/* roulang page: index */
:root{
  --c-primary:#35F2E0;
  --c-accent:#FF4FA3;
  --c-violet:#8A6BFF;
  --bg-deep:#0A0E1A;
  --bg-raise:#111726;
  --bg-elevated:#161E31;
  --bg-strip:#0D1322;
  --tx-1:#EAF2FF;
  --tx-2:#A8B6D1;
  --tx-3:#6B7A99;
  --line:rgba(53,242,224,.14);
  --line-strong:rgba(53,242,224,.42);
  --glow-cyan:0 0 0 1px rgba(53,242,224,.35),0 0 18px rgba(53,242,224,.28);
  --glow-magenta:0 0 0 1px rgba(255,79,163,.4),0 0 20px rgba(255,79,163,.25);
  --sh-1:0 6px 20px rgba(0,0,0,.35);
  --sh-2:0 12px 32px rgba(0,0,0,.5);
  --r-card:16px;
  --r-btn:10px;
  --r-panel:20px;
  --r-img:14px;
  --mono:"DIN Alternate","Roboto Mono","SFMono-Regular",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;min-height:100vh;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  background:var(--bg-deep);color:var(--tx-2);
  font-size:16px;line-height:1.85;font-weight:400;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    radial-gradient(circle at 14% 6%,rgba(53,242,224,.10),transparent 44%),
    radial-gradient(circle at 86% 3%,rgba(138,107,255,.12),transparent 42%);
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--c-primary);text-decoration:none;transition:color .22s ease,background-color .22s ease,opacity .22s ease}
a:hover{color:#7ff9ec}
h1,h2,h3,h4{color:var(--tx-1);margin:0;font-weight:700;line-height:1.35}
p{margin:0 0 1em;text-align:left}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
::selection{background:rgba(53,242,224,.28);color:#fff}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:88px 0;position:relative}
.section--strip{background:var(--bg-strip);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;flex-wrap:wrap}
.section-title{font-size:28px;line-height:1.3;position:relative;padding-left:16px}
.section-title::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:2px;background:linear-gradient(180deg,var(--c-primary),var(--c-accent))}
.section-sub{margin:10px 0 0;font-size:15px;color:var(--tx-3);max-width:640px}
.more-link{font-size:14px;color:var(--c-primary);border-bottom:1px solid rgba(53,242,224,.35);padding-bottom:2px}
.more-link:hover{border-bottom-color:var(--c-primary)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 28px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  transition:all .22s ease;white-space:nowrap;border:1px solid transparent;line-height:1.2;
  min-height:46px;
}
.btn-primary{background:var(--c-primary);color:#04211F;border-color:var(--c-primary)}
.btn-primary:hover{background:#5cf7e8;color:#04211F;box-shadow:var(--glow-cyan);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:rgba(53,242,224,.55)}
.btn-ghost:hover{background:rgba(53,242,224,.12);color:var(--c-primary);transform:translateY(-2px)}
.btn-magenta{background:transparent;color:var(--c-accent);border-color:rgba(255,79,163,.6)}
.btn-magenta:hover{background:rgba(255,79,163,.14);color:#ff86bd;box-shadow:var(--glow-magenta);transform:translateY(-2px)}
.btn-solid-magenta{background:var(--c-accent);color:#2A0518;border-color:var(--c-accent)}
.btn-solid-magenta:hover{background:#ff74b8;color:#2A0518;box-shadow:var(--glow-magenta);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px;min-height:40px}
.btn-block{width:100%}

/* ============ 徽章 / 标签 ============ */
.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 12px;border-radius:999px;font-size:13px;line-height:1.6;font-weight:500}
.badge-cyan{background:rgba(53,242,224,.12);color:#7ef4e7;border:1px solid rgba(53,242,224,.28)}
.badge-violet{background:rgba(138,107,255,.14);color:#b6a2ff;border:1px solid rgba(138,107,255,.3)}
.badge-magenta{background:rgba(255,79,163,.14);color:#ff92c4;border:1px solid rgba(255,79,163,.32)}
.tag{display:inline-block;padding:4px 12px;border-radius:999px;font-size:13px;border:1px solid var(--line);color:var(--tx-2);background:var(--bg-raise)}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,26,.82);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,rgba(53,242,224,.75),rgba(138,107,255,.6),rgba(255,79,163,.4),transparent);
}
.nav-wrap{display:flex;align-items:center;gap:28px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:30px;height:30px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(140deg,var(--c-primary),var(--c-violet) 55%,var(--c-accent));
  box-shadow:0 0 14px rgba(53,242,224,.4);
  position:relative;
}
.brand-mark::after{content:"";position:absolute;inset:8px;border-radius:50%;background:var(--bg-deep);opacity:.85}
.brand-text{font-size:17px;font-weight:700;color:var(--tx-1);letter-spacing:.5px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px;flex:1}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 16px;
  border-radius:8px;color:var(--tx-2);font-size:15px;font-weight:500;
  transition:all .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:20%;right:20%;bottom:4px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transition:transform .22s ease;opacity:.9;
}
.nav-link:hover{color:var(--tx-1);background:rgba(255,255,255,.04)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{
  color:var(--c-primary);background:rgba(53,242,224,.08);
  box-shadow:inset 0 -2px 0 rgba(53,242,224,.55);
}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--tx-1);transition:transform .22s ease,opacity .22s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:92px 0 76px;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.3;filter:saturate(.85)}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,14,26,.6),rgba(10,14,26,.93) 76%,var(--bg-deep));
}
.hero-glow{
  position:absolute;right:-80px;bottom:-140px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(53,242,224,.22),transparent 65%);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;position:relative;z-index:2}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#7ef4e7;
  background:rgba(53,242,224,.1);border:1px solid rgba(53,242,224,.28);
  padding:5px 14px;border-radius:999px;margin-bottom:20px;
}
.hero h1{font-size:40px;line-height:1.25;letter-spacing:0;margin-bottom:18px}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,var(--c-primary),var(--c-violet) 60%,var(--c-accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17px;line-height:1.8;color:var(--tx-2);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--tx-3)}
.hero-points li{display:flex;align-items:center;gap:8px}
.hero-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary);box-shadow:0 0 8px rgba(53,242,224,.8);flex-shrink:0}
.hero-visual{position:relative;border-radius:var(--r-panel);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-2)}
.hero-visual img{width:100%;height:340px;object-fit:cover;border-radius:0}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(200deg,rgba(10,14,26,.1),rgba(10,14,26,.72));pointer-events:none}
.status-badge{
  position:absolute;left:18px;bottom:18px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(10,14,26,.85);border:1px solid rgba(53,242,224,.35);
  color:#7ef4e7;font-size:13px;padding:7px 15px;border-radius:999px;backdrop-filter:blur(6px);
}
.status-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--c-primary);box-shadow:0 0 10px var(--c-primary);animation:pulse 2.2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}

/* ============ 数据条 ============ */
.stats-bar{background:var(--bg-strip);border-bottom:1px solid var(--line);position:relative}
.stats-bar::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(53,242,224,.45),transparent)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:38px 0}
.stat-item{text-align:left;padding-left:18px;border-left:2px solid rgba(53,242,224,.24)}
.stat-num{font-family:var(--mono);font-size:30px;font-weight:700;color:var(--c-primary);line-height:1.2;letter-spacing:.5px}
.stat-label{font-size:13px;color:var(--tx-3);margin-top:4px}

/* ============ 阶梯 ============ */
.stairs{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;align-items:end;margin-top:12px}
.stair-card{
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 20px 26px;box-shadow:var(--sh-1);transition:all .25s ease;position:relative;overflow:hidden;
}
.stair-card::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,transparent,rgba(53,242,224,.6),transparent);opacity:0;transition:opacity .25s ease}
.stair-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.stair-card:hover::before{opacity:1}
.stair-1{margin-top:72px}
.stair-2{margin-top:48px}
.stair-3{margin-top:24px}
.stair-4{margin-top:0;border-color:rgba(255,79,163,.38);box-shadow:var(--glow-magenta)}
.stair-index{font-family:var(--mono);font-size:13px;color:var(--tx-3);letter-spacing:2px}
.stair-card h3{font-size:18px;margin:10px 0 8px}
.stair-card p{font-size:14px;line-height:1.8;color:var(--tx-2);margin-bottom:14px}
.stair-list{display:flex;flex-direction:column;gap:7px;font-size:14px;color:var(--tx-2)}
.stair-list li{display:flex;gap:8px;align-items:flex-start}
.stair-list li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--c-primary);margin-top:10px;flex-shrink:0}
.stair-4 .stair-list li::before{background:var(--c-accent)}

/* ============ 套餐对比 ============ */
.compare{display:grid;grid-template-columns:1.15fr 1.15fr .72fr;gap:20px;align-items:stretch}
.plan{
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-1);display:flex;flex-direction:column;position:relative;transition:all .25s ease;
}
.plan:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--line-strong)}
.plan--hot{border-color:rgba(255,79,163,.45);box-shadow:var(--glow-magenta)}
.plan-flag{
  position:absolute;top:0;right:0;font-size:12px;color:#2A0518;font-weight:700;
  background:linear-gradient(120deg,var(--c-accent),var(--c-violet));
  padding:5px 16px 5px 20px;border-radius:0 var(--r-card) 0 14px;letter-spacing:1px;
}
.plan-name{font-size:20px;margin-bottom:6px}
.plan-desc{font-size:14px;color:var(--tx-3);margin-bottom:18px}
.plan-rows{border-radius:12px;overflow:hidden;margin-bottom:20px}
.plan-row{display:flex;justify-content:space-between;gap:12px;padding:11px 14px;font-size:14px;background:var(--bg-strip)}
.plan-row:nth-child(even){background:rgba(22,30,49,.7)}
.plan-row span:first-child{color:var(--tx-3)}
.plan-row span:last-child{color:var(--tx-1);font-weight:500;text-align:right}
.plan-narrow{background:var(--bg-elevated);border-style:dashed}
.plan-narrow .plan-name{font-size:17px}
.plan-note{font-size:13px;color:var(--tx-3);line-height:1.8}
.plan-cta{margin-top:auto}

/* ============ 限时入口 ============ */
.limit-panel{
  background:var(--bg-elevated);border:1px solid rgba(255,79,163,.4);border-radius:var(--r-panel);
  padding:38px 36px;box-shadow:var(--glow-magenta);
  display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center;
}
.limit-panel h2{font-size:26px;margin-bottom:10px}
.limit-panel p{font-size:15px;color:var(--tx-2);margin:0}
.countdown{display:flex;align-items:center;gap:8px;margin:20px 0 0}
.cd-block{
  min-width:60px;text-align:center;padding:10px 8px;border-radius:8px;
  background:var(--bg-deep);border:1px solid var(--line);box-shadow:inset 0 2px 8px rgba(0,0,0,.6);
}
.cd-num{font-family:var(--mono);font-size:26px;font-weight:700;color:var(--c-accent);line-height:1.1}
.cd-label{font-size:12px;color:var(--tx-3);margin-top:2px}
.cd-sep{font-family:var(--mono);font-size:22px;color:var(--tx-3);padding-bottom:14px}
.limit-action{display:flex;flex-direction:column;gap:12px;align-items:flex-end}
.limit-note{font-size:13px;color:var(--tx-3)}

/* ============ 最新信息 ============ */
.news-layout{display:grid;grid-template-columns:8fr 4fr;gap:28px;align-items:start}
.news-main{display:flex;flex-direction:column;gap:18px}
.news-card{
  display:grid;grid-template-columns:220px 1fr;gap:20px;
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px;box-shadow:var(--sh-1);transition:all .25s ease;align-items:center;
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.news-thumb{display:block;border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/9;background:var(--bg-strip)}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .35s ease}
.news-card:hover .news-thumb img{transform:scale(1.05)}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:8px;flex-wrap:wrap}
.news-meta time{font-family:var(--mono);font-size:13px;color:var(--tx-3)}
.news-title{font-size:18px;line-height:1.5;margin-bottom:8px}
.news-title a{color:var(--tx-1)}
.news-title a:hover{color:var(--c-primary)}
.news-excerpt{font-size:14px;color:var(--tx-2);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-side{
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 20px;box-shadow:var(--sh-1);position:sticky;top:96px;
}
.news-side h3{font-size:17px;margin-bottom:16px;padding-left:12px;position:relative}
.news-side h3::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:3px;border-radius:2px;background:linear-gradient(180deg,var(--c-primary),var(--c-violet))}
.rank-list{display:flex;flex-direction:column}
.rank-item{display:flex;gap:12px;align-items:flex-start;padding:11px 8px;border-bottom:1px solid var(--line);border-radius:8px;transition:background-color .2s ease}
.rank-item:last-child{border-bottom:none}
.rank-item:hover{background:rgba(53,242,224,.06)}
.rank-num{font-family:var(--mono);font-size:18px;font-weight:700;color:var(--c-primary);opacity:.75;line-height:1.5;flex-shrink:0}
.rank-title{font-size:14px;color:var(--tx-2);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rank-item:hover .rank-title{color:var(--tx-1)}
.rank-empty{font-size:14px;color:var(--tx-3);margin:0}
.empty-state{
  border:1px dashed rgba(53,242,224,.28);border-radius:var(--r-panel);
  min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:10px;color:var(--tx-3);font-size:15px;background:rgba(13,19,34,.6);
}
.empty-state::before{content:"";width:34px;height:34px;border-radius:50%;border:1px dashed rgba(53,242,224,.4)}

/* ============ 证据 / 引用 ============ */
.proof-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.proof-card{background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);transition:all .25s ease}
.proof-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.proof-stars{font-family:var(--mono);color:var(--c-primary);font-size:15px;letter-spacing:3px;margin-bottom:12px}
.proof-card p{font-size:14.5px;line-height:1.85;color:var(--tx-2);margin-bottom:16px}
.proof-author{display:flex;align-items:center;gap:12px}
.proof-avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(140deg,var(--c-violet),var(--c-primary));flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:#04211F}
.proof-name{font-size:14px;color:var(--tx-1);font-weight:600}
.proof-role{font-size:12.5px;color:var(--tx-3)}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px}
.faq-item{background:var(--bg-raise);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .22s ease}
.faq-item.is-open{border-color:var(--line-strong)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--tx-1);
  background:transparent;transition:background-color .2s ease;
}
.faq-q:hover{background:rgba(53,242,224,.05)}
.faq-icon{flex-shrink:0;width:22px;height:22px;position:relative}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--c-primary);border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.faq-icon::before{left:0;right:0;top:10px;height:2px}
.faq-icon::after{top:0;bottom:0;left:10px;width:2px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;background:var(--bg-strip)}
.faq-a-inner{padding:16px 20px 20px;font-size:15px;line-height:1.85;color:var(--tx-2)}

/* ============ 表单 CTA ============ */
.cta-grid{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:start}
.cta-copy h2{font-size:28px;margin-bottom:14px}
.cta-copy p{font-size:15.5px;color:var(--tx-2)}
.cta-points{display:flex;flex-direction:column;gap:14px;margin-top:24px}
.cta-points li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--tx-2)}
.cta-points li span.i{
  width:26px;height:26px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  background:rgba(53,242,224,.12);color:var(--c-primary);font-size:13px;font-weight:700;border:1px solid rgba(53,242,224,.28);
}
.form-panel{background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--r-panel);padding:30px 28px;box-shadow:var(--sh-1)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field label{font-size:14px;color:var(--tx-2)}
.field input,.field select,.field textarea{
  width:100%;min-height:46px;padding:11px 14px;font-size:16px;color:var(--tx-1);
  background:var(--bg-raise);border:1px solid var(--line);border-radius:10px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:118px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#5A6885}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(53,242,224,.16);
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--tx-3) 50%),linear-gradient(135deg,var(--tx-3) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--c-accent)}
.field-hint{font-size:13px;color:var(--c-accent);display:none}
.field.has-error .field-hint{display:block}
.form-privacy{font-size:13px;color:var(--tx-3);margin:14px 0 0;text-align:center}
.form-ok{display:none;margin-top:16px;padding:12px 16px;border-radius:10px;font-size:14px;color:#7ef4e7;background:rgba(53,242,224,.1);border:1px solid rgba(53,242,224,.3)}
.form-ok.is-show{display:block}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-strip);border-top:1px solid var(--line);position:relative;margin-top:0}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(53,242,224,.5),rgba(255,79,163,.32),transparent)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding:64px 0 40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{font-size:17px}
.footer-about{font-size:14px;line-height:1.85;color:var(--tx-3);max-width:320px}
.footer-col h4{font-size:15px;color:var(--tx-1);margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--tx-3)}
.footer-links a:hover{color:var(--c-primary)}
.footer-contact{display:flex;flex-direction:column;gap:11px;font-size:14px;color:var(--tx-3)}
.footer-contact strong{color:var(--tx-2);font-weight:500}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 30px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--tx-3);
}
.footer-bottom a{color:var(--tx-3)}
.footer-bottom a:hover{color:var(--c-primary)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .hero-grid{grid-template-columns:1fr 1fr;gap:40px}
  .compare{grid-template-columns:1fr 1fr}
  .plan-narrow{grid-column:1 / -1}
  .news-layout{grid-template-columns:7fr 5fr}
  .news-card{grid-template-columns:190px 1fr}
}
@media (max-width:991px){
  .section{padding:64px 0}
  .section-title{font-size:24px}
  .hero{padding:72px 0 56px}
  .hero h1{font-size:32px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-visual img{height:280px}
  .stairs{grid-template-columns:repeat(2,1fr);gap:16px}
  .stair-1,.stair-2,.stair-3,.stair-4{margin-top:0}
  .proof-grid{grid-template-columns:1fr 1fr}
  .cta-grid{grid-template-columns:1fr;gap:28px}
  .news-layout{grid-template-columns:1fr}
  .news-side{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 32px}
}
@media (max-width:900px){
  .main-nav{
    position:fixed;top:72px;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;margin:0;padding:16px 20px 32px;
    background:var(--bg-deep);border-top:1px solid var(--line);
    transform:translateY(-12px);opacity:0;pointer-events:none;transition:all .24s ease;
    overflow-y:auto;z-index:70;
  }
  .main-nav.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-link{height:52px;padding:0 16px;font-size:16px;border-radius:10px;border-left:3px solid transparent}
  .nav-link::after{display:none}
  .nav-link.is-active{border-left-color:var(--c-primary);box-shadow:none;background:rgba(53,242,224,.08)}
  .nav-toggle{display:flex}
  .nav-wrap{min-height:72px;justify-content:space-between}
  .nav-actions .btn-sm{display:none}
  body.nav-locked{overflow:hidden}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .section-title{font-size:22px}
  .hero{padding:52px 0 44px}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15.5px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .stats-grid{grid-template-columns:1fr 1fr;gap:16px;padding:28px 0}
  .stat-num{font-size:24px}
  .stairs{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .limit-panel{grid-template-columns:1fr;padding:28px 22px;gap:22px}
  .limit-action{align-items:stretch}
  .limit-action .btn{width:100%}
  .countdown{gap:5px}
  .cd-block{min-width:0;flex:1;padding:8px 4px}
  .cd-num{font-size:20px}
  .news-card{grid-template-columns:1fr;align-items:flex-start}
  .news-thumb{width:100%}
  .proof-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .form-panel{padding:22px 18px}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding:40px 0 28px}
  .footer-about{max-width:none}
  .cta-copy h2{font-size:22px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .status-badge .dot{animation:none}
}

/* roulang page: article */
:root{
  --c-primary:#35F2E0;
  --c-accent:#FF4FA3;
  --c-violet:#8A6BFF;
  --bg-deep:#0A0E1A;
  --bg-raise:#111726;
  --bg-elevated:#161E31;
  --bg-strip:#0D1322;
  --tx-1:#EAF2FF;
  --tx-2:#A8B6D1;
  --tx-3:#6B7A99;
  --line:rgba(53,242,224,.14);
  --line-strong:rgba(53,242,224,.42);
  --line-soft:rgba(255,255,255,.06);
  --glow-cyan:0 0 0 1px rgba(53,242,224,.35),0 0 18px rgba(53,242,224,.28);
  --glow-magenta:0 0 0 1px rgba(255,79,163,.4),0 0 20px rgba(255,79,163,.25);
  --sh-1:0 6px 20px rgba(0,0,0,.35);
  --sh-2:0 12px 32px rgba(0,0,0,.5);
  --r-card:16px;
  --r-btn:10px;
  --r-panel:20px;
  --r-img:14px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-mono:"DIN Alternate","Roboto Mono",monospace;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--tx-2);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:16px}
h1,h2,h3,h4{margin:0;color:var(--tx-1);line-height:1.35}
p{margin:0 0 1em}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,26,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent) 42%,transparent);
}
.nav-wrap{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  position:relative;flex:none;width:26px;height:26px;border-radius:8px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-violet) 58%,var(--c-accent));
  box-shadow:0 0 14px rgba(53,242,224,.45);
}
.brand-mark::after{content:"";position:absolute;inset:7px;border-radius:50%;background:var(--bg-deep)}
.brand-text{font-size:17px;font-weight:700;color:var(--tx-1);letter-spacing:.4px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;
  border-radius:10px;font-size:15px;color:var(--tx-2);
  transition:color .22s ease,background .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:6px;width:0;height:2px;border-radius:2px;
  background:var(--c-primary);transform:translateX(-50%);transition:width .22s ease;
}
.nav-link:hover{color:var(--tx-1)}
.nav-link:hover::after{width:60%}
.nav-link.is-active{color:var(--c-primary);background:rgba(53,242,224,.08);box-shadow:inset 0 -1px 0 rgba(53,242,224,.6)}
.nav-link.is-active::after{width:60%;box-shadow:0 0 10px rgba(53,242,224,.8)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  width:44px;height:44px;padding:0;border:1px solid var(--line);border-radius:10px;
  background:var(--bg-raise);cursor:pointer;transition:border-color .22s ease,background .22s ease;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--tx-1);transition:transform .22s ease,opacity .22s ease}
.nav-toggle:hover{border-color:var(--line-strong)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 28px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:all .22s ease;
}
.btn-primary{background:var(--c-primary);color:#04141a;box-shadow:0 6px 18px rgba(53,242,224,.22)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:var(--glow-cyan);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0);filter:brightness(.98)}
.btn-ghost{background:transparent;border-color:rgba(53,242,224,.5);color:var(--c-primary)}
.btn-ghost:hover{background:rgba(53,242,224,.12);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-accent{background:transparent;border-color:rgba(255,79,163,.55);color:var(--c-accent)}
.btn-accent:hover{background:rgba(255,79,163,.14);box-shadow:var(--glow-magenta);transform:translateY(-2px)}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:9px}

/* ============ Badges / Tags ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:13px;line-height:1.6;font-weight:500;
}
.badge-cyan{background:rgba(53,242,224,.12);color:var(--c-primary);border:1px solid rgba(53,242,224,.28)}
.badge-violet{background:rgba(138,107,255,.14);color:#B7A6FF;border:1px solid rgba(138,107,255,.3)}
.badge-magenta{background:rgba(255,79,163,.14);color:#FF8CC0;border:1px solid rgba(255,79,163,.32)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--c-primary);box-shadow:0 0 8px rgba(53,242,224,.9)}

/* ============ Article hero ============ */
.article-hero{
  position:relative;overflow:hidden;
  padding:44px 0 44px;
  background:
    linear-gradient(180deg,rgba(10,14,26,.86),rgba(10,14,26,.96)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.article-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(53,242,224,.16) 1px,transparent 1px);
  background-size:26px 26px;opacity:.5;
}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--tx-3);margin-bottom:20px}
.breadcrumb a{color:var(--tx-3);transition:color .2s ease}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--tx-3);opacity:.7}
.breadcrumb .current{
  color:var(--tx-2);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.article-title{
  margin:0 0 18px;font-size:34px;font-weight:700;line-height:1.3;letter-spacing:.3px;max-width:900px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13px;color:var(--tx-3)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}
.article-meta .meta-item time{font-family:var(--font-mono);letter-spacing:.5px}
.title-rule{margin-top:26px;height:1px;background:linear-gradient(90deg,var(--c-primary),rgba(53,242,224,0))}

/* ============ Article layout ============ */
.article-body{padding:48px 0 64px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:36px}
.article-main{min-width:0}
.article-cover{margin:0 0 32px}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border:1px solid var(--line);box-shadow:var(--sh-1)}
.article-cover figcaption{margin-top:10px;font-size:13px;color:var(--tx-3);text-align:center}

/* ============ Entry content ============ */
.entry-content{color:var(--tx-2);font-size:16px;line-height:1.9;text-align:left;word-break:break-word}
.entry-content p{margin:0 0 1.15em}
.entry-content h2{
  position:relative;margin:40px 0 16px;padding-left:14px;
  font-size:24px;font-weight:700;color:var(--tx-1);line-height:1.4;
}
.entry-content h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.entry-content h3{margin:28px 0 12px;font-size:18px;font-weight:600;color:var(--tx-1)}
.entry-content h4{margin:22px 0 10px;font-size:16px;font-weight:600;color:var(--tx-1)}
.entry-content ul,.entry-content ol{margin:0 0 1.15em;padding-left:0;list-style:none}
.entry-content ul li{position:relative;padding-left:20px;margin-bottom:8px}
.entry-content ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:50%;
  background:var(--c-primary);box-shadow:0 0 8px rgba(53,242,224,.7);
}
.entry-content ol{counter-reset:entry-ol}
.entry-content ol li{position:relative;padding-left:28px;margin-bottom:8px;counter-increment:entry-ol}
.entry-content ol li::before{
  content:counter(entry-ol,decimal-leading-zero);
  position:absolute;left:0;top:0;font-family:var(--font-mono);font-size:14px;color:var(--c-primary);
}
.entry-content blockquote{
  margin:24px 0;padding:16px 20px;border-left:4px solid var(--c-accent);
  background:var(--bg-strip);border-radius:0 12px 12px 0;color:var(--tx-1);font-style:normal;
}
.entry-content blockquote p:last-child{margin-bottom:0}
.entry-content img{margin:24px auto;border-radius:var(--r-img)}
.entry-content a{color:var(--c-primary);border-bottom:1px solid rgba(53,242,224,.35);transition:all .2s ease}
.entry-content a:hover{border-bottom-color:var(--c-primary);text-shadow:0 0 10px rgba(53,242,224,.45)}
.entry-content strong{color:var(--tx-1)}
.entry-content pre{
  margin:24px 0;padding:18px;background:var(--bg-deep);border:1px solid var(--line);
  border-radius:12px;overflow-x:auto;font-family:var(--font-mono);font-size:14px;line-height:1.7;color:var(--tx-1);
}
.entry-content code{
  font-family:var(--font-mono);font-size:14px;padding:2px 6px;border-radius:6px;
  background:rgba(53,242,224,.1);color:var(--c-primary);
}
.entry-content pre code{background:none;color:inherit;padding:0}
.entry-content table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.entry-content th,.entry-content td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.entry-content th{background:var(--bg-strip);color:var(--tx-1);font-weight:600}
.entry-content hr{margin:32px 0;border:0;height:1px;background:linear-gradient(90deg,var(--c-primary),transparent)}

/* ============ Empty state ============ */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  min-height:200px;padding:40px 24px;text-align:center;
  border:1px dashed rgba(53,242,224,.3);border-radius:var(--r-panel);background:var(--bg-raise);
}
.empty-state strong{color:var(--tx-1);font-size:17px}
.empty-state p{margin:0;color:var(--tx-3);font-size:14px}

/* ============ Tag list ============ */
.tag-block{margin-top:40px;padding-top:26px;border-top:1px solid var(--line-soft)}
.tag-block h3{margin:0 0 14px;font-size:15px;color:var(--tx-1);font-weight:600}
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;padding:7px 16px;border-radius:999px;font-size:13px;
  background:var(--bg-raise);border:1px solid var(--line);color:var(--tx-2);
  transition:all .22s ease;
}
.tag:hover{border-color:var(--line-strong);color:var(--c-primary);background:rgba(53,242,224,.08)}

/* ============ Post nav ============ */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:36px}
.post-nav-card{
  display:flex;flex-direction:column;gap:8px;padding:20px;
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:all .22s ease;
}
.post-nav-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.post-nav-card .label{font-size:12px;letter-spacing:1px;color:var(--c-primary);font-family:var(--font-mono)}
.post-nav-card .title{font-size:16px;font-weight:600;color:var(--tx-1);line-height:1.5}
.post-nav-card.next{align-items:flex-end;text-align:right}

/* ============ Sidebar ============ */
.article-side{display:grid;gap:20px;align-content:start}
.side-card{
  padding:22px;background:var(--bg-raise);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
}
.side-card h3{margin:0 0 14px;font-size:16px;font-weight:700;color:var(--tx-1)}
.side-card p{margin:0 0 16px;font-size:14px;line-height:1.8;color:var(--tx-3)}
.side-links{display:grid;gap:4px}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 12px;border-radius:10px;font-size:14px;color:var(--tx-2);
  border:1px solid transparent;transition:all .2s ease;
}
.side-links a::after{content:"›";color:var(--c-primary);font-size:16px;line-height:1}
.side-links a:hover{background:var(--bg-strip);border-color:var(--line);color:var(--tx-1)}
.side-status{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:12px;background:rgba(53,242,224,.07);border:1px solid var(--line);font-size:14px;color:var(--tx-1)}

/* ============ Section base ============ */
.section{padding:72px 0}
.section-alt{background:var(--bg-strip);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px}
.section-title{position:relative;margin:0;padding-left:14px;font-size:26px;font-weight:700;color:var(--tx-1)}
.section-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.section-sub{margin:10px 0 0;font-size:14px;color:var(--tx-3);line-height:1.8}
.link-more{font-size:14px;color:var(--c-primary);transition:opacity .2s ease}
.link-more:hover{opacity:.75}

/* ============ Related cards ============ */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:all .22s ease;position:relative;
}
.post-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;opacity:0;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
  transition:opacity .22s ease;
}
.post-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.post-card:hover::before{opacity:1}
.post-card .thumb{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.post-card .card-body{display:flex;flex-direction:column;gap:10px;padding:20px}
.post-card .card-title{font-size:17px;font-weight:600;color:var(--tx-1);line-height:1.5}
.post-card .card-text{margin:0;font-size:14px;color:var(--tx-3);line-height:1.8}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{background:var(--bg-raise);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .22s ease}
.faq-item.is-open{border-color:var(--line-strong)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  min-height:56px;padding:14px 20px;border:0;background:none;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--tx-1);text-align:left;line-height:1.6;
}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  border:1px solid rgba(53,242,224,.45);color:var(--c-primary);font-size:16px;line-height:1;
  transition:transform .22s ease,background .22s ease;
}
.faq-item.is-open .faq-icon{background:rgba(53,242,224,.14);transform:rotate(45deg)}
.faq-a{display:none;padding:0 20px 18px;background:var(--bg-strip);font-size:15px;color:var(--tx-2);line-height:1.85}
.faq-a p{margin:0}
.faq-item.is-open .faq-a{display:block}

/* ============ CTA ============ */
.cta-panel{
  position:relative;overflow:hidden;padding:48px;
  border-radius:var(--r-panel);border:1px solid rgba(255,79,163,.32);
  background:
    linear-gradient(120deg,rgba(22,30,49,.96),rgba(10,14,26,.96)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  box-shadow:var(--glow-magenta);
  display:grid;grid-template-columns:1.3fr 1fr;gap:32px;align-items:center;
}
.cta-panel h2{margin:0 0 14px;font-size:26px;font-weight:700;color:var(--tx-1)}
.cta-panel p{margin:0 0 18px;color:var(--tx-2);font-size:15px;line-height:1.85}
.cta-points{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.cta-points li{position:relative;padding-left:22px;font-size:14px;color:var(--tx-2)}
.cta-points li::before{
  content:"";position:absolute;left:0;top:.7em;width:7px;height:7px;border-radius:50%;
  background:var(--c-accent);box-shadow:0 0 8px rgba(255,79,163,.8);
}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start}

/* ============ Footer ============ */
.site-footer{position:relative;background:var(--bg-strip);padding:64px 0 0;margin-top:0}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-violet) 45%,transparent);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{font-size:17px;font-weight:700;color:var(--tx-1)}
.footer-about{margin:0;max-width:360px;font-size:14px;line-height:1.85;color:var(--tx-3)}
.footer-col h4{margin:0 0 16px;font-size:15px;font-weight:600;color:var(--tx-1)}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:var(--tx-2);transition:color .2s ease,transform .2s ease}
.footer-links a:hover{color:var(--c-primary)}
.footer-contact{display:grid;gap:10px;font-size:14px;color:var(--tx-3);line-height:1.75}
.footer-contact strong{color:var(--tx-2);font-weight:500}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:48px;padding:20px 0 24px;border-top:1px solid var(--line-soft);
  font-size:13px;color:var(--tx-3);
}

/* ============ Responsive ============ */
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,820px) 300px;gap:48px;justify-content:center}
  .article-side{position:sticky;top:96px}
}
@media (max-width:1199px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .cta-panel{grid-template-columns:1fr}
}
@media (max-width:991px){
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:72px;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;margin-left:0;
    padding:16px 24px 40px;background:var(--bg-deep);overflow-y:auto;z-index:55;
    transform:translateX(100%);transition:transform .28s ease;
    border-top:1px solid var(--line);
  }
  .main-nav.is-open{transform:translateX(0)}
  .nav-link{height:52px;border-radius:0;border-left:3px solid transparent;padding-left:16px;font-size:16px}
  .nav-link::after{display:none}
  .nav-link.is-active{border-left-color:var(--c-primary);background:rgba(53,242,224,.06);box-shadow:none}
  .section{padding:64px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .article-title{font-size:26px}
  .article-hero{padding:32px 0 34px}
  .related-grid{grid-template-columns:1fr}
  .post-nav{grid-template-columns:1fr}
  .post-nav-card.next{align-items:flex-start;text-align:left}
  .cta-panel{padding:32px 24px}
  .section{padding:48px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .section-title{font-size:22px}
  .entry-content h2{font-size:21px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .brand-text{font-size:15px}
  .nav-actions .btn-sm{padding:0 14px;font-size:13px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:6px}
  .btn{width:100%}
  .nav-actions .btn{width:auto}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:color .2s ease,background-color .2s ease,border-color .2s ease !important}
  html{scroll-behavior:auto}
  .post-card:hover,.post-nav-card:hover,.btn:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --c-primary:#35F2E0;
  --c-accent:#FF4FA3;
  --c-violet:#8A6BFF;
  --bg-deep:#0A0E1A;
  --bg-raise:#111726;
  --bg-elevated:#161E31;
  --bg-strip:#0D1322;
  --tx-1:#EAF2FF;
  --tx-2:#A8B6D1;
  --tx-3:#6B7A99;
  --line:rgba(53,242,224,.14);
  --line-soft:rgba(255,255,255,.06);
  --line-strong:rgba(53,242,224,.42);
  --glow-cyan:0 0 0 1px rgba(53,242,224,.35),0 0 18px rgba(53,242,224,.28);
  --glow-magenta:0 0 0 1px rgba(255,79,163,.4),0 0 20px rgba(255,79,163,.25);
  --sh-1:0 6px 20px rgba(0,0,0,.35);
  --sh-2:0 12px 32px rgba(0,0,0,.5);
  --r-card:16px;
  --r-btn:10px;
  --r-panel:20px;
  --r-img:14px;
  --header-h:68px;
  --mono:"DIN Alternate","Roboto Mono","SFMono-Regular",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--tx-2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:0;
  overflow-x:hidden;
}
body.nav-open{overflow:hidden;}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .22s ease,opacity .22s ease;}
a:hover{color:var(--tx-1);}
h1,h2,h3,h4{margin:0;color:var(--tx-1);font-weight:700;}
h1{font-size:40px;line-height:1.25;}
h2{font-size:28px;line-height:1.3;}
h3{font-size:18px;line-height:1.45;font-weight:600;}
h4{font-size:15px;line-height:1.5;font-weight:600;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:16px;color:inherit;}
button{cursor:pointer;background:none;border:0;padding:0;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
::selection{background:rgba(53,242,224,.28);color:#04121a;}

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

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  padding:12px 28px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;
  transition:all .22s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#04161a;}
.btn-primary:hover{color:#04161a;transform:translateY(-2px);box-shadow:var(--glow-cyan);filter:brightness(1.06);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border-color:rgba(53,242,224,.5);color:var(--c-primary);}
.btn-ghost:hover{background:rgba(53,242,224,.12);color:var(--tx-1);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-accent{background:transparent;border-color:rgba(255,79,163,.55);color:var(--c-accent);}
.btn-accent:hover{background:rgba(255,79,163,.14);color:#ffd8ea;box-shadow:var(--glow-magenta);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:13px;line-height:1.6;font-weight:500;
}
.badge-cyan{background:rgba(53,242,224,.12);color:var(--c-primary);border:1px solid rgba(53,242,224,.28);}
.badge-violet{background:rgba(138,107,255,.14);color:#bfaeff;border:1px solid rgba(138,107,255,.3);}
.badge-magenta{background:rgba(255,79,163,.13);color:#ff9dc6;border:1px solid rgba(255,79,163,.3);}
.dot-pulse{
  width:8px;height:8px;border-radius:50%;background:var(--c-primary);
  box-shadow:0 0 0 0 rgba(53,242,224,.55);
  animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(53,242,224,.5);}
  70%{box-shadow:0 0 0 10px rgba(53,242,224,0);}
  100%{box-shadow:0 0 0 0 rgba(53,242,224,0);}
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,26,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,rgba(53,242,224,.75),rgba(255,79,163,.55) 45%,rgba(10,14,26,0));
  pointer-events:none;
}
.nav-wrap{display:flex;align-items:center;gap:28px;height:var(--header-h);}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--tx-1);font-weight:700;font-size:17px;letter-spacing:.2px;}
.brand:hover{color:var(--tx-1);}
.brand-mark{
  width:24px;height:24px;border-radius:8px;flex:0 0 auto;
  background:
    radial-gradient(circle at 30% 30%,rgba(255,255,255,.9),rgba(255,255,255,0) 42%),
    linear-gradient(135deg,var(--c-primary),var(--c-violet) 55%,var(--c-accent));
  box-shadow:0 0 14px rgba(53,242,224,.45);
}
.brand-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:12px;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:38px;padding:0 14px;border-radius:9px;
  color:var(--tx-2);font-size:15px;font-weight:500;
  transition:all .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:4px;width:0;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:translateX(-50%);
  transition:width .22s ease;
}
.nav-link:hover{color:var(--tx-1);background:rgba(255,255,255,.03);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{
  color:var(--c-primary);
  background:rgba(53,242,224,.08);
  box-shadow:inset 0 -2px 0 rgba(53,242,224,.65),0 0 12px rgba(53,242,224,.18);
}
.nav-link.is-active::after{width:60%;}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:rgba(255,255,255,.02);
}
.nav-toggle span{display:block;width:18px;height:2px;margin:0 auto;background:var(--tx-1);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 栏目头 ---------- */
.page-banner{
  position:relative;
  padding:56px 0 52px;
  background:
    linear-gradient(180deg,rgba(10,14,26,.72),rgba(10,14,26,.94) 62%,var(--bg-deep)),
    url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(234,242,255,.16) 1px,transparent 1px),radial-gradient(rgba(53,242,224,.14) 1px,transparent 1px);
  background-size:120px 120px,180px 180px;
  background-position:0 0,60px 70px;
  opacity:.6;pointer-events:none;
}
.page-banner::after{
  content:"";position:absolute;right:-120px;bottom:-160px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(53,242,224,.22),rgba(53,242,224,0) 68%);
  pointer-events:none;
}
.page-banner .container{position:relative;z-index:2;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--tx-3);margin-bottom:20px;flex-wrap:wrap;}
.crumbs a{color:var(--tx-3);}
.crumbs a:hover{color:var(--c-primary);}
.crumbs .sep{color:rgba(107,122,153,.7);}
.crumbs .current{color:var(--tx-2);}
.banner-head{display:flex;flex-wrap:wrap;gap:14px 18px;align-items:center;margin-bottom:16px;}
.banner-lead{max-width:760px;font-size:17px;line-height:1.9;color:var(--tx-2);margin:0 0 26px;}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section-alt{background:var(--bg-strip);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}
.section-head{margin-bottom:28px;max-width:820px;}
.section-head .badge{margin-bottom:14px;}
.section-head p{color:var(--tx-2);margin:12px 0 0;}
.h-line{position:relative;padding-left:16px;}
.h-line::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.section-title-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px;}
.text-link{font-size:14px;font-weight:600;color:var(--c-primary);}
.text-link:hover{text-decoration:underline;}

/* ---------- 指标条 ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border:1px solid var(--line);border-radius:var(--r-panel);
  background:linear-gradient(180deg,rgba(17,23,38,.9),rgba(13,19,34,.75));
  overflow:hidden;
}
.metric{padding:26px 24px;border-right:1px solid var(--line-soft);}
.metric:last-child{border-right:0;}
.metric-value{font-family:var(--mono);font-size:30px;font-weight:700;color:var(--c-primary);line-height:1.2;letter-spacing:.5px;}
.metric-value small{font-size:15px;margin-left:2px;color:rgba(53,242,224,.75);}
.metric-label{font-size:13px;color:var(--tx-3);margin-top:6px;line-height:1.6;}

/* ---------- 图文左右交替 ---------- */
.feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:34px 0;
  border-bottom:1px solid var(--line-soft);
}
.feature-row:last-child{border-bottom:0;padding-bottom:0;}
.feature-row:first-child{padding-top:0;}
.feature-row.reverse .feature-media{order:2;}
.feature-media{position:relative;border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh-1);border:1px solid var(--line-soft);}
.feature-media img{width:100%;height:300px;object-fit:cover;transition:transform .5s ease;}
.feature-media:hover img{transform:scale(1.03);}
.feature-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,14,26,0) 45%,rgba(10,14,26,.72));
  pointer-events:none;
}
.feature-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
  font-family:var(--mono);font-size:13px;letter-spacing:1px;color:var(--c-primary);
}
.feature-body h2{margin-bottom:14px;}
.feature-body p{color:var(--tx-2);}
.rule-list{margin-top:18px;display:grid;gap:10px;}
.rule-list li{
  position:relative;padding-left:22px;font-size:15px;color:var(--tx-2);line-height:1.8;
}
.rule-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:9px;height:9px;border-radius:3px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-violet));
}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
.step{
  position:relative;
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 22px 22px;box-shadow:var(--sh-1);transition:all .25s ease;
}
.step:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2);}
.step-num{
  font-family:var(--mono);font-size:14px;letter-spacing:2px;color:var(--c-primary);
  display:block;margin-bottom:14px;
}
.step h3{margin-bottom:10px;}
.step p{font-size:14px;color:var(--tx-2);margin:0;}

/* ---------- 对比面板 ---------- */
.compare{
  border:1px solid var(--line);border-radius:var(--r-panel);overflow:hidden;background:var(--bg-raise);
}
.compare-head{
  display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:0;
  background:rgba(53,242,224,.06);
  border-bottom:1px solid var(--line);
}
.compare-head span{padding:16px 22px;font-size:14px;font-weight:600;color:var(--tx-1);}
.compare-head span:first-child{color:var(--tx-3);font-weight:500;}
.compare-row{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:0;border-bottom:1px solid var(--line-soft);}
.compare-row:nth-child(even){background:var(--bg-strip);}
.compare-row:last-child{border-bottom:0;}
.compare-row > div{padding:16px 22px;font-size:14.5px;color:var(--tx-2);}
.compare-row > div:first-child{color:var(--tx-3);font-size:14px;}
.compare-row .is-best{color:var(--c-primary);font-weight:600;}
.compare-row .is-plain{color:var(--tx-3);}

/* ---------- 场景卡片 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.scene-card{
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);position:relative;overflow:hidden;
  transition:all .25s ease;
}
.scene-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent),transparent);
  opacity:0;transition:opacity .25s ease;
}
.scene-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2);}
.scene-card:hover::before{opacity:1;}
.scene-card .badge{margin-bottom:14px;}
.scene-card h3{margin-bottom:10px;}
.scene-card p{font-size:14.5px;margin:0;color:var(--tx-2);}

/* ---------- 状态条目列表 ---------- */
.status-list{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--bg-raise);}
.status-item{
  display:flex;align-items:center;gap:16px;padding:18px 22px;
  border-bottom:1px solid var(--line-soft);transition:background .22s ease;
}
.status-item:last-child{border-bottom:0;}
.status-item:hover{background:rgba(53,242,224,.05);}
.status-item .ti{font-family:var(--mono);font-size:13px;color:var(--tx-3);min-width:96px;}
.status-item .tc{flex:1;font-size:15px;color:var(--tx-1);}
.status-item .ts{font-size:13px;color:var(--tx-3);font-family:var(--mono);}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;}
.faq-item{border:1px solid var(--line);border-radius:12px;background:var(--bg-raise);overflow:hidden;transition:border-color .22s ease;}
.faq-item.is-open{border-color:var(--line-strong);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 22px;text-align:left;
  color:var(--tx-1);font-size:16px;font-weight:600;
}
.faq-q:hover{color:var(--c-primary);}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 auto;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .25s ease,opacity .25s ease;
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item.is-open .faq-a{max-height:420px;}
.faq-a-inner{padding:0 22px 20px;font-size:15px;color:var(--tx-2);background:var(--bg-strip);}
.faq-a-inner p{margin:0;padding-top:14px;}

/* ---------- 表单 CTA ---------- */
.cta-panel{
  display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:start;
  background:linear-gradient(140deg,rgba(22,30,49,.95),rgba(13,19,34,.92));
  border:1px solid var(--line);border-radius:var(--r-panel);
  padding:44px;box-shadow:var(--sh-1);
}
.cta-points{margin-top:22px;display:grid;gap:12px;}
.cta-points li{position:relative;padding-left:26px;font-size:15px;color:var(--tx-2);}
.cta-points li::before{
  content:"";position:absolute;left:0;top:.55em;width:10px;height:10px;border-radius:50%;
  background:radial-gradient(circle,var(--c-primary),rgba(53,242,224,.15));
  box-shadow:0 0 10px rgba(53,242,224,.5);
}
.form-panel{background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--r-panel);padding:26px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field-full{grid-column:1/-1;}
.field label{font-size:14px;color:var(--tx-2);}
.field input,.field select,.field textarea{
  width:100%;min-height:46px;padding:11px 14px;
  background:var(--bg-raise);border:1px solid var(--line);border-radius:10px;
  color:var(--tx-1);transition:border-color .22s ease,box-shadow .22s ease;
}
.field textarea{min-height:110px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:rgba(107,122,153,.8);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(53,242,224,.16);
}
.form-note{font-size:13px;color:var(--tx-3);margin:14px 0 0;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:0;padding:64px 0 28px;
  background:linear-gradient(180deg,var(--bg-deep),#070A13);
  border-top:1px solid var(--line-soft);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,rgba(53,242,224,.7),rgba(255,79,163,.45) 50%,rgba(10,14,26,0));
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--tx-1);font-weight:700;font-size:17px;margin-bottom:16px;}
.footer-about{font-size:14px;color:var(--tx-3);line-height:1.85;max-width:340px;margin:0;}
.footer-col h4{color:var(--tx-1);margin-bottom:16px;font-size:15px;}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:14px;color:var(--tx-2);}
.footer-links a:hover{color:var(--c-primary);}
.footer-contact{display:grid;gap:10px;font-size:14px;color:var(--tx-3);}
.footer-contact strong{color:var(--tx-2);font-weight:600;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  margin-top:44px;padding-top:20px;font-size:13px;color:var(--tx-3);
  border-top:1px solid var(--line-soft);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  h1{font-size:34px;}
  .section{padding:72px 0;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .metric:nth-child(2){border-right:0;}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line-soft);}
  .steps{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991px){
  .nav-wrap{gap:16px;}
  .main-nav{
    position:fixed;left:0;right:0;top:var(--header-h);bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:16px 24px 40px;
    background:var(--bg-deep);
    border-top:1px solid var(--line);
    transform:translateX(100%);
    transition:transform .3s ease;
    overflow-y:auto;z-index:55;
  }
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{
    height:52px;padding:0 14px;border-radius:0;
    border-bottom:1px solid var(--line-soft);
    font-size:16px;justify-content:flex-start;
  }
  .nav-link::after{display:none;}
  .nav-link.is-active{box-shadow:none;border-left:3px solid var(--c-primary);background:rgba(53,242,224,.08);}
  .nav-toggle{display:flex;}
  .nav-actions .btn-sm{padding:8px 14px;font-size:13.5px;}
  .feature-row{grid-template-columns:1fr;gap:24px;}
  .feature-row.reverse .feature-media{order:0;}
  .feature-media img{height:250px;}
  .compare-head,.compare-row{grid-template-columns:1.1fr 1fr 1fr;}
  .compare-head span,.compare-row > div{padding:14px 16px;font-size:13.5px;}
  .cta-panel{grid-template-columns:1fr;gap:28px;padding:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  .page-banner{padding:36px 0 40px;}
  .banner-lead{font-size:15.5px;}
  .banner-actions{gap:12px;}
  .banner-actions .btn{width:100%;}
  .feature-media img{height:200px;}
  .scene-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .metrics{grid-template-columns:1fr 1fr;}
  .metric{padding:20px 18px;}
  .metric-value{font-size:24px;}
  .status-item{flex-wrap:wrap;gap:6px 12px;}
  .status-item .ti{min-width:auto;}
  .status-item .tc{flex:1 1 100%;order:3;}
  .form-grid{grid-template-columns:1fr;}
  .form-panel{padding:20px;}
  .cta-panel{padding:22px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .compare-head{display:none;}
  .compare-row{grid-template-columns:1fr;}
  .compare-row > div{padding:10px 16px;}
  .compare-row > div:first-child{padding-top:16px;font-weight:600;color:var(--c-primary);}
  .compare-row > div:last-child{padding-bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .scene-card:hover,.step:hover,.btn-primary:hover,.btn-ghost:hover{transform:none;}
}

/* roulang page: category2 */
:root{
  --c-primary:#35F2E0;
  --c-accent:#FF4FA3;
  --c-violet:#8A6BFF;
  --bg-deep:#0A0E1A;
  --bg-raise:#111726;
  --bg-elevated:#161E31;
  --bg-strip:#0D1322;
  --tx-1:#EAF2FF;
  --tx-2:#A8B6D1;
  --tx-3:#6B7A99;
  --line:rgba(53,242,224,.14);
  --line-strong:rgba(53,242,224,.42);
  --glow-cyan:0 0 0 1px rgba(53,242,224,.35),0 0 18px rgba(53,242,224,.28);
  --glow-magenta:0 0 0 1px rgba(255,79,163,.4),0 0 20px rgba(255,79,163,.25);
  --sh-1:0 6px 20px rgba(0,0,0,.35);
  --sh-2:0 12px 32px rgba(0,0,0,.5);
  --r-card:16px;
  --r-btn:10px;
  --r-panel:20px;
  --r-img:14px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,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:16px;
  line-height:1.85;
  color:var(--tx-2);
  background:var(--bg-deep);
  background-image:radial-gradient(rgba(53,242,224,.07) 1px,transparent 1px);
  background-size:36px 36px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--c-primary);text-decoration:none;transition:color .22s ease,opacity .22s ease;}
a:hover{color:#7df8ec;}
h1,h2,h3,h4{color:var(--tx-1);margin:0;line-height:1.35;font-weight:700;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:16px;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,26,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent) 45%,rgba(138,107,255,0) 100%);
  opacity:.85;
}
.nav-wrap{display:flex;align-items:center;gap:28px;min-height:70px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  width:16px;height:16px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#fff,var(--c-primary) 45%,rgba(53,242,224,.15) 75%);
  box-shadow:0 0 10px rgba(53,242,224,.7);
  flex:none;
}
.brand-text{color:var(--tx-1);font-size:17px;font-weight:700;letter-spacing:.5px;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:38px;padding:0 14px;border-radius:9px;
  color:var(--tx-2);font-size:15px;font-weight:500;
  transition:color .22s ease,background .22s ease,box-shadow .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:20%;right:20%;bottom:4px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:center;transition:transform .22s ease;
}
.nav-link:hover{color:var(--tx-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{
  color:var(--c-primary);
  background:rgba(53,242,224,.08);
  box-shadow:inset 0 -2px 0 rgba(53,242,224,.55),0 6px 18px rgba(53,242,224,.18);
}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;flex:none;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 28px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:all .22s ease;text-align:center;
}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-primary{background:var(--c-primary);color:#04121a;}
.btn-primary:hover{color:#04121a;filter:brightness(1.08);box-shadow:var(--glow-cyan);transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:rgba(53,242,224,.5);}
.btn-ghost:hover{background:rgba(53,242,224,.12);color:#7df8ec;transform:translateY(-2px);}
.btn-accent{background:transparent;color:var(--c-accent);border-color:rgba(255,79,163,.55);}
.btn-accent:hover{background:rgba(255,79,163,.14);color:#ff8dc0;box-shadow:var(--glow-magenta);}
.btn-block{width:100%;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  background:rgba(53,242,224,.08);border:1px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-primary);border-radius:2px;transition:transform .22s ease,opacity .22s ease;}

/* ---------- 栏目头 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  min-height:260px;display:flex;align-items:center;
  padding:52px 0 46px;
  background-image:linear-gradient(90deg,rgba(10,14,26,.94) 8%,rgba(10,14,26,.72) 52%,rgba(10,14,26,.9) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;right:-120px;bottom:-140px;width:420px;height:420px;
  border-radius:50%;background:radial-gradient(circle,rgba(53,242,224,.22),transparent 68%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:760px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--tx-3);margin-bottom:14px;}
.breadcrumb a{color:var(--tx-3);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{opacity:.6;}
.breadcrumb .cur{color:var(--tx-2);}
.page-hero h1{font-size:38px;line-height:1.25;letter-spacing:0;margin-bottom:14px;}
.page-hero h1 .hl{color:var(--c-primary);}
.hero-desc{font-size:15.5px;line-height:1.85;color:var(--tx-2);max-width:700px;margin:0;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;font-size:13px;font-weight:500;line-height:1.6;
  border:1px solid transparent;
}
.badge-cyan{background:rgba(53,242,224,.12);color:var(--c-primary);border-color:rgba(53,242,224,.28);}
.badge-violet{background:rgba(138,107,255,.14);color:#b3a1ff;border-color:rgba(138,107,255,.3);}
.badge-magenta{background:rgba(255,79,163,.12);color:#ff8dc0;border-color:rgba(255,79,163,.32);}

/* ---------- 指标条 ---------- */
.stat-strip{padding:34px 0;background:var(--bg-strip);border-bottom:1px solid var(--line);}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.stat-item{padding:6px 4px;}
.stat-num{
  font-family:var(--font-num);font-size:30px;font-weight:700;color:var(--c-primary);
  letter-spacing:1px;line-height:1.2;
}
.stat-num small{font-size:15px;margin-left:3px;color:var(--tx-2);font-family:var(--font);font-weight:500;}
.stat-label{font-size:13px;color:var(--tx-3);margin-top:6px;}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section-strip{background:var(--bg-strip);}
.section-head{margin-bottom:34px;max-width:820px;}
.section-title{
  font-size:28px;line-height:1.3;padding-left:16px;position:relative;
}
.section-title::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:3px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.section-sub{margin-top:12px;font-size:15px;color:var(--tx-2);}
.divider-line{height:1px;background:linear-gradient(90deg,rgba(53,242,224,.5),rgba(53,242,224,0));border:0;margin:0;}

/* ---------- 布局：主栏 + 粘性侧栏 ---------- */
.layout{display:grid;grid-template-columns:7fr 5fr;gap:38px;align-items:start;}

/* ---------- 编号章节 ---------- */
.chapter{
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-panel);
  padding:26px 26px 22px;margin-bottom:22px;box-shadow:var(--sh-1);
  transition:border-color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.chapter:hover{border-color:var(--line-strong);box-shadow:var(--sh-2);transform:translateY(-3px);}
.chapter-top{display:flex;align-items:center;gap:14px;margin-bottom:14px;}
.chapter-num{
  font-family:var(--font-num);font-size:14px;font-weight:700;color:var(--c-primary);
  border:1px solid rgba(53,242,224,.4);border-radius:999px;padding:3px 12px;flex:none;
  letter-spacing:1px;
}
.chapter h3{font-size:19px;}
.chapter p{font-size:15px;margin-bottom:.8em;}
.chapter p:last-child{margin-bottom:0;}
.check-list li{
  position:relative;padding:8px 0 8px 26px;font-size:15px;color:var(--tx-2);
  border-bottom:1px dashed rgba(255,255,255,.06);
}
.check-list li:last-child{border-bottom:0;}
.check-list li::before{
  content:"";position:absolute;left:6px;top:18px;width:7px;height:7px;border-radius:2px;
  background:var(--c-primary);box-shadow:0 0 8px rgba(53,242,224,.6);
}
.check-list li strong{color:var(--tx-1);font-weight:600;}

/* ---------- 粘性侧栏 ---------- */
.side-col{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px;}
.side-card{
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);
}
.side-card h4{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h4 i{color:var(--c-primary);font-size:14px;}
.side-nav a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 12px;border-radius:10px;color:var(--tx-2);font-size:15px;
  border:1px solid transparent;transition:all .22s ease;
}
.side-nav a i{font-size:12px;color:var(--tx-3);transition:color .22s ease,transform .22s ease;}
.side-nav a:hover{background:rgba(53,242,224,.07);border-color:var(--line);color:var(--tx-1);}
.side-nav a:hover i{color:var(--c-primary);transform:translateX(3px);}
.side-nav a.is-current{color:var(--c-primary);background:rgba(53,242,224,.08);border-color:var(--line-strong);}
.side-note{
  background:linear-gradient(160deg,rgba(255,79,163,.14),rgba(17,23,38,.9));
  border:1px solid rgba(255,79,163,.35);
  border-radius:var(--r-card);padding:20px;box-shadow:var(--glow-magenta);
}
.side-note h4{color:#ffd0e5;font-size:16px;margin-bottom:10px;}
.side-note p{font-size:14px;color:var(--tx-2);margin-bottom:16px;}

/* ---------- 两列卡片网格 ---------- */
.card-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.panel-card{
  position:relative;overflow:hidden;
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.panel-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
  opacity:0;transition:opacity .22s ease;
}
.panel-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2);}
.panel-card:hover::before{opacity:1;}
.panel-icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(53,242,224,.1);border:1px solid var(--line);color:var(--c-primary);
  font-size:18px;margin-bottom:16px;
}
.panel-card h3{font-size:18px;margin-bottom:10px;}
.panel-card p{font-size:15px;color:var(--tx-2);margin-bottom:14px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}

/* ---------- 图文块 ---------- */
.media-row{
  display:grid;grid-template-columns:6fr 6fr;gap:30px;align-items:center;
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-panel);
  padding:26px;box-shadow:var(--sh-1);
}
.media-row + .media-row{margin-top:22px;}
.media-row.reverse .media-text{order:2;}
.media-row.reverse .media-pic{order:1;}
.media-pic img{width:100%;height:260px;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--line);}
.media-text h3{font-size:19px;margin-bottom:12px;}
.media-text p{font-size:15px;margin-bottom:12px;}

/* ---------- 时间线 ---------- */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;}
.tl-item{
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 20px;box-shadow:var(--sh-1);position:relative;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.tl-item:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2);}
.tl-step{
  font-family:var(--font-num);font-size:13px;color:var(--c-primary);letter-spacing:1px;
  display:inline-block;margin-bottom:10px;
}
.tl-item h3{font-size:17px;margin-bottom:8px;}
.tl-item p{font-size:14px;color:var(--tx-2);margin:0;}

/* ---------- 自检指标卡 ---------- */
.score-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.score-card{
  background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-1);
}
.score-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:12px;}
.score-head h3{font-size:16px;}
.score-val{font-family:var(--font-num);font-size:24px;color:var(--c-accent);font-weight:700;}
.score-bar{height:8px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden;margin-bottom:12px;}
.score-bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--c-violet),var(--c-primary));}
.score-card p{font-size:14px;margin:0;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--bg-raise);border:1px solid var(--line);border-radius:12px;overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item.open{border-color:var(--line-strong);box-shadow:var(--glow-cyan);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;background:transparent;border:0;cursor:pointer;
  color:var(--tx-1);font-size:16px;font-weight:600;text-align:left;
}
.faq-q .sign{color:var(--c-primary);font-size:18px;flex:none;transition:transform .22s ease;}
.faq-item.open .faq-q .sign{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;background:var(--bg-strip);}
.faq-a p{margin:0;padding:16px 20px;font-size:15px;color:var(--tx-2);}

/* ---------- CTA / 表单 ---------- */
.cta-panel{
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--r-panel);
  padding:34px;box-shadow:var(--sh-1);
}
.cta-grid{display:grid;grid-template-columns:5fr 7fr;gap:34px;align-items:start;}
.cta-grid h2{font-size:26px;margin-bottom:14px;padding-left:16px;position:relative;}
.cta-grid h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:3px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.point-list li{display:flex;gap:12px;padding:10px 0;font-size:15px;color:var(--tx-2);}
.point-list i{color:var(--c-primary);margin-top:6px;font-size:14px;}
.form-panel{background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--r-panel);padding:26px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:14px;color:var(--tx-2);margin-bottom:8px;}
.field .control{
  width:100%;height:46px;padding:0 14px;border-radius:10px;
  background:var(--bg-raise);border:1px solid var(--line);color:var(--tx-1);
  transition:border-color .22s ease,box-shadow .22s ease;
}
.field textarea.control{height:110px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field .control::placeholder{color:var(--tx-3);}
.field .control:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(53,242,224,.16);}
.form-tip{font-size:13px;color:var(--tx-3);margin:14px 0 0;}
.form-msg{display:none;font-size:14px;color:var(--c-primary);margin-top:12px;}
.form-msg.show{display:block;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-strip);border-top:1px solid var(--line);
  padding:56px 0 0;margin-top:20px;position:relative;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(53,242,224,.6),rgba(255,79,163,.35) 50%,rgba(53,242,224,0));
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:30px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-about{font-size:14px;color:var(--tx-3);line-height:1.8;margin:0;max-width:340px;}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--tx-1);}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:var(--tx-3);font-size:14px;}
.footer-links a:hover{color:var(--c-primary);}
.footer-contact{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--tx-3);}
.footer-contact strong{color:var(--tx-2);font-weight:600;}
.footer-bottom{
  margin-top:40px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--tx-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .layout{grid-template-columns:1fr;}
  .side-col{position:static;}
  .card-grid-2{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991px){
  .nav-wrap{min-height:64px;gap:18px;}
  .main-nav{
    position:fixed;inset:64px 0 0 0;flex-direction:column;align-items:stretch;
    gap:0;background:var(--bg-deep);padding:18px 20px;margin:0;
    transform:translateX(-100%);transition:transform .28s ease;overflow-y:auto;z-index:55;
  }
  .main-nav.open{transform:translateX(0);}
  .nav-link{height:52px;padding:0 14px;font-size:16px;border-radius:8px;}
  .nav-link::after{display:none;}
  .nav-link.is-active{box-shadow:inset 3px 0 0 var(--c-primary);background:rgba(53,242,224,.08);}
  .nav-toggle{display:flex;}
  .section{padding:64px 0;}
  .page-hero{min-height:220px;padding:42px 0 38px;}
  .page-hero h1{font-size:30px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:22px;}
  .timeline{grid-template-columns:repeat(2,1fr);}
  .score-grid{grid-template-columns:repeat(2,1fr);}
  .cta-grid{grid-template-columns:1fr;gap:24px;}
  .media-row{grid-template-columns:1fr;padding:22px;}
  .media-row.reverse .media-text{order:1;}
  .media-row.reverse .media-pic{order:2;}
  .media-pic img{height:220px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  body{font-size:15.5px;}
  .container{padding:0 16px;}
  .brand-text{font-size:15px;}
  .section{padding:48px 0;}
  .section-title{font-size:22px;}
  .page-hero h1{font-size:26px;}
  .card-grid-2{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;}
  .score-grid{grid-template-columns:1fr;}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:18px;}
  .stat-num{font-size:24px;}
  .cta-panel{padding:22px;}
  .form-panel{padding:20px;}
  .btn{width:100%;padding:13px 22px;}
  .btn-sm{width:auto;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
  .panel-card:hover,.chapter:hover,.tl-item:hover,.btn:hover{transform:none;}
}

/* roulang page: category3 */
:root{
  --c-primary:#35F2E0;
  --c-accent:#FF4FA3;
  --c-violet:#8A6BFF;
  --bg-deep:#0A0E1A;
  --bg-raise:#111726;
  --bg-elevated:#161E31;
  --bg-strip:#0D1322;
  --tx-1:#EAF2FF;
  --tx-2:#A8B6D1;
  --tx-3:#6B7A99;
  --line:rgba(53,242,224,.14);
  --line-strong:rgba(53,242,224,.42);
  --glow-cyan:0 0 0 1px rgba(53,242,224,.35),0 0 18px rgba(53,242,224,.28);
  --glow-magenta:0 0 0 1px rgba(255,79,163,.4),0 0 20px rgba(255,79,163,.25);
  --sh-1:0 6px 20px rgba(0,0,0,.35);
  --sh-2:0 12px 32px rgba(0,0,0,.5);
  --r-card:16px;
  --r-btn:10px;
  --r-panel:20px;
  --r-img:14px;
  --container:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"DIN Alternate","Roboto Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--tx-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  text-align:left;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--c-primary);text-decoration:none;transition:color .22s ease,opacity .22s ease;}
a:hover{color:#7CF8EC;}
h1,h2,h3,h4{margin:0;color:var(--tx-1);font-weight:700;line-height:1.35;}
h1{font-size:40px;line-height:1.25;}
h2{font-size:28px;line-height:1.3;}
h3{font-size:18px;font-weight:600;line-height:1.45;}
h4{font-size:15px;font-weight:600;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:4px;}

.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;position:relative;}
.section-alt{background:var(--bg-strip);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;flex-wrap:wrap;}
.section-title{position:relative;padding-left:16px;}
.section-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.section-sub{color:var(--tx-2);font-size:15px;margin-top:10px;max-width:720px;}
.link-more{font-size:14px;color:var(--c-primary);white-space:nowrap;}
.link-more::after{content:"›";margin-left:6px;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,26,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent) 45%,transparent);
  opacity:.75;
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:70px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--tx-1);font-weight:700;font-size:17px;letter-spacing:.3px;}
.brand:hover{color:var(--tx-1);}
.brand-mark{
  width:26px;height:26px;border-radius:50%;flex:0 0 26px;
  background:radial-gradient(circle at 32% 30%,#35F2E0 0%,#8A6BFF 58%,rgba(10,14,26,0) 74%);
  box-shadow:0 0 14px rgba(53,242,224,.5);
}
.brand-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  color:var(--tx-2);font-size:15px;border-radius:8px;transition:all .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:20%;right:20%;bottom:4px;height:2px;border-radius:2px;
  background:var(--c-primary);opacity:0;transform:scaleX(.4);transition:all .22s ease;
}
.nav-link:hover{color:var(--tx-1);background:rgba(53,242,224,.06);}
.nav-link:hover::after{opacity:.7;transform:scaleX(1);}
.nav-link.is-active{
  color:var(--c-primary);background:rgba(53,242,224,.08);
  box-shadow:0 2px 0 0 rgba(53,242,224,.45),0 0 16px rgba(53,242,224,.18);
}
.nav-link.is-active::after{opacity:1;transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:var(--bg-raise);
  border-radius:10px;cursor:pointer;padding:0;position:relative;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:var(--tx-1);
  transition:all .25s ease;
}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
.nav-open .nav-toggle span:nth-child(1){top:21px;transform:rotate(45deg);}
.nav-open .nav-toggle span:nth-child(2){opacity:0;}
.nav-open .nav-toggle span:nth-child(3){top:21px;transform:rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 28px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:all .22s ease;
}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-primary{background:var(--c-primary);color:#04121A;border-color:var(--c-primary);}
.btn-primary:hover{color:#04121A;transform:translateY(-2px);box-shadow:var(--glow-cyan);filter:brightness(1.06);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:rgba(53,242,224,.55);}
.btn-ghost:hover{background:rgba(53,242,224,.12);color:var(--c-primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-accent{background:transparent;color:var(--c-accent);border-color:rgba(255,79,163,.6);}
.btn-accent:hover{background:rgba(255,79,163,.14);color:var(--c-accent);box-shadow:var(--glow-magenta);transform:translateY(-2px);}

/* ---------- 栏目头 ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.page-hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  filter:saturate(.9);
}
.page-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 78% 82%,rgba(53,242,224,.22),transparent 46%),
    radial-gradient(rgba(53,242,224,.14) 1px,transparent 1px) 0 0/58px 58px,
    linear-gradient(180deg,rgba(10,14,26,.72) 0%,rgba(10,14,26,.94) 78%,var(--bg-deep) 100%);
}
.page-hero-inner{position:relative;z-index:2;padding:56px 0 48px;max-width:840px;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--tx-3);margin-bottom:18px;flex-wrap:wrap;}
.crumb a{color:var(--tx-3);}
.crumb a:hover{color:var(--c-primary);}
.crumb-sep{color:var(--tx-3);}
.crumb-now{color:var(--tx-2);}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:5px 14px;border-radius:999px;
  font-size:13px;color:var(--c-primary);background:rgba(53,242,224,.1);
  border:1px solid rgba(53,242,224,.3);margin-bottom:18px;
}
.hero-tag::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--c-primary);
  box-shadow:0 0 10px rgba(53,242,224,.9);animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}
.page-hero h1{margin-bottom:16px;}
.page-hero h1 span{color:var(--c-primary);}
.page-hero-desc{color:var(--tx-2);font-size:16px;max-width:760px;margin:0;}

/* ---------- 数据条 ---------- */
.stat-strip{
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(17,23,38,.85),rgba(13,19,34,.6));
}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);}
.stat-item{background:var(--bg-deep);padding:26px 22px;}
.stat-num{
  font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--c-primary);
  letter-spacing:.5px;line-height:1.2;
}
.stat-label{font-size:13px;color:var(--tx-3);margin-top:6px;}

/* ---------- 分类卡片 ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.topic-card{
  display:flex;gap:18px;padding:20px;border-radius:var(--r-card);
  background:var(--bg-raise);border:1px solid var(--line);box-shadow:var(--sh-1);
  transition:all .25s ease;position:relative;overflow:hidden;
}
.topic-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent),transparent);
  opacity:0;transition:opacity .25s ease;
}
.topic-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2);}
.topic-card:hover::before{opacity:1;}
.topic-thumb{width:132px;flex:0 0 132px;border-radius:var(--r-img);overflow:hidden;position:relative;background:var(--bg-strip);}
.topic-thumb img{width:100%;height:100%;object-fit:cover;border-radius:var(--r-img);transition:transform .4s ease;}
.topic-card:hover .topic-thumb img{transform:scale(1.05);}
.topic-body{flex:1;min-width:0;}
.topic-body h3{margin-bottom:8px;}
.topic-body p{font-size:14px;color:var(--tx-2);margin-bottom:12px;}
.badge{
  display:inline-flex;align-items:center;padding:3px 11px;border-radius:999px;
  font-size:12.5px;line-height:1.6;letter-spacing:.2px;
}
.badge-cyan{color:var(--c-primary);background:rgba(53,242,224,.1);border:1px solid rgba(53,242,224,.28);}
.badge-violet{color:#B9A6FF;background:rgba(138,107,255,.12);border:1px solid rgba(138,107,255,.3);}
.badge-magenta{color:var(--c-accent);background:rgba(255,79,163,.12);border:1px solid rgba(255,79,163,.32);}
.topic-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}

/* ---------- 折叠面板 ---------- */
.acc-group{margin-bottom:40px;}
.acc-group:last-child{margin-bottom:0;}
.acc-group-title{
  display:flex;align-items:center;gap:12px;margin-bottom:18px;
  font-size:15px;color:var(--tx-2);font-weight:600;
}
.acc-group-title::after{
  content:"";flex:1;height:1px;
  background:linear-gradient(90deg,var(--line-strong),transparent);
}
.acc-item{
  background:var(--bg-raise);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease;
}
.acc-item:last-child{margin-bottom:0;}
.acc-item:hover{border-color:rgba(53,242,224,.3);}
.acc-item.is-open{border-color:var(--line-strong);box-shadow:var(--sh-1);}
.acc-head{
  width:100%;display:flex;align-items:center;gap:14px;min-height:56px;
  padding:12px 20px;background:transparent;border:0;cursor:pointer;text-align:left;
  color:var(--tx-1);font-size:16px;font-weight:600;line-height:1.5;
  transition:background .22s ease;
}
.acc-head:hover{background:rgba(53,242,224,.05);}
.acc-index{
  font-family:var(--font-num);font-size:13px;color:var(--c-primary);
  flex:0 0 auto;opacity:.85;
}
.acc-q{flex:1;min-width:0;}
.acc-icon{
  position:relative;flex:0 0 20px;width:20px;height:20px;
}
.acc-icon::before,.acc-icon::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
  transition:transform .28s ease,opacity .28s ease;
}
.acc-icon::before{left:2px;right:2px;top:9px;height:2px;}
.acc-icon::after{top:2px;bottom:2px;left:9px;width:2px;}
.acc-item.is-open .acc-icon::after{transform:scaleY(0);opacity:0;}
.acc-body{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.acc-inner{padding:2px 20px 22px 54px;border-top:1px solid var(--line);}
.acc-inner p{font-size:15px;color:var(--tx-2);padding-top:16px;}
.acc-list{margin-top:12px;}
.acc-list li{
  position:relative;padding-left:16px;font-size:14.5px;color:var(--tx-2);margin-bottom:8px;
}
.acc-list li::before{
  content:"";position:absolute;left:0;top:11px;width:3px;height:3px;border-radius:50%;
  background:var(--c-primary);
}

/* ---------- 处理流程 ---------- */
.step-list{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;}
.step-item{
  position:relative;padding:24px 20px 22px;border-radius:var(--r-card);
  background:var(--bg-raise);border:1px solid var(--line);box-shadow:var(--sh-1);
  transition:all .25s ease;
}
.step-item:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2);}
.step-num{
  font-family:var(--font-num);font-size:30px;font-weight:700;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(53,242,224,.65);
  margin-bottom:14px;display:block;
}
.step-item h3{margin-bottom:8px;font-size:17px;}
.step-item p{font-size:14px;color:var(--tx-2);margin:0;}

/* ---------- 指标与引用 ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:40px;}
.metric-card{
  padding:24px 20px;border-radius:var(--r-card);background:var(--bg-elevated);
  border:1px solid var(--line);text-align:left;transition:all .25s ease;
}
.metric-card:hover{border-color:var(--line-strong);box-shadow:var(--sh-2);}
.metric-num{
  font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--c-primary);
  line-height:1.2;letter-spacing:.4px;
}
.metric-card .metric-num.accent{color:var(--c-accent);}
.metric-card .metric-num.violet{color:#B9A6FF;}
.metric-label{font-size:13.5px;color:var(--tx-2);margin-top:8px;}
.quote-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.quote-card{
  position:relative;padding:24px 24px 24px 28px;border-radius:var(--r-card);
  background:var(--bg-raise);border:1px solid var(--line);
}
.quote-card::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:4px;border-radius:0 3px 3px 0;
  background:var(--c-accent);
}
.quote-card p{font-size:15px;color:var(--tx-1);margin-bottom:14px;}
.quote-from{font-size:13px;color:var(--tx-3);}

/* ---------- 反馈表单 ---------- */
.support-wrap{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:start;}
.support-copy h2{margin-bottom:18px;}
.support-copy p{color:var(--tx-2);font-size:15px;}
.support-list{margin-top:24px;}
.support-list li{
  display:flex;gap:12px;align-items:flex-start;padding:14px 0;
  border-top:1px solid var(--line);font-size:14.5px;color:var(--tx-2);
}
.support-list li:last-child{border-bottom:1px solid var(--line);}
.li-dot{
  flex:0 0 20px;width:20px;height:20px;border-radius:6px;margin-top:6px;
  background:rgba(53,242,224,.12);border:1px solid rgba(53,242,224,.35);
  position:relative;
}
.li-dot::after{
  content:"";position:absolute;left:6px;top:6px;width:6px;height:6px;border-radius:2px;
  background:var(--c-primary);
}
.support-form{
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--r-panel);
  padding:28px;box-shadow:var(--sh-1);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;color:var(--tx-2);margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;background:var(--bg-raise);border:1px solid var(--line);color:var(--tx-1);
  border-radius:10px;padding:0 14px;height:46px;font-size:16px;font-family:inherit;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.field textarea{height:112px;padding:12px 14px;resize:vertical;line-height:1.75;}
.field input::placeholder,.field textarea::placeholder{color:var(--tx-3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(53,242,224,.14);
}
.field select option{background:var(--bg-raise);color:var(--tx-1);}
.support-form .btn{width:100%;}
.form-tip{font-size:13px;color:var(--tx-3);margin:12px 0 0;}
.form-tip.is-ok{color:var(--c-primary);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-strip);border-top:1px solid var(--line);position:relative;
  padding:64px 0 0;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent) 40%,transparent);
  opacity:.6;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--tx-1);font-weight:700;font-size:17px;margin-bottom:16px;}
.footer-about{font-size:14px;color:var(--tx-3);line-height:1.8;max-width:340px;}
.footer-col h4{color:var(--tx-1);font-size:15px;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--tx-2);}
.footer-links a:hover{color:var(--c-primary);}
.footer-contact{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--tx-3);}
.footer-contact strong{color:var(--tx-2);font-weight:500;}
.footer-bottom{
  margin-top:52px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--tx-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .topic-grid{grid-template-columns:repeat(2,1fr);}
  .step-list{grid-template-columns:repeat(2,1fr);}
  .metric-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:30px;}
}
@media (max-width:991px){
  .nav-toggle{display:block;}
  .main-nav{
    position:fixed;inset:70px 0 0 0;background:var(--bg-deep);
    flex-direction:column;align-items:stretch;gap:0;padding:18px 20px 40px;
    transform:translateX(100%);transition:transform .3s ease;overflow-y:auto;
    border-top:1px solid var(--line);z-index:55;
  }
  .nav-open .main-nav{transform:translateX(0);}
  .nav-link{
    height:52px;border-radius:10px;padding:0 16px;font-size:16px;
    border-left:3px solid transparent;
  }
  .nav-link::after{display:none;}
  .nav-link.is-active{border-left-color:var(--c-primary);box-shadow:none;background:rgba(53,242,224,.08);}
  .support-wrap{grid-template-columns:1fr;gap:32px;}
  .quote-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .container{padding:0 16px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  .page-hero-inner{padding:40px 0 36px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .topic-grid{grid-template-columns:1fr;}
  .topic-card{flex-direction:column;gap:14px;}
  .topic-thumb{width:100%;flex:none;height:160px;}
  .step-list{grid-template-columns:1fr;}
  .metric-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .acc-head{padding:12px 16px;font-size:15px;}
  .acc-inner{padding:2px 16px 20px 16px;}
  .btn{width:100%;}
  .nav-actions .btn-sm{width:auto;}
}
@media (max-width:520px){
  .stat-item{padding:20px 16px;}
  .metric-card{padding:20px 16px;}
  .support-form{padding:20px 16px;}
  .hero-tag{font-size:12px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important;}
}