/* roulang page: index */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#111A2B;
  --line:rgba(126,166,210,.14);
  --brand:#1FD1B2;
  --brand-soft:rgba(31,209,178,.12);
  --accent:#F5A524;
  --text-1:#E8EEF7;
  --text-2:#A7B4C8;
  --text-3:#6E7E96;
  --danger:#FF6B6B;
  --ok:#3DD68C;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:22px;
  --shadow-1:0 8px 24px rgba(0,0,0,.35);
  --shadow-2:0 18px 40px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --glow:0 0 0 1px rgba(31,209,178,.5), 0 8px 24px rgba(31,209,178,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --maxw:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{background:var(--bg-0);scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    radial-gradient(720px 420px at 86% -6%, rgba(31,209,178,.08), transparent 68%),
    linear-gradient(rgba(126,166,210,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126,166,210,.05) 1px, transparent 1px);
  background-size:auto, 40px 40px, 40px 40px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.06em;color:var(--brand);
  background:var(--brand-soft);border-radius:var(--r-sm);
  height:26px;padding:0 10px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:44px;flex-wrap:wrap;}
.section-head h2{font-size:28px;line-height:1.35;position:relative;padding-left:16px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
  border-radius:2px;background:var(--brand);
}
.section-head p{font-size:14px;color:var(--text-3);margin-top:10px;padding-left:16px;}
.more-link{font-size:14px;color:var(--brand);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.more-link span{transition:transform .18s var(--ease);}
.more-link:hover span{transform:translateX(3px);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:all .18s var(--ease);white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#04211C;box-shadow:var(--glow);}
.btn--primary:hover{color:#04211C;transform:translateY(-2px);box-shadow:0 12px 34px rgba(31,209,178,.42);}
.btn--primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(31,209,178,.5),0 4px 14px rgba(31,209,178,.24);}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text-1);}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn--text{background:none;border:0;color:var(--brand);height:auto;padding:0;font-weight:600;}
.btn--text span{transition:transform .18s var(--ease);}
.btn--text:hover span{transform:translateX(3px);}
.btn--sm{height:38px;padding:0 16px;font-size:14px;}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-sm);background:var(--brand-soft);color:var(--brand);
  font-size:12px;line-height:1;white-space:nowrap;
}
.badge--accent{background:rgba(245,165,36,.14);color:var(--accent);}
/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(6,10,18,.82);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-compact{box-shadow:0 10px 30px rgba(0,0,0,.45);}
.header-main__inner{display:flex;align-items:center;gap:20px;height:66px;transition:height .2s var(--ease);}
.is-compact .header-main__inner{height:54px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{width:24px;height:24px;flex-shrink:0;}
.brand__text{display:flex;flex-direction:column;line-height:1.2;}
.brand__name{font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:.01em;}
.brand__sub{font-size:10px;color:var(--text-3);letter-spacing:.16em;margin-top:2px;}
.nav{display:flex;align-items:center;gap:2px;margin-left:12px;}
.nav__link{
  position:relative;display:inline-flex;align-items:center;height:38px;
  padding:0 14px;font-size:15px;color:var(--text-2);border-radius:var(--r-sm);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav__link:hover{color:var(--text-1);background:rgba(126,166,210,.06);}
.nav__link.is-active{color:var(--brand);}
.nav__link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--brand);box-shadow:0 0 10px rgba(31,209,178,.7);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-md);background:transparent;
  color:var(--text-2);cursor:pointer;transition:all .18s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:rgba(31,209,178,.45);}
.header-link{font-size:14px;color:var(--text-2);}
.header-link:hover{color:var(--brand);}
.search-bar{
  display:none;border-top:1px solid var(--line);background:rgba(6,10,18,.95);
  padding:14px 0;
}
.search-bar.is-open{display:block;}
.search-bar form{display:flex;gap:12px;}
.search-bar input{
  flex:1;height:44px;padding:0 16px;border-radius:var(--r-md);
  background:rgba(8,14,24,.7);border:1px solid var(--line);
  color:var(--text-1);font-size:15px;
}
.search-bar input::placeholder{color:var(--text-3);}
.search-bar input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,209,178,.12);}
.header-trend{
  max-height:34px;overflow:hidden;
  border-top:1px solid var(--line);
  transition:max-height .2s var(--ease),opacity .2s var(--ease);
}
.is-compact .header-trend{max-height:0;opacity:0;border-top-color:transparent;}
.trend__inner{display:flex;align-items:center;gap:18px;height:33px;overflow-x:auto;scrollbar-width:none;}
.trend__inner::-webkit-scrollbar{display:none;}
.trend__label{font-size:12px;color:var(--text-3);flex-shrink:0;display:inline-flex;align-items:center;gap:6px;}
.trend__label::before{content:"";width:6px;height:6px;border-radius:1px;background:var(--accent);}
.trend__item{
  font-size:12px;color:var(--text-2);white-space:nowrap;position:relative;padding-left:0;
  display:inline-flex;align-items:center;gap:6px;
}
.trend__item::before{content:"";width:5px;height:5px;border-radius:1px;background:var(--accent);opacity:.75;}
.trend__item:hover{color:var(--brand);}
.burger{display:none;}
/* ---------- Mobile drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:150;
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.mobile-drawer{
  position:fixed;top:0;right:0;height:100%;width:min(320px,84vw);z-index:200;
  background:var(--bg-1);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .24s var(--ease);
  padding:20px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-head strong{font-size:15px;color:var(--text-1);}
.drawer-nav a{
  display:flex;align-items:center;height:44px;font-size:15px;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand);}
.drawer-trend{margin-top:20px;}
.drawer-trend p{font-size:12px;color:var(--text-3);margin-bottom:8px;}
.drawer-trend a{display:block;font-size:13px;color:var(--text-2);padding:8px 0;border-bottom:1px dashed rgba(126,166,210,.1);}
/* ---------- Hero ---------- */
.hero{padding:clamp(44px,5vw,80px) 0 clamp(40px,4vw,56px);}
.hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;}
.hero h1{
  font-size:clamp(30px,4vw,46px);line-height:1.25;margin:18px 0 16px;
  letter-spacing:-.01em;
}
.hero__lead{font-size:18px;color:var(--text-1);max-width:560px;}
.hero__note{font-size:15px;color:var(--text-2);max-width:540px;margin-top:10px;}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0 22px;}
.hero__trust{display:flex;gap:10px;flex-wrap:wrap;align-items:center;}
.hero__media{
  position:relative;border-radius:var(--r-xl);overflow:hidden;
  aspect-ratio:16/10;border:1px solid var(--line);
  background-color:var(--bg-2);
  background-image:linear-gradient(rgba(126,166,210,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(126,166,210,.08) 1px,transparent 1px);
  background-size:32px 32px,32px 32px;
  box-shadow:var(--shadow-2);
}
.hero__media img{width:100%;height:100%;object-fit:cover;}
.hero__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(6,10,18,.86),rgba(6,10,18,.18) 62%,rgba(6,10,18,.05));
}
.hero__media-card{
  position:absolute;left:20px;bottom:20px;z-index:2;
  display:flex;flex-direction:column;gap:2px;
  padding:14px 18px;border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(255,255,255,.08),rgba(255,255,255,.02));
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
}
.hero__media-card span{font-size:12px;color:var(--text-3);}
.hero__media-card strong{font-size:15px;color:var(--text-1);}
.hero__stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  margin-top:56px;padding-top:28px;border-top:1px solid var(--line);
}
.stat__num{
  font-size:28px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;line-height:1.3;
}
.stat__num small{font-size:13px;color:var(--text-3);font-weight:400;margin-left:4px;}
.stat p{font-size:13px;color:var(--text-3);}
/* ---------- Split features ---------- */
.split{display:grid;grid-template-columns:7fr 5fr;gap:24px;}
.card{
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:var(--bg-1);padding:24px;
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,.4);box-shadow:var(--shadow-2);}
.feature-lg{overflow:hidden;padding:0;display:flex;flex-direction:column;}
.feature-lg__media{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2);}
.feature-lg__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.feature-lg:hover .feature-lg__media img{transform:scale(1.03);}
.feature-lg__body{padding:26px 26px 28px;}
.feature-lg h3{font-size:20px;margin-bottom:10px;}
.feature-lg p{font-size:15px;color:var(--text-2);}
.point-list{margin-top:18px;display:grid;gap:10px;}
.point-list li{
  position:relative;padding-left:18px;font-size:14px;color:var(--text-2);
}
.point-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  border-radius:50%;background:var(--brand);
}
.feature-col{display:grid;gap:24px;align-content:start;}
.feature-card h3{font-size:18px;margin:14px 0 10px;}
.feature-card p{font-size:14px;color:var(--text-2);}
.feature-card .icon{color:var(--brand);}
/* ---------- Stats band ---------- */
.stats-band{
  background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:64px 0;
}
.stats-band__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stats-band__item{padding-left:20px;border-left:1px solid var(--line);}
.stats-band__num{
  font-size:40px;font-weight:700;color:var(--accent);line-height:1.15;
  font-variant-numeric:tabular-nums;
}
.stats-band__num small{font-size:14px;color:var(--text-2);font-weight:400;margin-left:6px;}
.stats-band__item p{font-size:13px;color:var(--text-3);margin-top:6px;}
/* ---------- Rail ---------- */
.rail{
  display:grid;grid-auto-flow:column;grid-auto-columns:300px;gap:20px;
  overflow-x:auto;padding:4px 4px 18px;scroll-snap-type:x mandatory;
  scrollbar-width:thin;scrollbar-color:rgba(31,209,178,.4) transparent;
}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:rgba(31,209,178,.35);border-radius:3px;}
.scene-card{
  scroll-snap-align:start;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-1);
  transition:transform .18s var(--ease),border-color .18s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,.4);}
.scene-card__media{position:relative;aspect-ratio:4/3;background:var(--bg-2);}
.scene-card__media img{width:100%;height:100%;object-fit:cover;}
.scene-card__badge{position:absolute;left:12px;bottom:12px;}
.scene-card__body{padding:18px 20px 20px;}
.scene-card h3{font-size:16px;margin-bottom:6px;}
.scene-card p{font-size:13px;color:var(--text-3);}
.rail-note{font-size:14px;color:var(--text-3);margin-top:8px;}
/* ---------- Steps ---------- */
.steps-wrap{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start;}
.steps-aside{position:sticky;top:110px;}
.steps-aside h2{font-size:28px;line-height:1.35;position:relative;padding-left:16px;}
.steps-aside h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand);}
.steps-aside p{font-size:14px;color:var(--text-3);margin-top:12px;padding-left:16px;}
.steps{position:relative;padding-left:6px;}
.steps::before{
  content:"";position:absolute;left:11px;top:10px;bottom:10px;width:1px;background:var(--line);
}
.step{position:relative;padding:0 0 34px 40px;}
.step:last-child{padding-bottom:0;}
.step__dot{
  position:absolute;left:5px;top:8px;width:12px;height:12px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px rgba(31,209,178,.12),0 0 14px rgba(31,209,178,.6);
}
.step h3{font-size:16px;margin-bottom:6px;}
.step p{font-size:14px;color:var(--text-2);}
.step__index{font-size:12px;color:var(--accent);letter-spacing:.12em;font-variant-numeric:tabular-nums;}
/* ---------- CMS list ---------- */
.cms-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.news-card{
  position:relative;display:grid;grid-template-columns:1fr 200px;gap:20px;
  padding:20px;border-radius:var(--r-lg);border:1px solid var(--line);
  background:var(--bg-1);overflow:hidden;
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.news-card::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  border-radius:2px;background:var(--brand);opacity:0;transition:opacity .18s var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,.4);box-shadow:var(--shadow-2);}
.news-card:hover::before{opacity:1;}
.news-card__main{display:flex;flex-direction:column;min-width:0;}
.news-card__title{
  font-size:16px;line-height:1.55;color:var(--text-1);font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin:10px 0 8px;
}
.news-card__title:hover{color:var(--brand);}
.news-card__desc{
  font-size:14px;color:var(--text-3);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{
  display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:14px;
  font-size:13px;color:var(--text-3);
}
.news-card__meta .dot{width:1px;height:12px;background:var(--line);}
.news-card__cover{
  display:block;border-radius:var(--r-md);overflow:hidden;background:var(--bg-2);
  aspect-ratio:16/9;
}
.news-card__cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.news-card:hover .news-card__cover img{transform:scale(1.04);}
.cms-empty{
  grid-column:1 / -1;
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  border:1px dashed rgba(126,166,210,.22);border-radius:var(--r-lg);background:var(--bg-1);
  color:var(--text-3);font-size:14px;text-align:center;padding:32px;
}
.cms-empty svg{color:var(--text-3);}
/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  position:relative;list-style:none;cursor:pointer;
  padding:18px 44px 18px 16px;font-size:16px;color:var(--text-1);
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:10px;top:50%;transform:translateY(-50%);
  font-size:20px;color:var(--brand);line-height:1;transition:transform .18s var(--ease);
}
.faq-item summary:hover{color:var(--brand);}
.faq-item[open] summary{color:var(--text-1);}
.faq-item[open] summary::before{
  content:"";position:absolute;left:0;top:22px;width:3px;height:20px;
  border-radius:2px;background:var(--brand);
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg);}
.faq-body{padding:0 44px 20px 16px;font-size:15px;line-height:1.9;color:var(--text-2);}
/* ---------- Contact ---------- */
.contact-band{
  background:
    radial-gradient(600px 320px at 12% 0%, rgba(31,209,178,.08), transparent 70%),
    var(--bg-1);
  border-top:1px solid var(--line);
}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.contact-grid h2{font-size:28px;line-height:1.35;position:relative;padding-left:16px;}
.contact-grid h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand);}
.contact-lead{font-size:15px;color:var(--text-2);margin:16px 0 24px;padding-left:16px;}
.contact-list{display:grid;gap:14px;padding-left:16px;}
.contact-list li{display:flex;gap:12px;font-size:14px;color:var(--text-2);}
.contact-list strong{color:var(--text-1);font-weight:600;min-width:64px;}
.form-card{
  padding:28px;border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:6px;}
.field label .req{color:var(--brand);margin-right:3px;}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 14px;border-radius:var(--r-md);
  background:rgba(8,14,24,.7);border:1px solid var(--line);
  color:var(--text-1);font-size:15px;font-family:inherit;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:110px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,209,178,.12);
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-3) 50%),linear-gradient(135deg,var(--text-3) 50%,transparent 50%);background-position:calc(100% - 20px) 19px,calc(100% - 14px) 19px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;}
.form-tip{font-size:12px;color:var(--text-3);margin-top:12px;min-height:18px;}
.form-tip.is-error{color:var(--danger);}
.form-tip.is-ok{color:var(--ok);}
.form-submit{width:100%;margin-top:6px;}
/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-1);padding-top:56px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.footer-brand .brand__name{font-size:16px;}
.footer-desc{font-size:13px;color:var(--text-3);line-height:1.9;max-width:320px;}
.footer-mail{display:inline-block;font-size:13px;color:var(--text-2);margin-top:12px;border-bottom:1px dashed rgba(126,166,210,.24);padding-bottom:2px;}
.footer-col h3{font-size:14px;color:var(--text-1);margin-bottom:14px;font-weight:600;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:13px;color:var(--text-3);}
.footer-col a:hover{color:var(--brand);}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
.footer-tags a{
  font-size:12px;color:var(--text-3);padding:5px 10px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:rgba(126,166,210,.04);
}
.footer-tags a:hover{color:var(--brand);border-color:rgba(31,209,178,.4);}
.footer-bottom{
  margin-top:44px;border-top:1px solid var(--line);padding:20px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a:hover{color:var(--brand);}
/* ---------- Responsive ---------- */
@media (max-width:1200px){
  .hero__grid{gap:40px;}
  .cms-list{grid-template-columns:repeat(2,1fr);}
  .rail{grid-auto-columns:280px;}
}
@media (max-width:992px){
  .section{padding:72px 0;}
  .nav,.header-link,.header-actions .btn--primary{display:none;}
  .burger{display:inline-flex;}
  .header-main__inner{height:60px;}
  .hero__grid{grid-template-columns:1fr;gap:32px;}
  .hero__stats{grid-template-columns:repeat(2,1fr);gap:20px;margin-top:40px;}
  .split{grid-template-columns:1fr;}
  .stats-band__grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .steps-wrap{grid-template-columns:1fr;gap:32px;}
  .steps-aside{position:static;}
  .contact-grid{grid-template-columns:1fr;gap:36px;}
  .cms-list{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:28px;}
  .section-head h2,.contact-grid h2,.steps-aside h2{font-size:24px;}
  .hero h1{font-size:clamp(26px,7vw,34px);}
  .hero__lead{font-size:16px;}
  .hero__actions .btn{flex:1 1 auto;}
  .stats-band__grid{grid-template-columns:repeat(2,1fr);}
  .stats-band__num{font-size:32px;}
  .rail{grid-auto-columns:82%;}
  .news-card{grid-template-columns:1fr;}
  .news-card__cover{order:-1;}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:480px){
  .hero__stats{grid-template-columns:1fr;}
  .stats-band__grid{grid-template-columns:1fr;}
  .stats-band__item{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:16px;}
  .footer-grid{grid-template-columns:1fr;}
  .brand__name{font-size:15px;}
  .rail{grid-auto-columns:88%;}
  .btn{width:100%;}
  .hero__actions{flex-direction:column;align-items:stretch;}
  .form-submit{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}

/* roulang page: category1 */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#111A2B;
  --line:rgba(126,166,210,0.14);
  --brand:#1FD1B2;
  --brand-soft:rgba(31,209,178,0.12);
  --accent:#F5A524;
  --text-1:#E8EEF7;
  --text-2:#A7B4C8;
  --text-3:#6E7E96;
  --danger:#FF6B6B;
  --ok:#3DD68C;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:22px;
  --shadow-1:0 8px 24px rgba(0,0,0,0.35);
  --shadow-2:0 18px 40px rgba(0,0,0,0.45),inset 0 1px 0 rgba(255,255,255,0.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --pad-section:96px;
  --max-w:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  color:var(--text-2);
  background-color:var(--bg-0);
  background-image:
    linear-gradient(rgba(126,166,210,0.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(126,166,210,0.05) 1px,transparent 1px),
    radial-gradient(720px 420px at 88% -6%,rgba(31,209,178,0.08),transparent 70%);
  background-size:40px 40px,40px 40px,100% 100%;
  background-repeat:repeat,repeat,no-repeat;
  background-attachment:scroll;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color 180ms var(--ease);}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;line-height:1.35;}
h1{font-size:clamp(30px,4vw,46px);line-height:1.25;}
h2{font-size:28px;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:16px;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:var(--r-sm);}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 24px;}
.section{padding:var(--pad-section) 0;}
.section--tight{padding:64px 0;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(6,10,18,0.82);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background 200ms var(--ease);
}
.header-main__inner{
  display:flex;align-items:center;gap:24px;
  min-height:64px;
  transition:min-height 200ms var(--ease);
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;}
.brand__text{display:flex;flex-direction:column;line-height:1.2;}
.brand__name{font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:.2px;}
.brand__sub{font-size:10px;letter-spacing:2px;color:var(--text-3);text-transform:uppercase;}
.nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav__link{
  position:relative;display:inline-flex;align-items:center;height:64px;
  padding:0 14px;font-size:15px;color:var(--text-2);white-space:nowrap;
  transition:color 180ms var(--ease),height 200ms var(--ease);
}
.nav__link:hover{color:var(--text-1);}
.nav__link.is-active{color:var(--brand);}
.nav__link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:14px;height:2px;
  background:var(--brand);border-radius:2px;
  box-shadow:0 0 10px rgba(31,209,178,0.6);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:var(--r-sm);
  border:1px solid transparent;background:transparent;color:var(--text-2);
  transition:color 180ms var(--ease),background 180ms var(--ease),border-color 180ms var(--ease);
}
.icon-btn:hover{color:var(--brand);background:var(--brand-soft);border-color:var(--line);}
.header-link{font-size:14px;color:var(--text-2);}
.burger{display:none;}
.search-bar{
  display:none;border-top:1px solid var(--line);background:rgba(8,14,24,0.92);
  padding:14px 0;
}
.search-bar.is-open{display:block;}
.search-bar form{display:flex;gap:12px;}
.search-bar input{
  flex:1;height:44px;padding:0 14px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:rgba(8,14,24,0.7);color:var(--text-1);
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.search-bar input::placeholder{color:var(--text-3);}
.search-bar input:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(31,209,178,0.12);
}
.header-trend{
  border-top:1px solid var(--line);
  overflow:hidden;
  max-height:34px;
  transition:max-height 200ms var(--ease),opacity 200ms var(--ease);
}
.trend__inner{display:flex;align-items:center;gap:18px;height:34px;overflow-x:auto;scrollbar-width:none;}
.trend__inner::-webkit-scrollbar{display:none;}
.trend__label{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;color:var(--text-3);flex-shrink:0;
}
.trend__label::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent);}
.trend__item{font-size:12px;color:var(--text-2);white-space:nowrap;flex-shrink:0;}
.trend__item:hover{color:var(--brand);}
.site-header.is-compact .header-main__inner{min-height:52px;}
.site-header.is-compact .nav__link{height:52px;}
.site-header.is-compact .header-trend{max-height:0;opacity:0;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),
             background 180ms var(--ease),border-color 180ms var(--ease),color 180ms var(--ease);
}
.btn--primary{
  background:var(--brand);color:#04120F;
  box-shadow:0 0 0 1px rgba(31,209,178,0.5),0 8px 24px rgba(31,209,178,0.28);
}
.btn--primary:hover{
  color:#04120F;transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(31,209,178,0.55),0 12px 34px rgba(31,209,178,0.42);
}
.btn--primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(31,209,178,0.45),0 4px 12px rgba(31,209,178,0.3);}
.btn--ghost{
  background:transparent;color:var(--text-1);border-color:var(--line);
  box-shadow:none;
}
.btn--ghost:hover{border-color:var(--brand);color:var(--text-1);transform:translateY(-2px);}
.btn--text{
  height:auto;padding:0;border:0;background:none;color:var(--brand);
  font-size:14px;font-weight:600;
}
.btn--text svg{transition:transform 180ms var(--ease);}
.btn--text:hover svg{transform:translateX(3px);}
.btn--sm{height:38px;padding:0 16px;font-size:14px;border-radius:var(--r-md);}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:var(--r-sm);
  font-size:12px;line-height:1;color:var(--brand);background:var(--brand-soft);
}
.badge--accent{color:var(--accent);background:rgba(245,165,36,0.12);}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding:24px 0 0;font-size:12px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:6px;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .current{color:var(--text-3);}

/* ---------- page hero ---------- */
.page-hero{padding:40px 0 72px;}
.page-hero__grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
}
.page-hero__title{margin-bottom:18px;max-width:620px;}
.page-hero__lead{font-size:17px;line-height:1.8;color:var(--text-2);max-width:580px;}
.page-hero__note{
  margin-top:14px;font-size:14px;line-height:1.85;color:var(--text-3);max-width:560px;
}
.page-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:26px;font-size:13px;color:var(--text-3);}
.hero-meta strong{color:var(--accent);font-size:15px;margin-right:6px;}
.page-hero__media{
  position:relative;border-radius:var(--r-xl);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
  box-shadow:var(--shadow-2);aspect-ratio:16/10;
}
.page-hero__media img{width:100%;height:100%;object-fit:cover;}
.page-hero__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(6,10,18,0.72) 0%,rgba(6,10,18,0.18) 55%,rgba(6,10,18,0) 100%);
}
.media-fallback{width:100%;height:100%;background:var(--bg-2);}

/* ---------- stats strip ---------- */
.stats-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-1);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:36px 0;}
.stat__num{font-size:34px;font-weight:700;color:var(--accent);line-height:1.1;font-variant-numeric:tabular-nums;}
.stat__label{font-size:13px;color:var(--text-3);margin-top:6px;}

/* ---------- section head ---------- */
.section__head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:40px;
}
.section__title{position:relative;padding-left:16px;}
.section__title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  border-radius:3px;background:var(--brand);
}
.section__desc{margin-top:10px;padding-left:16px;font-size:14px;color:var(--text-3);max-width:640px;}

/* ---------- cards ---------- */
.card{
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,0.4);box-shadow:var(--shadow-2);}
.card--glass{
  background:linear-gradient(160deg,rgba(255,255,255,0.06),rgba(255,255,255,0.02));
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border-radius:var(--r-lg);
}
.card__icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-md);
  background:var(--brand-soft);color:var(--brand);margin-bottom:16px;
}
.card__title{margin-bottom:10px;}
.card__text{font-size:14.5px;line-height:1.85;color:var(--text-2);}

.split{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch;}
.split__main{
  display:flex;flex-direction:column;overflow:hidden;padding:0;
}
.split__main-media{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2);}
.split__main-media img{width:100%;height:100%;object-fit:cover;}
.split__main-body{padding:28px;}
.split__side{display:grid;gap:24px;grid-template-rows:1fr 1fr;}

.dot-list{margin-top:18px;display:grid;gap:10px;}
.dot-list li{
  position:relative;padding-left:18px;font-size:14.5px;line-height:1.8;color:var(--text-2);
}
.dot-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--brand);
}

/* ---------- steps ---------- */
.steps-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.steps-aside{position:sticky;top:120px;}
.steps{position:relative;display:grid;gap:34px;padding-left:28px;}
.steps::before{
  content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;background:var(--line);
}
.step{position:relative;}
.step::before{
  content:"";position:absolute;left:-28px;top:8px;width:12px;height:12px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px rgba(31,209,178,0.16),0 0 14px rgba(31,209,178,0.55);
}
.step__index{font-size:12px;letter-spacing:1px;color:var(--accent);font-variant-numeric:tabular-nums;}
.step__title{margin:6px 0 8px;font-size:16px;font-weight:600;color:var(--text-1);}
.step__text{font-size:14.5px;line-height:1.85;color:var(--text-2);}

/* ---------- compare ---------- */
.compare{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--bg-1);
}
.compare__col{padding:28px;}
.compare__col + .compare__col{border-left:1px solid var(--line);}
.compare__col h3{margin-bottom:6px;}
.compare__tag{font-size:12px;color:var(--text-3);margin-bottom:16px;}
.compare__col .dot-list li::before{background:var(--accent);}
.compare__col--good .dot-list li::before{background:var(--brand);}

/* ---------- scene grid ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.scene-card{
  position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--line);
  background:var(--bg-1);box-shadow:var(--shadow-1);
  transition:transform 180ms var(--ease),border-color 180ms var(--ease);
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,0.4);}
.scene-card__media{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--bg-2);}
.scene-card__media img{width:100%;height:100%;object-fit:cover;}
.scene-card__media .badge{position:absolute;left:12px;bottom:12px;}
.scene-card__body{padding:18px 20px 22px;}
.scene-card__body h3{font-size:16px;margin-bottom:6px;}
.scene-card__body p{font-size:13.5px;line-height:1.8;color:var(--text-3);}

/* ---------- faq ---------- */
.faq{max-width:860px;margin:0 auto;border-top:1px solid var(--line);}
.faq__item{border-bottom:1px solid var(--line);}
.faq__item summary{
  display:flex;align-items:center;gap:14px;justify-content:space-between;
  padding:20px 0 20px 16px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--text-2);
  transition:color 180ms var(--ease);
  position:relative;
}
.faq__item summary::-webkit-details-marker{display:none;}
.faq__item summary::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:3px;
  border-radius:3px;background:transparent;transition:background 180ms var(--ease);
}
.faq__item summary:hover{color:var(--text-1);}
.faq__item[open] summary{color:var(--text-1);}
.faq__item[open] summary::before{background:var(--brand);}
.faq__plus{
  flex-shrink:0;width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-3);transition:transform 180ms var(--ease),color 180ms var(--ease);
}
.faq__item[open] .faq__plus{transform:rotate(45deg);color:var(--brand);}
.faq__answer{padding:0 0 22px 16px;font-size:15px;line-height:1.9;color:var(--text-2);max-width:780px;}

/* ---------- cta band ---------- */
.cta-band{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:linear-gradient(160deg,rgba(31,209,178,0.08),rgba(11,18,32,0.9) 55%);
}
.cta-band__inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:56px 0;flex-wrap:wrap;
}
.cta-band h2{font-size:26px;margin-bottom:8px;}
.cta-band p{font-size:14.5px;color:var(--text-2);max-width:620px;}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-0);padding-top:64px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand__name{font-size:16px;}
.footer-desc{font-size:13px;line-height:1.9;color:var(--text-3);max-width:320px;}
.footer-mail{display:inline-block;margin-top:14px;font-size:13px;color:var(--brand);}
.footer-col h3{font-size:14px;color:var(--text-1);margin-bottom:16px;font-weight:600;}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul a{font-size:13.5px;color:var(--text-3);}
.footer-col ul a:hover{color:var(--brand);}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
.footer-tags a{
  font-size:12px;color:var(--text-3);padding:5px 10px;border-radius:var(--r-sm);
  border:1px solid var(--line);transition:color 180ms var(--ease),border-color 180ms var(--ease);
}
.footer-tags a:hover{color:var(--brand);border-color:var(--brand);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:48px;padding:20px 0;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,0.6);
  opacity:0;visibility:hidden;transition:opacity 200ms var(--ease),visibility 200ms var(--ease);
  z-index:95;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

@media (max-width:1440px){
  .scene-grid{grid-template-columns:repeat(4,1fr);}
}
@media (max-width:1200px){
  .scene-grid{grid-template-columns:repeat(3,1fr);}
  .page-hero__grid{gap:40px;}
  .steps-layout{gap:36px;}
}
@media (max-width:992px){
  :root{--pad-section:72px;}
  .nav{
    position:fixed;top:0;right:0;bottom:0;width:280px;z-index:100;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg-1);border-left:1px solid var(--line);
    padding:24px 20px;margin:0;
    transform:translateX(100%);transition:transform 220ms var(--ease);
    overflow-y:auto;
  }
  .nav.is-open{transform:translateX(0);}
  .nav__link{height:44px;padding:0;font-size:15px;border-bottom:1px solid var(--line);}
  .nav__link.is-active::after{display:none;}
  .nav__link.is-active{color:var(--brand);}
  .burger{display:inline-flex;}
  .header-link{display:none;}
  .page-hero__grid{grid-template-columns:1fr;}
  .page-hero__media{order:-1;aspect-ratio:16/9;}
  .split{grid-template-columns:1fr;}
  .split__side{grid-template-rows:auto auto;grid-template-columns:1fr 1fr;}
  .steps-layout{grid-template-columns:1fr;}
  .steps-aside{position:static;}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:20px;padding:28px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  :root{--pad-section:56px;}
  .container{padding:0 16px;}
  .header-main__inner{gap:12px;min-height:58px;}
  .nav__link{height:52px;}
  .page-hero{padding:28px 0 48px;}
  .page-hero__lead{font-size:16px;}
  .section__head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px;}
  .compare{grid-template-columns:1fr;}
  .compare__col + .compare__col{border-left:0;border-top:1px solid var(--line);}
  .cta-band__inner{padding:40px 0;}
  .scene-grid{grid-template-columns:1fr 1fr;gap:16px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  :root{--pad-section:48px;}
  h2{font-size:23px;}
  .scene-grid{grid-template-columns:1fr;}
  .split__side{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:16px;}
  .stat__num{font-size:28px;}
  .footer-grid{grid-template-columns:1fr;}
  .page-hero__actions .btn{width:100%;}
  .search-bar form{flex-direction:column;}
  .search-bar .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#111A2B;
  --line:rgba(126,166,210,0.14);
  --brand:#1FD1B2;
  --brand-soft:rgba(31,209,178,0.12);
  --accent:#F5A524;
  --text-1:#E8EEF7;
  --text-2:#A7B4C8;
  --text-3:#6E7E96;
  --danger:#FF6B6B;
  --ok:#3DD68C;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:22px;
  --shadow-1:0 8px 24px rgba(0,0,0,0.35);
  --shadow-2:0 18px 40px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.06);
  --glow:0 0 0 1px rgba(31,209,178,0.5), 0 8px 24px rgba(31,209,178,0.28);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  color:var(--text-2);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(760px 440px at 88% -10%, rgba(31,209,178,0.08), transparent 70%),
    linear-gradient(rgba(126,166,210,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126,166,210,0.05) 1px, transparent 1px);
  background-size:auto, 40px 40px, 40px 40px;
  background-repeat:no-repeat, repeat, repeat;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;line-height:1.35}
h1{font-size:clamp(30px,4vw,46px);line-height:1.25}
h2{font-size:28px}
h3{font-size:20px;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand)}
img{max-width:100%;display:block;border-style:none;background-color:var(--bg-2)}
button{font-family:inherit;font-size:inherit}
svg{display:block}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head__text h2{display:flex;align-items:center;gap:12px}
.section-head__text h2::before{content:"";width:4px;height:24px;border-radius:2px;background:var(--brand);flex:none}
.section-head__note{margin-top:8px;font-size:14px;color:var(--text-3)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap}
.link-more span{transition:transform .18s var(--ease)}
.link-more:hover span{transform:translateX(3px)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{background:var(--brand);color:#04211C;box-shadow:var(--glow)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(31,209,178,0.42);color:#04211C}
.btn--primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(31,209,178,0.5),0 4px 14px rgba(31,209,178,0.24)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text-1)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn--ghost:active{transform:translateY(1px)}
.btn--text{background:none;border:0;padding:0;height:auto;color:var(--brand);font-weight:600}
.btn--text span{transition:transform .18s var(--ease)}
.btn--text:hover span{transform:translateX(3px)}
.btn--sm{height:36px;padding:0 16px;font-size:14px;border-radius:var(--r-md)}
.btn[disabled]{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}

/* ===== 徽章 / 标签 ===== */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-sm);background:var(--brand-soft);color:var(--brand);
  font-size:12px;font-weight:600;letter-spacing:.2px;white-space:nowrap;
}
.badge--accent{background:rgba(245,165,36,0.14);color:var(--accent)}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border-radius:var(--r-sm);border:1px solid var(--line);
  font-size:13px;color:var(--text-2);transition:border-color .18s var(--ease),color .18s var(--ease);
}
.tag:hover{border-color:rgba(31,209,178,0.4);color:var(--brand)}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(6,10,18,0.82);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease);
}
.header-main__inner{display:flex;align-items:center;gap:24px;height:64px;transition:height .2s var(--ease)}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand__mark{display:inline-flex;width:24px;height:24px;align-items:center;justify-content:center;flex:none}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-size:16px;font-weight:700;color:var(--text-1);letter-spacing:.2px}
.brand__sub{font-size:10px;letter-spacing:1.2px;color:var(--text-3);margin-top:2px}
.nav{display:flex;align-items:center;gap:4px;margin-left:12px}
.nav__link{
  position:relative;display:inline-flex;align-items:center;height:36px;padding:0 12px;
  font-size:14px;font-weight:500;color:var(--text-2);border-radius:var(--r-sm);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav__link:hover{color:var(--text-1);background:rgba(255,255,255,0.04)}
.nav__link.is-active{color:var(--brand)}
.nav__link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--brand);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.header-link{font-size:13px;color:var(--text-3)}
.header-link:hover{color:var(--brand)}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;
  border-radius:var(--r-sm);border:1px solid var(--line);background:rgba(255,255,255,0.03);
  color:var(--text-2);cursor:pointer;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:rgba(31,209,178,0.4)}
.burger{display:none}
.search-bar{display:none;border-top:1px solid var(--line);background:rgba(6,10,18,0.94)}
.search-bar.is-open{display:block}
.search-bar form{display:flex;gap:12px;padding:14px 0}
.search-bar input{
  flex:1;height:44px;padding:0 14px;border-radius:var(--r-md);
  border:1px solid var(--line);background:rgba(8,14,24,0.7);color:var(--text-1);font-size:15px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.search-bar input::placeholder{color:var(--text-3)}
.search-bar input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,209,178,0.12)}
.header-trend{border-top:1px solid var(--line);height:34px;overflow:hidden;transition:height .2s var(--ease),opacity .2s var(--ease)}
.trend__inner{display:flex;align-items:center;gap:18px;height:34px;overflow-x:auto;scrollbar-width:none}
.trend__inner::-webkit-scrollbar{display:none}
.trend__label{font-size:12px;color:var(--text-3);letter-spacing:1px;white-space:nowrap}
.trend__item{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--text-2);white-space:nowrap;transition:color .18s var(--ease)}
.trend__item::before{content:"";width:5px;height:5px;border-radius:1px;background:var(--accent);flex:none}
.trend__item:hover{color:var(--brand)}
.site-header.is-compact .header-main__inner{height:52px}
.site-header.is-compact .header-trend{height:0;opacity:0;border-top-color:transparent}

/* ===== 抽屉导航 ===== */
.drawer{position:fixed;inset:0;z-index:200;display:none}
.drawer.is-open{display:block}
.drawer__mask{position:absolute;inset:0;background:rgba(0,0,0,0.6)}
.drawer__panel{
  position:absolute;top:0;right:0;bottom:0;width:min(340px,86vw);
  background:var(--bg-1);border-left:1px solid var(--line);
  padding:20px;display:flex;flex-direction:column;gap:20px;overflow-y:auto;
  animation:drawerIn .22s var(--ease);
}
@keyframes drawerIn{from{transform:translateX(24px);opacity:.4}to{transform:translateX(0);opacity:1}}
.drawer__head{display:flex;align-items:center;justify-content:space-between}
.drawer__nav{display:flex;flex-direction:column}
.drawer__nav a{
  display:flex;align-items:center;height:44px;font-size:15px;color:var(--text-1);
  border-bottom:1px solid var(--line);
}
.drawer__nav a.is-active{color:var(--brand)}
.drawer__trend{display:flex;flex-direction:column;gap:10px}
.drawer__trend .trend__item{height:26px}
.drawer__cta{margin-top:auto}

/* ===== 面包屑 ===== */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--text-3);margin-bottom:22px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(126,166,210,0.35)}
.breadcrumb .current{color:var(--text-3);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ===== 文章首屏 ===== */
.article-hero{
  position:relative;
  padding:56px 0 44px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg, rgba(11,18,32,0.4), rgba(6,10,18,0.95)), url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.article-title{max-width:880px;font-size:clamp(30px,3.6vw,42px);line-height:1.3;color:var(--text-1)}
.article-summary{max-width:820px;margin-top:16px;font-size:17px;line-height:1.85;color:var(--text-2)}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:22px;font-size:13px;color:var(--text-3)}
.article-meta .divider{width:1px;height:12px;background:var(--line)}
.article-meta .strong{color:var(--text-2)}

/* ===== 文章布局 ===== */
.article-layout{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;padding:56px 0 8px}
.article-main{grid-column:span 8;min-width:0}
.article-side{grid-column:span 4;min-width:0}
.article-side__sticky{position:sticky;top:112px;display:flex;flex-direction:column;gap:20px}

.article-panel{
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px;box-shadow:var(--shadow-1);
}
.article-body{max-width:720px;font-size:16px;line-height:1.9;color:var(--text-2);word-break:break-word}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  position:relative;margin:40px 0 16px;padding-left:16px;
  font-size:24px;line-height:1.45;color:var(--text-1);
}
.article-body h2::before{content:"";position:absolute;left:0;top:6px;width:4px;height:20px;border-radius:2px;background:var(--brand)}
.article-body h3{margin:24px 0 12px;font-size:20px;line-height:1.5;color:var(--text-1)}
.article-body h4{margin:20px 0 10px;font-size:17px;color:var(--text-1)}
.article-body p{margin:0 0 1.2em;line-height:1.9}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.4em}
.article-body ul{list-style:none}
.article-body ul > li{position:relative;margin-bottom:.6em}
.article-body ul > li::before{content:"";position:absolute;left:-1em;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.article-body ol{list-style:decimal}
.article-body ol > li{margin-bottom:.6em;padding-left:.2em}
.article-body ol::marker{color:var(--brand)}
.article-body strong{color:var(--text-1);font-weight:700}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;border-left:3px solid var(--brand);
  background:rgba(31,209,178,0.06);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(31,209,178,0.35)}
.article-body a:hover{border-bottom-color:var(--brand)}
.article-body img{width:100%;height:auto;margin:24px 0 8px;border-radius:var(--r-md);background-color:var(--bg-2)}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:8px;font-size:13px;color:var(--text-3);text-align:center}
.article-body table{width:100%;margin:24px 0;border-collapse:collapse;font-size:14px;display:block;overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md)}
.article-body th,.article-body td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left;line-height:44px;line-height:1.7}
.article-body th{background:var(--bg-2);color:var(--text-1);font-weight:600;white-space:nowrap}
.article-body tr:last-child td{border-bottom:0}
.article-body code{
  padding:2px 6px;border-radius:var(--r-sm);background:var(--bg-2);
  color:var(--text-1);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;
}
.article-body pre{
  margin:24px 0;padding:18px;border-radius:var(--r-md);background:var(--bg-2);
  border:1px solid var(--line);overflow-x:auto;
}
.article-body pre code{padding:0;background:none;font-size:13px;line-height:1.8}
.article-body hr{margin:32px 0;border:0;border-top:1px solid var(--line)}

/* 空态 */
.article-empty{text-align:center;padding:56px 20px;max-width:720px}
.article-empty__icon{display:flex;justify-content:center;margin-bottom:16px;color:var(--text-3)}
.article-empty h2{font-size:22px;margin-bottom:10px}
.article-empty p{font-size:15px;color:var(--text-3);margin-bottom:22px}

/* 标签与翻页 */
.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line)}
.article-tags__label{font-size:13px;color:var(--text-3);margin-right:4px}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px}
.post-nav__card{
  display:block;padding:20px;border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,0.06),rgba(255,255,255,0.02));
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.post-nav__card:hover{transform:translateY(-3px);border-color:rgba(31,209,178,0.4);box-shadow:var(--shadow-2);color:inherit}
.post-nav__label{font-size:12px;color:var(--text-3);letter-spacing:.5px}
.post-nav__title{margin-top:8px;font-size:15px;font-weight:600;color:var(--text-1);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.post-nav__card:hover .post-nav__title{color:var(--brand)}

/* 侧栏 */
.side-card{
  border-radius:var(--r-lg);border:1px solid var(--line);padding:20px;
  background:linear-gradient(160deg,rgba(255,255,255,0.06),rgba(255,255,255,0.02));
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .18s var(--ease);
}
.side-card:hover{border-color:rgba(31,209,178,0.4)}
.side-card__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.side-card__head h2,.side-card__head h3{font-size:16px;color:var(--text-1);display:flex;align-items:center;gap:8px}
.side-card__head h2::before,.side-card__head h3::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand)}
.side-card__head .badge{height:22px}
.side-list li + li{margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
.side-list a{display:flex;gap:10px;align-items:flex-start;font-size:14px;line-height:1.6;color:var(--text-2)}
.side-list a:hover{color:var(--brand)}
.side-list__num{flex:none;font-size:12px;font-weight:700;color:var(--accent);line-height:1.8;font-variant-numeric:tabular-nums}
.side-list__text{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.channel-links{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.channel-links .btn{width:100%}
.side-note{font-size:13px;line-height:1.8;color:var(--text-3);margin-top:12px}

/* 相关推荐 */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:var(--bg-1);overflow:hidden;
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,0.4);box-shadow:var(--shadow-2)}
.news-card__cover{position:relative;aspect-ratio:16/9;overflow:hidden;background-color:var(--bg-2);
  background-image:linear-gradient(rgba(126,166,210,0.08) 1px,transparent 1px),linear-gradient(90deg,rgba(126,166,210,0.08) 1px,transparent 1px);
  background-size:24px 24px}
.news-card__cover img{width:100%;height:100%;object-fit:cover}
.news-card__body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-card__title{font-size:16px;font-weight:600;line-height:1.55;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover .news-card__title{color:var(--brand)}
.news-card__desc{font-size:14px;line-height:1.75;color:var(--text-3);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card__meta{display:flex;align-items:center;gap:10px;margin-top:auto;font-size:12px;color:var(--text-3)}
.news-card__arrow{margin-left:auto;color:var(--brand);transition:transform .18s var(--ease)}
.news-card:hover .news-card__arrow{transform:translateX(3px)}

/* CTA 条 */
.cta-band{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:linear-gradient(120deg, rgba(17,26,43,0.9), rgba(6,10,18,0.9));
}
.cta-band__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:40px 0;flex-wrap:wrap}
.cta-band h2{font-size:24px}
.cta-band p{margin-top:8px;font-size:14px;color:var(--text-3);max-width:640px}

/* ===== 页脚 ===== */
.site-footer{border-top:1px solid var(--line);background:var(--bg-1);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand__name{font-size:16px;font-weight:700;color:var(--text-1)}
.footer-desc{font-size:13px;line-height:1.9;color:var(--text-3);max-width:320px}
.footer-mail{display:inline-block;margin-top:14px;font-size:13px;color:var(--text-2)}
.footer-mail:hover{color:var(--brand)}
.footer-col h3{font-size:14px;color:var(--text-1);margin-bottom:16px;font-weight:600}
.footer-col ul li + li{margin-top:10px}
.footer-col ul a{font-size:13px;color:var(--text-3)}
.footer-col ul a:hover{color:var(--brand)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tags a{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-sm);border:1px solid var(--line);font-size:12px;color:var(--text-3)}
.footer-tags a:hover{border-color:rgba(31,209,178,0.4);color:var(--brand)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:44px;padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ===== 响应式 ===== */
@media (max-width:1200px){
  .article-title{font-size:clamp(28px,3.4vw,38px)}
}
@media (max-width:992px){
  .nav{display:none}
  .header-link{display:none}
  .burger{display:inline-flex}
  .header-actions .btn--primary{display:none}
  .section{padding:72px 0}
  .article-layout{grid-template-columns:repeat(6,1fr);gap:20px;padding-top:44px}
  .article-main{grid-column:span 6}
  .article-side{grid-column:span 6}
  .article-side__sticky{position:static}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .header-main__inner{height:58px;gap:14px}
  .brand__name{font-size:15px}
  .article-hero{padding:36px 0 32px}
  .article-summary{font-size:16px}
  .article-panel{padding:22px}
  .article-body h2{font-size:21px;margin-top:32px}
  .article-body h3{font-size:18px}
  .post-nav{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .cta-band__inner{padding:32px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:480px){
  .article-layout{grid-template-columns:1fr;gap:16px}
  .article-main,.article-side{grid-column:span 1}
  .article-meta{gap:10px;font-size:12px}
  .btn{height:42px;padding:0 18px;font-size:14px}
  .footer-grid{grid-template-columns:1fr}
  .article-tags{gap:8px}
  .trend__inner{gap:14px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: category3 */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#111A2B;
  --line:rgba(126,166,210,0.14);
  --brand:#1FD1B2;
  --brand-soft:rgba(31,209,178,0.12);
  --accent:#F5A524;
  --text-1:#E8EEF7;
  --text-2:#A7B4C8;
  --text-3:#6E7E96;
  --danger:#FF6B6B;
  --ok:#3DD68C;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:22px;
  --shadow-card:0 18px 40px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.06);
  --shadow-soft:0 8px 24px rgba(0,0,0,0.35);
  --glow:0 0 0 1px rgba(31,209,178,0.5), 0 8px 24px rgba(31,209,178,0.28);
  --glow-hover:0 12px 34px rgba(31,209,178,0.42);
  --ease:cubic-bezier(.2,.7,.3,1);
  --header-h:112px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:120px}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  color:var(--text-2);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(900px 480px at 88% -8%, rgba(31,209,178,0.08), transparent 65%),
    linear-gradient(rgba(126,166,210,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126,166,210,0.05) 1px, transparent 1px);
  background-size:auto,40px 40px,40px 40px;
  background-repeat:no-repeat,repeat,repeat;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
svg{display:block}
a{color:var(--text-1);text-decoration:none;transition:color 180ms var(--ease)}
a:hover{color:var(--brand)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--text-1);letter-spacing:.2px}
h1{font-size:clamp(30px,4vw,46px);line-height:1.25;font-weight:700}
h2{font-size:28px;line-height:1.35;font-weight:700}
h3{font-size:20px;line-height:1.5;font-weight:600}
p{margin:0}
ul,ol{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;background:transparent;
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease),border-color 180ms var(--ease),color 180ms var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#04211C;box-shadow:var(--glow)}
.btn--primary:hover{color:#04211C;box-shadow:var(--glow-hover);transform:translateY(-2px)}
.btn--primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(31,209,178,0.5),0 4px 14px rgba(31,209,178,0.24)}
.btn--ghost{border-color:var(--line);color:var(--text-1);background:rgba(255,255,255,0.02)}
.btn--ghost:hover{border-color:var(--brand);color:var(--text-1);transform:translateY(-2px)}
.btn--ghost:active{transform:translateY(0)}
.btn--sm{height:38px;padding:0 18px;font-size:14px}
.btn--text{height:auto;padding:0;color:var(--brand);font-weight:600;gap:6px}
.btn--text:hover{color:var(--brand)}
.btn--text:hover .arrow{transform:translateX(3px)}
.btn--text .arrow{display:inline-block;transition:transform 180ms var(--ease)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- Badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
  border-radius:var(--r-sm);background:var(--brand-soft);color:var(--brand);
  font-size:12px;font-weight:600;line-height:1;white-space:nowrap;
}
.badge--accent{background:rgba(245,165,36,0.14);color:var(--accent)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(6,10,18,0.82);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:box-shadow 200ms var(--ease);
}
.site-header.is-scrolled{box-shadow:0 12px 30px rgba(0,0,0,0.45)}
.header-main__inner{display:flex;align-items:center;gap:26px;height:60px;transition:height 200ms var(--ease)}
.site-header.is-scrolled .header-main__inner{height:52px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand__mark{display:inline-flex;width:24px;height:24px}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__name{font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:.3px;white-space:nowrap}
.brand__sub{font-size:10px;color:var(--text-3);letter-spacing:.5px}
.nav{display:flex;align-items:center;gap:22px;margin-left:6px}
.nav__link{
  position:relative;font-size:14.5px;font-weight:500;color:var(--text-2);
  padding:6px 0;white-space:nowrap;
}
.nav__link:hover{color:var(--text-1)}
.nav__link.is-active{color:var(--brand);font-weight:600}
.nav__link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:var(--r-sm);
  background:transparent;border:1px solid transparent;color:var(--text-2);
  cursor:pointer;transition:color 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:var(--line);background:var(--bg-2)}
.header-link{font-size:13.5px;color:var(--text-2)}
.header-link:hover{color:var(--brand)}
.burger{display:none}
.search-bar{
  display:none;border-top:1px solid var(--line);background:rgba(11,18,32,0.96);
}
.search-bar.is-open{display:block}
.search-bar form{display:flex;gap:12px;padding:14px 0}
.search-bar input{
  flex:1;height:44px;padding:0 16px;border-radius:var(--r-md);
  background:rgba(8,14,24,0.7);border:1px solid var(--line);color:var(--text-1);
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.search-bar input::placeholder{color:var(--text-3)}
.search-bar input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,209,178,0.12)}
.header-trend{
  border-top:1px solid var(--line);
  background:rgba(6,10,18,0.6);
  max-height:34px;overflow:hidden;
  transition:max-height 200ms var(--ease),opacity 200ms var(--ease);
}
.site-header.is-scrolled .header-trend{max-height:0;opacity:0}
.trend__inner{display:flex;align-items:center;gap:18px;height:33px;overflow-x:auto;scrollbar-width:none}
.trend__inner::-webkit-scrollbar{display:none}
.trend__label{font-size:12px;color:var(--text-3);flex:0 0 auto}
.trend__item{
  display:inline-flex;align-items:center;gap:7px;font-size:12px;color:var(--text-2);
  white-space:nowrap;flex:0 0 auto;
}
.trend__item::before{content:"";width:5px;height:5px;border-radius:2px;background:var(--accent)}
.trend__item:hover{color:var(--brand)}

/* ---------- Mobile drawer ---------- */
.drawer-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,0.6);z-index:95;
  opacity:0;visibility:hidden;transition:opacity 200ms var(--ease),visibility 200ms var(--ease);
}
.drawer-overlay.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);z-index:96;
  background:var(--bg-1);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform 240ms var(--ease);
  padding:20px 20px 32px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer__title{font-size:14px;color:var(--text-3);letter-spacing:1px}
.drawer__close{
  width:34px;height:34px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:transparent;color:var(--text-2);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
}
.drawer__close:hover{color:var(--brand);border-color:var(--brand)}
.drawer__nav{display:flex;flex-direction:column;margin-bottom:22px}
.drawer__nav a{
  display:flex;align-items:center;height:44px;font-size:15px;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer__nav a.is-active{color:var(--brand);font-weight:600}
.drawer__sub{font-size:12px;color:var(--text-3);margin-bottom:10px}
.drawer__trend{display:flex;flex-direction:column;gap:2px;margin-bottom:22px}
.drawer__trend a{font-size:13px;color:var(--text-2);height:34px;display:flex;align-items:center;gap:8px}
.drawer__trend a::before{content:"";width:5px;height:5px;border-radius:2px;background:var(--accent)}
.drawer .btn{width:100%}

/* ---------- Crumbs ---------- */
.crumbs{padding:22px 0 0;font-size:12px;color:var(--text-3)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;padding:0}
.crumbs li{display:inline-flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:var(--text-3);opacity:.6}
.crumbs a{color:var(--text-2)}
.crumbs a:hover{color:var(--brand)}
.crumbs .current{color:var(--text-3)}

/* ---------- Page hero ---------- */
.page-hero{padding:26px 0 0}
.page-hero__box{
  position:relative;overflow:hidden;border-radius:var(--r-xl);
  border:1px solid var(--line);
  background:var(--bg-2) url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  box-shadow:var(--shadow-card);
  isolation:isolate;
}
.page-hero__box::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(96deg,rgba(6,10,18,0.96) 0%,rgba(6,10,18,0.88) 44%,rgba(6,10,18,0.52) 78%,rgba(6,10,18,0.32) 100%);
}
.page-hero__inner{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:36px;align-items:end;
  padding:56px 44px;
}
.page-hero__eyebrow{display:inline-flex;margin-bottom:16px}
.page-hero__title{max-width:760px}
.page-hero__lead{margin-top:16px;font-size:16px;line-height:1.85;color:var(--text-2);max-width:660px}
.page-hero__stats{display:flex;gap:32px;text-align:right}
.page-hero__stat strong{
  display:block;font-size:30px;font-weight:700;color:var(--accent);line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.page-hero__stat span{font-size:12.5px;color:var(--text-3)}
.page-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--alt{background:var(--bg-1);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:32px;
  margin-bottom:40px;flex-wrap:wrap;
}
.section-head__main{max-width:720px}
.section-head__main h2{
  position:relative;padding-left:16px;
}
.section-head__main h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:2px;
  background:var(--brand);
}
.section-lead{margin-top:12px;font-size:14px;line-height:1.85;color:var(--text-2);padding-left:16px}
.section-more{font-size:14px;color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.section-more:hover{color:var(--brand)}
.section-more span{transition:transform 180ms var(--ease)}
.section-more:hover span{transform:translateX(3px)}

/* ---------- Scene cards (2x2) ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.scene-card{
  display:grid;grid-template-columns:200px minmax(0,1fr) ;gap:0;overflow:hidden;
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,0.06),rgba(255,255,255,0.02));
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  transition:transform 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,0.4);box-shadow:var(--shadow-soft)}
.scene-card__media{position:relative;background:var(--bg-2);overflow:hidden}
.scene-card__media img{width:100%;height:100%;min-height:170px;object-fit:cover;transition:transform 320ms var(--ease)}
.scene-card:hover .scene-card__media img{transform:scale(1.04)}
.scene-card__body{padding:22px 24px;display:flex;flex-direction:column;gap:10px}
.scene-card__body h3{font-size:18px}
.scene-card__body p{font-size:14px;line-height:1.8;color:var(--text-2)}
.scene-card__meta{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:6px;font-size:12.5px;color:var(--text-3)}

/* ---------- Timeline ---------- */
.timeline-wrap{display:grid;grid-template-columns:320px minmax(0,1fr);gap:48px;align-items:start}
.timeline-aside{position:sticky;top:120px}
.timeline-aside h2{position:relative;padding-left:16px}
.timeline-aside h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:2px;background:var(--brand);
}
.timeline-aside p{margin-top:14px;font-size:14.5px;line-height:1.9;color:var(--text-2)}
.timeline{position:relative;padding-left:34px;margin:0;list-style:none}
.timeline::before{
  content:"";position:absolute;left:5px;top:10px;bottom:10px;width:1px;background:var(--line);
}
.step{position:relative;padding:0 0 34px 0}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:-34px;top:8px;width:11px;height:11px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 4px rgba(245,165,36,0.14);
}
.step__no{font-size:12px;color:var(--text-3);letter-spacing:1px}
.step h3{margin:6px 0 8px;font-size:17px}
.step p{font-size:14.5px;line-height:1.85;color:var(--text-2)}
.step__list{margin-top:10px;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.step__list li{
  font-size:12.5px;color:var(--text-2);background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--r-sm);padding:4px 10px;
}

/* ---------- Symptom table ---------- */
.symtable{border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--bg-1)}
.symtable__head,.symtable__row{
  display:grid;grid-template-columns:1.1fr 1.3fr 1.6fr;gap:24px;
  padding:18px 26px;align-items:start;
}
.symtable__head{background:var(--bg-2);font-size:13px;color:var(--text-3);letter-spacing:.5px}
.symtable__row{border-top:1px solid var(--line);font-size:14.5px;line-height:1.8}
.symtable__row:hover{background:rgba(31,209,178,0.04)}
.symtable__row strong{color:var(--text-1);font-weight:600}
.symtable__row span{color:var(--text-2)}
.symtable__row em{font-style:normal;color:var(--brand)}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto;border-top:1px solid var(--line)}
.faq__item{border-bottom:1px solid var(--line)}
.faq__item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 4px 20px 0;cursor:pointer;list-style:none;
  font-size:16.5px;font-weight:600;color:var(--text-1);
  transition:color 180ms var(--ease);
}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary:hover{color:var(--brand)}
.faq__item .plus{
  flex:0 0 auto;position:relative;width:18px;height:18px;border-radius:50%;
  border:1px solid var(--line);transition:transform 200ms var(--ease),border-color 200ms var(--ease);
}
.faq__item .plus::before,.faq__item .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--text-2);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq__item .plus::before{width:8px;height:1.5px}
.faq__item .plus::after{width:1.5px;height:8px;transition:opacity 200ms var(--ease)}
.faq__item[open] summary{color:var(--text-1)}
.faq__item[open] .plus{transform:rotate(45deg);border-color:var(--brand)}
.faq__item[open] .plus::before{background:var(--brand)}
.faq__item[open] .plus::after{background:var(--brand)}
.faq__item .faq__answer{
  position:relative;padding:0 4px 22px 16px;font-size:15px;line-height:1.9;color:var(--text-2);
}
.faq__item .faq__answer::before{
  content:"";position:absolute;left:0;top:4px;bottom:24px;width:3px;border-radius:2px;background:var(--brand);
}
.faq__item .faq__answer p+p{margin-top:10px}

/* ---------- CTA band ---------- */
.cta-band{padding:0 0 96px}
.cta-band__inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  padding:40px 44px;border-radius:var(--r-xl);
  border:1px solid rgba(31,209,178,0.28);
  background:
    radial-gradient(600px 260px at 12% 0%, rgba(31,209,178,0.14), transparent 70%),
    var(--bg-1);
  box-shadow:var(--shadow-card);
}
.cta-band__text h2{font-size:24px}
.cta-band__text p{margin-top:10px;font-size:14.5px;color:var(--text-2);max-width:640px}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-1);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand__name{font-size:16px}
.footer-desc{font-size:13px;line-height:1.85;color:var(--text-2);max-width:320px}
.footer-mail{display:inline-block;margin-top:14px;font-size:13px;color:var(--brand)}
.footer-col h3{font-size:14px;color:var(--text-1);margin-bottom:16px;font-weight:600}
.footer-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:13.5px;color:var(--text-2)}
.footer-col ul a:hover{color:var(--brand)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tags a{
  font-size:12.5px;color:var(--text-2);padding:5px 10px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:rgba(255,255,255,0.02);transition:all 180ms var(--ease);
}
.footer-tags a:hover{color:var(--brand);border-color:rgba(31,209,178,0.4);background:var(--brand-soft)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ---------- Animations ---------- */
.fade-up{opacity:0;transform:translateY(8px);animation:fadeUp 240ms var(--ease) forwards}
.fade-up.d1{animation-delay:60ms}
.fade-up.d2{animation-delay:120ms}
.fade-up.d3{animation-delay:180ms}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}

/* ---------- Breakpoints ---------- */
@media (max-width:1200px){
  .page-hero__inner{padding:48px 34px;grid-template-columns:minmax(0,1fr)}
  .page-hero__stats{justify-content:flex-start;text-align:left;gap:26px}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .timeline-wrap{grid-template-columns:280px minmax(0,1fr);gap:36px}
}
@media (max-width:992px){
  .nav{display:none}
  .header-link{display:none}
  .burger{display:inline-flex}
  .header-main__inner{height:56px}
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .scene-grid{grid-template-columns:1fr}
  .scene-card{grid-template-columns:180px minmax(0,1fr)}
  .timeline-wrap{grid-template-columns:1fr;gap:28px}
  .timeline-aside{position:static}
  .symtable__head{display:none}
  .symtable__row{grid-template-columns:1fr;gap:6px;padding:18px 20px}
  .symtable__row em{display:inline}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-band{padding-bottom:72px}
  .cta-band__inner{padding:32px 28px}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .section--tight{padding:40px 0}
  .page-hero__inner{padding:36px 22px;gap:24px}
  .page-hero__lead{font-size:15px}
  .page-hero__stats{gap:20px;flex-wrap:wrap}
  .page-hero__stat strong{font-size:24px}
  .scene-card{grid-template-columns:1fr}
  .scene-card__media img{min-height:170px;height:180px}
  .section-head{gap:16px;margin-bottom:28px}
  .section-head__main h2{font-size:23px}
  .cta-band__inner{flex-direction:column;align-items:flex-start;padding:28px 22px}
  .cta-band__actions{width:100%}
  .cta-band__actions .btn{flex:1 1 auto}
  .footer-grid{gap:26px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .search-bar form{flex-direction:column}
  .search-bar .btn{width:100%}
}
@media (max-width:480px){
  .brand__name{font-size:15px}
  .brand__sub{font-size:9.5px}
  .header-actions{gap:8px}
  .header-actions .btn--primary{display:none}
  .footer-grid{grid-template-columns:1fr}
  .faq__item summary{font-size:15.5px;padding:16px 0}
  .step h3{font-size:16px}
  .page-hero__title{font-size:26px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .fade-up{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#111A2B;
  --line:rgba(126,166,210,.14);
  --brand:#1FD1B2;
  --brand-soft:rgba(31,209,178,.12);
  --accent:#F5A524;
  --text-1:#E8EEF7;
  --text-2:#A7B4C8;
  --text-3:#6E7E96;
  --danger:#FF6B6B;
  --ok:#3DD68C;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:22px;
  --shadow-1:0 8px 24px rgba(0,0,0,.35);
  --shadow-2:0 18px 40px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --glow:0 0 0 1px rgba(31,209,178,.5), 0 8px 24px rgba(31,209,178,.28);
  --glow-hover:0 12px 34px rgba(31,209,178,.42);
  --ease:cubic-bezier(.2,.7,.3,1);
  --maxw:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  background-image:
    radial-gradient(720px 380px at 88% -8%, rgba(31,209,178,.08), transparent 70%),
    linear-gradient(rgba(126,166,210,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126,166,210,.05) 1px, transparent 1px);
  background-size:auto, 40px 40px, 40px 40px;
  pointer-events:none;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand);}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;line-height:1.35;}
h1{font-size:clamp(30px,4vw,46px);line-height:1.25;}
h2{font-size:28px;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#04231E;box-shadow:var(--glow);}
.btn--primary:hover{background:#25E0BF;color:#04231E;transform:translateY(-2px);box-shadow:var(--glow-hover);}
.btn--primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(31,209,178,.5),0 4px 14px rgba(31,209,178,.24);}
.btn--ghost{border:1px solid var(--line);color:var(--text-1);background:transparent;}
.btn--ghost:hover{border-color:rgba(31,209,178,.55);color:var(--text-1);transform:translateY(-2px);}
.btn--ghost:active{transform:translateY(0);}
.btn--sm{height:36px;padding:0 16px;font-size:13px;border-radius:var(--r-sm);}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:600;}
.link-arrow svg{transition:transform .18s var(--ease);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-sm);
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.badge--accent{background:rgba(245,165,36,.14);color:var(--accent);}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(6,10,18,.82);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.header-main__inner{display:flex;align-items:center;gap:24px;height:68px;transition:height .2s var(--ease);}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{display:inline-flex;width:36px;height:36px;align-items:center;justify-content:center;border-radius:var(--r-sm);background:var(--brand-soft);}
.brand__text{display:flex;flex-direction:column;line-height:1.2;}
.brand__name{color:var(--text-1);font-size:16px;font-weight:700;letter-spacing:.01em;}
.brand__sub{color:var(--text-3);font-size:11px;letter-spacing:.14em;margin-top:2px;}
.nav{display:flex;align-items:center;gap:4px;}
.nav__link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  border-radius:var(--r-sm);font-size:15px;color:var(--text-2);transition:color .18s var(--ease),background .18s var(--ease);
}
.nav__link:hover{color:var(--text-1);background:rgba(255,255,255,.03);}
.nav__link.is-active{color:var(--brand);}
.nav__link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--brand);
  box-shadow:0 0 10px rgba(31,209,178,.8);
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:var(--r-sm);
  color:var(--text-2);transition:color .18s var(--ease),background .18s var(--ease);
}
.icon-btn:hover{color:var(--text-1);background:var(--bg-2);}
.header-link{font-size:13px;color:var(--text-3);padding:0 4px;}
.header-link:hover{color:var(--brand);}
.burger{display:none;}
.search-bar{max-height:0;overflow:hidden;transition:max-height .25s var(--ease);border-top:1px solid transparent;}
.search-bar.is-open{max-height:96px;border-top-color:var(--line);}
.search-bar form{display:flex;gap:12px;padding:14px 0;}
.search-bar input{
  flex:1;height:44px;padding:0 16px;border-radius:var(--r-md);
  background:rgba(8,14,24,.7);border:1px solid var(--line);color:var(--text-1);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.search-bar input::placeholder{color:var(--text-3);}
.search-bar input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,209,178,.12);}
.header-trend{border-top:1px solid var(--line);overflow:hidden;transition:max-height .2s var(--ease);max-height:44px;}
.trend__inner{display:flex;align-items:center;gap:18px;height:36px;overflow-x:auto;scrollbar-width:none;}
.trend__inner::-webkit-scrollbar{display:none;}
.trend__label{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--text-3);white-space:nowrap;}
.trend__label::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent);}
.trend__item{
  position:relative;display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--text-2);white-space:nowrap;
  padding-left:12px;
}
.trend__item::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:4px;border-radius:1px;background:var(--accent);}
.site-header.is-scrolled .header-main__inner{height:56px;}
.site-header.is-scrolled .header-trend{max-height:0;}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;z-index:200;
  background:var(--bg-1);border-left:1px solid var(--line);padding:24px;
  transform:translateX(102%);transition:transform .26s var(--ease);
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer__title{font-size:13px;letter-spacing:.12em;color:var(--text-3);}
.drawer__nav{display:flex;flex-direction:column;margin-bottom:24px;}
.drawer__nav a{
  display:flex;align-items:center;height:44px;padding:0 12px;border-radius:var(--r-sm);
  font-size:15px;color:var(--text-2);border-bottom:1px solid var(--line);
}
.drawer__nav a:hover{background:var(--bg-2);color:var(--text-1);}
.drawer__nav a.is-active{color:var(--brand);}
.drawer__trend{display:flex;flex-direction:column;gap:10px;}
.drawer__trend a{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2);}
.drawer__trend a::before{content:"";width:5px;height:5px;border-radius:1px;background:var(--accent);}
.drawer-mask{
  position:fixed;inset:0;z-index:190;background:rgba(0,0,0,.6);
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ---------- 面包屑 ---------- */
.crumbs{font-size:12px;color:var(--text-3);padding:26px 0 0;}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li:not(:last-child)::after{content:"/";color:rgba(110,126,150,.55);}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--brand);}
.crumbs .current{color:var(--text-3);}

/* ---------- 板块 ---------- */
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--alt{background:var(--bg-1);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:32px;margin-bottom:44px;flex-wrap:wrap;}
.section-head h2{position:relative;padding-left:16px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand);
}
.section-head__desc{margin-top:10px;font-size:14px;color:var(--text-3);max-width:640px;}

/* ---------- 分类首屏 ---------- */
.cat-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(105deg, rgba(6,10,18,.94) 0%, rgba(6,10,18,.86) 46%, rgba(6,10,18,.62) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.cat-hero__inner{display:grid;grid-template-columns:1fr 300px;gap:56px;align-items:end;padding:52px 0 64px;}
.cat-hero h1{margin:18px 0 18px;max-width:840px;}
.cat-hero__lead{font-size:17px;line-height:1.85;color:var(--text-2);max-width:720px;}
.cat-hero__tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.cat-hero__stat{
  border-left:1px solid var(--line);padding-left:24px;
  display:flex;flex-direction:column;gap:18px;
}
.cat-hero__stat-item span:first-child{
  display:block;font-size:32px;font-weight:700;color:var(--accent);line-height:1.2;
}
.cat-hero__stat-item span:last-child{display:block;font-size:12px;color:var(--text-3);margin-top:4px;}

/* ---------- 筛选 chip ---------- */
.filter-row{
  display:flex;flex-wrap:wrap;gap:10px;padding:24px 0 0;
}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:rgba(11,18,32,.7);color:var(--text-2);font-size:13px;
  transition:all .18s var(--ease);
}
.chip:hover{border-color:rgba(31,209,178,.45);color:var(--text-1);transform:translateY(-1px);}
.chip.is-active{background:var(--brand-soft);border-color:rgba(31,209,178,.55);color:var(--brand);font-weight:600;}

/* ---------- 卡片 ---------- */
.card{
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,.4);box-shadow:var(--shadow-2);}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.feat-card{padding:24px;display:flex;flex-direction:column;}
.feat-card__icon{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--brand);margin-bottom:18px;
}
.feat-card__badge{margin-bottom:12px;}
.feat-card h3{margin-bottom:10px;}
.feat-card p{font-size:14px;color:var(--text-2);line-height:1.85;}
.feat-card ul{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.feat-card li{position:relative;padding-left:16px;font-size:13px;color:var(--text-3);line-height:1.7;}
.feat-card li::before{
  content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--brand);
}

/* ---------- 对照区 ---------- */
.compare{
  display:grid;grid-template-columns:1fr 1px 1fr;gap:0;
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
}
.compare__col{padding:32px 36px;}
.compare__col h3{display:flex;align-items:center;gap:10px;margin-bottom:20px;font-size:18px;}
.compare__col h3 .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);}
.compare__col.is-right h3 .dot{background:var(--accent);}
.compare__divider{background:var(--line);}
.compare__col ul{display:flex;flex-direction:column;gap:16px;}
.compare__col li{font-size:14px;line-height:1.8;color:var(--text-2);padding-left:18px;position:relative;}
.compare__col li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:1px;background:var(--text-3);
}
.compare__col li b{color:var(--text-1);font-weight:600;}

/* ---------- 时间轴 ---------- */
.steps{display:grid;grid-template-columns:300px 1fr;gap:56px;}
.steps__aside h2{padding-left:16px;position:relative;margin-bottom:14px;}
.steps__aside h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand);}
.steps__aside p{font-size:14px;color:var(--text-3);line-height:1.85;}
.steps__list{position:relative;padding-left:30px;}
.steps__list::before{
  content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;background:var(--line);
}
.step{position:relative;padding-bottom:36px;}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";position:absolute;left:-30px;top:7px;width:12px;height:12px;border-radius:50%;
  background:var(--bg-0);border:2px solid var(--brand);
  box-shadow:0 0 0 4px rgba(31,209,178,.14),0 0 12px rgba(31,209,178,.55);
}
.step__no{font-size:12px;color:var(--accent);letter-spacing:.14em;font-weight:600;font-variant-numeric:tabular-nums;}
.step h3{margin:6px 0 8px;font-size:17px;}
.step p{font-size:14px;color:var(--text-2);line-height:1.85;}

/* ---------- 场景小卡 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.scene-card{display:flex;gap:18px;padding:22px;align-items:flex-start;}
.scene-card__thumb{
  width:96px;height:96px;flex-shrink:0;border-radius:var(--r-md);overflow:hidden;background:var(--bg-2);
}
.scene-card__thumb img{width:100%;height:100%;object-fit:cover;}
.scene-card h3{font-size:16px;margin-bottom:8px;}
.scene-card p{font-size:13px;color:var(--text-3);line-height:1.75;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0 22px 0;font-size:16px;color:var(--text-2);transition:color .18s var(--ease),padding .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--text-1);}
.faq-item summary .plus{
  flex-shrink:0;width:18px;height:18px;position:relative;transition:transform .22s var(--ease);
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--text-3);border-radius:1px;
}
.faq-item summary .plus::before{left:0;top:8px;width:18px;height:2px;}
.faq-item summary .plus::after{left:8px;top:0;width:2px;height:18px;}
.faq-item[open] summary{color:var(--text-1);padding-left:16px;border-left:3px solid var(--brand);}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-item[open] summary .plus::before,
.faq-item[open] summary .plus::after{background:var(--brand);}
.faq-body{padding:0 0 22px 16px;font-size:15px;line-height:1.9;color:var(--text-2);}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-xl);
  border:1px solid rgba(31,209,178,.24);
  background-image:
    linear-gradient(100deg,rgba(6,10,18,.95),rgba(11,18,32,.9)),
    url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
  padding:48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:26px;margin-bottom:10px;}
.cta-band p{font-size:14px;color:var(--text-2);max-width:600px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-desc{font-size:13px;color:var(--text-3);line-height:1.9;max-width:320px;}
.footer-mail{display:inline-block;margin-top:16px;font-size:13px;color:var(--brand);}
.footer-col h3{font-size:14px;color:var(--text-1);margin-bottom:18px;font-weight:600;}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col li a{font-size:13px;color:var(--text-3);}
.footer-col li a:hover{color:var(--brand);}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
.footer-tags a{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-sm);
  border:1px solid var(--line);font-size:12px;color:var(--text-3);
  transition:all .18s var(--ease);
}
.footer-tags a:hover{color:var(--brand);border-color:rgba(31,209,178,.45);}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 28px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .cat-hero__inner{grid-template-columns:1fr 250px;gap:40px;}
  .feat-grid{gap:20px;}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;}
  .footer-col:last-child{grid-column:1 / -1;}
}
@media (max-width:992px){
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .nav,.header-link{display:none;}
  .burger{display:inline-flex;}
  .cat-hero__inner{grid-template-columns:1fr;gap:32px;padding:42px 0 52px;}
  .cat-hero__stat{flex-direction:row;gap:36px;border-left:none;border-top:1px solid var(--line);padding:24px 0 0;}
  .feat-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:1fr;gap:32px;}
  .compare{grid-template-columns:1fr;}
  .compare__divider{height:1px;}
  .cta-band{padding:36px;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  .section--tight{padding:40px 0;}
  h2{font-size:23px;}
  .section-head{margin-bottom:28px;gap:16px;}
  .feat-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-col:last-child{grid-column:auto;}
  .compare__col{padding:24px 20px;}
  .cat-hero__stat{flex-direction:column;gap:16px;}
  .cat-hero__stat-item span:first-child{font-size:26px;}
  .footer-bottom{flex-direction:column;gap:8px;font-size:12px;}
  .cta-band{padding:28px 22px;}
  .cta-band h2{font-size:22px;}
}
@media (max-width:520px){
  .brand__name{font-size:15px;}
  .header-main__inner{gap:12px;height:60px;}
  .header-link{display:none;}
  .btn--sm{padding:0 12px;}
  .cat-hero h1{font-size:26px;}
  .cat-hero__lead{font-size:15px;}
  .feat-card{padding:20px;}
  .scene-card{flex-direction:column;}
  .scene-card__thumb{width:100%;height:150px;}
  .footer-grid{grid-template-columns:1fr;}
  .filter-row{gap:8px;}
  .chip{height:32px;padding:0 12px;font-size:12px;}
  .search-bar form{flex-direction:column;}
  .search-bar input,.search-bar .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
}