/* roulang page: index */
:root{
  --bg:#070E18;
  --panel:#0C1626;
  --raise:#111E33;
  --primary:#3D7BFF;
  --primary-soft:rgba(61,123,255,.16);
  --amber:#FFA23A;
  --cyan:#27E0C8;
  --rose:#FF5C7A;
  --text:#E8EEF9;
  --text-2:#A8B6CC;
  --text-3:#7486A0;
  --line:rgba(140,190,255,.14);
  --line-strong:rgba(140,190,255,.28);
  --glass:rgba(255,255,255,.045);
  --glass-2:rgba(255,255,255,.07);
  --top-hi:rgba(255,255,255,.08);
  --r-card:16px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
  --shadow-hi:0 14px 34px rgba(0,0,0,.55);
  --glow-amber:0 0 24px rgba(255,162,58,.32);
  --glow-blue:0 0 24px rgba(61,123,255,.28);
  --container:1200px;
  --gap:24px;
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1100px 620px at 82% -8%, rgba(61,123,255,.16), transparent 62%),
    radial-gradient(760px 420px at 4% 12%, rgba(39,224,200,.07), transparent 60%),
    var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:#6FA2FF;}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:.01em;font-weight:700;}
p{margin:0 0 18px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(61,123,255,.35);}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-2);letter-spacing:.08em;
  font-variant-numeric:tabular-nums;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);display:inline-block;}
.section{padding:var(--sec) 0;position:relative;}
.section--panel{background:linear-gradient(180deg,rgba(12,22,38,.9),rgba(7,14,24,.9));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:44px;}
.section-title{font-size:32px;letter-spacing:.01em;}
.section-sub{color:var(--text-2);font-size:15px;margin-top:12px;max-width:640px;}
.section-link{font-size:14px;display:inline-flex;align-items:center;gap:6px;color:var(--primary);}
.section-link:hover{gap:10px;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px) scale(.995);}
.btn--amber{background:linear-gradient(135deg,#FFB559,#FF8A1F);color:#231200;box-shadow:var(--glow-amber);}
.btn--amber:hover{box-shadow:0 0 30px rgba(255,162,58,.45);color:#231200;transform:translateY(-2px);}
.btn--glass{background:var(--glass);border:1px solid var(--line-strong);color:var(--text);backdrop-filter:blur(8px);}
.btn--glass:hover{border-color:var(--primary);color:#fff;background:var(--glass-2);transform:translateY(-2px);}
.btn--ghost{color:var(--primary);height:auto;padding:0;font-weight:600;}
.btn--ghost::after{content:"→";transition:transform .2s ease;}
.btn--ghost:hover::after{transform:translateX(4px);}
.btn--sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none;}

/* ===== 徽章 / 标签 ===== */
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:4px 12px;border-radius:999px;font-size:13px;
  background:var(--glass);border:1px solid var(--line);color:var(--text-2);
  white-space:nowrap;
}
.badge i{width:6px;height:6px;border-radius:50%;background:var(--cyan);display:block;}
.badge--amber{border-color:rgba(255,162,58,.35);color:var(--amber);background:rgba(255,162,58,.08);}
.badge--amber i{background:var(--amber);}
.badge--cyan{border-color:rgba(39,224,200,.3);color:var(--cyan);background:rgba(39,224,200,.07);}
.badge--cyan i{background:var(--cyan);}
.badge--rose{border-color:rgba(255,92,122,.35);color:var(--rose);background:rgba(255,92,122,.08);}
.badge--rose i{background:var(--rose);}

/* ===== 顶部活动条 ===== */
.topbar{
  background:linear-gradient(90deg,rgba(61,123,255,.16),rgba(255,162,58,.12) 60%,rgba(39,224,200,.1));
  border-bottom:1px solid var(--line);
  font-size:14px;
  position:relative;z-index:60;
}
.topbar.is-hidden{display:none;}
.topbar-inner{display:flex;align-items:center;gap:20px;height:46px;}
.marquee{flex:1;overflow:hidden;position:relative;height:22px;mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);}
.marquee-track{display:flex;gap:56px;white-space:nowrap;animation:marquee 26s linear infinite;color:var(--text-2);}
.marquee-track span{display:inline-flex;align-items:center;gap:8px;}
.marquee-track span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--primary);}
@keyframes marquee{from{transform:translateX(0);}to{transform:translateX(-50%);}}
.countdown{display:inline-flex;align-items:center;gap:6px;font-variant-numeric:tabular-nums;letter-spacing:.08em;color:var(--text);font-size:14px;}
.countdown b{color:var(--amber);font-weight:700;}
.topbar-close{color:var(--text-3);font-size:16px;line-height:1;padding:6px;border-radius:8px;}
.topbar-close:hover{color:var(--text);background:var(--glass);}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(7,14,24,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:padding .25s ease,background .25s ease;
}
.site-header.is-scrolled{background:rgba(7,14,24,.92);box-shadow:0 10px 30px rgba(0,0,0,.4);}
.header-inner{display:flex;align-items:center;gap:28px;height:76px;transition:height .25s ease;}
.site-header.is-scrolled .header-inner{height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:19px;letter-spacing:.02em;}
.brand:hover{color:#fff;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  background:linear-gradient(135deg,var(--primary),#1B4CD8);
  display:grid;place-items:center;color:#fff;font-size:14px;font-weight:800;
  box-shadow:var(--glow-blue);letter-spacing:0;
}
.brand small{display:block;font-size:11px;color:var(--text-3);font-weight:400;letter-spacing:.14em;}
.nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);font-weight:500;transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--text);background:var(--glass);}
.nav-link.is-active{color:#fff;}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--cyan));
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:14px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:var(--glass);color:var(--text);place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* 抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);z-index:90;
  background:linear-gradient(180deg,#0B1524,#070E18);
  border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .3s cubic-bezier(.4,0,.2,1);
  padding:24px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);color:var(--text-2);}
.drawer-link{padding:13px 14px;border-radius:12px;color:var(--text-2);font-size:15px;border:1px solid transparent;}
.drawer-link:hover,.drawer-link.is-active{color:#fff;background:var(--glass);border-color:var(--line);}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);color:var(--text-3);font-size:13px;line-height:1.9;}
.drawer-mask{position:fixed;inset:0;background:rgba(3,7,14,.68);z-index:80;opacity:0;pointer-events:none;transition:opacity .3s ease;}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}

/* ===== Hero ===== */
.hero{position:relative;padding:72px 0 var(--sec);overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(140,190,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(140,190,255,.06) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(70% 60% at 50% 30%,#000,transparent 78%);
  pointer-events:none;
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;}
.hero-title{font-size:44px;line-height:1.22;margin:20px 0 0;}
.hero-title em{font-style:normal;color:var(--amber);}
.hero-sub{color:var(--text-2);font-size:17px;margin-top:20px;max-width:560px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:28px;margin-top:40px;padding-top:26px;border-top:1px solid var(--line);}
.hero-meta div{min-width:110px;}
.hero-meta strong{display:block;font-size:26px;font-variant-numeric:tabular-nums;background:linear-gradient(120deg,#fff,#8FB6FF);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-meta span{font-size:13px;color:var(--text-3);}
.hero-panel{
  position:relative;border-radius:20px;overflow:hidden;
  border:1px solid var(--line-strong);
  background-image:linear-gradient(180deg,rgba(7,14,24,.4),rgba(7,14,24,.92)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-hi);
  min-height:420px;display:flex;flex-direction:column;justify-content:flex-end;
  padding:28px;
}
.hero-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--top-hi),transparent);
}
.hero-panel-tabs{position:absolute;top:24px;left:28px;display:flex;gap:8px;}
.hero-panel h2{font-size:24px;margin-top:6px;}
.hero-panel p{color:var(--text-2);font-size:14px;margin:12px 0 0;}
.hero-panel-foot{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line);}
.price{font-size:24px;font-weight:700;color:var(--amber);font-variant-numeric:tabular-nums;}
.price small{font-size:13px;color:var(--text-3);font-weight:400;margin-left:6px;}

/* ===== 卡片通用 ===== */
.card{
  position:relative;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  overflow:hidden;box-shadow:var(--shadow);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--top-hi),transparent);}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-strong);}
.card-media{overflow:hidden;background:var(--raise);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;border-radius:0;}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:22px;}
.card-title{font-size:18px;margin-bottom:10px;}
.card-desc{color:var(--text-2);font-size:14px;}
.spec-row{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 0;}
.spec-row li{
  font-size:13px;color:var(--text-2);padding:4px 10px;border-radius:8px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  font-variant-numeric:tabular-nums;
}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:20px;padding-top:16px;border-top:1px solid var(--line);}

/* ===== 爆款网格（1 大卡 + 3 标准卡） ===== */
.showcase-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;grid-template-rows:auto auto;gap:var(--gap);}
.showcase-grid .card--hero{grid-row:span 2;display:flex;flex-direction:column;}
.showcase-grid .card--hero .card-media{height:280px;flex:none;}
.showcase-grid .card--hero .card-body{flex:1;display:flex;flex-direction:column;}
.showcase-grid .card--hero .card-title{font-size:22px;}
.showcase-grid .card--wide{grid-column:span 2;}
.showcase-grid .card--wide .card-body{display:flex;align-items:center;gap:24px;flex-wrap:wrap;}
.showcase-grid .card--wide .card-body>div:first-child{flex:1;min-width:220px;}
.showcase-grid .card--wide .card-media{display:none;}

/* ===== 能力参数 ===== */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);}
.stat{
  padding:26px;border-radius:var(--r-card);border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.02));
}
.stat strong{display:block;font-size:30px;font-variant-numeric:tabular-nums;color:#fff;}
.stat strong em{font-style:normal;font-size:16px;color:var(--primary);margin-left:4px;}
.stat span{display:block;font-size:14px;color:var(--text-3);margin-top:8px;}
.stat p{font-size:14px;color:var(--text-2);margin:12px 0 0;}

/* ===== 保障条 ===== */
.assure{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;}
.assure-item{background:rgba(12,22,38,.75);padding:24px;display:flex;gap:14px;align-items:flex-start;}
.assure-icon{
  width:40px;height:40px;flex:none;border-radius:11px;display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);font-size:16px;font-weight:700;
}
.assure-item h3{font-size:16px;margin-bottom:6px;}
.assure-item p{font-size:13px;color:var(--text-3);margin:0;line-height:1.7;}

/* ===== 评价轮播 ===== */
.reviews{position:relative;}
.review-track{
  display:flex;gap:var(--gap);overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:8px;scrollbar-width:none;cursor:grab;
}
.review-track::-webkit-scrollbar{display:none;}
.review-card{
  flex:0 0 calc((100% - var(--gap) * 2) / 3);
  scroll-snap-align:start;
  padding:26px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
}
.review-card--wide{flex-basis:calc((100% - var(--gap)) / 3 * 1.18);}
.review-top{display:flex;align-items:center;gap:12px;}
.avatar{
  width:44px;height:44px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(61,123,255,.35),rgba(39,224,200,.25));
  color:#fff;font-weight:600;font-size:15px;border:1px solid var(--line-strong);
}
.review-top b{display:block;font-size:15px;}
.review-top span{display:block;font-size:13px;color:var(--text-3);}
.stars{color:var(--amber);font-size:13px;letter-spacing:2px;margin:14px 0 10px;}
.review-card p{font-size:15px;color:var(--text-2);line-height:1.85;}
.review-nav{display:flex;align-items:center;gap:12px;}
.review-arrow{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--line-strong);
  background:var(--glass);color:var(--text);display:grid;place-items:center;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.review-arrow:hover{background:var(--primary-soft);border-color:var(--primary);color:#fff;}
.dots{display:flex;gap:8px;justify-content:center;margin-top:26px;}
.dots button{width:8px;height:8px;border-radius:50%;background:rgba(140,190,255,.24);transition:width .25s ease,background .25s ease;}
.dots button.is-active{width:26px;border-radius:4px;background:var(--primary);}

/* ===== 资讯列表（CMS） ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.news-card{display:flex;flex-direction:column;height:100%;}
.news-cover{height:168px;background:var(--raise);overflow:hidden;position:relative;}
.news-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s ease;}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.news-title{
  font-size:17px;margin:12px 0 10px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-excerpt{
  font-size:14px;color:var(--text-2);line-height:1.75;
  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:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;
}
.empty-state{
  grid-column:1/-1;min-height:240px;border-radius:var(--r-card);
  border:1px dashed var(--line-strong);background:var(--glass);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  text-align:center;padding:36px;color:var(--text-3);
}
.empty-state svg{opacity:.6;}

/* ===== FAQ ===== */
.faq{display:grid;gap:12px;max-width:900px;}
.faq-item{
  border-radius:14px;border:1px solid var(--line);background:var(--glass);
  overflow:hidden;transition:border-color .25s ease,background .25s ease;
}
.faq-item[open]{border-color:var(--line-strong);background:rgba(255,255,255,.06);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 24px 20px 22px;
  display:flex;align-items:center;gap:14px;font-size:16px;font-weight:600;
  position:relative;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";width:3px;height:20px;border-radius:2px;background:var(--primary);flex:none;
}
.faq-item summary::after{
  content:"+";margin-left:auto;font-size:20px;color:var(--text-3);line-height:1;
  transition:transform .22s ease,color .22s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--amber);}
.faq-body{padding:0 24px 22px 39px;color:var(--text-2);font-size:15px;}

/* ===== CTA ===== */
.cta-band{
  border-radius:20px;border:1px solid var(--line-strong);
  background:
    radial-gradient(600px 300px at 12% 0%,rgba(61,123,255,.2),transparent 60%),
    radial-gradient(520px 300px at 92% 100%,rgba(255,162,58,.14),transparent 62%),
    linear-gradient(160deg,rgba(17,30,51,.95),rgba(9,17,29,.95));
  padding:52px;display:grid;grid-template-columns:1fr .85fr;gap:52px;align-items:start;
  box-shadow:var(--shadow-hi);
}
.cta-band h2{font-size:32px;}
.cta-band .lead{color:var(--text-2);margin-top:16px;font-size:16px;}
.cta-list{margin-top:26px;display:grid;gap:12px;}
.cta-list li{display:flex;gap:10px;font-size:15px;color:var(--text-2);}
.cta-list li::before{content:"✓";color:var(--cyan);font-weight:700;}
.form-grid{display:grid;gap:14px;}
.field{display:grid;gap:7px;}
.field label{font-size:13px;color:var(--text-3);}
.field input,.field select,.field textarea{
  width:100%;background:rgba(7,14,24,.7);border:1px solid var(--line);
  border-radius:12px;padding:12px 14px;font-size:15px;color:var(--text);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{min-height:96px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:#5A6B84;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:rgba(7,14,24,.95);
  box-shadow:0 0 0 3px rgba(61,123,255,.16);
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--rose);box-shadow:0 0 0 3px rgba(255,92,122,.14);}
.field .tip{font-size:12px;color:var(--rose);min-height:0;}
.form-status{font-size:13px;color:var(--text-3);min-height:20px;}
.form-status.is-ok{color:var(--cyan);}
.form-status.is-err{color:var(--rose);}
.form-note{font-size:12px;color:var(--text-3);}

/* ===== 页脚 ===== */
.site-footer{border-top:1px solid var(--line);background:linear-gradient(180deg,rgba(9,17,29,.6),rgba(5,10,18,.96));padding-top:72px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:52px;}
.footer-brand p{color:var(--text-3);font-size:14px;margin-top:16px;max-width:340px;line-height:1.9;}
.footer-col h3{font-size:15px;margin-bottom:18px;color:#fff;}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{color:var(--text-3);font-size:14px;display:inline-block;transition:color .2s ease,transform .2s ease;}
.footer-col a:hover{color:var(--primary);transform:translateX(2px);}
.footer-contact li{color:var(--text-3);font-size:14px;line-height:1.9;}
.footer-contact b{color:var(--text);font-weight:600;}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 26px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary);}
.back-to-top{
  display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:999px;
  border:1px solid var(--line-strong);color:var(--text-2);font-size:13px;background:var(--glass);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.back-to-top:hover{border-color:var(--primary);color:#fff;transform:translateY(-2px);}

/* ===== 移动端底栏 ===== */
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(9,17,29,.94);backdrop-filter:blur(12px);
  border-top:1px solid var(--line);padding:10px 14px;gap:10px;
}
.mobile-bar .btn{flex:1;height:46px;}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .hero-inner{gap:40px;}
  .hero-title{font-size:40px;}
}
@media (max-width:1023px){
  :root{--sec:72px;}
  .container{padding:0 24px;}
  .nav{display:none;}
  .nav-toggle{display:grid;}
  .hero-inner{grid-template-columns:1fr;gap:36px;}
  .hero-panel{min-height:340px;}
  .showcase-grid{grid-template-columns:repeat(2,1fr);}
  .showcase-grid .card--hero{grid-row:span 1;grid-column:span 2;}
  .showcase-grid .card--wide{grid-column:span 2;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .assure{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .cta-band{grid-template-columns:1fr;padding:40px;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .review-card,.review-card--wide{flex-basis:calc((100% - var(--gap)) / 2);}
}
@media (max-width:767px){
  :root{--sec:56px;}
  body{font-size:15px;}
  .container{padding:0 16px;}
  .header-actions .status-chip{display:none;}
  .header-actions .btn{display:none;}
  .hero{padding:44px 0 56px;}
  .hero-title{font-size:30px;}
  .hero-sub{font-size:15px;}
  .hero-cta{flex-direction:column;}
  .hero-cta .btn{width:100%;}
  .hero-meta{gap:20px;}
  .hero-meta strong{font-size:22px;}
  .section-title{font-size:24px;}
  .section-head{margin-bottom:30px;}
  .showcase-grid{grid-template-columns:1fr;}
  .showcase-grid .card--hero,.showcase-grid .card--wide{grid-column:span 1;}
  .stats-grid{grid-template-columns:1fr;}
  .assure{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .review-card,.review-card--wide{flex-basis:88%;}
  .cta-band{padding:28px;border-radius:16px;}
  .cta-band h2{font-size:24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .marquee{display:none;}
  .mobile-bar{display:flex;}
  body{padding-bottom:74px;}
  .topbar-inner{height:42px;font-size:13px;}
}
@media (max-width:479px){
  .hero-title{font-size:27px;}
  .card-body{padding:18px 14px;}
  .stat{padding:20px 16px;}
  .review-card{padding:20px 16px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category1 */
:root{
  --bg:#070E18;
  --panel:#0C1626;
  --lift:#111E33;
  --glass:rgba(255,255,255,.045);
  --top-hi:rgba(255,255,255,.08);
  --line:rgba(140,190,255,.14);
  --line-strong:rgba(140,190,255,.28);
  --primary:#3D7BFF;
  --primary-soft:rgba(61,123,255,.16);
  --amber:#FFA23A;
  --cyan:#27E0C8;
  --rose:#FF5C7A;
  --text:#E8EEFA;
  --muted:#9AAAC4;
  --muted-2:#7C8CA6;
  --radius:16px;
  --radius-sm:12px;
  --radius-lg:20px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
  --shadow-lg:0 14px 34px rgba(0,0,0,.55);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(900px 520px at 82% -8%, rgba(61,123,255,.16), transparent 62%),
    radial-gradient(640px 420px at 6% 12%, rgba(39,224,200,.07), transparent 66%);
  pointer-events:none;
  z-index:0;
}
body.nav-open{overflow:hidden}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;background:linear-gradient(140deg,#12203a,#0b1424)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid rgba(61,123,255,.75);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;position:relative;z-index:1}
.mono{font-family:"Inter","SFMono-Regular",Consolas,"Liberation Mono",monospace;font-variant-numeric:tabular-nums}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,14,24,.76);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .25s ease,border-color .25s ease;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  min-height:78px;
  transition:min-height .25s ease;
}
.site-header.is-shrunk{background:rgba(7,14,24,.92);border-bottom-color:var(--line-strong)}
.site-header.is-shrunk .header-inner{min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:#fff;white-space:nowrap}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#3D7BFF,#22C1E8);
  font-size:17px;font-weight:800;color:#04101f;
  box-shadow:0 0 20px rgba(61,123,255,.32);
  flex:0 0 auto;
}
.brand small{display:block;font-size:11.5px;font-weight:500;color:var(--muted-2);letter-spacing:.06em;line-height:1.4}
.nav{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;
  padding:9px 14px;
  font-size:15px;
  color:var(--muted);
  border-radius:10px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:#fff;background:var(--glass)}
.nav-link.is-active{color:#fff}
.nav-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:18px;height:2px;border-radius:2px;background:var(--primary);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.status-chip{font-size:13px}
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 12px;border-radius:999px;
  font-size:13px;line-height:1.4;
  background:var(--glass);border:1px solid var(--line);
  color:var(--muted);white-space:nowrap;
}
.badge i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px rgba(39,224,200,.7);flex:0 0 auto}
.badge--cyan{color:var(--cyan)}
.badge--amber{color:var(--amber);border-color:rgba(255,162,58,.3);background:rgba(255,162,58,.08)}
.badge--amber i{background:var(--amber);box-shadow:0 0 8px rgba(255,162,58,.7)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:var(--glass);
  position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:#dbe6f7;
  transform:translateX(-50%);transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
body.nav-open .nav-toggle span{transform:translateX(-50%) rotate(45deg)}
body.nav-open .nav-toggle span::before{opacity:0;transform:translateX(-50%) rotate(0deg)}
body.nav-open .nav-toggle span::after{transform:translateX(-50%) rotate(-90deg);top:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1.4;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn--amber{
  background:linear-gradient(135deg,#FFB055,#FF8A1E);
  color:#221202;
  box-shadow:0 0 24px rgba(255,162,58,.3);
}
.btn--amber:hover{transform:translateY(-2px);box-shadow:0 0 30px rgba(255,162,58,.42)}
.btn--amber:active{transform:translateY(0);box-shadow:0 0 14px rgba(255,162,58,.28)}
.btn--glass{
  background:var(--glass);border-color:var(--line-strong);color:var(--text);
}
.btn--glass:hover{transform:translateY(-2px);border-color:rgba(140,190,255,.5);box-shadow:0 10px 26px rgba(0,0,0,.4)}
.btn--ghost{color:var(--primary);padding-left:6px;padding-right:6px}
.btn--ghost:hover{color:#6ea1ff}
.btn--sm{padding:9px 16px;font-size:14px}
.btn--block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none}

/* ============ Hero ============ */
.page-hero{padding:44px 0 76px}
.hero-card{
  display:grid;
  grid-template-columns:1.02fr .98fr;
  gap:0;
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.018));
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  position:relative;
}
.hero-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.28),transparent);
}
.hero-copy{padding:48px 44px;display:flex;flex-direction:column;gap:20px;justify-content:center}
.hero-eyebrow{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.hero-copy h1{font-size:42px;line-height:1.3;font-weight:700}
.hero-copy h1 em{font-style:normal;color:var(--primary)}
.hero-sub{font-size:16.5px;color:var(--muted);line-height:1.85;max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:4px}
.hero-meta{display:flex;flex-wrap:wrap;gap:22px;padding-top:14px;border-top:1px solid var(--line)}
.hero-meta div{font-size:13px;color:var(--muted-2)}
.hero-meta b{display:block;font-size:20px;color:#fff;font-weight:700;line-height:1.4}
.hero-media{position:relative;min-height:380px;background:#0a1322}
.hero-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(7,14,24,.94) 0%,rgba(7,14,24,.34) 38%,rgba(7,14,24,.18) 100%),
    repeating-linear-gradient(90deg,rgba(140,190,255,.07) 0 1px,transparent 1px 72px),
    repeating-linear-gradient(0deg,rgba(140,190,255,.06) 0 1px,transparent 1px 72px);
}
.hero-tag{
  position:absolute;right:18px;bottom:18px;z-index:3;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;
  background:rgba(7,14,24,.72);border:1px solid var(--line-strong);
  font-size:13px;color:#dce7fa;backdrop-filter:blur(8px);
}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--cyan)}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section--tight{padding:64px 0}
.section--band{background:linear-gradient(180deg,rgba(12,22,38,.86),rgba(7,14,24,.4));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:32px;line-height:1.35;font-weight:700;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--primary);margin-bottom:14px;font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--primary);border-radius:2px}

/* ============ 指标条 ============ */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat-card{
  padding:26px 24px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow);
  position:relative;overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.stat-card::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:var(--top-hi)}
.stat-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-lg)}
.stat-card b{display:block;font-size:34px;font-weight:700;line-height:1.25;color:#fff}
.stat-card b span{font-size:17px;color:var(--amber);margin-left:3px}
.stat-card p{margin-top:8px;font-size:14px;color:var(--muted)}

/* ============ 左侧粘性栏 + 右侧内容 ============ */
.split{display:grid;grid-template-columns:272px 1fr;gap:52px;align-items:start}
.split-aside{position:sticky;top:112px;display:flex;flex-direction:column;gap:22px}
.aside-card{
  padding:24px 22px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.aside-card h3{font-size:15px;color:#fff;margin-bottom:14px;letter-spacing:.04em}
.toc li+li{margin-top:2px}
.toc a{
  display:flex;align-items:center;gap:10px;
  padding:8px 10px;border-radius:10px;font-size:14px;color:var(--muted);
  transition:color .2s ease,background .2s ease,transform .2s ease;
}
.toc a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--muted-2);flex:0 0 auto;transition:background .2s ease}
.toc a:hover{color:#fff;background:var(--glass);transform:translateX(2px)}
.toc a:hover::before{background:var(--primary)}
.aside-note{font-size:13px;color:var(--muted-2);line-height:1.75}
.aside-cta{
  padding:22px;border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(61,123,255,.16),rgba(255,162,58,.07));
  border:1px solid var(--line-strong);
}
.aside-cta h3{font-size:16px;color:#fff;margin-bottom:8px}
.aside-cta p{font-size:13.5px;color:var(--muted);margin-bottom:16px}

/* ============ 图文交替 ============ */
.feature-row{
  display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;
  padding:28px 0;
}
.feature-row+.feature-row{border-top:1px solid var(--line)}
.feature-row.is-reverse .feature-copy{order:2}
.feature-figure{
  border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
  position:relative;
}
.feature-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s ease}
.feature-figure:hover img{transform:scale(1.03)}
.feature-figure figcaption{
  padding:12px 16px;font-size:13px;color:var(--muted-2);
  background:rgba(7,14,24,.7);border-top:1px solid var(--line);
}
.feature-copy h3{font-size:21px;font-weight:700;margin-bottom:12px}
.feature-copy p{color:var(--muted);font-size:15.5px}
.feature-list{margin-top:16px;display:grid;gap:10px}
.feature-list li{position:relative;padding-left:20px;font-size:14.5px;color:#cdd9ec}
.feature-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 8px rgba(61,123,255,.6);
}

/* ============ 参数条 ============ */
.meter-panel{
  margin-top:34px;padding:30px 28px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);
}
.meter-panel h3{font-size:18px;margin-bottom:6px}
.meter-panel>p{font-size:14px;color:var(--muted);margin-bottom:22px}
.meter+.meter{margin-top:20px}
.meter-head{display:flex;justify-content:space-between;align-items:baseline;font-size:14.5px;margin-bottom:9px}
.meter-head span{color:#cdd9ec}
.meter-head b{font-size:16px;color:var(--amber);font-weight:700}
.meter-track{height:8px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden}
.meter-track i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#2E63DA,#5B95FF)}
.meter-track i.is-cyan{background:linear-gradient(90deg,#1FA997,#27E0C8)}
.meter-track i.is-amber{background:linear-gradient(90deg,#E08A2A,#FFA23A)}

/* ============ 场景卡片 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene-card{
  border-radius:var(--radius);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.scene-card::before{content:"";display:block;height:1px;background:var(--top-hi)}
.scene-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-lg)}
.scene-thumb{position:relative;overflow:hidden}
.scene-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease}
.scene-card:hover .scene-thumb img{transform:scale(1.04)}
.scene-thumb .badge{position:absolute;left:12px;top:12px;background:rgba(7,14,24,.78);backdrop-filter:blur(6px)}
.scene-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.scene-body h3{font-size:18px}
.scene-body p{font-size:14.5px;color:var(--muted)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px}
.tag{
  font-size:12.5px;padding:4px 11px;border-radius:999px;
  background:rgba(61,123,255,.12);border:1px solid rgba(61,123,255,.28);color:#9dbcff;
}
.tag--cyan{background:rgba(39,224,200,.1);border-color:rgba(39,224,200,.28);color:var(--cyan)}

/* ============ 流程 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.step{
  padding:26px 22px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease;
}
.step:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;margin-bottom:16px;
  font-size:15px;font-weight:700;color:#cfdcf3;
  background:rgba(61,123,255,.14);border:1px solid rgba(61,123,255,.3);
}
.step h3{font-size:17px;margin-bottom:10px}
.step p{font-size:14px;color:var(--muted)}
.step small{display:block;margin-top:14px;font-size:12.5px;color:var(--amber)}

/* ============ FAQ ============ */
.faq{display:grid;gap:14px;max-width:900px}
.faq-item{
  border-radius:var(--radius);border:1px solid var(--line);
  background:var(--glass);overflow:hidden;
  transition:border-color .22s ease,background .22s ease;
}
.faq-item[open]{border-color:var(--line-strong);background:rgba(255,255,255,.06)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:20px 58px 20px 22px;
  font-size:16.5px;font-weight:600;color:#e9f0fc;
  border-left:3px solid transparent;
  transition:border-color .22s ease,color .22s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:#fff}
.faq-item[open] summary{border-left-color:var(--primary)}
.faq-item summary::after{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--primary);line-height:1;
  transition:transform .22s ease;
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-body{padding:0 24px 22px 25px;color:var(--muted);font-size:15px}

/* ============ CTA / 表单 ============ */
.cta-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;
  padding:48px 44px;border-radius:var(--radius-lg);
  background:linear-gradient(150deg,rgba(61,123,255,.14),rgba(12,22,38,.92) 46%,rgba(255,162,58,.08));
  border:1px solid var(--line-strong);box-shadow:var(--shadow-lg);
  position:relative;overflow:hidden;
}
.cta-wrap::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(90deg,rgba(140,190,255,.05) 0 1px,transparent 1px 90px);
  pointer-events:none;
}
.cta-copy{position:relative}
.cta-copy h2{font-size:30px;line-height:1.35;margin-bottom:14px}
.cta-copy p{color:var(--muted);font-size:15.5px;max-width:32em}
.cta-points{margin-top:24px;display:grid;gap:12px}
.cta-points li{position:relative;padding-left:24px;font-size:14.5px;color:#d3dff2}
.cta-points li::before{
  content:"✓";position:absolute;left:0;top:0;color:var(--cyan);font-size:14px;
}
.form-card{
  position:relative;padding:28px;border-radius:var(--radius);
  background:rgba(7,14,24,.6);border:1px solid var(--line);backdrop-filter:blur(8px);
}
.form-card h3{font-size:18px;margin-bottom:6px}
.form-card>p{font-size:13.5px;color:var(--muted-2);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;color:#c3d0e5;margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:var(--radius-sm);
  background:var(--lift);border:1px solid var(--line);color:var(--text);
  font-size:14.5px;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{resize:vertical;min-height:88px}
.field input::placeholder,.field textarea::placeholder{color:#5f708a}
.field input:hover,.field select:hover,.field textarea:hover{border-color:var(--line-strong)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(61,123,255,.16);background:#101c30;
}
.field.has-error input,.field.has-error select{border-color:var(--rose);box-shadow:0 0 0 3px rgba(255,92,122,.14)}
.field-error{display:none;margin-top:6px;font-size:12.5px;color:var(--rose)}
.field.has-error .field-error{display:block}
.form-note{margin-top:14px;font-size:12.5px;color:var(--muted-2)}
.form-status{
  display:none;margin-top:16px;padding:12px 14px;border-radius:var(--radius-sm);
  font-size:14px;border:1px solid;
}
.form-status.is-success{display:block;color:var(--cyan);border-color:rgba(39,224,200,.36);background:rgba(39,224,200,.08)}
.form-status.is-error{display:block;color:var(--rose);border-color:rgba(255,92,122,.36);background:rgba(255,92,122,.08)}

/* ============ 面包屑 ============ */
.breadcrumb{padding:20px 0 0}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted-2)}
.breadcrumb a{color:var(--muted);transition:color .2s ease}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb li[aria-current]{color:#cfdcf3}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:40px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(12,22,38,.9),rgba(7,14,24,1));
  padding:72px 0 28px;position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:38px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--muted);max-width:34em}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--muted);transition:color .2s ease,transform .2s ease;display:inline-block}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact li{font-size:14px;color:var(--muted)}
.footer-contact b{color:#dbe6f7;font-weight:600}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--muted-2);
}
.back-to-top{color:var(--muted);transition:color .2s ease}
.back-to-top:hover{color:var(--primary)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .hero-copy h1{font-size:37px}
  .split{grid-template-columns:240px 1fr;gap:36px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav{
    position:fixed;top:0;right:0;bottom:0;width:300px;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:96px 22px 32px;
    background:rgba(9,16,28,.98);
    border-left:1px solid var(--line-strong);
    transform:translateX(102%);
    transition:transform .28s ease;
    z-index:70;overflow-y:auto;
  }
  body.nav-open .nav{transform:translateX(0)}
  .nav-link{padding:13px 14px;font-size:16px;border-radius:12px;background:rgba(255,255,255,.03)}
  .nav-link.is-active::after{display:none}
  .nav-toggle{display:block;margin-left:auto;z-index:80}
  .status-chip{display:none}
  .hero-card{grid-template-columns:1fr}
  .hero-media{min-height:280px;order:-1}
  .hero-media::after{background:linear-gradient(180deg,rgba(7,14,24,.2),rgba(7,14,24,.86))}
  .split{grid-template-columns:1fr}
  .split-aside{position:static}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .cta-wrap{grid-template-columns:1fr;padding:38px 30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
}
@media (max-width:767px){
  body{font-size:15px}
  .container{padding:0 16px}
  .header-inner{min-height:66px;gap:14px}
  .brand{font-size:16.5px}
  .brand small{display:none}
  .header-actions .btn--sm{display:none}
  .page-hero{padding:28px 0 52px}
  .hero-copy{padding:30px 22px 34px;gap:16px}
  .hero-copy h1{font-size:28px}
  .hero-sub{font-size:15px}
  .hero-actions{gap:12px}
  .hero-actions .btn{flex:1 1 100%}
  .hero-media{min-height:210px}
  .feature-row{grid-template-columns:1fr;gap:22px;padding:22px 0}
  .feature-row.is-reverse .feature-copy{order:0}
  .section{padding:56px 0}
  .section-head{margin-bottom:30px}
  .section-head h2{font-size:24px}
  .stat-grid{gap:12px}
  .stat-card{padding:20px 16px}
  .stat-card b{font-size:26px}
  .scene-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .meter-panel{padding:22px 18px}
  .faq-item summary{font-size:15.5px;padding:16px 48px 16px 16px}
  .faq-body{padding:0 18px 18px 19px;font-size:14.5px}
  .cta-wrap{padding:28px 20px;gap:28px}
  .cta-copy h2{font-size:23px}
  .form-card{padding:22px 18px}
  .footer-grid{grid-template-columns:1fr}
  .site-footer{padding:52px 0 24px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:479px){
  .hero-copy h1{font-size:25px}
  .stat-card{padding:16px 14px}
  .stat-card b{font-size:23px}
  .btn{padding:11px 18px;font-size:14.5px}
  .scene-body{padding:18px 16px 20px}
  .nav{width:88vw}
}

/* roulang page: article */
:root{
  --bg:#070E18;
  --panel:#0C1626;
  --raise:#111E33;
  --glass:rgba(255,255,255,.045);
  --glass-strong:rgba(255,255,255,.07);
  --line:rgba(140,190,255,.14);
  --line-strong:rgba(140,190,255,.28);
  --top-light:rgba(255,255,255,.08);
  --primary:#3D7BFF;
  --primary-soft:rgba(61,123,255,.16);
  --amber:#FFA23A;
  --amber-deep:#F0871B;
  --cyan:#27E0C8;
  --rose:#FF5C7A;
  --text:#E8EEF9;
  --text-2:#B9C7DE;
  --muted:#8595B0;
  --radius:16px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
  --shadow-hover:0 14px 34px rgba(0,0,0,.55);
  --container:1200px;
  --gap:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1100px 620px at 82% -12%, rgba(61,123,255,.16), transparent 62%),
    radial-gradient(760px 460px at 4% 4%, rgba(39,224,200,.08), transparent 60%),
    var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--primary);text-decoration:none;transition:color .22s var(--ease),opacity .22s var(--ease);}
a:hover{color:#6C9BFF;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(61,123,255,.4);}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
.band{padding:96px 0;}
.band--tight{padding:72px 0;}
.band--panel{background:linear-gradient(180deg,rgba(12,22,38,.92),rgba(7,14,24,.92));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.section-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;font-weight:700;}
.section-head p{color:var(--muted);font-size:14px;max-width:620px;margin-top:10px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.14em;color:var(--cyan);text-transform:uppercase;font-family:Inter,ui-monospace,monospace;}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);opacity:.7;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,14,24,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{background:rgba(7,14,24,.94);border-bottom-color:var(--line);box-shadow:0 10px 30px rgba(0,0,0,.45);}
.header-inner{display:flex;align-items:center;gap:28px;min-height:76px;}
.site-header.is-scrolled .header-inner{min-height:64px;}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--text);font-weight:700;font-size:19px;letter-spacing:.01em;}
.brand:hover{color:var(--text);}
.brand small{display:block;font-size:11px;font-weight:400;color:var(--muted);letter-spacing:.18em;line-height:1.4;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  display:grid;place-items:center;font-family:Inter,ui-monospace,monospace;
  font-size:18px;font-weight:700;color:#fff;
  background:linear-gradient(140deg,#3D7BFF,#1B47A8);
  box-shadow:0 6px 18px rgba(61,123,255,.35),inset 0 1px 0 rgba(255,255,255,.28);
}
.nav{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;padding:9px 14px;border-radius:10px;
  color:var(--text-2);font-size:14.5px;white-space:nowrap;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .26s var(--ease);
}
.nav-link:hover{color:var(--text);background:var(--glass);}
.nav-link.is-active{color:var(--text);}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:8px;}
.status-chip{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--cyan);}
.status-chip i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(39,224,200,.16);animation:pulse 2.4s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:11px;border:1px solid var(--line);
  background:var(--glass);cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--text);
  transform:translateX(-50%);transition:transform .26s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;}
.nav-toggle span::after{content:"";top:6px;}
.is-nav-open .nav-toggle span{transform:translateX(-50%) rotate(45deg);}
.is-nav-open .nav-toggle span::before{transform:rotate(-90deg) translateX(-6px);opacity:0;}
.is-nav-open .nav-toggle span::after{transform:rotate(-90deg) translateX(6px);opacity:0;}

/* ---------- buttons / badges ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--radius-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease);
}
.btn--sm{padding:10px 18px;font-size:14px;}
.btn--amber{
  background:linear-gradient(140deg,#FFB559,var(--amber-deep));
  color:#2A1600;
  box-shadow:0 0 24px rgba(255,162,58,.32),inset 0 1px 0 rgba(255,255,255,.4);
}
.btn--amber:hover{transform:translateY(-2px);color:#2A1600;box-shadow:0 0 30px rgba(255,162,58,.45),inset 0 1px 0 rgba(255,255,255,.45);}
.btn--amber:active{transform:translateY(0);}
.btn--glass{
  background:var(--glass);border-color:var(--line-strong);color:var(--text);
  backdrop-filter:blur(6px);
}
.btn--glass:hover{background:var(--glass-strong);border-color:rgba(140,190,255,.45);color:#fff;transform:translateY(-2px);}
.btn--ghost{background:transparent;color:var(--text-2);padding:10px 4px;}
.btn--ghost:hover{color:var(--primary);}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 12px;border-radius:var(--radius-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:var(--glass);border:1px solid var(--line);color:var(--text-2);
}
.badge--primary{color:#B9D0FF;border-color:rgba(61,123,255,.4);background:var(--primary-soft);}
.badge--amber{color:#FFD3A0;border-color:rgba(255,162,58,.38);background:rgba(255,162,58,.12);}
.badge--cyan{color:#9DF6EB;border-color:rgba(39,224,200,.34);background:rgba(39,224,200,.12);}
.badge--rose{color:#FFB7C5;border-color:rgba(255,92,122,.34);background:rgba(255,92,122,.12);}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  padding:56px 0 48px;
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(7,14,24,.94),rgba(7,14,24,.72) 62%,rgba(7,14,24,.9)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.9;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(140,190,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(140,190,255,.07) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,transparent,#000 40%,transparent);
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 40%,transparent);
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:2;}

/* ---------- breadcrumb ---------- */
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:22px;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{opacity:.5;}
.crumbs .current{color:var(--text-2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.article-title{font-size:clamp(28px,3.6vw,44px);line-height:1.32;font-weight:700;max-width:22ch;}
.article-lead{color:var(--text-2);font-size:16px;max-width:70ch;margin-top:18px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;margin-top:26px;color:var(--muted);font-size:13.5px;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong);}
.meta-num{font-family:Inter,ui-monospace,monospace;color:var(--text-2);}
.share-group{display:flex;align-items:center;gap:10px;margin-left:auto;}
.share-btn{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:var(--glass);
  font-size:13px;color:var(--text-2);cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.share-btn:hover{color:#fff;border-color:var(--line-strong);background:var(--glass-strong);}

/* ---------- layout ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,760px) 300px;
  gap:56px;
  align-items:start;
  justify-content:center;
}
.article-main{min-width:0;}
.article-cover{
  border-radius:14px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);margin-bottom:16px;background:var(--panel);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.figcaption{text-align:center;font-size:13px;color:var(--muted);margin-bottom:34px;}

/* ---------- prose ---------- */
.article-body{font-size:16px;line-height:1.9;color:var(--text-2);}
.article-body p{margin:0 0 20px;}
.article-body h2{
  position:relative;margin:44px 0 18px;padding-left:16px;
  font-size:clamp(21px,2.2vw,26px);line-height:1.4;color:var(--text);font-weight:700;
}
.article-body h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;background:linear-gradient(180deg,var(--primary),rgba(61,123,255,.25));}
.article-body h3{margin:30px 0 12px;font-size:19px;line-height:1.5;color:var(--text);font-weight:600;}
.article-body h4{margin:24px 0 10px;font-size:16.5px;color:var(--text);font-weight:600;}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:4px;}
.article-body li{position:relative;padding-left:22px;margin-bottom:11px;}
.article-body ul>li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--primary);box-shadow:0 0 0 3px rgba(61,123,255,.14);}
.article-body ol{counter-reset:prose;}
.article-body ol>li{counter-increment:prose;}
.article-body ol>li::before{
  content:counter(prose);position:absolute;left:0;top:.18em;
  font-family:Inter,ui-monospace,monospace;font-size:13px;font-weight:700;color:var(--amber);
}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;
  border-left:3px solid var(--amber);
  background:var(--glass);border-radius:0 12px 12px 0;
  color:var(--text);font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:14px;margin:26px 0;border:1px solid var(--line);}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;}
.article-body a:hover{color:#8FB4FF;}
.article-body strong{color:var(--text);font-weight:600;}
.article-body code{
  font-family:Inter,ui-monospace,monospace;font-size:14px;
  background:var(--raise);border:1px solid var(--line);border-radius:6px;padding:2px 6px;color:#B9D0FF;
}
.article-body pre{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:18px 20px;overflow-x:auto;margin:24px 0;
}
.article-body pre code{background:none;border:0;padding:0;color:var(--text-2);}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:14.5px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left;}
.article-body th{background:var(--glass);color:var(--text);font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}
.table-wrap{overflow-x:auto;margin:26px 0;-webkit-overflow-scrolling:touch;}

/* ---------- empty state ---------- */
.empty-state{
  min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  text-align:center;padding:48px 24px;
  background:var(--glass);border:1px dashed var(--line-strong);border-radius:var(--radius);
}
.empty-state .empty-icon{
  width:54px;height:54px;border-radius:16px;display:grid;place-items:center;
  background:var(--primary-soft);border:1px solid rgba(61,123,255,.35);
  font-family:Inter,ui-monospace,monospace;font-size:22px;color:#B9D0FF;
}
.empty-state strong{font-size:17px;color:var(--text);}
.empty-state p{color:var(--muted);font-size:14px;max-width:44ch;}

/* ---------- sidebar ---------- */
.sidebar{display:flex;flex-direction:column;gap:22px;position:sticky;top:104px;}
.side-card{
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px;position:relative;overflow:hidden;
}
.side-card::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,transparent,var(--top-light),transparent);}
.side-card h3{font-size:15px;font-weight:700;color:var(--text);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--primary);}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;padding:7px 10px;border-radius:8px;
  font-size:13.5px;color:var(--muted);line-height:1.6;
  border-left:2px solid transparent;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.toc-list a:hover,.toc-list a.is-current{color:var(--text);background:var(--glass);border-left-color:var(--primary);}
.hot-list li+li{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);}
.hot-list a{display:block;font-size:14px;color:var(--text-2);line-height:1.65;}
.hot-list a:hover{color:var(--primary);}
.hot-list span{display:block;font-size:12.5px;color:var(--muted);margin-top:4px;}
.side-cta{background:linear-gradient(160deg,rgba(61,123,255,.16),rgba(17,30,51,.9));border-color:rgba(61,123,255,.28);}
.side-cta p{font-size:13.5px;color:var(--text-2);margin:10px 0 16px;line-height:1.75;}
.side-cta .btn{width:100%;}
.side-cta .side-note{font-size:12px;color:var(--muted);text-align:center;margin-top:10px;}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-strong);}
.rel-card figure{margin:0;overflow:hidden;border-bottom:1px solid var(--line);}
.rel-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s var(--ease);}
.rel-card:hover img{transform:scale(1.03);}
.rel-card .rel-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-card h3{font-size:17px;line-height:1.5;color:var(--text);font-weight:600;}
.rel-card p{font-size:13.5px;color:var(--muted);line-height:1.75;}
.rel-card .rel-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--muted);}
.rel-card .rel-foot b{color:var(--primary);font-weight:600;}

/* ---------- post nav ---------- */
.post-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:44px;}
.post-nav a{
  display:flex;flex-direction:column;gap:6px;padding:20px 22px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
  color:var(--text);transition:transform .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease);
}
.post-nav a:hover{transform:translateY(-3px);border-color:var(--line-strong);background:var(--glass-strong);color:var(--text);}
.post-nav span{font-size:12.5px;letter-spacing:.1em;color:var(--muted);font-family:Inter,ui-monospace,monospace;}
.post-nav strong{font-size:16px;font-weight:600;}
.post-nav .align-end{text-align:right;align-items:flex-end;}

/* ---------- CTA ---------- */
.cta-wrap{
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  background:
    linear-gradient(120deg,rgba(61,123,255,.14),rgba(7,14,24,.6) 55%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border:1px solid var(--line);border-radius:22px;padding:48px;
  box-shadow:var(--shadow);
}
.cta-copy h2{font-size:clamp(24px,2.6vw,32px);line-height:1.34;font-weight:700;}
.cta-copy p{color:var(--text-2);margin-top:14px;font-size:15px;max-width:52ch;}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.form-card{background:rgba(9,17,30,.86);border:1px solid var(--line);border-radius:18px;padding:28px;backdrop-filter:blur(10px);}
.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;}
.field label{font-size:13px;color:var(--muted);}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:#5D6C85;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:rgba(61,123,255,.08);
  box-shadow:0 0 0 3px rgba(61,123,255,.16);
}
.field textarea{min-height:96px;resize:vertical;}
.field.is-error input,.field.is-error select{border-color:var(--rose);box-shadow:0 0 0 3px rgba(255,92,122,.14);}
.field .field-msg{font-size:12.5px;color:var(--rose);display:none;}
.field.is-error .field-msg{display:block;}
.form-status{
  margin-top:14px;font-size:13.5px;padding:10px 14px;border-radius:var(--radius-sm);
  display:none;border:1px solid transparent;
}
.form-status.is-show{display:block;}
.form-status.ok{color:#9DF6EB;background:rgba(39,224,200,.1);border-color:rgba(39,224,200,.3);}
.form-status.bad{color:#FFB7C5;background:rgba(255,92,122,.1);border-color:rgba(255,92,122,.3);}
.form-card .btn{width:100%;margin-top:4px;}

/* ---------- footer ---------- */
.site-footer{background:linear-gradient(180deg,rgba(12,22,38,.6),rgba(7,14,24,.98));border-top:1px solid var(--line);padding:72px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand p{color:var(--muted);font-size:13.5px;line-height:1.85;margin-top:16px;max-width:44ch;}
.footer-brand .brand{font-size:18px;}
.footer-col h3{font-size:14px;color:var(--text);font-weight:600;margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:var(--muted);font-size:13.5px;display:inline-block;transition:color .22s var(--ease),transform .22s var(--ease);}
.footer-col a:hover{color:var(--primary);transform:translateX(2px);}
.footer-contact li{color:var(--muted);font-size:13.5px;}
.footer-contact b{color:var(--text-2);font-weight:500;font-family:Inter,ui-monospace,monospace;}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted);
}
.back-to-top{color:var(--text-2);}
.back-to-top:hover{color:var(--primary);}

/* ---------- misc ---------- */
.mobile-bar{display:none;}
.toast{
  position:fixed;left:50%;bottom:36px;transform:translate(-50%,20px);
  background:rgba(17,30,51,.96);border:1px solid var(--line-strong);color:var(--text);
  padding:11px 20px;border-radius:var(--radius-pill);font-size:13.5px;
  box-shadow:var(--shadow-hover);opacity:0;pointer-events:none;
  transition:opacity .26s var(--ease),transform .26s var(--ease);z-index:120;
}
.toast.is-show{opacity:1;transform:translate(-50%,0);}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 272px;gap:36px;}
  .cta-wrap{padding:40px;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .band{padding:72px 0;}
  .band--tight{padding:56px 0;}
  .nav{display:none;}
  .nav-toggle{display:block;}
  .header-actions .status-chip{display:none;}
  .is-nav-open .nav{
    display:flex;flex-direction:column;align-items:stretch;gap:6px;
    position:fixed;top:0;right:0;height:100vh;width:min(320px,86vw);
    padding:92px 22px 28px;margin:0;z-index:70;
    background:linear-gradient(180deg,rgba(12,22,38,.99),rgba(7,14,24,.99));
    border-left:1px solid var(--line);box-shadow:-18px 0 40px rgba(0,0,0,.5);
    animation:drawerIn .28s var(--ease) both;
  }
  @keyframes drawerIn{from{transform:translateX(24px);opacity:.4;}to{transform:translateX(0);opacity:1;}}
  .is-nav-open .nav-link{padding:14px 12px;font-size:15.5px;border-bottom:1px solid var(--line);}
  .is-nav-open .nav-link::after{display:none;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:40px;}
  .sidebar{position:static;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-wrap{grid-template-columns:minmax(0,1fr);gap:32px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:767px){
  body{font-size:15px;line-height:1.8;}
  .container{padding:0 16px;}
  .band{padding:56px 0;}
  .band--tight{padding:44px 0;}
  .header-inner{min-height:66px;gap:14px;}
  .article-hero{padding:36px 0 34px;}
  .article-title{max-width:none;font-size:26px;}
  .share-group{width:100%;margin-left:0;}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .post-nav{grid-template-columns:minmax(0,1fr);}
  .cta-wrap{padding:28px 20px;border-radius:18px;}
  .form-row{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-bottom{justify-content:flex-start;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .mobile-bar{
    display:flex;gap:12px;position:fixed;left:0;right:0;bottom:0;z-index:80;
    padding:10px 16px 14px;background:rgba(7,14,24,.95);
    border-top:1px solid var(--line);backdrop-filter:blur(12px);
  }
  .mobile-bar .btn{flex:1;}
  .site-footer{padding-bottom:96px;}
}
@media (max-width:479px){
  .article-body{font-size:15px;}
  .side-card{padding:18px;}
  .form-card{padding:20px;}
  .btn{padding:12px 18px;font-size:14.5px;}
  .crumbs{font-size:12.5px;}
}

/* roulang page: category2 */
:root{
  --bg:#070E18;
  --panel:#0C1626;
  --elev:#111E33;
  --line:rgba(140,190,255,.14);
  --line-strong:rgba(140,190,255,.28);
  --glass:rgba(255,255,255,.045);
  --glass-top:rgba(255,255,255,.08);
  --primary:#3D7BFF;
  --primary-soft:rgba(61,123,255,.14);
  --amber:#FFA23A;
  --amber-deep:#F08A12;
  --cyan:#27E0C8;
  --rose:#FF5C7A;
  --text:#E8F0FB;
  --text-2:#A9BCD4;
  --text-3:#7387A1;
  --r-card:16px;
  --r-btn:12px;
  --r-img:14px;
  --sh-card:0 8px 24px rgba(0,0,0,.45);
  --sh-hover:0 14px 34px rgba(0,0,0,.55);
  --sh-amber:0 10px 26px rgba(255,162,58,.28);
  --sec:96px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:#6E9CFF}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{list-style:none}
::selection{background:rgba(61,123,255,.35)}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,14,24,.78);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:height .25s ease,background .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{background:rgba(7,14,24,.94);box-shadow:0 8px 26px rgba(0,0,0,.5)}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  min-height:72px;
  padding-top:10px;padding-bottom:10px;
}
.site-header.is-scrolled .header-inner{min-height:62px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:17px;letter-spacing:.01em}
.brand:hover{color:var(--text)}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,var(--primary),#1E4FB8);
  color:#fff;font-weight:800;font-size:16px;
  box-shadow:0 6px 18px rgba(61,123,255,.35);
  flex:0 0 auto;
}
.brand small{display:block;font-size:12px;font-weight:400;color:var(--text-3);line-height:1.3;letter-spacing:.04em}
.nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 12px;border-radius:10px;
  color:var(--text-2);font-size:15px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:var(--text);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--cyan));
}
.header-actions{display:flex;align-items:center;gap:12px}
.status-chip{white-space:nowrap}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);background:var(--glass);cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--text);position:relative;border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--text);border-radius:2px;
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* ---------- badges / buttons ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:13px;line-height:1.5;
  border:1px solid var(--line);background:var(--glass);color:var(--text-2);
}
.badge i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--cyan);flex:0 0 auto}
.badge--cyan{border-color:rgba(39,224,200,.32);color:#8CF3E3}
.badge--cyan i{box-shadow:0 0 8px rgba(39,224,200,.8)}
.badge--amber{border-color:rgba(255,162,58,.35);color:#FFCB8C}
.badge--amber i{background:var(--amber);box-shadow:0 0 8px rgba(255,162,58,.8)}
.badge--rose{border-color:rgba(255,92,122,.32);color:#FFA6B7}
.badge--rose i{background:var(--rose);box-shadow:0 0 8px rgba(255,92,122,.8)}
.badge--plain i{background:var(--primary)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .25s ease,background .2s ease,border-color .2s ease,opacity .2s ease;
  text-align:center;
}
.btn--sm{padding:9px 16px;font-size:14px;border-radius:10px}
.btn--lg{padding:16px 32px;font-size:16px}
.btn--amber{
  background:linear-gradient(135deg,var(--amber),var(--amber-deep));
  color:#26170A;
  box-shadow:var(--sh-amber);
}
.btn--amber:hover{color:#26170A;transform:translateY(-2px);box-shadow:0 14px 32px rgba(255,162,58,.36)}
.btn--primary{
  background:linear-gradient(135deg,var(--primary),#2450AE);
  color:#fff;box-shadow:0 10px 26px rgba(61,123,255,.3);
}
.btn--primary:hover{color:#fff;transform:translateY(-2px)}
.btn--ghost{
  background:var(--glass);border-color:var(--line-strong);color:var(--text);
}
.btn--ghost:hover{color:var(--text);border-color:rgba(140,190,255,.45);background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn--text{padding:6px 0;color:var(--primary);background:none;border:none}
.btn--text:hover{color:#7FA8FF;transform:translateX(2px)}
.btn:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid rgba(61,123,255,.75);outline-offset:2px;
}
.btn:disabled,.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  padding:96px 0 84px;
  background-image:linear-gradient(100deg,rgba(7,14,24,.96) 0%,rgba(7,14,24,.78) 52%,rgba(7,14,24,.86) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(140,190,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(140,190,255,.07) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 30% 40%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 30% 40%,#000 0%,transparent 72%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{opacity:.5}
.crumb .now{color:var(--text-2)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:end}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px}
.page-hero h1{
  font-size:44px;line-height:1.26;font-weight:800;letter-spacing:.01em;
  margin-bottom:18px;
}
.page-hero h1 em{font-style:normal;color:var(--amber)}
.hero-lead{font-size:17px;color:var(--text-2);max-width:620px;line-height:1.9}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-side{
  display:grid;gap:14px;
  padding:24px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--sh-card);
  backdrop-filter:blur(6px);
}
.hero-side h2{font-size:16px;font-weight:700;color:var(--text)}
.hero-side .stat-row{display:flex;justify-content:space-between;align-items:baseline;padding:12px 0;border-bottom:1px dashed var(--line)}
.hero-side .stat-row:last-child{border-bottom:none;padding-bottom:0}
.hero-side .stat-num{font-family:Inter,"PingFang SC",system-ui,sans-serif;font-size:26px;font-weight:700;color:var(--amber);font-variant-numeric:tabular-nums}
.hero-side .stat-label{font-size:13px;color:var(--text-3);text-align:right;max-width:56%}

/* ---------- sections ---------- */
.section{padding:var(--sec) 0}
.section--tight{padding:72px 0}
.section--panel{background:linear-gradient(180deg,rgba(12,22,38,.85),rgba(7,14,24,.2));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--cyan);letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;
}
.section-kicker::before{content:"";width:22px;height:1px;background:var(--cyan);opacity:.7}
.section-head.center .section-kicker::before{display:none}
.section-head h2{font-size:32px;line-height:1.35;font-weight:700;margin-bottom:16px}
.section-head p{color:var(--text-2);font-size:16px}

/* ---------- waterfall cards ---------- */
.waterfall{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.waterfall .col{display:grid;gap:28px}
.waterfall .col--shift{margin-top:64px}
.scene-card{
  position:relative;overflow:hidden;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.scene-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--glass-top);z-index:3;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--line-strong)}
.scene-card .thumb{position:relative;overflow:hidden;aspect-ratio:16/10;background:#0A1220}
.scene-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;border-radius:0}
.scene-card:hover .thumb img{transform:scale(1.03)}
.scene-card .thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,14,24,.05) 30%,rgba(7,14,24,.85) 100%);
}
.scene-body{padding:24px 24px 26px;position:relative}
.scene-tagline{position:absolute;top:-14px;left:24px}
.scene-body h3{font-size:21px;font-weight:700;line-height:1.4;margin:14px 0 12px}
.scene-body p{color:var(--text-2);font-size:15px;line-height:1.85}
.scene-list{margin-top:16px;display:grid;gap:8px}
.scene-list li{position:relative;padding-left:16px;font-size:14px;color:var(--text-2)}
.scene-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--primary);opacity:.85}
.scene-index{
  position:absolute;right:20px;bottom:12px;
  font-family:Inter,system-ui,sans-serif;
  font-size:52px;font-weight:800;line-height:1;
  color:rgba(140,190,255,.12);
  letter-spacing:-.02em;
  user-select:none;
}
.scene-card:nth-child(odd) .scene-index{color:rgba(255,162,58,.16)}

/* ---------- timeline ---------- */
.timeline{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  overflow:hidden;
}
.tl-step{
  position:relative;padding:32px 26px 30px;
  border-right:1px solid var(--line);
  transition:background .25s ease;
}
.tl-step:last-child{border-right:none}
.tl-step:hover{background:rgba(61,123,255,.06)}
.tl-step::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--cyan));opacity:.75;
}
.tl-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;
  background:var(--primary-soft);border:1px solid var(--line-strong);
  color:#9FC0FF;font-family:Inter,system-ui,sans-serif;font-weight:700;font-size:14px;
  margin-bottom:16px;
}
.tl-step h3{font-size:18px;font-weight:700;margin-bottom:10px}
.tl-step p{font-size:14px;color:var(--text-2);line-height:1.8}
.tl-meta{margin-top:14px;font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums}

/* ---------- metrics band ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
}
.metric{
  padding:26px 24px;border-radius:var(--r-card);
  background:linear-gradient(160deg,rgba(17,30,51,.9),rgba(12,22,38,.6));
  border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease;
}
.metric:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.metric .num{
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:34px;font-weight:800;color:var(--amber);line-height:1.1;
}
.metric .num small{font-size:16px;color:var(--text-2);font-weight:600;margin-left:4px}
.metric h3{font-size:16px;font-weight:600;margin:12px 0 6px}
.metric p{font-size:14px;color:var(--text-3);line-height:1.75}

/* ---------- proof ---------- */
.proof-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.proof-card{
  padding:28px 26px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--sh-card);
  display:flex;flex-direction:column;gap:18px;
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.proof-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-hover)}
.proof-card blockquote{font-size:15px;color:var(--text);line-height:1.9}
.proof-card blockquote::before{content:"“";color:var(--amber);font-size:26px;line-height:0;margin-right:2px}
.proof-who{display:flex;align-items:center;gap:12px;margin-top:auto}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(140deg,rgba(61,123,255,.5),rgba(39,224,200,.35));
  border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:#DCE9FF;
}
.proof-who b{display:block;font-size:14px;font-weight:600;color:var(--text)}
.proof-who span{display:block;font-size:13px;color:var(--text-3)}
.stars{color:var(--amber);font-size:13px;letter-spacing:2px}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto;display:grid;gap:14px}
.faq-item{
  border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  overflow:hidden;transition:border-color .25s ease,background .25s ease;
}
.faq-item[open]{border-color:var(--line-strong);background:rgba(255,255,255,.06)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;gap:14px;
  padding:20px 22px 20px 20px;
  font-size:16px;font-weight:600;color:var(--text);
  border-left:3px solid var(--primary);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{
  margin-left:auto;flex:0 0 auto;
  width:22px;height:22px;position:relative;
  transition:transform .22s ease;
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--text-2);border-radius:2px;
  transition:background .2s ease;
}
.faq-item summary .plus::before{left:0;top:10px;width:22px;height:2px}
.faq-item summary .plus::after{top:0;left:10px;width:2px;height:22px}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-item[open] summary .plus::before,
.faq-item[open] summary .plus::after{background:var(--amber)}
.faq-answer{padding:0 22px 22px 37px;color:var(--text-2);font-size:15px;line-height:1.9}

/* ---------- cta ---------- */
.cta-band{
  position:relative;
  border-radius:22px;overflow:hidden;
  border:1px solid var(--line-strong);
  background-image:linear-gradient(115deg,rgba(9,17,30,.97),rgba(12,26,48,.86)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  padding:56px 52px;
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;
  box-shadow:var(--sh-card);
}
.cta-band h2{font-size:30px;font-weight:700;line-height:1.4;margin-bottom:16px}
.cta-band p{color:var(--text-2);font-size:15px;line-height:1.9}
.cta-points{margin-top:24px;display:grid;gap:10px}
.cta-points li{position:relative;padding-left:20px;font-size:14px;color:var(--text-2)}
.cta-points li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  border:2px solid var(--cyan);opacity:.85;
}
.form-card{
  background:rgba(9,17,30,.72);
  border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;
  backdrop-filter:blur(8px);
}
.form-row{display:grid;gap:8px;margin-bottom:16px}
.form-row label{font-size:13px;color:var(--text-2)}
.form-row input,.form-row select,.form-row textarea{
  width:100%;padding:12px 14px;border-radius:var(--r-btn);
  background:rgba(7,14,24,.75);
  border:1px solid var(--line);
  color:var(--text);font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.form-row input::placeholder,.form-row textarea::placeholder{color:#5B6E86}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(61,123,255,.18);
  background:rgba(7,14,24,.95);
}
.form-row textarea{resize:vertical;min-height:88px}
.form-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-note{font-size:13px;color:var(--text-3);margin-top:12px}
.form-status{margin-top:14px;font-size:14px;min-height:22px}
.form-status.ok{color:var(--cyan)}
.form-status.err{color:var(--rose)}
.form-card .btn{width:100%}

/* ---------- footer ---------- */
.site-footer{
  margin-top:var(--sec);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(12,22,38,.7),rgba(7,14,24,.95));
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand{font-size:16px;margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-3);line-height:1.85;max-width:340px}
.footer-col h3{font-size:15px;font-weight:600;color:var(--text);margin-bottom:18px}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:14px;color:var(--text-2);display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact li{font-size:14px;color:var(--text-3)}
.footer-contact b{color:var(--text-2);font-weight:600}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.back-to-top{font-size:13px;color:var(--text-3)}
.back-to-top:hover{color:var(--primary)}

/* ---------- mobile sticky bar ---------- */
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  padding:10px 16px;gap:12px;
  background:rgba(7,14,24,.94);
  border-top:1px solid var(--line);
  backdrop-filter:blur(12px);
}
.mobile-bar .btn{flex:1}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .page-hero h1{font-size:40px}
  .hero-grid{gap:36px}
}
@media (max-width:1023px){
  :root{--sec:72px}
  .nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions .status-chip{display:none}
  .nav.is-open{
    display:flex;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    padding:14px 24px 20px;
    background:rgba(7,14,24,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 20px 40px rgba(0,0,0,.55);
  }
  .hero-grid{grid-template-columns:1fr;gap:32px;align-items:start}
  .page-hero{padding:76px 0 64px}
  .page-hero h1{font-size:36px}
  .timeline{grid-template-columns:1fr 1fr}
  .tl-step:nth-child(2){border-right:none}
  .tl-step:nth-child(1),.tl-step:nth-child(2){border-bottom:1px solid var(--line)}
  .metrics{grid-template-columns:1fr 1fr}
  .proof-grid{grid-template-columns:1fr}
  .cta-band{grid-template-columns:1fr;padding:44px 34px;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:767px){
  :root{--sec:56px}
  body{font-size:15px}
  .container{padding:0 16px}
  .page-hero h1{font-size:29px}
  .page-hero{padding:56px 0 50px}
  .hero-lead{font-size:15px}
  .section-head h2{font-size:24px}
  .section-head{margin-bottom:32px}
  .waterfall{grid-template-columns:1fr;gap:22px}
  .waterfall .col{gap:22px}
  .waterfall .col--shift{margin-top:0}
  .timeline{grid-template-columns:1fr}
  .tl-step{border-right:none;border-bottom:1px solid var(--line)}
  .tl-step:last-child{border-bottom:none}
  .metrics{grid-template-columns:1fr}
  .form-grid-2{grid-template-columns:1fr}
  .cta-band{padding:32px 22px}
  .cta-band h2{font-size:24px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-brand p{max-width:100%}
  .mobile-bar{display:flex}
  .site-footer{margin-bottom:64px}
  .hero-cta .btn{flex:1 1 100%}
}
@media (max-width:479px){
  .page-hero h1{font-size:26px}
  .metric .num{font-size:28px}
  .scene-body{padding:20px 18px 24px}
  .scene-index{font-size:42px;right:14px;bottom:8px}
  .form-card{padding:20px}
  .brand small{display:none}
}

/* roulang page: category3 */
:root{
  --bg:#070E18;
  --panel:#0C1626;
  --raise:#111E33;
  --primary:#3D7BFF;
  --primary-soft:rgba(61,123,255,.14);
  --amber:#FFA23A;
  --cyan:#27E0C8;
  --rose:#FF5C7A;
  --text:#E8F0FF;
  --muted:#8FA3C0;
  --line:rgba(140,190,255,.14);
  --line-strong:rgba(140,190,255,.3);
  --glass:rgba(255,255,255,.045);
  --hi:rgba(255,255,255,.08);
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
  --shadow-hover:0 14px 34px rgba(0,0,0,.55);
  --container:1200px;
  --gap:24px;
  --section:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(900px 480px at 78% -8%,rgba(61,123,255,.16),transparent 60%),
    radial-gradient(700px 420px at 6% 22%,rgba(39,224,200,.08),transparent 62%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s,transform .2s;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{line-height:1.3;letter-spacing:.01em;font-weight:700;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;position:relative;z-index:1;}
.section{padding:var(--section) 0;position:relative;z-index:1;}
.section--tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:32px;margin-bottom:14px;}
.section-head p{color:var(--muted);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--primary);margin-bottom:14px;font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--primary);display:block;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,14,24,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .25s,border-color .25s,box-shadow .25s;
}
.site-header.is-scrolled{
  background:rgba(7,14,24,.95);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(0,0,0,.45);
}
.header-inner{display:flex;align-items:center;gap:26px;height:78px;transition:height .25s;}
.site-header.is-scrolled .header-inner{height:66px;}
.brand{display:inline-flex;align-items:center;gap:11px;font-weight:700;font-size:19px;letter-spacing:.02em;flex-shrink:0;}
.brand:hover{color:var(--text);}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.08em;line-height:1.2;margin-top:2px;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,#3D7BFF,#1b4fd0);
  color:#fff;font-weight:800;font-size:18px;
  box-shadow:0 0 0 1px rgba(255,255,255,.1),0 8px 20px rgba(61,123,255,.35);
}
.nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  position:relative;
  padding:9px 14px;border-radius:10px;
  font-size:14.5px;color:var(--muted);
  transition:color .2s,background .2s;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  background:var(--primary);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .22s;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-link.is-active{color:var(--text);}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.status-chip{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12.5px;color:var(--cyan);
  background:rgba(39,224,200,.09);
  border:1px solid rgba(39,224,200,.28);
  padding:6px 12px;border-radius:var(--r-pill);
  white-space:nowrap;
}
.status-chip i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan);}
.nav-toggle{display:none;width:42px;height:42px;border-radius:11px;border:1px solid var(--line);background:var(--glass);position:relative;}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--text);border-radius:2px;
  transform:translateX(-50%);transition:.25s;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none;}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none;}
.nav-drawer-cta{display:none;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:transform .2s,box-shadow .25s,background .25s,border-color .25s,color .2s,opacity .2s;
  white-space:nowrap;
}
.btn--sm{padding:10px 18px;font-size:14px;}
.btn--lg{padding:16px 30px;font-size:16px;}
.btn--amber{
  background:linear-gradient(135deg,#FFB55C,#FF8A16);
  color:#20130A;
  box-shadow:0 0 22px rgba(255,162,58,.3),0 8px 20px rgba(0,0,0,.35);
}
.btn--amber:hover{transform:translateY(-2px);box-shadow:0 0 28px rgba(255,162,58,.38),0 14px 28px rgba(0,0,0,.45);}
.btn--amber:active{transform:translateY(0);}
.btn--ghost{
  background:var(--glass);
  border-color:var(--line-strong);
  color:var(--text);
  backdrop-filter:blur(6px);
}
.btn--ghost:hover{border-color:var(--primary);color:#fff;transform:translateY(-2px);background:rgba(61,123,255,.12);}
.btn--line{border-color:rgba(61,123,255,.5);color:#9EC0FF;background:rgba(61,123,255,.06);}
.btn--line:hover{background:rgba(61,123,255,.16);color:#fff;transform:translateY(-2px);}
.btn--text{padding:8px 4px;color:var(--primary);}
.btn--text:hover{color:#9EC0FF;transform:translateX(2px);}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn--block{width:100%;}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;
  padding:5px 12px;border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--muted);
  line-height:1.6;
}
.badge--cyan{color:var(--cyan);border-color:rgba(39,224,200,.3);background:rgba(39,224,200,.08);}
.badge--amber{color:var(--amber);border-color:rgba(255,162,58,.32);background:rgba(255,162,58,.09);}
.badge--rose{color:var(--rose);border-color:rgba(255,92,122,.32);background:rgba(255,92,122,.09);}
.badge--blue{color:#9EC0FF;border-color:rgba(61,123,255,.34);background:rgba(61,123,255,.1);}

/* ---------- hero ---------- */
.hero{padding:64px 0 56px;position:relative;overflow:hidden;}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(140,190,255,.28),transparent);
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;}
.hero h1{font-size:44px;margin:16px 0 18px;}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero-sub{color:var(--muted);font-size:17px;max-width:600px;margin-bottom:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px;}
.hero-visual{
  position:relative;border-radius:20px;overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  min-height:320px;
}
.hero-visual img{width:100%;height:100%;object-fit:cover;min-height:320px;}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,14,24,.15),rgba(7,14,24,.78));
}
.hero-visual .visual-label{
  position:absolute;left:20px;bottom:20px;right:20px;
  z-index:2;
}
.hero-visual .visual-label strong{display:block;font-size:17px;margin-bottom:4px;}
.hero-visual .visual-label span{font-size:13.5px;color:var(--muted);}

/* ---------- search + filter ---------- */
.search-panel{
  display:flex;gap:12px;align-items:center;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:18px;
  padding:12px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(8px);
}
.search-panel .field{flex:1;position:relative;}
.search-panel input{
  width:100%;
  background:rgba(7,14,24,.65);
  border:1px solid var(--line);
  border-radius:12px;
  padding:14px 16px;
  font-size:15px;
  transition:border-color .2s,box-shadow .2s;
}
.search-panel input::placeholder{color:#61748f;}
.search-panel input:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(61,123,255,.18);
}
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.chip{
  font-size:13.5px;padding:8px 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--muted);
  transition:.2s;
}
.chip:hover{color:var(--text);border-color:var(--line-strong);}
.chip.is-on{background:rgba(61,123,255,.16);border-color:rgba(61,123,255,.5);color:#BFD6FF;}

/* ---------- stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);
  margin-top:44px;
}
.stat{
  background:var(--glass);
  border:1px solid var(--line);
  border-top:1px solid var(--hi);
  border-radius:var(--r-card);
  padding:22px 22px 20px;
}
.stat b{
  display:block;font-size:32px;line-height:1.2;
  font-family:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  color:#fff;letter-spacing:.01em;
}
.stat b i{font-style:normal;font-size:16px;color:var(--amber);margin-left:4px;}
.stat span{display:block;font-size:13.5px;color:var(--muted);margin-top:6px;}

/* ---------- table ---------- */
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--panel);
  overflow:hidden;
}
.table-scroll{overflow-x:auto;}
.svc-table{min-width:900px;font-size:14.5px;}
.svc-table th{
  text-align:left;
  padding:16px 20px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--muted);
  background:rgba(255,255,255,.045);
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.svc-table td{
  padding:18px 20px;
  border-bottom:1px solid rgba(140,190,255,.1);
  vertical-align:middle;
  color:#C8D8F0;
}
.svc-table tr:last-child td{border-bottom:0;}
.svc-table tr:hover td{background:rgba(61,123,255,.05);}
.svc-table .svc-name{color:#fff;font-weight:600;font-size:15px;display:block;margin-bottom:3px;}
.svc-table .svc-desc{font-size:13px;color:var(--muted);}
.svc-table .num{font-family:"Inter",ui-monospace,monospace;color:var(--amber);}
.table-foot{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  padding:16px 20px;background:rgba(255,255,255,.028);
  border-top:1px solid var(--line);
  font-size:13.5px;color:var(--muted);
}

/* ---------- resource cards ---------- */
.res-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.res-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-top:1px solid var(--hi);
  border-radius:var(--r-card);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .28s,box-shadow .28s,border-color .28s;
}
.res-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(140,190,255,.3);}
.res-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--raise);position:relative;}
.res-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s;}
.res-card:hover .thumb img{transform:scale(1.03);}
.res-card .thumb .badge{position:absolute;left:14px;top:14px;}
.res-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.res-body h3{font-size:18px;}
.res-body p{font-size:14px;color:var(--muted);}
.res-body .meta{display:flex;gap:14px;font-size:12.5px;color:#6F86A6;margin-top:auto;}
.res-actions{display:flex;gap:10px;padding:0 22px 22px;}

/* ---------- tiers ---------- */
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);align-items:stretch;}
.tier-card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 26px;
  display:flex;flex-direction:column;gap:16px;
  transition:transform .28s,border-color .28s,box-shadow .28s;
}
.tier-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.tier-card.is-key{
  border-color:rgba(255,162,58,.4);
  background:linear-gradient(180deg,rgba(255,162,58,.08),rgba(12,22,38,.9) 42%);
}
.tier-card .tier-no{
  font-family:"Inter",ui-monospace,monospace;
  font-size:12.5px;letter-spacing:.14em;color:var(--muted);
}
.tier-card h3{font-size:20px;}
.tier-card .tier-resp{
  font-size:24px;font-weight:700;color:var(--amber);
  font-family:"Inter",ui-monospace,monospace;
}
.tier-card .tier-resp small{display:block;font-size:13px;color:var(--muted);font-weight:400;font-family:inherit;margin-top:2px;}
.tier-list{display:flex;flex-direction:column;gap:10px;font-size:14px;color:#C3D3EB;}
.tier-list li{position:relative;padding-left:18px;}
.tier-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:6px;height:6px;border-radius:2px;background:var(--primary);
}
.tier-card .btn{margin-top:auto;}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-left:3px solid rgba(61,123,255,.55);
  border-radius:14px;
  overflow:hidden;
  transition:border-color .25s,background .25s;
}
.faq-item[open]{border-color:rgba(140,190,255,.3);border-left-color:var(--primary);background:rgba(255,255,255,.055);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:18px 22px;
  font-size:16px;font-weight:600;
  display:flex;align-items:center;gap:16px;
  transition:color .2s;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:#BFD6FF;}
.faq-item summary .plus{
  margin-left:auto;flex:0 0 22px;width:22px;height:22px;position:relative;
  transition:transform .22s;
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
}
.faq-item summary .plus::before{left:0;right:0;top:10px;height:2px;}
.faq-item summary .plus::after{top:0;bottom:0;left:10px;width:2px;}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-item .faq-body{
  padding:0 22px 20px 22px;
  font-size:14.5px;color:var(--muted);
  line-height:1.85;
  animation:fadeUp .22s ease;
}
@keyframes fadeUp{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ---------- CTA ---------- */
.cta-band{
  background:
    linear-gradient(180deg,rgba(17,30,51,.92),rgba(12,22,38,.92)),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  border:1px solid var(--line);
  border-radius:22px;
  padding:48px;
  display:grid;grid-template-columns:1fr 1fr;gap:48px;
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:30px;margin-bottom:14px;}
.cta-band p{color:var(--muted);font-size:15.5px;margin-bottom:22px;}
.cta-points{display:flex;flex-direction:column;gap:12px;font-size:14.5px;color:#C3D3EB;}
.cta-points li{position:relative;padding-left:20px;}
.cta-points li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 10px rgba(39,224,200,.7);
}
.form-card{
  background:rgba(7,14,24,.62);
  border:1px solid var(--line);
  border-radius:18px;
  padding:26px;
  backdrop-filter:blur(8px);
}
.form-row{display:flex;flex-direction:column;gap:7px;margin-bottom:15px;}
.form-row label{font-size:13.5px;color:var(--muted);}
.form-row input,.form-row select,.form-row textarea{
  background:rgba(7,14,24,.85);
  border:1px solid var(--line);
  border-radius:12px;
  padding:13px 15px;
  font-size:14.5px;
  color:var(--text);
  transition:border-color .2s,box-shadow .2s;
  width:100%;
}
.form-row textarea{min-height:92px;resize:vertical;}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(61,123,255,.18);
}
.form-row.has-error input,.form-row.has-error select{
  border-color:var(--rose);box-shadow:0 0 0 3px rgba(255,92,122,.14);
}
.form-hint{font-size:12.5px;color:var(--muted);margin-top:10px;}
.form-status{
  margin-top:14px;font-size:13.5px;padding:11px 14px;border-radius:11px;display:none;
}
.form-status.is-ok{display:block;background:rgba(39,224,200,.1);border:1px solid rgba(39,224,200,.3);color:var(--cyan);}
.form-status.is-err{display:block;background:rgba(255,92,122,.1);border:1px solid rgba(255,92,122,.32);color:var(--rose);}

/* ---------- breadcrumb ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--muted);
  padding:22px 0 0;
}
.crumb a:hover{color:var(--primary);}
.crumb span.sep{color:#4A5C74;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:96px;
  background:linear-gradient(180deg,rgba(12,22,38,.4),rgba(7,14,24,.95));
  border-top:1px solid var(--line);
  padding-top:64px;
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:16px;max-width:340px;line-height:1.85;}
.footer-brand .brand{font-size:17px;}
.footer-col h3{font-size:15px;margin-bottom:16px;color:#fff;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:var(--muted);display:inline-block;transition:color .2s,transform .2s;}
.footer-col a:hover{color:var(--primary);transform:translateX(2px);}
.footer-contact li{font-size:14px;color:var(--muted);}
.footer-contact b{color:#C8D8F0;font-weight:600;}
.footer-bottom{
  margin-top:52px;padding:22px 0;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:#6F86A6;
}
.back-to-top{color:var(--muted);}
.back-to-top:hover{color:var(--primary);}

/* ---------- mobile sticky bar ---------- */
.mobile-bar{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:rgba(9,17,29,.96);
  border-top:1px solid var(--line);
  backdrop-filter:blur(12px);
  padding:10px 14px;
  gap:10px;
}
.mobile-bar .btn{flex:1;padding:13px 10px;font-size:14.5px;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .hero h1{font-size:38px;}
  .container{padding:0 26px;}
}
@media (max-width:1023px){
  :root{--section:72px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual{min-height:260px;}
  .hero-visual img{min-height:260px;}
  .res-grid,.tier-grid{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:repeat(2,1fr);}
  .cta-band{grid-template-columns:1fr;gap:32px;padding:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .nav{
    position:fixed;top:0;right:0;height:100vh;width:min(330px,86vw);
    background:rgba(9,17,29,.985);
    border-left:1px solid var(--line);
    flex-direction:column;align-items:stretch;
    padding:96px 24px 32px;gap:6px;
    transform:translateX(100%);
    transition:transform .3s ease;
    z-index:95;margin-left:0;
    overflow-y:auto;
  }
  .nav.is-open{transform:translateX(0);}
  .nav-link{padding:14px 12px;font-size:16px;border-radius:12px;}
  .nav-link::after{display:none;}
  .nav-link.is-active{background:rgba(61,123,255,.14);color:#fff;}
  .nav-drawer-cta{display:block;margin-top:22px;}
  .nav-toggle{display:block;z-index:96;}
  .header-actions .status-chip{display:none;}
  .header-actions .btn--amber{display:none;}
}
@media (max-width:767px){
  :root{--section:56px;--gap:16px;}
  body{font-size:15px;}
  .container{padding:0 16px;}
  .hero{padding:36px 0 40px;}
  .hero h1{font-size:28px;}
  .hero-sub{font-size:15.5px;}
  .section-head h2{font-size:24px;}
  .search-panel{flex-direction:column;align-items:stretch;}
  .res-grid,.tier-grid{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr 1fr;gap:12px;}
  .stat{padding:18px 16px;}
  .stat b{font-size:24px;}
  .cta-band{padding:26px 20px;border-radius:18px;}
  .cta-band h2{font-size:23px;}
  .form-card{padding:20px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .mobile-bar{display:flex;}
  body{padding-bottom:72px;}
  .faq-item summary{padding:16px 16px;font-size:15px;}
  .faq-item .faq-body{padding:0 16px 18px;}
  .table-foot{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .hero h1{font-size:25px;}
  .brand small{display:none;}
  .stats{grid-template-columns:1fr;}
  .res-body{padding:18px 16px;}
  .res-actions{padding:0 16px 18px;flex-direction:column;}
  .res-actions .btn{width:100%;}
  .tier-card{padding:22px 18px;}
}