/* roulang page: index */
:root{
  --bg:#0E0F12; --bg-2:#15171C; --panel:#1B1E24; --panel-2:#20242B;
  --border:#2A2F38; --border-hover:#FF3D7F;
  --text:#F2F3F5; --muted:#A7ADB8; --muted-2:#7C8494;
  --primary:#FF3D7F; --primary-2:#FF6B9D; --primary-ink:#0E0F12;
  --accent:#7CF5C8; --accent-2:#FFD166;
  --success:#3DDC97; --danger:#FF5C5C; --focus:#7CF5C8;
  --r-lg:18px; --r:14px; --r-sm:10px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --shadow-hover:0 16px 40px rgba(0,0,0,.45);
  --sans:system-ui,-apple-system,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono",SFMono-Regular,Consolas,"Courier New",monospace;
  --pad:84px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(circle at 50% 0,rgba(0,0,0,.7),transparent 78%);
          mask-image:radial-gradient(circle at 50% 0,rgba(0,0,0,.7),transparent 78%);
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:8px}
::selection{background:rgba(255,61,127,.35)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:var(--pad) 0;position:relative;z-index:1}
.section-tight{padding:56px 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:780px;margin-bottom:38px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);
  border:1px solid var(--border);border-radius:999px;padding:5px 12px;background:var(--panel);
}
.sec-title{font-size:clamp(1.5rem,3vw,2.25rem);line-height:1.32;margin-top:16px;letter-spacing:-.01em}
.sec-desc{color:var(--muted);margin-top:14px;font-size:16px}
.grid{display:grid;gap:24px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.mono{font-family:var(--mono)}

/* ============ header ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(14,15,18,.88);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  border-bottom:1px solid var(--border);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.01em}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;
  border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--accent));
  color:var(--primary-ink);font-family:var(--mono);font-size:14px;font-weight:700;
}
.brand-sub{color:var(--muted-2);font-size:12px;font-family:var(--mono);letter-spacing:.1em;margin-left:4px}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:9px 15px;border-radius:10px;font-size:15px;color:var(--muted);
  transition:background .2s,color .2s;
}
.nav-link:hover{background:var(--panel-2);color:var(--primary)}
.nav-link.is-active{color:var(--primary);background:rgba(255,61,127,.09)}
.nav-link.is-active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;
  border-radius:2px;background:var(--primary);
}
.nav-toggle{
  display:none;width:44px;height:40px;border:1px solid var(--border);border-radius:10px;
  background:var(--panel);cursor:pointer;padding:0;align-items:center;justify-content:center;
  flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.2s}
.nav-toggle:hover{border-color:var(--primary)}
.nav-toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-active span:nth-child(2){opacity:0}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:11px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;background:none;
  transition:background .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s;
}
.btn-primary{background:var(--primary);color:var(--primary-ink)}
.btn-primary:hover{background:var(--primary-2);transform:translateY(-1px);box-shadow:0 12px 28px rgba(255,61,127,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{border-color:var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:var(--panel-2)}
.btn-ghost{color:var(--muted)}
.btn-ghost:hover{color:var(--primary);background:var(--panel-2)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* ============ tags ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;
  border:1px solid var(--border);color:var(--muted);font-size:13px;line-height:1.6;
  transition:border-color .2s,color .2s,background .2s;
}
.tag:hover{border-color:var(--primary);color:var(--primary);background:var(--panel-2)}
.tag-accent{border-color:rgba(124,245,200,.38);color:var(--accent)}
.tag-amber{border-color:rgba(255,209,102,.38);color:var(--accent-2)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}

/* ============ hero ============ */
.hero{
  position:relative;padding:132px 0 74px;
  background:url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  border-bottom:1px solid var(--border);
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,15,18,.88),rgba(14,15,18,.95));
}
.hero-inner{position:relative;z-index:2}
.hero h1{
  font-size:clamp(2rem,5vw,3.4rem);line-height:1.26;letter-spacing:-.01em;
  margin-top:20px;max-width:20em;
}
.hero-lead{color:var(--muted);font-size:16.5px;max-width:62em;margin-top:20px}
.hero-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:44px;
  border:1px solid var(--border);border-radius:var(--radius,14px);overflow:hidden;background:var(--border);
}
.hero-cell{background:#141619;padding:20px 22px}
.hero-cell b{display:block;font-family:var(--mono);font-size:19px;color:var(--text)}
.hero-cell span{display:block;color:var(--muted-2);font-size:13px;margin-top:6px}
.hero-cell em{font-style:normal;display:block;font-size:14px;color:var(--accent);margin-top:8px}

/* ============ metrics ============ */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:16px;overflow:hidden}
.metric{background:var(--panel);padding:26px 24px}
.metric-num{display:block;font-family:var(--mono);font-size:clamp(1.5rem,2.6vw,2rem);color:var(--primary)}
.metric-label{display:block;color:var(--muted);font-size:14px;margin-top:10px}

/* ============ cards ============ */
.card{
  display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--border);
  border-radius:var(--r-lg);overflow:hidden;
  transition:border-color .25s,transform .25s,box-shadow .25s;
}
.card:hover{border-color:var(--border-hover);transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.card-cover{aspect-ratio:16/9;overflow:hidden;background:var(--panel-2)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.card:hover .card-cover img{transform:scale(1.03)}
.card-body{padding:22px;display:flex;flex-direction:column;flex:1}
.card-tag{font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.card-title{font-size:1.125rem;line-height:1.4;margin:10px 0 8px}
.card-text{color:var(--muted);font-size:15px}
.card-meta{display:flex;flex-wrap:wrap;gap:14px;margin-top:auto;padding-top:16px;color:var(--muted-2);font-size:12.5px;font-family:var(--mono)}

/* ============ rail ============ */
.rail{
  display:grid;grid-auto-flow:column;grid-auto-columns:minmax(258px,296px);gap:20px;
  overflow-x:auto;padding:4px 4px 18px;scroll-snap-type:x mandatory;
}
.rail .card{scroll-snap-align:start}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:var(--bg-2);border-radius:99px}
.rail::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px}
.rail::-webkit-scrollbar-thumb:hover{background:var(--primary)}

/* ============ hot ============ */
.hot-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:28px;align-items:start}
.feature-card{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border)}
.feature-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s}
.feature-card:hover img{transform:scale(1.02)}
.feature-card:hover{border-color:var(--border-hover)}
.feature-body{position:absolute;inset:auto 0 0 0;padding:26px;background:linear-gradient(180deg,transparent,rgba(14,15,18,.95) 55%)}
.feature-body h3{font-size:1.3rem;margin:10px 0 8px}
.feature-body p{color:var(--muted);font-size:15px}
.rank-list{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--panel);overflow:hidden}
.rank-row{
  display:flex;align-items:center;gap:16px;padding:16px 20px;
  border-bottom:1px solid var(--border);transition:background .2s;
}
.rank-row:last-child{border-bottom:0}
.rank-row:hover{background:var(--panel-2)}
.rank-num{font-family:var(--mono);font-size:15px;color:var(--accent-2);min-width:26px}
.rank-main{flex:1;min-width:0}
.rank-main b{display:block;font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-main span{display:block;color:var(--muted-2);font-size:12.5px;font-family:var(--mono);margin-top:4px}
.rank-score{font-family:var(--mono);color:var(--primary);font-size:14px}

/* ============ feature split ============ */
.feat-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:24px;align-items:stretch}
.feat-main{background:var(--panel);border:1px solid var(--border);border-radius:var(--r-lg);padding:30px;display:flex;flex-direction:column}
.feat-main h3{font-size:1.35rem;margin:14px 0 12px}
.feat-main p{color:var(--muted)}
.feat-list{display:grid;gap:24px}
.feat-item{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--r);
  padding:22px 24px;transition:border-color .25s,transform .25s,box-shadow .25s;
}
.feat-item:hover{border-color:var(--border-hover);transform:translateY(-3px);box-shadow:var(--shadow)}
.feat-item b{display:block;font-size:1.05rem;font-weight:600}
.feat-item p{color:var(--muted);font-size:14.5px;margin-top:8px}
.feat-ico{font-family:var(--mono);font-size:13px;color:var(--primary);letter-spacing:.1em}

/* ============ steps ============ */
.steps{display:grid;gap:18px}
.step{
  display:grid;grid-template-columns:70px 1fr;gap:22px;align-items:start;
  background:var(--panel);border:1px solid var(--border);border-radius:var(--r);padding:24px 26px;
  transition:border-color .25s,transform .25s;
}
.step:hover{border-color:var(--border-hover);transform:translateX(4px)}
.step-num{font-family:var(--mono);font-size:24px;color:var(--primary);line-height:1.1}
.step h3{font-size:1.1rem;margin-bottom:8px}
.step p{color:var(--muted);font-size:15px}

/* ============ preview ============ */
.preview{
  position:relative;padding:var(--pad) 0;
  background:url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.preview::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,15,18,.9),rgba(14,15,18,.96))}
.preview .container{position:relative;z-index:2}
.player-frame{
  border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;background:var(--panel);
  box-shadow:var(--shadow);
}
.player-bar{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--panel-2)}
.dot{width:10px;height:10px;border-radius:50%;background:var(--border)}
.dot.p{background:var(--primary)} .dot.a{background:var(--accent)} .dot.b{background:var(--accent-2)}
.player-url{
  margin-left:10px;flex:1;font-family:var(--mono);font-size:12.5px;color:var(--muted-2);
  border:1px solid var(--border);border-radius:8px;padding:5px 12px;background:var(--bg-2);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.player-frame img{width:100%;aspect-ratio:16/9;object-fit:cover}
.preview-split{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:28px}
.preview-note{border:1px solid var(--border);border-radius:var(--r);background:var(--panel);padding:22px 24px}
.preview-note b{display:block;font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.1em}
.preview-note p{color:var(--muted);font-size:14.5px;margin-top:10px}

/* ============ score table ============ */
.score-table{border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;background:var(--panel)}
.score-head,.score-row{display:grid;grid-template-columns:56px 1fr 120px 110px;gap:16px;align-items:center;padding:15px 22px}
.score-head{background:var(--panel-2);color:var(--muted-2);font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;border-bottom:1px solid var(--border)}
.score-row{border-bottom:1px solid var(--border);transition:background .2s}
.score-row:last-child{border-bottom:0}
.score-row:hover{background:var(--panel-2)}
.score-idx{font-family:var(--mono);color:var(--accent-2);font-size:14px}
.score-name{font-size:15px;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.score-val{font-family:var(--mono);color:var(--primary);font-size:15px}
.score-type{font-size:13px;color:var(--muted-2)}

/* ============ case ============ */
.case-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:24px;align-items:stretch}
.case-quote{
  border:1px solid var(--border);border-radius:var(--r-lg);background:var(--panel);
  padding:34px;display:flex;flex-direction:column;justify-content:space-between;
}
.case-quote blockquote{font-size:clamp(1.15rem,2vw,1.5rem);line-height:1.6;color:var(--text)}
.case-quote .case-src{margin-top:24px;color:var(--muted-2);font-family:var(--mono);font-size:13px}
.case-side{display:grid;gap:20px}
.case-side .mini{background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r);padding:22px}
.case-side .mini b{display:block;font-family:var(--mono);font-size:26px;color:var(--accent)}
.case-side .mini span{display:block;color:var(--muted);font-size:13.5px;margin-top:8px}

/* ============ plans ============ */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.plan{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:30px 26px;display:flex;flex-direction:column;transition:border-color .25s,transform .25s,box-shadow .25s;
}
.plan:hover{border-color:var(--border-hover);transform:translateY(-3px);box-shadow:var(--shadow)}
.plan.is-featured{
  background:linear-gradient(180deg,rgba(255,61,127,.09),var(--panel) 42%);
  border-color:var(--primary);box-shadow:0 18px 44px rgba(255,61,127,.16);
}
.plan-name{font-size:1.05rem;font-weight:600}
.plan-price{font-family:var(--mono);font-size:2.1rem;color:var(--primary);margin:14px 0 6px}
.plan-price small{font-size:14px;color:var(--muted-2);font-family:var(--sans);margin-left:6px}
.plan-desc{color:var(--muted);font-size:14.5px;min-height:48px}
.plan ul{margin:20px 0;display:grid;gap:10px}
.plan li{position:relative;padding-left:20px;color:var(--muted);font-size:14.5px}
.plan li::before{content:"";position:absolute;left:0;top:12px;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.plan .btn{margin-top:auto;width:100%}
.plan-badge{
  align-self:flex-start;margin-bottom:14px;font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;
  color:var(--accent);border:1px solid rgba(124,245,200,.4);border-radius:999px;padding:4px 11px;
}

/* ============ reviews ============ */
.wall{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.wall-col{display:grid;gap:22px}
.wall-col.second{margin-top:34px}
.review{background:var(--panel);border:1px solid var(--border);border-radius:var(--r);padding:22px 24px;transition:border-color .25s,transform .25s}
.review:hover{border-color:var(--border-hover);transform:translateY(-3px)}
.review p{color:var(--muted);font-size:14.8px}
.review-user{display:flex;align-items:center;gap:12px;margin-top:16px}
.avatar{
  width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--panel-2);border:1px solid var(--border);font-family:var(--mono);font-size:14px;color:var(--accent);
}
.review-user b{display:block;font-size:14px}
.review-user span{display:block;color:var(--muted-2);font-size:12.5px;font-family:var(--mono)}

/* ============ trust pills ============ */
.pills{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pill{
  border:1px solid var(--border);border-radius:var(--r);background:var(--panel-2);
  padding:22px 24px;transition:border-color .25s,background .2s;
}
.pill:hover{border-color:var(--border-hover)}
.pill b{display:block;font-family:var(--mono);font-size:22px;color:var(--text)}
.pill span{display:block;color:var(--muted);font-size:14px;margin-top:8px}

/* ============ updates ============ */
.log{display:grid;gap:0;border-left:1px dashed var(--border);margin-left:8px}
.log-item{position:relative;padding:0 0 26px 28px}
.log-item::before{content:"";position:absolute;left:-5px;top:10px;width:9px;height:9px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 4px rgba(255,61,127,.14)}
.log-date{font-family:var(--mono);font-size:12.5px;color:var(--accent)}
.log-item b{display:block;font-size:15.5px;margin:8px 0 6px}
.log-item p{color:var(--muted);font-size:14.5px}

/* ============ guide ============ */
.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.guide-panel{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--panel);padding:28px}
.guide-panel h3{font-size:1.15rem;margin-bottom:16px}
.guide-list{display:grid;gap:12px}
.guide-list li{position:relative;padding-left:24px;color:var(--muted);font-size:15px}
.guide-list li::before{
  content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:3px;
  background:rgba(124,245,200,.18);border:1px solid var(--accent);
}

/* ============ faq ============ */
.faq{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--panel);overflow:hidden}
.faq details{border-bottom:1px solid var(--border)}
.faq details:last-child{border-bottom:0}
.faq summary{
  cursor:pointer;list-style:none;padding:20px 24px;font-size:16px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;line-height:1.6;
  transition:background .2s,color .2s;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{background:var(--panel-2);color:var(--primary)}
.faq summary::after{
  content:"+";font-family:var(--mono);color:var(--primary);font-size:20px;line-height:1;
  transition:transform .25s;
}
.faq details[open] summary::after{content:"−";transform:rotate(180deg)}
.faq .faq-a{padding:0 24px 22px;color:var(--muted);font-size:15px}

/* ============ cta ============ */
.cta{
  position:relative;margin:0;padding:64px 0;
  background:linear-gradient(120deg,var(--primary),#C9205C 70%);
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.cta::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;opacity:.16;mix-blend-mode:luminosity;
}
.cta .container{position:relative;z-index:2}
.cta-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.cta h2{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.3;color:#fff}
.cta p{color:rgba(255,255,255,.88);margin-top:14px}
.form-card{
  background:rgba(14,15,18,.86);border:1px solid rgba(255,255,255,.18);
  border-radius:var(--r-lg);padding:26px;
}
.form-field{display:grid;gap:10px;margin-bottom:16px}
.form-field label{font-size:13.5px;color:var(--muted);font-family:var(--mono);letter-spacing:.06em}
.form-field input{
  width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--border);
  background:var(--panel-2);color:var(--text);transition:border-color .2s,box-shadow .2s;
}
.form-field input::placeholder{color:var(--muted-2)}
.form-field input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(124,245,200,.25)}
.form-field input.error{border-color:var(--danger)}
.form-note{font-size:12.8px;color:var(--muted-2);margin-top:14px}
.form-note.ok{color:var(--success)}

/* ============ copyright ============ */
.notice{
  border:1px solid var(--border);border-radius:var(--r-lg);background:var(--panel);
  padding:30px;display:grid;grid-template-columns:1.1fr .9fr;gap:30px;
}
.notice h3{font-size:1.15rem;margin-bottom:14px}
.notice-list{display:grid;gap:12px}
.notice-list li{position:relative;padding-left:22px;color:var(--muted);font-size:14.6px}
.notice-list li::before{content:"·";position:absolute;left:6px;top:-1px;color:var(--primary);font-size:20px;line-height:1.4}
.notice-side{border-left:1px solid var(--border);padding-left:30px}
.notice-side p{color:var(--muted);font-size:14.4px}
.notice-side .mono{color:var(--accent);font-size:13px;display:block;margin-top:14px}

/* ============ footer ============ */
.site-footer{background:var(--bg-2);border-top:1px solid var(--border);padding:64px 0 30px;position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand p{color:var(--muted);font-size:14.5px;margin-top:16px;max-width:34em}
.footer-col h4{font-size:14px;font-family:var(--mono);letter-spacing:.1em;color:var(--muted-2);text-transform:uppercase;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a,.footer-col span{color:var(--muted);font-size:14.5px;transition:color .2s}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  color:var(--muted-2);font-size:13.2px;font-family:var(--mono);
}
.footer-bottom a:hover{color:var(--primary)}

/* ============ responsive ============ */
@media (max-width:1024px){
  :root{--pad:64px}
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:fixed;top:68px;left:0;right:0;bottom:0;z-index:70;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:26px 20px 40px;background:rgba(14,15,18,.98);
    border-top:1px solid var(--border);overflow:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .24s,transform .24s,visibility .24s;
  }
  .nav-links.is-open{opacity:1;visibility:visible;transform:none}
  .nav-link{font-size:18px;padding:15px 18px;border-radius:12px}
  .nav-link.is-active::after{display:none}
  .hot-grid,.feat-grid,.case-grid,.cta-grid,.notice,.guide-grid{grid-template-columns:1fr}
  .hero-strip{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .plans{grid-template-columns:1fr;gap:18px}
  .plan.is-featured{order:-1}
  .notice-side{border-left:0;border-top:1px solid var(--border);padding-left:0;padding-top:24px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .g-4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  :root{--pad:52px}
  .container{padding:0 20px}
  body{font-size:15.5px}
  .hero{padding:112px 0 56px}
  .hero-strip{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr}
  .g-2,.g-3,.g-4{grid-template-columns:1fr}
  .wall{grid-template-columns:1fr}
  .wall-col.second{margin-top:0}
  .pills{grid-template-columns:1fr}
  .step{grid-template-columns:1fr;gap:12px}
  .score-head{display:none}
  .score-row{grid-template-columns:38px 1fr;gap:12px;row-gap:6px;padding:16px 18px}
  .score-val,.score-type{grid-column:2}
  .preview-split{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  h1{font-size:1.9rem}
  .sec-title{font-size:1.45rem}
  .btn{width:100%}
  .btn-row{flex-direction:column}
  .rail{grid-auto-columns:minmax(230px,84%)}
  .player-url{display:none}
}

/* roulang page: category1 */
:root{
  --bg:#0E0F12; --bg-2:#15171C; --panel:#1B1E24; --panel-2:#20242B;
  --border:#2A2F38; --border-hover:#FF3D7F;
  --text:#F2F3F5; --muted:#A7ADB8; --muted-2:#7C8494;
  --primary:#FF3D7F; --primary-2:#FF6B9D; --primary-ink:#0E0F12;
  --accent:#7CF5C8; --accent-2:#FFD166;
  --success:#3DDC97; --danger:#FF5C5C; --focus:#7CF5C8;
  --r-lg:18px; --r:14px; --r-sm:10px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --shadow-hover:0 16px 40px rgba(0,0,0,.45);
  --sans:system-ui,-apple-system,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono",SFMono-Regular,Consolas,"Courier New",monospace;
  --pad:84px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(circle at 50% 0,rgba(0,0,0,.7),transparent 78%);
  mask-image:radial-gradient(circle at 50% 0,rgba(0,0,0,.7),transparent 78%);
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
p{margin-bottom:1em}
p:last-child{margin-bottom:0}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--focus);outline-offset:2px;border-radius:8px;
}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:var(--pad) 0;position:relative;z-index:1}
.section-tight{padding:56px 0;position:relative;z-index:1}
.section-alt{background:var(--bg-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:820px;margin-bottom:38px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);
  border:1px solid var(--border);border-radius:999px;padding:5px 12px;background:var(--panel);
}
.sec-title{font-size:clamp(1.5rem,3vw,2.25rem);line-height:1.32;margin-top:16px;letter-spacing:-.01em}
.sec-desc{color:var(--muted);margin-top:14px;max-width:64em}
.grid{display:grid;gap:24px}

/* header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(14,15,18,.88);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  border-bottom:1px solid var(--border);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.01em}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;
  border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--accent));
  color:var(--primary-ink);font-family:var(--mono);font-size:14px;font-weight:700;
}
.brand-sub{color:var(--muted-2);font-size:12px;font-family:var(--mono);letter-spacing:.1em;margin-left:4px}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:9px 15px;border-radius:10px;font-size:15px;color:var(--muted);
  transition:background .2s,color .2s;
}
.nav-link:hover{background:var(--panel-2);color:var(--primary)}
.nav-link.is-active{color:var(--primary);background:rgba(255,61,127,.09)}
.nav-link.is-active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;
  border-radius:2px;background:var(--primary);
}
.nav-toggle{
  display:none;width:44px;height:40px;border:1px solid var(--border);border-radius:10px;
  background:var(--panel);cursor:pointer;padding:0;align-items:center;justify-content:center;
  flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.2s}
.nav-toggle:hover{border-color:var(--primary)}
.nav-toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-active span:nth-child(2){opacity:0}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-drawer{
  display:none;position:fixed;top:68px;left:0;right:0;bottom:0;z-index:79;
  background:rgba(14,15,18,.98);border-top:1px solid var(--border);
  padding:24px;overflow-y:auto;flex-direction:column;gap:8px;
}
.nav-drawer.is-open{display:flex}
.nav-drawer a{
  padding:16px 18px;border:1px solid var(--border);border-radius:12px;
  font-size:17px;color:var(--text);background:var(--panel);
}
.nav-drawer a.is-active{color:var(--primary);border-color:var(--border-hover)}
.nav-drawer a:hover{border-color:var(--primary);color:var(--primary)}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:11px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;background:none;
  transition:background .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s;
}
.btn-primary{background:var(--primary);color:var(--primary-ink)}
.btn-primary:hover{background:var(--primary-2);transform:translateY(-1px);box-shadow:0 12px 28px rgba(255,61,127,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{border-color:var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:var(--panel-2)}
.btn-ghost{color:var(--muted)}
.btn-ghost:hover{color:var(--primary);background:var(--panel-2)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* tags */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;
  border:1px solid var(--border);color:var(--muted);font-size:13px;line-height:1.6;
  transition:border-color .2s,color .2s,background .2s;
}
.tag:hover{border-color:var(--primary);color:var(--primary);background:var(--panel-2)}
.tag-accent{border-color:rgba(124,245,200,.38);color:var(--accent)}
.tag-amber{border-color:rgba(255,209,102,.38);color:var(--accent-2)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}

/* category hero */
.cat-hero{
  position:relative;padding:124px 0 60px;margin-top:0;
  background:url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  border-bottom:1px solid var(--border);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,15,18,.9),rgba(14,15,18,.96));
}
.cat-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted-2);font-family:var(--mono)}
.crumb a:hover{color:var(--primary)}
.cat-hero h1{
  font-size:clamp(1.9rem,4.2vw,3rem);line-height:1.28;letter-spacing:-.01em;margin-top:18px;max-width:24em;
}
.cat-hero h1 em{font-style:normal;color:var(--primary)}
.cat-lead{color:var(--muted);max-width:66em;margin-top:18px;font-size:16.5px}
.cat-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:36px;
  border:1px solid var(--border);border-radius:var(--r);overflow:hidden;background:var(--border);
}
.cat-stat{background:var(--panel);padding:20px 22px}
.cat-stat strong{
  display:block;font-family:var(--mono);font-size:26px;color:var(--accent);letter-spacing:-.02em;line-height:1.3;
}
.cat-stat span{font-size:13px;color:var(--muted-2)}

/* filter bar */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;justify-content:space-between;
  border:1px solid var(--border);border-radius:var(--r);background:var(--panel);
  padding:16px 20px;
}
.filter-group{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-label{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--muted-2);text-transform:uppercase;margin-right:2px}
.chip{
  padding:7px 15px;border-radius:999px;border:1px solid var(--border);background:var(--panel-2);
  color:var(--muted);font-size:14px;cursor:pointer;transition:.2s;
}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip.is-on{background:rgba(255,61,127,.12);border-color:var(--border-hover);color:var(--primary)}
.view-switch{display:flex;gap:6px;border:1px solid var(--border);border-radius:10px;padding:4px;background:var(--panel-2)}
.view-switch button{
  border:none;background:none;padding:7px 14px;border-radius:8px;font-size:14px;color:var(--muted);cursor:pointer;transition:.2s;
}
.view-switch button.is-on{background:var(--panel);color:var(--primary)}
.view-switch button:hover{color:var(--primary)}

/* card grid */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px}
.card{
  display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--border);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);
  transition:border-color .25s,transform .25s,box-shadow .25s;
}
.card:hover{border-color:var(--border-hover);transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--panel-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-badge{
  position:absolute;top:12px;left:12px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;
  padding:4px 10px;border-radius:999px;background:rgba(14,15,18,.82);color:var(--accent);
  border:1px solid rgba(124,245,200,.32);
}
.card-badge.amber{color:var(--accent-2);border-color:rgba(255,209,102,.32)}
.card-time{
  position:absolute;right:12px;bottom:12px;font-family:var(--mono);font-size:12px;
  padding:3px 9px;border-radius:8px;background:rgba(14,15,18,.85);color:var(--text);
}
.card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:1.15rem;line-height:1.4}
.card-body p{color:var(--muted);font-size:14.5px;line-height:1.78}
.card-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--muted-2);font-family:var(--mono);
}
.more-row{display:flex;justify-content:center;margin-top:40px}

/* tag wall */
.tag-wall{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.tag-wall .tag{font-size:14px;padding:8px 18px}

/* guide */
.guide-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:34px}
.guide-item{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:26px;position:relative;transition:border-color .25s,transform .25s,box-shadow .25s;
}
.guide-item:hover{border-color:var(--border-hover);transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.guide-num{
  font-family:var(--mono);font-size:13px;letter-spacing:.12em;color:var(--accent);
  display:inline-flex;align-items:center;gap:8px;
}
.guide-item h3{font-size:1.1rem;margin-top:14px;line-height:1.45}
.guide-item p{color:var(--muted);font-size:14.5px;margin-top:10px}
.guide-item ul{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.guide-item li{
  color:var(--muted);font-size:14px;padding-left:16px;position:relative;
}
.guide-item li::before{
  content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--primary);
}
.guide-item a{color:var(--text);border-bottom:1px solid rgba(255,61,127,.4)}
.guide-item a:hover{color:var(--primary)}

/* faq */
.faq{margin-top:30px;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;background:var(--panel)}
.faq details{border-bottom:1px solid var(--border)}
.faq details:last-child{border-bottom:none}
.faq summary{
  cursor:pointer;list-style:none;padding:22px 26px;font-size:16px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:18px;line-height:1.6;
  transition:background .2s,color .2s;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{background:var(--panel-2);color:var(--primary)}
.faq summary::after{
  content:"+";font-family:var(--mono);font-size:20px;color:var(--primary);
  transition:transform .25s;flex:none;
}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .faq-body{padding:0 26px 24px;color:var(--muted);font-size:15px;line-height:1.85}

/* recommend */
.rec-list{margin-top:30px;display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.rec-item{
  display:flex;gap:18px;align-items:center;background:var(--panel);border:1px solid var(--border);
  border-radius:var(--r);padding:16px;transition:border-color .25s,background .25s,transform .25s;
}
.rec-item:hover{border-color:var(--border-hover);background:var(--panel-2);transform:translateX(3px)}
.rec-item img{width:112px;aspect-ratio:16/9;object-fit:cover;border-radius:10px;flex:none}
.rec-item h3{font-size:1rem;line-height:1.45}
.rec-item span{display:block;margin-top:6px;font-size:13px;color:var(--muted-2);font-family:var(--mono)}

/* cta */
.cta-band{
  position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);
  background:url('/assets/images/backpic/back-5.jpg') center/cover no-repeat;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(255,61,127,.92),rgba(14,15,18,.9));
}
.cta-inner{position:relative;z-index:2;padding:52px 44px;display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center}
.cta-inner h2{font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.32}
.cta-inner p{color:rgba(242,243,245,.86);margin-top:14px;font-size:15.5px}
.cta-form{display:flex;gap:12px;flex-wrap:wrap}
.cta-form input{
  flex:1 1 200px;min-width:0;padding:13px 16px;border-radius:10px;border:1px solid rgba(255,255,255,.28);
  background:rgba(14,15,18,.55);color:var(--text);font-size:15px;transition:border-color .2s,box-shadow .2s;
}
.cta-form input::placeholder{color:rgba(242,243,245,.55)}
.cta-form input:focus{border-color:var(--focus);box-shadow:0 0 0 3px rgba(124,245,200,.28);outline:none}
.cta-form input.is-error{border-color:var(--danger)}
.cta-form .btn-primary{background:#0E0F12;color:var(--text)}
.cta-form .btn-primary:hover{background:#000;color:var(--primary-2)}
.form-hint{font-size:13px;color:rgba(242,243,245,.72);margin-top:12px}
.form-hint.ok{color:#0E0F12}

/* footer */
.site-footer{background:var(--bg-2);border-top:1px solid var(--border);padding:64px 0 30px;position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px}
.footer-brand p{color:var(--muted);font-size:14.5px;margin-top:16px;max-width:34em}
.footer-col h4{font-size:14px;font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted-2);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{color:var(--muted);font-size:14.5px;transition:color .2s}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--muted-2);font-family:var(--mono);
}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}

@media (max-width:1024px){
  :root{--pad:64px}
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .guide-list{grid-template-columns:1fr;gap:20px}
  .cta-inner{grid-template-columns:1fr;padding:44px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cat-stats{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .section{padding:var(--pad) 0}
  .container{padding:0 20px}
  .cat-hero{padding:110px 0 52px}
  .card-grid{grid-template-columns:1fr}
  .rec-list{grid-template-columns:1fr}
  .filter-bar{padding:14px 16px}
  .faq summary{padding:18px 20px;font-size:15px}
  .faq .faq-body{padding:0 20px 20px}
}
@media (max-width:520px){
  :root{--pad:52px}
  body{font-size:15.5px}
  .brand-sub{display:none}
  .cat-stats{grid-template-columns:1fr}
  .cat-stat{padding:16px 18px}
  .cta-inner{padding:34px 22px}
  .footer-grid{grid-template-columns:1fr}
  .rec-item img{width:92px}
  .btn-row{gap:10px}
  .btn{padding:11px 18px;font-size:14.5px}
}