/* roulang page: index */
:root{
  --c-primary:#1A5FD0;
  --c-primary-dark:#0F3E96;
  --c-primary-deep:#0F2A5C;
  --c-primary-soft:#EAF1FE;
  --c-primary-hover:#1450B0;
  --c-teal:#12A594;
  --c-teal-soft:#E3F6F3;
  --c-amber:#FF7A2F;
  --c-amber-soft:#FFF1E8;
  --c-ink:#0F1B2D;
  --c-ink-2:#47536B;
  --c-ink-3:#7A8699;
  --c-line:#E4E9F2;
  --c-line-2:#E9EEF7;
  --c-bg:#F6F8FC;
  --c-card:#FFFFFF;
  --c-band:#F4F7FD;
  --c-img-bg:#EEF3FB;
  --c-ok:#12A594;
  --c-warn:#F5A524;
  --c-err:#E5484D;
  --r-card:14px;
  --r-lg:16px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-sm:0 1px 3px rgba(21,58,120,.06);
  --sh-card:0 6px 20px -6px rgba(21,58,120,.10),0 2px 6px rgba(21,58,120,.05);
  --sh-hover:0 16px 36px -12px rgba(21,58,120,.20);
  --sp:8px;
  --font:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei","Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"SFMono-Regular","JetBrains Mono",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--c-ink);
  background:var(--c-bg);
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease-out;}
a:hover{color:var(--c-primary-hover);}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3{font-weight:700;letter-spacing:.01em;color:var(--c-ink);}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--band{background:var(--c-band);}
.section--white{background:#fff;}
.section__head{max-width:760px;margin-bottom:40px;}
.section__head--center{margin-left:auto;margin-right:auto;text-align:center;}
.section__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-primary);
  letter-spacing:.06em;margin-bottom:12px;
}
.section__eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--c-primary);}
.section h2{font-size:clamp(22px,2.2vw,30px);line-height:1.35;margin-bottom:12px;}
.section__desc{font-size:15px;line-height:1.8;color:var(--c-ink-2);max-width:640px;}
.section__head--center .section__desc{margin:0 auto;}

/* ============ 顶部导航 ============ */
.header{
  position:sticky;top:0;z-index:120;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--c-line-2);
  transition:height .2s ease-out,box-shadow .2s ease-out;
  backdrop-filter:saturate(180%) blur(0px);
}
.header__inner{
  display:flex;align-items:center;gap:32px;
  height:68px;transition:height .2s ease-out;
}
.header.is-scrolled{box-shadow:var(--sh-sm);}
.header.is-scrolled .header__inner{height:60px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--c-ink);}
.logo:hover{color:var(--c-ink);}
.logo__mark{
  width:22px;height:22px;border-radius:7px;
  background:linear-gradient(135deg,var(--c-primary) 0%,#3A80E8 100%);
  box-shadow:0 2px 6px rgba(26,95,208,.28);
  position:relative;flex:0 0 auto;
}
.logo__mark::after{
  content:"";position:absolute;inset:7px 6px;
  border-radius:2px;background:#fff;opacity:.92;
}
.logo__text{display:flex;align-items:baseline;gap:3px;}
.logo__main{font-size:21px;font-weight:700;color:var(--c-primary);letter-spacing:.02em;}
.logo__sub{font-size:12px;font-weight:600;color:var(--c-ink-3);letter-spacing:.06em;}
.nav{display:flex;align-items:center;gap:28px;margin-left:8px;}
.nav__item{position:relative;}
.nav__link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:500;color:var(--c-ink-2);
  padding:8px 0;position:relative;
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;
  height:2px;border-radius:2px;background:var(--c-primary);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.nav__link:hover,.nav__link.is-active{color:var(--c-primary);}
.nav__link:hover::after,.nav__link.is-active::after{transform:scaleX(1);}
.nav__caret{
  width:8px;height:8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translate(-1px,-1px);transition:transform .2s ease-out;
}
.nav__item.is-open .nav__caret{transform:rotate(-135deg) translate(-2px,-2px);}
.header__right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-btn);
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);color:var(--c-ink-2);background:#fff;
  transition:all .18s ease-out;
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:#F4F8FF;}
.icon-btn svg{width:18px;height:18px;}
.search-box{
  display:none;align-items:center;gap:8px;
  height:40px;padding:0 8px 0 12px;border:1px solid var(--c-line);
  border-radius:var(--r-btn);background:#fff;width:230px;
}
.search-box.is-open{display:inline-flex;}
.search-box input{border:0;outline:0;background:none;width:100%;font-size:14px;}
.search-box svg{width:16px;height:16px;color:var(--c-ink-3);flex:0 0 auto;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  border-radius:var(--r-btn);border:1px solid transparent;
  padding:0 24px;height:48px;
  transition:transform .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,color .18s ease-out;
  white-space:nowrap;
}
.btn svg{width:18px;height:18px;flex:0 0 auto;}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px -8px rgba(26,95,208,.7);}
.btn--primary:hover{background:var(--c-primary-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-hover);}
.btn--primary:active{transform:translateY(0);box-shadow:none;}
.btn--ghost{background:#fff;border-color:#D6E0F0;color:var(--c-primary);}
.btn--ghost:hover{border-color:var(--c-primary);background:#F4F8FF;color:var(--c-primary);transform:translateY(-1px);}
.btn--soft{background:var(--c-primary-soft);color:var(--c-primary);}
.btn--soft:hover{background:#DDE9FE;color:var(--c-primary-dark);transform:translateY(-1px);}
.btn--white{background:#fff;color:var(--c-primary-dark);}
.btn--white:hover{background:#EAF1FE;color:var(--c-primary-dark);transform:translateY(-1px);}
.btn--outline-white{background:transparent;border-color:rgba(255,255,255,.45);color:#fff;}
.btn--outline-white:hover{border-color:#fff;background:rgba(255,255,255,.12);color:#fff;transform:translateY(-1px);}
.btn--sm{height:36px;padding:0 16px;font-size:14px;border-radius:8px;}
.btn--md{height:40px;padding:0 18px;font-size:14px;}
.btn--disabled,.btn[disabled]{
  background:#EEF1F6;color:#9AA6B8;border-color:#EEF1F6;cursor:not-allowed;
  transform:none;box-shadow:none;
}
.btn--disabled:hover,.btn[disabled]:hover{background:#EEF1F6;color:#9AA6B8;border-color:#EEF1F6;transform:none;box-shadow:none;}

/* ============ Mega 面板 ============ */
.mega{
  position:absolute;top:calc(100% + 14px);left:-24px;
  width:min(920px,calc(100vw - 48px));
  background:#fff;border:1px solid var(--c-line-2);border-radius:var(--r-lg);
  box-shadow:var(--sh-hover);
  padding:28px;
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .18s ease-out,transform .18s ease-out,visibility .18s;
  z-index:130;
}
.nav__item.is-open .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega__top{
  font-size:12px;color:var(--c-ink-3);line-height:1.7;
  padding-bottom:16px;margin-bottom:18px;border-bottom:1px solid var(--c-line-2);
}
.mega__grid{display:grid;grid-template-columns:1.1fr 1fr .9fr;gap:28px;}
.mega__title{font-size:13px;font-weight:600;color:var(--c-ink);margin-bottom:10px;}
.mega__list li a{
  display:flex;align-items:center;justify-content:space-between;
  font-size:14px;color:var(--c-ink-2);padding:9px 10px;border-radius:8px;
  transition:background .16s ease-out,color .16s ease-out;
}
.mega__list li a span{font-size:12px;color:var(--c-ink-3);}
.mega__list li a:hover{background:var(--c-primary-soft);color:var(--c-primary);}
.mega__list li a:hover span{color:var(--c-primary);}
.mega__news li + li{margin-top:12px;}
.mega__news a{display:block;padding:10px 12px;border:1px solid var(--c-line-2);border-radius:10px;transition:all .16s ease-out;}
.mega__news a:hover{border-color:#C9DBF8;background:#F8FAFF;transform:translateY(-2px);}
.mega__news strong{display:block;font-size:14px;font-weight:600;color:var(--c-ink);line-height:1.5;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
.mega__news time{display:block;font-size:12px;color:var(--c-ink-3);margin-top:4px;}
.mega__card{
  display:block;border:1px solid var(--c-line-2);border-radius:12px;overflow:hidden;
  background:#fff;transition:all .18s ease-out;
}
.mega__card:hover{transform:translateY(-3px);box-shadow:var(--sh-card);border-color:#C9DBF8;}
.mega__card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--c-img-bg);}
.mega__card span{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;font-size:14px;font-weight:600;color:var(--c-ink);}
.mega__card span svg{width:16px;height:16px;color:var(--c-primary);}

/* ============ 移动端抽屉 ============ */
.burger{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  align-items:center;justify-content:center;border:1px solid var(--c-line);background:#fff;
}
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--c-ink-2);position:relative;transition:background .18s;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;border-radius:2px;background:var(--c-ink-2);
  transition:transform .2s ease-out;
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.burger.is-active span{background:var(--c-primary);}
.burger.is-active span::before{transform:translateY(6px) rotate(45deg);background:var(--c-primary);}
.burger.is-active span::after{transform:translateY(-6px) rotate(-45deg);background:var(--c-primary);}
.overlay{
  position:fixed;inset:0;background:rgba(15,27,45,.45);
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s;z-index:150;
}
.overlay.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);
  background:#fff;z-index:160;transform:translateX(100%);
  transition:transform .24s ease-out;display:flex;flex-direction:column;
  box-shadow:-12px 0 40px -20px rgba(15,42,92,.4);
}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--c-line-2);}
.drawer__body{flex:1;overflow-y:auto;padding:12px 12px 20px;}
.drawer__link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:44px;padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--c-ink-2);
}
.drawer__link:hover,.drawer__link.is-active{background:var(--c-primary-soft);color:var(--c-primary);}
.drawer__sub{padding:4px 0 8px;}
.drawer__sub a{display:block;font-size:14px;color:var(--c-ink-2);padding:10px 14px 10px 26px;border-radius:10px;}
.drawer__sub a:hover{background:#F4F8FF;color:var(--c-primary);}
.drawer__foot{padding:16px 20px;border-top:1px solid var(--c-line-2);}
.drawer__foot .btn{width:100%;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;background:#fff;
  padding:72px 0 88px;
}
.hero::before{
  content:"";position:absolute;top:-180px;right:-140px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(26,95,208,.08) 0%,rgba(26,95,208,0) 68%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.4;
  background-image:radial-gradient(rgba(26,95,208,.09) 1px,transparent 1px);
  background-size:22px 22px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 62%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 62%);
}
.hero__grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;
}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);padding:6px 14px;margin-bottom:20px;
}
.hero__eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary);}
.hero h1{
  font-size:clamp(30px,4.2vw,46px);line-height:1.22;font-weight:700;margin-bottom:18px;
}
.hero h1 em{font-style:normal;color:var(--c-primary);}
.hero__sub{font-size:16px;line-height:1.75;color:var(--c-ink-2);max-width:520px;margin-bottom:28px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px;}
.hero__trust{
  display:flex;flex-wrap:wrap;align-items:center;gap:0;
  border-top:1px solid var(--c-line-2);padding-top:18px;
}
.hero__trust div{
  padding:0 20px;border-left:1px solid var(--c-line-2);
  font-size:13px;color:var(--c-ink-3);line-height:1.5;
}
.hero__trust div:first-child{padding-left:0;border-left:0;}
.hero__trust strong{display:block;font-size:14px;font-weight:600;color:var(--c-ink);}
.hero__visual{position:relative;}
.hero__shot{
  border-radius:var(--r-lg);overflow:hidden;background:var(--c-img-bg);
  box-shadow:0 24px 60px -28px rgba(15,42,92,.35),0 6px 20px -10px rgba(21,58,120,.14);
  border:1px solid var(--c-line-2);
}
.hero__shot img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.float-card{
  position:absolute;background:#fff;border:1px solid var(--c-line-2);
  border-radius:12px;box-shadow:var(--sh-card);padding:12px 14px;
  display:flex;align-items:center;gap:10px;
}
.float-card--ver{left:-18px;bottom:34px;}
.float-card--rate{right:-14px;top:26px;}
.float-card__icon{
  width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:var(--c-teal-soft);color:var(--c-teal);flex:0 0 auto;
}
.float-card--rate .float-card__icon{background:var(--c-amber-soft);color:var(--c-amber);}
.float-card__icon svg{width:18px;height:18px;}
.float-card__label{font-size:11px;color:var(--c-ink-3);line-height:1.4;}
.float-card__value{font-size:14px;font-weight:600;color:var(--c-ink);line-height:1.4;}
.stars{display:inline-flex;gap:2px;color:var(--c-amber);}
.stars svg{width:12px;height:12px;}

/* ============ 价值带 ============ */
.value-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--c-line-2);border-radius:var(--r-lg);
  box-shadow:var(--sh-card);overflow:hidden;
}
.value-item{padding:32px 28px;border-left:1px solid var(--c-line-2);}
.value-item:first-child{border-left:0;}
.value-item__icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);margin-bottom:16px;
}
.value-item__icon svg{width:22px;height:22px;}
.value-item h3{font-size:17px;line-height:1.5;margin-bottom:8px;}
.value-item p{font-size:14px;line-height:1.75;color:var(--c-ink-2);}

/* ============ 截图轮播 ============ */
.shots__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.shots__arrows{display:flex;gap:10px;flex:0 0 auto;}
.arrow-btn{
  width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--c-line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--c-ink-2);
  transition:all .18s ease-out;
}
.arrow-btn:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff;transform:translateY(-1px);}
.arrow-btn svg{width:18px;height:18px;}
.shots__track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 20px;margin:0 -4px;
  scrollbar-width:none;
}
.shots__track::-webkit-scrollbar{display:none;}
.shot{
  flex:0 0 calc((100% - 48px)/3);scroll-snap-align:start;
}
.shot__frame{
  border-radius:var(--r-lg);overflow:hidden;background:var(--c-img-bg);
  border:1px solid var(--c-line-2);box-shadow:var(--sh-sm);
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.shot:hover .shot__frame{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.shot__frame img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.shot figcaption{font-size:12px;color:var(--c-ink-3);margin-top:12px;text-align:center;}
.shots__dots{display:flex;justify-content:center;gap:8px;margin-top:8px;}
.dot{width:8px;height:8px;border-radius:var(--r-pill);background:#D6E0F0;transition:all .2s ease-out;}
.dot.is-active{width:26px;background:var(--c-primary);}

/* ============ 系统要求 ============ */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.spec-card{
  background:#fff;border:1px solid var(--c-line-2);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);transition:all .2s ease-out;
}
.spec-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#C9DBF8;}
.spec-card__head{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.spec-card__icon{
  width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);flex:0 0 auto;
}
.spec-card__icon svg{width:20px;height:20px;}
.spec-card h3{font-size:17px;font-weight:600;}
.spec-card dl{display:grid;grid-template-columns:auto 1fr;gap:8px 18px;font-size:14px;line-height:1.7;}
.spec-card dt{color:var(--c-ink-3);}
.spec-card dd{margin:0;color:var(--c-ink);}
.mono-note{
  margin-top:24px;display:flex;flex-wrap:wrap;gap:10px 28px;align-items:center;
  background:var(--c-band);border:1px dashed #D6E0F0;border-radius:12px;padding:16px 20px;
  font-family:var(--mono);font-size:12.5px;color:var(--c-ink-2);line-height:1.7;
}
.mono-note span{color:var(--c-ink-3);font-family:var(--font);font-size:12px;}

/* ============ 评价墙 ============ */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.review-col--mid{margin-top:24px;}
.review-card{
  background:#fff;border:1px solid var(--c-line-2);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);margin-bottom:24px;transition:all .2s ease-out;
}
.review-card:last-child{margin-bottom:0;}
.review-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#C9DBF8;}
.review-card p{font-size:15px;line-height:1.8;color:var(--c-ink-2);margin:12px 0 16px;}
.review-card__meta{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--c-ink-3);}
.review-card__user{font-size:14px;font-weight:600;color:var(--c-ink);}

/* ============ 下载矩阵 ============ */
.download-band{
  background:linear-gradient(180deg,#F2F6FE 0%,#EAF1FE 100%);
  border-top:1px solid #DCE7FA;border-bottom:1px solid #DCE7FA;
}
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.dl-btn{
  display:flex;align-items:center;gap:14px;
  height:56px;padding:0 18px;border-radius:12px;background:#fff;
  border:1px solid #D6E0F0;text-align:left;
  transition:all .18s ease-out;
}
.dl-btn:hover{border-color:var(--c-primary);background:#fff;transform:translateY(-1px);box-shadow:var(--sh-hover);}
.dl-btn__icon{
  width:32px;height:32px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);flex:0 0 auto;
}
.dl-btn__icon svg{width:18px;height:18px;}
.dl-btn__text{display:flex;flex-direction:column;}
.dl-btn__text strong{font-size:15px;font-weight:600;color:var(--c-ink);line-height:1.4;}
.dl-btn__text em{font-style:normal;font-size:12px;color:var(--c-ink-3);line-height:1.4;}
.dl-aside{
  margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;gap:24px;
  background:#fff;border:1px solid #D6E0F0;border-radius:var(--r-lg);padding:24px;
}
.qr-card{
  width:112px;height:112px;border-radius:12px;background:var(--c-img-bg);
  border:1px solid var(--c-line);display:flex;align-items:center;justify-content:center;
  overflow:hidden;flex:0 0 auto;
}
.qr-card img{width:100%;height:100%;object-fit:cover;}
.dl-aside__text h3{font-size:17px;margin-bottom:6px;}
.dl-aside__text p{font-size:14px;color:var(--c-ink-2);max-width:520px;}
.safe-line{
  display:flex;align-items:center;gap:8px;font-size:12px;color:var(--c-ink-3);
  margin-top:20px;justify-content:center;
}
.safe-line svg{width:14px;height:14px;color:var(--c-teal);}

/* ============ 内容列表（CMS） ============ */
.posts__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.text-link{
  font-size:14px;font-weight:600;color:var(--c-primary);
  border-bottom:1px dashed rgba(26,95,208,.4);padding-bottom:2px;
}
.text-link:hover{border-bottom-style:solid;}
.posts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  background:#fff;border:1px solid var(--c-line-2);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-sm);display:flex;flex-direction:column;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#C9DBF8;}
.post-card__cover{display:block;background:var(--c-img-bg);}
.post-card__cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.post-card__body{padding:20px;display:flex;flex-direction:column;flex:1;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;line-height:1;
  padding:5px 10px;border-radius:var(--r-pill);
}
.badge--cat{background:var(--c-primary-soft);color:var(--c-primary);}
.badge--ver{background:var(--c-teal-soft);color:var(--c-teal);}
.badge--new{background:var(--c-amber-soft);color:var(--c-amber);}
.post-card h3{
  font-size:17px;font-weight:600;line-height:1.5;margin:12px 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card h3 a{color:var(--c-ink);}
.post-card h3 a:hover{color:var(--c-primary);}
.post-card__excerpt{
  font-size:14px;line-height:1.75;color:var(--c-ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:18px;
}
.post-card__foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:12px;color:var(--c-ink-3);border-top:1px solid var(--c-line-2);padding-top:14px;
}
.post-card__foot .go{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600;}
.post-card__foot .go svg{width:14px;height:14px;}
.post-card--wide{grid-column:1 / -1;flex-direction:row;}
.post-card--wide .post-card__cover{flex:0 0 46%;}
.post-card--wide .post-card__cover img{height:100%;aspect-ratio:auto;min-height:260px;}
.post-card--wide .post-card__body{padding:28px 30px;}
.post-card--wide h3{font-size:20px;margin-top:14px;}
.post-card--wide .post-card__excerpt{-webkit-line-clamp:3;font-size:15px;}
.empty-state{
  grid-column:1 / -1;
  min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  border:1px dashed #D6E0F0;border-radius:var(--r-card);background:#fff;text-align:center;padding:32px;
}
.empty-state svg{width:32px;height:32px;color:var(--c-ink-3);}
.empty-state p{font-size:14px;color:var(--c-ink-3);}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq{background:#fff;border:1px solid var(--c-line-2);border-radius:var(--r-card);box-shadow:var(--sh-sm);overflow:hidden;}
.faq__item + .faq__item{border-top:1px solid var(--c-line-2);}
.faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 24px;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-ink);transition:background .18s ease-out;
}
.faq__q:hover{background:#F8FAFF;}
.faq__mark{
  width:20px;height:20px;position:relative;flex:0 0 auto;color:var(--c-primary);
  transition:transform .2s ease-out;
}
.faq__mark::before,.faq__mark::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq__mark::before{left:0;right:0;top:9px;height:2px;}
.faq__mark::after{top:0;bottom:0;left:9px;width:2px;}
.faq__item.is-open .faq__mark{transform:rotate(45deg);}
.faq__a{display:none;padding:0 24px 20px;background:#F8FAFF;font-size:15px;line-height:1.8;color:var(--c-ink-2);}
.faq__item.is-open .faq__a{display:block;padding-top:14px;}

/* ============ 底部 CTA ============ */
.cta-band{background:var(--c-primary-deep);color:#fff;}
.cta-band__inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:56px 0;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.2vw,28px);margin-bottom:8px;}
.cta-band p{font-size:15px;color:#C7D6EE;max-width:560px;}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;}

/* ============ 页脚 ============ */
.footer{background:var(--c-primary-deep);color:#C7D6EE;padding-top:64px;}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer__brand .logo__main{color:#fff;}
.footer__brand .logo__sub{color:#8FA9D6;}
.footer p{font-size:14px;line-height:1.8;color:#A9C0E4;max-width:320px;}
.footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer li + li{margin-top:10px;}
.footer a{font-size:14px;color:#C7D6EE;}
.footer a:hover{color:#fff;text-decoration:underline;}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:#8FA9D6;
}
.footer__bottom a{font-size:13px;color:#8FA9D6;}
.footer__bottom a:hover{color:#fff;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .hero__grid{gap:40px;}
  .mega{left:auto;right:0;}
}
@media (max-width:1023px){
  .nav,.header__right .btn{display:none;}
  .burger{display:inline-flex;}
  .section{padding:72px 0;}
  .hero{padding:56px 0 64px;}
  .hero__grid{grid-template-columns:1fr;gap:40px;}
  .hero__visual{order:2;}
  .hero__content{order:1;}
  .hero__actions{order:1;}
  .value-band{grid-template-columns:repeat(2,1fr);}
  .value-item:nth-child(3){border-left:0;}
  .value-item:nth-child(n+3){border-top:1px solid var(--c-line-2);}
  .shots__track{gap:20px;}
  .shot{flex:0 0 calc((100% - 20px)/2);}
  .shots__arrows{display:none;}
  .posts-grid{grid-template-columns:repeat(2,1fr);}
  .post-card--wide{flex-direction:column;}
  .post-card--wide .post-card__cover{flex:none;}
  .post-card--wide .post-card__cover img{aspect-ratio:16/9;min-height:0;}
  .review-grid{grid-template-columns:repeat(3,1fr);}
  .dl-grid{grid-template-columns:repeat(2,1fr);}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .hero{padding:40px 0 56px;}
  .hero h1{font-size:30px;}
  .hero__actions .btn{width:100%;}
  .hero__trust div{flex:1 1 100%;border-left:0;padding:10px 0;border-top:1px solid var(--c-line-2);}
  .hero__trust div:first-child{border-top:0;padding-top:0;}
  .float-card--ver{left:8px;bottom:12px;}
  .float-card--rate{right:8px;top:12px;}
  .value-band{grid-template-columns:1fr;}
  .value-item{border-left:0;border-top:1px solid var(--c-line-2);padding:24px 20px;}
  .value-item:first-child{border-top:0;}
  .spec-grid{grid-template-columns:1fr;}
  .shots__track{gap:16px;}
  .shot{flex:0 0 86%;}
  .review-grid{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:16px;padding-bottom:12px;}
  .review-card{min-width:80%;scroll-snap-align:start;}
  .review-col--mid{margin-top:0;}
  .review-col{display:contents;}
  .posts-grid{grid-template-columns:1fr;}
  .post-card--wide .post-card__body{padding:20px;}
  .dl-grid{grid-template-columns:1fr;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;padding:48px 0;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{width:100%;}
  .footer__grid{grid-template-columns:1fr;gap:28px;}
  .posts__head,.shots__head{flex-direction:column;align-items:flex-start;}
  .dl-aside{padding:20px;}
  .faq__q{padding:14px 18px;font-size:15px;}
  .faq__a{padding-left:18px;padding-right:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: article */
:root{
  --c-primary:#1A5FD0;
  --c-primary-dark:#0F3E96;
  --c-primary-hover:#1450B0;
  --c-primary-soft:#EAF1FE;
  --c-teal:#12A594;
  --c-teal-soft:#E3F6F3;
  --c-amber:#FF7A2F;
  --c-amber-soft:#FFF1E8;
  --c-warning:#F5A524;
  --c-danger:#E5484D;
  --c-text:#0F1B2D;
  --c-text-2:#47536B;
  --c-text-3:#7A8699;
  --c-border:#E4E9F2;
  --c-border-soft:#E9EEF7;
  --c-bg:#F6F8FC;
  --c-card:#FFFFFF;
  --c-band:#F4F7FD;
  --c-footer:#0F2A5C;
  --radius-sm:8px;
  --radius:10px;
  --radius-card:14px;
  --radius-lg:16px;
  --shadow-sm:0 1px 3px rgba(21,58,120,.06);
  --shadow-card:0 6px 20px -6px rgba(21,58,120,.10),0 2px 6px rgba(21,58,120,.05);
  --shadow-hover:0 16px 36px -12px rgba(21,58,120,.20);
  --container:1240px;
  --font:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--c-text);
  background:var(--c-bg);
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
svg{display:block;}
::selection{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 20px;border-radius:var(--radius);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out;
}
.btn--lg{height:50px;padding:0 24px;}
.btn--sm{height:32px;padding:0 14px;font-size:13px;}
.btn--primary{background:var(--c-primary);color:#fff;}
.btn--primary:hover{background:var(--c-primary-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-card);}
.btn--primary:active{transform:translateY(0);box-shadow:none;}
.btn--ghost{background:#fff;color:var(--c-primary);border-color:#D6E0F0;}
.btn--ghost:hover{border-color:var(--c-primary);background:#F4F8FF;transform:translateY(-1px);}
.btn--light{background:#fff;color:var(--c-primary-dark);}
.btn--light:hover{background:#F4F8FF;transform:translateY(-1px);}
.btn--outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);}
.btn--outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-1px);}
.btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.btn[disabled],.btn.is-disabled{background:#EEF1F6;color:#9AA6B8;border-color:transparent;cursor:not-allowed;box-shadow:none;transform:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.5;}
.badge--cat{background:var(--c-primary-soft);color:var(--c-primary);}
.badge--ver{background:var(--c-teal-soft);color:var(--c-teal);}
.badge--new{background:var(--c-amber-soft);color:var(--c-amber);}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;
  font-size:13px;color:var(--c-text-2);background:#fff;border:1px solid var(--c-border-soft);
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.tag:hover{color:var(--c-primary);border-color:var(--c-primary);background:var(--c-primary-soft);}

/* ---------- 头部导航 ---------- */
.header{
  position:sticky;top:0;z-index:120;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--c-border-soft);
  transition:box-shadow .2s ease-out;
}
.header.is-scrolled{box-shadow:var(--shadow-sm);}
.header__inner{position:relative;display:flex;align-items:center;gap:36px;height:68px;transition:height .2s ease-out;}
.header.is-scrolled .header__inner{height:60px;}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;}
.logo__mark{position:relative;width:28px;height:28px;border-radius:9px;background:var(--c-primary);flex:0 0 auto;}
.logo__mark::after{content:"";position:absolute;left:50%;top:50%;width:11px;height:11px;border-radius:4px;background:#fff;transform:translate(-50%,-50%);}
.logo__text{display:flex;flex-direction:column;line-height:1.1;}
.logo__main{font-size:21px;font-weight:700;color:var(--c-primary);letter-spacing:.02em;}
.logo__sub{font-size:11px;color:var(--c-text-3);letter-spacing:.06em;}
.nav{display:flex;align-items:center;gap:28px;margin-left:12px;}
.nav__item{position:static;}
.nav__link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:500;color:var(--c-text-2);padding:8px 0;
  transition:color .18s ease-out;
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
}
.nav__link:hover,.nav__link.is-active{color:var(--c-primary);}
.nav__link:hover::after,.nav__link.is-active::after{transform:scaleX(1);}
.nav__caret{width:6px;height:6px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .2s ease-out;}
.nav__item.is-open .nav__caret{transform:rotate(-135deg) translateY(-2px);}
.header__actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius);
  border:1px solid var(--c-border);background:#fff;color:var(--c-text-2);cursor:pointer;
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
}
.icon-btn:hover{color:var(--c-primary);border-color:var(--c-primary);background:#F4F8FF;}
.icon-btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}

/* Mega 面板 */
.mega{
  position:absolute;left:50%;top:100%;width:min(920px,calc(100% - 32px));
  transform:translate(-50%,-8px);opacity:0;visibility:hidden;pointer-events:none;
  background:#fff;border:1px solid var(--c-border-soft);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hover);padding:28px;z-index:130;
  transition:opacity .18s ease-out,transform .18s ease-out,visibility .18s;
}
.nav__item.is-open .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,6px);}
.mega__top{font-size:12px;line-height:1.7;color:var(--c-text-3);padding-bottom:16px;border-bottom:1px solid var(--c-border-soft);}
.mega__grid{display:grid;grid-template-columns:1.2fr 1.1fr .9fr;gap:28px;padding-top:20px;}
.mega__title{font-size:14px;font-weight:600;color:var(--c-text);margin-bottom:12px;}
.mega__list li a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  height:40px;padding:0 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--c-text-2);
  transition:background-color .18s ease-out,color .18s ease-out;
}
.mega__list li a span{font-size:12px;color:var(--c-text-3);}
.mega__list li a:hover{background:var(--c-primary-soft);color:var(--c-primary);}
.mega__list li a:hover span{color:var(--c-primary);}
.mega__news li+li{margin-top:10px;}
.mega__news a{display:block;padding:10px 12px;border-radius:var(--radius-sm);transition:background-color .18s ease-out;}
.mega__news a:hover{background:var(--c-band);}
.mega__news strong{display:block;font-size:14px;font-weight:500;color:var(--c-text);line-height:1.6;}
.mega__news a:hover strong{color:var(--c-primary);}
.mega__news time{display:block;margin-top:4px;font-size:12px;color:var(--c-text-3);}
.mega__card{
  display:block;border:1px solid var(--c-border-soft);border-radius:var(--radius-card);
  overflow:hidden;background:#fff;transition:border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.mega__card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EEF3FB;}
.mega__card span{display:block;padding:12px 14px;font-size:14px;font-weight:600;color:var(--c-text);}
.mega__card:hover{border-color:var(--c-primary);box-shadow:var(--shadow-card);transform:translateY(-2px);}
.mega__card:hover span{color:var(--c-primary);}

/* 移动端抽屉 */
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--c-border);border-radius:var(--radius);background:#fff;cursor:pointer;position:relative;}
.nav-toggle span{position:absolute;left:50%;width:20px;height:2px;border-radius:2px;background:var(--c-text);transform:translateX(-50%);transition:background-color .18s ease-out,opacity .18s ease-out,transform .18s ease-out;}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
.nav-toggle.is-active span{background:var(--c-primary);}
.nav-toggle.is-active span:nth-child(1){top:21px;transform:translateX(-50%) rotate(45deg);}
.nav-toggle.is-active span:nth-child(2){opacity:0;}
.nav-toggle.is-active span:nth-child(3){top:21px;transform:translateX(-50%) rotate(-45deg);}
.nav-mask{position:fixed;inset:0;background:rgba(15,27,45,.45);opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s;z-index:190;}
.nav-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);background:#fff;z-index:200;
  transform:translateX(100%);transition:transform .28s ease-out;
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;box-shadow:var(--shadow-hover);
}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--c-border-soft);}
.drawer__close{width:36px;height:36px;border-radius:var(--radius-sm);border:1px solid var(--c-border);background:#fff;color:var(--c-text-2);font-size:18px;line-height:1;cursor:pointer;}
.drawer__close:hover{color:var(--c-primary);border-color:var(--c-primary);}
.drawer__nav{display:flex;flex-direction:column;padding:12px 0;flex:1;}
.drawer__link{display:flex;align-items:center;min-height:44px;font-size:15px;font-weight:500;color:var(--c-text);border-bottom:1px solid var(--c-border-soft);}
.drawer__link:hover,.drawer__link.is-active{color:var(--c-primary);}
.drawer__group{border-bottom:1px solid var(--c-border-soft);}
.drawer__sub-toggle{
  display:flex;align-items:center;justify-content:space-between;width:100%;min-height:44px;
  background:none;border:0;padding:0;font-size:15px;font-weight:500;color:var(--c-text);cursor:pointer;text-align:left;
}
.drawer__sub-toggle .chev{width:7px;height:7px;border-right:1.6px solid var(--c-text-3);border-bottom:1.6px solid var(--c-text-3);transform:rotate(45deg);transition:transform .2s ease-out;}
.drawer__group.is-open .drawer__sub-toggle .chev{transform:rotate(-135deg);}
.drawer__group.is-open .drawer__sub-toggle{color:var(--c-primary);}
.drawer__sub{max-height:0;overflow:hidden;transition:max-height .24s ease-out;}
.drawer__group.is-open .drawer__sub{max-height:320px;}
.drawer__sub a{display:flex;align-items:center;min-height:40px;padding-left:14px;font-size:14px;color:var(--c-text-2);border-radius:var(--radius-sm);}
.drawer__sub a:hover{background:var(--c-primary-soft);color:var(--c-primary);}
.drawer__cta{margin-top:16px;width:100%;}

/* ---------- 面包屑 ---------- */
.crumb-band{background:var(--c-band);border-bottom:1px solid var(--c-border-soft);}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:16px 0;font-size:13px;color:var(--c-text-3);}
.crumb a{color:var(--c-text-2);transition:color .18s ease-out;}
.crumb a:hover{color:var(--c-primary);}
.crumb__sep{color:#C3CDDE;}
.crumb__current{color:var(--c-text-3);}

/* ---------- 文章头部 ---------- */
.article-head{padding:40px 0 8px;}
.article-head__cat{margin-bottom:14px;}
.article-title{
  font-size:clamp(28px,3.4vw,34px);line-height:1.35;font-weight:700;color:var(--c-text);
  max-width:860px;letter-spacing:.01em;
}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:16px;font-size:13px;color:var(--c-text-3);}
.article-meta__item{display:inline-flex;align-items:center;gap:6px;}
.article-meta__item svg{width:14px;height:14px;stroke:var(--c-text-3);}
.article-meta__sep{color:#C3CDDE;}
.article-meta a{color:var(--c-text-2);}
.article-meta a:hover{color:var(--c-primary);}

/* ---------- 布局 ---------- */
.article-main{padding:32px 0 96px;}
.article-layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:40px;align-items:start;}
.article-col{min-width:0;}
.reading-card{
  background:#fff;border:1px solid var(--c-border-soft);border-radius:var(--radius-card);
  padding:32px 36px;box-shadow:var(--shadow-sm);
}

/* ---------- 正文排版 ---------- */
.article-body{font-size:17px;line-height:1.9;color:var(--c-text);overflow-wrap:break-word;}
.article-body>*:first-child{margin-top:0;}
.article-body h2{
  font-size:24px;line-height:1.4;font-weight:600;color:var(--c-text);
  margin:40px 0 12px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:3px;background:var(--c-primary);
}
.article-body h3{font-size:19px;line-height:1.5;font-weight:600;color:var(--c-text);margin:28px 0 8px;}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 6px;}
.article-body p{margin:0 0 1em;}
.article-body a{color:var(--c-primary);border-bottom:1px dashed rgba(26,95,208,.35);padding-bottom:1px;transition:border-color .18s ease-out,color .18s ease-out;}
.article-body a:hover{color:var(--c-primary-hover);border-bottom-style:solid;border-bottom-color:var(--c-primary);}
.article-body strong{font-weight:600;color:var(--c-text);}
.article-body ul{margin:0 0 1em;}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:8px;}
.article-body ul li::before{content:"";position:absolute;left:4px;top:12px;width:7px;height:7px;border-radius:2px;background:var(--c-primary);}
.article-body ol{counter-reset:ol-item;margin:0 0 1em;}
.article-body ol li{position:relative;counter-increment:ol-item;padding-left:32px;margin-bottom:10px;}
.article-body ol li::before{
  content:counter(ol-item);position:absolute;left:0;top:6px;width:22px;height:22px;border-radius:50%;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;line-height:1;
}
.article-body blockquote{
  margin:20px 0;padding:16px 20px;border-left:3px solid var(--c-primary);
  background:#F8FAFF;border-radius:0 var(--radius) var(--radius) 0;color:var(--c-text-2);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body code{
  font-family:var(--mono);font-size:14px;background:var(--c-band);color:var(--c-primary-dark);
  padding:2px 6px;border-radius:6px;
}
.article-body pre{
  font-family:var(--mono);font-size:14px;line-height:1.7;background:var(--c-band);
  border:1px solid var(--c-border-soft);border-radius:var(--radius);padding:16px 18px;
  overflow-x:auto;margin:18px 0;color:var(--c-text-2);
}
.article-body pre code{background:none;padding:0;color:inherit;}
.article-body img{border-radius:12px;margin:20px auto;max-width:100%;height:auto;background:#EEF3FB;}
.article-body figure{margin:20px 0;}
.article-body figcaption{font-size:13px;color:var(--c-text-3);text-align:center;margin-top:8px;}
.article-body table{
  width:100%;border:1px solid var(--c-border);border-radius:12px;border-collapse:separate;
  border-spacing:0;overflow:hidden;margin:18px 0;font-size:15px;
}
.article-body thead th{background:var(--c-primary-soft);color:var(--c-primary-dark);font-weight:600;text-align:left;}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--c-border-soft);}
.article-body tbody tr:nth-child(even){background:#FAFCFE;}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body hr{border:0;border-top:1px solid var(--c-border-soft);margin:32px 0;}

/* 空态 */
.empty-box{
  border:1px dashed #D6E0F0;border-radius:var(--radius-card);background:#FCFDFF;
  padding:48px 24px;text-align:center;
}
.empty-box svg{width:44px;height:44px;margin:0 auto 16px;stroke:#B6C4DB;}
.empty-box__title{font-size:17px;font-weight:600;color:var(--c-text);}
.empty-box__desc{font-size:14px;color:var(--c-text-3);margin:8px 0 20px;}

/* ---------- 标签行 / 返回 ---------- */
.article-foot{margin-top:36px;padding-top:24px;border-top:1px solid var(--c-border-soft);}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}
.article-foot__bar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:22px;flex-wrap:wrap;}
.article-foot__hint{font-size:13px;color:var(--c-text-3);}

/* ---------- 相关推荐 ---------- */
.related{margin-top:44px;}
.related__head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px;}
.related__head h2{font-size:22px;font-weight:600;color:var(--c-text);}
.related__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-border-soft);
  border-radius:var(--radius-card);overflow:hidden;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#CBDDF8;}
.post-card__cover{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EEF3FB;border-radius:0;}
.post-card__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-card__title{
  font-size:17px;line-height:1.5;font-weight:600;color:var(--c-text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card:hover .post-card__title{color:var(--c-primary);}
.post-card__excerpt{
  font-size:14px;line-height:1.7;color:var(--c-text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card__meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;font-size:12px;color:var(--c-text-3);}
.post-card__meta svg{width:13px;height:13px;stroke:var(--c-text-3);}

/* ---------- 侧栏 ---------- */
.sidebar{position:sticky;top:88px;display:flex;flex-direction:column;gap:24px;}
.side-card{background:#fff;border:1px solid var(--c-border-soft);border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-sm);}
.side-card__title{font-size:15px;font-weight:600;color:var(--c-text);margin-bottom:16px;display:flex;align-items:center;gap:8px;}
.side-card__title::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--c-primary);}
.side-download{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:var(--shadow-card);}
.side-download h3{font-size:19px;font-weight:600;line-height:1.4;margin:14px 0 10px;color:#fff;}
.side-download p{font-size:13px;line-height:1.75;color:rgba(255,255,255,.82);margin-bottom:18px;}
.side-download .badge{background:rgba(255,255,255,.18);color:#fff;}
.side-download .btn{width:100%;}
.side-list li{display:flex;align-items:flex-start;gap:12px;padding:12px 0;border-bottom:1px solid var(--c-border-soft);}
.side-list li:last-child{border-bottom:0;padding-bottom:0;}
.side-list li:first-child{padding-top:0;}
.side-list__num{flex:0 0 auto;width:22px;font-size:15px;font-weight:700;color:var(--c-primary);line-height:1.6;}
.side-list__link{font-size:14px;line-height:1.6;color:var(--c-text-2);transition:color .18s ease-out;}
.side-list__link:hover{color:var(--c-primary);}
.side-tags{display:flex;flex-wrap:wrap;gap:8px;}

/* ---------- 底部 CTA ---------- */
.cta-band{background:var(--c-primary-dark);color:#fff;}
.cta-band__inner{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:56px 0;}
.cta-band h2{font-size:clamp(22px,2.6vw,28px);font-weight:600;line-height:1.4;}
.cta-band p{font-size:14px;color:rgba(255,255,255,.78);margin-top:10px;max-width:560px;}
.cta-band__actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto;}

/* ---------- 页脚 ---------- */
.footer{background:var(--c-footer);color:#C7D6EE;margin-top:0;}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:64px 0 40px;}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer__brand .logo__main{color:#fff;}
.footer__brand .logo__sub{color:rgba(255,255,255,.6);}
.footer p{font-size:14px;line-height:1.8;color:rgba(199,214,238,.82);max-width:320px;}
.footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer ul li+li{margin-top:10px;}
.footer ul a{font-size:14px;color:#C7D6EE;transition:color .18s ease-out;}
.footer ul a:hover{color:#fff;text-decoration:underline;}
.footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(199,214,238,.75);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 320px;gap:32px;}
}
@media (max-width:1023px){
  .nav,.header__actions .btn{display:none;}
  .nav-toggle{display:block;}
  .mega{display:none;}
  .article-layout{grid-template-columns:minmax(0,1fr);}
  .sidebar{position:static;order:2;}
  .reading-card{padding:26px 24px;}
  .related__grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;padding:48px 0;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .header__inner{height:64px;gap:16px;}
  .header.is-scrolled .header__inner{height:58px;}
  .logo__main{font-size:19px;}
  .article-head{padding:28px 0 4px;}
  .article-title{font-size:26px;}
  .article-main{padding:24px 0 64px;}
  .reading-card{padding:22px 18px;}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:21px;margin:32px 0 10px;}
  .article-body h3{font-size:18px;margin:24px 0 8px;}
  .article-body blockquote{padding:14px 16px;}
  .related__grid{grid-template-columns:minmax(0,1fr);}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{width:100%;}
  .footer__grid{grid-template-columns:1fr;gap:28px;}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:479px){
  .article-title{font-size:23px;}
  .reading-card{padding:18px 14px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category1 */
:root{
  --c-primary:#1A5FD0;
  --c-primary-dark:#0F3E96;
  --c-primary-hover:#1450B0;
  --c-primary-soft:#EAF1FE;
  --c-primary-ring:rgba(26,95,208,.12);
  --c-teal:#12A594;
  --c-teal-soft:#E3F6F3;
  --c-amber:#FF7A2F;
  --c-amber-soft:#FFF1E8;
  --c-text:#0F1B2D;
  --c-text-2:#47536B;
  --c-text-3:#7A8699;
  --c-border:#E4E9F2;
  --c-border-2:#E9EEF7;
  --c-border-3:#D6E0F0;
  --c-page:#F6F8FC;
  --c-card:#FFFFFF;
  --c-band:#F4F7FD;
  --c-chip:#F2F6FE;
  --c-footer:#0F2A5C;
  --c-footer-text:#C7D6EE;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:16px;
  --r-pill:999px;
  --sh-sm:0 1px 3px rgba(21,58,120,.06);
  --sh-card:0 6px 20px -6px rgba(21,58,120,.10), 0 2px 6px rgba(21,58,120,.05);
  --sh-hover:0 16px 36px -12px rgba(21,58,120,.20);
  --font:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei","Inter",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--c-text);
  background:var(--c-page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,dl,dd,dt,figure{margin:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--c-border-2);
  transition:height .2s ease-out,box-shadow .2s ease-out;
}
.header.is-scrolled{box-shadow:var(--sh-sm);border-bottom-color:transparent}
.header__inner{
  position:relative;
  display:flex;align-items:center;gap:24px;
  height:68px;
  transition:height .2s ease-out;
}
.header.is-scrolled .header__inner{height:60px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo__mark{
  width:26px;height:26px;border-radius:8px;flex-shrink:0;
  background:linear-gradient(135deg,var(--c-primary),#2E7BE6);
  position:relative;
}
.logo__mark::after{
  content:"";position:absolute;inset:8px 7px;border-radius:2px;
  background:#fff;opacity:.92;
}
.logo__text{display:flex;flex-direction:column;line-height:1.15}
.logo__main{font-size:20px;font-weight:700;color:var(--c-primary);letter-spacing:.02em}
.logo__sub{font-size:11px;color:var(--c-text-3);letter-spacing:.06em}
.nav{display:flex;align-items:center;gap:28px;margin-left:12px}
.nav__item{position:static}
.nav__link{
  position:relative;
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:500;color:var(--c-text-2);
  padding:8px 0;
  transition:color .18s ease-out;
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);
  transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
}
.nav__link:hover{color:var(--c-primary)}
.nav__link:hover::after,.nav__link.is-active::after,.nav__item.is-open .nav__link::after{transform:scaleX(1)}
.nav__link.is-active{color:var(--c-primary);font-weight:600}
.nav__caret{
  width:7px;height:7px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-2px);
  transition:transform .18s ease-out;
}
.nav__item.is-open .nav__caret{transform:rotate(225deg) translateY(-1px)}
.header__actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-md);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--c-text-2);border:1px solid transparent;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.icon-btn:hover{background:var(--c-primary-soft);color:var(--c-primary)}
.icon-btn svg{width:19px;height:19px}
.burger{
  display:none;width:44px;height:44px;border-radius:var(--r-md);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--c-text);transition:background .18s ease-out,transform .2s ease-out}
.burger:hover span{background:var(--c-primary)}
.search-bar{
  display:none;
  border-top:1px solid var(--c-border-2);
  background:#fff;
  padding:14px 0;
}
.search-bar.is-open{display:block;animation:fadeIn .18s ease-out}
.search-bar form{display:flex;gap:10px;align-items:center;max-width:640px}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- mega ---------- */
.mega{
  position:absolute;top:calc(100% + 14px);right:0;
  width:min(920px,calc(100vw - 48px));
  background:#fff;border:1px solid var(--c-border-2);border-radius:var(--r-xl);
  box-shadow:var(--sh-hover);
  padding:28px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s ease-out,transform .18s ease-out,visibility .18s;
  z-index:70;
}
.nav__item.is-open .mega{opacity:1;visibility:visible;transform:none}
.mega__top{
  font-size:12px;color:var(--c-text-3);line-height:1.6;
  padding-bottom:16px;margin-bottom:18px;border-bottom:1px solid var(--c-border-2);
}
.mega__grid{display:grid;grid-template-columns:1.1fr 1.2fr .9fr;gap:24px}
.mega__title{font-size:13px;font-weight:600;color:var(--c-text);margin-bottom:12px}
.mega__list li a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:9px 12px;border-radius:var(--r-sm);
  font-size:14px;color:var(--c-text-2);
  transition:background .16s ease-out,color .16s ease-out;
}
.mega__list li a span{font-size:12px;color:var(--c-text-3)}
.mega__list li a:hover{background:var(--c-primary-soft);color:var(--c-primary)}
.mega__list li a:hover span{color:var(--c-primary)}
.mega__news li+li{margin-top:6px}
.mega__news a{
  display:block;padding:10px 12px;border-radius:var(--r-sm);
  transition:background .16s ease-out;
}
.mega__news a:hover{background:var(--c-band)}
.mega__news strong{
  display:block;font-size:14px;font-weight:500;color:var(--c-text-2);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.mega__news time{display:block;font-size:12px;color:var(--c-text-3);margin-top:4px}
.mega__card{
  display:block;border:1px solid var(--c-border-2);border-radius:var(--r-lg);
  overflow:hidden;background:var(--c-card);box-shadow:var(--sh-sm);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.mega__card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#CFE0F8}
.mega__card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EEF3FB}
.mega__card-body{padding:14px}
.mega__card-body strong{display:block;font-size:15px;font-weight:600;color:var(--c-text)}
.mega__card-body span{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--c-primary);margin-top:6px}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(15,27,45,.45);
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s;z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);
  background:#fff;z-index:90;
  transform:translateX(100%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;
  box-shadow:-12px 0 32px rgba(15,27,45,.14);
}
.drawer.is-open{transform:none}
.drawer__head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--c-border-2)}
.drawer__body{flex:1;overflow-y:auto;padding:12px 12px 24px}
.drawer__link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:44px;padding:0 12px;border-radius:var(--r-sm);
  font-size:15px;font-weight:500;color:var(--c-text-2);
}
.drawer__link.is-active{color:var(--c-primary);background:var(--c-primary-soft)}
.drawer__sub{padding:4px 0 8px}
.drawer__sub a{display:block;min-height:40px;line-height:40px;padding:0 24px;border-radius:var(--r-sm);font-size:14px;color:var(--c-text-2)}
.drawer__sub a:hover{background:var(--c-band);color:var(--c-primary)}
.drawer__foot{padding:16px 20px;border-top:1px solid var(--c-border-2)}
.drawer__foot .btn{width:100%}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border-radius:var(--r-md);border:1px solid transparent;
  padding:0 24px;height:48px;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.btn svg{width:19px;height:19px;flex-shrink:0}
.btn--lg{height:52px}
.btn--md{height:40px;padding:0 18px;font-size:14px}
.btn--sm{height:32px;padding:0 14px;font-size:13px;border-radius:var(--r-sm)}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-sm)}
.btn--primary:hover{background:var(--c-primary-hover);transform:translateY(-1px);box-shadow:var(--sh-card)}
.btn--primary:active{transform:none;background:var(--c-primary-dark)}
.btn--ghost{background:#fff;color:var(--c-primary);border-color:var(--c-border-3)}
.btn--ghost:hover{border-color:var(--c-primary);background:#F4F8FF;transform:translateY(-1px)}
.btn--ghost:active{transform:none}
.btn--text{
  height:auto;padding:0;color:var(--c-primary);font-weight:600;
  border-bottom:1px dashed rgba(26,95,208,.45);border-radius:0;
}
.btn--text:hover{border-bottom-style:solid;transform:translateY(-1px)}
.btn[disabled],.btn.is-disabled{
  background:#EEF1F6;color:#9AA6B8;border-color:transparent;cursor:not-allowed;box-shadow:none;transform:none;
}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:5px;
  padding:4px 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;line-height:1.4;white-space:nowrap;
}
.badge--cat{background:var(--c-primary-soft);color:var(--c-primary)}
.badge--ver{background:var(--c-teal-soft);color:var(--c-teal)}
.badge--new{background:var(--c-amber-soft);color:var(--c-amber)}
.badge--tag{background:var(--c-band);color:var(--c-text-2)}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:#fff;
  border-bottom:1px solid var(--c-border-2);
  padding:40px 0 56px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center right;
  opacity:.10;pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;top:-140px;right:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(26,95,208,.08),rgba(26,95,208,0) 70%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb a{color:var(--c-text-2);transition:color .16s ease-out}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb__sep{color:#C3CEE0}
.breadcrumb__current{color:var(--c-text-3)}
.page-hero__grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:40px;align-items:end}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;color:var(--c-primary);letter-spacing:.08em;
  margin-bottom:14px;
}
.eyebrow__dot{width:7px;height:7px;border-radius:50%;background:var(--c-primary)}
.page-hero h1{
  font-size:clamp(30px,3.6vw,38px);line-height:1.28;font-weight:700;letter-spacing:.01em;
  max-width:760px;
}
.page-hero__desc{font-size:16px;color:var(--c-text-2);margin-top:14px;max-width:640px}
.page-hero__facts{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:20px}
.page-hero__facts li{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-2)}
.page-hero__facts b{color:var(--c-text);font-weight:600}
.page-hero__side{display:flex;gap:12px;flex-wrap:wrap;padding-bottom:6px}
.page-hero__side .btn{white-space:nowrap}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section--band{background:var(--c-band)}
.section--white{background:#fff}
.section__head{max-width:760px;margin-bottom:36px}
.section__head h2{font-size:clamp(24px,2.4vw,30px);line-height:1.35;font-weight:600}
.section__head p{font-size:15px;color:var(--c-text-2);margin-top:10px}
.section__head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}

/* ---------- version card ---------- */
.version-card{
  background:var(--c-card);
  border:1px solid var(--c-border-2);
  border-radius:var(--r-xl);
  box-shadow:var(--sh-card);
  padding:28px;
  display:grid;grid-template-columns:minmax(0,1fr) auto;
  gap:32px;align-items:center;
}
.version-card__head{display:flex;gap:24px;align-items:flex-start;min-width:0}
.version-card__thumb{
  width:220px;flex-shrink:0;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-lg);background:#EEF3FB;
}
.version-card__titles{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.version-card__num{
  font-family:var(--mono);font-size:38px;font-weight:700;line-height:1.1;
  color:var(--c-primary-dark);letter-spacing:.01em;
}
.version-card__note{font-size:13px;color:var(--c-text-3);margin-top:8px}
.version-card__meta{display:flex;flex-wrap:wrap;gap:12px 34px;margin-top:18px}
.version-card__meta dt{font-size:12px;color:var(--c-text-3);margin-bottom:2px}
.version-card__meta dd{font-size:14px;font-weight:500;color:var(--c-text)}
.version-card__actions{display:flex;flex-direction:column;align-items:flex-start;gap:14px}

/* ---------- version list ---------- */
.vlist{
  background:var(--c-card);border:1px solid var(--c-border-2);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-sm);
}
.vlist__row{
  display:grid;
  grid-template-columns:120px 130px 110px minmax(0,1fr) 130px;
  align-items:center;gap:20px;
  padding:0 24px;min-height:64px;
  border-bottom:1px solid var(--c-border-2);
  transition:background .16s ease-out;
}
.vlist__row:last-child{border-bottom:0}
.vlist__row:hover{background:#F6F9FF}
.vlist__ver{
  font-family:var(--mono);font-size:15px;font-weight:700;color:var(--c-primary-dark);
  display:flex;align-items:center;gap:8px;
}
.vlist__date,.vlist__size{font-size:13px;color:var(--c-text-3)}
.vlist__desc{
  font-size:14px;color:var(--c-text-2);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.vlist__act{display:flex;justify-content:flex-end}

/* ---------- spec cards ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.spec-card{
  background:var(--c-card);border:1px solid var(--c-border-2);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-sm);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.spec-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#CFE0F8}
.spec-card__head{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.spec-card__icon{
  width:38px;height:38px;border-radius:var(--r-sm);flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);
}
.spec-card__icon svg{width:20px;height:20px}
.spec-card h3{font-size:17px;font-weight:600;line-height:1.5}
.spec-card dl{display:flex;flex-direction:column;gap:8px}
.spec-card dl>div{display:flex;gap:12px;font-size:14px;line-height:1.7}
.spec-card dt{color:var(--c-text-3);flex:0 0 76px}
.spec-card dd{color:var(--c-text-2);min-width:0}

/* ---------- steps ---------- */
.steps{display:flex;flex-direction:column;gap:0;max-width:860px}
.steps__item{position:relative;display:flex;gap:20px;padding-bottom:28px}
.steps__item:last-child{padding-bottom:0}
.steps__item::before{
  content:"";position:absolute;left:21px;top:44px;bottom:0;width:2px;
  background:var(--c-border-2);
}
.steps__item:last-child::before{display:none}
.steps__num{
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-family:var(--mono);font-size:18px;font-weight:700;
  position:relative;z-index:1;
}
.steps__body{padding-top:6px;min-width:0}
.steps__body h3{font-size:17px;font-weight:600;margin-bottom:6px}
.steps__body p{font-size:15px;color:var(--c-text-2)}

/* ---------- verify ---------- */
.verify{
  background:var(--c-card);border:1px solid var(--c-border-2);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-sm);
}
.code-block{
  font-family:var(--mono);font-size:13.5px;line-height:2;color:var(--c-text-2);
  background:var(--c-band);border-radius:var(--r-md);padding:18px 20px;
  overflow-x:auto;white-space:pre;
}
.code-block b{color:var(--c-text);font-weight:600}
.verify__note{font-size:12px;color:var(--c-text-3);margin-top:14px}

/* ---------- faq ---------- */
.faq{max-width:880px;margin:0 auto;background:var(--c-card);border:1px solid var(--c-border-2);border-radius:var(--r-lg);box-shadow:var(--sh-sm);overflow:hidden}
.faq__item{border-bottom:1px solid var(--c-border-2)}
.faq__item:last-child{border-bottom:0}
.faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:8px 24px;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-text);
  transition:background .16s ease-out;
}
.faq__q:hover{background:#F8FAFF}
.faq__icon{
  position:relative;width:18px;height:18px;flex-shrink:0;
  transition:transform .2s ease-out;
}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq__icon::before{width:14px;height:2px}
.faq__icon::after{width:2px;height:14px}
.faq__item.is-open .faq__icon{transform:rotate(45deg)}
.faq__a{
  display:none;
  padding:0 24px 20px;font-size:15px;line-height:1.8;color:var(--c-text-2);
  background:#F8FAFF;
}
.faq__item.is-open .faq__a{display:block}

/* ---------- cta ---------- */
.cta{background:var(--c-primary-dark);color:#fff;padding:56px 0}
.cta__inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta h2{font-size:clamp(22px,2.2vw,28px);line-height:1.35;font-weight:600;color:#fff}
.cta p{font-size:14px;color:rgba(255,255,255,.78);margin-top:8px}
.cta__actions{display:flex;gap:12px;flex-wrap:wrap}
.cta .btn--primary{background:#fff;color:var(--c-primary-dark)}
.cta .btn--primary:hover{background:#F2F6FE}
.cta .btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.cta .btn--ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ---------- footer ---------- */
.footer{background:var(--c-footer);color:var(--c-footer-text);padding:64px 0 28px}
.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:16px}
.footer__brand .logo__main{color:#fff}
.footer__brand .logo__sub{color:rgba(199,214,238,.72)}
.footer p{font-size:13.5px;line-height:1.85;color:rgba(199,214,238,.86);max-width:320px}
.footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px}
.footer ul li+li{margin-top:10px}
.footer ul a{font-size:13.5px;color:rgba(199,214,238,.86);transition:color .16s ease-out}
.footer ul a:hover{color:#fff;text-decoration:underline}
.footer__bottom{
  margin-top:40px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(199,214,238,.7);
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 24px}
}
@media (max-width:1023px){
  .nav,.header__cta{display:none}
  .burger{display:flex}
  .section{padding:72px 0}
  .page-hero{padding:32px 0 44px}
  .page-hero__grid{grid-template-columns:1fr;align-items:start;gap:26px}
  .spec-grid{grid-template-columns:1fr}
  .version-card{grid-template-columns:1fr;gap:24px}
  .version-card__actions{flex-direction:row;flex-wrap:wrap;align-items:center}
  .vlist__row{grid-template-columns:110px 120px minmax(0,1fr) 120px;gap:16px}
  .vlist__desc{display:none}
  .footer__grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .page-hero h1{font-size:30px}
  .page-hero__side{width:100%}
  .page-hero__side .btn{width:100%}
  .version-card{padding:20px}
  .version-card__head{flex-direction:column;gap:16px}
  .version-card__thumb{width:100%}
  .version-card__num{font-size:32px}
  .version-card__actions .btn{width:100%}
  .vlist__row{
    grid-template-columns:1fr;gap:6px;padding:16px 20px;min-height:0;
  }
  .vlist__desc{display:block;white-space:normal;font-size:13.5px}
  .vlist__act{justify-content:flex-start;margin-top:6px}
  .vlist__act .btn{width:auto}
  .section__head--row{flex-direction:column;align-items:flex-start}
  .cta__inner{flex-direction:column;align-items:flex-start}
  .cta__actions{width:100%}
  .cta__actions .btn{width:100%}
  .footer{padding:48px 0 24px}
  .footer__grid{grid-template-columns:1fr;gap:26px}
  .footer__bottom{flex-direction:column;gap:8px}
  .faq__q{padding:8px 18px;font-size:15px}
  .faq__a{padding:0 18px 18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --c-primary:#1A5FD0;
  --c-primary-dark:#0F3E96;
  --c-primary-hover:#1450B0;
  --c-primary-soft:#EAF1FE;
  --c-primary-ring:rgba(26,95,208,.12);
  --c-teal:#12A594;
  --c-teal-soft:#E3F6F3;
  --c-amber:#FF7A2F;
  --c-amber-soft:#FFF1E8;
  --c-ink:#0F1B2D;
  --c-text-2:#47536B;
  --c-text-3:#7A8699;
  --c-border:#E4E9F2;
  --c-border-2:#E9EEF7;
  --c-line:#D6E0F0;
  --c-bg:#F6F8FC;
  --c-card:#FFFFFF;
  --c-band:#F4F7FD;
  --c-band-primary:#F2F6FE;
  --c-footer:#0F2A5C;
  --c-footer-text:#C7D6EE;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:16px;
  --r-pill:999px;
  --sh-sm:0 1px 3px rgba(21,58,120,.06);
  --sh-card:0 6px 20px -6px rgba(21,58,120,.10),0 2px 6px rgba(21,58,120,.05);
  --sh-hover:0 16px 36px -12px rgba(21,58,120,.20);
  --container:1240px;
  --t-fast:180ms ease-out;
  --font: "PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei","Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono: "SFMono-Regular","JetBrains Mono",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--c-ink);
  background:var(--c-bg);
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{line-height:1.35;font-weight:600;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}

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

/* ---------- header ---------- */
.header{
  position:sticky;
  top:0;
  z-index:80;
  background:#fff;
  border-bottom:1px solid var(--c-border-2);
  transition:height var(--t-fast),box-shadow var(--t-fast);
}
.header__inner{
  display:flex;
  align-items:center;
  gap:32px;
  height:68px;
  transition:height var(--t-fast);
}
.header.is-scrolled .header__inner{height:60px;}
.header.is-scrolled{box-shadow:var(--sh-sm);}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo__mark{
  width:22px;height:22px;border-radius:6px;
  background:linear-gradient(135deg,var(--c-primary),#2C7BE5);
  position:relative;flex:0 0 auto;
}
.logo__mark::after{
  content:"";position:absolute;inset:6px;border-radius:2px;background:#fff;opacity:.9;
}
.logo__text{display:flex;align-items:baseline;gap:6px;}
.logo__main{font-size:21px;font-weight:700;color:var(--c-primary);letter-spacing:.01em;}
.logo__sub{font-size:12px;color:var(--c-text-3);font-weight:500;}
.nav{display:flex;align-items:center;gap:28px;margin-left:8px;}
.nav__item{position:relative;}
.nav__link{
  display:inline-flex;align-items:center;gap:6px;
  height:68px;
  font-size:15px;font-weight:500;color:var(--c-text-2);
  position:relative;
  transition:color var(--t-fast),height var(--t-fast);
}
.header.is-scrolled .nav__link{height:60px;}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform var(--t-fast);
}
.header.is-scrolled .nav__link::after{bottom:10px;}
.nav__link:hover,.nav__link.is-active{color:var(--c-primary);}
.nav__link:hover::after,.nav__link.is-active::after{transform:scaleX(1);}
.nav__caret{
  width:6px;height:6px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-2px);transition:transform var(--t-fast);
}
.nav__item.is-open .nav__caret{transform:rotate(225deg) translateY(-1px);}
.header__actions{margin-left:auto;display:flex;align-items:center;gap:14px;}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-md);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--c-text-2);border:1px solid transparent;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast);
}
.icon-btn:hover{background:var(--c-primary-soft);color:var(--c-primary);border-color:var(--c-border);}
.icon-btn svg{width:18px;height:18px;}

/* mega */
.mega{
  position:absolute;top:calc(100% + 8px);left:-16px;
  width:min(920px,calc(100vw - 48px));
  background:#fff;
  border:1px solid var(--c-border-2);
  border-radius:var(--r-xl);
  box-shadow:var(--sh-hover);
  padding:28px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity 180ms ease-out,transform 180ms ease-out,visibility 180ms;
}
.nav__item.is-open .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega__top{
  font-size:12px;color:var(--c-text-3);line-height:1.6;
  padding-bottom:14px;margin-bottom:18px;
  border-bottom:1px solid var(--c-border-2);
}
.mega__grid{display:grid;grid-template-columns:1.25fr 1.1fr .9fr;gap:28px;}
.mega__title{font-size:14px;font-weight:600;color:var(--c-ink);margin-bottom:10px;}
.mega__list li + li{margin-top:2px;}
.mega__list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:8px 10px;border-radius:var(--r-sm);
  font-size:14px;color:var(--c-text-2);
  transition:background var(--t-fast),color var(--t-fast);
}
.mega__list a:hover{background:var(--c-primary-soft);color:var(--c-primary);}
.mega__list span{font-size:12px;color:var(--c-text-3);}
.mega__news li + li{margin-top:10px;}
.mega__news a{
  display:block;padding:10px;border-radius:var(--r-sm);
  border:1px solid var(--c-border-2);
  transition:border-color var(--t-fast),background var(--t-fast);
}
.mega__news a:hover{border-color:#BFD4F5;background:#FAFCFF;}
.mega__news strong{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  font-size:14px;font-weight:600;line-height:1.5;color:var(--c-ink);
}
.mega__news time{display:block;margin-top:6px;font-size:12px;color:var(--c-text-3);}
.mega__card{
  display:block;border:1px solid var(--c-border-2);border-radius:var(--r-lg);
  overflow:hidden;transition:box-shadow var(--t-fast),transform var(--t-fast);
}
.mega__card:hover{transform:translateY(-3px);box-shadow:var(--sh-card);}
.mega__card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:#EEF3FB;}
.mega__card-body{padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:8px;}
.mega__card-body strong{font-size:14px;font-weight:600;color:var(--c-ink);}
.mega__card-body span{color:var(--c-primary);font-size:14px;}

/* hamburger */
.burger{display:none;width:44px;height:44px;border-radius:var(--r-md);align-items:center;justify-content:center;}
.burger span{display:block;width:20px;height:2px;background:var(--c-ink);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:var(--c-ink);border-radius:2px;
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.burger.is-active span{background:var(--c-primary);}
.burger.is-active span::before,.burger.is-active span::after{background:var(--c-primary);}

/* drawer */
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:120;
  width:min(360px,86vw);background:#fff;
  transform:translateX(102%);transition:transform 220ms ease-out;
  display:flex;flex-direction:column;
  box-shadow:-12px 0 40px -20px rgba(15,27,45,.4);
}
.drawer.is-open{transform:translateX(0);}
.drawer__head{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;border-bottom:1px solid var(--c-border-2);
}
.drawer__close{width:40px;height:40px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;color:var(--c-text-2);}
.drawer__close:hover{background:var(--c-primary-soft);color:var(--c-primary);}
.drawer__body{flex:1;overflow-y:auto;padding:10px 12px 24px;}
.drawer__link{
  display:flex;align-items:center;min-height:44px;padding:0 12px;border-radius:var(--r-md);
  font-size:15px;font-weight:500;color:var(--c-text-2);
}
.drawer__link:hover,.drawer__link.is-active{background:var(--c-primary-soft);color:var(--c-primary);}
.drawer__sub{padding:4px 12px 10px;}
.drawer__sub a{
  display:block;padding:9px 10px;border-radius:var(--r-sm);font-size:14px;color:var(--c-text-2);
}
.drawer__sub a:hover{background:var(--c-band);color:var(--c-primary);}
.drawer__foot{padding:16px 20px;border-top:1px solid var(--c-border-2);}
.overlay{
  position:fixed;inset:0;background:rgba(15,27,45,.45);z-index:110;
  opacity:0;visibility:hidden;transition:opacity 200ms ease-out,visibility 200ms;
}
.overlay.is-open{opacity:1;visibility:visible;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border-radius:var(--r-md);
  padding:0 24px;height:48px;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),transform var(--t-fast),box-shadow var(--t-fast);
  white-space:nowrap;
}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-sm);}
.btn--primary:hover{background:var(--c-primary-hover);transform:translateY(-1px);box-shadow:var(--sh-card);}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{background:#fff;color:var(--c-primary);border:1px solid var(--c-line);}
.btn--ghost:hover{border-color:var(--c-primary);background:#F4F8FF;}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--xs{height:32px;padding:0 14px;font-size:13px;border-radius:var(--r-sm);}
.btn--light{background:#fff;color:var(--c-primary-dark);}
.btn--light:hover{background:#EAF1FE;}
.btn--outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55);}
.btn--outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff;}
.btn[disabled],.btn.is-disabled{
  background:#EEF1F6;color:#9AA6B8;border-color:#EEF1F6;box-shadow:none;cursor:not-allowed;transform:none;
}
.btn--block{width:100%;}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;line-height:1.5;
}
.badge--cat{background:var(--c-primary-soft);color:var(--c-primary);}
.badge--ver{background:var(--c-teal-soft);color:var(--c-teal);}
.badge--new{background:var(--c-amber-soft);color:var(--c-amber);}
.badge--muted{background:var(--c-band);color:var(--c-text-3);}

/* ---------- band / section ---------- */
.band{background:#fff;}
.band--alt{background:var(--c-band);}
.band--primary{background:var(--c-band-primary);}
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section__head{max-width:760px;margin-bottom:36px;}
.section__head--center{margin-left:auto;margin-right:auto;text-align:center;}
.section h2{font-size:28px;font-weight:600;}
.section__desc{margin-top:10px;font-size:15px;color:var(--c-text-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;color:var(--c-primary);
  letter-spacing:.08em;margin-bottom:12px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary);}

/* ---------- breadcrumb ---------- */
.crumb{padding:20px 0 0;font-size:13px;color:var(--c-text-3);}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li + li::before{content:"｜";color:#C3CDE0;}
.crumb a{color:var(--c-text-3);transition:color var(--t-fast);}
.crumb a:hover{color:var(--c-primary);}
.crumb [aria-current]{color:var(--c-text-3);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  background:#fff;
  border-bottom:1px solid var(--c-border-2);
  padding:44px 0 40px;
}
.page-hero::before{
  content:"";position:absolute;top:-180px;right:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(26,95,208,.08),rgba(26,95,208,0) 68%);
}
.page-hero__inner{position:relative;text-align:center;max-width:820px;margin:0 auto;}
.page-hero h1{font-size:36px;font-weight:700;line-height:1.32;}
.page-hero__desc{margin:14px auto 0;font-size:15px;color:var(--c-text-2);max-width:640px;}
.filter-bar{
  display:flex;flex-wrap:wrap;justify-content:center;gap:10px;
  margin-top:26px;
}
.filter-bar a{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;
  border-radius:var(--r-pill);
  font-size:14px;font-weight:500;color:var(--c-text-2);
  border:1px solid var(--c-border);
  background:#fff;
  transition:color var(--t-fast),background var(--t-fast),border-color var(--t-fast);
}
.filter-bar a:hover{color:var(--c-primary);border-color:#BFD4F5;background:#FAFCFF;}
.filter-bar a.is-active{
  background:var(--c-primary-soft);color:var(--c-primary);
  border-color:rgba(26,95,208,.4);font-weight:600;
}

/* ---------- featured card ---------- */
.featured{
  display:grid;grid-template-columns:1.05fr 1fr;
  border-radius:var(--r-xl);overflow:hidden;
  background:#fff;border:1px solid var(--c-border-2);
  box-shadow:var(--sh-card);
  transition:transform var(--t-fast),box-shadow var(--t-fast),border-color var(--t-fast);
}
.featured:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#CFDDF5;}
.featured__media{position:relative;background:#EEF3FB;min-height:280px;}
.featured__media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9;}
.featured__body{padding:34px 34px 30px;display:flex;flex-direction:column;align-items:flex-start;gap:14px;}
.featured h3{font-size:23px;font-weight:600;line-height:1.45;}
.featured p{font-size:15px;color:var(--c-text-2);line-height:1.85;}
.meta-row{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  font-size:12px;color:var(--c-text-3);
}
.meta-row .dotline{width:1px;height:12px;background:var(--c-border);}
.link-arrow{color:var(--c-primary);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.link-arrow:hover{text-decoration:underline;}

/* ---------- news grid ---------- */
.news-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;margin-top:24px;
}
.news-card{
  display:flex;flex-direction:column;
  background:var(--c-card);
  border:1px solid var(--c-border-2);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:transform var(--t-fast),box-shadow var(--t-fast),border-color var(--t-fast);
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#CFDDF5;}
.news-card__media{background:#EEF3FB;}
.news-card__media img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-card__body{padding:22px 24px 20px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-card h3{
  font-size:18px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__sum{
  font-size:14px;color:var(--c-text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--c-border-2);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:12px;color:var(--c-text-3);
}
.news-card__foot a{color:var(--c-primary);font-weight:600;}

/* ---------- pagination ---------- */
.pager{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:10px;
  margin-top:44px;
}
.pager a,.pager span{
  min-width:40px;height:40px;padding:0 14px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-md);font-size:14px;font-weight:500;
  border:1px solid var(--c-border);background:#fff;color:var(--c-text-2);
  transition:border-color var(--t-fast),color var(--t-fast),background var(--t-fast);
}
.pager a:hover{border-color:var(--c-primary);color:var(--c-primary);background:#F4F8FF;}
.pager .is-current{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600;}
.pager .is-disabled{color:#9AA6B8;background:#F3F5F9;border-color:#E9EEF7;cursor:not-allowed;}

/* ---------- tags & subscribe ---------- */
.split-duo{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:stretch;}
.panel{
  background:#fff;border:1px solid var(--c-border-2);border-radius:var(--r-lg);
  box-shadow:var(--sh-card);padding:28px;
}
.panel h2{font-size:20px;font-weight:600;}
.panel__desc{margin-top:8px;font-size:14px;color:var(--c-text-2);}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.tag-cloud a{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;
  border-radius:var(--r-pill);border:1px solid var(--c-border);
  font-size:13px;color:var(--c-text-2);background:#FAFCFF;
  transition:color var(--t-fast),border-color var(--t-fast),background var(--t-fast);
}
.tag-cloud a:hover{color:var(--c-primary);border-color:#BFD4F5;background:var(--c-primary-soft);}
.subscribe{display:flex;flex-direction:column;gap:14px;background:var(--c-band-primary);border-color:#D9E6FA;}
.subscribe__list{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--c-text-2);}
.subscribe__list li{display:flex;gap:8px;align-items:flex-start;}
.subscribe__list li::before{
  content:"";width:6px;height:6px;border-radius:2px;background:var(--c-primary);
  margin-top:9px;flex:0 0 auto;
}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;
  background-color:var(--c-primary-dark);
  background-image:linear-gradient(90deg,rgba(15,62,150,.94),rgba(15,62,150,.86)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  color:#fff;
  border-radius:0;
}
.cta-band__inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:56px 0;
}
.cta-band h2{font-size:26px;color:#fff;}
.cta-band p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.82);max-width:620px;}
.cta-band__actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.footer{background:var(--c-footer);color:var(--c-footer-text);padding:64px 0 0;margin-top:0;}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer__brand .logo__main{color:#fff;}
.footer__brand .logo__sub{color:rgba(199,214,238,.75);}
.footer p{font-size:14px;line-height:1.8;color:var(--c-footer-text);max-width:340px;}
.footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer ul li + li{margin-top:10px;}
.footer ul a{font-size:14px;color:var(--c-footer-text);transition:color var(--t-fast);}
.footer ul a:hover{color:#fff;text-decoration:underline;}
.footer__bottom{
  margin-top:48px;padding:20px 0 26px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(199,214,238,.8);
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 24px;}
  .footer__grid{grid-template-columns:1.5fr 1fr 1fr;row-gap:32px;}
}
@media (max-width:1023px){
  .nav{display:none;}
  .burger{display:flex;}
  .section{padding:72px 0;}
  .page-hero h1{font-size:32px;}
  .featured{grid-template-columns:1fr;}
  .featured__media{min-height:0;}
  .featured__body{padding:26px 24px;}
  .split-duo{grid-template-columns:1fr;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;padding:48px 0;}
  .footer__grid{grid-template-columns:1fr 1fr;row-gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .header__inner{height:60px;gap:16px;}
  .header__actions .btn{display:none;}
  .section{padding:56px 0;}
  .page-hero{padding:32px 0 30px;}
  .page-hero h1{font-size:30px;}
  .page-hero__desc{font-size:14px;}
  .section h2{font-size:23px;}
  .featured h3{font-size:19px;}
  .news-grid{grid-template-columns:1fr;gap:20px;}
  .news-card__body{padding:20px;}
  .panel{padding:22px;}
  .cta-band h2{font-size:22px;}
  .cta-band__actions .btn{width:100%;}
  .footer{padding-top:48px;}
  .footer__grid{grid-template-columns:1fr;}
  .footer__bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:479px){
  .logo__sub{display:none;}
  .page-hero h1{font-size:26px;line-height:1.35;}
  .filter-bar{gap:8px;}
  .filter-bar a{height:32px;padding:0 12px;font-size:13px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
  --c-primary:#1A5FD0;
  --c-primary-dark:#0F3E96;
  --c-primary-soft:#EAF1FE;
  --c-primary-ring:rgba(26,95,208,.12);
  --c-teal:#12A594;
  --c-teal-soft:#E3F6F3;
  --c-amber:#FF7A2F;
  --c-amber-soft:#FFF1E8;
  --t-main:#0F1B2D;
  --t-sub:#47536B;
  --t-muted:#7A8699;
  --line:#E4E9F2;
  --line-soft:#E9EEF7;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --bg-soft:#F4F7FD;
  --bg-quote:#F8FAFF;
  --r-card:14px;
  --r-lg:16px;
  --r-btn:10px;
  --sh-sm:0 1px 3px rgba(21,58,120,.06);
  --sh-card:0 6px 20px -6px rgba(21,58,120,.10),0 2px 6px rgba(21,58,120,.05);
  --sh-hover:0 16px 36px -12px rgba(21,58,120,.20);
  --font:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",Inter,"Helvetica Neue",Arial,sans-serif;
  --head-h:68px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--t-main);
  background:var(--bg);
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease-out,background-color .18s ease-out;}
a:hover{color:var(--c-primary-dark);}
button,input,textarea,select{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line-soft);
  transition:height .2s ease-out,box-shadow .2s ease-out;
}
.header__inner{
  display:flex;align-items:center;gap:24px;
  height:var(--head-h);
  transition:height .2s ease-out;
}
.header.is-scrolled{box-shadow:var(--sh-sm);}
.header.is-scrolled .header__inner{height:60px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo__mark{
  width:26px;height:26px;border-radius:8px;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-primary-dark) 100%);
  position:relative;flex:0 0 26px;
}
.logo__mark::after{
  content:"";position:absolute;inset:8px;border-radius:3px;background:#fff;opacity:.92;
}
.logo__text{display:flex;flex-direction:column;line-height:1.1;}
.logo__main{font-size:20px;font-weight:700;color:var(--c-primary-dark);letter-spacing:.02em;}
.logo__sub{font-size:11px;color:var(--t-muted);letter-spacing:.14em;}
.nav{display:flex;align-items:center;gap:28px;margin-left:12px;}
.nav__item{position:relative;}
.nav__link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:8px 0;font-size:15px;font-weight:500;color:var(--t-sub);
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.nav__link:hover{color:var(--c-primary);}
.nav__link:hover::after,.nav__link.is-active::after{transform:scaleX(1);}
.nav__link.is-active{color:var(--c-primary);font-weight:600;}
.nav__caret{
  width:8px;height:8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translate(-1px,-2px);transition:transform .2s ease-out;
}
.nav__item.is-open .nav__caret{transform:rotate(-135deg) translate(-2px,-2px);}
.header__actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-btn);
  cursor:pointer;color:var(--t-sub);transition:all .18s ease-out;
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:#F4F8FF;}
.icon-btn svg{width:18px;height:18px;}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.02em;
  cursor:pointer;text-align:center;text-decoration:none;
  transition:transform .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,color .18s ease-out;
}
.btn--primary{background:var(--c-primary);color:#fff;}
.btn--primary:hover{background:#1450B0;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-hover);}
.btn--primary:active{transform:none;box-shadow:none;}
.btn--ghost{background:#fff;color:var(--c-primary);border-color:#D6E0F0;}
.btn--ghost:hover{border-color:var(--c-primary);background:#F4F8FF;color:var(--c-primary);}
.btn--lg{height:52px;padding:0 26px;}
.btn--md{height:44px;padding:0 22px;}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{
  background:#EEF1F6;color:#9AA6B8;border-color:#E4E9F2;cursor:not-allowed;transform:none;box-shadow:none;
}
.text-link{
  color:var(--c-primary);font-size:14px;font-weight:600;
  border-bottom:1px dashed rgba(26,95,208,.5);
}
.text-link:hover{border-bottom-style:solid;border-bottom-color:var(--c-primary);}

/* search bar */
.searchbar{
  max-height:0;overflow:hidden;
  border-top:1px solid transparent;
  transition:max-height .2s ease-out,border-color .2s ease-out;
}
.searchbar.is-open{max-height:88px;border-top-color:var(--line-soft);}
.searchbar__inner{display:flex;gap:12px;padding:16px 0;}
.searchbar__inner input{
  flex:1;height:44px;border:1px solid #D6E0F0;border-radius:var(--r-btn);padding:0 14px;background:#fff;
}
.searchbar__inner input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-ring);}

/* mega */
.mega{
  position:absolute;top:calc(100% + 14px);left:-16px;
  width:min(920px,calc(100vw - 48px));
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-lg);
  box-shadow:var(--sh-hover);padding:28px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s ease-out,transform .18s ease-out,visibility .18s ease-out;
}
.nav__item.is-open .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega__top{font-size:12px;color:var(--t-muted);border-bottom:1px solid var(--line-soft);padding-bottom:14px;margin-bottom:18px;}
.mega__grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:26px;}
.mega__title{font-size:13px;font-weight:600;color:var(--t-main);margin-bottom:10px;}
.mega__list li a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 10px;border-radius:8px;color:var(--t-sub);font-size:14px;
}
.mega__list li a span{font-size:12px;color:var(--t-muted);}
.mega__list li a:hover{background:#F4F8FF;color:var(--c-primary);}
.mega__news li a{
  display:block;padding:10px;border-radius:8px;
}
.mega__news li a strong{display:block;font-size:14px;font-weight:500;color:var(--t-sub);line-height:1.6;}
.mega__news li a time{display:block;font-size:12px;color:var(--t-muted);margin-top:2px;}
.mega__news li a:hover{background:#F4F8FF;}
.mega__news li a:hover strong{color:var(--c-primary);}
.mega__card{
  display:block;border:1px solid var(--line-soft);border-radius:12px;overflow:hidden;background:#fff;
}
.mega__card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EEF3FB;}
.mega__card div{padding:14px;font-size:14px;font-weight:600;color:var(--t-main);}
.mega__card:hover{box-shadow:var(--sh-card);border-color:#D6E0F0;}
.mega__card:hover div{color:var(--c-primary);}

/* nav toggle + drawer */
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;cursor:pointer;position:relative;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:var(--t-main);transition:all .2s ease-out;
}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
.nav-toggle.is-open span{background:var(--c-primary);}
.nav-toggle.is-open span:nth-child(1){top:21px;transform:rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){top:21px;transform:rotate(-45deg);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(15,27,45,.45);opacity:0;visibility:hidden;
  transition:opacity .2s ease-out,visibility .2s ease-out;z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);background:#fff;z-index:100;
  transform:translateX(100%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;box-shadow:-12px 0 32px -18px rgba(21,58,120,.35);
}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line-soft);}
.drawer__title{font-size:15px;font-weight:600;}
.drawer__close{width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);cursor:pointer;color:var(--t-sub);}
.drawer__close:hover{border-color:var(--c-primary);color:var(--c-primary);}
.drawer__body{padding:12px 12px 20px;overflow-y:auto;flex:1;}
.drawer__link{
  display:flex;align-items:center;min-height:44px;padding:0 14px;border-radius:10px;
  font-size:15px;color:var(--t-sub);font-weight:500;
}
.drawer__link:hover{background:#F4F8FF;color:var(--c-primary);}
.drawer__link.is-active{background:var(--c-primary-soft);color:var(--c-primary);font-weight:600;}
.drawer__foot{padding:16px 20px;border-top:1px solid var(--line-soft);}

/* ---------- breadcrumb ---------- */
.crumb{padding:22px 0 0;font-size:13px;color:var(--t-muted);}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb li{display:inline-flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"｜";color:#C3CDDE;}
.crumb a{color:var(--t-muted);}
.crumb a:hover{color:var(--c-primary);}
.crumb li[aria-current]{color:var(--t-muted);}

/* ---------- hero ---------- */
.help-hero{
  position:relative;overflow:hidden;
  padding:36px 0 8px;
}
.help-hero::after{
  content:"";position:absolute;top:-160px;right:-120px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(26,95,208,.08) 0%,rgba(26,95,208,0) 70%);
  pointer-events:none;
}
.help-hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  color:var(--c-primary);letter-spacing:.08em;
}
.help-hero__eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--c-primary);}
.help-hero__title{
  font-size:clamp(30px,3.4vw,38px);line-height:1.3;font-weight:700;
  margin:14px 0 12px;max-width:900px;
}
.help-hero__desc{font-size:16px;color:var(--t-sub);max-width:760px;}
.help-search{margin-top:26px;max-width:640px;}
.help-search__field{
  display:flex;align-items:center;height:44px;background:#fff;
  border:1px solid #D6E0F0;border-radius:var(--r-btn);padding:0 6px 0 14px;
  box-shadow:var(--sh-sm);transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.help-search__field:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-ring);}
.help-search__field input{
  flex:1;border:0;outline:none;background:transparent;height:100%;font-size:15px;
}
.help-search__field input::placeholder{color:var(--t-muted);}
.help-search__btn{
  width:36px;height:32px;display:inline-flex;align-items:center;justify-content:center;
  border:0;border-radius:8px;background:var(--c-primary);color:#fff;cursor:pointer;
}
.help-search__btn:hover{background:#1450B0;}
.help-search__btn svg{width:16px;height:16px;}
.help-search__tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.help-search__tags a{
  font-size:12px;color:var(--t-sub);background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:4px 10px;
}
.help-search__tags a:hover{border-color:var(--c-primary);color:var(--c-primary);background:#F4F8FF;}

/* ---------- layout ---------- */
.help-layout{
  display:grid;grid-template-columns:260px minmax(0,1fr);gap:32px;
  padding:48px 0 0;align-items:start;
}
.toc{
  position:sticky;top:88px;
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:20px;
}
.toc__title{font-size:13px;font-weight:600;color:var(--t-muted);letter-spacing:.06em;margin-bottom:12px;}
.toc__list li a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:10px 12px;border-radius:8px;font-size:14px;color:var(--t-sub);
  border-left:3px solid transparent;
}
.toc__list li a:hover{background:var(--bg-soft);color:var(--c-primary);}
.toc__list li a.is-current{background:var(--c-primary-soft);color:var(--c-primary);font-weight:600;border-left-color:var(--c-primary);}
.toc__list li a span{font-size:12px;color:var(--t-muted);}
.toc__note{
  margin-top:16px;padding-top:16px;border-top:1px solid var(--line-soft);
  font-size:12px;color:var(--t-muted);line-height:1.7;
}

.help-groups{display:flex;flex-direction:column;gap:32px;}
.group{scroll-margin-top:96px;}
.group__head{margin-bottom:16px;}
.group__title{font-size:24px;line-height:1.35;font-weight:600;}
.group__sub{font-size:14px;color:var(--t-sub);margin-top:6px;}

/* accordion */
.acc{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);
  box-shadow:var(--sh-card);overflow:hidden;
}
.acc__item+.acc__item{border-top:1px solid var(--line-soft);}
.acc__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 22px;background:transparent;border:0;cursor:pointer;
  font-size:16px;font-weight:600;line-height:1.6;color:var(--t-main);text-align:left;
  transition:background-color .18s ease-out,color .18s ease-out;
}
.acc__q:hover{background:var(--bg-quote);color:var(--c-primary);}
.acc__icon{
  position:relative;flex:0 0 20px;width:20px;height:20px;
  transition:transform .2s ease-out;
}
.acc__icon::before,.acc__icon::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
}
.acc__icon::before{left:0;right:0;top:9px;height:2px;}
.acc__icon::after{top:0;bottom:0;left:9px;width:2px;}
.acc__item.is-open .acc__icon{transform:rotate(45deg);}
.acc__a{
  display:none;padding:0 22px 22px;background:var(--bg-quote);
  font-size:15px;line-height:1.85;color:var(--t-sub);
}
.acc__item.is-open .acc__a{display:block;}
.acc__a p+p{margin-top:10px;}
.acc__a strong{color:var(--t-main);font-weight:600;}

/* support */
.support{
  margin-top:88px;background:#fff;border:1px solid var(--line-soft);
  border-radius:var(--r-lg);box-shadow:var(--sh-card);overflow:hidden;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
}
.support__aside{
  padding:36px;background:var(--bg-soft);border-right:1px solid var(--line-soft);
}
.support__title{font-size:24px;line-height:1.35;font-weight:600;margin-bottom:12px;}
.support__text{font-size:15px;color:var(--t-sub);}
.support__list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.support__list li{
  display:flex;gap:10px;font-size:14px;color:var(--t-sub);line-height:1.7;
}
.support__list li::before{
  content:"";flex:0 0 8px;width:8px;height:8px;margin-top:8px;border-radius:2px;background:var(--c-primary);
}
.support__figure{
  margin-top:24px;border-radius:12px;overflow:hidden;border:1px solid var(--line-soft);background:#EEF3FB;
}
.support__figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.support__form{padding:36px;}
.form-row{display:flex;flex-direction:column;margin-bottom:18px;}
.form-row label{font-size:13px;font-weight:500;color:var(--t-sub);margin-bottom:6px;}
.form-row input[type="text"],
.form-row input[type="tel"],
.form-row input[type="email"],
.form-row select,
.form-row textarea{
  width:100%;height:44px;border:1px solid #D6E0F0;border-radius:var(--r-btn);
  padding:0 14px;background:#fff;font-size:15px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.form-row textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical;}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-ring);
}
.form-row input::placeholder,.form-row textarea::placeholder{color:var(--t-muted);}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.form-hint{font-size:12px;color:var(--t-muted);margin-top:10px;line-height:1.7;}
.upload{
  display:flex;align-items:center;gap:10px;justify-content:center;
  min-height:64px;border:1px dashed #D6E0F0;border-radius:var(--r-btn);
  background:var(--bg-soft);color:var(--t-muted);font-size:13px;
}
.upload svg{width:18px;height:18px;}

/* CTA band */
.cta-band{
  margin-top:88px;background:var(--c-primary-dark);
  border-radius:var(--r-lg);padding:44px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band__title{font-size:26px;line-height:1.35;font-weight:600;color:#fff;}
.cta-band__text{font-size:14px;color:#C7D6EE;margin-top:8px;}
.cta-band__actions{display:flex;gap:12px;flex-wrap:wrap;}
.cta-band .btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.cta-band .btn--ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;}
.cta-band .btn--white{background:#fff;color:var(--c-primary-dark);}
.cta-band .btn--white:hover{background:#EAF1FE;color:var(--c-primary-dark);transform:translateY(-1px);}

/* footer */
.footer{margin-top:96px;background:#0F2A5C;color:#C7D6EE;padding:64px 0 0;}
.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:14px;}
.footer__brand .logo__main{color:#fff;}
.footer__brand .logo__sub{color:rgba(199,214,238,.7);}
.footer p{font-size:14px;line-height:1.8;color:rgba(199,214,238,.85);max-width:340px;}
.footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer ul li+li{margin-top:10px;}
.footer ul a{font-size:14px;color:#C7D6EE;}
.footer ul a:hover{color:#fff;text-decoration:underline;}
.footer__bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(199,214,238,.75);
}

/* reveal */
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

@media (max-width:1279px){
  .container{max-width:100%;}
}
@media (max-width:1023px){
  .nav{display:none;}
  .nav-toggle{display:block;}
  .mega{display:none;}
  .help-layout{grid-template-columns:1fr;padding-top:36px;}
  .toc{position:static;}
  .toc__list{display:grid;grid-template-columns:1fr 1fr;gap:6px;}
  .support{grid-template-columns:1fr;}
  .support__aside{border-right:0;border-bottom:1px solid var(--line-soft);}
  .footer__grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .header__actions .btn{display:none;}
  .header__inner{gap:12px;}
  .logo__main{font-size:18px;}
  .help-hero{padding-top:26px;}
  .help-hero__title{font-size:30px;}
  .help-layout{padding-top:28px;gap:24px;}
  .toc__list{grid-template-columns:1fr;}
  .group__title{font-size:22px;}
  .acc__q{padding:14px 18px;font-size:15px;}
  .acc__a{padding:0 18px 18px;}
  .support__aside,.support__form{padding:24px;}
  .form-grid{grid-template-columns:1fr;}
  .cta-band{margin-top:56px;padding:32px 24px;flex-direction:column;align-items:flex-start;}
  .cta-band__title{font-size:22px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{width:100%;}
  .footer{margin-top:64px;padding-top:48px;}
  .footer__grid{grid-template-columns:1fr;}
  .footer__bottom{flex-direction:column;}
}
@media (max-width:479px){
  .help-search__tags{display:none;}
  .help-hero__desc{font-size:15px;}
}