/* roulang page: index */
:root{
  --bg:#060A16;
  --panel:#0B1226;
  --panel-2:#0F1730;
  --primary:#21D4E0;
  --primary-deep:#12A9B8;
  --secondary:#7A5CFF;
  --accent:#FFB020;
  --danger:#FF5C7A;
  --text:#EAF2FF;
  --text-2:#9FB0CC;
  --text-3:#6B7C99;
  --line:rgba(255,255,255,.10);
  --line-soft:rgba(255,255,255,.06);
  --glass:rgba(255,255,255,.055);
  --glass-hi:inset 0 1px 0 rgba(255,255,255,.08);
  --r-lg:16px;
  --r-md:12px;
  --r-img:14px;
  --sh-1:0 10px 30px -12px rgba(0,0,0,.55);
  --sh-2:0 18px 42px -14px rgba(0,0,0,.65);
  --glow:0 0 24px -6px rgba(33,212,224,.45);
  --side-w:260px;
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);font-family:var(--font);
  font-size:16px;line-height:1.85;letter-spacing:0;text-align:left;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 32% 8%,#000 0%,transparent 72%);
  mask-image:radial-gradient(circle at 32% 8%,#000 0%,transparent 72%);
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:#5FE6EF}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.28;letter-spacing:0}
p{margin:0 0 1.2em}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* ---------- App Shell ---------- */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--side-w);z-index:1040;
  display:flex;flex-direction:column;padding:22px 16px 16px;
  background:linear-gradient(180deg,rgba(11,18,38,.97),rgba(6,10,22,.97));
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--line);
  transition:transform .22s ease;
}
.brand{display:flex;align-items:center;gap:11px;padding:4px 8px 18px;border-bottom:1px solid var(--line-soft)}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  color:#04141A;font-weight:800;font-size:14px;letter-spacing:.5px;box-shadow:var(--glow);
}
.brand-text{min-width:0}
.brand-name{display:block;font-size:16px;font-weight:800;color:var(--text);line-height:1.3;white-space:nowrap}
.brand-sub{display:block;font-size:11px;color:var(--text-3);line-height:1.5;white-space:nowrap}
.nav-list{display:flex;flex-direction:column;gap:6px;margin-top:18px;flex:1;overflow-y:auto}
.nav-label{font-size:11px;color:var(--text-3);padding:4px 12px 8px;letter-spacing:.08em}
.nav-link{
  position:relative;display:flex;align-items:center;gap:12px;padding:11px 13px;border-radius:12px;
  color:var(--text-2);font-size:15px;line-height:1.4;transition:background .16s ease,color .16s ease;
}
.nav-link i{width:20px;text-align:center;font-size:16px;color:var(--primary);opacity:.9}
.nav-link:hover{background:rgba(255,255,255,.05);color:var(--text)}
.nav-link.active{background:rgba(33,212,224,.08);color:var(--text);box-shadow:0 0 18px -8px rgba(33,212,224,.55)}
.nav-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:999px;
  background:var(--primary);box-shadow:0 0 10px rgba(33,212,224,.75);
}
.side-foot{
  margin-top:14px;padding:14px;border-radius:14px;background:var(--glass);
  border:1px solid var(--line);box-shadow:var(--glass-hi);
}
.side-foot p{margin:0 0 10px;font-size:12px;line-height:1.7;color:var(--text-3)}
.btn-sm-cta{
  display:block;width:100%;text-align:center;padding:9px 12px;border-radius:12px;font-size:13px;font-weight:700;
  background:linear-gradient(135deg,var(--primary),var(--secondary));color:#04141A;
}
.btn-sm-cta:hover{color:#04141A;transform:translateY(-2px);box-shadow:var(--glow)}

.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:1050;align-items:center;
  justify-content:space-between;padding:0 14px;border-bottom:1px solid var(--line);
  background:rgba(6,10,22,.92);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.topbar-brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:15px;color:var(--text)}
.topbar-brand .brand-mark{width:30px;height:30px;flex:0 0 30px;border-radius:9px;font-size:12px}
.burger{
  width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:var(--glass);
  color:var(--text);display:grid;place-items:center;font-size:16px;cursor:pointer;
}
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,8,16,.72);z-index:1030;opacity:0;visibility:hidden;transition:opacity .22s ease;
}
.drawer-mask.show{opacity:1;visibility:visible}

.main-wrap{position:relative;z-index:1;margin-left:var(--side-w)}
.shell{max-width:1200px;margin:0 auto;padding:0 32px}
section[id]{scroll-margin-top:80px}

/* ---------- Buttons ---------- */
.btn-main,.btn-ghost,.btn-text{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:all .2s ease;border:0;font-weight:700}
.btn-main{
  padding:13px 26px;border-radius:12px;font-size:15px;color:#04141A;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  box-shadow:0 0 0 1px rgba(33,212,224,.35),0 10px 30px -10px rgba(33,212,224,.55);
}
.btn-main:hover{color:#04141A;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(33,212,224,.5),0 16px 38px -12px rgba(33,212,224,.7)}
.btn-main:active{transform:translateY(1px)}
.btn-ghost{
  padding:12px 24px;border-radius:12px;font-size:15px;color:var(--text);
  background:transparent;border:1px solid rgba(33,212,224,.4);
}
.btn-ghost:hover{background:rgba(33,212,224,.08);color:var(--text);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{
  background:none;border:0;padding:4px 0;font-size:14px;color:var(--primary);font-weight:600;
}
.btn-text span{border-bottom:1px solid transparent;transition:border-color .2s ease}
.btn-text:hover span{border-color:var(--primary)}
.btn-main[disabled],.btn-ghost[disabled]{opacity:.45;box-shadow:none;pointer-events:none}

/* ---------- Badges ---------- */
.badge-cat,.badge-hot,.badge-time{
  display:inline-flex;align-items:center;gap:5px;font-size:12px;line-height:1;padding:5px 10px;border-radius:999px;font-weight:600;
}
.badge-cat{background:rgba(33,212,224,.12);color:var(--primary)}
.badge-hot{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#04141A}
.badge-time{background:var(--accent);color:#1A1200}
.badge-soft{background:rgba(122,92,255,.14);color:#B9A8FF}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;min-height:560px;display:flex;align-items:flex-end;
  padding:72px 0 52px;border-bottom:1px solid var(--line-soft);
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,22,.68) 0%,rgba(6,10,22,.84) 52%,rgba(6,10,22,.92) 100%);
}
.hero::after{
  content:"";position:absolute;width:680px;height:680px;right:-160px;top:-200px;pointer-events:none;
  background:radial-gradient(circle,rgba(33,212,224,.14),transparent 62%);
}
.hero .shell{position:relative;z-index:2;width:100%}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--primary);
  background:rgba(33,212,224,.10);border:1px solid rgba(33,212,224,.28);border-radius:999px;padding:6px 14px;margin-bottom:22px;
}
.hero h1{
  font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:800;max-width:15em;margin-bottom:18px;
}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-lead{max-width:44em;color:var(--text-2);font-size:16.5px;line-height:1.85;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:34px;padding:20px 26px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);box-shadow:var(--glass-hi);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
}
.metric{min-width:120px}
.metric b{display:block;font-size:28px;font-weight:800;color:var(--text);line-height:1.2;font-variant-numeric:tabular-nums}
.metric b small{font-size:13px;font-weight:600;color:var(--text-2);margin-left:3px}
.metric span{display:block;font-size:13px;color:var(--text-3)}

/* ---------- Section base ---------- */
.section{padding:104px 0 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head .kicker{font-size:13px;color:var(--primary);letter-spacing:.08em;margin-bottom:10px;display:block}
.section-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:15.5px;margin:0}
.section-head.row-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;max-width:none}

/* ---------- Glass card ---------- */
.glass{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--glass-hi);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
}

/* ---------- Trust strip ---------- */
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust-card{padding:24px 22px;border-radius:var(--r-lg);background:var(--glass);border:1px solid var(--line);box-shadow:var(--glass-hi);transition:all .22s ease}
.trust-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.18)}
.trust-card b{display:block;font-size:30px;font-weight:800;color:var(--primary);line-height:1.2;font-variant-numeric:tabular-nums}
.trust-card b small{font-size:13px;color:var(--text-2);font-weight:600;margin-left:3px}
.trust-card span{display:block;font-size:13px;color:var(--text-3);margin-top:6px}

/* ---------- Ladder ---------- */
.ladder{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.ladder::before{
  content:"";position:absolute;left:4%;right:4%;top:58px;height:1px;
  background:linear-gradient(90deg,rgba(33,212,224,.15),rgba(33,212,224,.55),rgba(255,176,32,.7));
}
.step{position:relative;padding:26px 22px;border-radius:var(--r-lg);background:var(--glass);border:1px solid var(--line);box-shadow:var(--glass-hi);transition:all .24s ease}
.step:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.18)}
.step .num{
  display:block;font-size:13px;font-weight:800;color:var(--primary);letter-spacing:.08em;
  font-variant-numeric:tabular-nums;margin-bottom:16px;
}
.step h3{font-size:18px;margin-bottom:10px}
.step p{font-size:14px;line-height:1.7;color:var(--text-2);margin-bottom:14px}
.step .gate{font-size:13px;color:var(--text-3);margin-bottom:18px}
.step .gate strong{color:var(--text);font-weight:700}
.step-1{box-shadow:var(--glass-hi),0 0 0 1px rgba(33,212,224,.06)}
.step-2{box-shadow:var(--glass-hi),0 0 18px -10px rgba(33,212,224,.5)}
.step-3{box-shadow:var(--glass-hi),0 0 26px -10px rgba(33,212,224,.65)}
.step-4{border-color:rgba(255,176,32,.42);box-shadow:var(--glass-hi),0 0 30px -12px rgba(255,176,32,.6)}
.step-4 .num{color:var(--accent)}

/* ---------- Category twin cards ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.cat-card{border-radius:var(--r-lg);overflow:hidden;background:var(--glass);border:1px solid var(--line);box-shadow:var(--glass-hi);transition:all .24s ease;display:flex;flex-direction:column}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.18)}
.cat-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.cat-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.cat-card:hover .cat-thumb img{transform:scale(1.03)}
.cat-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,22,.05),rgba(6,10,22,.75))}
.cat-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1}
.cat-body h3{font-size:21px;margin-bottom:12px}
.cat-body ul{margin-bottom:22px;flex:1}
.cat-body li{position:relative;padding-left:20px;font-size:14.5px;color:var(--text-2);line-height:1.75;margin-bottom:9px}
.cat-body li::before{content:"";position:absolute;left:0;top:12px;width:7px;height:7px;border-radius:2px;background:var(--primary)}
.cat-card.violet li::before{background:var(--secondary)}
.cat-card.violet .btn-ghost{border-color:rgba(122,92,255,.5)}
.cat-card.violet .btn-ghost:hover{background:rgba(122,92,255,.12)}

/* ---------- Plans ---------- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.plan{
  display:flex;flex-direction:column;padding:30px 26px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);box-shadow:var(--glass-hi);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.plan:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.18)}
.plan.recommend{
  border-color:rgba(33,212,224,.45);transform:translateY(-8px) scale(1.03);
  box-shadow:var(--glass-hi),0 0 34px -12px rgba(33,212,224,.7);z-index:2;position:relative;
}
.plan.recommend:hover{transform:translateY(-11px) scale(1.03)}
.plan-tag{position:absolute;top:-13px;left:26px}
.plan h3{font-size:19px;margin-bottom:6px}
.plan .desc{font-size:13.5px;color:var(--text-3);margin-bottom:20px}
.price{display:flex;align-items:flex-end;gap:8px;margin-bottom:8px}
.price b{font-size:38px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;color:var(--text)}
.price b span{font-size:15px;font-weight:600;margin-left:2px}
.price s{font-size:14px;color:var(--text-3);text-decoration-thickness:1px}
.plan .note{font-size:12.5px;color:var(--text-3);margin-bottom:22px}
.plan-list{border-top:1px solid var(--line-soft);margin-bottom:26px;flex:1}
.plan-list li{
  display:flex;align-items:flex-start;gap:10px;padding:12px 0;font-size:14.5px;color:var(--text-2);
  border-bottom:1px solid var(--line-soft);
}
.plan-list li i{color:var(--primary);font-size:13px;margin-top:6px;flex:0 0 auto}
.plan-list li.off{color:var(--text-3)}
.plan-list li.off i{color:var(--text-3)}
.plan .btn-main,.plan .btn-ghost{width:100%}

/* ---------- Countdown banner ---------- */
.flash{
  margin-top:104px;border-radius:var(--r-lg);overflow:hidden;position:relative;
  background:linear-gradient(100deg,rgba(33,212,224,.14),rgba(122,92,255,.14) 60%,rgba(255,176,32,.12));
  border:1px solid var(--line);box-shadow:var(--glass-hi);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  clip-path:polygon(0 0,calc(100% - 54px) 0,100% 100%,0 100%);
}
.flash-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;padding:34px 40px 34px 34px}
.flash h2{font-size:24px;margin-bottom:8px}
.flash p{margin:0;font-size:14.5px;color:var(--text-2)}
.countdown{display:flex;align-items:center;gap:10px}
.count-cell{
  min-width:70px;padding:9px 12px;border-radius:12px;text-align:center;
  background:rgba(255,176,32,.10);border:1px solid rgba(255,176,32,.35);
}
.count-cell b{display:block;font-size:32px;font-weight:800;line-height:1.15;color:var(--accent);font-variant-numeric:tabular-nums}
.count-cell span{display:block;font-size:11px;color:var(--text-3);margin-top:2px}
.count-sep{font-size:24px;font-weight:800;color:rgba(255,176,32,.7)}

/* ---------- News ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{
  display:flex;flex-direction:column;border-radius:var(--r-lg);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);box-shadow:var(--glass-hi);transition:all .24s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.18);box-shadow:var(--sh-2)}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,rgba(33,212,224,.16),rgba(122,92,255,.18))}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-badge{position:absolute;left:12px;top:12px;z-index:2}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:17px;line-height:1.5;margin-bottom:10px}
.news-body h3 a{color:var(--text)}
.news-body h3 a:hover{color:var(--primary)}
.news-body h3 a{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-sum{font-size:14px;line-height:1.7;color:var(--text-2);margin-bottom:16px;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3)}
.news-meta time{font-variant-numeric:tabular-nums}
.news-meta a{font-size:13px;font-weight:600}
.empty-state{padding:56px 24px;text-align:center;border-radius:var(--r-lg);background:var(--glass);border:1px solid var(--line);box-shadow:var(--glass-hi)}
.empty-state i{font-size:48px;color:var(--primary);opacity:.75;display:block;margin-bottom:16px}
.empty-state p{color:var(--text-2);margin-bottom:20px}

/* ---------- Reviews ---------- */
.review-grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:22px}
.review-main{
  padding:32px 30px;border-radius:var(--r-lg);border:1px solid rgba(33,212,224,.28);
  background:linear-gradient(150deg,rgba(33,212,224,.12),rgba(122,92,255,.10));
  box-shadow:var(--glass-hi);display:flex;flex-direction:column;justify-content:space-between;
}
.review-main b{font-size:44px;font-weight:800;color:var(--primary);line-height:1.1;font-variant-numeric:tabular-nums}
.review-main strong{display:block;font-size:16px;margin:10px 0 14px}
.review-main p{font-size:14px;color:var(--text-2);margin:0}
.review-quote{
  padding:26px 24px;border-radius:var(--r-lg);background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--glass-hi);display:flex;flex-direction:column;justify-content:space-between;transition:all .24s ease;
}
.review-quote:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.18)}
.review-quote p{font-size:14.5px;line-height:1.8;color:var(--text-2);margin-bottom:18px}
.review-quote footer{font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:10px}
.review-quote footer i{color:var(--secondary)}

/* ---------- FAQ ---------- */
.accordion-item{border:0;background:transparent;margin-bottom:14px;border-radius:var(--r-lg);overflow:hidden}
.accordion-button{
  position:relative;width:100%;background:var(--glass)!important;border:1px solid var(--line);border-radius:var(--r-lg)!important;
  color:var(--text)!important;font-size:16px;font-weight:600;padding:19px 56px 19px 24px;box-shadow:none!important;
  transition:background .2s ease,border-color .2s ease;
}
.accordion-button:not(.collapsed){background:rgba(33,212,224,.08)!important;border-color:rgba(33,212,224,.34);color:var(--text)!important}
.accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:13px;bottom:13px;width:3px;border-radius:999px;
  background:var(--primary);box-shadow:0 0 10px rgba(33,212,224,.7);
}
.accordion-button::after{
  background-image:none!important;content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  width:24px;height:24px;line-height:24px;text-align:center;font-size:18px;color:var(--primary);
}
.accordion-button:not(.collapsed)::after{content:"−"}
.accordion-button:focus{box-shadow:none!important;outline:2px solid var(--primary);outline-offset:2px}
.accordion-body{padding:20px 24px 22px;font-size:15px;line-height:1.85;color:var(--text-2);background:transparent}

/* ---------- Form ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr 1.15fr;gap:46px;align-items:start}
.contact-side h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:16px}
.contact-side>p{color:var(--text-2);font-size:15.5px}
.contact-points{margin-top:26px}
.contact-points li{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid var(--line-soft)}
.contact-points li i{
  flex:0 0 34px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-size:14px;
  background:rgba(33,212,224,.20);color:var(--primary);border:1px solid rgba(33,212,224,.32);
}
.contact-points li b{display:block;font-size:15px;font-weight:600;margin-bottom:3px}
.contact-points li span{font-size:13.5px;color:var(--text-3);line-height:1.7}
.form-panel{padding:32px 30px;border-radius:var(--r-lg);background:var(--glass);border:1px solid var(--line);box-shadow:var(--glass-hi)}
.form-row{margin-bottom:18px}
.form-label{display:block;font-size:14px;color:var(--text-2);margin-bottom:8px}
.form-control,.form-select{
  width:100%;background:rgba(255,255,255,.05)!important;border:1px solid var(--line)!important;
  border-radius:12px!important;color:var(--text)!important;padding:12px 14px;font-size:15px;box-shadow:none!important;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.form-control::placeholder{color:var(--text-3)}
.form-control:focus,.form-select:focus{border-color:var(--primary)!important;box-shadow:0 0 0 3px rgba(33,212,224,.20)!important;outline:none}
.form-select{appearance:none;-webkit-appearance:none;-moz-appearance:none;padding-right:40px}
.select-wrap{position:relative}
.select-wrap i{position:absolute;right:15px;top:50%;transform:translateY(-50%);color:var(--primary);font-size:13px;pointer-events:none}
textarea.form-control{min-height:118px;resize:vertical}
.form-tip{font-size:12.5px;color:var(--text-3);margin:14px 0 0;line-height:1.7}
.form-msg{display:none;margin-top:14px;font-size:13.5px;color:var(--primary)}
.form-msg.show{display:block}

/* ---------- Footer ---------- */
.site-footer{margin-top:104px;border-top:1px solid var(--line-soft);background:rgba(11,18,38,.72);padding:64px 0 26px;position:relative;z-index:1}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.foot-brand .brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:11px;font-size:13px}
.foot-brand span{font-size:16.5px;font-weight:800;color:var(--text)}
.site-footer p{font-size:13.5px;color:var(--text-3);line-height:1.85;margin:0}
.foot-col h4{font-size:14px;color:var(--text);margin-bottom:16px;font-weight:700}
.foot-col li{margin-bottom:10px}
.foot-col a{font-size:13.5px;color:var(--text-3)}
.foot-col a:hover{color:var(--primary)}
.foot-contact li{font-size:13.5px;color:var(--text-3);display:flex;gap:10px;align-items:flex-start;margin-bottom:11px}
.foot-contact i{color:var(--primary);font-size:13px;margin-top:6px}
.foot-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.5px;color:var(--text-3);
}

/* ---------- Responsive ---------- */
@media (max-width:1399.98px){:root{--side-w:236px}}
@media (max-width:1199.98px){
  :root{--side-w:220px}
  .shell{padding:0 24px}
  .review-grid{grid-template-columns:1fr 1fr}
  .review-main{grid-column:1/-1;flex-direction:row;align-items:center;gap:26px}
  .review-main div{flex:1}
  .ladder{grid-template-columns:repeat(2,1fr)}
  .ladder::before{display:none}
}
@media (max-width:991.98px){
  .sidebar{transform:translateX(-100%);width:280px;padding-top:18px}
  .sidebar.open{transform:translateX(0)}
  .topbar{display:flex}
  .main-wrap{margin-left:0;padding-top:56px}
  .shell{padding:0 24px}
  .section{padding:72px 0 0}
  .flash{margin-top:72px}
  .site-footer{margin-top:72px;padding-top:48px}
  .hero{min-height:auto;padding:56px 0 46px}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .contact-wrap{grid-template-columns:1fr;gap:32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767.98px){
  body{font-size:15.5px}
  .shell{padding:0 16px}
  .section{padding:56px 0 0}
  .flash{margin-top:56px;clip-path:none}
  .site-footer{margin-top:56px}
  .hero{padding:44px 0 38px}
  .hero-actions{gap:12px}
  .hero-actions .btn-main,.hero-actions .btn-ghost{flex:1 1 100%}
  .hero-metrics{gap:22px;padding:18px 20px}
  .metric{min-width:calc(50% - 11px)}
  .cat-grid{grid-template-columns:1fr}
  .plans{grid-template-columns:1fr;gap:26px}
  .plan.recommend{transform:none}
  .plan.recommend:hover{transform:translateY(-4px)}
  .news-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .review-main{flex-direction:column;align-items:flex-start}
  .ladder{grid-template-columns:1fr}
  .flash-inner{padding:26px 22px}
  .countdown{width:100%;justify-content:flex-start}
  .count-cell{min-width:60px}
  .count-cell b{font-size:26px}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .foot-grid{grid-template-columns:1fr}
}
@media (max-width:575.98px){
  .hero h1{font-size:28px}
  .btn-main,.btn-ghost{width:100%}
  .cat-body,.form-panel,.plan{padding:22px 18px}
  .trust-card{padding:20px 18px}
  .trust-card b{font-size:26px}
  .countdown{gap:6px}
  .count-cell{min-width:0;flex:1;padding:8px 6px}
  .count-cell b{font-size:22px}
  .count-sep{font-size:18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --bg:#060A16;
  --panel:#0B1226;
  --panel-2:#0F1730;
  --primary:#21D4E0;
  --primary-deep:#12A9B8;
  --secondary:#7A5CFF;
  --accent:#FFB020;
  --danger:#FF5C7A;
  --text:#EAF2FF;
  --text-2:#9FB0CC;
  --text-3:#6B7C99;
  --line:rgba(255,255,255,.10);
  --line-soft:rgba(255,255,255,.06);
  --glass:rgba(255,255,255,.055);
  --radius:16px;
  --radius-sm:12px;
  --pill:999px;
  --shadow:0 10px 30px -12px rgba(0,0,0,.55);
  --shadow-hover:0 18px 42px -14px rgba(0,0,0,.65),0 0 24px -6px rgba(33,212,224,.45);
  --glow-btn:0 0 0 1px rgba(33,212,224,.35),0 10px 30px -10px rgba(33,212,224,.55);
  --sidebar-w:260px;
  --gut:20px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.locked{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,opacity .18s ease}
a:hover{color:#5ee7f0}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(33,212,224,.28);color:#fff}

/* ---------- 侧边导航 ---------- */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-w);
  padding:24px 18px 20px;
  background:linear-gradient(180deg,rgba(11,18,38,.92),rgba(6,10,22,.92));
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:20px;
  z-index:1040;transition:transform .22s ease;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:14px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  color:#04121A;font-weight:800;font-size:15px;letter-spacing:.5px;
  box-shadow:var(--glow-btn);
}
.brand-text{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.brand-name{font-size:16px;font-weight:800;letter-spacing:.2px;white-space:nowrap}
.brand-sub{font-size:12px;color:var(--text-3);white-space:nowrap}
.nav-label{font-size:12px;color:var(--text-3);letter-spacing:1px;padding:0 10px 8px}
.nav-list{display:flex;flex-direction:column;gap:4px}
.nav-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:var(--radius-sm);
  color:var(--text-2);font-size:14.5px;line-height:1.4;
  transition:background .2s ease,color .2s ease;
}
.nav-link i{width:20px;text-align:center;font-size:15px;color:var(--primary);opacity:.85}
.nav-link:hover{background:rgba(255,255,255,.05);color:var(--text)}
.nav-link.active{
  background:rgba(33,212,224,.08);color:var(--text);font-weight:600;
  box-shadow:inset 0 0 0 1px rgba(33,212,224,.16);
}
.nav-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--primary);box-shadow:0 0 14px rgba(33,212,224,.7);
}
.side-foot{
  margin-top:auto;padding:16px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.side-foot p{margin:0;font-size:12.5px;line-height:1.7;color:var(--text-2)}
.btn-sm-cta{
  display:block;text-align:center;margin-top:12px;padding:9px 14px;border-radius:var(--radius-sm);
  background:linear-gradient(120deg,var(--primary),var(--secondary));
  color:#04121A;font-weight:700;font-size:13.5px;
  transition:transform .18s ease,box-shadow .18s ease;
}
.btn-sm-cta:hover{color:#04121A;transform:translateY(-2px);box-shadow:var(--glow-btn)}

/* ---------- 顶部栏（移动） ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:1050;
  align-items:center;gap:12px;padding:0 14px;
  background:rgba(11,18,38,.9);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.topbar .brand-name{font-size:15px}
.icon-btn{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  background:var(--glass);color:var(--text);display:grid;place-items:center;font-size:16px;
}
.icon-btn:active{transform:scale(.96)}
.topbar-cta{
  margin-left:auto;padding:8px 14px;border-radius:var(--radius-sm);font-size:13px;font-weight:700;
  background:linear-gradient(120deg,var(--primary),var(--secondary));color:#04121A;
}
.topbar-cta:hover{color:#04121A}
.overlay{
  position:fixed;inset:0;background:rgba(4,8,16,.72);opacity:0;visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease;z-index:1030;
}
.overlay.show{opacity:1;visibility:visible}

/* ---------- 主体布局 ---------- */
.page{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.main{flex:1 1 auto;padding:36px 0 88px}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:rgba(255,255,255,.22)}
.crumb .now{color:var(--text-2);max-width:46ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章布局 ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px;align-items:start}
.article-inner{max-width:820px}

.article-head{padding-bottom:22px;border-bottom:1px solid var(--line-soft)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--pill);font-size:12px;line-height:1.5;
  background:rgba(33,212,224,.12);color:var(--primary);
}
.badge-purple{background:rgba(122,92,255,.16);color:#B9A8FF}
.badge-amber{background:var(--accent);color:#2A1A00}
h1{
  font-size:clamp(28px,4vw,48px);line-height:1.18;font-weight:800;letter-spacing:0;
  margin:16px 0 16px;
}
.postmeta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;font-size:13px;color:var(--text-3)}
.postmeta span{display:inline-flex;align-items:center;gap:6px}
.postmeta i{color:var(--primary);opacity:.8}

.cover{
  margin-top:26px;border-radius:14px;overflow:hidden;position:relative;
  aspect-ratio:16/9;background:linear-gradient(135deg,#0F1730,#1B1440 55%,#0B1226);
  border:1px solid var(--line);
}
.cover img{width:100%;height:100%;object-fit:cover}

/* ---------- 富文本 ---------- */
.richtext{font-size:16.5px;line-height:1.9;color:var(--text);margin-top:30px}
.richtext p{margin:0 0 1.2em}
.richtext h2{
  position:relative;padding-left:16px;
  font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;
  margin:44px 0 16px;scroll-margin-top:80px;
}
.richtext h2::before{content:"";position:absolute;left:0;top:.34em;width:4px;height:1em;border-radius:2px;background:var(--primary);box-shadow:0 0 12px rgba(33,212,224,.55)}
.richtext h3{position:relative;padding-left:14px;font-size:20px;line-height:1.45;font-weight:600;margin:32px 0 12px}
.richtext h3::before{content:"";position:absolute;left:0;top:.85em;width:12px;height:2px;border-radius:2px;background:var(--primary)}
.richtext h4{font-size:17px;font-weight:600;margin:24px 0 10px;color:#D8E6FF}
.richtext ul,.richtext ol{margin:0 0 1.2em;padding-left:1.35em}
.richtext ul{list-style:disc}
.richtext ol{list-style:decimal}
.richtext li{margin:6px 0}
.richtext li::marker{color:var(--primary)}
.richtext blockquote{
  margin:0 0 1.2em;padding:16px 20px;font-style:normal;color:var(--text-2);
  background:var(--glass);border-left:3px solid var(--primary);border-radius:var(--radius-sm);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.richtext img{border-radius:12px;margin:20px auto}
.richtext figure{margin:20px 0}
.richtext figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:8px}
.richtext a{color:var(--primary);text-decoration:underline;text-underline-offset:2px}
.richtext a:hover{color:#7ceef7}
.richtext code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;background:rgba(255,255,255,.07);padding:2px 6px;border-radius:6px;color:#9BEAF2;
}
.richtext pre{
  background:#04070F;border:1px solid var(--line);border-radius:12px;
  padding:16px;margin:0 0 1.2em;overflow-x:auto;
}
.richtext pre code{background:none;padding:0;font-size:13.5px;line-height:1.7;color:#C9D8FF}
.richtext hr{border:0;border-top:1px solid var(--line-soft);margin:34px 0}
.richtext table{width:100%;border-collapse:collapse;margin:0 0 1.2em;font-size:15px}
.richtext th,.richtext td{border-bottom:1px solid var(--line-soft);padding:10px 12px;text-align:left}
.richtext th{color:var(--text-2);font-weight:600;font-size:13.5px}

/* ---------- 空态 ---------- */
.empty-state{
  margin-top:30px;padding:56px 24px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;
}
.empty-state i{font-size:48px;color:var(--primary);opacity:.75}
.empty-state p{font-size:15px;color:var(--text-2)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;line-height:1.3;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{
  background:linear-gradient(120deg,var(--primary),var(--secondary));
  color:#04121A;box-shadow:var(--glow-btn);
}
.btn-primary:hover{color:#04121A;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(33,212,224,.5),0 16px 38px -12px rgba(33,212,224,.6)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent;border-color:rgba(33,212,224,.4);color:var(--primary);
}
.btn-ghost:hover{background:rgba(33,212,224,.08);color:#7ceef7;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn[disabled],.btn.disabled{opacity:.45;box-shadow:none;pointer-events:none}

/* ---------- 标签 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line-soft)}
.tag{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:var(--pill);
  font-size:12px;color:var(--text-2);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  transition:border-color .2s ease,color .2s ease;
}
.tag:hover{border-color:rgba(33,212,224,.5);color:var(--primary)}

/* ---------- 上下篇 ---------- */
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:34px}
.pn-card{
  display:block;padding:18px 20px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.pn-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.18);box-shadow:var(--shadow-hover)}
.pn-label{font-size:12px;color:var(--text-3);display:flex;align-items:center;gap:6px}
.pn-title{display:block;margin-top:8px;font-size:15px;font-weight:600;color:var(--text);line-height:1.6}
.pn-card.next{text-align:right}
.pn-card.next .pn-label{justify-content:flex-end}

/* ---------- 侧栏 ---------- */
.aside-card{
  padding:20px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.aside-card + .aside-card{margin-top:20px}
.aside-title{font-size:14px;font-weight:700;display:flex;align-items:center;gap:8px;margin-bottom:14px}
.aside-title i{color:var(--primary)}
.toc-list li + li{margin-top:2px}
.toc-list a{
  display:block;padding:7px 10px;border-radius:10px;font-size:13.5px;line-height:1.6;
  color:var(--text-2);border-left:2px solid transparent;transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.toc-list a:hover{background:rgba(255,255,255,.05);color:var(--text)}
.toc-list a.active{color:var(--primary);border-left-color:var(--primary);background:rgba(33,212,224,.07)}
.toc-empty{font-size:13px;color:var(--text-3);line-height:1.8}
.mini-post{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line-soft)}
.mini-post:last-child{border-bottom:0;padding-bottom:0}
.mini-thumb{
  width:74px;height:52px;flex:0 0 74px;border-radius:10px;overflow:hidden;
  background:linear-gradient(135deg,#0F1730,#1B1440);border:1px solid var(--line);
}
.mini-thumb img{width:100%;height:100%;object-fit:cover}
.mini-title{font-size:13.5px;line-height:1.6;color:var(--text);display:block}
.mini-date{font-size:12px;color:var(--text-3);margin-top:4px;display:block}

/* ---------- 相关推荐 ---------- */
.section{margin-top:56px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.section-head h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.35}
.section-head p{font-size:13.5px;color:var(--text-3);margin-top:6px}
.text-link{font-size:13.5px;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.text-link:hover{gap:10px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gut)}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.18);box-shadow:var(--shadow-hover)}
.card-media{aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#0F1730,#1B1440)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .24s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto}
.card-body h3{font-size:16.5px;font-weight:600;line-height:1.55;margin-bottom:8px}
.card-body p{font-size:13.5px;line-height:1.7;color:var(--text-2);margin-bottom:16px}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12.5px;color:var(--text-3)}

/* ---------- CTA 横幅 ---------- */
.cta-banner{
  margin-top:64px;padding:34px 36px;border-radius:var(--radius);
  background:
    radial-gradient(700px 260px at 12% 0%,rgba(33,212,224,.16),transparent 65%),
    radial-gradient(600px 240px at 92% 100%,rgba(122,92,255,.18),transparent 65%),
    var(--panel);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-banner h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.35}
.cta-banner p{font-size:14px;color:var(--text-2);margin-top:8px;max-width:56ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.footer{margin-top:0;border-top:1px solid var(--line);background:rgba(11,18,38,.6)}
.foot-note{
  display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-2);
  padding:16px 20px;border-radius:var(--radius-sm);background:var(--glass);
  border:1px solid var(--line);box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  margin:40px 0 32px;
}
.foot-note i{color:var(--primary)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:34px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.foot-col h4{font-size:14px;font-weight:700;margin-bottom:14px}
.foot-col li + li{margin-top:9px}
.foot-col a,.foot-col span{font-size:13.5px;color:var(--text-2)}
.foot-col a:hover{color:var(--primary)}
.foot-col .muted{display:block;font-size:13px;color:var(--text-3);line-height:1.8}
.foot-bottom{
  border-top:1px solid var(--line-soft);padding:18px 0 34px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1399.98px){:root{--sidebar-w:260px}}
@media (max-width:1199.98px){
  :root{--sidebar-w:236px}
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-aside{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .aside-card + .aside-card{margin-top:0}
}
@media (max-width:991.98px){
  :root{--sidebar-w:220px}
  .sidebar{width:280px;transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .topbar{display:flex}
  .page{margin-left:0;padding-top:56px}
  .container{padding:0 24px}
  .main{padding:28px 0 72px}
}
@media (max-width:767.98px){
  .container{padding:0 16px}
  .article-aside{grid-template-columns:minmax(0,1fr)}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .prevnext{grid-template-columns:1fr}
  .pn-card.next{text-align:left}
  .pn-card.next .pn-label{justify-content:flex-start}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px}
  .cta-banner{padding:26px 22px}
  .richtext{font-size:16px}
}
@media (max-width:575.98px){
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .btn{width:100%}
  .cta-actions{width:100%}
  .foot-grid{grid-template-columns:1fr}
  .card-body{padding:18px}
  .foot-note{padding:14px 16px;font-size:12.5px}
  h1{font-size:28px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .card:hover,.pn-card:hover,.btn:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --bg:#060A16;
  --panel:#0B1226;
  --panel-2:#0F1730;
  --primary:#21D4E0;
  --primary-deep:#12A9B8;
  --secondary:#7A5CFF;
  --accent:#FFB020;
  --danger:#FF5C7A;
  --text:#EAF2FF;
  --text-2:#9FB0CC;
  --text-3:#6B7C99;
  --stroke:rgba(255,255,255,.10);
  --stroke-strong:rgba(255,255,255,.18);
  --divider:rgba(255,255,255,.06);
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.035);
  --radius:16px;
  --radius-sm:12px;
  --radius-img:14px;
  --shadow-1:0 10px 30px -12px rgba(0,0,0,.55);
  --shadow-2:0 18px 42px -14px rgba(0,0,0,.65);
  --glow:0 0 24px -6px rgba(33,212,224,.45);
  --sidebar-w:236px;
  --section-gap:96px;
}
@media (min-width:1400px){:root{--sidebar-w:260px}}
@media (min-width:992px) and (max-width:1199.98px){:root{--sidebar-w:220px}}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  text-align:left;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,opacity .2s ease}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--text);letter-spacing:0}
h1{font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:800}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3;font-weight:700}
h3{font-size:20px;line-height:1.45;font-weight:600}
h4{font-size:17px;line-height:1.5;font-weight:600}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(33,212,224,.28);color:#fff}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;
}
body.lock{overflow:hidden}

/* 背景装饰 */
.grid-bg{
  position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 70% 12%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 70% 12%,#000 0%,transparent 72%);
}

/* 侧栏 */
.sidebar{
  position:fixed;top:0;bottom:0;left:0;width:var(--sidebar-w);z-index:1040;
  display:flex;flex-direction:column;gap:20px;
  padding:24px 18px;
  background:rgba(11,18,38,.82);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--stroke);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:12px;padding:4px 6px 18px;border-bottom:1px solid var(--divider)}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-family:Inter,system-ui,sans-serif;font-weight:800;font-size:15px;letter-spacing:.5px;
  color:#04121A;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.brand-name{font-size:16px;font-weight:700;color:var(--text);white-space:nowrap}
.brand-sub{font-size:12px;color:var(--text-3);white-space:nowrap}
.nav-list{display:flex;flex-direction:column;gap:6px;flex:1}
.nav-label{
  font-size:12px;color:var(--text-3);letter-spacing:.08em;
  padding:6px 10px;margin-bottom:2px;
}
.nav-link{
  display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:12px;
  border-left:3px solid transparent;
  color:var(--text-2);font-size:15px;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.nav-link i{width:20px;text-align:center;font-size:15px;color:var(--text-3);transition:color .2s ease}
.nav-link:hover{background:rgba(255,255,255,.05);color:var(--text)}
.nav-link:hover i{color:var(--primary)}
.nav-link.active{
  color:var(--primary);
  background:rgba(33,212,224,.08);
  border-left-color:var(--primary);
  box-shadow:0 0 18px -6px rgba(33,212,224,.55);
}
.nav-link.active i{color:var(--primary)}
.side-foot{
  margin-top:auto;padding:16px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--stroke);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  font-size:13px;color:var(--text-2);line-height:1.7;
}
.side-foot p{margin:0 0 12px}
.btn-sm-cta{
  display:block;text-align:center;
  padding:10px 14px;border-radius:12px;
  background:linear-gradient(120deg,var(--primary),var(--secondary));
  color:#04121A;font-weight:700;font-size:14px;
  box-shadow:0 0 0 1px rgba(33,212,224,.35),0 10px 30px -10px rgba(33,212,224,.55);
  transition:transform .2s ease,box-shadow .2s ease;
}
.btn-sm-cta:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(33,212,224,.5),0 16px 34px -10px rgba(33,212,224,.6)}
.btn-sm-cta:active{transform:translateY(1px)}

/* 移动端顶部栏 */
.mobile-topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:1050;
  align-items:center;gap:12px;padding:0 14px;
  background:rgba(11,18,38,.9);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--stroke);
}
.hamburger{
  width:38px;height:38px;border-radius:12px;flex:0 0 38px;
  background:var(--glass);border:1px solid var(--stroke);color:var(--text);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.hamburger:hover{background:rgba(255,255,255,.09)}
.brand-compact{display:flex;align-items:center;gap:8px;min-width:0;flex:1}
.brand-compact .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:12px;box-shadow:none}
.brand-compact .brand-name{font-size:15px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-backdrop{
  display:none;position:fixed;inset:0;z-index:1035;
  background:rgba(4,8,16,.72);opacity:0;transition:opacity .24s ease;
}
.sidebar-backdrop.show{display:block;opacity:1}

/* 主内容 */
.main-content{
  position:relative;z-index:1;
  margin-left:var(--sidebar-w);
  padding:34px 32px 0;
}
.container{
  width:100%;max-width:1200px;margin:0 auto;
  padding-left:0;padding-right:0;
}
.section{margin-top:var(--section-gap)}

/* 面包屑 */
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:18px;
}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:var(--text-3)}
.crumb [aria-current]{color:var(--text-2)}

/* Banner */
.cat-banner{
  position:relative;overflow:hidden;
  min-height:300px;border-radius:var(--radius);
  border:1px solid var(--stroke);
  display:flex;align-items:flex-end;
  padding:36px;
  background-image:
    linear-gradient(180deg,rgba(6,10,22,.35) 0%,rgba(6,10,22,.78) 55%,rgba(6,10,22,.94) 100%),
    url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-1);
}
.cat-banner::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 18% 24%,rgba(33,212,224,.16),transparent 58%),
             radial-gradient(circle at 82% 78%,rgba(122,92,255,.14),transparent 60%);
}
.cat-banner .banner-inner{position:relative;z-index:1;max-width:820px}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.cat-banner h1{margin-bottom:14px}
.banner-lead{font-size:16px;color:var(--text-2);line-height:1.8;max-width:660px;margin:0 0 22px}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px}

/* 按钮 */
.btn-main,.btn-ghost,.btn-text{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;cursor:pointer;
  border-radius:12px;border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn-main{
  padding:13px 24px;
  background:linear-gradient(120deg,var(--primary),var(--secondary));
  color:#04121A;
  box-shadow:0 0 0 1px rgba(33,212,224,.35),0 10px 30px -10px rgba(33,212,224,.55);
}
.btn-main:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(33,212,224,.5),0 18px 38px -12px rgba(33,212,224,.62);color:#04121A}
.btn-main:active{transform:translateY(1px)}
.btn-main.btn-sm{padding:9px 16px;font-size:13px;border-radius:12px}
.btn-ghost{
  padding:12px 22px;color:var(--primary);
  background:transparent;border-color:rgba(33,212,224,.4);
}
.btn-ghost:hover{transform:translateY(-2px);background:rgba(33,212,224,.08);border-color:rgba(33,212,224,.7)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{
  padding:0;color:var(--primary);background:none;border:none;
  text-underline-offset:3px;font-weight:600;
}
.btn-text:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
.btn-main[disabled],.btn-main.disabled{opacity:.45;box-shadow:none;transform:none;pointer-events:none}

/* 徽章与标签 */
.badge-soft,.badge-grad,.badge-time{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;line-height:1;
  padding:6px 11px;border-radius:999px;white-space:nowrap;
}
.badge-soft{background:rgba(33,212,224,.12);color:var(--primary)}
.badge-grad{background:linear-gradient(120deg,var(--primary),var(--secondary));color:#04121A}
.badge-time{background:var(--accent);color:#1A1206}
.badge-violet{background:rgba(122,92,255,.14);color:#B9A6FF}

/* 通用卡片 */
.glass-card{
  position:relative;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--stroke);
  border-radius:var(--radius);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  padding:24px;
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.glass-card:hover{transform:translateY(-4px);border-color:var(--stroke-strong);box-shadow:inset 0 1px 0 rgba(255,255,255,.1),var(--shadow-2)}

/* 板块标题 */
.section-head{margin-bottom:34px;max-width:760px}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--text-2);font-size:15px;margin:0}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.1em;
  color:var(--primary);margin-bottom:12px;
}

/* 图文介绍 */
.intro-grid{display:grid;grid-template-columns:1.02fr 1fr;gap:32px;align-items:center}
.figure{
  position:relative;border-radius:var(--radius-img);overflow:hidden;
  border:1px solid var(--stroke);background:var(--panel-2);aspect-ratio:16/9;
  box-shadow:var(--shadow-1);
}
.figure img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.figure:hover img{transform:scale(1.03)}
.intro-copy p{color:var(--text-2);font-size:16px}
.intro-copy h2{margin-bottom:18px}
.intro-points{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.intro-points li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2)}
.intro-points i{color:var(--primary);margin-top:5px;font-size:13px}

/* 要点卡 */
.point-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.point-card{display:flex;flex-direction:column;gap:12px}
.point-icon{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;color:var(--primary);
  background:rgba(33,212,224,.12);
  border:1px solid rgba(33,212,224,.28);
}
.point-icon.violet{color:#B9A6FF;background:rgba(122,92,255,.14);border-color:rgba(122,92,255,.3)}
.point-icon.amber{color:var(--accent);background:rgba(255,176,32,.13);border-color:rgba(255,176,32,.28)}
.point-card h3{font-size:17px}
.point-card p{font-size:14px;line-height:1.7;color:var(--text-2);margin:0}

/* 定义列表 */
.spec-panel{padding:8px 28px}
.spec-row{
  display:grid;grid-template-columns:220px 1fr;gap:24px;
  padding:20px 0;border-bottom:1px solid var(--divider);align-items:start;
}
.spec-row:last-child{border-bottom:none}
.spec-term{font-size:15px;font-weight:600;color:var(--text);display:flex;align-items:center;gap:8px}
.spec-term i{color:var(--primary);font-size:13px}
.spec-desc{font-size:15px;color:var(--text-2);margin:0}

/* 入口卡 */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.entry-card{display:flex;flex-direction:column;padding:0;overflow:hidden}
.entry-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--panel-2);border-bottom:1px solid var(--divider)}
.entry-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.entry-card:hover .thumb img{transform:scale(1.03)}
.entry-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.entry-body h3{font-size:18px}
.entry-body p{font-size:14px;line-height:1.7;color:var(--text-2);margin:0;flex:1}
.entry-link{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:8px}
.entry-card:hover .entry-link{gap:12px}

/* FAQ */
.faq-accordion .accordion-item{
  background:var(--glass);border:1px solid var(--stroke);border-radius:16px!important;
  margin-bottom:14px;overflow:hidden;
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.faq-accordion .accordion-button{
  background:transparent;color:var(--text);
  font-size:17px;font-weight:600;line-height:1.5;
  padding:20px 22px;box-shadow:none;border-radius:16px;
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--primary);
  background:rgba(33,212,224,.07);
  border-left:3px solid var(--primary);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
}
.faq-accordion .accordion-button:focus{box-shadow:none;border-color:transparent}
.faq-accordion .accordion-button::after{
  content:"+";background-image:none!important;
  width:24px;height:24px;flex:0 0 24px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:400;color:var(--primary);
  transform:none;
}
.faq-accordion .accordion-button:not(.collapsed)::after{content:"−";transform:none}
.faq-accordion .accordion-body{padding:0 22px 22px;color:var(--text-2);font-size:15px;line-height:1.85}

/* CTA 横幅 */
.cta-banner{
  position:relative;overflow:hidden;
  border-radius:var(--radius);border:1px solid var(--stroke);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08),var(--shadow-1);
  padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-banner::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 12% 30%,rgba(33,212,224,.14),transparent 55%),
             radial-gradient(circle at 88% 70%,rgba(122,92,255,.14),transparent 58%);
}
.cta-banner .cta-copy{position:relative;z-index:1;max-width:640px}
.cta-banner h2{font-size:clamp(22px,2.2vw,28px);margin-bottom:10px}
.cta-banner p{color:var(--text-2);font-size:15px;margin:0}
.cta-banner .cta-actions{position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap}

/* 页脚 */
.site-footer{
  position:relative;z-index:1;
  margin-left:var(--sidebar-w);
  margin-top:96px;
  padding:64px 32px 28px;
  border-top:1px solid var(--stroke);
  background:linear-gradient(180deg,rgba(11,18,38,0) 0%,rgba(11,18,38,.8) 100%);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{width:38px;height:38px;flex:0 0 38px;font-size:14px;box-shadow:none}
.footer-about{font-size:14px;color:var(--text-2);line-height:1.8;max-width:340px}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--divider);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a:hover{color:var(--primary)}

/* 响应式 */
@media (max-width:1199.98px){
  .point-grid{grid-template-columns:repeat(2,1fr)}
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  :root{--section-gap:72px}
}
@media (max-width:991.98px){
  :root{--section-gap:72px}
  .mobile-topbar{display:flex}
  .sidebar{
    transform:translateX(-100%);
    transition:transform .26s ease;
    width:280px;
    padding-top:26px;
  }
  .sidebar.open{transform:translateX(0);box-shadow:var(--shadow-2)}
  .main-content{margin-left:0;padding:78px 24px 0}
  .site-footer{margin-left:0;margin-top:72px;padding:52px 24px 24px}
  .intro-grid{grid-template-columns:1fr;gap:26px}
  .cat-banner{min-height:260px;padding:28px}
  .spec-panel{padding:4px 20px}
  .spec-row{grid-template-columns:1fr;gap:8px;padding:16px 0}
}
@media (max-width:767.98px){
  :root{--section-gap:56px}
  body{font-size:15.5px;line-height:1.8}
  .main-content{padding:74px 16px 0}
  .site-footer{margin-top:56px;padding:44px 16px 22px}
  .point-grid{grid-template-columns:1fr}
  .entry-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cat-banner{min-height:230px;padding:22px;border-radius:14px}
  .banner-lead{font-size:15px}
  .cta-banner{padding:26px}
  .intro-copy p{font-size:15px}
  .spec-desc{font-size:14.5px}
}
@media (max-width:575.98px){
  h1{font-size:28px}
  h2{font-size:23px}
  h3{font-size:18px}
  .glass-card{padding:18px}
  .banner-actions,.cta-actions{width:100%}
  .banner-actions .btn-main,.banner-actions .btn-ghost,
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:100%}
  .faq-accordion .accordion-button{font-size:15.5px;padding:16px 16px}
  .faq-accordion .accordion-body{padding:0 16px 18px;font-size:14.5px}
  .brand-compact .brand-name{font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --bg:#060A16;
  --panel:#0B1226;
  --panel-2:#0F1730;
  --brand:#21D4E0;
  --brand-deep:#12A9B8;
  --violet:#7A5CFF;
  --amber:#FFB020;
  --danger:#FF5C7A;
  --text:#EAF2FF;
  --text-2:#9FB0CC;
  --text-3:#6B7C99;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.18);
  --divider:rgba(255,255,255,.06);
  --glass:rgba(255,255,255,.055);
  --radius-lg:16px;
  --radius-md:12px;
  --radius-img:14px;
  --sidebar-w:260px;
  --shadow-1:0 10px 30px -12px rgba(0,0,0,.55);
  --shadow-2:0 18px 42px -14px rgba(0,0,0,.65);
  --glow-brand:0 0 24px -6px rgba(33,212,224,.45);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --t:200ms cubic-bezier(.4,0,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:72px 72px;
  pointer-events:none;
  z-index:0;
}
a{color:var(--brand);text-decoration:none;transition:color var(--t)}
a:hover{color:#5ee7ef}
img{max-width:100%;display:block}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
button{font-family:inherit}
.tnum{font-variant-numeric:tabular-nums}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- 侧边导航 ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  z-index:50;
  display:flex;
  flex-direction:column;
  padding:22px 16px 18px;
  background:rgba(11,18,38,.78);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--line);
  overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:12px;padding:0 8px 22px;border-bottom:1px solid var(--divider)}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;
  display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(135deg,var(--brand),var(--violet));
  color:#06121A;font-weight:800;font-size:15px;letter-spacing:.5px;
  box-shadow:0 0 0 1px rgba(33,212,224,.35),0 10px 30px -12px rgba(33,212,224,.55);
}
.brand-text{display:flex;flex-direction:column;line-height:1.3}
.brand-name{font-size:16px;font-weight:800;color:var(--text)}
.brand-sub{font-size:12px;color:var(--text-3)}

.nav-list{display:flex;flex-direction:column;gap:6px;padding:18px 0 0}
.nav-label{
  font-size:12px;color:var(--text-3);
  padding:0 12px;margin-bottom:6px;letter-spacing:1px;
}
.nav-link{
  display:flex;align-items:center;gap:12px;
  padding:11px 12px;
  border-radius:var(--radius-md);
  color:var(--text-2);
  font-size:15px;
  position:relative;
  transition:background var(--t),color var(--t);
}
.nav-link i{width:20px;text-align:center;font-size:15px;color:var(--brand);opacity:.85}
.nav-link:hover{background:rgba(255,255,255,.05);color:var(--text)}
.nav-link.active{
  background:rgba(33,212,224,.08);
  color:var(--text);
  font-weight:600;
  box-shadow:inset 0 0 0 1px rgba(33,212,224,.18),0 0 22px -10px rgba(33,212,224,.6);
}
.nav-link.active::before{
  content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;
  background:var(--brand);
}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.side-foot{
  margin-top:auto;
  padding:16px;
  border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  font-size:13px;
  color:var(--text-2);
  line-height:1.7;
}
.btn-sm-cta{
  display:block;text-align:center;margin-top:12px;
  padding:9px 14px;border-radius:var(--radius-md);
  background:linear-gradient(135deg,var(--brand),var(--violet));
  color:#06121A;font-weight:700;font-size:14px;
  transition:transform var(--t),box-shadow var(--t);
  box-shadow:0 0 0 1px rgba(33,212,224,.3),0 10px 26px -12px rgba(33,212,224,.6);
}
.btn-sm-cta:hover{transform:translateY(-2px);color:#06121A;box-shadow:0 0 0 1px rgba(33,212,224,.5),0 14px 30px -12px rgba(33,212,224,.75)}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;
  z-index:70;
  align-items:center;gap:12px;
  padding:0 16px;
  background:rgba(11,18,38,.9);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.topbar .brand-name{font-size:15px}
.menu-btn{
  width:38px;height:38px;border-radius:var(--radius-md);
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  color:var(--text);display:grid;place-items:center;font-size:16px;
}
.menu-btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.topbar-cta{
  margin-left:auto;
  padding:8px 16px;border-radius:var(--radius-md);
  background:linear-gradient(135deg,var(--brand),var(--violet));
  color:#06121A;font-weight:700;font-size:14px;
}
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,8,16,.72);
  opacity:0;visibility:hidden;transition:opacity var(--t);z-index:45;
}
.drawer-mask.show{opacity:1;visibility:visible}

/* ---------- 主内容 ---------- */
.shell{position:relative;z-index:1;margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.main{flex:1 1 auto;padding:36px 0 0}
.section{padding:56px 0}

/* 面包屑 */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--text-3);opacity:.7}
.crumb .current{color:var(--text-2);max-width:260px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* Banner */
.banner{
  position:relative;overflow:hidden;
  min-height:300px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  display:flex;align-items:flex-end;
  padding:36px;
  background-image:linear-gradient(120deg,rgba(122,92,255,.34),rgba(6,10,22,.94) 62%),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.banner::after{
  content:"";position:absolute;right:-90px;top:-90px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(122,92,255,.34),transparent 68%);
  pointer-events:none;
}
.banner-inner{position:relative;z-index:2;max-width:720px}
.h1-kicker{display:block;font-size:14px;font-weight:700;letter-spacing:2px;color:var(--brand);margin-bottom:10px}
.banner h1{
  font-size:clamp(30px,4.2vw,52px);
  line-height:1.18;font-weight:800;letter-spacing:0;
}
.banner p{margin-top:14px;color:var(--text-2);font-size:16px;max-width:600px}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

/* 按钮 */
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-md);
  font-size:15px;font-weight:700;cursor:pointer;
  transition:transform var(--t),box-shadow var(--t),background var(--t),border-color var(--t);
}
.btn-main{
  background:linear-gradient(135deg,var(--brand),var(--violet));
  color:#06121A;border:none;
  box-shadow:0 0 0 1px rgba(33,212,224,.35),0 10px 30px -10px rgba(33,212,224,.55);
}
.btn-main:hover{transform:translateY(-2px);color:#06121A;box-shadow:0 0 0 1px rgba(33,212,224,.55),0 18px 42px -14px rgba(33,212,224,.7)}
.btn-main:active{transform:translateY(1px)}
.btn-main:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-ghost{
  background:transparent;color:var(--brand);
  border:1px solid rgba(33,212,224,.4);
}
.btn-ghost:hover{background:rgba(33,212,224,.08);transform:translateY(-2px);color:var(--brand);border-color:rgba(33,212,224,.6)}
.btn-ghost:active{transform:translateY(1px)}
.btn-ghost:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-main[disabled],.btn-ghost[disabled]{opacity:.45;box-shadow:none;pointer-events:none}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-size:14px;font-weight:600;
  border-bottom:1px solid transparent;transition:border-color var(--t),color var(--t);
}
.btn-text:hover{border-bottom-color:var(--brand);color:var(--brand)}

/* 通用板块标题 */
.sec-head{margin-bottom:34px;max-width:760px}
.sec-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.3}
.sec-head p{margin-top:12px;color:var(--text-2);font-size:16px}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:1.5px;color:var(--brand);background:rgba(33,212,224,.12);border-radius:999px;padding:4px 12px;margin-bottom:14px}

/* 交替图文行 */
.flow-row{
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
  padding:32px;
  border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  margin-bottom:24px;
  transition:transform var(--t),border-color var(--t);
}
.flow-row:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.flow-row.reverse .flow-media{order:2}
.flow-media{border-radius:var(--radius-img);overflow:hidden;aspect-ratio:16/9;background:linear-gradient(135deg,var(--panel-2),#131c38)}
.flow-media img{width:100%;height:100%;object-fit:cover;transition:transform 240ms ease}
.flow-row:hover .flow-media img{transform:scale(1.03)}
.flow-body h3{font-size:20px;font-weight:600;display:flex;align-items:center;gap:10px}
.flow-body h3 .idx{
  font-size:12px;font-weight:700;color:var(--violet);
  background:rgba(122,92,255,.14);border-radius:999px;padding:3px 10px;letter-spacing:1px;
}
.flow-body p{margin-top:14px;color:var(--text-2);font-size:15px;line-height:1.85}
.flow-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.chip{
  font-size:12px;padding:4px 10px;border-radius:999px;
  background:rgba(33,212,224,.12);color:var(--brand);
}
.chip.violet{background:rgba(122,92,255,.16);color:#a998ff}

/* 时间线 */
.timeline{position:relative;margin-top:8px;padding-left:44px}
.timeline::before{
  content:"";position:absolute;left:15px;top:12px;bottom:12px;width:2px;
  background:linear-gradient(180deg,rgba(33,212,224,.7),rgba(122,92,255,.45),rgba(33,212,224,.06));
}
.tl-item{position:relative;padding:0 0 34px 0}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  position:absolute;left:-44px;top:6px;
  width:32px;height:32px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--panel-2);
  border:1px solid rgba(33,212,224,.45);
  color:var(--brand);font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;
  box-shadow:0 0 20px -4px rgba(33,212,224,.55);
}
.tl-card{
  padding:22px 24px;border-radius:var(--radius-lg);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  transition:transform var(--t),border-color var(--t);
}
.tl-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.tl-card h3{font-size:17px;font-weight:600}
.tl-card p{margin-top:10px;color:var(--text-2);font-size:14px;line-height:1.8}
.tl-tag{display:inline-block;margin-top:12px;font-size:12px;color:var(--amber);background:rgba(255,176,32,.13);border-radius:999px;padding:4px 10px}

/* 对比双栏 */
.compare{display:grid;grid-template-columns:1.15fr 1fr;gap:24px}
.compare-card{
  padding:28px;border-radius:var(--radius-lg);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  transition:transform var(--t),border-color var(--t);
}
.compare-card:hover{transform:translateY(-4px)}
.compare-strong{background:linear-gradient(160deg,rgba(33,212,224,.10),rgba(11,18,38,.7));border-color:rgba(33,212,224,.28)}
.compare-soft{background:rgba(255,255,255,.035)}
.compare-card h3{font-size:20px;font-weight:600;margin-bottom:16px}
.compare-card ul li{
  position:relative;padding:12px 0 12px 26px;
  border-bottom:1px solid var(--divider);
  color:var(--text-2);font-size:15px;line-height:1.75;
}
.compare-card ul li:last-child{border-bottom:none}
.compare-card ul li::before{
  content:"";position:absolute;left:0;top:20px;
  width:9px;height:9px;border-radius:50%;
  background:var(--brand);opacity:.9;
}
.compare-soft ul li::before{background:var(--violet);opacity:.85}

/* 内容入口宽卡 */
.entry-wide{
  display:grid;grid-template-columns:240px 1fr auto;gap:24px;align-items:center;
  padding:22px;
  border-radius:var(--radius-lg);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  margin-bottom:18px;
  transition:transform var(--t),border-color var(--t);
}
.entry-wide:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.entry-wide .thumb{
  border-radius:var(--radius-img);overflow:hidden;aspect-ratio:16/9;
  background:linear-gradient(135deg,var(--panel-2),#131c38);
}
.entry-wide .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 240ms ease}
.entry-wide:hover .thumb img{transform:scale(1.03)}
.entry-wide h3{font-size:18px;font-weight:600}
.entry-wide p{margin-top:8px;color:var(--text-2);font-size:14px;line-height:1.75}
.entry-wide .go{white-space:nowrap}

/* FAQ */
.faq .accordion-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-md)!important;
  overflow:hidden;
  margin-bottom:12px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.faq .accordion-button{
  background:transparent;
  color:var(--text);
  font-size:16px;font-weight:600;
  padding:18px 22px;
  box-shadow:none!important;
  transition:background var(--t),color var(--t);
}
.faq .accordion-button::after{
  filter:brightness(0) invert(1) opacity(.6);
  transition:transform var(--t);
}
.faq .accordion-button:not(.collapsed){
  color:var(--brand);
  background:rgba(33,212,224,.06);
  box-shadow:inset 3px 0 0 var(--brand)!important;
}
.faq .accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.faq .accordion-body{
  color:var(--text-2);
  font-size:15px;line-height:1.85;
  padding:0 22px 20px;
}

/* CTA 横幅 */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--radius-lg);
  border:1px solid rgba(33,212,224,.24);
  padding:38px;
  display:flex;flex-wrap:wrap;align-items:center;gap:26px;justify-content:space-between;
  background:linear-gradient(120deg,rgba(33,212,224,.12),rgba(122,92,255,.14) 58%,rgba(11,18,38,.7));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.cta-band::after{
  content:"";position:absolute;left:50%;bottom:-140px;width:420px;height:280px;transform:translateX(-50%);
  background:radial-gradient(ellipse,rgba(33,212,224,.16),transparent 70%);
  pointer-events:none;
}
.cta-band .cta-text{position:relative;z-index:2;max-width:620px}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);font-weight:700}
.cta-band p{margin-top:10px;color:var(--text-2);font-size:15px}
.cta-band .cta-act{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:14px}

/* 页脚 */
.site-footer{
  margin-top:72px;
  border-top:1px solid var(--line);
  background:rgba(11,18,38,.55);
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:32px;
}
.footer-brand .brand{padding:0 0 16px;border-bottom:none}
.footer-brand p{color:var(--text-2);font-size:14px;line-height:1.8;max-width:320px}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:var(--text-2);font-size:14px}
.footer-col ul li a:hover{color:var(--brand)}
.footer-col p{color:var(--text-2);font-size:14px;line-height:1.8}
.footer-note{
  margin-top:36px;padding:16px 20px;
  border-radius:var(--radius-md);
  background:var(--glass);border:1px solid var(--line);
  display:flex;align-items:center;gap:10px;
  color:var(--text-2);font-size:13px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.footer-note i{color:var(--brand)}
.footer-bottom{
  margin-top:22px;padding-top:22px;
  border-top:1px solid var(--divider);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  color:var(--text-3);font-size:13px;
}

/* 响应式 */
@media (max-width:1399.98px){
  :root{--sidebar-w:236px}
}
@media (max-width:1199.98px){
  :root{--sidebar-w:220px}
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr;gap:26px}
}
@media (max-width:991.98px){
  .topbar{display:flex}
  .sidebar{
    width:280px;
    transform:translateX(-100%);
    transition:transform 240ms cubic-bezier(.4,0,.2,1);
    padding-top:18px;
  }
  .sidebar.open{transform:translateX(0)}
  .shell{margin-left:0;padding-top:56px}
  .main{padding-top:24px}
  .wrap{padding:0 24px}
  .section{padding:44px 0}
  .banner{min-height:260px;padding:28px}
  .compare{grid-template-columns:1fr}
  .entry-wide{grid-template-columns:200px 1fr;gap:20px}
  .entry-wide .go{grid-column:1 / -1}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767.98px){
  .flow-row{grid-template-columns:1fr;gap:20px;padding:22px}
  .flow-row.reverse .flow-media{order:0}
  .timeline{padding-left:38px}
  .tl-dot{left:-38px;width:28px;height:28px;font-size:12px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .cta-band{padding:26px}
}
@media (max-width:575.98px){
  .wrap{padding:0 16px}
  body{font-size:15.5px}
  .banner{padding:22px;min-height:230px}
  .banner-actions{gap:12px}
  .btn-main,.btn-ghost{width:100%}
  .entry-wide{grid-template-columns:1fr;gap:16px;padding:18px}
  .btns-full .btn-main,.btns-full .btn-ghost{width:100%}
  .tl-card{padding:18px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .flow-row:hover,.tl-card:hover,.entry-wide:hover,.compare-card:hover,.btn-main:hover,.btn-ghost:hover{transform:none}
}