/* roulang page: index */
:root{
  --brand:#0E4F6B;
  --brand-dark:#0B4258;
  --brand-light:#E6F1F6;
  --teal:#12A594;
  --accent:#EE6C1F;
  --accent-dark:#D65F16;
  --bg:#F5F8FA;
  --surface:#FFFFFF;
  --surface-2:#EEF4F7;
  --border:#DFE8ED;
  --text:#12212B;
  --text-2:#4A5E6B;
  --text-3:#8095A1;
  --success:#1F8A5B;
  --warn:#C77700;
  --danger:#C0392B;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-hero:18px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(14,79,107,.06);
  --sh-md:0 6px 18px rgba(14,79,107,.08);
  --sh-lg:0 16px 40px rgba(14,79,107,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:68px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-bottom:140px;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  letter-spacing:0;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
h1,h2,h3,h4,p,figure{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
::selection{background:rgba(14,79,107,.14);}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px;}
@media (min-width:768px){.container{padding:0 24px;}}
@media (min-width:1024px){.container{padding:0 32px;}}
@media (min-width:1440px){.container{max-width:1280px;}}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;border-radius:var(--r-btn);z-index:200;}
.skip-link:focus{left:12px;top:12px;}

/* 顶部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--surface);
  border-bottom:1px solid var(--border);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-sm);}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:16px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:28px;height:28px;border-radius:9px;
  background:linear-gradient(150deg,var(--brand),var(--brand-dark));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:14px;font-weight:700;
}
.brand__text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--brand-dark);white-space:nowrap;}
.nav__links{display:none;align-items:center;gap:28px;}
@media (min-width:1024px){.nav__links{display:flex;}}
.nav__link{
  position:relative;
  font-size:15px;
  color:var(--text-2);
  padding:6px 0;
  transition:color .18s var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav__link:hover{color:var(--brand);}
.nav__link:hover::after,.nav__link.is-active::after{transform:scaleX(1);}
.nav__link.is-active{color:var(--brand);font-weight:600;}
.nav__side{display:flex;align-items:center;gap:16px;}
.nav__text-link{display:none;font-size:14px;color:var(--text-2);}
.nav__text-link:hover{color:var(--brand);}
@media (min-width:1024px){.nav__text-link{display:inline-flex;align-items:center;gap:6px;}}
.nav__text-link i{transition:transform .18s var(--ease);}
.nav__text-link:hover i{transform:translateX(4px);}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--accent);color:#fff;box-shadow:var(--sh-sm);}
.btn--primary:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn--primary:active{transform:translateY(1px);box-shadow:none;}
.btn--ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand);}
.btn--ghost:hover{background:var(--brand-light);transform:translateY(-1px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none;}
@media (max-width:480px){.btn{height:46px;width:100%;}}

/* 移动底部 Tab */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:95;
  display:grid;grid-template-columns:repeat(5,1fr);
  height:calc(56px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:#fff;border-top:1px solid var(--border);
  box-shadow:0 -6px 18px rgba(14,79,107,.08);
}
@media (min-width:1024px){.mobile-tab{display:none;}}
.mobile-tab__item{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:10.5px;color:var(--text-3);
}
.mobile-tab__item i{font-size:19px;line-height:1;}
.mobile-tab__item::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%) scaleX(0);
  width:28px;height:2px;background:var(--brand);border-radius:2px;transition:transform .18s var(--ease);
}
.mobile-tab__item.is-active{color:var(--brand);font-weight:600;}
.mobile-tab__item.is-active::before{transform:translateX(-50%) scaleX(1);}

/* 底部固定转化条 */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:calc(56px + env(safe-area-inset-bottom));z-index:94;
  background:#fff;border-top:1px solid var(--border);box-shadow:var(--sh-md);
  transform:translateY(120%);opacity:0;pointer-events:none;
  transition:transform .28s var(--ease),opacity .28s var(--ease);
}
@media (min-width:1024px){.sticky-cta{bottom:0;}}
.sticky-cta.is-visible{transform:translateY(0);opacity:1;pointer-events:auto;}
.sticky-cta__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px;}
@media (min-width:1024px){.sticky-cta__inner{height:72px;}}
.sticky-cta__text{font-size:14px;color:var(--text-2);display:none;}
@media (min-width:768px){.sticky-cta__text{display:block;}}
.sticky-cta__actions{display:flex;align-items:center;gap:10px;width:100%;justify-content:flex-end;}
.sticky-cta__close{
  width:32px;height:32px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-3);background:var(--surface-2);flex-shrink:0;
}
.sticky-cta__close:hover{color:var(--brand);background:var(--brand-light);}
.sticky-cta__actions .btn{height:44px;padding:0 18px;font-size:14px;}
@media (max-width:480px){
  .sticky-cta__actions .btn{width:auto;flex:1;}
}

/* Hero */
.hero{
  position:relative;overflow:hidden;
  background:var(--surface);
  border-bottom:1px solid var(--border);
  padding:56px 0 64px;
}
@media (min-width:1024px){.hero{padding:88px 0 96px;}}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(720px 320px at 88% -10%, rgba(14,79,107,.07), transparent 70%),
    radial-gradient(520px 260px at -6% 110%, rgba(18,165,148,.07), transparent 70%);
  pointer-events:none;
}
.hero__inner{position:relative;display:grid;grid-template-columns:1fr;gap:40px;align-items:center;}
@media (min-width:1024px){.hero__inner{grid-template-columns:7fr 5fr;gap:56px;}}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand);background:var(--brand-light);
  border-radius:var(--r-pill);padding:6px 14px;margin-bottom:18px;
}
.hero__eyebrow i{color:var(--teal);}
.hero h1{
  font-size:27px;line-height:1.35;font-weight:800;letter-spacing:-.01em;color:var(--brand-dark);
}
@media (min-width:768px){.hero h1{font-size:36px;}}
@media (min-width:1280px){.hero h1{font-size:44px;}}
.hero__sub{margin-top:16px;font-size:16px;line-height:1.85;color:var(--text-2);max-width:34em;}
@media (min-width:768px){.hero__sub{font-size:17px;}}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
@media (max-width:480px){.hero__actions{flex-direction:column;}}
.trust-list{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:32px;padding-top:24px;border-top:1px dashed var(--border);}
.trust-list li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-2);}
.trust-list i{color:var(--teal);font-size:14px;}
.hero__media{position:relative;}
.hero__figure{
  position:relative;border-radius:var(--r-hero);overflow:hidden;background:var(--surface-2);
  box-shadow:var(--sh-lg);aspect-ratio:16/10;
}
.hero__figure img{width:100%;height:100%;object-fit:cover;}
.hero__float{
  position:absolute;left:-4px;bottom:-18px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh-md);padding:14px 18px;display:flex;align-items:center;gap:12px;
}
@media (min-width:1024px){.hero__float{left:-28px;bottom:-24px;}}
.hero__float i{font-size:20px;color:var(--accent);}
.hero__float strong{display:block;font-size:18px;font-weight:800;color:var(--brand-dark);line-height:1.2;}
.hero__float span{font-size:12px;color:var(--text-3);}

/* 板块通用 */
.section{padding:56px 0;}
@media (min-width:768px){.section{padding:72px 0;}}
@media (min-width:1024px){.section{padding:96px 0;}}
.section--alt{background:var(--surface-2);}
.section__head{max-width:760px;margin-bottom:36px;}
.section__head--center{margin-left:auto;margin-right:auto;text-align:center;}
.section__kicker{
  display:inline-block;font-size:13px;font-weight:600;color:var(--teal);
  letter-spacing:.06em;margin-bottom:10px;
}
.section h2{font-size:24px;line-height:1.4;font-weight:800;letter-spacing:-.01em;color:var(--brand-dark);}
@media (min-width:1024px){.section h2{font-size:29px;}}
.section__desc{margin-top:12px;font-size:15.5px;color:var(--text-2);}
.section__head--row{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;max-width:none;flex-wrap:wrap;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand);}
.text-link i{transition:transform .18s var(--ease);}
.text-link:hover i{transform:translateX(4px);}

/* 卖点非对称 */
.value-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:1024px){.value-grid{grid-template-columns:8fr 4fr;gap:24px;}}
.value-main{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-sm);display:flex;flex-direction:column;
  transition:box-shadow .18s var(--ease),transform .18s var(--ease);
}
.value-main:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);}
.value-main__media{aspect-ratio:16/9;background:var(--surface-2);overflow:hidden;}
.value-main__media img{width:100%;height:100%;object-fit:cover;}
.value-main__body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
@media (max-width:480px){.value-main__body{padding:20px;}}
.value-main h3{font-size:20px;font-weight:700;color:var(--brand-dark);}
.value-main p{font-size:15px;color:var(--text-2);}
.value-side{display:grid;gap:20px;}
.value-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-sm);display:flex;gap:14px;align-items:flex-start;
  transition:box-shadow .18s var(--ease),transform .18s var(--ease);
}
.value-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);}
.value-card__icon{
  width:42px;height:42px;flex-shrink:0;border-radius:12px;background:var(--brand-light);
  display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:17px;
}
.value-card h3{font-size:17px;font-weight:700;color:var(--brand-dark);margin-bottom:6px;}
.value-card p{font-size:14.5px;color:var(--text-2);}
.tag{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;padding:3px 10px;border-radius:var(--r-pill);
  background:var(--brand-light);color:var(--brand);font-weight:600;
}
.tag--teal{background:rgba(18,165,148,.12);color:#0B7C70;}
.tag--accent{background:rgba(238,108,31,.12);color:#B44F10;}

/* 场景演示 */
.steps{display:grid;grid-template-columns:1fr;gap:28px;}
@media (min-width:768px){.steps{grid-template-columns:repeat(2,1fr);gap:32px;}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr);gap:0;}}
.step{position:relative;padding:0;}
@media (min-width:1024px){.step{padding:0 22px;border-right:1px dashed var(--border);}}
@media (min-width:1024px){.step:last-child{border-right:0;padding-right:0;}}
@media (min-width:1024px){.step:first-child{padding-left:0;}}
.step__num{
  font-size:44px;font-weight:800;line-height:1;color:rgba(14,79,107,.12);letter-spacing:-.02em;
  font-family:system-ui,-apple-system,sans-serif;
}
.step h3{font-size:18px;font-weight:700;color:var(--brand-dark);margin:10px 0 8px;}
.step p{font-size:14.5px;color:var(--text-2);min-height:3.6em;}
.step__media{margin-top:16px;border-radius:var(--r-img);overflow:hidden;background:var(--surface-2);aspect-ratio:16/10;border:1px solid var(--border);}
.step__media img{width:100%;height:100%;object-fit:cover;}
@media (max-width:1023px){
  .step{border-left:2px dashed var(--border);padding-left:20px;}
  .step:last-child{border-left-color:transparent;}
}

/* 资讯列表 CMS */
.news-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr);}}
.news-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-sm);display:flex;flex-direction:column;
  transition:box-shadow .18s var(--ease),transform .18s var(--ease);
}
.news-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);}
.news-card__cover{display:block;aspect-ratio:16/9;background:var(--surface-2);overflow:hidden;}
.news-card__cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.news-card:hover .news-card__cover img{transform:scale(1.04);}
.news-card__body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
@media (max-width:480px){.news-card__body{padding:20px;}}
.news-card h3{font-size:18px;font-weight:700;line-height:1.5;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card:hover h3{color:var(--brand);}
.news-card__excerpt{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card__meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:14px;border-top:1px solid var(--border);}
.news-card__meta time{font-size:12px;color:var(--text-3);}
.news-card__more{font-size:12.5px;color:var(--brand);display:inline-flex;align-items:center;gap:5px;}
.news-card:hover .news-card__more i{transform:translateX(4px);}
.news-card__more i{transition:transform .18s var(--ease);}
.empty-state{
  text-align:center;padding:56px 24px;background:var(--surface);border:1px dashed var(--border);
  border-radius:var(--r-card);
}
.empty-state i{font-size:30px;color:var(--text-3);}
.empty-state p{margin-top:12px;font-size:15px;color:var(--text-2);}
.empty-state .btn{margin-top:20px;}
.skeleton{background:linear-gradient(90deg,var(--surface-2) 25%,#E2EBF0 37%,var(--surface-2) 63%);background-size:400% 100%;animation:skeleton 1.3s ease infinite;border-radius:8px;}
@keyframes skeleton{0%{background-position:100% 50%;}100%{background-position:0 50%;}}

/* 社会认同 */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:24px 16px;}
@media (min-width:1024px){.stats{grid-template-columns:repeat(4,1fr);gap:24px;}}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-sm);}
.stat strong{display:block;font-size:32px;font-weight:800;color:var(--brand);line-height:1.15;letter-spacing:-.02em;font-family:system-ui,-apple-system,sans-serif;}
@media (min-width:1024px){.stat strong{font-size:38px;}}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--text-3);}
.reviews{display:grid;grid-template-columns:1fr;gap:20px;margin-top:36px;}
@media (min-width:768px){.reviews{grid-template-columns:repeat(3,1fr);}}
@media (max-width:767px){
  .reviews{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;margin-right:-16px;}
  .reviews::-webkit-scrollbar{height:5px;}
  .reviews::-webkit-scrollbar-thumb{background:var(--border);border-radius:9px;}
  .review{min-width:82%;scroll-snap-align:start;}
}
.review{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-sm);}
.review__top{display:flex;align-items:center;gap:12px;}
.avatar{width:40px;height:40px;border-radius:50%;overflow:hidden;background:var(--brand-light);display:flex;align-items:center;justify-content:center;color:var(--brand);font-weight:700;font-size:15px;flex-shrink:0;}
.review__name{font-size:14px;font-weight:700;}
.review__role{font-size:12px;color:var(--text-3);}
.review p{margin-top:14px;font-size:14.5px;color:var(--text-2);}
.stars{margin-top:12px;color:var(--accent);font-size:13px;letter-spacing:2px;}
.logo-wall{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;margin-top:36px;background:var(--border);border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;}
@media (min-width:768px){.logo-wall{grid-template-columns:repeat(3,1fr);}}
@media (min-width:1024px){.logo-wall{grid-template-columns:repeat(6,1fr);}}
.logo-wall span{
  background:var(--surface);display:flex;align-items:center;justify-content:center;gap:8px;
  padding:22px 12px;font-size:13.5px;color:var(--text-2);filter:grayscale(1);opacity:.62;
  transition:opacity .18s var(--ease),filter .18s var(--ease),color .18s var(--ease);
}
.logo-wall span:hover{filter:grayscale(0);opacity:1;color:var(--brand);}

/* FAQ */
.faq{max-width:880px;margin:0 auto;display:grid;gap:14px;}
.faq-item{
  background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;
  box-shadow:var(--sh-sm);position:relative;transition:box-shadow .18s var(--ease);
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand);
  transform:scaleY(0);transform-origin:top;transition:transform .18s var(--ease);
}
.faq-item.is-open::before{transform:scaleY(1);}
.faq-item.is-open{box-shadow:var(--sh-md);}
.faq-item__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:16.5px;font-weight:600;color:var(--text);
  transition:color .18s var(--ease);
}
@media (max-width:480px){.faq-item__q{padding:18px 18px;font-size:15.5px;}}
.faq-item__q:hover{color:var(--brand);}
.faq-item__q i{font-size:14px;color:var(--brand);transition:transform .18s var(--ease);flex-shrink:0;}
.faq-item.is-open .faq-item__q i{transform:rotate(180deg);}
.faq-item__a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease);}
.faq-item__a p{padding:0 24px 22px;font-size:15px;color:var(--text-2);line-height:1.85;}
@media (max-width:480px){.faq-item__a p{padding:0 18px 18px;}}
.faq-item.is-open .faq-item__a{max-height:320px;}

/* 页尾 CTA */
.cta-band{
  background:linear-gradient(160deg,var(--brand) 0%,var(--brand-dark) 100%);
  color:#fff;border-radius:var(--r-card);padding:44px 28px;text-align:center;
  box-shadow:var(--sh-lg);
}
@media (min-width:1024px){.cta-band{padding:60px 56px;text-align:left;display:flex;align-items:center;justify-content:space-between;gap:40px;}}
.cta-band h2{color:#fff;font-size:24px;}
@media (min-width:1024px){.cta-band h2{font-size:30px;}}
.cta-band p{margin-top:12px;font-size:15.5px;color:rgba(255,255,255,.82);max-width:46em;}
.cta-band__actions{margin-top:26px;display:flex;flex-direction:column;gap:14px;align-items:center;}
@media (min-width:1024px){.cta-band__actions{margin-top:0;flex-shrink:0;align-items:flex-start;}}
.cta-band__link{font-size:14.5px;color:rgba(255,255,255,.86);display:inline-flex;align-items:center;gap:6px;}
.cta-band__link:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.cta-band__link i{transition:transform .18s var(--ease);}
.cta-band__link:hover i{transform:translateX(4px);}

/* 页脚 */
.site-footer{background:var(--surface-2);border-top:1px solid var(--border);padding:56px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px 24px;}
@media (min-width:1024px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;}}
.footer-brand__top{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:32em;}
.socials{display:flex;gap:10px;margin-top:18px;}
.socials a{
  width:36px;height:36px;border-radius:10px;background:#fff;border:1px solid var(--border);
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.socials a:hover{color:var(--brand);border-color:var(--brand);transform:translateY(-2px);}
.site-footer h4{font-size:14px;font-weight:700;color:var(--brand-dark);margin-bottom:14px;}
.footer-list{display:grid;gap:10px;}
.footer-list a,.footer-list span{font-size:14px;color:var(--text-2);transition:color .18s var(--ease);}
.footer-list a:hover{color:var(--brand);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--border);
  display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--text-3);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}
.footer-bottom p{max-width:70em;}

/* 回到顶部 */
.to-top{
  position:fixed;right:16px;bottom:calc(132px + env(safe-area-inset-bottom));z-index:93;
  width:42px;height:42px;border-radius:12px;background:#fff;border:1px solid var(--border);
  box-shadow:var(--sh-md);display:flex;align-items:center;justify-content:center;color:var(--brand);
  opacity:0;pointer-events:none;transition:opacity .2s var(--ease),transform .2s var(--ease);
}
@media (min-width:1024px){.to-top{bottom:96px;right:28px;}}
.to-top.is-visible{opacity:1;pointer-events:auto;}
.to-top:hover{transform:translateY(-3px);}

/* roulang page: article */
:root{
  --c-primary:#0E4F6B;
  --c-primary-dark:#0B4258;
  --c-primary-light:#E6F1F6;
  --c-accent:#12A594;
  --c-action:#EE6C1F;
  --c-action-dark:#D95F15;
  --bg:#F5F8FA;
  --card:#FFFFFF;
  --surface:#EEF4F7;
  --line:#DFE8ED;
  --text-1:#12212B;
  --text-2:#4A5E6B;
  --text-3:#8095A1;
  --success:#1F8A5B;
  --warn:#C77700;
  --danger:#C0392B;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-hero:18px;
  --sh-sm:0 1px 2px rgba(14,79,107,.06);
  --sh-md:0 6px 18px rgba(14,79,107,.08);
  --sh-lg:0 16px 40px rgba(14,79,107,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text-1);
  background:var(--bg);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding-left:1.2em}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 16px}
@media(min-width:768px){.container{padding:0 24px}}
@media(min-width:1024px){.container{padding:0 32px}}
@media(min-width:1440px){:root{--container:1280px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-sm)}
.nav{display:flex;align-items:center;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{
  width:28px;height:28px;border-radius:9px;
  background:var(--c-primary);color:#fff;
  display:grid;place-items:center;
  font-size:15px;font-weight:800;line-height:1;
}
.brand__text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--text-1)}
.nav__links{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav__link{
  position:relative;font-size:15px;color:var(--text-2);
  padding:6px 0;transition:color .18s var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav__link:hover{color:var(--c-primary)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link.is-active{color:var(--c-primary);font-weight:600}
.nav__link.is-active::after{transform:scaleX(1)}
.nav__side{display:flex;align-items:center;gap:16px;flex-shrink:0}
.nav__text-link{font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:6px;transition:color .18s var(--ease)}
.nav__text-link i{transition:transform .18s var(--ease)}
.nav__text-link:hover{color:var(--c-primary)}
.nav__text-link:hover i{transform:translateX(4px)}
@media(max-width:1023px){
  .nav__links{display:none}
  .nav__text-link{display:none}
  .nav__side{margin-left:auto}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{background:var(--c-action);color:#fff;box-shadow:var(--sh-sm)}
.btn--primary:hover{background:var(--c-action-dark);transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn--primary:active{transform:translateY(1px);box-shadow:var(--sh-sm)}
.btn--ghost{background:#fff;border-color:var(--c-primary);color:var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary-light);transform:translateY(-1px)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:9px}
.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary)}
.link-arrow i{transition:transform .18s var(--ease)}
.link-arrow:hover i{transform:translateX(4px)}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1.6;
  background:var(--c-primary-light);color:var(--c-primary-dark);
}
.badge--accent{background:rgba(18,165,148,.12);color:#0d7d70}

/* ---------- 文章页头部 ---------- */
.article-hero{padding:28px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.breadcrumb a{color:var(--text-2);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb span.sep{color:var(--line)}
.article-head{padding:28px 0 8px;max-width:860px}
.article-title{
  font-size:28px;line-height:1.35;font-weight:800;letter-spacing:-.01em;
  margin:16px 0 18px;color:var(--text-1);
}
@media(min-width:768px){.article-title{font-size:34px}}
@media(min-width:1280px){.article-title{font-size:40px}}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13px;color:var(--text-3)}
.article-meta__item{display:inline-flex;align-items:center;gap:7px}
.article-meta__item i{color:var(--c-accent)}
.article-cover{
  margin:28px 0 0;border-radius:var(--r-hero);overflow:hidden;
  background:var(--surface);box-shadow:var(--sh-md);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
.article-cover figcaption{font-size:13px;color:var(--text-3);text-align:center;padding:10px 16px}

/* ---------- 正文排版 ---------- */
.article-section{padding:44px 0 0}
.article-layout{max-width:820px;margin:0 auto}
.article-body{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 22px;box-shadow:var(--sh-sm);
  font-size:16px;line-height:1.9;color:#243541;
}
@media(min-width:768px){.article-body{padding:40px 44px}}
.article-body>*:first-child{margin-top:0}
.article-body h2{
  font-size:22px;line-height:1.4;font-weight:700;letter-spacing:-.01em;
  color:var(--text-1);margin:40px 0 16px;padding-left:14px;
  border-left:4px solid var(--c-primary);
}
@media(min-width:768px){.article-body h2{font-size:26px}}
.article-body h3{font-size:18px;font-weight:700;color:var(--text-1);margin:28px 0 12px}
.article-body p{margin:0 0 1.2em}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--c-action)}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.4em}
.article-body li{margin-bottom:.5em}
.article-body ul li::marker{color:var(--c-accent)}
.article-body ol li::marker{color:var(--c-primary);font-weight:700}
.article-body img{border-radius:var(--r-img);margin:24px auto;box-shadow:var(--sh-sm)}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--c-primary-light);
  border-left:4px solid var(--c-primary);border-radius:0 var(--r-img) var(--r-img) 0;
  color:var(--text-2);font-size:15px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--surface);font-weight:700;color:var(--text-1);white-space:nowrap}
.article-body code{
  background:var(--surface);border:1px solid var(--line);border-radius:6px;
  padding:2px 6px;font-size:14px;color:var(--c-primary-dark);
}
.article-body pre{
  background:#F3F6F8;border:1px solid var(--line);border-radius:var(--r-img);
  padding:16px;overflow-x:auto;font-size:14px;line-height:1.7;margin:22px 0;
}
.article-body pre code{background:none;border:none;padding:0}
.article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0}

/* ---------- 空态 ---------- */
.empty-state{
  text-align:center;padding:48px 20px;background:var(--surface);
  border:1px dashed var(--line);border-radius:var(--r-card);
}
.empty-state i{font-size:32px;color:var(--text-3)}
.empty-state p{margin:14px 0 20px;color:var(--text-2);font-size:15px}

/* ---------- 标签行 ---------- */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:28px}
.tag-row__label{font-size:13px;color:var(--text-3);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:13px;color:var(--text-2);
  transition:all .18s var(--ease);
}
.tag:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-light)}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0}
@media(min-width:768px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:96px 0}}
.section--tight{padding:40px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.section-head h2{font-size:22px;font-weight:800;letter-spacing:-.01em}
@media(min-width:768px){.section-head h2{font-size:26px}}
.section-head p{margin-top:8px;font-size:14px;color:var(--text-2)}

/* ---------- 相关推荐卡片 ---------- */
.card-grid{display:grid;gap:24px;grid-template-columns:1fr}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-lg)}
.card__media{background:var(--surface);aspect-ratio:16/9;overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover}
.card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1}
.card__title{font-size:17px;font-weight:700;line-height:1.5;color:var(--text-1);transition:color .18s var(--ease)}
.card:hover .card__title{color:var(--c-primary)}
.card__desc{font-size:14px;color:var(--text-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--text-3)}
.card__foot i{color:var(--c-primary);transition:transform .18s var(--ease)}
.card:hover .card__foot i{transform:translateX(4px)}

/* ---------- CTA 区 ---------- */
.cta-band{
  background:var(--c-primary);border-radius:var(--r-hero);
  padding:36px 24px;color:#fff;display:flex;flex-wrap:wrap;
  align-items:center;justify-content:space-between;gap:24px;
  box-shadow:var(--sh-lg);
}
@media(min-width:768px){.cta-band{padding:48px 48px}}
.cta-band h2{font-size:22px;font-weight:800;letter-spacing:-.01em;color:#fff}
@media(min-width:768px){.cta-band h2{font-size:28px}}
.cta-band p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.82);max-width:560px}
.cta-band__actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.cta-band .link-arrow{color:#fff}
.cta-band .btn--ghost{background:transparent;border-color:rgba(255,255,255,.6);color:#fff}
.cta-band .btn--ghost:hover{background:rgba(255,255,255,.12)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:56px 0 0;margin-top:64px}
@media(min-width:1024px){.site-footer{padding:72px 0 0;margin-top:96px}}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr 1fr}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{grid-column:1/-1}
@media(min-width:1024px){.footer-brand{grid-column:auto}}
.footer-brand__top{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:340px;line-height:1.8}
.site-footer h4{font-size:14px;font-weight:700;color:var(--text-1);margin:0 0 16px}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-list a,.footer-list span{font-size:14px;color:var(--text-2);transition:color .18s var(--ease)}
.footer-list a:hover{color:var(--c-primary)}
.socials{display:flex;gap:10px;margin-top:18px}
.socials a{
  width:36px;height:36px;border-radius:10px;background:#fff;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--text-2);transition:all .18s var(--ease);
}
.socials a:hover{color:var(--c-primary);border-color:var(--c-primary);transform:translateY(-2px)}
.footer-bottom{
  margin-top:44px;border-top:1px solid var(--line);padding:20px 0 28px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
}
.footer-bottom p{margin:0;font-size:13px;color:var(--text-3)}

/* ---------- 移动端底部 Tab ---------- */
.mobile-tab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 18px rgba(14,79,107,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab__item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:56px;font-size:10.5px;color:var(--text-3);position:relative;
  transition:color .18s var(--ease);
}
.mobile-tab__item i{font-size:19px}
.mobile-tab__item::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%) scaleX(0);
  width:28px;height:2px;background:var(--c-primary);transition:transform .18s var(--ease);
}
.mobile-tab__item.is-active{color:var(--c-primary);font-weight:600}
.mobile-tab__item.is-active::before{transform:translateX(-50%) scaleX(1)}
@media(max-width:1023px){
  .mobile-tab{display:flex}
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:18px;bottom:28px;z-index:65;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--c-primary);display:grid;place-items:center;
  box-shadow:var(--sh-md);cursor:pointer;opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),visibility .22s var(--ease),transform .18s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-2px);box-shadow:var(--sh-lg)}
@media(max-width:1023px){.to-top{bottom:calc(74px + env(safe-area-inset-bottom));right:14px}}

/* roulang page: category1 */
:root{
  --primary:#0E4F6B;
  --primary-dark:#0B4258;
  --primary-light:#E6F1F6;
  --accent:#12A594;
  --action:#EE6C1F;
  --action-dark:#D75E14;
  --bg:#F5F8FA;
  --surface:#FFFFFF;
  --surface-2:#EEF4F7;
  --border:#DFE8ED;
  --text:#12212B;
  --text-2:#4A5E6B;
  --text-3:#8095A1;
  --success:#1F8A5B;
  --warn:#C77700;
  --danger:#C0392B;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-hero:18px;
  --shadow-sm:0 1px 2px rgba(14,79,107,.06);
  --shadow-md:0 6px 18px rgba(14,79,107,.08);
  --shadow-lg:0 16px 40px rgba(14,79,107,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  letter-spacing:0;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-0.01em;line-height:1.35;font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;
  padding:10px 16px;border-radius:0 0 var(--radius-btn) 0;z-index:999;
}
.skip-link:focus{left:0;}

/* 容器 */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 16px;}
@media (min-width:768px){.container{padding:0 24px;}}
@media (min-width:1024px){.container{padding:0 32px;}}
@media (min-width:1440px){:root{--container:1280px;}}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--surface);
  border-bottom:1px solid var(--border);
  transition:box-shadow 180ms var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-sm);}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:28px;height:28px;border-radius:9px;
  background:linear-gradient(160deg,var(--primary),var(--primary-dark));
  color:#fff;font-size:15px;font-weight:800;
  display:inline-flex;align-items:center;justify-content:center;
  letter-spacing:0;
}
.brand__text{
  font-size:17px;font-weight:700;color:var(--primary);
  white-space:nowrap;
}
.nav__links{display:none;align-items:center;gap:28px;}
.nav__link{
  position:relative;font-size:15px;color:var(--text-2);
  padding:22px 0;transition:color 180ms var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--primary);border-radius:2px;
  transform:scaleX(0);transform-origin:center;
  transition:transform 200ms var(--ease);
}
.nav__link:hover{color:var(--primary);}
.nav__link:hover::after{transform:scaleX(1);}
.nav__link.is-active{color:var(--primary);font-weight:600;}
.nav__link.is-active::after{transform:scaleX(1);}
.nav__side{display:flex;align-items:center;gap:16px;}
.nav__text-link{
  display:none;font-size:14px;color:var(--text-2);
  transition:color 180ms var(--ease);
}
.nav__text-link i{margin-left:4px;transition:transform 180ms var(--ease);}
.nav__text-link:hover{color:var(--primary);}
.nav__text-link:hover i{transform:translateX(4px);}
@media (min-width:1024px){
  .nav__links{display:flex;}
  .nav__text-link{display:inline-flex;align-items:center;}
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  cursor:pointer;transition:all 180ms var(--ease);white-space:nowrap;
}
.btn--primary{background:var(--action);color:#fff;box-shadow:var(--shadow-sm);}
.btn--primary:hover{background:var(--action-dark);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{background:var(--surface);color:var(--primary);border-color:var(--primary);}
.btn--ghost:hover{background:var(--primary-light);transform:translateY(-1px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:15px;font-weight:600;
  transition:color 180ms var(--ease);
}
.text-link i{transition:transform 180ms var(--ease);}
.text-link:hover{color:var(--primary-dark);text-decoration:underline;text-underline-offset:3px;}
.text-link:hover i{transform:translateX(4px);}

/* 面包屑 */
.crumb-bar{background:var(--surface-2);border-bottom:1px solid var(--border);}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:14px 0;font-size:13px;color:var(--text-3);
}
.breadcrumb a{color:var(--text-2);transition:color 180ms var(--ease);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb i{font-size:10px;color:var(--text-3);}
.breadcrumb [aria-current]{color:var(--primary);font-weight:600;}

/* 页面首屏 */
.page-hero{
  background:var(--surface);
  border-bottom:1px solid var(--border);
  padding:40px 0 44px;
}
.page-hero__inner{display:grid;gap:28px;}
.page-hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--primary-light);color:var(--primary);
  font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;
  margin-bottom:16px;
}
.page-hero h1{
  font-size:26px;font-weight:800;color:var(--text);
  max-width:760px;
}
.page-hero .lead{
  margin-top:14px;font-size:17px;color:var(--text-2);
  max-width:720px;
}
.page-hero .hero-meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;
}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;color:var(--primary);
  background:var(--surface-2);border:1px solid var(--border);
  padding:5px 12px;border-radius:999px;
}
.chip--accent{color:#0B7C71;background:#E4F5F2;border-color:#C9E9E4;}
.hero-figure{
  border-radius:var(--radius-hero);overflow:hidden;
  background:var(--surface-2);box-shadow:var(--shadow-md);
  aspect-ratio:16/10;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
@media (min-width:1024px){
  .page-hero{padding:56px 0 60px;}
  .page-hero__inner{grid-template-columns:7fr 5fr;align-items:center;gap:44px;}
  .page-hero h1{font-size:40px;}
  .page-hero .lead{font-size:18px;}
}

/* 主栅格：左内容 + 右粘性侧栏 */
.layout{
  display:grid;gap:32px;
  padding:40px 0 56px;
}
@media (min-width:1024px){
  .layout{grid-template-columns:8fr 4fr;gap:40px;padding:64px 0 80px;align-items:start;}
}
.content-col{min-width:0;}
.side-col{display:grid;gap:20px;}
@media (min-width:1024px){
  .side-col{position:sticky;top:88px;}
}

/* 板块 */
.section{margin-bottom:56px;}
.section:last-child{margin-bottom:0;}
.section__head{margin-bottom:22px;}
.section__head h2{
  font-size:24px;font-weight:700;color:var(--text);
  padding-left:14px;position:relative;
}
.section__head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
  border-radius:2px;background:var(--primary);
}
.section__head p{margin-top:10px;font-size:15px;color:var(--text-2);}
@media (min-width:1024px){
  .section{margin-bottom:72px;}
  .section__head h2{font-size:28px;}
}

/* 步骤 */
.steps{display:grid;gap:16px;}
.step{
  display:grid;grid-template-columns:48px 1fr;gap:16px;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:20px;
  box-shadow:var(--shadow-sm);
  transition:box-shadow 180ms var(--ease),transform 180ms var(--ease);
}
.step:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);}
.step__num{
  width:48px;height:48px;border-radius:12px;
  background:var(--primary-light);color:var(--primary);
  font-size:16px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
}
.step__body h3{font-size:18px;font-weight:700;margin-bottom:6px;}
.step__body p{font-size:15px;color:var(--text-2);}

/* 设备卡 */
.device-grid{display:grid;gap:20px;}
@media (min-width:768px){.device-grid{grid-template-columns:repeat(3,1fr);}}
.card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:box-shadow 180ms var(--ease),transform 180ms var(--ease);
  display:flex;flex-direction:column;
}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);}
.card__media{aspect-ratio:16/9;background:var(--surface-2);}
.card__media img{width:100%;height:100%;object-fit:cover;}
.card__body{padding:20px;display:flex;flex-direction:column;gap:8px;}
@media (min-width:1024px){.card__body{padding:24px;}}
.card__body h3{font-size:18px;font-weight:700;}
.card__body p{font-size:14px;color:var(--text-2);}
.card__icon{
  width:40px;height:40px;border-radius:11px;
  background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:16px;
}

/* 核对清单 */
.check-list{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-sm);
}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 0;border-bottom:1px dashed var(--border);
  font-size:15px;color:var(--text-2);
}
.check-list li:last-child{border-bottom:0;padding-bottom:0;}
.check-list li:first-child{padding-top:0;}
.check-list i{color:var(--success);font-size:15px;margin-top:5px;}
.check-list strong{color:var(--text);font-weight:600;}

/* 提示条 */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--primary-light);border:1px solid #CFE4EE;
  border-radius:var(--radius-card);padding:18px 20px;
  margin-top:22px;
}
.notice i{color:var(--primary);font-size:18px;margin-top:3px;}
.notice p{font-size:14px;color:var(--text-2);}
.notice strong{color:var(--primary);}

/* FAQ */
.faq{display:grid;gap:12px;}
.faq__item{
  background:var(--surface);border:1px solid var(--border);
  border-radius:12px;padding:0 20px;overflow:hidden;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.faq__item.is-open{border-color:#CFE4EE;box-shadow:var(--shadow-sm);}
.faq__head{margin:0;font-size:16px;}
.faq__q{
  width:100%;background:none;border:0;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;text-align:left;font-size:16px;font-weight:600;color:var(--text);
  transition:color 180ms var(--ease);
}
.faq__q:hover{color:var(--primary);}
.faq__icon{
  position:relative;flex-shrink:0;width:18px;height:18px;
}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--primary);border-radius:2px;
  transform:translate(-50%,-50%);
  transition:transform 180ms var(--ease),opacity 180ms var(--ease);
}
.faq__icon::before{width:14px;height:2px;}
.faq__icon::after{width:2px;height:14px;}
.faq__item.is-open .faq__icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq__a{
  max-height:0;overflow:hidden;
  transition:max-height 280ms var(--ease),padding 280ms var(--ease);
}
.faq__item.is-open .faq__a{max-height:420px;padding-bottom:20px;}
.faq__a p{font-size:15px;color:var(--text-2);}
.faq__item.is-open .faq__q{color:var(--primary);}

/* CTA 条 */
.cta-band{
  background:linear-gradient(160deg,var(--primary),var(--primary-dark));
  border-radius:var(--radius-hero);padding:32px 24px;
  color:#fff;display:grid;gap:20px;
  box-shadow:var(--shadow-md);
}
.cta-band h2{font-size:22px;color:#fff;}
.cta-band p{font-size:15px;color:rgba(255,255,255,.82);margin-top:10px;max-width:560px;}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-band .btn--primary{box-shadow:none;}
.cta-band .btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.cta-band .btn--ghost:hover{background:rgba(255,255,255,.12);}
@media (min-width:1024px){
  .cta-band{padding:40px 36px;grid-template-columns:1fr auto;align-items:center;gap:32px;}
  .cta-band h2{font-size:26px;}
}

/* 侧栏卡 */
.side-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:22px;box-shadow:var(--shadow-sm);
}
.side-card h4{
  font-size:15px;font-weight:700;color:var(--text);
  padding-bottom:12px;border-bottom:1px solid var(--border);margin-bottom:12px;
}
.side-nav{display:grid;gap:4px;}
.side-nav a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:10px;font-size:14px;color:var(--text-2);
  transition:background 180ms var(--ease),color 180ms var(--ease);
}
.side-nav a i{font-size:11px;opacity:.6;transition:transform 180ms var(--ease);}
.side-nav a:hover{background:var(--surface-2);color:var(--primary);}
.side-nav a:hover i{transform:translateX(3px);}
.side-nav a.is-active{background:var(--primary-light);color:var(--primary);font-weight:600;}
.side-cta{background:var(--surface-2);border-color:#CFE4EE;}
.side-cta p{font-size:14px;color:var(--text-2);margin-bottom:16px;}
.side-facts{display:grid;gap:12px;}
.side-fact{
  display:flex;gap:12px;align-items:flex-start;
  font-size:14px;color:var(--text-2);
}
.side-fact i{color:var(--accent);margin-top:4px;}

/* 页尾 CTA */
.footer-cta{
  background:var(--surface);border-top:1px solid var(--border);
  padding:56px 0;
}
.footer-cta__inner{
  display:grid;gap:24px;text-align:center;justify-items:center;
}
.footer-cta h2{font-size:24px;}
.footer-cta p{font-size:15px;color:var(--text-2);max-width:620px;}
.footer-cta__actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}
@media (min-width:1024px){.footer-cta h2{font-size:30px;}}

/* 页脚 */
.site-footer{
  background:var(--surface-2);border-top:1px solid var(--border);
  padding:56px 0 28px;
}
.footer-grid{display:grid;gap:32px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand__top{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:340px;}
.socials{display:flex;gap:10px;margin-top:16px;}
.socials a{
  width:36px;height:36px;border-radius:10px;
  background:var(--surface);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-2);font-size:14px;
  transition:all 180ms var(--ease);
}
.socials a:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-2px);}
.site-footer h4{
  font-size:14px;font-weight:700;color:var(--text);margin-bottom:14px;
}
.footer-list{display:grid;gap:10px;}
.footer-list a,.footer-list span{
  font-size:14px;color:var(--text-2);
  transition:color 180ms var(--ease);
}
.footer-list a:hover{color:var(--primary);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--border);
  display:grid;gap:8px;font-size:13px;color:var(--text-3);
}

/* 移动端底部 Tab */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:120;
  display:flex;background:var(--surface);
  border-top:1px solid var(--border);
  box-shadow:0 -6px 18px rgba(14,79,107,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab__item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:4px;height:56px;font-size:10.5px;color:var(--text-3);
  position:relative;transition:color 180ms var(--ease);
}
.mobile-tab__item i{font-size:18px;}
.mobile-tab__item.is-active{color:var(--primary);font-weight:600;}
.mobile-tab__item.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;background:var(--primary);
}
@media (min-width:1024px){.mobile-tab{display:none;}}

/* 回到顶部 */
.to-top{
  position:fixed;right:16px;bottom:76px;z-index:110;
  width:44px;height:44px;border-radius:12px;
  background:var(--surface);border:1px solid var(--border);
  color:var(--primary);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-md);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:all 200ms var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--primary-light);}
@media (min-width:1024px){.to-top{bottom:28px;right:28px;}}

/* 移动端底部留白 */
@media (max-width:1023px){
  body{padding-bottom:56px;}
}

/* roulang page: category2 */
:root{
  --c-primary:#0E4F6B;
  --c-primary-dark:#0B4258;
  --c-primary-light:#E6F1F6;
  --c-accent:#12A594;
  --c-action:#EE6C1F;
  --c-action-dark:#D75F16;
  --c-bg:#F5F8FA;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF4F7;
  --c-border:#DFE8ED;
  --c-text:#12212B;
  --c-text-2:#4A5E6B;
  --c-text-3:#8095A1;
  --c-success:#1F8A5B;
  --c-warn:#C77700;
  --c-danger:#C0392B;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-hero:18px;
  --sh-sm:0 1px 2px rgba(14,79,107,.06);
  --sh-md:0 6px 18px rgba(14,79,107,.08);
  --sh-lg:0 16px 40px rgba(14,79,107,.10);
  --tr:180ms cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.8;color:var(--c-text);
  background:var(--c-bg);
  padding-bottom:110px;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{background:none;border:0}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.35}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 32px;width:100%}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--c-primary);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--c-border);transition:box-shadow var(--tr)}
.site-header.is-scrolled{box-shadow:var(--sh-sm)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:9px;background:var(--c-primary);color:#fff;font-size:15px;font-weight:700;line-height:1}
.brand__text{font-size:17px;font-weight:700;color:var(--c-primary);letter-spacing:-.01em}
.nav__links{display:flex;align-items:center;gap:28px}
.nav__link{position:relative;font-size:15px;color:var(--c-text-2);padding:6px 0;transition:color var(--tr);white-space:nowrap}
.nav__link::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform var(--tr)}
.nav__link:hover{color:var(--c-primary)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link.is-active{color:var(--c-primary);font-weight:600}
.nav__link.is-active::after{transform:scaleX(1)}
.nav__side{display:flex;align-items:center;gap:20px;flex-shrink:0}
.nav__text-link{font-size:14px;color:var(--c-text-2);display:inline-flex;align-items:center;gap:6px;transition:color var(--tr)}
.nav__text-link i{transition:transform var(--tr)}
.nav__text-link:hover{color:var(--c-primary)}
.nav__text-link:hover i{transform:translateX(4px)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;cursor:pointer;transition:background var(--tr),color var(--tr),transform var(--tr),box-shadow var(--tr),border-color var(--tr);white-space:nowrap}
.btn--sm{height:40px;padding:0 18px;font-size:14px}
.btn--primary{background:var(--c-action);color:#fff;box-shadow:0 4px 12px rgba(238,108,31,.22)}
.btn--primary:hover{background:var(--c-action-dark);transform:translateY(-1px);box-shadow:0 8px 20px rgba(238,108,31,.28)}
.btn--primary:active{transform:translateY(1px)}
.btn--secondary{background:#fff;color:var(--c-primary);border:1.5px solid var(--c-primary)}
.btn--secondary:hover{background:var(--c-primary-light);transform:translateY(-1px)}
.btn--secondary:active{transform:translateY(1px)}
.btn--ghost{background:var(--c-surface-2);color:var(--c-primary);border:1px solid var(--c-border)}
.btn--ghost:hover{background:var(--c-primary-light);border-color:var(--c-primary)}
.btn[disabled]{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary)}
.text-link i{transition:transform var(--tr)}
.text-link:hover i{transform:translateX(4px)}
.text-link:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- 通用 ---------- */
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--surface{background:var(--c-surface-2)}
.section--white{background:#fff}
.section-head{max-width:760px;margin-bottom:48px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-accent);letter-spacing:.04em;text-transform:none;margin-bottom:12px}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--c-accent);border-radius:2px}
.section-head h2{font-size:30px;color:var(--c-text);margin-bottom:14px}
.section-head p{color:var(--c-text-2);font-size:16px}
.badge{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:600;background:var(--c-primary-light);color:var(--c-primary)}
.badge--accent{background:rgba(18,165,148,.12);color:#0C8578}
.narrow{max-width:1000px;margin:0 auto}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:20px 0 0}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb a{color:var(--c-text-2);transition:color var(--tr)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:#B9C8D1}

/* ---------- 页面首屏 ---------- */
.page-hero{padding:40px 0 72px}
.page-hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.page-hero h1{font-size:44px;font-weight:800;margin-bottom:18px;color:var(--c-text)}
.page-hero__lead{font-size:17px;color:var(--c-text-2);max-width:560px;margin-bottom:28px}
.page-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.trust-row{display:flex;flex-wrap:wrap;gap:24px}
.trust-item{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--c-text-2)}
.trust-item i{color:var(--c-accent);font-size:15px}
.hero-figure{position:relative}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-hero);box-shadow:var(--sh-lg);background:var(--c-surface-2)}
.hero-float{position:absolute;left:-18px;bottom:-22px;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-md);padding:16px 18px;display:flex;gap:14px;align-items:center}
.hero-float__num{font-size:26px;font-weight:800;color:var(--c-action);line-height:1}
.hero-float__label{font-size:12px;color:var(--c-text-3);line-height:1.5}

/* ---------- 清单 ---------- */
.checklist{display:grid;gap:16px}
.check-item{display:flex;gap:18px;align-items:flex-start;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:22px 24px;box-shadow:var(--sh-sm);transition:box-shadow var(--tr),transform var(--tr)}
.check-item:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.check-item__icon{flex:0 0 42px;width:42px;height:42px;border-radius:12px;background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:17px}
.check-item h3{font-size:18px;margin-bottom:6px}
.check-item p{font-size:14.5px;color:var(--c-text-2)}

/* ---------- Z 型图文 ---------- */
.zblock{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:88px}
.zblock:last-child{margin-bottom:0}
.zblock--reverse .zblock__media{order:-1}
.zblock__text h2{font-size:28px;margin-bottom:16px}
.zblock__text>p{color:var(--c-text-2);margin-bottom:18px}
.zblock__media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:16px;box-shadow:var(--sh-md);background:var(--c-surface-2)}
.dot-list{display:grid;gap:12px;margin-top:6px}
.dot-list li{position:relative;padding-left:24px;font-size:15px;color:var(--c-text-2)}
.dot-list li::before{content:"";position:absolute;left:4px;top:11px;width:7px;height:7px;border-radius:50%;background:var(--c-accent)}
.dot-list strong{color:var(--c-text);font-weight:600}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--c-border)}
.step{position:relative;padding:32px 24px 8px;border-left:1px dashed var(--c-border)}
.step:first-child{border-left:0}
.step__num{font-size:44px;font-weight:800;line-height:1;color:rgba(14,79,107,.12);margin-bottom:12px}
.step h3{font-size:18px;margin-bottom:10px}
.step p{font-size:14.5px;color:var(--c-text-2)}

/* ---------- 对比 ---------- */
.compare-wrap{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-sm);overflow:hidden}
table.compare{width:100%;border-collapse:collapse;font-size:15px}
table.compare th,table.compare td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--c-border)}
table.compare thead th{background:var(--c-surface-2);font-size:14px;color:var(--c-primary);font-weight:700}
table.compare tbody tr:last-child td{border-bottom:0}
table.compare td:first-child{font-weight:600;color:var(--c-text)}
table.compare td{color:var(--c-text-2)}
.compare-dl{display:none}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid var(--c-border);border-radius:12px;overflow:hidden;transition:box-shadow var(--tr),border-color var(--tr)}
.faq-item[open]{box-shadow:var(--sh-md);border-left:3px solid var(--c-primary)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 22px;font-size:16.5px;font-weight:600;color:var(--c-text)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:focus-visible{outline:2px solid var(--c-primary);outline-offset:-2px}
.faq-icon{flex:0 0 26px;width:26px;height:26px;border-radius:50%;background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:13px;transition:transform var(--tr)}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-body{padding:0 22px 22px;font-size:15px;color:var(--c-text-2)}

/* ---------- CTA ---------- */
.cta-band{background:var(--c-primary);border-radius:var(--r-hero);padding:56px 48px;color:#fff;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;box-shadow:var(--sh-lg)}
.cta-band h2{font-size:28px;color:#fff;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.82);font-size:16px;max-width:560px}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-band .btn--secondary{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.cta-band .btn--secondary:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-surface-2);border-top:1px solid var(--c-border);padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand__top{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--c-text-2);max-width:340px}
.socials{display:flex;gap:12px;margin-top:20px}
.socials a{width:38px;height:38px;border-radius:10px;background:#fff;border:1px solid var(--c-border);display:flex;align-items:center;justify-content:center;color:var(--c-primary);transition:all var(--tr)}
.socials a:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary);transform:translateY(-2px)}
.site-footer h4{font-size:14px;font-weight:700;color:var(--c-text);margin-bottom:16px}
.footer-list{display:grid;gap:11px}
.footer-list a,.footer-list span{font-size:14px;color:var(--c-text-2);transition:color var(--tr)}
.footer-list a:hover{color:var(--c-primary)}
.footer-bottom{margin-top:48px;padding-top:22px;border-top:1px solid var(--c-border);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}
.footer-bottom p{font-size:13px;color:var(--c-text-3)}

/* ---------- 移动底部 Tab ---------- */
.mobile-tabs{position:fixed;left:0;right:0;bottom:0;z-index:90;display:none;background:#fff;border-top:1px solid var(--c-border);box-shadow:0 -6px 18px rgba(14,79,107,.08);height:calc(56px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}
.mobile-tabs a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:10.5px;color:var(--c-text-3);position:relative;transition:color var(--tr)}
.mobile-tabs a i{font-size:19px}
.mobile-tabs a.is-active{color:var(--c-primary);font-weight:600}
.mobile-tabs a.is-active::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:26px;height:2px;border-radius:2px;background:var(--c-primary)}

/* ---------- 底部转化条 ---------- */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:85;background:#fff;border-top:1px solid var(--c-border);box-shadow:var(--sh-md);height:72px;display:flex;align-items:center;opacity:0;transform:translateY(110%);pointer-events:none;transition:transform .3s cubic-bezier(.2,.7,.3,1),opacity .3s}
.sticky-cta.is-show{opacity:1;transform:translateY(0);pointer-events:auto}
.sticky-cta__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%}
.sticky-cta__text{font-size:14.5px;color:var(--c-text-2)}
.sticky-cta__text strong{color:var(--c-text)}
.sticky-cta__actions{display:flex;align-items:center;gap:14px}
.sticky-cta__close{width:34px;height:34px;border-radius:9px;color:var(--c-text-3);display:flex;align-items:center;justify-content:center;transition:all var(--tr)}
.sticky-cta__close:hover{background:var(--c-surface-2);color:var(--c-text)}

/* ---------- 回到顶部 ---------- */
.to-top{position:fixed;right:24px;bottom:96px;z-index:70;width:44px;height:44px;border-radius:12px;background:#fff;border:1px solid var(--c-border);color:var(--c-primary);display:flex;align-items:center;justify-content:center;box-shadow:var(--sh-md);opacity:0;transform:translateY(10px);pointer-events:none;transition:all var(--tr)}
.to-top.is-show{opacity:1;transform:translateY(0);pointer-events:auto}
.to-top:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){.container{max-width:1280px}}
@media (max-width:1279px){
  .page-hero h1{font-size:38px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav__links{display:none}
  .nav__side .nav__text-link{display:none}
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .page-hero{padding:28px 0 56px}
  .page-hero__grid{grid-template-columns:1fr;gap:36px}
  .page-hero h1{font-size:32px}
  .zblock{grid-template-columns:1fr;gap:28px;margin-bottom:64px}
  .zblock--reverse .zblock__media{order:0}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(odd){border-left:0}
  .step:nth-child(3),.step:nth-child(4){border-top:1px dashed var(--c-border)}
  .cta-band{grid-template-columns:1fr;padding:40px 32px}
  .cta-band__actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .mobile-tabs{display:grid;grid-template-columns:repeat(5,1fr)}
  body{padding-bottom:150px}
  .sticky-cta{bottom:calc(56px + env(safe-area-inset-bottom));height:64px}
  .sticky-cta__inner{gap:12px}
  .sticky-cta__text{display:none}
  .sticky-cta__actions{width:100%;justify-content:space-between}
  .sticky-cta__actions .btn{flex:1}
  .sticky-cta__actions .btn--secondary{display:none}
  .to-top{bottom:calc(136px + env(safe-area-inset-bottom));right:16px;width:40px;height:40px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .page-hero h1{font-size:28px}
  .page-hero__lead{font-size:16px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .section-head h2{font-size:24px}
  .zblock__text h2{font-size:23px}
  .hero-float{left:0;bottom:-16px}
  .steps{grid-template-columns:1fr}
  .step{border-left:0;border-top:1px dashed var(--c-border);padding:24px 0 4px}
  .step:first-child{border-top:0}
  .step:nth-child(3),.step:nth-child(4){border-top:1px dashed var(--c-border)}
  .compare-wrap{background:transparent;border:0;box-shadow:none}
  table.compare{display:none}
  .compare-dl{display:grid;gap:14px}
  .compare-dl>div{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:18px 20px;box-shadow:var(--sh-sm)}
  .compare-dl dt{font-size:15px;font-weight:700;color:var(--c-primary);margin-bottom:8px}
  .compare-dl dd{margin:0 0 6px;font-size:14.5px;color:var(--c-text-2)}
  .compare-dl dd:last-child{margin-bottom:0}
  .compare-dl dd b{color:var(--c-text);font-weight:600}
  .cta-band{padding:32px 22px;border-radius:14px}
  .cta-band h2{font-size:23px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;margin-top:32px}
  .btn{height:46px}
}
@media (max-width:479px){
  .page-hero h1{font-size:26px}
  .nav__side .btn{display:none}
  .footer-grid{grid-template-columns:1fr}
}

/* roulang page: category3 */
:root{
  --brand:#0E4F6B;
  --brand-dark:#0B4258;
  --brand-light:#E6F1F6;
  --teal:#12A594;
  --action:#EE6C1F;
  --action-dark:#D95F16;
  --bg:#F5F8FA;
  --surface:#FFFFFF;
  --surface-2:#EEF4F7;
  --border:#DFE8ED;
  --text:#12212B;
  --text-2:#4A5E6B;
  --text-3:#8095A1;
  --success:#1F8A5B;
  --warn:#C77700;
  --danger:#C0392B;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-hero:18px;
  --sh-sm:0 1px 2px rgba(14,79,107,.06);
  --sh-md:0 6px 18px rgba(14,79,107,.08);
  --sh-lg:0 16px 40px rgba(14,79,107,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sec:96px;
}
@media (max-width:1023px){:root{--sec:72px}}
@media (max-width:767px){:root{--sec:56px}}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;font-weight:700;line-height:1.35}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:var(--brand-light);color:var(--brand-dark)}

.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:300}
.skip:focus{left:0}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media (min-width:1440px){.container{max-width:1280px}}
@media (max-width:1023px){.container{padding:0 24px}}
@media (max-width:767px){.container{padding:0 16px}}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow .18s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-sm)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand__mark{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(150deg,var(--brand),var(--brand-dark));
  color:#fff;font-size:16px;font-weight:800;flex:0 0 32px;
}
.brand__text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--text)}
.nav__links{display:flex;align-items:center;gap:28px}
.nav__link{
  position:relative;font-size:15px;color:var(--text-2);padding:6px 0;
  transition:color .18s var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav__link:hover{color:var(--brand)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link.is-active{color:var(--brand);font-weight:600}
.nav__link.is-active::after{transform:scaleX(1)}
.nav__side{display:flex;align-items:center;gap:18px}
.nav__text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--text-2);
  transition:color .18s var(--ease);
}
.nav__text-link i{font-size:12px;transition:transform .18s var(--ease)}
.nav__text-link:hover{color:var(--brand)}
.nav__text-link:hover i{transform:translateX(4px)}
@media (max-width:1023px){
  .nav__links{display:none}
  .nav__text-link{display:none}
}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1.5px solid transparent;cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--action);color:#fff;box-shadow:0 4px 12px rgba(238,108,31,.22)}
.btn--primary:hover{background:var(--action-dark);transform:translateY(-1px)}
.btn--primary:active{transform:translateY(1px);box-shadow:none}
.btn--ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn--ghost:hover{background:var(--brand-light);transform:translateY(-1px)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:9px}
.btn--link{
  height:auto;padding:0;border:0;background:transparent;color:var(--brand);
  font-size:15px;font-weight:600;gap:8px;
}
.btn--link i{font-size:13px;transition:transform .18s var(--ease)}
.btn--link:hover i{transform:translateX(4px)}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}
@media (max-width:767px){.btn{height:46px;padding:0 20px}}

/* ============ breadcrumb ============ */
.crumb-bar{background:var(--surface-2);border-bottom:1px solid var(--border)}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);padding:12px 0;flex-wrap:wrap}
.crumb a{color:var(--text-2);transition:color .18s var(--ease)}
.crumb a:hover{color:var(--brand)}
.crumb i{font-size:10px;color:var(--text-3)}
.crumb span[aria-current]{color:var(--brand);font-weight:600}

/* ============ hero ============ */
.page-hero{
  position:relative;
  padding:56px 0 64px;
  border-bottom:1px solid var(--border);
  background:
    linear-gradient(180deg,rgba(255,255,255,.95),rgba(245,248,250,.97)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;background:var(--brand-light);
  color:var(--brand);font-size:12.5px;font-weight:600;margin-bottom:18px;
}
.page-hero h1{font-size:40px;font-weight:800;line-height:1.3;max-width:16em}
.hero-sub{margin-top:16px;font-size:17px;color:var(--text-2);max-width:30em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-trust{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:28px}
.hero-trust li{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-2)}
.hero-trust i{color:var(--teal);font-size:14px}
.hero-media{
  border-radius:var(--r-hero);overflow:hidden;box-shadow:var(--sh-lg);
  background:var(--surface-2);position:relative;
}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .page-hero h1{font-size:32px}
}
@media (max-width:767px){
  .page-hero{padding:36px 0 44px}
  .page-hero h1{font-size:27px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{flex:1 1 auto}
}

/* ============ section base ============ */
.section{padding:var(--sec) 0}
.section--tint{background:var(--surface-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head h2{font-size:29px}
.sec-head p{margin-top:14px;color:var(--text-2);font-size:16px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;background:#fff;border:1px solid var(--border);
  color:var(--brand);font-size:12px;font-weight:600;letter-spacing:.02em;margin-bottom:14px;
}
@media (max-width:767px){.sec-head{margin-bottom:32px}.sec-head h2{font-size:23px}}

/* ============ timeline ============ */
.timeline{position:relative;max-width:960px;margin:0 auto;padding:8px 0 0}
.timeline::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;
  background:var(--border);
}
.tl-node{position:relative;width:50%;margin-bottom:36px}
.tl-node:nth-child(odd){margin-right:auto;padding-right:48px}
.tl-node:nth-child(even){margin-left:auto;padding-left:48px}
.tl-node::before{
  content:"";position:absolute;top:30px;width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--teal);z-index:2;
}
.tl-node:nth-child(odd)::before{right:-7px}
.tl-node:nth-child(even)::before{left:-7px}
.tl-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
  transition:box-shadow .18s var(--ease),transform .18s var(--ease);
}
.tl-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px)}
.tl-card__top{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.tl-num{
  display:inline-grid;place-items:center;width:40px;height:40px;border-radius:11px;
  background:var(--brand-light);color:var(--brand);font-weight:800;font-size:15px;flex:0 0 40px;
}
.tl-card h3{font-size:18px}
.tl-card p{color:var(--text-2);font-size:15px;margin-top:2px}
.tl-card ul{margin-top:12px;display:grid;gap:8px}
.tl-card li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text-2)}
.tl-card li::before{
  content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--teal);
}
@media (max-width:767px){
  .timeline::before{left:7px}
  .tl-node{width:100%;margin:0 0 28px 0;padding:0 0 0 36px}
  .tl-node:nth-child(odd),.tl-node:nth-child(even){margin:0 0 28px 0;padding:0 0 0 36px}
  .tl-node:nth-child(odd)::before,.tl-node:nth-child(even)::before{left:0;right:auto;top:26px}
  .tl-card{padding:20px}
}

/* ============ mid CTA ============ */
.cta-mid{padding:0 0 var(--sec)}
.cta-mid__inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  background:var(--brand-light);border:1px solid #d3e5ee;border-radius:16px;
  padding:32px 36px;
}
.cta-mid h2{font-size:23px;color:var(--brand-dark)}
.cta-mid p{margin-top:10px;color:var(--text-2);font-size:15px;max-width:52em}
@media (max-width:767px){
  .cta-mid__inner{flex-direction:column;align-items:flex-start;padding:24px 20px;gap:20px}
  .cta-mid h2{font-size:20px}
}

/* ============ risk grid ============ */
.risk-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.risk-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
  transition:box-shadow .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
.risk-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);border-color:#cfe1ea}
.risk-card__icon{
  width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
  background:var(--surface-2);color:var(--brand);font-size:17px;margin-bottom:16px;
}
.risk-card h3{font-size:17px;margin-bottom:8px}
.risk-card p{font-size:14.5px;color:var(--text-2)}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;
  font-size:12px;font-weight:600;
}
.badge--warn{background:#FDF1E3;color:var(--warn)}
.badge--ok{background:#E7F5EE;color:var(--success)}
.risk-card__tag{margin-bottom:12px}
@media (max-width:1023px){.risk-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.risk-grid{grid-template-columns:1fr;gap:16px}}

/* ============ protect cards ============ */
.protect-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.protect-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-sm);display:flex;flex-direction:column;gap:10px;
  transition:box-shadow .18s var(--ease),transform .18s var(--ease);
}
.protect-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.protect-card i{color:var(--teal);font-size:20px}
.protect-card h3{font-size:16.5px}
.protect-card p{font-size:14px;color:var(--text-2)}
@media (max-width:1023px){.protect-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.protect-grid{grid-template-columns:1fr}}

/* ============ split block ============ */
.split__grid{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center}
.split__media{border-radius:16px;overflow:hidden;box-shadow:var(--sh-lg);background:var(--surface-2)}
.split__media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.split__body h2{font-size:27px;margin-bottom:16px}
.split__body > p{color:var(--text-2);font-size:16px}
.check-list{margin-top:22px;display:grid;gap:14px}
.check-list li{display:flex;gap:12px;font-size:15px;color:var(--text-2)}
.check-list i{color:var(--teal);font-size:15px;margin-top:6px;flex:0 0 auto}
.check-list strong{color:var(--text);font-weight:600}
@media (max-width:1023px){
  .split__grid{grid-template-columns:1fr;gap:32px}
  .split__body h2{font-size:23px}
}

/* ============ FAQ ============ */
.faq{max-width:880px;margin:0 auto}
.faq-search{
  position:relative;margin-bottom:24px;
}
.faq-search i{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  color:var(--text-3);font-size:14px;
}
.faq-search input{
  width:100%;height:46px;border-radius:var(--r-btn);border:1px solid var(--border);
  background:#fff;padding:0 16px 0 42px;font-size:15px;color:var(--text);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.faq-search input::placeholder{color:var(--text-3)}
.faq-search input:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(14,79,107,.12);
}
.faq__item{
  background:#fff;border:1px solid var(--border);border-radius:12px;
  margin-bottom:12px;box-shadow:var(--sh-sm);overflow:hidden;
  transition:box-shadow .18s var(--ease);
}
.faq__item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:20px 24px;font-size:16.5px;font-weight:600;color:var(--text);
}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary:hover{color:var(--brand)}
.faq__item summary:focus-visible{outline:2px solid var(--brand);outline-offset:-4px}
.faq__item[open]{box-shadow:inset 3px 0 0 var(--brand),var(--sh-md)}
.faq__icon{position:relative;width:16px;height:16px;flex:0 0 16px;transition:transform .18s var(--ease)}
.faq__icon::before,.faq__icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
.faq__icon::before{left:0;right:0;top:7px;height:2px}
.faq__icon::after{top:0;bottom:0;left:7px;width:2px;transition:opacity .18s var(--ease)}
.faq__item[open] .faq__icon::after{opacity:0}
.faq__body{padding:0 24px 22px;color:var(--text-2);font-size:15px;line-height:1.85}
.faq__empty{display:none;text-align:center;padding:36px 24px;color:var(--text-3);font-size:14.5px;background:#fff;border:1px dashed var(--border);border-radius:12px}
.faq__empty.is-visible{display:block}
@media (max-width:640px){
  .faq__item summary{padding:16px 18px;font-size:15.5px}
  .faq__body{padding:0 18px 18px}
}

/* ============ end CTA ============ */
.cta-end{
  background:linear-gradient(160deg,var(--brand) 0%,var(--brand-dark) 100%);
  color:#fff;
}
.cta-end__inner{padding:72px 0;text-align:center;max-width:760px;margin:0 auto}
.cta-end h2{font-size:30px;color:#fff}
.cta-end p{margin-top:16px;color:rgba(255,255,255,.82);font-size:16px}
.cta-end__actions{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;align-items:center;margin-top:30px}
.cta-end .btn--link{color:#fff}
.cta-end .btn--link:hover{color:#FFD9BE}
@media (max-width:767px){
  .cta-end__inner{padding:52px 0}
  .cta-end h2{font-size:23px}
}

/* ============ footer ============ */
.site-footer{background:var(--surface-2);border-top:1px solid var(--border);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand__top{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:34em}
.site-footer h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text)}
.footer-list{display:grid;gap:10px}
.footer-list a,.footer-list span{font-size:14px;color:var(--text-2);transition:color .18s var(--ease)}
.footer-list a:hover{color:var(--brand)}
.socials{display:flex;gap:10px;margin-top:18px}
.socials a{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:#fff;border:1px solid var(--border);color:var(--brand);font-size:14px;
  transition:background-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.socials a:hover{background:var(--brand-light);transform:translateY(-2px);box-shadow:var(--sh-sm)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--border);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--text-3)}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer-brand{grid-column:1 / -1}
  .footer-bottom{flex-direction:column;margin-top:32px}
}

/* ============ mobile tabbar ============ */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:flex;
  background:#fff;border-top:1px solid var(--border);
  box-shadow:0 -6px 18px rgba(14,79,107,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar__item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:56px;font-size:10.5px;color:var(--text-3);position:relative;
  transition:color .18s var(--ease);
}
.tabbar__item i{font-size:18px}
.tabbar__item::before{
  content:"";position:absolute;top:0;left:50%;width:28px;height:2px;border-radius:2px;
  background:var(--brand);transform:translateX(-50%) scaleX(0);
  transition:transform .18s var(--ease);
}
.tabbar__item.is-active{color:var(--brand);font-weight:600}
.tabbar__item.is-active::before{transform:translateX(-50%) scaleX(1)}
@media (min-width:1024px){.tabbar{display:none}}

/* ============ desktop convert bar ============ */
.convert-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:65;display:none;
  background:#fff;border-top:1px solid var(--border);box-shadow:var(--sh-md);
  transform:translateY(120%);transition:transform .24s var(--ease);
}
.convert-bar.is-visible{transform:translateY(0)}
.convert-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.convert-bar__text{font-size:14.5px;color:var(--text-2)}
.convert-bar__text strong{color:var(--brand);font-weight:700}
.convert-bar__actions{display:flex;align-items:center;gap:12px}
.convert-bar__close{
  width:32px;height:32px;border-radius:9px;border:1px solid var(--border);background:#fff;
  color:var(--text-3);cursor:pointer;line-height:1;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.convert-bar__close:hover{color:var(--brand);border-color:var(--brand)}
@media (min-width:1024px){.convert-bar{display:block}}

/* ============ back to top ============ */
.back-top{
  position:fixed;right:20px;bottom:calc(72px + env(safe-area-inset-bottom));z-index:66;
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:#fff;border:1px solid var(--border);box-shadow:var(--sh-md);color:var(--brand);
  opacity:0;pointer-events:none;
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.back-top.is-visible{opacity:1;pointer-events:auto}
.back-top:hover{transform:translateY(-2px);box-shadow:var(--sh-lg)}

/* ============ page padding for fixed layers ============ */
main{padding-bottom:130px}
@media (max-width:1023px){main{padding-bottom:150px}}

/* skeleton / empty states */
.skeleton{background:linear-gradient(90deg,var(--surface-2) 25%,#e3ecf1 37%,var(--surface-2) 63%);background-size:400% 100%;animation:sk 1.4s ease infinite;border-radius:10px}
@keyframes sk{0%{background-position:100% 50%}100%{background-position:0 50%}}
.empty{text-align:center;padding:48px 24px;color:var(--text-3);font-size:14px;background:#fff;border:1px dashed var(--border);border-radius:var(--r-card)}

/* roulang page: category4 */
:root{
  --primary:#0E4F6B;
  --primary-dark:#0B4258;
  --primary-soft:#E6F1F6;
  --accent:#12A594;
  --action:#EE6C1F;
  --action-dark:#D9601A;
  --bg:#F5F8FA;
  --surface:#FFFFFF;
  --surface-2:#EEF4F7;
  --border:#DFE8ED;
  --text:#12212B;
  --text-2:#4A5E6B;
  --text-3:#8095A1;
  --success:#1F8A5B;
  --warn:#C77700;
  --danger:#C0392B;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-hero:18px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(14,79,107,.06);
  --sh-md:0 6px 18px rgba(14,79,107,.08);
  --sh-lg:0 16px 40px rgba(14,79,107,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --section:96px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::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:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  padding-bottom:120px;
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--text);line-height:1.35}
p{margin:0}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--primary);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;font-size:14px;
}
.skip-link:focus{left:0}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:var(--section) 0}
.section--soft{background:var(--surface-2)}
.section--plain{background:var(--surface)}
.section__head{max-width:760px;margin-bottom:44px}
.section__head--center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.08em;
  color:var(--primary);background:var(--primary-soft);
  border-radius:var(--r-pill);padding:6px 14px;margin-bottom:16px;
}
.section__head h2{font-size:clamp(22px,2.4vw,29px);margin-bottom:14px}
.section__head p{color:var(--text-2);font-size:16px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.98);
  border-bottom:1px solid var(--border);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-md)}
.nav{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{
  width:28px;height:28px;border-radius:9px;
  background:linear-gradient(140deg,var(--primary),var(--accent));
  color:#fff;font-size:15px;font-weight:800;
  display:grid;place-items:center;
}
.brand__text{font-size:17px;font-weight:700;color:var(--primary-dark);white-space:nowrap}
.nav__links{display:flex;align-items:center;gap:28px;margin:0 auto}
.nav__link{
  position:relative;font-size:15px;color:var(--text-2);
  padding:6px 0;white-space:nowrap;transition:color .18s var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav__link:hover{color:var(--primary)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link.is-active{color:var(--primary);font-weight:600}
.nav__link.is-active::after{transform:scaleX(1)}
.nav__side{display:flex;align-items:center;gap:18px;flex-shrink:0}
.nav__text-link{font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:6px;transition:color .18s var(--ease)}
.nav__text-link i{transition:transform .18s var(--ease)}
.nav__text-link:hover{color:var(--primary)}
.nav__text-link:hover i{transform:translateX(4px)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  white-space:nowrap;
}
.btn--sm{height:40px;padding:0 18px;font-size:14px}
.btn--primary{background:var(--action);color:#fff;box-shadow:0 6px 16px rgba(238,108,31,.24)}
.btn--primary:hover{background:var(--action-dark);transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn--primary:active{transform:translateY(1px);box-shadow:var(--sh-sm)}
.btn--outline{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}
.btn--outline:hover{background:var(--primary-soft);transform:translateY(-1px)}
.btn--outline:active{transform:translateY(1px)}
.btn--ghost{background:rgba(255,255,255,.14);color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn--ghost:hover{background:rgba(255,255,255,.24)}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none!important}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--primary)}
.link-arrow i{transition:transform .18s var(--ease)}
.link-arrow:hover i{transform:translateX(4px)}

/* ============ 面包屑 ============ */
.crumb{padding-top:22px}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--primary)}
.crumb li[aria-current]{color:var(--primary);font-weight:600}
.crumb i{font-size:10px;color:var(--text-3)}

/* ============ 内页 Hero ============ */
.inner-hero{background:var(--surface);padding:40px 0 72px;border-bottom:1px solid var(--border)}
.inner-hero__grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center}
.inner-hero h1{font-size:clamp(26px,3.4vw,44px);margin-bottom:18px}
.inner-hero__sub{font-size:17px;color:var(--text-2);max-width:600px;margin-bottom:26px}
.inner-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.trust-row{display:flex;flex-wrap:wrap;gap:22px}
.trust{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-2)}
.trust i{color:var(--accent);font-size:15px}
.hero-media{
  position:relative;border-radius:var(--r-hero);overflow:hidden;
  box-shadow:var(--sh-lg);background:var(--surface-2);aspect-ratio:16/10;
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.float-card{
  position:absolute;left:-18px;bottom:20px;background:#fff;border-radius:12px;
  box-shadow:var(--sh-md);padding:12px 18px;display:flex;align-items:center;gap:12px;
}
.float-card__num{font-size:24px;font-weight:800;color:var(--action);line-height:1}
.float-card__txt{font-size:12.5px;color:var(--text-2);line-height:1.5}

/* ============ 卡片与网格 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh-sm);padding:24px;
  transition:box-shadow .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
.card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);border-color:#D2E1E9}
.card__icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);font-size:18px;margin-bottom:16px;
}
.card h3{font-size:18px;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--text-2)}
.card__meta{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.tag{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  color:var(--primary);background:var(--primary-soft);
  border-radius:var(--r-pill);padding:4px 11px;
}
.tag--accent{color:#0B7C70;background:#DFF4F1}
.tag--warn{color:var(--warn);background:#FDF3E3}

/* 图文区 */
.media-block{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:48px;align-items:center}
.media-block__img{border-radius:16px;overflow:hidden;background:var(--surface-2);aspect-ratio:16/10;box-shadow:var(--sh-md)}
.media-block__img img{width:100%;height:100%;object-fit:cover}
.media-block h2{font-size:clamp(22px,2.3vw,28px);margin-bottom:16px}
.media-block p{color:var(--text-2);margin-bottom:14px}
.check-list{display:grid;gap:12px;margin-top:18px}
.check-list li{display:flex;gap:10px;font-size:15px;color:var(--text-2)}
.check-list i{color:var(--accent);margin-top:5px;font-size:14px}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:1px solid var(--border);padding-top:36px}
.step{position:relative;padding:0 24px;border-right:1px dashed var(--border)}
.step:last-child{border-right:0}
.step__num{
  font-size:40px;font-weight:800;color:rgba(14,79,107,.12);line-height:1;margin-bottom:10px;letter-spacing:-.02em;
}
.step h3{font-size:17px;margin-bottom:10px}
.step p{font-size:14.5px;color:var(--text-2);margin-bottom:16px}
.step__img{border-radius:var(--r-img);overflow:hidden;background:var(--surface-2);aspect-ratio:16/10}
.step__img img{width:100%;height:100%;object-fit:cover}

/* ============ 对比表 ============ */
.cmp-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh-md);overflow:hidden}
.cmp-table th{
  background:var(--surface-2);color:var(--primary-dark);
  font-size:14px;font-weight:700;text-align:left;padding:16px 20px;white-space:nowrap;
}
.cmp-table td{padding:16px 20px;border-top:1px solid var(--border);color:var(--text-2);font-size:15px;vertical-align:top}
.cmp-table tbody tr:hover{background:#F8FBFC}
.cmp-table td strong{color:var(--text);font-weight:600}
.cmp-def{display:none}
.cmp-note{margin-top:16px;font-size:13.5px;color:var(--text-3);display:flex;gap:8px;align-items:flex-start}
.cmp-note i{color:var(--accent);margin-top:5px}

/* ============ 结论说明 ============ */
.summary-box{
  background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--primary);
  border-radius:12px;padding:26px 28px;box-shadow:var(--sh-sm);
}
.summary-box h3{font-size:18px;margin-bottom:12px}
.summary-box p{color:var(--text-2);font-size:15.5px}
.summary-box p+p{margin-top:12px}

/* ============ FAQ ============ */
.faq{max-width:880px;margin:0 auto;display:grid;gap:14px}
.faq__item{
  background:var(--surface);border:1px solid var(--border);border-left:3px solid transparent;
  border-radius:12px;box-shadow:var(--sh-sm);padding:0 22px;
  transition:box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.faq__item:hover{box-shadow:var(--sh-md)}
.faq__item[open]{border-left-color:var(--primary);box-shadow:var(--sh-md)}
.faq__q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16.5px;font-weight:600;padding:18px 0;cursor:pointer;list-style:none;
}
.faq__q::-webkit-details-marker{display:none}
.faq__q::after{
  content:"\002B";font-size:20px;font-weight:400;color:var(--primary);
  transition:transform .18s var(--ease);flex-shrink:0;
}
.faq__item[open] .faq__q::after{content:"\2212"}
.faq__a{padding:0 0 20px;font-size:15px;color:var(--text-2);max-width:760px}

/* ============ CTA ============ */
.cta-band{
  background:var(--primary);color:#fff;border-radius:var(--r-hero);
  padding:48px;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:var(--sh-lg);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border-radius:50%;background:rgba(18,165,148,.18);
}
.cta-band h2{color:#fff;font-size:clamp(21px,2.3vw,27px);margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.82);font-size:15.5px;max-width:640px}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}
.cta-soft{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:34px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;box-shadow:var(--sh-sm);
}
.cta-soft h3{font-size:19px;margin-bottom:8px}
.cta-soft p{color:var(--text-2);font-size:15px}

/* ============ 页脚 ============ */
.site-footer{background:var(--surface-2);border-top:1px solid var(--border);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand__top{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:340px}
.socials{display:flex;gap:12px;margin-top:18px}
.socials a{
  width:36px;height:36px;border-radius:10px;background:#fff;border:1px solid var(--border);
  display:grid;place-items:center;color:var(--primary);font-size:14px;
  transition:background .18s var(--ease),transform .18s var(--ease);
}
.socials a:hover{background:var(--primary-soft);transform:translateY(-2px)}
.site-footer h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text)}
.footer-list{display:grid;gap:11px}
.footer-list a,.footer-list span{font-size:14px;color:var(--text-2);line-height:1.6}
.footer-list a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
}
.footer-bottom p{font-size:13px;color:var(--text-3)}

/* ============ 底部固定转化条 ============ */
.conv-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:#fff;border-top:1px solid var(--border);box-shadow:var(--sh-md);
  transform:translateY(115%);transition:transform .28s var(--ease);
}
.conv-bar.is-visible{transform:translateY(0)}
.conv-bar__inner{
  max-width:1200px;margin:0 auto;padding:0 32px;height:72px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.conv-bar__text{font-size:14.5px;color:var(--text-2)}
.conv-bar__text strong{color:var(--primary-dark)}
.conv-bar__actions{display:flex;align-items:center;gap:12px}
.conv-close{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  color:var(--text-3);background:var(--surface-2);flex-shrink:0;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.conv-close:hover{color:var(--text);background:#E2EBF0}

/* ============ 移动底部 Tab ============ */
.mobile-tabs{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:80;
  background:#fff;border-top:1px solid var(--border);box-shadow:0 -6px 18px rgba(14,79,107,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabs ul{display:grid;grid-template-columns:repeat(5,1fr);height:56px}
.mobile-tabs a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:10.5px;color:var(--text-3);position:relative;
}
.mobile-tabs a i{font-size:18px}
.mobile-tabs a.is-active{color:var(--primary);font-weight:600}
.mobile-tabs a.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--primary);
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:96px;z-index:75;
  width:44px;height:44px;border-radius:12px;background:#fff;border:1px solid var(--border);
  color:var(--primary);box-shadow:var(--sh-md);display:grid;place-items:center;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--primary-soft)}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  :root{--section:84px}
}
@media (max-width:1023px){
  :root{--section:72px}
  .nav__links,.nav__side .nav__text-link{display:none}
  .nav__side{margin-left:auto}
  .mobile-tabs{display:block}
  .inner-hero__grid{grid-template-columns:1fr;gap:36px}
  .media-block{grid-template-columns:1fr;gap:28px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 0;border-top:0;padding-top:0}
  .step{border-right:0;padding:24px 0;border-top:1px solid var(--border)}
  .step:nth-child(-n+2){border-top:0;padding-top:0}
  .step:nth-child(odd){padding-right:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:36px}
  body{padding-bottom:150px}
  .conv-bar{bottom:calc(56px + env(safe-area-inset-bottom))}
  .conv-bar__inner{height:64px;padding:0 20px}
  .conv-bar__text{display:none}
  .to-top{bottom:calc(56px + env(safe-area-inset-bottom) + 76px);right:16px}
}
@media (max-width:767px){
  :root{--section:56px}
  .container{padding:0 16px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .inner-hero{padding:28px 0 48px}
  .inner-hero__actions .btn{width:100%}
  .trust-row{gap:14px 20px}
  .float-card{left:12px;bottom:12px;padding:10px 14px}
  .cmp-table{display:none}
  .cmp-def{display:block}
  .cmp-def__item{padding:16px 18px;border-top:1px solid var(--border)}
  .cmp-def__item:first-child{border-top:0}
  .cmp-def dt{font-size:15.5px;font-weight:700;color:var(--text);margin-bottom:10px}
  .cmp-def dd{margin:0 0 8px;font-size:14px;color:var(--text-2);display:flex;gap:10px}
  .cmp-def dd:last-child{margin-bottom:0}
  .cmp-def dd em{font-style:normal;color:var(--text-3);min-width:66px;flex-shrink:0}
  .cta-band{padding:28px 22px;border-radius:14px}
  .cta-band__actions .btn{width:100%}
  .cta-soft{padding:24px 20px}
  .cta-soft .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
  .footer-bottom{flex-direction:column}
  .card{padding:20px}
  .to-top{display:none}
}
@media (max-width:520px){
  .brand__text{font-size:15px}
  .step{padding:20px 0}
  .step:nth-child(odd){padding-right:0}
  .mobile-tabs a{font-size:10px}
}

/* roulang page: category5 */
:root{
  --c-primary:#0E4F6B;
  --c-primary-dark:#0B4258;
  --c-primary-light:#E6F1F6;
  --c-accent:#12A594;
  --c-action:#EE6C1F;
  --c-action-dark:#D75F17;
  --c-bg:#F5F8FA;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF4F7;
  --c-border:#DFE8ED;
  --c-text:#12212B;
  --c-text-2:#4A5E6B;
  --c-text-3:#8095A1;
  --c-success:#1F8A5B;
  --c-warn:#C77700;
  --c-danger:#C0392B;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-hero:18px;
  --sh-sm:0 1px 2px rgba(14,79,107,.06);
  --sh-md:0 6px 18px rgba(14,79,107,.08);
  --sh-lg:0 16px 40px rgba(14,79,107,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  padding-bottom:120px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--c-action);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.35;color:var(--c-text);}
p{margin:0;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--c-primary);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:200;}
.skip-link:focus{left:0;color:#fff;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 16px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:#fff;
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .18s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-sm);}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:68px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand__mark{
  width:28px;height:28px;border-radius:9px;
  background:linear-gradient(180deg,var(--c-primary) 0%,var(--c-primary-dark) 100%);
  color:#fff;font-size:14px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  flex:0 0 28px;
}
.brand__text{font-size:17px;font-weight:700;color:var(--c-text);white-space:nowrap;}
.brand:hover .brand__text{color:var(--c-primary);}
.nav__links{display:flex;align-items:center;gap:28px;}
.nav__link{
  font-size:15px;color:var(--c-text-2);position:relative;padding:6px 0;white-space:nowrap;
}
.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:center;
  transition:transform .18s var(--ease);
}
.nav__link:hover{color:var(--c-primary);}
.nav__link:hover::after{transform:scaleX(1);}
.nav__link.is-active{color:var(--c-primary);font-weight:600;}
.nav__link.is-active::after{transform:scaleX(1);}
.nav__side{display:flex;align-items:center;gap:18px;flex:0 0 auto;}
.nav__text-link{font-size:14px;color:var(--c-text-2);display:inline-flex;align-items:center;gap:6px;}
.nav__text-link i{transition:transform .18s var(--ease);font-size:12px;}
.nav__text-link:hover i{transform:translateX(4px);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1.5px solid transparent;
  transition:transform .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  white-space:nowrap;
}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--primary{background:var(--c-action);color:#fff;box-shadow:var(--sh-md);}
.btn--primary:hover{background:var(--c-action-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-lg);}
.btn--primary:active{transform:translateY(1px);box-shadow:var(--sh-sm);}
.btn--ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn--ghost:hover{background:var(--c-primary-light);color:var(--c-primary);transform:translateY(-1px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--light{background:#fff;color:var(--c-primary);}
.btn--light:hover{background:var(--c-primary-light);color:var(--c-primary);transform:translateY(-1px);}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);}
.text-link i{font-size:12px;transition:transform .18s var(--ease);}
.text-link:hover i{transform:translateX(4px);}

/* ---------- badge ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  background:var(--c-primary-light);color:var(--c-primary);
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
.badge--accent{background:rgba(18,165,148,.12);color:#0C7C70;}
.badge--warn{background:rgba(199,119,0,.12);color:var(--c-warn);}

/* ---------- breadcrumb ---------- */
.breadcrumb-wrap{padding-top:20px;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);flex-wrap:wrap;}
.breadcrumb a{color:var(--c-text-2);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:var(--c-text-3);}
.breadcrumb .current{color:var(--c-primary);font-weight:600;}

/* ---------- hero ---------- */
.hero{
  padding:36px 0 56px;
  background:
    radial-gradient(circle at 88% 12%,rgba(14,79,107,.06) 0%,rgba(14,79,107,0) 46%),
    linear-gradient(180deg,#fff 0%,var(--c-bg) 100%);
}
.hero__grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center;}
.hero__copy h1{font-size:26px;margin:16px 0 0;}
.hero__sub{margin-top:16px;font-size:16px;color:var(--c-text-2);max-width:620px;}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.trust{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.trust li{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--c-border);border-radius:999px;
  padding:8px 16px;font-size:13px;color:var(--c-text-2);box-shadow:var(--sh-sm);
}
.trust i{color:var(--c-accent);font-size:13px;}
.hero__media{position:relative;}
.hero__media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-hero);box-shadow:var(--sh-lg);
  background:var(--c-surface-2);
}
.hero__float{
  position:absolute;left:-14px;bottom:-18px;
  background:#fff;border-radius:var(--r-card);box-shadow:var(--sh-lg);
  padding:14px 18px;display:flex;align-items:center;gap:12px;
  border:1px solid var(--c-border);
}
.hero__float strong{font-size:22px;color:var(--c-action);line-height:1;font-weight:800;}
.hero__float span{font-size:13px;color:var(--c-text-2);}

/* ---------- section ---------- */
.section{padding:56px 0;}
.section--alt{background:var(--c-surface-2);}
.section-head{max-width:760px;margin-bottom:34px;}
.section-head h2{font-size:24px;margin-bottom:12px;}
.section-head p{color:var(--c-text-2);font-size:15px;}
.section-head .badge{margin-bottom:14px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---------- masonry cards ---------- */
.masonry{display:grid;grid-template-columns:1fr;gap:20px;}
.mcard{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  display:flex;flex-direction:column;gap:12px;
}
.mcard:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);border-color:#CFDFE7;}
.mcard__top{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.mcard__icon{
  width:42px;height:42px;border-radius:12px;flex:0 0 42px;
  background:var(--c-primary-light);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:17px;
}
.mcard h3{font-size:18px;}
.mcard p{font-size:14px;color:var(--c-text-2);line-height:1.85;}
.mcard__meta{margin-top:auto;padding-top:8px;font-size:13px;color:var(--c-text-3);display:flex;align-items:center;gap:8px;}
.mcard--tall{padding-bottom:30px;}
.mcard--accent{background:linear-gradient(180deg,#fff 0%,#F3FAF9 100%);}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:1fr;gap:20px;}
.step{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);position:relative;overflow:hidden;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);}
.step__no{
  font-size:44px;font-weight:800;line-height:1;color:rgba(14,79,107,.12);
  letter-spacing:-.02em;
}
.step h3{font-size:18px;margin:6px 0 10px;}
.step p{font-size:14px;color:var(--c-text-2);}
.step__list{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.step__list li{font-size:13px;color:var(--c-text-2);display:flex;gap:8px;align-items:flex-start;}
.step__list i{color:var(--c-accent);font-size:11px;margin-top:7px;}

/* ---------- evidence / compare rows ---------- */
.rows{display:grid;grid-template-columns:1fr;gap:14px;}
.row{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:20px 24px;display:grid;grid-template-columns:1fr;gap:10px;
  box-shadow:var(--sh-sm);transition:box-shadow .18s var(--ease),transform .18s var(--ease);
}
.row:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.row__title{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;}
.row__title i{color:var(--c-warn);font-size:14px;}
.row__body{font-size:14px;color:var(--c-text-2);}
.row__body strong{color:var(--c-primary);font-weight:600;}
.fig-block{
  margin-top:28px;background:#fff;border:1px solid var(--c-border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);
}
.fig-block img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--c-surface-2);}
.fig-block figcaption{padding:14px 20px;font-size:13px;color:var(--c-text-3);border-top:1px solid var(--c-border);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--c-border);border-radius:12px;
  padding:0;margin-bottom:14px;box-shadow:var(--sh-sm);overflow:hidden;
  transition:box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.faq-item:hover{box-shadow:var(--sh-md);}
.faq-item[open]{border-left:3px solid var(--c-primary);box-shadow:var(--sh-md);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:18px 22px;font-size:16px;font-weight:600;color:var(--c-text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--c-primary);}
.faq__icon{position:relative;width:18px;height:18px;flex:0 0 18px;}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
  transition:transform .18s var(--ease),opacity .18s var(--ease);
}
.faq__icon::before{left:0;top:8px;width:18px;height:2px;}
.faq__icon::after{left:8px;top:0;width:2px;height:18px;}
.faq-item[open] .faq__icon::after{transform:scaleY(0);opacity:0;}
.faq-item[open] .faq__icon{transform:rotate(180deg);transition:transform .18s var(--ease);}
.faq__body{padding:0 22px 20px;font-size:15px;color:var(--c-text-2);line-height:1.85;}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(180deg,var(--c-primary) 0%,var(--c-primary-dark) 100%);
  border-radius:var(--r-hero);padding:40px 28px;color:#fff;
  box-shadow:var(--sh-lg);display:grid;gap:22px;align-items:center;
}
.cta-band h2{color:#fff;font-size:24px;}
.cta-band p{color:rgba(255,255,255,.82);font-size:15px;margin-top:12px;}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.cta-band .text-link{color:#fff;}
.cta-band .text-link:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--c-surface-2);
  border-top:1px solid var(--c-border);
  padding:56px 0 28px;
  margin-top:8px;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
.footer-brand__top{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand p{font-size:14px;color:var(--c-text-2);max-width:340px;}
.socials{display:flex;gap:10px;margin-top:18px;}
.socials a{
  width:36px;height:36px;border-radius:10px;background:#fff;border:1px solid var(--c-border);
  display:flex;align-items:center;justify-content:center;color:var(--c-primary);font-size:14px;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease);
}
.socials a:hover{transform:translateY(-2px);box-shadow:var(--sh-md);background:var(--c-primary-light);}
.site-footer h4{font-size:14px;font-weight:700;margin-bottom:14px;color:var(--c-text);}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-list a,.footer-list span{font-size:14px;color:var(--c-text-2);}
.footer-list a:hover{color:var(--c-primary);}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid var(--c-border);
  display:flex;flex-direction:column;gap:8px;
}
.footer-bottom p{font-size:13px;color:var(--c-text-3);}

/* ---------- back to top ---------- */
.back-top{
  position:fixed;right:16px;bottom:150px;z-index:90;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--c-border);
  background:#fff;color:var(--c-primary);box-shadow:var(--sh-md);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
}
.back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:var(--c-primary-light);}

/* ---------- convert bar ---------- */
.convert-bar{
  position:fixed;left:0;right:0;bottom:calc(56px + env(safe-area-inset-bottom));z-index:95;
  background:#fff;border-top:1px solid var(--c-border);box-shadow:0 -6px 18px rgba(14,79,107,.08);
  transform:translateY(140%);transition:transform .24s var(--ease);
}
.convert-bar.is-visible{transform:translateY(0);}
.convert-bar.is-closed{display:none;}
.convert-bar__inner{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding-top:10px;padding-bottom:10px;
}
.convert-bar__text{font-size:13px;color:var(--c-text-2);flex:1 1 auto;min-width:0;}
.convert-bar__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.convert-bar__close{
  width:32px;height:32px;border-radius:9px;border:1px solid var(--c-border);
  background:#fff;color:var(--c-text-3);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
}
.convert-bar__close:hover{color:var(--c-danger);border-color:var(--c-danger);}
.convert-bar .btn--ghost{display:none;}

/* ---------- mobile tabs ---------- */
.mobile-tabs{
  position:fixed;left:0;right:0;bottom:0;z-index:96;
  background:#fff;border-top:1px solid var(--c-border);
  box-shadow:0 -4px 14px rgba(14,79,107,.07);
  display:grid;grid-template-columns:repeat(5,1fr);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabs a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:56px;font-size:10px;color:var(--c-text-3);
}
.mobile-tabs a i{font-size:17px;}
.mobile-tabs a.is-active{color:var(--c-primary);font-weight:600;}
.mobile-tabs a.is-active::before{
  content:"";position:absolute;top:0;left:22%;right:22%;height:2px;border-radius:2px;background:var(--c-primary);
}

/* ---------- responsive ---------- */
@media (min-width:480px){
  .footer-bottom{flex-direction:row;justify-content:space-between;align-items:center;}
}
@media (min-width:768px){
  body{padding-bottom:132px;}
  .container{padding:0 24px;}
  .hero{padding:48px 0 72px;}
  .hero__copy h1{font-size:34px;}
  .section{padding:72px 0;}
  .section-head h2{font-size:27px;}
  .masonry{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .rows{grid-template-columns:repeat(2,1fr);}
  .cta-band{padding:52px 48px;grid-template-columns:1.4fr .9fr;justify-items:start;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;}
  .footer-bottom{flex-direction:row;justify-content:space-between;}
}
@media (min-width:1024px){
  .hero__grid{grid-template-columns:1.15fr .95fr;gap:56px;}
  .hero__copy h1{font-size:40px;}
  .section{padding:96px 0;}
  .section-head h2{font-size:30px;}
  .masonry{grid-template-columns:repeat(3,1fr);gap:24px;}
  .masonry .mcard:nth-child(2){margin-top:36px;}
  .masonry .mcard:nth-child(5){margin-top:36px;}
  .steps{grid-template-columns:repeat(3,1fr);}
  .back-top{right:28px;}
  .convert-bar{bottom:0;}
  .convert-bar__text{font-size:14px;}
  .convert-bar .btn--ghost{display:inline-flex;}
  .mobile-tabs{display:none;}
}
@media (min-width:1280px){
  :root{--container:1280px;}
}
@media (max-width:1023px){
  .nav__links{display:none;}
  .nav__text-link{display:none;}
}
@media (max-width:767px){
  .brand__text{font-size:15px;}
  .hero__float{left:8px;right:8px;bottom:-14px;justify-content:center;}
  .cta-band__actions .btn{width:100%;}
  .convert-bar__actions .btn--ghost{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}