:var(--radius-card);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;background:var(--surface);color:var(--text-muted);}
.empty-state i{font-size:30px;color:var(--line-strong);}
.empty-state p{font-size:14.5px;}

/* ============ faq ============ */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;}
.faq-aside{position:sticky;top:104px;align-self:start;}
.faq-aside h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3;margin:14px 0 12px;}
.faq-aside p{color:var(--text-muted);font-size:15px;margin-bottom:20px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;position:relative;transition:border-color .2s ease,background .2s ease;}
.faq-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent-lime);transform:scaleY(0);transform-origin:top;transition:transform .24s ease;}
.faq-item.open::before{transform:scaleY(1);}
.faq-item.open{border-color:var(--line-strong);background:#FCFBF8;}
.faq-q{width:100%;display:flex;align-items:center;gap:16px;text-align:left;padding:20px 22px;font-size:16px;font-weight:700;line-height:1.55;}
.faq-q i{margin-left:auto;font-size:13px;color:var(--text-muted);transition:transform .24s ease;flex-shrink:0;}
.faq-item.open .faq-q i{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease,opacity .24s ease;opacity:0;}
.faq-item.open .faq-a{opacity:1;}
.faq-a-inner{padding:0 22px 22px 22px;font-size:15px;color:var(--text-muted);line-height:1.8;}

/* ============ cta band ============ */
.cta-band{background:var(--primary);border-radius:var(--radius-panel);padding:56px 52px;color:var(--text-inverse);display:flex;align-items:center;justify-content:space-between;gap:40px;position:relative;overflow:hidden;}
.cta-band::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);background-size:16px 16px;pointer-events:none;}
.cta-band h2{font-size:clamp(24px,2.8vw,36px);line-height:1.25;margin-bottom:12px;position:relative;z-index:1;}
.cta-band p{color:var(--text-inverse-muted);font-size:15px;max-width:520px;position:relative;z-index:1;}
.cta-actions{display:flex;gap:14px;flex-shrink:0;position:relative;z-index:1;}

/* ============ footer ============ */
.site-footer{background:var(--primary);color:var(--text-inverse);margin-top:96px;border-top:2px solid var(--accent-lime);}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding:72px 0 52px;}
.footer-brand .brand-mark{background:var(--accent-lime);color:var(--primary);}
.footer-brand .brand-name{color:#fff;}
.footer-brand p{color:var(--text-inverse-muted);font-size:14px;margin-top:16px;max-width:320px;}
.footer-badge{display:inline-flex;align-items:center;gap:8px;margin-top:18px;font-size:12.5px;font-weight:700;color:var(--accent-lime);background:rgba(216,255,74,.12);border:1px solid rgba(216,255,74,.35);padding:6px 12px;border-radius:999px;}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.footer-col a{display:block;font-size:14px;color:var(--text-inverse-muted);padding:6px 0;transition:color .15s ease;}
.footer-col a:hover{color:var(--accent-lime);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-inverse-muted);}
.footer-bottom a{color:var(--text-inverse-muted);}
.footer-bottom a:hover{color:var(--accent-lime);}

/* ============ reveal ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .42s cubic-bezier(.16,1,.3,1),transform .42s cubic-bezier(.16,1,.3,1);}
.reveal.in{opacity:1;transform:none;}

/* ============ responsive ============ */
@media (max-width:1279px){
  .container{max-width:960px;}
  .nav-links a{font-size:13.5px;padding:9px 10px;}
  .command-search{width:190px;}
}
@media (max-width:1023px){
  .container{max-width:720px;}
  .section{padding:72px 0;}
  .nav-links,.command-search,.nav-divider,.nav-quick{display:none;}
  .nav-toggle{display:grid;}
  .nav{justify-content:space-between;height:64px;}
  .hero-grid{grid-template-columns:1fr;gap:48px;padding:56px 0 72px;}
  .hero-visual{max-width:560px;}
  .mini-card{left:0;}
  .steps-wrap,.faq-wrap{grid-template-columns:1fr;gap:32px;}
  .steps-aside,.faq-aside{position:static;}
  .cat-strip{grid-template-columns:repeat(2,1fr);}
  .value-card.wide,.value-card.narrow{grid-column:span 6;}
  .metrics{grid-template-columns:repeat(2,1fr);padding:40px 32px;}
  .proof-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 40px;}
}
@media (max-width:767px){
  .container{max-width:100%;padding:0 20px;}
  .section{padding:56px 0;}
  .hero h1{font-size:clamp(30px,8vw,40px);}
  .hero-sub{font-size:16.5px;}
  .hero-actions .btn{flex:1;justify-content:center;}
  .hero-trust{gap:14px;}
  .hero-trust .t-sep{display:none;}
  .step{grid-template-columns:1fr;gap:12px;}
  .step-num{font-size:44px;}
  .cat-strip{grid-template-columns:1fr;}
  .value-grid{grid-template-columns:1fr;}
  .value-card.wide,.value-card.narrow{grid-column:span 1;}
  .metrics{grid-template-columns:1fr;gap:28px;padding:32px 24px;}
  .news-grid{grid-template-columns:1fr;}
  .proof-body{padding:22px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .status-card{right:8px;top:10px;}
  .mini-card{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --primary:#1E1633;
  --primary-600:#2E2350;
  --primary-100:#EFEBFA;
  --lime:#D8FF4A;
  --coral:#FF5C39;
  --base:#F7F6F2;
  --surface:#FFFFFF;
  --surface-alt:#F1EFE9;
  --line:#E5E2DA;
  --line-strong:#CFCBC0;
  --text:#17151C;
  --muted:#6B6875;
  --inv:#FFFFFF;
  --inv-muted:#A9A5B8;
  --success:#1F9D6B;
  --warning:#E0A020;
  --danger:#D8452F;
  --info:#4A5BD6;
  --r-card:16px;
  --r-panel:28px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(30,22,51,.05), 0 12px 32px -14px rgba(30,22,51,.16);
  --sh-2:0 2px 4px rgba(30,22,51,.06), 0 22px 48px -18px rgba(30,22,51,.24);
  --ease:cubic-bezier(.16,1,.3,1);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.78;
  color:var(--text);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input,button,textarea{font-size:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--primary)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,246,242,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 8px 24px -18px rgba(30,22,51,.35);background:rgba(247,246,242,.97)}
.nav{display:flex;align-items:center;gap:24px;height:72px;transition:height .2s var(--ease)}
.site-header.is-scrolled .nav{height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex-shrink:0;
  background:var(--primary);color:var(--lime);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:15px;font-weight:800;color:var(--primary)}
.brand-sub{font-size:11.5px;color:var(--muted);letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-links a{
  position:relative;padding:8px 12px;font-size:14px;font-weight:500;color:var(--muted);
  border-radius:8px;transition:color .15s var(--ease),background .15s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--lime);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-links a:hover{color:var(--primary);background:var(--surface-alt)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);font-weight:700}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:240px;height:38px;padding:0 10px 0 12px;
  background:var(--surface-alt);border:1px solid var(--line);border-radius:var(--r-btn);
  color:var(--muted);transition:border-color .15s var(--ease),box-shadow .15s var(--ease),background .15s var(--ease);
}
.command-search:focus-within{background:var(--surface);border-color:var(--primary);box-shadow:0 0 0 2px var(--lime)}
.command-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;color:var(--text);font-size:13.5px}
.command-search input::placeholder{color:#9B97A6}
.command-search .kbd{
  font-family:var(--mono);font-size:11px;color:var(--muted);
  border:1px solid var(--line-strong);border-radius:6px;padding:1px 5px;background:var(--surface);
}
.nav-divider{width:1px;height:22px;background:var(--line)}
.nav-quick{font-size:14px;font-weight:600;color:var(--primary);border-bottom:1.5px solid var(--lime);padding-bottom:1px}
.nav-quick:hover{border-bottom-width:3px}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--surface);color:var(--primary);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:700;line-height:1.2;
  transition:transform .15s var(--ease),box-shadow .15s var(--ease),background .15s var(--ease),color .15s var(--ease),border-color .15s var(--ease);
}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-primary{background:var(--coral);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:#F04A26;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-secondary{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-secondary:hover{background:var(--primary);color:#fff}
.btn-lime{background:var(--lime);color:var(--primary);box-shadow:var(--sh-1)}
.btn-lime:hover{background:#CBF23A;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ============ 抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(30,22,51,.45);z-index:90;
  opacity:0;pointer-events:none;transition:opacity .2s var(--ease);
}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:95;
  background:var(--surface);border-left:1px solid var(--line);
  padding:22px 20px 28px;display:flex;flex-direction:column;gap:18px;
  transform:translateX(102%);transition:transform .26s var(--ease);overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-head .brand-name{font-size:14px}
.drawer-close{width:38px;height:38px;border-radius:var(--r-btn);border:1px solid var(--line);background:var(--surface-alt);color:var(--primary)}
.drawer-links{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);padding-top:14px}
.drawer-links a{padding:12px 10px;border-radius:10px;font-size:15px;font-weight:600;color:var(--primary)}
.drawer-links a:hover,.drawer-links a.active{background:var(--primary-100)}
.drawer .btn{width:100%}

/* ============ 文章头 ============ */
.art-hero{
  position:relative;overflow:hidden;padding:52px 0 42px;
  background:linear-gradient(180deg,#FBFAF6 0%,var(--base) 100%);
  border-bottom:1px solid var(--line);
}
.art-hero::before{
  content:"";position:absolute;right:-180px;top:-280px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(216,255,74,.38),rgba(216,255,74,0) 68%);
  pointer-events:none;
}
.art-hero::after{
  content:"";position:absolute;left:-120px;bottom:-240px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,92,57,.12),rgba(255,92,57,0) 70%);
  pointer-events:none;
}
.art-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px;min-width:0}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary);border-bottom:1.5px solid var(--lime)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--primary);font-weight:600;max-width:360px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.art-head{max-width:860px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:700;background:var(--primary-100);color:var(--primary);
}
.badge-cat{background:var(--primary);color:var(--lime)}
.page-title{
  margin:18px 0 16px;
  font-size:clamp(28px,3.6vw,42px);line-height:1.22;font-weight:800;
}
.art-lead{font-size:17px;color:var(--muted);max-width:720px;line-height:1.8}
.art-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:22px;font-size:13px;color:var(--muted);
}
.art-meta i{color:var(--coral);margin-right:4px}
.art-meta .dot{width:1px;height:13px;background:var(--line-strong)}

/* ============ 正文布局 ============ */
.article-section{padding:64px 0 96px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:48px;align-items:start}
.article-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:40px;min-width:0;
}
.article-cover{
  width:100%;aspect-ratio:16/6;object-fit:cover;border-radius:12px;
  border:1px solid var(--line);margin-bottom:32px;
}
.article-body{font-size:17px;line-height:1.85;color:#221F29;max-width:760px}
.article-body p{margin:0 0 1.5em}
.article-body h2{
  position:relative;font-size:26px;line-height:1.35;margin:48px 0 18px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;background:var(--lime);
}
.article-body h3{font-size:21px;margin:32px 0 12px}
.article-body strong{color:var(--primary)}
.article-body a{color:var(--primary);font-weight:600;border-bottom:1.5px solid var(--lime)}
.article-body a:hover{border-bottom-width:3px}
.article-body ul{margin:0 0 1.5em;padding-left:2px}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--lime);border:1px solid #B9DE2C;
}
.article-body ol{margin:0 0 1.5em;padding-left:24px}
.article-body ol li{margin-bottom:10px}
.article-body blockquote{
  margin:24px 0;padding:18px 20px;background:var(--surface-alt);
  border-left:4px solid var(--primary);border-radius:0 12px 12px 0;color:#3A3548;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;box-shadow:var(--sh-1);margin:24px 0}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;display:block;overflow-x:auto}
.article-body th{background:var(--primary);color:#fff;text-align:left;padding:12px 14px;font-weight:700;white-space:nowrap}
.article-body td{padding:11px 14px;border-bottom:1px solid var(--line)}
.article-body tr:nth-child(even) td{background:#FBFAF7}
.article-body pre{
  background:var(--primary);color:#EFEBFA;border-radius:12px;padding:18px 20px;
  overflow-x:auto;font-family:var(--mono);font-size:14px;line-height:1.7;margin:24px 0;
}
.article-body code{font-family:var(--mono);font-size:.92em;background:var(--surface-alt);padding:2px 6px;border-radius:6px}
.article-body pre code{background:transparent;padding:0;color:inherit}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--r-pill);
  background:var(--surface-alt);border:1px solid var(--line);font-size:13px;color:var(--muted);
  transition:background .15s var(--ease),color .15s var(--ease),border-color .15s var(--ease);
}
.tag:hover{background:var(--primary);color:var(--lime);border-color:var(--primary)}

/* ============ 侧栏 ============ */
.sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-1);
}
.side-card h3{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3 i{color:var(--coral);font-size:13px}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:8px 10px;border-radius:8px;font-size:13.5px;color:var(--muted);
  border-left:3px solid transparent;transition:all .15s var(--ease);
}
.toc-list a:hover{background:var(--surface-alt);color:var(--primary)}
.toc-list a.current{border-left-color:var(--lime);background:var(--primary-100);color:var(--primary);font-weight:700}
.side-cta{
  background:var(--primary);color:#fff;border-radius:var(--r-card);padding:22px;
  border:1px solid var(--primary-600);
}
.side-cta h3{color:#fff;font-size:16px;margin-bottom:8px}
.side-cta p{font-size:13.5px;color:var(--inv-muted);line-height:1.7;margin-bottom:16px}
.side-cta .btn{width:100%;padding:11px 16px;font-size:14px}
.side-links{display:flex;flex-direction:column;gap:10px}
.side-links a{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--muted)}
.side-links a:hover{color:var(--primary)}
.side-links a i{color:var(--lime);font-size:11px}

/* ============ 空态 ============ */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  min-height:280px;text-align:center;border:1px dashed var(--line-strong);border-radius:var(--r-card);
  background:var(--surface-alt);padding:40px 24px;
}
.empty-state i{font-size:34px;color:var(--line-strong)}
.empty-state h2{font-size:20px}
.empty-state p{font-size:14px;color:var(--muted)}

/* ============ 继续了解 / 相关推荐 ============ */
.section{padding:0 0 88px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3}
.section-head p{font-size:14.5px;color:var(--muted);margin-top:8px;max-width:620px}
.section-head .more{font-size:14px;font-weight:700;color:var(--primary);border-bottom:1.5px solid var(--lime);white-space:nowrap}
.section-head .more:hover{border-bottom-width:3px}

.next-prev{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.np-card{
  display:flex;flex-direction:column;gap:8px;padding:24px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.np-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--line-strong)}
.np-label{font-size:12.5px;font-weight:700;color:var(--coral);letter-spacing:.04em}
.np-card h3{font-size:18px;line-height:1.45}
.np-card p{font-size:13.5px;color:var(--muted);line-height:1.7}

.related-grid{display: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-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.post-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,var(--primary),var(--lime))}
.post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.post-card:hover .post-cover img{transform:scale(1.03)}
.post-badge{
  position:absolute;left:12px;top:12px;padding:4px 10px;border-radius:var(--r-pill);
  background:rgba(30,22,51,.86);color:var(--lime);font-size:11.5px;font-weight:700;
}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-title{font-size:18px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card:hover .post-title{color:var(--coral)}
.post-excerpt{font-size:13.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--muted);
}
.post-foot i{color:var(--coral)}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:320px minmax(0,1fr);gap:48px;align-items:start}
.faq-intro{position:sticky;top:96px}
.faq-intro h2{font-size:clamp(24px,2.4vw,32px);margin-bottom:14px;line-height:1.3}
.faq-intro p{font-size:15px;color:var(--muted);margin-bottom:22px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.faq-item.open{border-color:var(--line-strong);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:transparent;border:0;text-align:left;
  font-size:16px;font-weight:700;color:var(--primary);
}
.faq-item.open .faq-q{background:var(--surface-alt)}
.faq-q i{color:var(--coral);transition:transform .24s var(--ease);flex-shrink:0}
.faq-item.open .faq-q i{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a-inner{
  padding:4px 20px 20px;font-size:14.5px;color:var(--muted);line-height:1.8;
  border-left:3px solid var(--lime);margin-left:0;
}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--primary);border-radius:var(--r-panel);
  padding:52px 48px;display:flex;align-items:center;justify-content:space-between;gap:36px;
  box-shadow:var(--sh-2);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);
  background-size:18px 18px;opacity:.7;pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-140px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(216,255,74,.28),rgba(216,255,74,0) 70%);pointer-events:none;
}
.cta-copy{position:relative;z-index:1;max-width:620px}
.cta-copy h2{color:#fff;font-size:clamp(24px,2.6vw,34px);line-height:1.3;margin-bottom:12px}
.cta-copy p{color:var(--inv-muted);font-size:15px}
.cta-actions{position:relative;z-index:1;display:flex;gap:14px;flex-shrink:0}

/* ============ 页脚 ============ */
.site-footer{background:var(--primary);color:var(--inv);border-top:2px solid var(--lime);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .brand{padding:0}
.footer-brand .brand-mark{background:var(--lime);color:var(--primary)}
.footer-brand .brand-name{color:#fff;font-size:16px}
.footer-brand p{margin:18px 0 18px;font-size:14px;color:var(--inv-muted);line-height:1.8;max-width:340px}
.footer-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:var(--r-pill);
  background:rgba(216,255,74,.14);color:var(--lime);font-size:13px;font-weight:600;
  border:1px solid rgba(216,255,74,.28);
}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:16px;letter-spacing:.02em}
.footer-col a{display:block;font-size:14px;color:var(--inv-muted);padding:6px 0;transition:color .15s var(--ease)}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:var(--inv-muted);
}
.footer-bottom a{color:var(--lime);border-bottom:1px solid rgba(216,255,74,.4)}
.footer-bottom a:hover{border-bottom-width:2px}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(18px)}
.reveal.in{opacity:1;transform:none;transition:opacity .42s var(--ease),transform .42s var(--ease)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:960px}
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:36px}
  .related-grid{gap:20px}
}
@media (max-width:1023px){
  .container{max-width:720px}
  .nav-links,.command-search,.nav-divider,.nav-quick{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:28px}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .sidebar>*{flex:1 1 260px}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .faq-intro{position:static}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 32px}
  .cta-actions{width:100%;flex-wrap:wrap}
}
@media (max-width:767px){
  .container{max-width:100%;padding:0 20px}
  body{font-size:16px}
  .art-hero{padding:36px 0 30px}
  .breadcrumb .current{max-width:180px}
  .article-section{padding:40px 0 64px}
  .article-card{padding:24px 20px}
  .article-body{font-size:16px}
  .article-body h2{font-size:22px;margin-top:36px}
  .article-cover{aspect-ratio:16/9;margin-bottom:24px}
  .section{padding:0 0 60px}
  .next-prev{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .cta-band{padding:32px 22px;border-radius:20px}
  .cta-actions .btn{width:100%}
  .sidebar{flex-direction:column}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  .page-title{font-size:26px}
  .faq-q{font-size:15px;padding:16px}
  .post-body{padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --primary:#1E1633;
  --primary-600:#2E2350;
  --primary-100:#EFEBFA;
  --accent-lime:#D8FF4A;
  --accent-coral:#FF5C39;
  --base:#F7F6F2;
  --surface:#FFFFFF;
  --surface-alt:#F1EFE9;
  --line:#E5E2DA;
  --line-strong:#CFCBC0;
  --text:#17151C;
  --text-muted:#6B6875;
  --text-inverse:#FFFFFF;
  --text-inverse-muted:#A9A5B8;
  --success:#1F9D6B;
  --warning:#E0A020;
  --danger:#D8452F;
  --info:#4A5BD6;
  --radius-card:16px;
  --radius-panel:28px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-card:0 1px 2px rgba(30,22,51,.05), 0 12px 32px -14px rgba(30,22,51,.16);
  --shadow-hover:0 2px 4px rgba(30,22,51,.06), 0 22px 48px -18px rgba(30,22,51,.24);
  --space-6:24px;
  --font-sans:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--base);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.78;
  letter-spacing:.005em;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;color:var(--text);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent-lime);outline-offset:2px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-title{font-size:clamp(24px,2.4vw,32px);line-height:1.3;}
.section-desc{color:var(--text-muted);font-size:15px;max-width:560px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.12em;
  color:var(--primary-600);text-transform:uppercase;
  font-family:var(--font-mono);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent-coral);display:block;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease,background .2s ease;
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 6px 24px -18px rgba(30,22,51,.45);
  background:rgba(247,246,242,.97);
}
.nav{
  display:flex;align-items:center;gap:20px;
  height:72px;
  transition:height .2s ease;
}
.site-header.is-scrolled .nav{height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:9px;
  background:var(--primary);color:var(--accent-lime);
  display:grid;place-items:center;
  font-family:var(--font-mono);font-weight:700;font-size:14px;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-weight:800;font-size:15.5px;letter-spacing:-.01em;}
.brand-sub{font-size:11.5px;color:var(--text-muted);letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:12px;}
.nav-links a{
  position:relative;
  padding:8px 12px;
  font-size:14px;font-weight:500;color:var(--text-muted);
  border-radius:8px;
  transition:color .16s ease,background .16s ease;
  white-space:nowrap;
}
.nav-links a:hover{color:var(--primary);background:var(--primary-100);}
.nav-links a.active{color:var(--primary);font-weight:700;}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--accent-lime);border-radius:2px;
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:240px;height:40px;padding:0 10px 0 12px;
  background:var(--surface-alt);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--text-muted);font-size:13.5px;
  transition:border-color .16s ease,box-shadow .16s ease,background .16s ease;
}
.command-search i{font-size:13px;color:var(--text-muted);}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:13.5px;
}
.command-search input::placeholder{color:#9B98A6;}
.command-search:focus-within{
  background:var(--surface);
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(216,255,74,.6);
}
.kbd{
  font-family:var(--font-mono);font-size:11px;
  padding:2px 6px;border-radius:6px;
  background:var(--surface);border:1px solid var(--line);
  color:var(--text-muted);
}
.nav-divider{width:1px;height:22px;background:var(--line-strong);}
.nav-quick{font-size:13.5px;font-weight:600;color:var(--primary-600);border-bottom:1.5px solid var(--accent-lime);padding-bottom:2px;transition:border-width .16s ease;}
.nav-quick:hover{border-bottom-width:3px;}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);
  color:var(--primary);font-size:16px;
}

/* ---------- buttons / badges ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);
  font-size:14.5px;font-weight:700;
  border:1px solid transparent;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease,border-color .16s ease;
}
.btn-sm{padding:9px 16px;font-size:13.5px;}
.btn-primary{background:var(--accent-coral);color:#fff;box-shadow:var(--shadow-card);}
.btn-primary:hover{background:#ef4a26;transform:translateY(-1px);box-shadow:var(--shadow-hover);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-card);}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--primary);color:#fff;}
.btn-lime{background:var(--accent-lime);color:var(--primary);}
.btn-lime:hover{background:#cbf23c;transform:translateY(-1px);box-shadow:0 18px 40px -20px rgba(216,255,74,.9);}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.5);color:#fff;}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.08);}
.btn-link{color:var(--primary);font-weight:700;font-size:14px;border-bottom:1.5px solid var(--accent-lime);padding-bottom:2px;}
.btn-link:hover{border-bottom-width:3px;}
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 13px;border-radius:var(--radius-pill);
  font-size:12.5px;font-weight:700;
  background:var(--surface-alt);color:var(--text-muted);
}
.badge-lime{background:var(--accent-lime);color:var(--primary);}
.badge-soft{background:var(--primary-100);color:var(--primary);}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 12px;border-radius:var(--radius-pill);
  font-size:12.5px;color:var(--text-muted);
  background:var(--surface-alt);border:1px solid var(--line);
}

/* ---------- breadcrumb ---------- */
.crumb{padding:22px 0 0;font-size:13.5px;color:var(--text-muted);}
.crumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"›";color:var(--line-strong);}
.crumb a:hover{color:var(--primary);border-bottom:1px solid var(--accent-lime);}
.crumb .current{color:var(--text);font-weight:600;}

/* ---------- hero ---------- */
.cat-hero{position:relative;overflow:hidden;padding:34px 0 68px;}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(520px 320px at 88% 8%, rgba(216,255,74,.22), transparent 70%),
    linear-gradient(180deg,rgba(255,255,255,.6),rgba(247,246,242,0));
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;
}
.hero-copy h1{
  font-size:clamp(30px,4vw,46px);
  line-height:1.18;
  margin:18px 0 16px;
}
.hero-lead{color:var(--text-muted);font-size:16.5px;max-width:620px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:24px;margin-top:34px;
  padding-top:22px;border-top:1px solid var(--line);
}
.fact{min-width:120px;}
.fact-num{font-family:var(--font-mono);font-size:23px;font-weight:700;color:var(--primary);}
.fact-num span{color:var(--accent-coral);}
.fact-label{font-size:13px;color:var(--text-muted);}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:20px;box-shadow:var(--shadow-card);
}
.hero-media::after{
  content:"";position:absolute;inset:0;border-radius:20px;
  background:linear-gradient(180deg,rgba(30,22,51,.06),rgba(30,22,51,.22));
}
.hero-chip{
  position:absolute;left:-14px;bottom:-18px;
  display:flex;align-items:center;gap:10px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:12px 16px;box-shadow:var(--shadow-card);
  font-size:13px;font-weight:600;
}
.pulse{
  width:9px;height:9px;border-radius:50%;background:var(--success);
  box-shadow:0 0 0 0 rgba(31,157,107,.5);
  animation:pulse 6s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(31,157,107,.45);}
  50%{box-shadow:0 0 0 8px rgba(31,157,107,0);}
}

/* ---------- steps timeline ---------- */
.steps-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start;}
.steps-aside{position:sticky;top:104px;}
.steps-aside p{color:var(--text-muted);margin-top:16px;font-size:15px;}
.timeline{position:relative;padding-left:8px;}
.timeline::before{
  content:"";position:absolute;left:22px;top:14px;bottom:26px;
  border-left:1px dashed var(--line-strong);
}
.step{position:relative;padding:0 0 34px 62px;}
.step:last-child{padding-bottom:0;}
.step-dot{
  position:absolute;left:12px;top:6px;
  width:21px;height:21px;border-radius:50%;
  background:var(--accent-lime);
  border:4px solid var(--surface);
  box-shadow:0 0 0 1px var(--line);
}
.step-index{
  font-family:var(--font-mono);font-size:12.5px;font-weight:700;
  color:var(--accent-coral);letter-spacing:.1em;
}
.step h3{font-size:19px;margin:6px 0 8px;}
.step p{color:var(--text-muted);font-size:15.5px;max-width:640px;}
.step-note{
  margin-top:12px;display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;color:var(--primary-600);font-weight:600;
}
.step-note i{color:var(--accent-coral);}

/* ---------- tips ---------- */
.tips-block{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-panel);padding:48px;}
.tips-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px;}
.tip{
  background:var(--base);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:26px 24px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tip:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-strong);}
.tip-icon{
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  background:var(--primary-100);color:var(--primary);
  font-size:16px;margin-bottom:16px;
}
.tip h3{font-size:18px;margin-bottom:10px;}
.tip p{color:var(--text-muted);font-size:15px;}
.tip ul{margin-top:12px;display:grid;gap:8px;}
.tip li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text-muted);}
.tip li::before{
  content:"";position:absolute;left:0;top:10px;
  width:7px;height:7px;border-radius:2px;background:var(--accent-lime);
}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:start;}
.faq-aside{position:sticky;top:104px;}
.faq-aside p{color:var(--text-muted);margin:16px 0 22px;font-size:15px;}
.faq-list{display:grid;gap:14px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);
  border-radius:14px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.open{border-color:var(--line-strong);box-shadow:var(--shadow-card);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;
  font-size:16.5px;font-weight:700;color:var(--text);
  position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  background:var(--accent-lime);border-radius:0 3px 3px 0;
  transform:scaleY(0);transform-origin:center;transition:transform .24s ease;
}
.faq-item.open .faq-q::before{transform:scaleY(1);}
.faq-q i{font-size:13px;color:var(--text-muted);transition:transform .24s ease;}
.faq-item.open .faq-q i{transform:rotate(180deg);color:var(--primary);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease,opacity .24s ease;opacity:0;}
.faq-item.open .faq-a{opacity:1;}
.faq-a-inner{padding:0 22px 22px 22px;color:var(--text-muted);font-size:15.5px;}

/* ---------- cta band ---------- */
.cta-wrap{padding:0 0 96px;}
.cta-band{
  position:relative;overflow:hidden;
  background:var(--primary);border-radius:var(--radius-panel);
  padding:52px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  color:var(--text-inverse);
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:18px 18px;opacity:.5;pointer-events:none;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.2vw,30px);}
.cta-band p{color:var(--text-inverse-muted);margin-top:12px;font-size:15px;max-width:560px;}
.cta-actions{position:relative;display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--primary);color:var(--text-inverse-muted);
  border-top:2px solid var(--accent-lime);
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand .brand-name{color:#fff;}
.site-footer .brand-mark{background:rgba(255,255,255,.1);color:var(--accent-lime);}
.footer-brand p{font-size:14.5px;max-width:340px;}
.footer-badge{
  display:inline-flex;align-items:center;gap:8px;margin-top:20px;
  padding:7px 14px;border-radius:var(--radius-pill);
  background:rgba(216,255,74,.12);color:var(--accent-lime);
  font-size:12.5px;font-weight:700;
}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:18px;letter-spacing:.04em;}
.footer-col a{
  display:block;font-size:14px;padding:6px 0;
  transition:color .16s ease,transform .16s ease;
}
.footer-col a:hover{color:var(--accent-lime);transform:translateX(3px);}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-inverse-muted);
}
.footer-bottom a{color:var(--accent-lime);}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;top:0;right:0;z-index:90;
  width:84vw;max-width:360px;height:100%;
  background:var(--surface);
  transform:translateX(100%);
  transition:transform .26s cubic-bezier(.16,1,.3,1);
  padding:22px;overflow-y:auto;
  box-shadow:-18px 0 46px -24px rgba(30,22,51,.5);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);color:var(--primary);}
.drawer .command-search{width:100%;margin-bottom:22px;}
.drawer-nav{display:grid;gap:4px;margin-bottom:24px;}
.drawer-nav a{
  padding:12px 14px;border-radius:10px;font-size:15px;font-weight:500;color:var(--text-muted);
  border:1px solid transparent;
}
.drawer-nav a:hover,.drawer-nav a.active{background:var(--primary-100);color:var(--primary);font-weight:700;border-color:var(--line);}
.drawer .btn{width:100%;}
.drawer-overlay{
  position:fixed;inset:0;z-index:80;background:rgba(30,22,51,.45);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
}
.drawer-overlay.open{opacity:1;visibility:visible;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .42s cubic-bezier(.16,1,.3,1),transform .42s cubic-bezier(.16,1,.3,1);}
.reveal.in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{max-width:960px;}
  .nav-links a{padding:8px 9px;font-size:13.5px;}
  .command-search{width:200px;}
}
@media (max-width:1023px){
  .container{max-width:720px;}
  .section{padding:72px 0;}
  .nav-links,.nav-quick,.command-search,.nav-divider{display:none;}
  .nav-toggle{display:grid;place-items:center;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-media{order:-1;}
  .hero-media img{aspect-ratio:16/9;}
  .steps-layout,.faq-layout{grid-template-columns:1fr;gap:32px;}
  .steps-aside,.faq-aside{position:static;}
  .tips-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 32px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .brand-sub{display:none;}
  .hero-copy h1{font-size:clamp(26px,7vw,34px);}
  .hero-actions .btn{width:100%;}
  .hero-facts{gap:16px;}
  .fact{flex:1 1 40%;}
  .tips-block{padding:28px 20px;}
  .step{padding-left:52px;}
  .timeline::before{left:18px;}
  .step-dot{left:8px;}
  .cta-band{padding:32px 22px;border-radius:22px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --primary:#1E1633;
  --primary-600:#2E2350;
  --primary-100:#EFEBFA;
  --lime:#D8FF4A;
  --coral:#FF5C39;
  --base:#F7F6F2;
  --surface:#FFFFFF;
  --surface-alt:#F1EFE9;
  --line:#E5E2DA;
  --line-strong:#CFCBC0;
  --text:#17151C;
  --muted:#6B6875;
  --inv:#FFFFFF;
  --inv-muted:#A9A5B8;
  --success:#1F9D6B;
  --warning:#E0A020;
  --danger:#D8452F;
  --info:#4A5BD6;
  --r-card:16px;
  --r-panel:28px;
  --r-btn:10px;
  --r-input:10px;
  --sh-1:0 1px 2px rgba(30,22,51,.05), 0 12px 32px -14px rgba(30,22,51,.16);
  --sh-2:0 2px 4px rgba(30,22,51,.06), 0 22px 48px -18px rgba(30,22,51,.24);
  --sans:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --mono:"SFMono-Regular","JetBrains Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.78;
  color:var(--text);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.28}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:1279px){.container{max-width:960px}}
@media (max-width:1023px){.container{max-width:720px}}
@media (max-width:767px){.container{max-width:none;padding:0 20px}}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-btn);
  font-weight:700;font-size:15px;padding:12px 22px;transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  border:1px solid transparent;white-space:nowrap}
.btn-primary{background:var(--coral);color:#fff;box-shadow:0 8px 20px -12px rgba(255,92,57,.8)}
.btn-primary:hover{background:#F04A26;transform:translateY(-1px);box-shadow:0 12px 28px -12px rgba(255,92,57,.85)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px -10px rgba(255,92,57,.8)}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff}
.btn-lime{background:var(--lime);color:var(--primary);border-color:var(--lime)}
.btn-lime:hover{background:#C9F22F;transform:translateY(-1px)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{width:100%}
.link-underline{color:var(--primary);font-weight:600;border-bottom:1.5px solid var(--lime);padding-bottom:2px;transition:border-color .15s ease}
.link-underline:hover{border-bottom-width:3px}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(247,246,242,.92);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:height .2s ease,border-color .2s ease,box-shadow .2s ease}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 8px 24px -20px rgba(30,22,51,.5)}
.nav{display:flex;align-items:center;gap:24px;height:72px;transition:height .2s ease}
.site-header.scrolled .nav{height:64px}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{width:36px;height:36px;border-radius:11px;background:var(--primary);color:var(--lime);display:grid;place-items:center;font-weight:800;font-size:14px;letter-spacing:.02em;font-family:var(--mono)}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-weight:800;font-size:16px;letter-spacing:-.01em}
.brand-sub{font-size:12px;color:var(--muted);letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:12px}
.nav-links a{position:relative;font-size:14px;font-weight:500;color:var(--muted);padding:8px 12px;border-radius:8px;transition:color .16s ease,background .16s ease}
.nav-links a::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--lime);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);font-weight:700}
.nav-links a.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.command-search{display:flex;align-items:center;gap:10px;width:240px;height:42px;padding:0 12px;background:var(--surface-alt);border:1px solid var(--line);border-radius:var(--r-input);color:var(--muted);transition:border-color .16s ease,box-shadow .16s ease,background .16s ease}
.command-search:focus-within{border-color:var(--primary);background:#fff;box-shadow:0 0 0 2px var(--lime)}
.command-search i{font-size:13px;color:var(--muted)}
.command-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--text)}
.command-search input::placeholder{color:var(--muted)}
.kbd{font-family:var(--mono);font-size:11px;color:var(--muted);background:#fff;border:1px solid var(--line);border-radius:6px;padding:2px 6px}
.nav-divider{width:1px;height:24px;background:var(--line)}
.nav-quick{font-size:14px;font-weight:600;color:var(--primary);border-bottom:1.5px solid var(--lime);padding-bottom:2px}
.nav-quick:hover{border-bottom-width:3px}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-btn);color:var(--primary);font-size:16px;align-items:center;justify-content:center;background:#fff}

/* ---------- 移动抽屉 ---------- */
.drawer-overlay{position:fixed;inset:0;background:rgba(30,22,51,.45);opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;z-index:90}
.drawer-overlay.on{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;background:var(--surface);z-index:100;transform:translateX(100%);transition:transform .26s cubic-bezier(.16,1,.3,1);padding:20px;display:flex;flex-direction:column;gap:18px;overflow-y:auto}
.drawer.on{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-close{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;color:var(--primary);font-size:16px}
.drawer-search{width:100%}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{padding:12px 12px;border-radius:10px;font-size:15px;font-weight:600;color:var(--primary-600)}
.drawer-nav a:hover{background:var(--surface-alt)}
.drawer-nav a.active{background:var(--primary);color:#fff}
.drawer-cta{margin-top:auto}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);padding:22px 0 0;flex-wrap:wrap}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--primary)}
.crumbs i{font-size:10px;color:var(--line-strong)}
.crumbs span.current{color:var(--primary);font-weight:600}

/* ---------- Hero ---------- */
.cat-hero{padding:26px 0 72px}
.hero-inner{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--lime);color:var(--primary);font-size:13px;font-weight:700;padding:6px 14px;border-radius:999px;margin-bottom:20px}
.hero-title{font-size:clamp(28px,3.6vw,42px);line-height:1.22;font-weight:800;letter-spacing:-.03em;margin-bottom:18px}
.hero-title em{font-style:normal;background:linear-gradient(transparent 62%,var(--lime) 62%)}
.hero-sub{font-size:17px;color:var(--muted);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:32px}
.hero-stats{display:flex;gap:26px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.hero-stats div{display:flex;align-items:baseline;gap:8px}
.hero-stats b{font-family:var(--mono);font-size:18px;color:var(--primary);letter-spacing:.02em}
.hero-stats span{position:relative;padding-left:16px}
.hero-stats span::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:1px;height:16px;background:var(--line-strong)}
.hero-figure{position:relative}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;box-shadow:var(--sh-1)}
.hero-figure::after{content:"";position:absolute;inset:0;border-radius:20px;background:linear-gradient(180deg,rgba(30,22,51,.05),rgba(30,22,51,.34))}
.hero-float{position:absolute;left:-18px;bottom:-18px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 18px;box-shadow:var(--sh-1);display:flex;align-items:center;gap:12px;font-size:13px;font-weight:600;color:var(--primary)}
.dot-live{width:9px;height:9px;border-radius:50%;background:var(--success);box-shadow:0 0 0 5px rgba(31,157,107,.16);animation:breathe 6s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.55;transform:scale(.86)}}

/* ---------- 通用板块 ---------- */
.section{padding:0 0 96px}
.section-head{max-width:720px;margin-bottom:40px}
.section-tag{display:inline-block;font-size:13px;font-weight:700;color:var(--primary);background:var(--primary-100);border-radius:999px;padding:5px 14px;margin-bottom:16px}
.section-head h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3;margin-bottom:12px}
.section-head p{color:var(--muted);font-size:16px}

/* ---------- 双卡对照 ---------- */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-1);transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .2s ease,border-color .2s ease}
.compare-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.compare-head{display:flex;align-items:center;gap:12px;padding-bottom:18px;margin-bottom:18px;border-bottom:1px solid var(--line)}
.compare-head i{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-size:15px}
.compare-good .compare-head i{background:rgba(216,255,74,.55);color:var(--primary)}
.compare-bad .compare-head i{background:rgba(216,69,47,.12);color:var(--danger)}
.compare-head h3{font-size:19px}
.compare-list li{display:flex;gap:12px;padding:11px 0;font-size:15.5px;line-height:1.7;color:var(--primary-600);border-bottom:1px dashed var(--line)}
.compare-list li:last-child{border-bottom:0}
.compare-list i{flex-shrink:0;margin-top:5px;font-size:13px}
.compare-good .compare-list i{color:var(--success)}
.compare-bad .compare-list i{color:var(--danger)}

/* ---------- 图文块 ---------- */
.feature-band{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-panel);padding:32px;box-shadow:var(--sh-1);margin-top:32px}
.feature-band img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:16px}
.feature-band h3{font-size:21px;margin-bottom:12px}
.feature-band p{color:var(--muted);font-size:16px;margin-bottom:16px}
.feature-points{display:flex;flex-wrap:wrap;gap:10px}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--primary);background:var(--surface-alt);border:1px solid var(--line);border-radius:999px;padding:6px 12px}
.chip i{color:var(--success);font-size:11px}

/* ---------- 折叠清单 ---------- */
.check-list{display:grid;gap:12px}
.check-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.check-item[open]{border-color:var(--primary);box-shadow:var(--sh-1)}
.check-item summary{list-style:none;display:flex;align-items:center;gap:14px;padding:20px 22px;font-weight:700;font-size:17px;color:var(--primary);cursor:pointer;border-left:3px solid transparent;transition:border-color .2s ease,background .2s ease}
.check-item summary::-webkit-details-marker{display:none}
.check-item[open] summary{border-left-color:var(--lime);background:var(--primary-100)}
.check-num{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--coral);letter-spacing:.04em}
.check-chev{margin-left:auto;color:var(--muted);transition:transform .24s ease}
.check-item[open] .check-chev{transform:rotate(180deg)}
.check-body{padding:6px 22px 22px 22px;color:var(--primary-600)}
.check-body li{display:flex;gap:10px;padding:8px 0;font-size:15.5px;line-height:1.7}
.check-body li::before{content:"";flex-shrink:0;width:6px;height:6px;border-radius:2px;background:var(--lime);margin-top:10px}

/* ---------- 警示条 ---------- */
.warn-band{display:flex;gap:18px;align-items:flex-start;background:rgba(224,160,32,.12);border-left:4px solid var(--warning);border-radius:14px;padding:22px 24px;margin-top:32px}
.warn-band i{color:var(--warning);font-size:18px;margin-top:4px}
.warn-band h3{font-size:17px;margin-bottom:6px;color:var(--primary)}
.warn-band p{font-size:15.5px;color:var(--primary-600)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-color:var(--primary);box-shadow:var(--sh-1)}
.faq-q{width:100%;display:flex;align-items:center;gap:14px;text-align:left;padding:20px 22px;font-size:16.5px;font-weight:700;color:var(--primary);border-left:3px solid transparent;transition:background .2s ease,border-color .2s ease}
.faq-item.open .faq-q{border-left-color:var(--lime);background:var(--primary-100)}
.faq-q .faq-chev{margin-left:auto;color:var(--muted);transition:transform .24s ease;font-size:14px}
.faq-item.open .faq-chev{transform:rotate(180deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .24s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a>div{overflow:hidden}
.faq-a p{padding:0 22px 22px 22px;color:var(--muted);font-size:15.5px;line-height:1.8}

/* ---------- CTA 带 ---------- */
.cta-band{background:var(--primary);border-radius:var(--r-panel);padding:48px;display:flex;align-items:center;justify-content:space-between;gap:32px;position:relative;overflow:hidden;box-shadow:var(--sh-1)}
.cta-band::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);background-size:16px 16px;opacity:.6}
.cta-text{position:relative;z-index:1}
.cta-text h2{color:#fff;font-size:clamp(22px,2.2vw,30px);margin-bottom:10px}
.cta-text p{color:var(--inv-muted);font-size:15.5px;max-width:520px}
.cta-actions{position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--primary);color:var(--inv);border-top:2px solid var(--lime);margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:64px 0 48px}
.footer-brand .brand-name{color:#fff;font-size:16px}
.footer-brand .brand-mark{background:var(--lime);color:var(--primary)}
.footer-brand p{color:var(--inv-muted);font-size:14.5px;margin:18px 0 18px;max-width:340px;line-height:1.75}
.footer-badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--lime);background:rgba(216,255,74,.1);border:1px solid rgba(216,255,74,.3);border-radius:999px;padding:6px 14px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:18px;letter-spacing:.02em}
.footer-col a{display:block;font-size:14px;color:var(--inv-muted);padding:6px 0;transition:color .16s ease}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:22px 0 34px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--inv-muted)}
.footer-bottom a{color:var(--lime)}
.footer-bottom a:hover{text-decoration:underline}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .42s cubic-bezier(.16,1,.3,1),transform .42s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .dot-live{animation:none}
  html{scroll-behavior:auto}
  *{transition-duration:.01ms !important}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero-inner{gap:36px}
  .nav-links a{padding:8px 9px;font-size:13.5px}
  .command-search{width:200px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .command-search{display:none}
  .nav-quick{display:none}
  .nav-divider{display:none}
  .nav-toggle{display:inline-flex}
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-figure{order:-1}
  .hero-figure img{aspect-ratio:21/9}
  .hero-float{left:auto;right:14px;bottom:-16px}
  .compare-grid{grid-template-columns:1fr}
  .feature-band{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 36px}
  .section{padding-bottom:72px}
  .cat-hero{padding-bottom:56px}
}
@media (max-width:767px){
  body{font-size:16.5px}
  .nav{height:64px}
  .brand-name{font-size:15px}
  .brand-sub{font-size:11px}
  .section{padding-bottom:56px}
  .compare-card{padding:22px}
  .feature-band{padding:20px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;border-radius:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .hero-stats{gap:16px}
  .hero-stats span{padding-left:12px}
  .warn-band{padding:18px}
}
@media (max-width:479px){
  .brand-mark{width:32px;height:32px;font-size:12px}
  .hero-title{font-size:29px}
  .check-item summary{font-size:16px;padding:16px}
  .faq-q{font-size:15.5px;padding:16px}
  .footer-grid{grid-template-columns:1fr}
}

/* roulang page: category4 */
:root{
  --primary:#1E1633;
  --primary-600:#2E2350;
  --primary-100:#EFEBFA;
  --accent-lime:#D8FF4A;
  --accent-coral:#FF5C39;
  --base:#F7F6F2;
  --surface:#FFFFFF;
  --surface-alt:#F1EFE9;
  --line:#E5E2DA;
  --line-strong:#CFCBC0;
  --text:#17151C;
  --text-muted:#6B6875;
  --text-inverse:#FFFFFF;
  --text-inverse-muted:#A9A5B8;
  --success:#1F9D6B;
  --warning:#E0A020;
  --danger:#D8452F;
  --info:#4A5BD6;
  --radius-card:16px;
  --radius-panel:28px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(30,22,51,.05), 0 12px 32px -14px rgba(30,22,51,.16);
  --shadow-hover:0 2px 4px rgba(30,22,51,.06), 0 22px 48px -18px rgba(30,22,51,.24);
  --bg-soft:linear-gradient(180deg,#FFFFFF 0%,#F7F6F2 100%);
  --ease:cubic-bezier(.16,1,.3,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,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:16.5px;
  line-height:1.78;
  color:var(--text);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.3}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit}
input,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--accent-lime);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-sm{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,2.4vw,32px)}
.section-head p{color:var(--text-muted);font-size:15px;margin-top:8px;max-width:640px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.04em;
  color:var(--primary);background:var(--accent-lime);
  padding:6px 14px;border-radius:999px;
}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,246,242,.92);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease,background .2s ease;
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 6px 20px -14px rgba(30,22,51,.35);
  background:rgba(247,246,242,.97);
}
.nav{display:flex;align-items:center;gap:20px;height:72px;transition:height .2s ease}
.site-header.is-scrolled .nav{height:64px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:var(--primary);color:var(--accent-lime);
  display:grid;place-items:center;
  font-weight:800;font-size:14px;letter-spacing:.02em;
  box-shadow:0 8px 18px -10px rgba(30,22,51,.6);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:15px;font-weight:800;letter-spacing:-.01em}
.brand-sub{font-size:11.5px;color:var(--text-muted);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-links a{
  position:relative;padding:8px 12px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--text-muted);
  transition:color .18s ease,background .18s ease;
  white-space:nowrap;
}
.nav-links a:hover{color:var(--primary);background:var(--primary-100)}
.nav-links a.active{color:var(--primary);font-weight:700}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--accent-lime);border-radius:2px;
}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:240px;height:40px;padding:0 12px;
  background:var(--surface-alt);border:1px solid var(--line);
  border-radius:10px;color:var(--text-muted);
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.command-search:focus-within{
  background:var(--surface);border-color:var(--primary);
  box-shadow:0 0 0 2px var(--accent-lime);
}
.command-search i{font-size:13px}
.command-search input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:13.5px;color:var(--text);
}
.command-search input::placeholder{color:var(--text-muted)}
.kbd{
  font-size:11px;padding:2px 6px;border-radius:6px;
  background:var(--surface);border:1px solid var(--line-strong);
  color:var(--text-muted);letter-spacing:.02em;
}
.nav-divider{width:1px;height:22px;background:var(--line-strong)}
.nav-quick{font-size:13.5px;font-weight:600;color:var(--primary)}
.nav-quick:hover{color:var(--accent-coral)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  background:var(--surface);border:1px solid var(--line);
  color:var(--primary);font-size:16px;
  align-items:center;justify-content:center;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;line-height:1;
  transition:transform .15s var(--ease),background .18s ease,color .18s ease,box-shadow .18s ease,border-color .18s ease;
  border:1px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--accent-coral);color:#fff;box-shadow:0 10px 22px -12px rgba(255,92,57,.85)}
.btn-primary:hover{background:#F04A28;transform:translateY(-1px);box-shadow:var(--shadow-hover)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px -10px rgba(255,92,57,.8)}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff;transform:translateY(-1px)}
.btn-lime{background:var(--accent-lime);color:var(--primary);box-shadow:0 12px 26px -16px rgba(216,255,74,.9)}
.btn-lime:hover{background:#CBFA2E;transform:translateY(-1px);box-shadow:var(--shadow-hover)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.btn-outline-light:hover{background:rgba(255,255,255,.12);transform:translateY(-1px)}
.btn-sm{padding:10px 16px;font-size:13.5px}
.btn-block{width:100%}

/* ---------- Breadcrumb ---------- */
.breadcrumb{padding:20px 0 0;font-size:13px;color:var(--text-muted)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb li[aria-current]{color:var(--text);font-weight:600}
.breadcrumb .sep{color:var(--line-strong)}

/* ---------- Hero ---------- */
.cat-hero{padding:28px 0 64px}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-copy h1{font-size:clamp(28px,3.6vw,42px);line-height:1.22;margin:18px 0 16px}
.hero-copy .lead{font-size:17px;color:var(--text-muted);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-facts{display:flex;flex-wrap:wrap;gap:24px;margin-top:28px;padding-top:24px;border-top:1px solid var(--line)}
.hero-facts div{display:flex;flex-direction:column;gap:2px;position:relative;padding-left:14px}
.hero-facts div::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;background:var(--accent-lime)}
.hero-facts strong{font-size:20px;font-weight:800;letter-spacing:-.02em}
.hero-facts span{font-size:13px;color:var(--text-muted)}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:20px;box-shadow:var(--shadow-card);
}
.hero-media::after{
  content:"";position:absolute;inset:0;border-radius:20px;
  background:linear-gradient(180deg,rgba(30,22,51,.06),rgba(30,22,51,.28));
  pointer-events:none;
}
.float-card{
  position:absolute;left:-22px;bottom:-24px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:14px 16px;box-shadow:var(--shadow-card);
  display:flex;align-items:center;gap:12px;max-width:260px;
}
.dot-live{width:9px;height:9px;border-radius:50%;background:var(--success);box-shadow:0 0 0 0 rgba(31,157,107,.55);animation:pulse 6s infinite}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(31,157,107,.5)}
  50%{box-shadow:0 0 0 8px rgba(31,157,107,0)}
  100%{box-shadow:0 0 0 0 rgba(31,157,107,0)}
}
.float-card b{font-size:13.5px;display:block}
.float-card small{font-size:12px;color:var(--text-muted)}

/* ---------- FAQ layout ---------- */
.faq-layout{display:grid;grid-template-columns:3fr 9fr;gap:48px;align-items:start}
.side-nav{position:sticky;top:96px}
.side-nav h2{font-size:16px;font-weight:800;margin-bottom:14px}
.side-nav ul{display:flex;flex-direction:column;gap:2px}
.side-nav a{
  display:block;padding:10px 14px;border-radius:10px;
  font-size:14px;color:var(--text-muted);border-left:3px solid transparent;
  transition:color .18s ease,background .18s ease,border-color .18s ease;
}
.side-nav a:hover{background:var(--surface-alt);color:var(--primary)}
.side-nav a.is-active{
  background:var(--surface);color:var(--primary);font-weight:700;
  border-left-color:var(--accent-lime);box-shadow:var(--shadow-card);
}
.side-help{
  margin-top:24px;padding:20px;border-radius:var(--radius-card);
  background:var(--surface);border:1px solid var(--line);
}
.side-help p{font-size:13.5px;color:var(--text-muted);margin-bottom:14px}

.faq-group{margin-bottom:56px;scroll-margin-top:110px}
.faq-group:last-child{margin-bottom:0}
.faq-group > header{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.faq-group .group-no{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  background:var(--primary);color:var(--accent-lime);
  display:grid;place-items:center;font-size:14px;font-weight:800;
}
.faq-group h2{font-size:clamp(20px,2vw,25px)}
.faq-group .group-desc{color:var(--text-muted);font-size:14px;margin:0 0 20px 46px}

.faq-item{
  background:var(--surface);border:1px solid var(--line);
  border-radius:14px;margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item.open{border-color:var(--line-strong);box-shadow:var(--shadow-card)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;text-align:left;font-size:16px;font-weight:700;
  color:var(--text);position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  background:var(--accent-lime);border-radius:0 3px 3px 0;
  transform:translateX(-3px);transition:transform .24s var(--ease);
}
.faq-item.open .faq-q::before{transform:translateX(0)}
.faq-q .faq-icon{
  flex:0 0 28px;width:28px;height:28px;border-radius:8px;
  background:var(--surface-alt);color:var(--primary);
  display:grid;place-items:center;font-size:12px;
  transition:transform .24s var(--ease),background .24s ease;
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--accent-lime)}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .24s var(--ease),opacity .24s ease}
.faq-item.open .faq-a{max-height:420px;opacity:1}
.faq-a-inner{padding:0 20px 20px;color:var(--text-muted);font-size:15px}
.faq-a-inner p + p{margin-top:10px}
.faq-a-inner strong{color:var(--text)}

/* ---------- Info strip ---------- */
.notice{
  display:flex;gap:16px;align-items:flex-start;
  background:#FDF6E4;border-radius:14px;padding:18px 20px;
  border-left:4px solid var(--warning);margin-bottom:40px;
}
.notice i{color:var(--warning);font-size:18px;margin-top:3px}
.notice p{font-size:14.5px;color:#6B5A25}
.notice strong{color:#4A3D13}

/* ---------- Support card ---------- */
.support-card{
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-panel);padding:40px;box-shadow:var(--shadow-card);
}
.support-card h2{font-size:clamp(22px,2.2vw,28px);margin-bottom:10px}
.support-card p{color:var(--text-muted);font-size:15px;max-width:620px}
.support-actions{display:flex;flex-wrap:wrap;gap:12px}
.support-meta{display:flex;flex-wrap:wrap;gap:20px;margin-top:20px}
.support-meta span{font-size:13px;color:var(--text-muted);display:inline-flex;align-items:center;gap:7px}
.support-meta i{color:var(--accent-coral)}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--primary);border-radius:var(--radius-panel);
  padding:48px;color:var(--text-inverse);
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:18px 18px;opacity:.5;pointer-events:none;
}
.cta-band h2{position:relative;font-size:clamp(22px,2.4vw,30px);margin-bottom:10px}
.cta-band p{position:relative;color:var(--text-inverse-muted);font-size:15px;max-width:560px}
.cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:12px}
.cta-stats{position:relative;display:flex;flex-wrap:wrap;gap:32px;margin-top:28px}
.cta-stats div{display:flex;flex-direction:column}
.cta-stats b{font-size:24px;letter-spacing:-.02em}
.cta-stats span{font-size:12.5px;color:var(--text-inverse-muted)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:96px;background:var(--primary);color:var(--text-inverse);
  border-top:2px solid var(--accent-lime);padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-mark{background:var(--accent-lime);color:var(--primary)}
.footer-brand .brand-name{color:#fff;font-size:15px}
.footer-brand p{color:var(--text-inverse-muted);font-size:14px;max-width:340px}
.footer-badge{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;
  padding:7px 14px;border-radius:999px;font-size:12.5px;
  background:rgba(216,255,74,.12);color:var(--accent-lime);
  border:1px solid rgba(216,255,74,.28);
}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-col a{display:block;font-size:14px;color:var(--text-inverse-muted);padding:6px 0;transition:color .18s ease}
.footer-col a:hover{color:var(--accent-lime)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-inverse-muted);
}
.footer-bottom a{color:var(--text-inverse-muted);text-decoration:underline;text-underline-offset:4px}
.footer-bottom a:hover{color:var(--accent-lime)}

/* ---------- Drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(30,22,51,.45);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;
  background:var(--surface);z-index:100;padding:22px;
  transform:translateX(100%);transition:transform .28s var(--ease);
  overflow-y:auto;box-shadow:-20px 0 40px -20px rgba(30,22,51,.5);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:40px;height:40px;border-radius:10px;background:var(--surface-alt);display:grid;place-items:center;color:var(--primary)}
.drawer .command-search{width:100%;margin-bottom:18px}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:20px}
.drawer-nav a{padding:12px 14px;border-radius:10px;font-size:15px;font-weight:600;color:var(--text-muted)}
.drawer-nav a.active{background:var(--primary-100);color:var(--primary)}
.drawer-nav a:hover{background:var(--surface-alt);color:var(--primary)}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .container{max-width:960px}
  .hero-grid{gap:36px}
}
@media (max-width:1023px){
  .container{max-width:720px}
  .nav-links{display:none}
  .command-search{display:none}
  .nav-divider{display:none}
  .nav-quick{display:none}
  .nav-toggle{display:inline-flex}
  .hero-grid{grid-template-columns:1fr}
  .hero-media{order:-1}
  .hero-media img{aspect-ratio:16/9}
  .float-card{left:auto;right:12px;bottom:-20px}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .side-nav{position:static}
  .side-nav ul{flex-direction:row;flex-wrap:wrap;gap:8px}
  .side-nav a{border-left:0;border:1px solid var(--line);background:var(--surface);padding:8px 14px;border-radius:999px}
  .side-nav a.is-active{border-color:var(--primary);background:var(--primary);color:var(--accent-lime)}
  .side-help{margin-top:16px}
  .section{padding:72px 0}
  .support-card{grid-template-columns:1fr;padding:32px}
  .cta-band{grid-template-columns:1fr;padding:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{max-width:100%;padding:0 20px}
  .section{padding:56px 0}
  .brand-sub{display:none}
  .hero-copy h1{font-size:clamp(26px,7vw,32px)}
  .faq-group .group-desc{margin-left:0}
  .faq-q{font-size:15px;padding:16px}
  .notice{flex-direction:column;gap:8px}
  .cta-stats{gap:22px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  .brand-name{font-size:13.5px}
  .hero-actions .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .support-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --primary:#1E1633;
  --primary-600:#2E2350;
  --primary-100:#EFEBFA;
  --lime:#D8FF4A;
  --coral:#FF5C39;
  --base:#F7F6F2;
  --surface:#FFFFFF;
  --surface-alt:#F1EFE9;
  --line:#E5E2DA;
  --line-strong:#CFCBC0;
  --text:#17151C;
  --muted:#6B6875;
  --inverse:#FFFFFF;
  --inverse-muted:#A9A5B8;
  --success:#1F9D6B;
  --warning:#E0A020;
  --danger:#D8452F;
  --info:#4A5BD6;
  --r-card:16px;
  --r-panel:28px;
  --r-btn:10px;
  --shadow:0 1px 2px rgba(30,22,51,.05),0 12px 32px -14px rgba(30,22,51,.16);
  --shadow-hover:0 2px 4px rgba(30,22,51,.06),0 22px 48px -18px rgba(30,22,51,.24);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"SFMono-Regular","JetBrains Mono",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--base);color:var(--text);
  font-family:var(--font);font-size:17px;line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-0.02em;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:1279px){.container{max-width:960px}}
@media (max-width:1023px){.container{max-width:720px}}
@media (max-width:767px){.container{max-width:none;padding:0 20px}}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.92);
  backdrop-filter:saturate(160%) blur(12px);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid transparent;
  transition:height .2s ease,border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.site-header.scrolled{
  border-bottom:1px solid var(--line);
  box-shadow:0 8px 24px -18px rgba(30,22,51,.35);
}
.nav{display:flex;align-items:center;gap:22px;height:72px;transition:height .2s ease}
.site-header.scrolled .nav{height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex-shrink:0;
  background:var(--primary);color:var(--lime);
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:13px;letter-spacing:.02em;
  font-family:var(--mono);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-weight:800;font-size:15px;letter-spacing:-0.01em}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-links a{
  position:relative;font-size:14px;font-weight:500;color:var(--text);
  padding:9px 11px;border-radius:8px;transition:color .15s ease,background .15s ease;
}
.nav-links a:hover{background:var(--surface-alt);color:var(--primary)}
.nav-links a::after{
  content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;
  background:var(--lime);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .2s cubic-bezier(.16,1,.3,1);
}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);font-weight:700}
.nav-links a.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:240px;height:38px;padding:0 10px;
  background:var(--surface-alt);border:1px solid var(--line);border-radius:10px;
  color:var(--muted);transition:border-color .15s ease,box-shadow .15s ease,background .15s ease;
}
.command-search i{font-size:12px}
.command-search input{
  border:0;background:transparent;outline:none;width:100%;font-size:13px;color:var(--text);
}
.command-search input::placeholder{color:var(--muted)}
.command-search:focus-within{
  background:var(--surface);border-color:var(--primary);
  box-shadow:0 0 0 2px var(--lime);
}
.kbd{
  font-family:var(--mono);font-size:10px;color:var(--muted);
  background:var(--surface);border:1px solid var(--line);
  border-radius:6px;padding:2px 5px;flex-shrink:0;
}
.nav-divider{width:1px;height:22px;background:var(--line-strong);flex-shrink:0}
.nav-quick{font-size:14px;font-weight:600;color:var(--primary);border-bottom:1.5px solid var(--lime);padding-bottom:2px}
.nav-quick:hover{border-bottom-width:3px}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);color:var(--primary);
  align-items:center;justify-content:center;font-size:15px;
}
@media (max-width:1023px){
  .nav-links,.command-search,.nav-divider,.nav-quick{display:none}
  .nav-toggle{display:inline-flex}
}
@media (max-width:520px){
  .brand-sub{display:none}
  .brand-name{font-size:14px;max-width:190px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
}

/* drawer */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:90;
  background:var(--surface);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .28s cubic-bezier(.16,1,.3,1);
  display:flex;flex-direction:column;padding:20px;gap:18px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--surface-alt);display:inline-flex;align-items:center;justify-content:center}
.drawer-search{display:flex;align-items:center;gap:8px;background:var(--surface-alt);border:1px solid var(--line);border-radius:10px;padding:0 12px;height:44px}
.drawer-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px}
.drawer-nav{display:flex;flex-direction:column;gap:2px}
.drawer-nav a{padding:12px 10px;border-radius:10px;font-size:15px;font-weight:600;border-bottom:1px solid var(--line)}
.drawer-nav a:hover{background:var(--surface-alt)}
.drawer-nav a.active{background:var(--primary-100);color:var(--primary)}
.drawer .btn{width:100%;justify-content:center}
.overlay{
  position:fixed;inset:0;background:rgba(30,22,51,.45);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.overlay.open{opacity:1;visibility:visible}
body.no-scroll{overflow:hidden}

/* ============ buttons / badges ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);font-weight:700;font-size:15px;
  border:1px solid transparent;transition:all .15s ease;white-space:nowrap;
}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-primary{background:var(--coral);color:#fff;box-shadow:0 8px 20px -12px rgba(255,92,57,.8)}
.btn-primary:hover{background:#F04E2B;transform:translateY(-1px);box-shadow:0 14px 28px -14px rgba(255,92,57,.9)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px -12px rgba(255,92,57,.8)}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff}
.btn-lime{background:var(--lime);color:var(--primary);box-shadow:0 10px 26px -16px rgba(216,255,74,.9)}
.btn-lime:hover{background:#CBF23A;transform:translateY(-1px)}
.btn-line-inverse{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-line-inverse:hover{background:rgba(255,255,255,.12)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 13px;border-radius:999px;font-size:13px;font-weight:600;
  background:var(--surface-alt);color:var(--muted);
}
.badge-lime{background:var(--lime);color:var(--primary)}
.badge-soft{background:var(--primary-100);color:var(--primary)}
.badge-line{background:var(--surface);border:1px solid var(--line);color:var(--muted)}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--surface-alt);color:var(--muted);border:1px solid var(--line);
}

/* ============ hero ============ */
.page-hero{
  position:relative;overflow:hidden;padding:56px 0 62px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(620px 320px at 88% -10%,rgba(216,255,74,.24),transparent 70%),
    var(--base);
}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px;flex-wrap:wrap}
.crumbs a:hover{color:var(--primary)}
.crumbs i{font-size:10px;opacity:.7}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.page-hero h1{
  font-size:clamp(28px,3.6vw,42px);line-height:1.22;margin:16px 0 16px;
}
.page-hero h1 em{font-style:normal;background:linear-gradient(transparent 64%,var(--lime) 64%)}
.hero-lead{font-size:17px;color:var(--muted);max-width:56ch}
.hero-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;
  box-shadow:var(--shadow);
}
.hero-media::after{
  content:"";position:absolute;inset:0;border-radius:20px;
  background:linear-gradient(180deg,rgba(30,22,51,.06),rgba(30,22,51,.28));
  pointer-events:none;
}
.hero-float{
  position:absolute;left:-18px;bottom:-18px;background:var(--surface);
  border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);display:flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;
}
.pulse-dot{
  width:9px;height:9px;border-radius:50%;background:var(--lime);
  box-shadow:0 0 0 0 rgba(216,255,74,.8);animation:pulse 6s infinite;flex-shrink:0;
}
@keyframes pulse{
  0%,18%{box-shadow:0 0 0 0 rgba(216,255,74,.85)}
  45%{box-shadow:0 0 0 10px rgba(216,255,74,0)}
  100%{box-shadow:0 0 0 0 rgba(216,255,74,0)}
}
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{order:-1}
  .hero-media img{aspect-ratio:16/9}
  .hero-float{left:auto;right:14px;bottom:-14px}
}
@media (max-width:520px){
  .page-hero{padding:36px 0 48px}
  .hero-actions .btn{width:100%}
}

/* ============ section basics ============ */
.section{padding:88px 0}
.section.tight{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  color:var(--primary);letter-spacing:.04em;margin-bottom:12px;
}
.section-head .eyebrow::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--coral)}
.section-head h2{font-size:clamp(24px,2.4vw,32px)}
.section-head p{color:var(--muted);font-size:16px;max-width:60ch;margin-top:12px}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:14px;color:var(--primary);border-bottom:1.5px solid var(--lime);padding-bottom:3px}
.link-arrow:hover{border-bottom-width:3px}
@media (max-width:767px){.section{padding:56px 0}.section.tight{padding:52px 0}}

/* ============ platform cards ============ */
.platform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.platform-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px;
  transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .2s ease,border-color .2s ease;
}
.platform-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.platform-card.featured{grid-column:span 2;padding:0;overflow:hidden;flex-direction:row;gap:0}
.platform-card.featured .pc-figure{width:44%;flex-shrink:0;position:relative;overflow:hidden}
.platform-card.featured .pc-figure img{width:100%;height:100%;object-fit:cover}
.platform-card.featured .pc-body{padding:30px;display:flex;flex-direction:column;gap:14px}
.pc-top{display:flex;align-items:center;gap:12px}
.pc-icon{
  width:44px;height:44px;border-radius:12px;flex-shrink:0;
  background:var(--primary-100);color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;font-size:18px;
}
.platform-card h3{font-size:19px;line-height:1.45}
.platform-card p{font-size:15px;color:var(--muted)}
.pc-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:auto}
.platform-card .btn{align-self:flex-start}
.pc-list{display:flex;flex-direction:column;gap:8px;font-size:14px;color:var(--muted)}
.pc-list li{display:flex;gap:8px;align-items:flex-start}
.pc-list i{color:var(--success);font-size:12px;margin-top:5px}
.status-card{
  background:var(--primary);color:#fff;border-radius:var(--r-card);padding:26px;
  display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden;
}
.status-card::after{
  content:"";position:absolute;right:-40px;top:-40px;width:150px;height:150px;border-radius:50%;
  background:radial-gradient(circle,rgba(216,255,74,.28),transparent 70%);
}
.status-card h3{font-size:18px;color:#fff}
.status-card p{font-size:14px;color:var(--inverse-muted)}
.status-card .stat-row{display:flex;gap:22px;margin-top:auto;flex-wrap:wrap}
.status-card .stat-num{font-family:var(--mono);font-size:24px;font-weight:700;color:var(--lime)}
.status-card .stat-label{font-size:12px;color:var(--inverse-muted)}
@media (max-width:1023px){
  .platform-grid{grid-template-columns:repeat(2,1fr)}
  .platform-card.featured{grid-column:span 2;flex-direction:column}
  .platform-card.featured .pc-figure{width:100%;aspect-ratio:16/9}
}
@media (max-width:640px){
  .platform-grid{grid-template-columns:1fr}
  .platform-card.featured{grid-column:span 1}
}

/* ============ version table ============ */
.table-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-panel);
  box-shadow:var(--shadow);overflow:hidden;
}
.table-wrap{overflow-x:auto}
table.version-table{width:100%;border-collapse:collapse;min-width:760px;font-size:15px}
.version-table thead th{
  background:var(--primary);color:#fff;text-align:left;font-weight:700;font-size:14px;
  padding:16px 20px;white-space:nowrap;letter-spacing:.02em;
}
.version-table tbody td{padding:16px 20px;border-bottom:1px solid var(--line);color:var(--muted);vertical-align:top}
.version-table tbody tr:nth-child(even){background:#FBFAF7}
.version-table tbody tr:hover{background:var(--primary-100)}
.version-table tbody tr:last-child td{border-bottom:0}
.version-table td:first-child{font-weight:700;color:var(--text);white-space:nowrap}
.ver-code{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--primary)}
.table-note{padding:16px 20px;font-size:13px;color:var(--muted);border-top:1px solid var(--line);background:var(--surface-alt)}

/* ============ timeline ============ */
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;margin-top:12px}
.tl-node{position:relative;padding-top:36px}
.tl-node::before{
  content:"";position:absolute;top:9px;left:0;right:0;height:1px;
  border-top:1px dashed var(--line-strong);
}
.tl-node:first-child::before{left:50%}
.tl-node:last-child::before{right:50%}
.tl-dot{
  position:absolute;top:2px;left:50%;transform:translateX(-50%);
  width:16px;height:16px;border-radius:50%;background:var(--lime);
  border:3px solid var(--surface);box-shadow:0 0 0 1px var(--line-strong);
}
.tl-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow);height:100%;
}
.tl-card h3{font-size:17px;margin-bottom:8px}
.tl-card p{font-size:14px;color:var(--muted)}
.tl-time{font-family:var(--mono);font-size:12px;color:var(--coral);font-weight:700;margin-bottom:10px;display:block}
@media (max-width:767px){
  .timeline{grid-template-columns:1fr;gap:18px}
  .tl-node{padding-top:0;padding-left:30px}
  .tl-node::before{top:0;bottom:0;left:7px;right:auto;width:1px;height:auto;border-top:0;border-left:1px dashed var(--line-strong)}
  .tl-node:first-child::before{left:7px;top:8px}
  .tl-node:last-child::before{right:auto;left:7px;bottom:8px}
  .tl-dot{top:8px;left:0;transform:none}
}

/* ============ checklist strip ============ */
.check-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.check-item{
  background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--lime);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow);
}
.check-item .ci-index{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--coral);display:block;margin-bottom:10px}
.check-item h3{font-size:17px;margin-bottom:8px}
.check-item p{font-size:15px;color:var(--muted)}
@media (max-width:900px){.check-strip{grid-template-columns:1fr}}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-aside{position:sticky;top:104px}
.faq-aside h2{font-size:clamp(24px,2.4vw,32px);margin:12px 0 14px}
.faq-aside p{color:var(--muted);font-size:16px;margin-bottom:22px}
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.open{border-color:var(--line-strong);box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;text-align:left;font-size:16.5px;font-weight:700;color:var(--text);
  position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:var(--lime);transform:scaleY(0);transform-origin:center;
  transition:transform .24s cubic-bezier(.16,1,.3,1);
}
.faq-item.open .faq-q::before{transform:scaleY(1)}
.faq-q i{color:var(--muted);font-size:13px;transition:transform .24s ease}
.faq-item.open .faq-q i{transform:rotate(180deg);color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease,opacity .24s ease;opacity:0}
.faq-item.open .faq-a{opacity:1}
.faq-a-inner{padding:0 22px 22px 22px;font-size:15.5px;color:var(--muted);border-top:1px solid var(--line);padding-top:18px}
.faq-a-inner p+p{margin-top:12px}
@media (max-width:1023px){
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .faq-aside{position:static}
}

/* ============ CTA band ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--primary);color:#fff;
  border-radius:var(--r-panel);padding:48px 52px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:18px 18px;opacity:.5;
}
.cta-band h2{font-size:clamp(24px,2.4vw,30px);position:relative;z-index:1;max-width:24ch}
.cta-band p{color:var(--inverse-muted);margin-top:12px;font-size:16px;position:relative;z-index:1}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1;flex-shrink:0}
@media (max-width:1023px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:38px 30px}
  .cta-actions .btn{width:100%}
}

/* ============ footer ============ */
.site-footer{
  background:var(--primary);color:#fff;margin-top:88px;
  border-top:2px solid var(--lime);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding:64px 0 44px;
}
.footer-brand .brand-mark{background:var(--lime);color:var(--primary)}
.footer-brand .brand-name{color:#fff;font-size:16px}
.footer-brand p{color:var(--inverse-muted);font-size:14.5px;margin:18px 0 18px;max-width:34ch}
.footer-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  background:rgba(216,255,74,.14);color:var(--lime);
  border:1px solid rgba(216,255,74,.35);border-radius:999px;padding:7px 14px;
}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.04em}
.footer-col a{display:block;font-size:14px;color:var(--inverse-muted);padding:6px 0;transition:color .15s ease,transform .15s ease}
.footer-col a:hover{color:var(--lime);transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0;font-size:13px;color:var(--inverse-muted);
}
.footer-bottom a{color:var(--lime);border-bottom:1px solid transparent}
.footer-bottom a:hover{border-bottom-color:var(--lime)}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 36px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
}

/* ============ motion ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .42s cubic-bezier(.16,1,.3,1),transform .42s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}