/* roulang page: index */
:root{
  --bg:#070B18;
  --panel:#0B1224;
  --panel-2:#0E1730;
  --glass:rgba(18,28,50,.55);
  --primary:#24D3EE;
  --primary-rgb:36,211,238;
  --secondary:#7A5CFF;
  --accent:#C6FF4A;
  --warn:#FF6A3D;
  --text:#E8EEF9;
  --text-2:#93A3BD;
  --line:rgba(120,160,220,.14);
  --divider:rgba(120,160,220,.10);
  --radius-card:18px;
  --radius-glass:20px;
  --radius-img:14px;
  --shadow-card:0 18px 48px rgba(0,0,0,.45);
  --inset:inset 0 1px 0 rgba(255,255,255,.08);
  --grad:linear-gradient(120deg,#24D3EE,#7A5CFF);
  --bs-body-bg:#070B18;
  --bs-body-color:#E8EEF9;
  --bs-primary:#24D3EE;
  --bs-primary-rgb:36,211,238;
  --bs-link-color:#24D3EE;
  --bs-link-hover-color:#7A5CFF;
  --bs-border-color:rgba(120,160,220,.14);
  --bs-border-radius:14px;
  --bs-border-radius-lg:18px;
  --bs-border-radius-sm:10px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,"Segoe UI",sans-serif;
  font-size:15px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);line-height:1.3;}
p{margin:0;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--secondary);}
img{max-width:100%;display:block;}
button{font-family:inherit;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
.container{width:100%;margin:0 auto;padding-left:24px;padding-right:24px;}
@media (min-width:1200px){.container{max-width:1200px;}}
@media (min-width:1400px){.container{max-width:1200px;}}
@media (max-width:575.98px){.container{padding-left:16px;padding-right:16px;}}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 按钮 ---------- */
.btn-glow,.btn-ghost,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 26px;border-radius:999px;font-size:14px;font-weight:700;
  letter-spacing:.4px;cursor:pointer;border:1px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background-position .4s ease,border-color .22s ease,color .22s ease;
  white-space:nowrap;
}
.btn-glow{
  color:#04121B;
  background:linear-gradient(120deg,#24D3EE,#7A5CFF);
  background-size:170% 100%;
  box-shadow:0 0 24px rgba(36,211,238,.35);
}
.btn-glow:hover{color:#04121B;transform:translateY(-2px);background-position:100% 0;box-shadow:0 0 34px rgba(36,211,238,.5);}
.btn-glow:active{transform:translateY(1px);}
.btn-ghost{
  color:var(--text);border-color:rgba(36,211,238,.45);background:rgba(36,211,238,.04);
}
.btn-ghost:hover{color:var(--primary);border-color:var(--primary);background:rgba(36,211,238,.1);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-line{color:var(--primary);padding:0 4px;min-height:auto;background:none;}
.btn-line:hover{color:var(--secondary);}
.btn-line i{transition:transform .22s ease;}
.btn-line:hover i{transform:translateX(4px);}
.btn-sm{min-height:38px;padding:0 18px;font-size:13px;}
.btn-block{width:100%;}

/* ---------- 徽章 / 标签 ---------- */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:8px;font-size:12px;letter-spacing:.5px;
  background:rgba(36,211,238,.12);color:var(--primary);border:1px solid rgba(36,211,238,.24);
}
.badge-accent{background:rgba(198,255,74,.12);color:var(--accent);border-color:rgba(198,255,74,.3);}
.badge-mute{background:rgba(120,160,220,.1);color:var(--text-2);border-color:var(--line);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  height:72px;display:flex;align-items:center;
  background:rgba(7,11,24,.55);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:height .25s ease,background .25s ease,border-color .25s ease;
}
.site-header.scrolled{height:64px;background:rgba(7,11,24,.88);border-bottom-color:var(--divider);}
.nav-wrap{display:flex;align-items:center;gap:18px;width:100%;}
.brand{display:flex;align-items:center;gap:11px;color:var(--text);flex:0 0 auto;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 38px;
  background:var(--grad);display:grid;place-items:center;
  box-shadow:0 0 18px rgba(36,211,238,.32);
  color:#04121B;font-size:17px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-main{font-size:16px;font-weight:800;letter-spacing:.2px;white-space:nowrap;}
.brand-sub{font-size:11px;color:var(--text-2);letter-spacing:1.6px;}
.nav-capsules{display:flex;align-items:center;gap:2px;flex:1 1 auto;justify-content:center;flex-wrap:nowrap;}
.nav-pill{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  padding:9px 13px;border-radius:999px;font-size:13.5px;color:var(--text-2);white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-pill i{font-size:12.5px;opacity:.9;}
.nav-pill::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .24s ease;
}
.nav-pill:hover{color:var(--text);background:rgba(36,211,238,.07);}
.nav-pill:hover::after{transform:scaleX(1);}
.nav-pill.active{color:var(--text);background:rgba(36,211,238,.13);}
.nav-pill.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:rgba(18,28,50,.6);color:var(--text);font-size:16px;
}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:1060;
  background:rgba(11,18,36,.97);backdrop-filter:blur(16px);
  border-left:1px solid var(--line);padding:22px 20px 96px;
  transform:translateX(102%);transition:transform .28s ease;overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-mask{position:fixed;inset:0;background:rgba(4,7,16,.6);z-index:1055;opacity:0;pointer-events:none;transition:opacity .28s ease;}
.drawer-mask.open{opacity:1;pointer-events:auto;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-close{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:transparent;color:var(--text);}
.drawer-list{display:flex;flex-direction:column;gap:6px;}
.drawer-list a{
  display:flex;align-items:center;gap:10px;padding:13px 14px;border-radius:12px;
  color:var(--text-2);font-size:14.5px;border:1px solid transparent;
}
.drawer-list a:hover,.drawer-list a.active{color:var(--text);background:rgba(36,211,238,.1);border-color:rgba(36,211,238,.22);}
.drawer-foot{position:absolute;left:20px;right:20px;bottom:20px;}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(48px,7vw,96px) 0 clamp(52px,7vw,84px);}
.hero-bg{position:absolute;inset:0;background:url(/assets/images/backpic/back-1.webp) center/cover no-repeat;opacity:.3;}
.hero-grid-lines{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,160,220,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(120,160,220,.055) 1px,transparent 1px);
  background-size:24px 24px;
}
.hero-glow{position:absolute;top:-140px;right:-100px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(36,211,238,.22),transparent 66%);filter:blur(6px);}
.hero-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,24,.76),rgba(7,11,24,.93) 62%,#070B18);}
.hero-inner{position:relative;z-index:2;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:20px;
  padding:6px 14px;border-radius:999px;font-size:12.5px;letter-spacing:.6px;
  background:rgba(36,211,238,.1);border:1px solid rgba(36,211,238,.26);color:var(--primary);
}
.hero h1{
  font-size:clamp(30px,5vw,52px);font-weight:800;letter-spacing:-.5px;line-height:1.22;margin-bottom:18px;
}
.hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:16px;color:var(--text-2);max-width:560px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px;}
.hero-points{display:flex;flex-wrap:wrap;gap:12px 26px;}
.hero-points span{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-2);}
.hero-points i{color:var(--primary);font-size:12px;}

.promo-card{
  position:relative;border-radius:var(--radius-glass);padding:26px 24px;
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(120,160,220,.18);
  box-shadow:var(--shadow-card),var(--inset);
}
.promo-card::before{
  content:"";position:absolute;left:24px;right:24px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(36,211,238,.7),transparent);
}
.promo-label{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.promo-clock{display:flex;align-items:baseline;gap:4px;margin-bottom:16px;}
.promo-clock .val{
  font-variant-numeric:tabular-nums;font-size:26px;font-weight:800;color:var(--primary);
  text-shadow:0 0 18px rgba(36,211,238,.45);
}
.promo-clock .sep{font-size:22px;color:rgba(36,211,238,.6);font-weight:800;}
.promo-clock .unit{font-size:12px;color:var(--text-2);margin-left:10px;letter-spacing:.5px;}
.promo-num{display:flex;align-items:flex-end;gap:10px;padding:16px 0 12px;border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);}
.promo-num b{font-size:52px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;color:var(--accent);text-shadow:0 0 22px rgba(198,255,74,.28);}
.promo-num em{font-style:normal;font-size:13px;color:var(--text-2);padding-bottom:6px;}
.promo-card .btn-line{margin-top:16px;}

/* ---------- 板块通用 ---------- */
.section{padding:clamp(56px,7vw,96px) 0;}
.section-tight{padding:clamp(44px,5vw,64px) 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.sec-title{font-size:clamp(22px,2.6vw,32px);display:flex;align-items:center;font-weight:700;}
.sec-title::before{
  content:"";width:4px;height:22px;border-radius:2px;margin-right:12px;
  background:linear-gradient(180deg,#24D3EE,#7A5CFF);
}
.sec-desc{font-size:14.5px;color:var(--text-2);margin-top:10px;max-width:660px;}
.sec-rule{flex:1 1 auto;height:1px;margin:0 4px 14px;background:repeating-linear-gradient(90deg,rgba(120,160,220,.22) 0 6px,transparent 6px 12px);opacity:.55;}
.sec-link{font-size:14px;color:var(--primary);white-space:nowrap;padding-bottom:12px;}
.sec-link:hover{color:var(--secondary);}

/* ---------- 优惠阶梯 ---------- */
.ladder{display:flex;flex-direction:column;gap:16px;}
.ladder-row{
  display:flex;align-items:center;gap:22px;flex-wrap:wrap;
  margin-left:calc(var(--step) * 34px);
  padding:22px 26px;border-radius:var(--radius-card);
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
  border:1px solid var(--line);
  box-shadow:0 12px 34px rgba(0,0,0,.32);
  position:relative;overflow:hidden;
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.ladder-row::before{content:"";position:absolute;left:0;top:0;height:100%;width:3px;background:var(--grad);opacity:.7;}
.ladder-row:hover{transform:translateY(-3px);border-color:rgba(36,211,238,.45);box-shadow:0 18px 48px rgba(0,0,0,.45);}
.ladder-row.top{border-color:rgba(198,255,74,.45);box-shadow:0 0 30px rgba(198,255,74,.14),0 18px 48px rgba(0,0,0,.45);}
.ladder-rank{
  flex:0 0 62px;font-size:30px;font-weight:800;font-variant-numeric:tabular-nums;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;
}
.ladder-main{flex:1 1 260px;min-width:220px;}
.ladder-main h3{font-size:18px;margin-bottom:6px;}
.ladder-main p{font-size:13.5px;color:var(--text-2);}
.ladder-perks{flex:1 1 320px;display:flex;flex-wrap:wrap;gap:8px;}
.ladder-perks span{
  font-size:12.5px;color:var(--text-2);padding:4px 10px;border-radius:8px;
  background:rgba(120,160,220,.08);border:1px solid var(--line);
}
.ladder-cta{flex:0 0 auto;}

/* ---------- 方案对比 ---------- */
.plan-scroll{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.plan-col{
  position:relative;padding:28px 24px;border-radius:var(--radius-card);
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
  border:1px solid var(--line);box-shadow:0 14px 40px rgba(0,0,0,.35);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.plan-col:hover{transform:translateY(-4px);border-color:rgba(36,211,238,.45);}
.plan-col.recommend{
  transform:translateY(-8px);border-color:rgba(198,255,74,.5);
  box-shadow:0 0 28px rgba(198,255,74,.12),0 20px 50px rgba(0,0,0,.45);
}
.plan-col.recommend:hover{transform:translateY(-12px);}
.plan-col.recommend::before{
  content:"";position:absolute;left:24px;right:24px;top:-1px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,#C6FF4A,#24D3EE);box-shadow:0 0 18px rgba(198,255,74,.5);
}
.plan-name{font-size:17px;font-weight:700;margin-bottom:6px;}
.plan-tag{font-size:13px;color:var(--text-2);margin-bottom:18px;min-height:44px;}
.plan-price{display:flex;align-items:baseline;gap:6px;margin-bottom:20px;}
.plan-price b{font-size:38px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1;color:var(--text);}
.plan-price span{font-size:13px;color:var(--text-2);}
.plan-list{display:flex;flex-direction:column;gap:11px;margin-bottom:24px;}
.plan-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);}
.plan-list i{color:var(--primary);font-size:12px;margin-top:7px;}

/* ---------- 资讯卡片 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--radius-card);background:linear-gradient(180deg,var(--panel-2),var(--panel));
  border:1px solid var(--line);box-shadow:0 14px 38px rgba(0,0,0,.34);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease,background .24s ease;
}
.news-card::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:var(--grad);opacity:.55;transition:opacity .24s ease;}
.news-card:hover{transform:translateY(-4px);border-color:rgba(36,211,238,.45);background:var(--glass);backdrop-filter:blur(14px);box-shadow:0 20px 50px rgba(0,0,0,.5);}
.news-card:hover::before{opacity:1;}
.news-cover{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;border-radius:var(--radius-img);margin:14px 14px 0;}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.news-card:hover .news-cover img{transform:scale(1.04);}
.news-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,24,.05),rgba(7,11,24,.72));}
.news-cover .badge-soft{position:absolute;left:12px;top:12px;z-index:2;background:rgba(11,18,36,.78);}
.news-body{padding:16px 18px 20px;display:flex;flex-direction:column;flex:1 1 auto;}
.news-title{font-size:16.5px;font-weight:700;line-height:1.5;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-title a{color:var(--text);}
.news-title a:hover{color:var(--primary);}
.news-desc{font-size:13.5px;color:var(--text-2);margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;
  padding-top:13px;border-top:1px solid var(--divider);font-size:12.5px;color:var(--text-2);}
.news-link{font-size:13px;color:var(--primary);display:inline-flex;align-items:center;gap:6px;}
.news-link i{font-size:11px;transition:transform .2s ease;}
.news-link:hover i{transform:translateX(3px);}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:64px 24px;border-radius:var(--radius-card);border:1px dashed var(--line);
  background:rgba(11,18,36,.6);text-align:center;
}
.empty-state i{font-size:26px;color:var(--text-2);}
.empty-state p{color:var(--text-2);font-size:14px;}

/* ---------- 限时入口条 ---------- */
.strip{
  display:flex;align-items:center;gap:26px;flex-wrap:wrap;
  padding:22px 28px;border-radius:var(--radius-card);
  background:linear-gradient(120deg,rgba(36,211,238,.1),rgba(122,92,255,.1));
  border:1px solid rgba(36,211,238,.28);
  box-shadow:0 0 30px rgba(36,211,238,.08);
}
.strip-clock{display:flex;align-items:baseline;gap:4px;}
.strip-clock b{font-size:30px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--accent);text-shadow:0 0 18px rgba(198,255,74,.3);}
.strip-clock .sep{font-size:24px;font-weight:800;color:rgba(198,255,74,.6);}
.strip-text{flex:1 1 280px;font-size:14.5px;color:var(--text-2);}
.strip-text strong{color:var(--text);font-weight:700;}

/* ---------- 表单 ---------- */
.consult-panel{
  border-radius:var(--radius-glass);padding:28px;
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(120,160,220,.18);box-shadow:var(--shadow-card),var(--inset);
}
.side-card{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);}
.side-card img{width:100%;height:200px;object-fit:cover;}
.side-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,24,.15),rgba(7,11,24,.85));}
.side-card-txt{position:absolute;left:18px;right:18px;bottom:16px;z-index:2;font-size:13px;color:var(--text-2);}
.trust-list{display:flex;flex-direction:column;gap:14px;margin:22px 0;}
.trust-list li{display:flex;gap:12px;font-size:14px;color:var(--text-2);}
.trust-list i{color:var(--primary);margin-top:6px;font-size:12px;}
.trust-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;
  background:rgba(36,211,238,.1);border:1px solid rgba(36,211,238,.26);color:var(--primary);font-size:12.5px;}
.form-label{font-size:13.5px;color:var(--text-2);margin-bottom:7px;}
.form-control,.form-select{
  background:rgba(7,11,24,.72);border:1px solid var(--line);color:var(--text);
  border-radius:12px;min-height:48px;font-size:14px;padding:12px 14px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.form-control::placeholder{color:rgba(147,163,189,.6);}
.form-control:focus,.form-select:focus{
  background:rgba(7,11,24,.9);border-color:var(--primary);color:var(--text);
  box-shadow:0 0 0 3px rgba(36,211,238,.14);outline:none;
}
.form-select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#93A3BD 50%),linear-gradient(135deg,#93A3BD 50%,transparent 50%);
  background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;}
textarea.form-control{min-height:112px;resize:vertical;}
.form-check-input{width:18px;height:18px;background-color:transparent;border:1px solid rgba(120,160,220,.4);margin-top:4px;border-radius:5px;}
.form-check-input:checked{background-color:var(--primary);border-color:var(--primary);}
.form-check-input:focus{box-shadow:0 0 0 3px rgba(36,211,238,.16);border-color:var(--primary);}
.form-check-label{font-size:13px;color:var(--text-2);}
.form-note{font-size:12px;color:var(--text-2);margin-top:12px;}
.form-alert{display:none;margin-top:16px;padding:12px 16px;border-radius:12px;font-size:13.5px;
  background:rgba(36,211,238,.1);border:1px solid rgba(36,211,238,.3);color:var(--primary);}
.form-alert.show{display:block;}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  border-radius:var(--radius-card);border:1px solid var(--line);
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
  overflow:hidden;transition:border-color .22s ease;
}
.faq-item.open{border-color:rgba(36,211,238,.42);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;color:var(--text);
  font-size:15.5px;font-weight:700;text-align:left;cursor:pointer;
}
.faq-icon{position:relative;width:20px;height:20px;flex:0 0 20px;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .22s ease,opacity .22s ease;
}
.faq-icon::before{left:0;right:0;top:9px;height:2px;}
.faq-icon::after{top:0;bottom:0;left:9px;width:2px;}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease;}
.faq-a-inner{padding:0 22px 22px;font-size:14px;color:var(--text-2);max-width:900px;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;background:#050813;border-top:1px solid var(--divider);padding:64px 0 0;margin-top:20px;
}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:var(--grad);opacity:.35;}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.foot-desc{font-size:13.5px;color:var(--text-2);max-width:330px;margin-bottom:14px;}
.foot-kw{font-size:13px;color:var(--primary);letter-spacing:.4px;}
.foot-title{font-size:14.5px;font-weight:700;margin-bottom:16px;}
.foot-links{display:flex;flex-direction:column;gap:11px;}
.foot-links a{font-size:13.5px;color:var(--text-2);}
.foot-links a:hover{color:var(--primary);}
.foot-links span{font-size:13.5px;color:var(--text-2);}
.foot-bottom{
  margin-top:52px;border-top:1px dashed var(--divider);padding:22px 0 30px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--text-2);
}
.foot-diamond{display:flex;gap:8px;align-items:center;}
.foot-diamond i{font-size:5px;color:rgba(120,160,220,.4);}
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:1030;width:46px;height:46px;border-radius:14px;
  display:grid;place-items:center;border:1px solid rgba(36,211,238,.35);
  background:rgba(11,18,36,.85);color:var(--primary);cursor:pointer;
  opacity:0;pointer-events:none;transition:opacity .24s ease,transform .24s ease;
}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{transform:translateY(-3px);box-shadow:0 0 22px rgba(36,211,238,.3);}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .nav-capsules{gap:0;}
  .nav-pill{padding:8px 10px;font-size:13px;}
}
@media (max-width:991.98px){
  .nav-capsules,.nav-actions .btn-ghost{display:none;}
  .nav-toggle{display:grid;place-items:center;}
  .brand-sub{display:none;}
  .hero{padding-top:40px;}
  .hero h1{font-size:clamp(28px,7vw,40px);}
  .ladder-row{margin-left:0;}
  .plan-scroll{grid-template-columns:1fr 1fr;}
  .plan-col.recommend{transform:none;}
  .plan-col.recommend:hover{transform:translateY(-4px);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .section{padding:72px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .sec-rule{display:none;}
  .sec-link{padding-bottom:0;}
}
@media (max-width:767.98px){
  .plan-scroll{
    display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:16px;
    padding-bottom:10px;margin:0 -24px;padding-left:24px;padding-right:24px;
  }
  .plan-col{flex:0 0 82%;scroll-snap-align:center;}
  .strip{flex-direction:column;align-items:center;text-align:center;gap:16px;}
  .strip .btn-glow{width:100%;}
  .ladder-row{padding:20px;gap:16px;}
  .ladder-rank{flex:0 0 46px;font-size:24px;}
  .ladder-perks{flex:1 1 100%;}
  .ladder-cta{width:100%;}
  .ladder-cta .btn-ghost{width:100%;}
}
@media (max-width:575.98px){
  body{font-size:14.5px;}
  .news-grid{grid-template-columns:1fr;}
  .hero-actions .btn-glow,.hero-actions .btn-ghost{width:100%;}
  .promo-num b{font-size:42px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:18px;}
  .section{padding:56px 0;}
}

/* roulang page: article */
:root{
  --bg:#070B18;
  --bg-deep:#050813;
  --panel:#0B1224;
  --glass:rgba(18,28,50,0.55);
  --primary:#24D3EE;
  --violet:#7A5CFF;
  --lime:#C6FF4A;
  --warn:#FF6A3D;
  --text:#E8EEF9;
  --muted:#93A3BD;
  --line:rgba(120,160,220,0.14);
  --divider:rgba(120,160,220,0.10);
  --grad:linear-gradient(120deg,#24D3EE,#7A5CFF);
  --grad-soft:linear-gradient(120deg,rgba(36,211,238,0.16),rgba(122,92,255,0.16));
  --glow:0 0 24px rgba(36,211,238,0.35);
  --glow-strong:0 0 34px rgba(36,211,238,0.55);
  --shadow-card:0 18px 48px rgba(0,0,0,0.45);
  --r-card:18px;
  --r-glass:20px;
  --r-img:14px;
  --r-btn:999px;
  --r-input:12px;
  --r-badge:8px;
  --sec-lg:104px;
  --sec-md:72px;
  --sec-sm:56px;
  --bs-body-bg:#070B18;
  --bs-body-color:#E8EEF9;
  --bs-primary:#24D3EE;
  --bs-primary-rgb:36,211,238;
  --bs-link-color:#24D3EE;
  --bs-link-hover-color:#7A5CFF;
  --bs-border-color:rgba(120,160,220,0.14);
  --bs-border-radius:14px;
  --bs-border-radius-lg:18px;
  --bs-border-radius-sm:10px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .22s ease,opacity .22s ease;}
a:hover{color:var(--violet);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:-0.2px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
.container{max-width:1200px;padding-left:24px;padding-right:24px;}
.num{font-variant-numeric:tabular-nums;}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:1000;
  height:72px;
  display:flex;
  align-items:center;
  background:linear-gradient(180deg,rgba(7,11,24,0.92),rgba(7,11,24,0.35));
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:height .24s ease,background .24s ease,border-color .24s ease;
}
.site-header.scrolled{
  height:64px;
  background:rgba(7,11,24,0.92);
  border-bottom-color:var(--divider);
  box-shadow:0 12px 34px rgba(0,0,0,0.40);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:42px;height:42px;border-radius:13px;
  display:grid;place-items:center;
  background:var(--grad);
  color:#04121b;
  font-size:18px;
  box-shadow:var(--glow);
  flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-main{font-size:17px;font-weight:800;color:var(--text);letter-spacing:-0.3px;white-space:nowrap;}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:1px;}
.nav-capsules{display:flex;align-items:center;gap:6px;flex-wrap:nowrap;}
.nav-pill{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 14px;
  border-radius:var(--r-btn);
  font-size:14px;
  color:var(--muted);
  border:1px solid transparent;
  transition:all .22s ease;
  white-space:nowrap;
}
.nav-pill i{font-size:12px;opacity:.85;}
.nav-pill::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  background:var(--grad);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .24s ease;
}
.nav-pill:hover{color:var(--text);background:rgba(36,211,238,0.07);}
.nav-pill:hover::after{transform:scaleX(1);}
.nav-pill.active{
  color:var(--text);
  background:rgba(36,211,238,0.13);
  border-color:rgba(36,211,238,0.28);
}
.nav-pill.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.btn-glow,.btn-ghost,.btn-lime{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;
  border-radius:var(--r-btn);
  font-size:14px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .24s ease,background .24s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-sm{min-height:38px;padding:0 16px;font-size:13px;}
.btn-glow{
  background:var(--grad);
  color:#04121b;
  box-shadow:var(--glow);
}
.btn-glow:hover{transform:translateY(-2px);box-shadow:var(--glow-strong);color:#04121b;}
.btn-glow:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  color:var(--primary);
  border-color:rgba(36,211,238,0.45);
}
.btn-ghost:hover{background:rgba(36,211,238,0.10);color:var(--text);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-lime{
  background:var(--lime);
  color:#101d05;
  box-shadow:0 0 22px rgba(198,255,74,0.30);
}
.btn-lime:hover{transform:translateY(-2px);box-shadow:0 0 32px rgba(198,255,74,0.50);color:#101d05;}
.nav-toggle{
  display:none;
  width:44px;height:44px;border-radius:12px;
  background:rgba(18,28,50,0.75);
  border:1px solid var(--line);
  color:var(--text);
  font-size:17px;
}
.nav-toggle:hover{border-color:rgba(36,211,238,0.45);}

/* ============ 面包屑 ============ */
.crumb-bar{
  padding-top:104px;
  padding-bottom:18px;
}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb i{font-size:9px;opacity:.6;}
.crumb .now{color:var(--text);font-weight:600;}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;
  padding:26px 0 40px;
  background-image:
    linear-gradient(180deg,rgba(7,11,24,0.86),rgba(7,11,24,0.97)),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--divider);
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,160,220,0.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,160,220,0.05) 1px,transparent 1px);
  background-size:24px 24px;
  mask-image:radial-gradient(circle at 78% 18%,#000 0%,transparent 62%);
}
.article-hero .container{position:relative;z-index:2;}
.cat-badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;
  border-radius:var(--r-badge);
  background:rgba(36,211,238,0.12);
  border:1px solid rgba(36,211,238,0.30);
  color:var(--primary);
  font-size:12px;letter-spacing:.6px;
}
.article-h1{
  margin:20px 0 18px;
  font-size:clamp(26px,3.6vw,42px);
  font-weight:800;
  line-height:1.35;
  letter-spacing:-0.5px;
  max-width:940px;
}
.article-meta{
  display:flex;flex-wrap:wrap;gap:22px;
  font-size:13px;color:var(--muted);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--primary);opacity:.85;font-size:12px;}

/* ============ 正文区 ============ */
.article-main{padding:64px 0 96px;}
.article-body{
  max-width:820px;
  margin:0 auto;
  font-size:16px;
  line-height:1.9;
  color:#DCE6F5;
}
.article-body>*+*{margin-top:1.2em;}
.article-body p{margin:1.2em 0 0;}
.article-body h2{
  position:relative;
  margin-top:2.1em;
  padding-left:20px;
  font-size:clamp(21px,2.4vw,28px);
  font-weight:700;
  line-height:1.5;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.32em;
  width:4px;height:20px;border-radius:2px;
  background:var(--grad);
  box-shadow:var(--glow);
}
.article-body h3{
  margin-top:1.8em;
  font-size:21px;font-weight:600;
}
.article-body strong{color:#fff;font-weight:700;}
.article-body ul,.article-body ol{
  margin:1.2em 0 0;
  padding-left:6px;
}
.article-body ul li,.article-body ol li{
  position:relative;
  padding-left:22px;
  margin:.55em 0;
  list-style:none;
}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:7px;height:7px;border-radius:2px;
  background:var(--grad);
}
.article-body ol{counter-reset:agnum;}
.article-body ol li{counter-increment:agnum;}
.article-body ol li::before{
  content:counter(agnum);
  position:absolute;left:0;top:.15em;
  width:18px;height:18px;
  display:grid;place-items:center;
  font-size:11px;font-weight:700;
  color:#04121b;
  background:var(--primary);
  border-radius:6px;
  font-variant-numeric:tabular-nums;
}
.article-body blockquote{
  margin:1.6em 0;
  padding:16px 20px;
  border-left:3px solid var(--primary);
  background:rgba(36,211,238,0.07);
  border-radius:0 14px 14px 0;
  color:#CBD9EC;
}
.article-body blockquote p{margin:0;}
.article-body img{
  width:100%;
  border-radius:var(--r-img);
  margin:1.6em 0 .6em;
  box-shadow:var(--shadow-card);
}
.article-body table{
  width:100%;
  margin:1.6em 0;
  border-collapse:separate;
  border-spacing:0;
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  font-size:14.5px;
}
.article-body th,.article-body td{
  padding:12px 14px;
  border-bottom:1px solid var(--divider);
  text-align:left;
}
.article-body th{background:rgba(36,211,238,0.10);color:#fff;font-weight:600;}
.article-body tbody tr:nth-child(even) td{background:rgba(255,255,255,0.02);}
.article-body tbody tr:last-child td{border-bottom:none;}
.article-body code{
  padding:2px 7px;
  border-radius:6px;
  background:rgba(122,92,255,0.16);
  color:#CBD9FF;
  font-size:14px;
}
.article-body hr{
  border:none;height:1px;
  background:var(--divider);
  margin:2em 0;
}

/* 空态 */
.empty-state{
  max-width:760px;
  margin:0 auto;
  padding:56px 28px;
  text-align:center;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
}
.empty-state .empty-ico{
  width:64px;height:64px;margin:0 auto 18px;
  border-radius:18px;
  display:grid;place-items:center;
  background:var(--grad-soft);
  border:1px solid rgba(36,211,238,0.28);
  color:var(--primary);
  font-size:24px;
}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--muted);font-size:14.5px;margin-bottom:22px;}

/* 标签与分享 */
.article-foot{
  max-width:820px;
  margin:52px auto 0;
  padding-top:26px;
  border-top:1px solid var(--divider);
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  align-items:center;
  justify-content:space-between;
}
.tag-row{display:flex;flex-wrap:wrap;gap:9px;}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 13px;
  border-radius:var(--r-badge);
  font-size:12.5px;
  color:var(--muted);
  background:rgba(120,160,220,0.07);
  border:1px solid var(--line);
  transition:all .22s ease;
}
.tag:hover{color:var(--primary);border-color:rgba(36,211,238,0.42);background:rgba(36,211,238,0.10);}
.share-row{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);}
.share-btn{
  width:38px;height:38px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line);
  color:var(--muted);
  background:rgba(18,28,50,0.6);
  transition:all .22s ease;
}
.share-btn:hover{color:var(--primary);border-color:rgba(36,211,238,0.45);transform:translateY(-2px);box-shadow:var(--glow);}

/* ============ 相关推荐 ============ */
.related-sec{
  padding:var(--sec-md) 0 0;
  border-top:1px solid var(--divider);
  margin-top:64px;
}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:30px;
}
.sec-title{
  position:relative;
  padding-left:16px;
  font-size:clamp(22px,2.6vw,30px);
  font-weight:700;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.28em;
  width:5px;height:22px;border-radius:3px;
  background:var(--grad);box-shadow:var(--glow);
}
.sec-sub{font-size:13.5px;color:var(--muted);margin-top:8px;padding-left:16px;}
.sec-more{font-size:13.5px;color:var(--muted);display:inline-flex;align-items:center;gap:7px;}
.sec-more:hover{color:var(--primary);}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.info-card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .24s ease,border-color .24s ease,background .24s ease,box-shadow .24s ease;
}
.info-card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:1px;
  background:var(--grad);opacity:.5;transition:opacity .24s ease;
}
.info-card:hover{
  transform:translateY(-4px);
  border-color:rgba(36,211,238,0.45);
  box-shadow:0 24px 56px rgba(0,0,0,0.55),0 0 0 1px rgba(36,211,238,0.14) inset;
}
.info-card:hover::before{opacity:1;}
.info-card figure{
  position:relative;margin:0;aspect-ratio:16/9;overflow:hidden;
}
.info-card figure img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .5s ease;
}
.info-card:hover figure img{transform:scale(1.05);}
.info-card figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,24,0.10),rgba(7,11,24,0.78));
}
.card-body-inner{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.badge-soft{
  align-self:flex-start;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;
  border-radius:var(--r-badge);
  font-size:11.5px;letter-spacing:.5px;
  color:var(--primary);
  background:rgba(36,211,238,0.12);
  border:1px solid rgba(36,211,238,0.26);
}
.card-title{
  font-size:16.5px;
  font-weight:600;
  line-height:1.55;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-title a{color:var(--text);}
.card-title a:hover{color:var(--primary);}
.card-desc{
  font-size:13.5px;
  color:var(--muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-meta{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--divider);
  display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--muted);
}
.card-meta a{display:inline-flex;align-items:center;gap:6px;color:var(--primary);}
.card-meta a:hover{color:var(--violet);}

/* 返回列表 */
.back-row{display:flex;justify-content:center;margin-top:52px;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  margin-top:var(--sec-lg);
  padding:72px 0 34px;
  background:var(--bg-deep);
  border-top:1px solid var(--divider);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:var(--grad);opacity:.6;
}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.site-footer .brand-mark{
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  background:var(--grad);color:#04121b;font-size:17px;
  box-shadow:var(--glow);flex:0 0 auto;
}
.site-footer .brand-text{display:flex;flex-direction:column;line-height:1.3;}
.site-footer .brand-main{font-size:16px;font-weight:800;color:var(--text);}
.site-footer .brand-sub{font-size:11px;color:var(--muted);letter-spacing:1px;}
.foot-desc{font-size:13.5px;color:var(--muted);line-height:1.85;margin-bottom:12px;}
.foot-kw{font-size:12.5px;color:rgba(147,163,189,0.75);letter-spacing:.4px;}
.foot-title{
  font-size:14px;font-weight:700;color:var(--text);
  margin-bottom:16px;position:relative;padding-left:12px;
}
.foot-title::before{
  content:"";position:absolute;left:0;top:.35em;
  width:3px;height:14px;border-radius:2px;background:var(--grad);
}
.foot-links{display:flex;flex-direction:column;gap:10px;}
.foot-links a,.foot-links span{font-size:13.5px;color:var(--muted);}
.foot-links a{position:relative;display:inline-block;}
.foot-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:1px;width:0;
  background:var(--primary);transition:width .24s ease;
}
.foot-links a:hover{color:var(--primary);}
.foot-links a:hover::after{width:100%;}
.foot-bottom{
  margin-top:52px;
  padding-top:22px;
  border-top:1px solid var(--divider);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:12.5px;color:rgba(147,163,189,0.8);
}
.foot-diamond{display:inline-flex;gap:7px;color:var(--primary);font-size:7px;opacity:.55;}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:26px;z-index:900;
  width:48px;height:48px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--grad);color:#04121b;font-size:16px;
  box-shadow:var(--glow);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .26s ease;
  border:none;cursor:pointer;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{box-shadow:var(--glow-strong);}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .nav-pill{padding:8px 10px;font-size:13px;}
  .nav-pill span{max-width:96px;overflow:hidden;text-overflow:ellipsis;}
}
@media (max-width:991px){
  .nav-capsules{
    position:fixed;top:0;right:0;bottom:0;
    width:min(320px,86vw);
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    padding:96px 20px 24px;
    background:rgba(9,15,30,0.98);
    backdrop-filter:blur(16px);
    border-left:1px solid var(--line);
    transform:translateX(102%);
    transition:transform .28s ease;
    overflow-y:auto;
    z-index:1001;
  }
  .site-header.nav-open .nav-capsules{transform:translateX(0);}
  .nav-pill{justify-content:flex-start;font-size:14.5px;padding:12px 16px;}
  .nav-pill span{max-width:none;}
  .nav-pill::after{display:none;}
  .nav-toggle{display:grid;place-items:center;}
  .nav-actions .btn-ghost{display:none;}
  .article-main{padding:48px 0 72px;}
  .related-sec{padding-top:var(--sec-sm);}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .crumb-bar{padding-top:92px;}
}
@media (max-width:767px){
  .container{padding-left:16px;padding-right:16px;}
  .brand-sub{display:none;}
  .brand-main{font-size:15px;}
  .article-hero{padding:16px 0 30px;}
  .article-meta{gap:14px;font-size:12.5px;}
  .article-body{font-size:15.5px;}
  .article-body h2{font-size:20px;padding-left:16px;}
  .article-body h2::before{height:17px;}
  .card-grid{grid-template-columns:1fr;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
  .site-footer{padding:56px 0 26px;margin-top:var(--sec-sm);}
  .to-top{right:16px;bottom:18px;width:44px;height:44px;}
}
@media (max-width:575px){
  .article-meta span{width:100%;}
  .btn-glow,.btn-ghost{width:100%;}
  .nav-actions .btn-glow{min-height:38px;padding:0 14px;width:auto;}
}

/* roulang page: category1 */
:root{
    --bg:#070B18;
    --panel:#0B1224;
    --panel-2:#0E1730;
    --glass:rgba(18,28,50,.55);
    --primary:#24D3EE;
    --secondary:#7A5CFF;
    --accent:#C6FF4A;
    --warn:#FF6A3D;
    --text:#E8EEF9;
    --muted:#93A3BD;
    --line:rgba(120,160,220,.14);
    --divider:rgba(120,160,220,.10);
    --grad:linear-gradient(120deg,#24D3EE,#7A5CFF);
    --glow:0 0 24px rgba(36,211,238,.35);
    --r-card:18px;
    --r-glass:20px;
    --r-img:14px;
    --r-input:12px;
    --r-badge:8px;
    --shadow-card:0 18px 48px rgba(0,0,0,.45);
    --bs-body-bg:#070B18;
    --bs-body-color:#E8EEF9;
    --bs-primary:#24D3EE;
    --bs-primary-rgb:36,211,238;
    --bs-link-color:#24D3EE;
    --bs-link-hover-color:#7A5CFF;
    --bs-border-color:rgba(120,160,220,.14);
    --bs-border-radius:14px;
    --bs-border-radius-lg:18px;
    --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  }

  *,*::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","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    background:
      radial-gradient(720px 420px at 84% -6%, rgba(36,211,238,.16), transparent 62%),
      radial-gradient(680px 460px at 6% 22%, rgba(122,92,255,.13), transparent 66%);
    pointer-events:none;
    z-index:0;
  }
  img{max-width:100%;display:block;}
  a{color:var(--primary);text-decoration:none;transition:color .22s ease;}
  a:hover{color:var(--secondary);}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4{color:var(--text);font-weight:700;letter-spacing:-.3px;margin:0;}
  p{margin:0 0 1em;}
  button{font-family:inherit;}
  :focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}

  .container{max-width:1200px;padding-left:24px;padding-right:24px;position:relative;z-index:1;}

  /* ============ HEADER ============ */
  .site-header{
    position:sticky;
    top:0;
    z-index:1000;
    background:transparent;
    border-bottom:1px solid transparent;
    transition:background .26s ease,border-color .26s ease,backdrop-filter .26s ease,height .26s ease;
  }
  .site-header.scrolled{
    background:rgba(7,11,24,.86);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--divider);
  }
  .nav-wrap{
    display:flex;
    align-items:center;
    gap:18px;
    height:72px;
    transition:height .26s ease;
  }
  .site-header.scrolled .nav-wrap{height:64px;}
  .brand{
    display:flex;
    align-items:center;
    gap:10px;
    flex:0 0 auto;
    color:var(--text);
  }
  .brand:hover{color:var(--text);}
  .brand-mark{
    width:38px;height:38px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:12px;
    background:var(--grad);
    color:#04101c;
    font-size:17px;
    box-shadow:var(--glow);
    flex:0 0 auto;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.2;}
  .brand-main{font-size:16px;font-weight:800;letter-spacing:-.2px;white-space:nowrap;}
  .brand-sub{font-size:11px;color:var(--muted);letter-spacing:.5px;white-space:nowrap;}

  .nav-capsules{
    display:flex;
    align-items:center;
    gap:6px;
    margin-left:auto;
    flex-wrap:nowrap;
  }
  .nav-pill{
    position:relative;
    display:inline-flex;
    align-items:center;
    gap:7px;
    padding:9px 14px;
    border-radius:999px;
    font-size:14px;
    color:#C3CFE4;
    white-space:nowrap;
    transition:background .22s ease,color .22s ease,transform .22s ease;
  }
  .nav-pill i{font-size:12px;color:var(--primary);opacity:.9;}
  .nav-pill::after{
    content:"";
    position:absolute;
    left:14px;right:14px;bottom:4px;
    height:2px;
    border-radius:2px;
    background:var(--grad);
    transform:scaleX(0);
    transform-origin:left;
    transition:transform .24s ease;
  }
  .nav-pill:hover{background:rgba(36,211,238,.08);color:#fff;}
  .nav-pill:hover::after{transform:scaleX(1);}
  .nav-pill.active{
    background:rgba(36,211,238,.14);
    color:#fff;
    box-shadow:inset 0 0 0 1px rgba(36,211,238,.28);
  }
  .nav-pill.active::after{transform:scaleX(1);}

  .nav-actions{
    display:flex;
    align-items:center;
    gap:10px;
    flex:0 0 auto;
    margin-left:12px;
  }
  .btn-glow,
  .btn-ghost,
  .btn-soft{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:44px;
    padding:0 22px;
    border-radius:999px;
    font-size:14px;
    font-weight:700;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .2s ease,box-shadow .24s ease,background .24s ease,color .24s ease,border-color .24s ease;
    white-space:nowrap;
  }
  .btn-glow{
    background:var(--grad);
    color:#04101c;
    box-shadow:0 0 22px rgba(36,211,238,.30);
  }
  .btn-glow:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(36,211,238,.52);color:#04101c;}
  .btn-glow:active{transform:translateY(1px);}
  .btn-ghost{
    background:transparent;
    border-color:rgba(36,211,238,.5);
    color:var(--primary);
  }
  .btn-ghost:hover{background:rgba(36,211,238,.10);color:#fff;transform:translateY(-2px);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-soft{
    background:rgba(122,92,255,.14);
    border-color:rgba(122,92,255,.34);
    color:#CFC3FF;
  }
  .btn-soft:hover{background:rgba(122,92,255,.24);color:#fff;transform:translateY(-2px);}
  .btn-sm{min-height:40px;padding:0 18px;font-size:13.5px;}
  .btn-block{width:100%;}

  .nav-toggle{
    display:none;
    width:44px;height:44px;
    align-items:center;justify-content:center;
    border-radius:12px;
    background:rgba(36,211,238,.10);
    border:1px solid var(--line);
    color:var(--text);
    font-size:17px;
    cursor:pointer;
  }
  .nav-toggle:hover{background:rgba(36,211,238,.2);}

  /* ============ HERO ============ */
  .page-hero{
    position:relative;
    padding:70px 0 64px;
    background-image:linear-gradient(180deg,rgba(7,11,24,.86),rgba(7,11,24,.96)),url("/assets/images/backpic/back-2.webp");
    background-size:cover;
    background-position:center;
    overflow:hidden;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    inset:0;
    background-image:linear-gradient(rgba(120,160,220,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,160,220,.06) 1px,transparent 1px);
    background-size:24px 24px;
    opacity:.5;
    pointer-events:none;
  }
  .breadcrumb-line{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--muted);
    margin-bottom:20px;
  }
  .breadcrumb-line a{color:var(--muted);}
  .breadcrumb-line a:hover{color:var(--primary);}
  .breadcrumb-line .sep{opacity:.55;}
  .breadcrumb-line .current{color:var(--primary);font-weight:600;}

  .hero-grid{
    display:grid;
    grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
    gap:32px;
    align-items:center;
  }
  .hero-tag{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:6px 14px;
    border-radius:var(--r-badge);
    background:rgba(198,255,74,.10);
    border:1px solid rgba(198,255,74,.32);
    color:var(--accent);
    font-size:12px;
    letter-spacing:.5px;
    font-weight:600;
    margin-bottom:18px;
  }
  h1{
    font-size:clamp(30px,5vw,52px);
    font-weight:800;
    line-height:1.22;
    letter-spacing:-.5px;
    margin-bottom:16px;
  }
  h1 .hl{
    background:var(--grad);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
  }
  .hero-sub{
    font-size:16px;
    color:#B9C6DD;
    max-width:620px;
    margin-bottom:26px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px;}

  .stat-strip{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
  }
  .stat-chip{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:9px 16px;
    border-radius:999px;
    background:rgba(11,18,36,.72);
    border:1px solid var(--line);
    font-size:13px;
    color:#C3CFE4;
  }
  .stat-chip strong{
    font-variant-numeric:tabular-nums;
    color:var(--primary);
    font-size:14px;
  }

  .hero-side{
    background:var(--glass);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border:1px solid var(--line);
    border-top:1px solid rgba(255,255,255,.16);
    border-radius:var(--r-glass);
    padding:26px;
    box-shadow:var(--shadow-card);
  }
  .hero-side h2{
    font-size:17px;
    margin-bottom:14px;
  }
  .hero-side .side-num{
    font-size:44px;
    font-weight:800;
    line-height:1;
    font-variant-numeric:tabular-nums;
    background:var(--grad);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
    margin-bottom:6px;
  }
  .hero-side .side-cap{font-size:13px;color:var(--muted);margin-bottom:18px;}
  .side-list{display:flex;flex-direction:column;gap:12px;margin-bottom:20px;}
  .side-list li{
    display:flex;
    gap:10px;
    align-items:flex-start;
    font-size:14px;
    color:#C7D3E8;
    padding-bottom:12px;
    border-bottom:1px dashed var(--divider);
  }
  .side-list li:last-child{border-bottom:0;padding-bottom:0;}
  .side-list i{color:var(--primary);font-size:13px;margin-top:5px;}

  /* ============ SECTION BASE ============ */
  section{position:relative;z-index:1;}
  .sec-lg{padding:96px 0;}
  .sec-sm{padding:64px 0;}
  .sec-head{margin-bottom:38px;}
  .sec-head .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:12px;
    letter-spacing:1.4px;
    color:var(--primary);
    font-weight:700;
    margin-bottom:12px;
  }
  .sec-head .eyebrow::before{
    content:"";
    width:4px;height:16px;
    border-radius:2px;
    background:var(--grad);
    display:inline-block;
  }
  .sec-head h2{font-size:clamp(24px,3vw,34px);line-height:1.3;}
  .sec-head p{color:var(--muted);font-size:15px;margin-top:12px;max-width:760px;}
  .sec-rule{
    display:flex;
    align-items:center;
    gap:10px;
    margin-top:16px;
    opacity:.35;
  }
  .sec-rule span{
    height:1px;
    flex:0 0 120px;
    background:linear-gradient(90deg,var(--primary),transparent);
  }
  .sec-rule i{font-size:8px;color:var(--primary);}

  /* ============ 编号阶梯清单 ============ */
  .steps{display:flex;flex-direction:column;gap:18px;}
  .step-row{
    position:relative;
    display:grid;
    grid-template-columns:120px minmax(0,1fr) auto;
    gap:24px;
    align-items:center;
    padding:24px 26px;
    border-radius:var(--r-card);
    background:var(--panel);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
    transition:transform .24s ease,border-color .24s ease,background .24s ease;
  }
  .step-row::before{
    content:"";
    position:absolute;
    top:0;left:18px;right:18px;height:1px;
    background:linear-gradient(90deg,transparent,rgba(36,211,238,.7),transparent);
    opacity:.55;
    transition:opacity .24s ease;
  }
  .step-row:hover{transform:translateY(-4px);border-color:rgba(36,211,238,.45);}
  .step-row:hover::before{opacity:1;}
  .step-row:nth-child(1){margin-right:0;}
  .step-row:nth-child(2){margin-right:22px;}
  .step-row:nth-child(3){margin-right:44px;}
  .step-row:nth-child(4){margin-right:66px;}
  .step-row:nth-child(5){margin-right:88px;}
  .step-no{
    font-size:46px;
    font-weight:800;
    line-height:1;
    font-variant-numeric:tabular-nums;
    color:transparent;
    -webkit-text-stroke:1.4px rgba(36,211,238,.55);
    letter-spacing:-2px;
  }
  .step-row.is-top{
    border-color:rgba(198,255,74,.45);
    box-shadow:0 0 0 1px rgba(198,255,74,.18),0 18px 48px rgba(0,0,0,.45);
  }
  .step-row.is-top .step-no{-webkit-text-stroke:1.4px rgba(198,255,74,.75);}
  .step-row.is-top::before{background:linear-gradient(90deg,transparent,rgba(198,255,74,.85),transparent);opacity:.9;}
  .step-body h3{
    font-size:20px;
    margin-bottom:8px;
    display:flex;
    align-items:center;
    gap:10px;
    flex-wrap:wrap;
  }
  .step-body p{color:var(--muted);font-size:14.5px;margin-bottom:10px;}
  .step-notes{display:flex;flex-direction:column;gap:7px;}
  .step-notes li{
    position:relative;
    padding-left:18px;
    font-size:14px;
    color:#C0CDE3;
  }
  .step-notes li::before{
    content:"";
    position:absolute;
    left:0;top:11px;
    width:7px;height:7px;
    border-radius:2px;
    background:var(--grad);
    transform:rotate(45deg);
  }
  .step-cta{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:13.5px;
    font-weight:700;
    color:var(--primary);
    white-space:nowrap;
  }
  .step-cta:hover{gap:11px;color:var(--secondary);}
  .badge-lite{
    display:inline-flex;
    align-items:center;
    padding:3px 10px;
    border-radius:var(--r-badge);
    font-size:12px;
    letter-spacing:.5px;
    font-weight:600;
    background:rgba(36,211,238,.12);
    border:1px solid rgba(36,211,238,.3);
    color:var(--primary);
  }
  .badge-accent{
    background:rgba(198,255,74,.12);
    border-color:rgba(198,255,74,.36);
    color:var(--accent);
  }
  .badge-violet{
    background:rgba(122,92,255,.14);
    border-color:rgba(122,92,255,.38);
    color:#C7B9FF;
  }

  /* ============ 场景卡片 ============ */
  .scene-row{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:24px;
  }
  .scene-card{
    position:relative;
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
    box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
    transition:transform .24s ease,border-color .24s ease;
    display:flex;
    flex-direction:column;
  }
  .scene-card::before{
    content:"";
    position:absolute;
    top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(36,211,238,.75),transparent);
    opacity:.6;
    z-index:2;
  }
  .scene-card:hover{transform:translateY(-4px);border-color:rgba(36,211,238,.45);}
  .scene-thumb{
    position:relative;
    aspect-ratio:16/10;
    overflow:hidden;
  }
  .scene-thumb img{
    width:100%;height:100%;
    object-fit:cover;
    transition:transform .5s ease;
  }
  .scene-card:hover .scene-thumb img{transform:scale(1.05);}
  .scene-thumb::after{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(7,11,24,.12),rgba(7,11,24,.82));
  }
  .scene-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .scene-body h3{font-size:18px;}
  .scene-body p{font-size:14px;color:var(--muted);margin:0;line-height:1.8;}

  /* ============ 核对清单 ============ */
  .check-panel{
    background:var(--panel-2);
    border:1px solid var(--line);
    border-radius:var(--r-glass);
    padding:34px;
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:14px 32px;
  }
  .check-item{
    display:flex;
    gap:12px;
    align-items:flex-start;
    padding:12px 0;
    border-bottom:1px dashed var(--divider);
    font-size:14.5px;
    color:#C6D2E7;
  }
  .check-item i{
    color:var(--accent);
    font-size:14px;
    margin-top:6px;
    flex:0 0 auto;
  }
  .check-item strong{color:var(--text);font-weight:600;}

  /* ============ FAQ ============ */
  .faq-grid{
    display:grid;
    grid-template-columns:minmax(0,.85fr) minmax(0,1.35fr);
    gap:36px;
    align-items:start;
  }
  .faq-aside{
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:26px;
  }
  .faq-aside h3{font-size:19px;margin-bottom:12px;}
  .faq-aside p{font-size:14px;color:var(--muted);}
  .faq-aside .aside-num{
    font-size:38px;
    font-weight:800;
    font-variant-numeric:tabular-nums;
    background:var(--grad);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
    line-height:1;
    margin-bottom:8px;
  }
  .faq-list{display:flex;flex-direction:column;gap:12px;}
  .faq-item{
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
    transition:border-color .22s ease,background .22s ease;
  }
  .faq-item.open,.faq-item:hover{border-color:rgba(36,211,238,.4);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:20px 22px;
    background:transparent;
    border:0;
    color:var(--text);
    font-size:16px;
    font-weight:700;
    text-align:left;
    cursor:pointer;
    transition:color .2s ease;
  }
  .faq-q:hover{color:var(--primary);}
  .faq-sign{
    flex:0 0 auto;
    width:26px;height:26px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:8px;
    border:1px solid var(--line);
    color:var(--primary);
    font-size:13px;
    transition:transform .22s ease,background .22s ease,color .22s ease;
  }
  .faq-item.open .faq-sign{background:rgba(36,211,238,.18);color:var(--primary);transform:rotate(180deg);}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .24s ease;
  }
  .faq-a p{
    padding:0 22px 20px;
    margin:0;
    font-size:14.5px;
    color:var(--muted);
    line-height:1.9;
  }
  .faq-item.open .faq-a{max-height:260px;}

  /* ============ CTA ============ */
  .cta-band{
    position:relative;
    border-radius:var(--r-glass);
    border:1px solid rgba(36,211,238,.28);
    background:linear-gradient(120deg,rgba(36,211,238,.14),rgba(122,92,255,.16)),var(--panel);
    padding:40px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:28px;
    flex-wrap:wrap;
    overflow:hidden;
  }
  .cta-band::before{
    content:"";
    position:absolute;
    right:-80px;top:-90px;
    width:280px;height:280px;
    border-radius:50%;
    background:radial-gradient(circle,rgba(36,211,238,.32),transparent 66%);
    pointer-events:none;
  }
  .cta-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;}
  .cta-band p{color:#BCC9DF;font-size:15px;margin:0;max-width:620px;}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

  /* ============ FOOTER ============ */
  .site-footer{
    position:relative;
    background:#050810;
    border-top:1px solid var(--divider);
    padding:64px 0 28px;
    margin-top:24px;
    z-index:1;
  }
  .site-footer::before{
    content:"";
    position:absolute;
    top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(36,211,238,.6),rgba(122,92,255,.5),transparent);
  }
  .foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
  .foot-desc{font-size:14px;color:var(--muted);max-width:340px;}
  .foot-kw{
    font-size:13px;
    color:rgba(147,163,189,.85);
    margin:0;
    letter-spacing:.3px;
  }
  .foot-title{
    font-size:14px;
    font-weight:700;
    margin-bottom:16px;
    color:var(--text);
  }
  .foot-links{display:flex;flex-direction:column;gap:10px;}
  .foot-links a,.foot-links span{font-size:13.5px;color:var(--muted);}
  .foot-links a:hover{color:var(--primary);}
  .foot-bottom{
    margin-top:44px;
    padding-top:22px;
    border-top:1px solid var(--divider);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    font-size:12.5px;
    color:rgba(147,163,189,.8);
  }
  .foot-diamond{display:inline-flex;gap:6px;color:rgba(36,211,238,.5);font-size:7px;}

  .to-top{
    position:fixed;
    right:22px;bottom:26px;
    width:46px;height:46px;
    border-radius:14px;
    display:inline-flex;align-items:center;justify-content:center;
    background:rgba(11,18,36,.9);
    border:1px solid var(--line);
    color:var(--primary);
    font-size:16px;
    cursor:pointer;
    opacity:0;
    visibility:hidden;
    transform:translateY(10px);
    transition:opacity .24s ease,transform .24s ease,visibility .24s ease,background .24s ease;
    z-index:900;
  }
  .to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
  .to-top:hover{background:rgba(36,211,238,.18);}

  /* ============ 响应式 ============ */
  @media (max-width:1199.98px){
    .container{max-width:1140px;}
    .nav-pill{padding:8px 11px;font-size:13px;}
    .step-row:nth-child(2){margin-right:14px;}
    .step-row:nth-child(3){margin-right:28px;}
    .step-row:nth-child(4){margin-right:42px;}
    .step-row:nth-child(5){margin-right:56px;}
  }

  @media (max-width:991.98px){
    .nav-capsules{
      position:fixed;
      top:0;right:0;
      width:min(320px,84vw);
      height:100vh;
      flex-direction:column;
      align-items:stretch;
      gap:8px;
      padding:92px 22px 120px;
      background:rgba(7,11,24,.97);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
      border-left:1px solid var(--line);
      transform:translateX(104%);
      transition:transform .3s ease;
      z-index:1100;
      margin-left:0;
    }
    .nav-capsules.open{transform:translateX(0);}
    .nav-pill{justify-content:flex-start;padding:13px 16px;border-radius:14px;font-size:15px;}
    .nav-pill::after{display:none;}
    .nav-toggle{display:inline-flex;}
    .nav-actions .btn-ghost{display:none;}
    .hero-grid{grid-template-columns:1fr;gap:28px;}
    .scene-row{grid-template-columns:repeat(2,minmax(0,1fr));}
    .faq-grid{grid-template-columns:1fr;gap:24px;}
    .step-row{grid-template-columns:88px minmax(0,1fr);row-gap:14px;}
    .step-row .step-cta{grid-column:2;}
    .step-no{font-size:38px;}
    .sec-lg{padding:72px 0;}
    .sec-sm{padding:56px 0;}
    .step-row:nth-child(n){margin-right:0;}
    .check-panel{grid-template-columns:1fr;padding:26px;}
  }

  @media (max-width:767.98px){
    .scene-row{grid-template-columns:1fr;}
    .cta-band{padding:28px;}
    .brand-sub{display:none;}
    .page-hero{padding:52px 0 48px;}
  }

  @media (max-width:575.98px){
    .container{padding-left:16px;padding-right:16px;}
    h1{font-size:28px;}
    .hero-actions .btn-glow,
    .hero-actions .btn-ghost{width:100%;}
    .step-row{padding:20px 18px;grid-template-columns:1fr;row-gap:10px;}
    .step-row .step-cta{grid-column:1;}
    .stats-strip{gap:8px;}
    .foot-bottom{flex-direction:column;align-items:flex-start;}
    .cta-actions{width:100%;}
    .cta-actions .btn-glow,
    .cta-actions .btn-ghost{width:100%;}
  }

/* roulang page: category2 */
:root{
  --bg:#070B18;
  --panel:#0B1224;
  --panel-2:#0E1730;
  --glass:rgba(18,28,50,0.55);
  --primary:#24D3EE;
  --secondary:#7A5CFF;
  --accent:#C6FF4A;
  --warn:#FF6A3D;
  --text:#E8EEF9;
  --muted:#93A3BD;
  --line:rgba(120,160,220,0.14);
  --divider:rgba(120,160,220,0.10);
  --grad:linear-gradient(120deg,#24D3EE,#7A5CFF);
  --glow:0 0 24px rgba(36,211,238,0.35);
  --radius-card:18px;
  --radius-glass:20px;
  --radius-img:14px;
  --shadow-card:0 18px 48px rgba(0,0,0,0.45);
  --inset-hi:inset 0 1px 0 rgba(255,255,255,0.08);
  --gap-section:88px;

  --bs-body-bg:#070B18;
  --bs-body-color:#E8EEF9;
  --bs-primary:#24D3EE;
  --bs-link-color:#24D3EE;
  --bs-link-hover-color:#7A5CFF;
  --bs-border-color:rgba(120,160,220,0.14);
  --bs-border-radius:14px;
  --bs-border-radius-lg:18px;
  --bs-border-radius-sm:10px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--bs-font-sans-serif);
  font-size:15.5px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(680px 420px at 88% -6%, rgba(122,92,255,0.16), transparent 68%),
    radial-gradient(560px 380px at 4% 12%, rgba(36,211,238,0.10), transparent 70%);
  pointer-events:none;
  z-index:0;
}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--secondary);}
img{max-width:100%;display:block;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.3;}
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(--primary);outline-offset:2px;border-radius:6px;}

.container{
  max-width:1200px;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  height:72px;
  display:flex;
  align-items:center;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:height .25s ease,background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.scrolled{
  height:64px;
  background:rgba(7,11,24,0.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--divider);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:18px;
  width:100%;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:38px;
  height:38px;
  border-radius:12px;
  background:var(--grad);
  display:grid;
  place-items:center;
  color:#04121A;
  font-size:16px;
  box-shadow:var(--glow);
  flex-shrink:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-main{
  font-weight:800;
  font-size:15px;
  color:var(--text);
  letter-spacing:.2px;
  white-space:nowrap;
}
.brand-sub{
  font-size:11px;
  color:var(--muted);
  letter-spacing:.5px;
  white-space:nowrap;
}
.nav-capsules{
  display:flex;
  align-items:center;
  gap:4px;
  margin:0 auto;
}
.nav-pill{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:9px 12px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:500;
  color:var(--muted);
  white-space:nowrap;
  transition:color .22s ease,background .22s ease,box-shadow .22s ease;
}
.nav-pill i{font-size:12px;opacity:.85;}
.nav-pill::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:1px;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--grad);
  transform:translateX(-50%);
  transition:width .22s ease;
}
.nav-pill:hover{color:var(--text);background:rgba(36,211,238,0.07);}
.nav-pill:hover::after{width:62%;}
.nav-pill.active{
  color:var(--text);
  background:rgba(36,211,238,0.13);
  box-shadow:inset 0 0 0 1px rgba(36,211,238,0.28);
}
.nav-pill.active::after{width:62%;}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(18,28,50,0.6);
  color:var(--text);
  font-size:16px;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:rgba(36,211,238,0.5);color:var(--primary);}
.nav-drawer-cta{display:none;}
.nav-mask{
  position:fixed;
  inset:0;
  background:rgba(4,8,18,0.62);
  backdrop-filter:blur(2px);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
  z-index:1040;
}
.nav-mask.open{opacity:1;visibility:visible;}

/* ---------- 按钮 ---------- */
.btn-glow{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border:0;
  border-radius:999px;
  background:var(--grad);
  background-size:170% 170%;
  background-position:0 0;
  color:#04121A;
  font-weight:700;
  font-size:14px;
  cursor:pointer;
  box-shadow:0 0 24px rgba(36,211,238,0.35);
  transition:transform .2s ease,box-shadow .2s ease,background-position .4s ease;
}
.btn-glow:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(36,211,238,0.55);background-position:100% 0;color:#04121A;}
.btn-glow:active{transform:translateY(1px);}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:999px;
  border:1px solid rgba(36,211,238,0.45);
  background:transparent;
  color:var(--text);
  font-weight:600;
  font-size:14px;
  cursor:pointer;
  transition:transform .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--primary);color:var(--primary);box-shadow:0 0 18px rgba(36,211,238,0.25);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{min-height:38px;padding:0 16px;font-size:13px;border-radius:999px;}
.btn-text{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  padding:6px 0;
}
.btn-text i{transition:transform .22s ease;font-size:12px;}
.btn-text:hover i{transform:translateX(4px);}

/* ---------- 通用板块 ---------- */
.section{
  position:relative;
  z-index:1;
  padding:var(--gap-section) 0;
}
.section-tight{padding:64px 0;}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:36px;
  flex-wrap:wrap;
}
.sec-title{
  position:relative;
  padding-left:16px;
  font-size:clamp(23px,3vw,32px);
  font-weight:700;
  letter-spacing:-.2px;
}
.sec-title::before{
  content:"";
  position:absolute;
  left:0;
  top:6px;
  bottom:6px;
  width:4px;
  border-radius:3px;
  background:var(--grad);
  box-shadow:0 0 16px rgba(36,211,238,0.45);
}
.sec-desc{
  color:var(--muted);
  font-size:14.5px;
  max-width:620px;
  margin-top:12px;
}
.sec-line{
  flex:1;
  min-width:60px;
  height:1px;
  background:linear-gradient(90deg,rgba(36,211,238,0.28),transparent);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:1.4px;
  color:var(--primary);
  text-transform:none;
  margin-bottom:12px;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:var(--grad);
}

/* ---------- 首屏 ---------- */
.banner{
  position:relative;
  overflow:hidden;
  padding:44px 0 72px;
  border-bottom:1px solid var(--divider);
}
.banner-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center 30%;
  opacity:.20;
}
.banner-mask{
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(7,11,24,0.96) 8%,rgba(7,11,24,0.78) 46%,rgba(7,11,24,0.94) 100%);
}
.banner-grid{
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(120,160,220,0.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,220,0.055) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 70% 30%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 70% 30%,#000 0%,transparent 72%);
}
.banner-glow{
  position:absolute;
  right:-140px;
  top:-160px;
  width:520px;
  height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(122,92,255,0.28),transparent 68%);
  pointer-events:none;
}
.banner-inner{position:relative;z-index:2;}
.crumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:26px;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb i{font-size:10px;opacity:.6;}
.crumb .current{color:var(--primary);}
.banner h1{
  font-size:clamp(30px,4.4vw,48px);
  font-weight:800;
  letter-spacing:-.5px;
  line-height:1.24;
  max-width:880px;
}
.banner h1 em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.banner-sub{
  margin-top:18px;
  font-size:16.5px;
  color:var(--muted);
  max-width:660px;
  line-height:1.85;
}
.banner-cta{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:30px;
}
.badge-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:28px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 14px;
  border-radius:999px;
  font-size:12.5px;
  letter-spacing:.4px;
  color:var(--text);
  background:rgba(18,28,50,0.58);
  border:1px solid var(--line);
  transition:border-color .22s ease,color .22s ease;
}
.chip i{color:var(--primary);font-size:11px;}
.chip:hover{border-color:rgba(36,211,238,0.45);}
.chip-accent{color:var(--accent);border-color:rgba(198,255,74,0.28);}
.chip-accent i{color:var(--accent);}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
  margin-top:-42px;
  position:relative;
  z-index:3;
}
.stat-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px 22px;
  box-shadow:var(--shadow-card),var(--inset-hi);
  transition:transform .24s ease,border-color .24s ease;
}
.stat-card:hover{transform:translateY(-4px);border-color:rgba(36,211,238,0.45);}
.stat-num{
  font-variant-numeric:tabular-nums;
  font-size:28px;
  font-weight:800;
  letter-spacing:-.5px;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  line-height:1.2;
}
.stat-label{font-size:13px;color:var(--muted);margin-top:6px;}

/* ---------- 交替图文 ---------- */
.feature-row{align-items:center;}
.feature-row + .feature-row{margin-top:72px;}
.feat-media{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.feat-media img{
  width:100%;
  height:330px;
  object-fit:cover;
  filter:brightness(.84) saturate(1.04);
}
.feat-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,11,24,0.05) 34%,rgba(7,11,24,0.80) 100%);
}
.feat-tag{
  position:absolute;
  left:16px;
  top:16px;
  z-index:2;
  padding:6px 13px;
  border-radius:8px;
  font-size:12px;
  letter-spacing:.5px;
  color:var(--accent);
  background:rgba(11,18,36,0.78);
  border:1px solid rgba(198,255,74,0.3);
  backdrop-filter:blur(6px);
}
.feat-body{padding:0 6px;}
.feat-body h2{
  font-size:clamp(21px,2.4vw,27px);
  font-weight:700;
  letter-spacing:-.2px;
  margin-bottom:14px;
}
.feat-body p{color:var(--muted);font-size:15px;}
.feat-list{margin:18px 0 22px;display:grid;gap:10px;}
.feat-list li{
  position:relative;
  padding-left:26px;
  color:var(--text);
  font-size:14.5px;
}
.feat-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:14px;
  height:8px;
  border-left:2px solid var(--primary);
  border-bottom:2px solid var(--primary);
  transform:rotate(-45deg);
  border-radius:1px;
}

/* ---------- 场景卡 ---------- */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.scene-card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 22px 24px;
  box-shadow:var(--inset-hi);
  overflow:hidden;
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.scene-card::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:1px;
  background:var(--grad);
  opacity:.5;
  transition:opacity .24s ease;
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(36,211,238,0.45);box-shadow:var(--shadow-card);}
.scene-card:hover::before{opacity:1;}
.scene-ico{
  width:42px;
  height:42px;
  border-radius:12px;
  display:grid;
  place-items:center;
  background:rgba(36,211,238,0.10);
  border:1px solid rgba(36,211,238,0.22);
  color:var(--primary);
  font-size:16px;
  margin-bottom:16px;
}
.scene-card h3{font-size:16.5px;font-weight:600;margin-bottom:10px;}
.scene-card p{color:var(--muted);font-size:14px;line-height:1.75;}

/* ---------- 限时条 ---------- */
.limited{
  display:flex;
  align-items:center;
  gap:26px;
  padding:24px 28px;
  border-radius:var(--radius-glass);
  background:var(--glass);
  border:1px solid rgba(198,255,74,0.22);
  backdrop-filter:blur(14px);
  box-shadow:var(--inset-hi),0 0 34px rgba(198,255,74,0.08);
  flex-wrap:wrap;
}
.countdown{
  display:flex;
  align-items:center;
  gap:6px;
  font-variant-numeric:tabular-nums;
  flex-shrink:0;
}
.countdown span{
  display:inline-grid;
  place-items:center;
  min-width:46px;
  height:46px;
  padding:0 8px;
  border-radius:12px;
  background:rgba(7,11,24,0.72);
  border:1px solid rgba(198,255,74,0.28);
  color:var(--accent);
  font-weight:800;
  font-size:20px;
  text-shadow:0 0 14px rgba(198,255,74,0.55);
}
.countdown i{color:var(--accent);font-style:normal;font-weight:700;opacity:.7;}
.limited-text{flex:1;min-width:220px;}
.limited-text strong{display:block;font-size:16.5px;font-weight:700;margin-bottom:4px;}
.limited-text span{font-size:13.5px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .24s ease;
}
.faq-item:hover{border-color:rgba(36,211,238,0.32);}
.faq-item.open{border-color:rgba(36,211,238,0.45);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:19px 22px;
  background:transparent;
  border:0;
  text-align:left;
  color:var(--text);
  font-size:15.5px;
  font-weight:600;
  cursor:pointer;
}
.faq-ico{
  position:relative;
  width:22px;
  height:22px;
  flex-shrink:0;
  border-radius:50%;
  border:1px solid rgba(36,211,238,0.4);
  color:var(--primary);
  transition:transform .24s ease,background .24s ease;
}
.faq-ico::before,
.faq-ico::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:currentColor;
  transform:translate(-50%,-50%);
  border-radius:2px;
}
.faq-ico::before{width:10px;height:1.5px;}
.faq-ico::after{width:1.5px;height:10px;transition:opacity .2s ease;}
.faq-item.open .faq-ico{background:rgba(36,211,238,0.14);transform:rotate(180deg);}
.faq-item.open .faq-ico::after{opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .26s ease;
}
.faq-a-inner{
  padding:0 22px 22px;
  color:var(--muted);
  font-size:14.5px;
  line-height:1.85;
  border-top:1px solid var(--divider);
  padding-top:16px;
  margin:0 22px 22px;
  padding-left:0;
  padding-right:0;
}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;
  overflow:hidden;
  background:var(--glass);
  border:1px solid rgba(36,211,238,0.24);
  border-radius:var(--radius-glass);
  padding:48px 44px;
  backdrop-filter:blur(14px);
  box-shadow:var(--inset-hi);
  text-align:center;
}
.cta-panel::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:1px;
  background:var(--grad);
}
.cta-panel::after{
  content:"";
  position:absolute;
  right:-120px;
  bottom:-160px;
  width:380px;
  height:380px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(36,211,238,0.20),transparent 68%);
  pointer-events:none;
}
.cta-panel h2{
  font-size:clamp(23px,3vw,32px);
  font-weight:800;
  letter-spacing:-.3px;
  position:relative;
  z-index:2;
}
.cta-panel p{
  position:relative;
  z-index:2;
  color:var(--muted);
  font-size:15px;
  max-width:640px;
  margin:14px auto 0;
}
.cta-actions{
  position:relative;
  z-index:2;
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:14px;
  margin-top:28px;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:20px;
  background:#050810;
  border-top:1px solid var(--divider);
  padding:64px 0 26px;
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(36,211,238,0.55),rgba(122,92,255,0.55),transparent);
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-desc{color:var(--muted);font-size:14px;max-width:360px;line-height:1.8;}
.foot-kw{
  color:rgba(36,211,238,0.78);
  font-size:12.5px;
  letter-spacing:.4px;
  margin-top:12px;
}
.foot-title{
  font-size:13.5px;
  font-weight:600;
  color:var(--text);
  letter-spacing:.6px;
  margin-bottom:16px;
}
.foot-links{display:flex;flex-direction:column;gap:10px;}
.foot-links a,.foot-links span{
  color:var(--muted);
  font-size:13.5px;
  line-height:1.6;
}
.foot-links a{position:relative;display:inline-block;width:fit-content;}
.foot-links a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:0;
  height:1px;
  background:var(--primary);
  transition:width .24s ease;
}
.foot-links a:hover{color:var(--primary);}
.foot-links a:hover::after{width:100%;}
.foot-bottom{
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid var(--divider);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12.5px;
  color:var(--muted);
}
.foot-diamond{display:inline-flex;gap:6px;color:rgba(36,211,238,0.4);font-size:8px;}

.to-top{
  position:fixed;
  right:22px;
  bottom:26px;
  width:46px;
  height:46px;
  border-radius:14px;
  border:1px solid rgba(36,211,238,0.35);
  background:rgba(11,18,36,0.85);
  backdrop-filter:blur(10px);
  color:var(--primary);
  display:grid;
  place-items:center;
  font-size:15px;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:all .26s ease;
  z-index:1020;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{box-shadow:0 0 22px rgba(36,211,238,0.4);}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  :root{--gap-section:80px;}
}
@media (max-width:991.98px){
  :root{--gap-section:72px;}
  .nav-capsules{
    position:fixed;
    top:0;
    right:0;
    height:100vh;
    width:min(320px,86vw);
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    margin:0;
    padding:86px 18px 140px;
    background:rgba(9,15,30,0.97);
    backdrop-filter:blur(16px);
    border-left:1px solid var(--line);
    transform:translateX(106%);
    transition:transform .28s ease;
    z-index:1050;
    overflow-y:auto;
  }
  .nav-capsules.open{transform:translateX(0);}
  .nav-pill{padding:14px 16px;border-radius:14px;font-size:15px;}
  .nav-pill::after{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-actions .btn-ghost,.nav-actions .btn-glow{display:none;}
  .nav-drawer-cta{
    display:flex;
    flex-direction:column;
    gap:10px;
    position:absolute;
    left:18px;
    right:18px;
    bottom:24px;
  }
  .stat-strip{grid-template-columns:repeat(2,1fr);margin-top:34px;}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .feat-media img{height:290px;}
  .feature-row + .feature-row{margin-top:56px;}
  .brand-sub{display:none;}
}
@media (max-width:767.98px){
  body{font-size:15px;}
  .container{padding-left:16px;padding-right:16px;}
  .banner{padding:30px 0 56px;}
  .banner-sub{font-size:15px;}
  .banner-cta .btn-glow,.banner-cta .btn-ghost{width:100%;}
  .cta-panel{padding:34px 22px;}
  .cta-actions .btn-glow,.cta-actions .btn-ghost{width:100%;}
  .limited{padding:20px;gap:16px;}
  .limited .btn-glow{width:100%;}
  .countdown span{min-width:40px;height:40px;font-size:17px;}
  .feat-media img{height:230px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:575.98px){
  :root{--gap-section:56px;}
  .stat-strip{grid-template-columns:1fr;gap:12px;}
  .scene-grid{grid-template-columns:1fr;gap:12px;}
  .brand-main{font-size:13.5px;}
  .section-tight{padding:48px 0;}
}

/* roulang page: category3 */
:root{
  --bs-body-bg:#070B18;
  --bs-body-color:#E8EEF9;
  --bs-primary:#24D3EE;
  --bs-link-color:#24D3EE;
  --bs-link-hover-color:#7A5CFF;
  --bs-border-color:rgba(120,160,220,.14);
  --bs-border-radius:18px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;

  --c-bg:#070B18;
  --c-panel:#0B1224;
  --c-glass:rgba(18,28,50,.55);
  --c-primary:#24D3EE;
  --c-second:#7A5CFF;
  --c-accent:#C6FF4A;
  --c-warn:#FF6A3D;
  --c-text:#E8EEF9;
  --c-muted:#93A3BD;
  --c-line:rgba(120,160,220,.14);
  --c-line-soft:rgba(120,160,220,.10);
  --grad:linear-gradient(120deg,#24D3EE,#7A5CFF);
  --glow:0 0 24px rgba(36,211,238,.35);
  --radius-card:18px;
  --radius-glass:20px;
  --radius-img:14px;
  --radius-input:12px;
  --shadow-card:0 18px 48px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.08);
  --gap-lg:96px;
  --gap-md:64px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--bs-font-sans-serif);
  font-size:15px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-second)}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.2px}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:6px}

.container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto}
@media (min-width:1400px){.container{max-width:1200px}}
@media (max-width:575.98px){.container{padding-left:16px;padding-right:16px}}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  height:72px;display:flex;align-items:center;
  background:linear-gradient(180deg,rgba(7,11,24,.85),rgba(7,11,24,.35));
  border-bottom:1px solid transparent;
  transition:height .25s ease,background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-stuck{
  height:64px;
  background:rgba(7,11,24,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--c-line-soft);
}
.nav-wrap{display:flex;align-items:center;gap:18px;width:100%}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;color:var(--c-text)}
.brand:hover{color:var(--c-text)}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:var(--grad);color:#06111F;font-size:17px;
  box-shadow:0 0 18px rgba(36,211,238,.32);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-main{font-size:16px;font-weight:800;letter-spacing:.2px;white-space:nowrap}
.brand-sub{font-size:11px;color:var(--c-muted);letter-spacing:.6px;white-space:nowrap}

.nav-capsules{display:flex;align-items:center;gap:6px;margin-left:12px;flex:1 1 auto;min-width:0}
.nav-pill{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:999px;font-size:13.5px;color:var(--c-muted);
  white-space:nowrap;transition:color .2s ease,background .2s ease;
}
.nav-pill i{font-size:12.5px;opacity:.9}
.nav-pill::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .24s ease;
}
.nav-pill:hover{color:var(--c-text);background:rgba(36,211,238,.08)}
.nav-pill:hover::after{transform:scaleX(1)}
.nav-pill.active{
  color:var(--c-text);background:rgba(36,211,238,.14);
  box-shadow:inset 0 0 0 1px rgba(36,211,238,.28);
}
.nav-pill.active::after{transform:scaleX(1)}

.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;margin-left:auto}

.btn-glow,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:999px;font-size:14px;font-weight:600;
  cursor:pointer;border:1px solid transparent;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
}
.btn-glow{background:var(--grad);color:#06111F;box-shadow:var(--glow)}
.btn-glow:hover{color:#06111F;transform:translateY(-2px);box-shadow:0 0 32px rgba(36,211,238,.55)}
.btn-glow:active{transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:rgba(36,211,238,.45)}
.btn-ghost:hover{color:var(--c-text);background:rgba(36,211,238,.12);border-color:var(--c-primary);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(-1px)}
.btn-sm{min-height:38px;padding:0 16px;font-size:13px}
.btn-block{width:100%}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;
  color:var(--c-primary);border-bottom:1px solid transparent;
}
.btn-text:hover{border-bottom-color:var(--c-primary)}

.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:rgba(18,28,50,.6);color:var(--c-text);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--c-primary)}

/* mobile drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,7,15,.65);backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:1040;
}
.drawer-mask.open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;width:300px;max-width:86vw;height:100%;z-index:1050;
  background:#0A1121;border-left:1px solid var(--c-line);
  transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;padding:22px 20px 20px;
}
.nav-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:38px;height:38px;border-radius:12px;border:1px solid var(--c-line);background:transparent;color:var(--c-text);cursor:pointer}
.drawer-links{display:flex;flex-direction:column;gap:8px;overflow-y:auto}
.drawer-links a{
  display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:12px;
  color:var(--c-muted);font-size:14px;border:1px solid transparent;
}
.drawer-links a:hover{color:var(--c-text);background:rgba(36,211,238,.08);border-color:rgba(36,211,238,.22)}
.drawer-links a.active{color:var(--c-text);background:rgba(36,211,238,.14);border-color:rgba(36,211,238,.3)}
.drawer-foot{margin-top:auto;padding-top:18px}

/* ---------- hero ---------- */
.page-hero{
  position:relative;padding:150px 0 72px;overflow:hidden;
  background-image:linear-gradient(120deg,rgba(7,11,24,.94),rgba(9,14,30,.86)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,160,220,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,160,220,.06) 1px,transparent 1px);
  background-size:24px 24px;
  mask-image:radial-gradient(120% 90% at 80% 0%,rgba(0,0,0,.9),transparent 70%);
}
.page-hero::after{
  content:"";position:absolute;top:-180px;right:-120px;width:520px;height:520px;pointer-events:none;
  background:radial-gradient(circle,rgba(36,211,238,.22),transparent 62%);
}
.page-hero .container{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--c-muted);margin-bottom:20px}
.crumbs a{color:var(--c-muted)}
.crumbs a:hover{color:var(--c-primary)}
.crumbs i{font-size:9px;opacity:.6}
.crumbs .current{color:var(--c-primary)}

.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(36,211,238,.1);border:1px solid rgba(36,211,238,.28);
  font-size:12px;letter-spacing:.5px;color:var(--c-primary);margin-bottom:18px;
}
h1.hero-title{
  font-size:clamp(30px,4.2vw,48px);font-weight:800;letter-spacing:-.5px;line-height:1.2;margin-bottom:16px;
}
h1.hero-title .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:16px;color:var(--c-muted);max-width:560px;margin-bottom:26px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:7px;padding:7px 14px;border-radius:999px;
  background:rgba(18,28,50,.7);border:1px solid var(--c-line);font-size:12.5px;color:var(--c-muted);
}
.chip i{color:var(--c-primary);font-size:11.5px}

.hero-card{
  background:var(--c-glass);backdrop-filter:blur(14px);
  border:1px solid var(--c-line);border-top-color:rgba(255,255,255,.16);
  border-radius:var(--radius-glass);padding:26px;box-shadow:var(--shadow-card);
}
.hero-card .tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:8px;
  background:rgba(198,255,74,.14);color:var(--c-accent);font-size:12px;letter-spacing:.5px;font-weight:600;
}
.hero-card h2{font-size:17px;margin:16px 0 6px}
.hero-card .num{font-size:44px;font-weight:800;font-variant-numeric:tabular-nums;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.hero-card .num small{font-size:14px;color:var(--c-muted);-webkit-text-fill-color:var(--c-muted);font-weight:500;margin-left:6px}
.step-list{margin:18px 0;display:flex;flex-direction:column;gap:10px}
.step-list li{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--c-muted)}
.step-list li b{color:var(--c-text);font-weight:600}
.dot{width:8px;height:8px;border-radius:50%;background:var(--grad);flex-shrink:0}

/* ---------- sections ---------- */
.section{padding:var(--gap-md) 0;position:relative}
.section-lg{padding:var(--gap-lg) 0}
.section-panel{background:var(--c-panel);border-top:1px solid var(--c-line-soft);border-bottom:1px solid var(--c-line-soft)}
.sec-head{margin-bottom:28px}
.sec-title{
  position:relative;padding-left:16px;font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.3;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--grad);
}
.sec-desc{color:var(--c-muted);font-size:14.5px;margin-top:10px;max-width:720px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.diamond-line{
  display:flex;align-items:center;gap:6px;color:var(--c-second);opacity:.35;font-size:9px;
}
.diamond-line::before,.diamond-line::after{content:"";height:1px;flex:1;background:linear-gradient(90deg,transparent,rgba(120,160,220,.4),transparent)}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:44px}
.timeline::before{
  content:"";position:absolute;left:50%;top:6px;bottom:6px;width:2px;transform:translateX(-1px);
  background:linear-gradient(180deg,transparent,rgba(36,211,238,.55) 10%,rgba(122,92,255,.5) 88%,transparent);
}
.tl-item{position:relative;width:50%;padding:0 52px 0 0;margin-bottom:34px;text-align:right}
.tl-item:nth-child(even){margin-left:50%;padding:0 0 0 52px;text-align:left}
.tl-item::after{
  content:"";position:absolute;top:34px;width:14px;height:14px;border-radius:50%;
  background:#0B1224;border:2px solid var(--c-primary);
  box-shadow:0 0 14px rgba(36,211,238,.6);
}
.tl-item:nth-child(odd)::after{right:-8px}
.tl-item:nth-child(even)::after{left:-8px}
.tl-card{
  position:relative;background:var(--c-panel);border:1px solid var(--c-line);
  border-radius:var(--radius-card);padding:22px 22px 20px;box-shadow:var(--shadow-card);
  transition:transform .24s ease,border-color .24s ease;
  text-align:left;
}
.tl-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;border-radius:var(--radius-card) var(--radius-card) 0 0;
  background:var(--grad);opacity:.55;
}
.tl-card:hover{transform:translateY(-4px);border-color:rgba(36,211,238,.45)}
.tl-meta{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.tl-no{
  font-size:12.5px;font-weight:800;letter-spacing:1px;font-variant-numeric:tabular-nums;
  color:var(--c-primary);
}
.tl-time{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;
  background:rgba(122,92,255,.14);color:#B9A9FF;font-size:11.5px;letter-spacing:.4px;
}
.tl-card h3{font-size:19px;margin-bottom:8px}
.tl-card p{font-size:14px;color:var(--c-muted);margin-bottom:14px}
.tl-points{display:flex;flex-direction:column;gap:7px}
.tl-points li{display:flex;gap:9px;font-size:13.5px;color:var(--c-muted)}
.tl-points li i{color:var(--c-primary);font-size:11px;margin-top:7px;flex-shrink:0}

/* ---------- rhythm cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.info-card{
  position:relative;background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-card);transition:transform .24s ease,border-color .24s ease;
  height:100%;
}
.info-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:var(--grad);opacity:.5;border-radius:var(--radius-card) var(--radius-card) 0 0;
}
.info-card:hover{transform:translateY(-4px);border-color:rgba(36,211,238,.45)}
.info-card:hover::before{opacity:1}
.ic-icon{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:rgba(36,211,238,.12);color:var(--c-primary);font-size:17px;margin-bottom:16px;
}
.info-card h3{font-size:18px;margin-bottom:10px}
.info-card p{font-size:14px;color:var(--c-muted)}
.mini-list{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.mini-list li{display:flex;gap:9px;font-size:13.5px;color:var(--c-muted)}
.mini-list li i{color:var(--c-second);font-size:10px;margin-top:7px}

/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center}
.split-media{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--c-line)}
.split-media img{width:100%;height:340px;object-fit:cover;border-radius:var(--radius-card);filter:saturate(1.05)}
.split-media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(140deg,rgba(7,11,24,.55),rgba(7,11,24,.2));
  border-radius:var(--radius-card);
}
.split-body h3{font-size:22px;margin-bottom:12px}
.split-body p{color:var(--c-muted);font-size:14.5px}
.check-list{margin:18px 0 22px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.check-list li{display:flex;gap:9px;font-size:13.5px;color:var(--c-muted)}
.check-list li i{color:var(--c-primary);font-size:12px;margin-top:6px}

.stat-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:22px}
.stat{
  background:rgba(18,28,50,.6);border:1px solid var(--c-line);border-radius:14px;padding:16px 18px;
}
.stat b{display:block;font-size:26px;font-weight:800;font-variant-numeric:tabular-nums;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.2}
.stat span{font-size:12.5px;color:var(--c-muted)}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--radius-card);overflow:hidden;
  transition:border-color .24s ease;
}
.faq-item.open{border-color:rgba(36,211,238,.42)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:15.5px;font-weight:600;color:var(--c-text);
}
.faq-q:hover{color:var(--c-primary)}
.faq-sign{
  width:26px;height:26px;flex-shrink:0;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--c-line);color:var(--c-primary);font-size:12px;
  transition:transform .22s ease,background .22s ease,color .22s ease;
}
.faq-item.open .faq-sign{background:var(--grad);color:#06111F;border-color:transparent;transform:rotate(180deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .22s ease;
}
.faq-a-inner{padding:0 22px 20px;color:var(--c-muted);font-size:14px;border-top:1px solid var(--c-line-soft);
  padding-top:16px;margin:0 22px 20px;padding-left:0;padding-right:0}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:24px;padding:44px;
  background-image:linear-gradient(120deg,rgba(9,14,30,.94),rgba(11,18,36,.86)),url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;border:1px solid rgba(36,211,238,.24);
  box-shadow:var(--shadow-card);
}
.cta-band::after{
  content:"";position:absolute;top:-140px;left:-80px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(122,92,255,.24),transparent 62%);pointer-events:none;
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:32px;align-items:center}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);margin-bottom:12px}
.cta-band p{color:var(--c-muted);font-size:14.5px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.anchor{display:block;position:relative;top:-90px;visibility:hidden}

/* ---------- footer ---------- */
.site-footer{
  position:relative;background:#04070F;border-top:1px solid var(--c-line-soft);padding:56px 0 28px;margin-top:0;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:var(--grad);opacity:.7;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-desc{color:var(--c-muted);font-size:13.5px;max-width:360px}
.foot-kw{color:var(--c-primary);font-size:12.5px;margin-top:12px;letter-spacing:.3px}
.foot-title{font-size:14px;font-weight:700;margin-bottom:14px;color:var(--c-text)}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-links a,.foot-links span{color:var(--c-muted);font-size:13.5px}
.foot-links a{display:inline-block;border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease}
.foot-links a:hover{color:var(--c-primary);border-bottom-color:var(--c-primary)}
.foot-bottom{
  margin-top:34px;padding-top:22px;border-top:1px solid var(--c-line-soft);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--c-muted);font-size:12.5px;
}
.foot-diamond{display:flex;align-items:center;gap:5px;color:var(--c-second);opacity:.45;font-size:7px}

.to-top{
  position:fixed;right:22px;bottom:24px;width:46px;height:46px;border-radius:50%;z-index:1020;
  display:grid;place-items:center;border:1px solid rgba(36,211,238,.4);
  background:rgba(11,18,36,.9);color:var(--c-primary);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s ease,visibility .24s ease,transform .24s ease,box-shadow .24s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{box-shadow:var(--glow);transform:translateY(-2px)}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .nav-capsules{gap:2px;margin-left:6px}
  .nav-pill{padding:8px 10px;font-size:12.5px}
  .nav-pill i{display:none}
}
@media (max-width:991.98px){
  .nav-capsules{display:none}
  .nav-toggle{display:grid;place-items:center}
  .nav-actions .btn-ghost{display:none}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .page-hero{padding:130px 0 60px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:26px}
  .cta-grid{grid-template-columns:1fr;gap:24px}
  .cta-actions{justify-content:flex-start}
  .section-lg{padding:72px 0}
  .section{padding:64px 0}
}
@media (max-width:767.98px){
  .timeline::before{left:9px;transform:none}
  .tl-item,.tl-item:nth-child(even){
    width:100%;margin-left:0;padding:0 0 0 40px;text-align:left;margin-bottom:24px;
  }
  .tl-item:nth-child(odd)::after,.tl-item:nth-child(even)::after{left:2px;right:auto;top:30px}
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .check-list{grid-template-columns:1fr}
  .stat-row{grid-template-columns:1fr;gap:12px}
  .cta-band{padding:28px 22px;border-radius:18px}
  .brand-sub{display:none}
  .hero-card{padding:22px}
}
@media (max-width:575.98px){
  .page-hero{padding:118px 0 48px}
  .section,.section-lg{padding:52px 0}
  .hero-cta .btn-glow,.hero-cta .btn-ghost{width:100%}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:16px}
  .split-media img{height:220px}
}

/* roulang page: category4 */
:root{
  --bs-body-bg:#070B18;
  --bs-body-color:#E8EEF9;
  --bs-primary:#24D3EE;
  --bs-link-color:#24D3EE;
  --bs-link-hover-color:#7A5CFF;
  --bs-border-color:rgba(120,160,220,.14);
  --bs-border-color-translucent:rgba(120,160,220,.14);
  --bs-border-radius:14px;
  --bs-border-radius-lg:18px;
  --bs-emphasis-color:#E8EEF9;
  --bs-secondary-color:#93A3BD;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;

  --bg:#070B18;
  --bg-2:#0B1224;
  --panel:rgba(18,28,50,.55);
  --primary:#24D3EE;
  --secondary:#7A5CFF;
  --accent:#C6FF4A;
  --warn:#FF6A3D;
  --text:#E8EEF9;
  --muted:#93A3BD;
  --border:rgba(120,160,220,.14);
  --line:rgba(120,160,220,.10);
  --grad:linear-gradient(120deg,#24D3EE,#7A5CFF);
  --glow:0 0 24px rgba(36,211,238,.35);
  --r-card:18px;
  --r-glass:20px;
  --r-img:14px;
  --shadow-card:0 18px 48px rgba(0,0,0,.45);
  --maxw:1200px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(680px 420px at 88% -6%, rgba(36,211,238,.16), transparent 70%),
    radial-gradient(560px 360px at 4% 12%, rgba(122,92,255,.14), transparent 72%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .22s ease,opacity .22s ease}
a:hover{color:var(--secondary)}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.2px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}

.container{max-width:var(--maxw);padding-left:24px;padding-right:24px;margin:0 auto;position:relative;z-index:1}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .26s ease,border-color .26s ease,backdrop-filter .26s ease,padding .26s ease;
}
.site-header.is-stuck{
  background:rgba(7,11,24,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:18px;
  height:72px;
  transition:height .26s ease;
}
.site-header.is-stuck .nav-wrap{height:64px}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--text)}
.brand:hover{color:var(--text)}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;
  display:grid;place-items:center;
  border-radius:14px;
  background:var(--grad);
  color:#04121A;
  font-size:18px;
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-main{font-size:16px;font-weight:800;letter-spacing:-.2px;white-space:nowrap}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:.5px;white-space:nowrap}

.nav-capsules{display:flex;align-items:center;gap:6px;margin-left:auto;margin-right:auto}
.nav-pill{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;
  border-radius:999px;
  font-size:14px;
  color:var(--muted);
  white-space:nowrap;
  transition:color .22s ease,background .22s ease;
}
.nav-pill i{font-size:13px;color:var(--primary);opacity:.85}
.nav-pill::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--grad);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s ease;
  border-radius:2px;
}
.nav-pill:hover{color:var(--text);background:rgba(36,211,238,.07)}
.nav-pill:hover::after{transform:scaleX(1)}
.nav-pill.active{
  color:var(--text);
  background:rgba(36,211,238,.14);
}
.nav-pill.active::after{transform:scaleX(1)}

.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.btn-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;
  border:none;border-radius:999px;
  background:var(--grad);
  background-size:180% 180%;
  color:#04121A;
  font-size:14px;font-weight:700;
  box-shadow:var(--glow);
  transition:transform .2s ease,box-shadow .24s ease,background-position .4s ease;
}
.btn-glow:hover{
  color:#04121A;
  transform:translateY(-2px);
  background-position:100% 50%;
  box-shadow:0 0 34px rgba(36,211,238,.55);
}
.btn-glow:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;
  border:1px solid rgba(36,211,238,.5);
  border-radius:999px;
  background:transparent;
  color:var(--primary);
  font-size:14px;font-weight:600;
  transition:transform .2s ease,border-color .22s ease,background .22s ease,color .22s ease;
}
.btn-ghost:hover{
  color:var(--text);
  border-color:var(--primary);
  background:rgba(36,211,238,.1);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{min-height:40px;padding:0 18px;font-size:13.5px}
.btn-link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.btn-link-arrow i{transition:transform .22s ease}
.btn-link-arrow:hover i{transform:translateX(4px)}
.w-100{width:100%}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--border);
  border-radius:12px;
  background:rgba(11,18,36,.7);
  color:var(--text);
  font-size:17px;
  cursor:pointer;
  transition:border-color .22s ease,color .22s ease;
}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary)}

/* ---------- 移动端抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(3,6,14,.66);
  backdrop-filter:blur(2px);
  opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s ease;
  z-index:1200;
}
.drawer-mask.open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;
  width:min(86vw,340px);
  background:linear-gradient(180deg,#0B1224,#070B18);
  border-left:1px solid var(--border);
  transform:translateX(104%);
  transition:transform .28s cubic-bezier(.3,.8,.3,1);
  z-index:1300;
  display:flex;flex-direction:column;
  padding:20px;
}
.nav-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:38px;height:38px;border-radius:11px;
  border:1px solid var(--border);background:transparent;color:var(--text);
  cursor:pointer;transition:border-color .22s ease,color .22s ease;
}
.drawer-close:hover{border-color:var(--primary);color:var(--primary)}
.drawer-links{display:flex;flex-direction:column;gap:4px;padding:18px 0;overflow-y:auto;flex:1}
.drawer-links a{
  display:flex;align-items:center;gap:10px;
  padding:13px 14px;
  border-radius:12px;
  color:var(--muted);
  font-size:15px;
  transition:background .2s ease,color .2s ease;
}
.drawer-links a i{color:var(--primary);font-size:13px}
.drawer-links a:hover{background:rgba(36,211,238,.08);color:var(--text)}
.drawer-links a.active{background:rgba(36,211,238,.14);color:var(--text)}
.drawer-foot{padding-top:16px;border-top:1px solid var(--line)}

/* ---------- 通用板块 ---------- */
main{position:relative;z-index:1}
.section{padding:96px 0}
.section--tight{padding:64px 0}
@media (max-width:991px){.section{padding:72px 0}.section--tight{padding:56px 0}}
@media (max-width:575px){.section{padding:56px 0}.section--tight{padding:48px 0}}

.sec-head{max-width:760px;margin-bottom:44px}
.sec-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 13px;margin-bottom:16px;
  border-radius:8px;
  background:rgba(36,211,238,.1);
  border:1px solid rgba(36,211,238,.24);
  color:var(--primary);
  font-size:12px;letter-spacing:.5px;font-weight:600;
}
.sec-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:15.5px}
.sec-head--split{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.sec-title-line{display:flex;align-items:center;gap:14px}
.sec-title-line::after{
  content:"";flex:1;height:1px;
  background:linear-gradient(90deg,rgba(120,160,220,.18),rgba(120,160,220,0));
}

/* ---------- 分类页 Hero ---------- */
.cat-hero{
  position:relative;
  padding:56px 0 72px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(180deg,rgba(7,11,24,.82),rgba(7,11,24,.95)),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  opacity:.9;
  z-index:0;
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,160,220,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,220,.07) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.5;
  pointer-events:none;
  z-index:0;
}
.cat-hero .container{position:relative;z-index:2}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb i{font-size:10px;opacity:.6}
.crumb span.current{color:var(--primary);font-weight:600}
.cat-hero h1{
  font-size:clamp(28px,4.2vw,44px);
  line-height:1.24;
  font-weight:800;
  letter-spacing:-.5px;
  max-width:900px;
}
.cat-hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.cat-hero .lead{
  margin-top:18px;
  max-width:720px;
  color:var(--muted);
  font-size:16px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:14px;
  margin-top:36px;
}
.stat-chip{
  flex:1 1 180px;
  min-width:160px;
  padding:16px 18px;
  border-radius:var(--r-card);
  background:var(--bg-2);
  border:1px solid var(--border);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  position:relative;
  overflow:hidden;
}
.stat-chip::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:var(--grad);opacity:.65;
}
.stat-chip strong{
  display:block;
  font-size:22px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.4px;
}
.stat-chip span{font-size:13px;color:var(--muted)}

/* ---------- 自查清单 ---------- */
.check-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.check-card{
  position:relative;
  padding:26px 22px;
  border-radius:var(--r-card);
  background:var(--bg-2);
  border:1px solid var(--border);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease,border-color .22s ease;
}
.check-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:var(--grad);opacity:.5;
  transition:opacity .22s ease;
}
.check-card:hover{transform:translateY(-4px);border-color:rgba(36,211,238,.45)}
.check-card:hover::before{opacity:1}
.check-num{
  display:block;
  font-size:34px;
  font-weight:800;
  line-height:1;
  font-variant-numeric:tabular-nums;
  letter-spacing:-1px;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:16px;
}
.check-card h3{font-size:17px;margin-bottom:10px}
.check-card p{font-size:14px;color:var(--muted)}
@media (max-width:991px){.check-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:575px){.check-grid{grid-template-columns:1fr;gap:16px}}

/* ---------- 双栏对照 ---------- */
.compare-row{align-items:stretch}
.compare-col{
  height:100%;
  border-radius:var(--r-glass);
  border:1px solid var(--border);
  background:var(--bg-2);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  padding:30px 26px;
  position:relative;
  overflow:hidden;
}
.compare-col::before{content:"";position:absolute;left:0;right:0;top:0;height:2px}
.compare-col--good::before{background:var(--grad)}
.compare-col--care::before{background:linear-gradient(90deg,#FF6A3D,rgba(255,106,61,0))}
.compare-col--care{border-color:rgba(255,106,61,.22)}
.compare-head{padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:8px}
.compare-badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 12px;border-radius:8px;
  font-size:12px;font-weight:600;letter-spacing:.5px;
  margin-bottom:14px;
}
.compare-badge--good{background:rgba(36,211,238,.12);border:1px solid rgba(36,211,238,.3);color:var(--primary)}
.compare-badge--care{background:rgba(255,106,61,.12);border:1px solid rgba(255,106,61,.3);color:#FF9A78}
.compare-head h3{font-size:20px}
.compare-head p{margin-top:10px;font-size:14px;color:var(--muted)}

.point-list li{
  display:flex;gap:16px;
  padding:20px 0;
  border-bottom:1px dashed var(--line);
}
.point-list li:last-child{border-bottom:none;padding-bottom:0}
.point-idx{
  flex:0 0 42px;
  height:42px;
  display:grid;place-items:center;
  border-radius:12px;
  font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;
  background:rgba(36,211,238,.1);
  border:1px solid rgba(36,211,238,.24);
  color:var(--primary);
}
.point-list--care .point-idx{
  background:rgba(255,106,61,.1);
  border-color:rgba(255,106,61,.26);
  color:#FF9A78;
}
.point-list h4{font-size:16px;margin-bottom:6px}
.point-list p{font-size:14px;color:var(--muted)}

/* ---------- 图文区块 ---------- */
.media-block{
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,6fr);
  gap:44px;
  align-items:center;
}
.media-figure{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
  aspect-ratio:16/11;
}
.media-figure img{width:100%;height:100%;object-fit:cover}
.media-figure::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,24,.16),rgba(7,11,24,.72));
  pointer-events:none;
}
.media-caption{
  position:absolute;left:18px;right:18px;bottom:16px;
  z-index:2;
  font-size:13px;
  color:#DCE5F5;
}
.media-body h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:16px}
.media-body > p{color:var(--muted);font-size:15.5px;margin-bottom:22px}
.mini-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:11px 0;
  font-size:14.5px;
  color:#CBD6E8;
}
.mini-list i{color:var(--accent);font-size:13px;margin-top:6px}
@media (max-width:991px){
  .media-block{grid-template-columns:1fr;gap:28px}
}

/* ---------- FAQ ---------- */
.faq-list{
  border-radius:var(--r-glass);
  border:1px solid var(--border);
  background:linear-gradient(180deg,rgba(18,28,50,.5),rgba(11,18,36,.72));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.08);
  overflow:hidden;
}
.faq-item + .faq-item{border-top:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 24px;
  background:transparent;
  border:none;
  color:var(--text);
  font-size:16px;font-weight:700;
  text-align:left;
  cursor:pointer;
  transition:background .22s ease,color .22s ease;
}
.faq-q:hover{background:rgba(36,211,238,.06)}
.faq-item.open .faq-q{color:var(--primary)}
.faq-icon{
  position:relative;
  flex:0 0 22px;width:22px;height:22px;
  border-radius:50%;
  border:1px solid rgba(36,211,238,.4);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--primary);
  transition:transform .22s ease,opacity .22s ease;
}
.faq-icon::before{width:10px;height:1.6px;transform:translate(-50%,-50%)}
.faq-icon::after{width:1.6px;height:10px;transform:translate(-50%,-50%)}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .22s ease,padding .22s ease;
  padding:0 24px;
}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 22px}
.faq-a p{font-size:14.5px;color:var(--muted)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  border-radius:24px;
  border:1px solid rgba(36,211,238,.24);
  background:
    radial-gradient(520px 260px at 88% 0%,rgba(36,211,238,.18),transparent 70%),
    linear-gradient(160deg,rgba(18,28,50,.85),rgba(9,14,30,.92));
  padding:48px 40px;
  overflow:hidden;
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.08);
}
.cta-band::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--grad);
}
.cta-band h2{font-size:clamp(22px,2.7vw,32px);margin-bottom:14px}
.cta-band p{color:var(--muted);font-size:15.5px;max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.cta-note{margin-top:16px;font-size:13px;color:var(--muted)}
@media (max-width:575px){
  .cta-band{padding:34px 22px;border-radius:20px}
  .cta-actions .btn-glow,.cta-actions .btn-ghost{width:100%}
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:40px;
  background:#05080F;
  border-top:1px solid var(--line);
  padding:64px 0 28px;
  z-index:1;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:var(--grad);opacity:.6;
}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.foot-desc{font-size:14px;color:var(--muted);margin-bottom:14px;max-width:380px}
.foot-kw{font-size:13px;color:rgba(147,163,189,.75)}
.foot-title{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text)}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-links a,.foot-links span{font-size:14px;color:var(--muted)}
.foot-links a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px}
.foot-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  margin-top:44px;padding-top:22px;
  border-top:1px solid var(--line);
  font-size:13px;color:rgba(147,163,189,.8);
}
.foot-diamond{display:inline-flex;gap:7px;color:rgba(36,211,238,.5);font-size:8px}
@media (max-width:991px){
  .foot-bottom{flex-direction:column;align-items:flex-start;text-align:left}
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:14px;
  border:1px solid rgba(36,211,238,.4);
  background:rgba(11,18,36,.86);
  backdrop-filter:blur(10px);
  color:var(--primary);
  cursor:pointer;
  opacity:0;visibility:hidden;
  transform:translateY(10px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease,border-color .22s ease;
  z-index:900;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--primary);color:var(--text)}
@media (max-width:575px){.to-top{right:14px;bottom:18px;width:42px;height:42px}}

/* ---------- 响应式导航 ---------- */
@media (max-width:1199px){
  .nav-pill{padding:8px 11px;font-size:13px}
  .nav-pill span{font-size:13px}
}
@media (max-width:991px){
  .nav-capsules{display:none}
  .nav-toggle{display:inline-grid;place-items:center}
  .nav-actions .btn-ghost,.nav-actions .btn-glow{display:none}
  .nav-wrap{justify-content:space-between}
}
@media (max-width:575px){
  .container{padding-left:16px;padding-right:16px}
  .brand-main{font-size:15px}
  .brand-sub{font-size:10.5px}
  .hero-stats{gap:12px}
  .stat-chip{flex:1 1 100%}
}