/* roulang page: index */
:root{
  --c-primary:#2A5C97;
  --c-primary-deep:#17395F;
  --c-accent:#FF6B3D;
  --c-accent-soft:#FFEDE6;
  --c-mint:#2FB6A8;
  --c-ink:#14202C;
  --c-ink-2:#5A6B7C;
  --c-line:#E4EAF1;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-chip:#EAF1FA;
  --r-card:16px;
  --r-video:20px;
  --r-btn:12px;
  --sh-1:0 1px 2px rgba(20,45,80,.04), 0 8px 28px rgba(20,45,80,.08);
  --sh-2:0 4px 8px rgba(20,45,80,.06), 0 16px 40px rgba(20,45,80,.14);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
  --ease:cubic-bezier(.33,.1,.25,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--c-accent);}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--c-ink);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}

.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
@media (min-width:1200px){ .wrap{max-width:1240px;} }
@media (min-width:1400px){ .wrap{max-width:1320px;} }

.section{padding:72px 0;}
@media (max-width:991px){ .section{padding:56px 0;} }
@media (max-width:575px){ .section{padding:48px 0;} }

.sec-head{margin-bottom:32px;max-width:760px;}
.sec-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;background:var(--c-chip);
  color:var(--c-primary);font-size:13px;font-weight:600;letter-spacing:.02em;
}
.sec-title{font-size:clamp(22px,3vw,32px);font-weight:700;margin-top:12px;letter-spacing:-.01em;}
.sec-sub{margin-top:10px;color:var(--c-ink-2);font-size:15px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s var(--ease), background .2s var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 20px rgba(20,45,80,.08);}
.head-top{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px 0 12px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:44px;height:44px;border-radius:14px;flex-shrink:0;
  background:linear-gradient(150deg,#2A5C97,#17395F);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;letter-spacing:.02em;
  box-shadow:0 6px 16px rgba(42,92,151,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text .b-main{font-size:17px;font-weight:800;color:var(--c-ink);letter-spacing:-.01em;}
.brand-text .b-sub{font-size:12px;color:var(--c-ink-2);font-weight:500;letter-spacing:.06em;}

.head-cta{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-main{background:var(--c-accent);color:#fff;box-shadow:0 6px 18px rgba(255,107,61,.28);}
.btn-main:hover{background:#F0561F;color:#fff;transform:translateY(-1px);box-shadow:0 10px 26px rgba(255,107,61,.34);}
.btn-main:active{transform:translateY(0);box-shadow:0 4px 12px rgba(255,107,61,.24);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-line);}
.btn-ghost:hover{color:var(--c-primary);border-color:var(--c-primary);background:#F7FAFE;transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-ghost:active{transform:translateY(0);box-shadow:none;}

.nav-chips{
  display:flex;align-items:center;gap:10px;
  overflow-x:auto;padding:0 0 14px;
  scrollbar-width:none;-ms-overflow-style:none;
  scroll-snap-type:x proximity;
}
.nav-chips::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;scroll-snap-align:start;
  display:inline-flex;align-items:center;gap:7px;
  height:38px;padding:0 16px;border-radius:999px;
  background:var(--c-chip);color:#33506E;
  border:1px solid transparent;
  font-size:14px;font-weight:600;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.chip:hover{background:#DCE9F8;color:var(--c-primary);transform:translateY(-1px);}
.chip.active{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(42,92,151,.26);}
.chip.active:hover{background:var(--c-primary-deep);color:#fff;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  background:linear-gradient(180deg,#EDF3FB 0%, #F5F8FC 100%);
  padding:56px 0 64px;
  overflow:hidden;
}
.hero-grid{
  display:grid;grid-template-columns:1.05fr .95fr;
  gap:56px;align-items:center;
}
.hero-copy .hero-kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--c-line);
  color:var(--c-primary);font-size:13px;font-weight:600;
  box-shadow:var(--sh-1);
}
.hero h1{
  margin-top:20px;
  font-size:clamp(28px,4.2vw,44px);
  font-weight:800;letter-spacing:-.02em;line-height:1.28;
}
.hero h1 .hl{color:var(--c-primary);}
.hero-lead{margin-top:18px;font-size:16px;color:var(--c-ink-2);line-height:1.85;max-width:560px;}
.hero-points{margin-top:24px;display:flex;flex-wrap:wrap;gap:12px 24px;}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--c-ink);font-weight:500;}
.hero-points i{color:var(--c-mint);font-size:14px;}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:12px;}
.hero-actions .btn-main,.hero-actions .btn-ghost{height:50px;padding:0 26px;font-size:16px;}
.hero-stats{margin-top:36px;display:flex;gap:40px;flex-wrap:wrap;}
.hero-stats .stat b{display:block;font-size:24px;font-weight:800;color:var(--c-primary-deep);letter-spacing:-.01em;}
.hero-stats .stat span{font-size:13px;color:var(--c-ink-2);}

.hero-visual{position:relative;}
.hero-phone{
  position:relative;border-radius:var(--r-video);overflow:hidden;
  aspect-ratio:3/4;box-shadow:var(--sh-2);
  background:#123;
}
.hero-phone img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.hero-phone::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(23,57,95,.9) 0%,rgba(23,57,95,.45) 38%,rgba(23,57,95,0) 72%);
}
.hero-phone-body{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:28px 26px 26px;color:#fff;
}
.hero-phone-body .vp-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.28);
  font-size:12px;font-weight:600;color:#fff;backdrop-filter:blur(4px);
}
.hero-phone-body h2{
  margin-top:14px;color:#fff;
  font-size:clamp(19px,2.2vw,24px);font-weight:700;line-height:1.4;
}
.hero-phone-body p{margin-top:10px;font-size:14px;color:rgba(255,255,255,.82);line-height:1.7;}
.hero-badge-float{
  position:absolute;top:22px;right:-14px;z-index:3;
  background:#fff;border-radius:14px;padding:10px 16px;
  box-shadow:var(--sh-2);display:flex;align-items:center;gap:10px;
}
.hero-badge-float i{color:var(--c-mint);font-size:18px;}
.hero-badge-float b{display:block;font-size:14px;color:var(--c-ink);font-weight:700;line-height:1.2;}
.hero-badge-float span{font-size:12px;color:var(--c-ink-2);}

/* ---------- clip cards ---------- */
.clip-rail{
  display:flex;gap:20px;overflow-x:auto;
  padding:8px 24px 24px;margin:0 -24px;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;-ms-overflow-style:none;
}
.clip-rail::-webkit-scrollbar{display:none;}
.clip-card{
  flex:0 0 260px;scroll-snap-align:start;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-video);overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.clip-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.clip-thumb{position:relative;aspect-ratio:3/4;overflow:hidden;border-radius:0;}
.clip-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .22s var(--ease);}
.clip-card:hover .clip-thumb img{transform:scale(1.03);}
.clip-time{
  position:absolute;right:10px;bottom:10px;
  padding:3px 10px;border-radius:999px;
  background:rgba(20,32,44,.72);color:#fff;font-size:12px;font-weight:600;
  backdrop-filter:blur(4px);
}
.clip-num{
  position:absolute;left:10px;top:10px;
  width:26px;height:26px;border-radius:999px;
  background:var(--c-accent);color:#fff;font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.clip-body{padding:16px 16px 18px;}
.clip-body h3{font-size:16px;font-weight:700;line-height:1.5;overflow:hidden;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;}
.clip-meta{margin-top:12px;display:flex;align-items:center;justify-content:space-between;gap:10px;}
.badge-cat{
  display:inline-flex;align-items:center;gap:5px;
  padding:3px 10px;border-radius:999px;
  background:var(--c-chip);color:var(--c-primary);
  font-size:12px;font-weight:600;
}
.clip-enter{color:var(--c-ink-2);font-size:13px;display:inline-flex;align-items:center;gap:4px;}
.clip-card:hover .clip-enter{color:var(--c-accent);}

/* ---------- 种草清单 ---------- */
.pick-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.pick-item{
  display:flex;gap:18px;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:24px;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.pick-item:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.pick-item:nth-child(even){margin-top:28px;}
.pick-no{
  flex:0 0 auto;width:48px;height:48px;border-radius:14px;
  background:var(--c-chip);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:800;letter-spacing:-.02em;
}
.pick-main{flex:1;min-width:0;}
.pick-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.pick-head h3{font-size:18px;font-weight:700;}
.badge-score{
  display:inline-flex;align-items:center;gap:5px;
  padding:3px 10px;border-radius:999px;
  background:var(--c-accent-soft);color:#D9481B;
  font-size:12px;font-weight:700;
}
.pick-main p{margin-top:10px;font-size:14px;color:var(--c-ink-2);line-height:1.8;}
.pick-tags{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px;}
.pick-foot{margin-top:16px;display:flex;align-items:center;gap:12px;}
.btn-sm-main{
  display:inline-flex;align-items:center;gap:6px;
  height:38px;padding:0 16px;border-radius:10px;
  background:var(--c-accent);color:#fff;font-size:14px;font-weight:600;
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-sm-main:hover{background:#F0561F;color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(255,107,61,.3);}
.btn-sm-main:active{transform:translateY(0);}
.pick-link{font-size:14px;font-weight:600;color:var(--c-primary);}
.pick-link:hover{color:var(--c-accent);}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.news-thumb{aspect-ratio:16/10;overflow:hidden;border-radius:0;}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .22s var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.news-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--c-ink-2);}
.news-meta .badge-cat{padding:2px 10px;}
.news-body h3{margin-top:12px;font-size:17px;font-weight:700;line-height:1.55;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
.news-body h3 a{color:var(--c-ink);}
.news-body h3 a:hover{color:var(--c-primary);}
.news-body p{margin-top:10px;font-size:14px;color:var(--c-ink-2);line-height:1.75;overflow:hidden;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;}
.news-more{margin-top:auto;padding-top:16px;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);}
.news-card:hover .news-more{color:var(--c-accent);}
.empty-state{
  grid-column:1/-1;
  background:var(--c-surface);border:1px dashed var(--c-line);
  border-radius:var(--r-card);padding:56px 24px;text-align:center;
}
.empty-state .es-icon{
  width:64px;height:64px;border-radius:18px;background:var(--c-bg);
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;
  color:#A9BACE;font-size:24px;
}
.empty-state p{color:var(--c-ink-2);font-size:15px;}
.empty-state .btn-ghost{margin-top:18px;}

/* ---------- 口碑条 ---------- */
.quote-rail{
  display:flex;gap:20px;overflow-x:auto;
  padding:8px 24px 24px;margin:0 -24px;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;-ms-overflow-style:none;
}
.quote-rail::-webkit-scrollbar{display:none;}
.quote-card{
  flex:0 0 300px;scroll-snap-align:start;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:22px;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.quote-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.quote-top{display:flex;align-items:center;gap:12px;}
.avatar{
  width:42px;height:42px;border-radius:999px;flex-shrink:0;
  background:linear-gradient(140deg,#2A5C97,#2FB6A8);
  color:#fff;font-size:15px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.quote-top b{display:block;font-size:15px;font-weight:700;color:var(--c-ink);line-height:1.3;}
.quote-top span{font-size:12px;color:var(--c-ink-2);}
.stars{margin-top:6px;color:var(--c-mint);font-size:12px;letter-spacing:2px;}
.quote-card p{margin-top:14px;font-size:14px;color:var(--c-ink-2);line-height:1.8;}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--c-accent-soft);
  border-top:1px solid #FFDCCF;border-bottom:1px solid #FFDCCF;
  padding:64px 0;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-inner h2{font-size:clamp(22px,2.8vw,30px);font-weight:800;letter-spacing:-.01em;}
.cta-inner p{margin-top:10px;color:#8A4A31;font-size:15px;}
.cta-inner .btn-main{height:54px;padding:0 34px;font-size:17px;box-shadow:0 10px 26px rgba(255,107,61,.32);}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);margin-bottom:14px;overflow:hidden;
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.faq-item:hover{box-shadow:var(--sh-1);}
.faq-item.open{border-color:#CBDCEE;box-shadow:var(--sh-1);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:transparent;border:0;text-align:left;
  font-size:16px;font-weight:700;color:var(--c-ink);cursor:pointer;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--c-primary);}
.faq-arrow{
  flex:0 0 auto;width:26px;height:26px;border-radius:999px;
  background:var(--c-chip);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.faq-item.open .faq-arrow{transform:rotate(180deg);background:var(--c-primary);color:#fff;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .25s ease-out;
}
.faq-a-inner{
  padding:0 22px 22px;font-size:15px;color:var(--c-ink-2);line-height:1.85;
  border-top:1px solid var(--c-line);padding-top:16px;margin:0 22px 22px;padding-left:0;padding-right:0;
}

/* ---------- footer ---------- */
.site-footer{background:var(--c-primary-deep);color:#C9D9EA;padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand .f-logo{display:flex;align-items:center;gap:12px;}
.footer-brand .f-logo .brand-mark{background:linear-gradient(150deg,#356FB0,#2A5C97);box-shadow:none;}
.footer-brand .f-logo b{color:#fff;font-size:17px;font-weight:800;line-height:1.3;display:block;}
.footer-brand .f-logo span{font-size:12px;color:#8FAECF;letter-spacing:.06em;}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.85;color:#9FBBD8;max-width:340px;}
.footer-group > summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;
  font-size:15px;font-weight:700;color:#fff;padding-bottom:6px;
}
.footer-group > summary::-webkit-details-marker{display:none;}
.footer-group > summary::after{
  content:"\f107";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:12px;color:#8FAECF;transition:transform .2s var(--ease);
}
.footer-group[open] > summary::after{transform:rotate(180deg);}
.footer-group ul{margin-top:14px;display:flex;flex-direction:column;gap:10px;}
.footer-group ul a{font-size:14px;color:#9FBBD8;}
.footer-group ul a:hover{color:var(--c-accent);}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:#9FBBD8;margin-bottom:10px;}
.footer-contact i{color:#6E93B8;margin-top:4px;}
.footer-form{margin-top:14px;display:flex;gap:10px;}
.footer-form input{
  flex:1;min-width:0;height:44px;padding:0 14px;border-radius:12px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  color:#fff;font-size:14px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.footer-form input::placeholder{color:#7F9DBE;}
.footer-form input:focus{outline:none;border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(255,107,61,.18);}
.footer-form button{
  height:44px;padding:0 18px;border-radius:12px;border:0;
  background:var(--c-accent);color:#fff;font-size:14px;font-weight:600;cursor:pointer;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.footer-form button:hover{background:#F0561F;transform:translateY(-1px);}
.footer-form button:active{transform:translateY(0);}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:#8FAECF;}
.footer-bottom .fb-links{display:flex;gap:20px;}
.footer-bottom .fb-links a{font-size:13px;color:#8FAECF;}
.footer-bottom .fb-links a:hover{color:var(--c-accent);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .news-grid{grid-template-columns:repeat(3,1fr);}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;row-gap:36px;}
  .footer-contact-col{grid-column:1/-1;}
}
@media (max-width:991px){
  .hero{padding:40px 0 48px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual{max-width:460px;margin:0 auto;width:100%;}
  .hero-lead{max-width:none;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .pick-grid{grid-template-columns:1fr;}
  .pick-item:nth-child(even){margin-top:0;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .head-top{flex-wrap:wrap;}
  .head-cta{width:100%;}
  .head-cta .btn-main{flex:1;}
  .head-cta .btn-ghost{display:none;}
  .hero-badge-float{right:8px;top:14px;}
  .hero-stats{gap:28px;}
  .news-grid{grid-template-columns:1fr;}
  .clip-card{flex:0 0 78%;}
  .quote-card{flex:0 0 84%;}
}
@media (max-width:575px){
  .wrap{padding:0 16px;}
  .clip-rail,.quote-rail{padding-left:16px;padding-right:16px;margin:0 -16px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;}
  .cta-inner .btn-main{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .footer-form{flex-direction:column;}
  .footer-form button{width:100%;}
  .pick-item{padding:20px;gap:14px;}
}

/* roulang page: article */
:root{
  --c-primary:#2A5C97;
  --c-primary-deep:#17395F;
  --c-accent:#FF6B3D;
  --c-accent-soft:#FFEDE6;
  --c-mint:#2FB6A8;
  --c-ink:#14202C;
  --c-ink-2:#5A6B7C;
  --c-line:#E4EAF1;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-chip:#EAF1FA;
  --r-card:16px;
  --r-vcard:20px;
  --r-btn:12px;
  --sh-1:0 1px 2px rgba(20,45,80,.04), 0 8px 28px rgba(20,45,80,.08);
  --sh-2:0 4px 8px rgba(20,45,80,.06), 0 16px 40px rgba(20,45,80,.14);
  --ease:cubic-bezier(.25,.7,.35,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--c-accent);}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.4;color:var(--c-ink);}
p{margin:0 0 1em;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--c-line);
  box-shadow:0 1px 2px rgba(20,45,80,.04);
  backdrop-filter:blur(8px);
}
.head-top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0 8px;}
.brand{display:flex;align-items:center;gap:12px;min-width:0;}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;flex:0 0 44px;
  background:var(--c-primary);color:#fff;font-weight:800;font-size:15px;letter-spacing:.6px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.28;min-width:0;}
.b-main{font-size:17px;font-weight:800;color:var(--c-ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.b-sub{font-size:12px;color:var(--c-ink-2);}
.head-cta{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;white-space:nowrap;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn-main{background:var(--c-accent);color:#fff;border:1px solid var(--c-accent);box-shadow:0 1px 2px rgba(255,107,61,.24);}
.btn-main:hover{background:#E85A2C;border-color:#E85A2C;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-main:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:var(--c-surface);color:var(--c-primary-deep);border:1px solid var(--c-line);}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-ghost:active{transform:translateY(0);}
.nav-chips{display:flex;gap:10px;overflow-x:auto;padding:6px 0 14px;scrollbar-width:none;-ms-overflow-style:none;}
.nav-chips::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;align-items:center;height:38px;padding:0 16px;gap:6px;
  border-radius:999px;background:var(--c-chip);border:1px solid transparent;
  color:var(--c-primary-deep);font-size:14px;font-weight:600;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.chip:hover{background:#DCE9F8;color:var(--c-primary);}
.chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.chip.active:hover{background:var(--c-primary-deep);color:#fff;}

/* ---------- 文章页头部横幅 ---------- */
.article-hero{
  position:relative;color:#fff;
  background-image:linear-gradient(180deg,rgba(23,57,95,.88),rgba(23,57,95,.94)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  padding:34px 0 40px;
}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(255,255,255,.76);margin-bottom:16px;}
.crumbs a{color:rgba(255,255,255,.9);}
.crumbs a:hover{color:var(--c-accent);}
.crumbs .sep{color:rgba(255,255,255,.45);}
.hero-chip{
  display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 14px;
  border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.32);
  color:#fff;font-size:13px;font-weight:600;margin-right:8px;
}
.hero-note{font-size:14px;color:rgba(255,255,255,.82);margin:14px 0 0;max-width:720px;}

/* ---------- 版面网格 ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;
  align-items:start;padding:40px 0 72px;
}
.post-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  padding:32px 36px 36px;
}
.post-inner{max-width:780px;margin:0 auto;}
.post-title{font-size:clamp(26px,3.6vw,38px);font-weight:800;line-height:1.35;margin-bottom:16px;}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;font-size:13px;color:var(--c-ink-2);padding-bottom:22px;border-bottom:1px solid var(--c-line);margin-bottom:28px;}
.post-meta span{display:inline-flex;align-items:center;gap:6px;}
.post-meta i{color:var(--c-primary);}
.post-cover{margin:0 0 28px;border-radius:12px;overflow:hidden;border:1px solid var(--c-line);}
.post-cover img{width:100%;height:auto;object-fit:cover;}

/* ---------- 长文排版 ---------- */
.post-body{font-size:16px;line-height:1.85;color:var(--c-ink);word-wrap:break-word;}
.post-body p{margin:0 0 1.2em;}
.post-body h2{
  font-size:clamp(21px,2.6vw,27px);font-weight:700;line-height:1.45;
  margin:1.7em 0 .8em;padding-left:14px;border-left:4px solid var(--c-primary);
}
.post-body h3{
  font-size:19px;font-weight:700;line-height:1.5;
  margin:1.4em 0 .6em;padding-left:12px;border-left:3px solid var(--c-primary);
}
.post-body h2:first-child,.post-body h3:first-child{margin-top:0;}
.post-body ul,.post-body ol{padding-left:1.5em;margin:0 0 1.2em;}
.post-body li{margin-bottom:.5em;}
.post-body blockquote{
  margin:1.3em 0;padding:16px 20px;background:#F7FAFE;
  border-left:4px solid var(--c-primary);border-radius:0 12px 12px 0;
  color:var(--c-primary-deep);font-size:15px;
}
.post-body blockquote p:last-child{margin-bottom:0;}
.post-body img{border-radius:12px;margin:1.3em auto;max-width:100%;height:auto;}
.post-body code{background:#EAF1FA;color:var(--c-primary-deep);padding:2px 6px;border-radius:6px;font-size:14px;}
.post-body pre{
  background:#14202C;color:#E8EEF5;padding:16px 18px;border-radius:12px;
  overflow-x:auto;font-size:14px;line-height:1.7;margin:0 0 1.3em;
}
.post-body pre code{background:none;color:inherit;padding:0;}
.post-body table{width:100%;border-collapse:collapse;margin:0 0 1.3em;font-size:14px;display:block;overflow-x:auto;}
.post-body table th,.post-body table td{border:1px solid var(--c-line);padding:10px 12px;text-align:left;}
.post-body table th{background:#F5F8FC;font-weight:700;}
.post-body a{color:var(--c-primary);border-bottom:1px solid rgba(42,92,151,.35);}
.post-body a:hover{color:var(--c-accent);border-color:var(--c-accent);}

/* ---------- 空态 ---------- */
.empty-state{
  text-align:center;padding:48px 24px;border:1px dashed var(--c-line);
  border-radius:var(--r-card);background:#FAFCFF;
}
.empty-state i{font-size:34px;color:#B9C7D6;margin-bottom:14px;display:block;}
.empty-state p{color:var(--c-ink-2);margin-bottom:20px;font-size:15px;}

/* ---------- 侧栏 ---------- */
.side-col{display:flex;flex-direction:column;gap:20px;position:sticky;top:104px;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);padding:22px 22px 20px;
  transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.side-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.side-title{font-size:16px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-title i{color:var(--c-primary);}
.side-list{list-style:none;margin:0;padding:0;}
.side-list li+li{border-top:1px solid var(--c-line);}
.side-list a{
  display:flex;align-items:center;gap:10px;padding:12px 0;font-size:14px;
  color:var(--c-ink);min-height:44px;
}
.side-list a:hover{color:var(--c-primary);}
.side-list i{color:var(--c-primary);width:16px;text-align:center;}
.side-text{font-size:14px;color:var(--c-ink-2);margin:0;}
.side-badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;
  border-radius:999px;background:#E7F7F5;color:#1E8C81;font-size:12px;font-weight:700;margin-bottom:10px;
}

/* ---------- 文末相关推荐 ---------- */
.section{padding:0 0 72px;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;}
.sec-title{font-size:clamp(21px,2.6vw,28px);font-weight:700;}
.sec-sub{font-size:14px;color:var(--c-ink-2);margin:6px 0 0;}
.sec-more{font-size:14px;font-weight:600;white-space:nowrap;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  overflow:hidden;color:inherit;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);color:inherit;}
.rel-cover{aspect-ratio:16/10;overflow:hidden;background:#EAF1FA;}
.rel-cover img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease);}
.rel-card:hover .rel-cover img{transform:scale(1.03);}
.rel-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;}
.badge-cat{
  align-self:flex-start;display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;background:var(--c-chip);color:var(--c-primary);font-size:12px;font-weight:700;
}
.rel-body h3{font-size:16px;font-weight:700;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-body p{font-size:13px;color:var(--c-ink-2);line-height:1.7;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-link{font-size:13px;font-weight:700;color:var(--c-accent);display:inline-flex;align-items:center;gap:6px;}

/* ---------- 引导条 ---------- */
.cta-band{
  background:var(--c-accent-soft);border:1px solid #FFDCCF;border-radius:var(--r-vcard);
  padding:32px 34px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  margin-bottom:72px;
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);font-weight:800;margin-bottom:8px;}
.cta-band p{margin:0;color:var(--c-ink-2);font-size:15px;}
.cta-band .btn-main{height:48px;padding:0 26px;font-size:16px;}

/* ---------- 常见问题 ---------- */
.faq .accordion-item{
  border:1px solid var(--c-line);border-radius:var(--r-card);background:var(--c-surface);
  margin-bottom:14px;overflow:hidden;box-shadow:var(--sh-1);
}
.faq .accordion-button{
  font-size:16px;font-weight:700;color:var(--c-ink);background:var(--c-surface);
  padding:18px 22px;box-shadow:none;
}
.faq .accordion-button:not(.collapsed){color:var(--c-primary);background:#F7FAFE;}
.faq .accordion-button:focus{box-shadow:0 0 0 2px rgba(42,92,151,.35);border-color:transparent;z-index:3;}
.faq .accordion-button::after{
  background-image:none;content:"";width:10px;height:10px;flex:0 0 10px;
  border-right:2px solid var(--c-ink-2);border-bottom:2px solid var(--c-ink-2);
  transform:rotate(45deg);transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--c-primary);}
.faq .accordion-body{padding:4px 22px 22px;font-size:15px;color:var(--c-ink-2);line-height:1.85;background:#FBFDFF;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-deep);color:#C9D8E8;padding:56px 0 0;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.4fr;gap:32px;padding-bottom:40px;}
.f-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.f-logo b{display:block;color:#fff;font-size:16px;}
.f-logo span{display:block;font-size:12px;color:#9FB6CE;}
.footer-brand p{font-size:14px;line-height:1.8;color:#AFC3D8;margin:0;}
.footer-group{border:0;padding:0;margin:0 0 8px;}
.footer-group summary{
  list-style:none;cursor:pointer;color:#fff;font-size:15px;font-weight:700;
  margin-bottom:14px;display:flex;align-items:center;justify-content:space-between;
}
.footer-group summary::-webkit-details-marker{display:none;}
.footer-group summary::after{content:"";width:8px;height:8px;border-right:2px solid #7E9CBB;border-bottom:2px solid #7E9CBB;transform:rotate(45deg);display:none;}
.footer-group ul{list-style:none;margin:0;padding:0;}
.footer-group li{margin-bottom:10px;}
.footer-group a{color:#C9D8E8;font-size:14px;display:inline-flex;align-items:center;min-height:28px;}
.footer-group a:hover{color:var(--c-accent);}
.footer-contact li{display:flex;gap:10px;font-size:14px;line-height:1.7;color:#AFC3D8;margin-bottom:12px;}
.footer-contact i{color:var(--c-accent);margin-top:5px;}
.footer-form{display:flex;gap:10px;margin-top:6px;}
.footer-form input{
  flex:1;min-width:0;height:44px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);color:#fff;font-size:14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.footer-form input::placeholder{color:#8FA7C0;}
.footer-form input:focus{outline:none;border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(255,107,61,.18);}
.footer-form button{
  height:44px;padding:0 18px;border-radius:var(--r-btn);border:1px solid var(--c-accent);
  background:var(--c-accent);color:#fff;font-weight:700;font-size:14px;cursor:pointer;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.footer-form button:hover{background:#E85A2C;transform:translateY(-1px);}
.footer-form button:active{transform:translateY(0);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{margin:0;font-size:13px;color:#9FB6CE;}
.fb-links{display:flex;gap:18px;}
.fb-links a{font-size:13px;color:#C9D8E8;}
.fb-links a:hover{color:var(--c-accent);}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 290px;gap:26px;}
}
@media (max-width:991px){
  .article-layout{grid-template-columns:1fr;padding:28px 0 56px;}
  .side-col{position:static;order:2;}
  .post-card{padding:26px 22px 28px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .footer-group summary::after{display:block;}
  .footer-group:not([open]) ul{display:none;}
}
@media (max-width:767px){
  .head-top{flex-wrap:wrap;padding:12px 0 8px;}
  .head-cta{width:100%;}
  .head-cta .btn-ghost{display:none;}
  .head-cta .btn-main{flex:1;}
  .article-hero{padding:26px 0 30px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:26px 22px;margin-bottom:56px;}
  .cta-band .btn-main{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:18px;}
  .footer-form{flex-direction:column;}
  .footer-form button{width:100%;}
}
@media (max-width:575px){
  .wrap{padding:0 16px;}
  .b-main{font-size:15px;}
  .b-sub{display:none;}
  .related-grid{grid-template-columns:1fr;}
  .post-meta{gap:6px 14px;}
  .section{padding-bottom:48px;}
  .btn-main,.btn-ghost{height:48px;}
}

/* roulang page: category1 */
:root{
  --c-primary:#2A5C97;
  --c-primary-deep:#17395F;
  --c-primary-soft:#EAF1FA;
  --c-accent:#FF6B3D;
  --c-accent-soft:#FFEDE6;
  --c-mint:#2FB6A8;
  --c-ink:#14202C;
  --c-ink-2:#5A6B7C;
  --c-line:#E4EAF1;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-chip:#EAF1FA;
  --r-card:16px;
  --r-media:20px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,45,80,.04), 0 8px 28px rgba(20,45,80,.08);
  --sh-2:0 4px 8px rgba(20,45,80,.06), 0 16px 40px rgba(20,45,80,.14);
  --t:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-primary);text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t)}
a:hover{color:var(--c-primary-deep)}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--c-ink)}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media (min-width:1400px){.wrap{max-width:1320px}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.95);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--t);
}
.site-header.is-stuck{box-shadow:var(--sh-1)}
.head-top{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px 0 10px;
}
.brand{display:flex;align-items:center;gap:12px;min-height:44px;text-decoration:none}
.brand:hover .b-main{color:var(--c-primary)}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;flex:0 0 44px;border-radius:14px;
  background:linear-gradient(140deg,#2A5C97,#17395F);
  color:#fff;font-weight:800;font-size:14px;letter-spacing:.6px;
  box-shadow:var(--sh-1);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.b-main{font-size:17px;font-weight:800;color:var(--c-ink);transition:color var(--t)}
.b-sub{font-size:12px;color:var(--c-ink-2);letter-spacing:.4px}
.head-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.nav-chips{
  display:flex;gap:10px;overflow-x:auto;padding:0 0 14px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  min-height:40px;padding:0 18px;border-radius:var(--r-pill);
  background:var(--c-chip);color:var(--c-primary);
  border:1px solid transparent;font-size:14px;font-weight:600;
  white-space:nowrap;transition:transform var(--t),background-color var(--t),color var(--t),border-color var(--t),box-shadow var(--t);
}
.chip:hover{background:#DCE8F7;color:var(--c-primary-deep);transform:translateY(-1px)}
.chip:active{transform:translateY(0)}
.chip.active{background:var(--c-primary);color:#fff;border-color:var(--c-primary);box-shadow:var(--sh-1)}
.chip.active:hover{background:#224B7D;color:#fff}

/* ---------- 按钮 ---------- */
.btn-main,.btn-accent,.btn-line,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;border:1px solid transparent;
  white-space:nowrap;cursor:pointer;
  transition:transform var(--t),box-shadow var(--t),background-color var(--t),color var(--t),border-color var(--t);
}
.btn-main{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1)}
.btn-main:hover{background:#224B7D;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-main:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 1px 2px rgba(20,45,80,.04),0 8px 24px rgba(255,107,61,.30)}
.btn-accent:hover{background:#E85A2D;color:#fff;transform:translateY(-1px);box-shadow:0 4px 8px rgba(20,45,80,.06),0 16px 40px rgba(255,107,61,.36)}
.btn-accent:active{transform:translateY(0)}
.btn-line{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-line);box-shadow:var(--sh-1)}
.btn-line:hover{border-color:var(--c-primary);color:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-line:active{transform:translateY(0)}
.btn-ghost{min-height:40px;padding:0 14px;background:transparent;color:var(--c-primary)}
.btn-ghost:hover{background:var(--c-chip);color:var(--c-primary-deep)}
.btn-hero-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.45)}
.btn-hero-ghost:hover{background:rgba(255,255,255,.22);color:#fff;border-color:#fff;transform:translateY(-1px)}

/* ---------- 页头横幅 ---------- */
.page-hero{
  position:relative;
  background:#17395F url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding:52px 0 56px;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(108deg,rgba(23,57,95,.94) 0%,rgba(23,57,95,.78) 52%,rgba(23,57,95,.58) 100%);
}
.page-hero .wrap{position:relative;z-index:2}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:#A9C2DC;margin-bottom:18px}
.crumb a{color:#D6E4F2}
.crumb a:hover{color:var(--c-accent)}
.crumb i{font-size:10px;opacity:.7}
.hero-title{
  font-size:clamp(28px,4.2vw,42px);
  font-weight:800;color:#fff;letter-spacing:.5px;
  max-width:860px;margin-bottom:16px;
}
.hero-lead{
  max-width:760px;font-size:16px;line-height:1.85;color:#D3E1F0;margin-bottom:22px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);
  color:#EAF3FC;font-size:13px;font-weight:600;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 通用板块 ---------- */
.section{padding:72px 0}
.section-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);padding:72px 0}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1.4px;
  color:var(--c-primary);text-transform:uppercase;margin-bottom:10px;
}
.sec-eyebrow::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--c-accent)}
.sec-title{font-size:clamp(22px,3vw,32px);font-weight:700;margin-bottom:12px}
.sec-desc{font-size:15px;color:var(--c-ink-2);margin:0}

/* ---------- 双列大卡图文 ---------- */
.dual-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.fcard{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t);
}
.fcard:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.fcard-media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--c-chip)}
.fcard-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t)}
.fcard:hover .fcard-media img{transform:scale(1.03)}
.fcard-badge{
  position:absolute;left:14px;top:14px;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:rgba(23,57,95,.82);color:#fff;
  font-size:12px;font-weight:700;letter-spacing:.4px;
}
.fcard-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.fcard-title{font-size:19px;font-weight:700;margin-bottom:10px}
.fcard-text{font-size:15px;color:var(--c-ink-2);line-height:1.85;margin:0 0 16px;flex:1}
.fcard-meta{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--c-ink-2);
  padding-top:14px;border-top:1px dashed var(--c-line);
}
.fcard-meta i{color:var(--c-primary)}
.fcard-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--c-line)}

/* ---------- 对照区 ---------- */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.compare-col{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  padding:28px 26px 26px;display:flex;flex-direction:column;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.compare-col:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFDDEC}
.compare-col.is-accent{background:var(--c-accent-soft);border-color:#FFD8C9}
.compare-head{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.compare-icon{
  width:44px;height:44px;flex:0 0 44px;border-radius:13px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:18px;
}
.compare-col.is-accent .compare-icon{background:#fff;color:var(--c-accent)}
.compare-head h3{font-size:20px;font-weight:700;margin:0}
.compare-sub{font-size:14px;color:var(--c-ink-2);margin:0 0 18px}
.compare-list{display:flex;flex-direction:column;gap:12px;margin:0}
.compare-item{display:flex;gap:10px;font-size:15px;line-height:1.8;color:var(--c-ink-2)}
.compare-item i{color:var(--c-mint);font-size:14px;margin-top:7px;flex:0 0 auto}

/* ---------- 设备要点列表 ---------- */
.dev-list{display:flex;flex-direction:column;gap:14px}
.dev-row{
  display:flex;align-items:flex-start;gap:18px;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  padding:22px 24px;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.dev-row:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFDDEC}
.dev-icon{
  width:48px;height:48px;flex:0 0 48px;border-radius:14px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:19px;
}
.dev-text h3{font-size:17px;font-weight:700;margin-bottom:6px}
.dev-text p{margin:0;font-size:15px;color:var(--c-ink-2);line-height:1.85}
.dev-note{
  display:inline-flex;align-items:center;gap:6px;margin-top:10px;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--c-accent-soft);color:#C8451C;font-size:12px;font-weight:700;
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px}
.accordion-item{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;margin-bottom:12px;
  box-shadow:var(--sh-1);
}
.accordion-item:last-child{margin-bottom:0}
.accordion-button{
  width:100%;display:flex;align-items:center;gap:14px;
  padding:18px 22px;font-size:16px;font-weight:700;color:var(--c-ink);
  background:var(--c-surface);border:0;text-align:left;
  box-shadow:none!important;transition:background-color var(--t),color var(--t);
}
.accordion-button:hover{background:#F7FAFD;color:var(--c-primary)}
.accordion-button:not(.collapsed){background:var(--c-primary-soft);color:var(--c-primary)}
.accordion-button::after{
  content:"";flex:0 0 auto;margin-left:auto;
  width:9px;height:9px;background-image:none;
  border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:rotate(45deg);transition:transform var(--t);
}
.accordion-button:not(.collapsed)::after{transform:rotate(-135deg)}
.accordion-body{padding:0 22px 22px;font-size:15px;line-height:1.9;color:var(--c-ink-2)}
.accordion-body strong{color:var(--c-ink)}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-accent-soft);
  border:1px solid #FFD8C9;border-radius:24px;
  padding:44px 32px;text-align:center;
  box-shadow:var(--sh-1);
}
.cta-title{font-size:clamp(21px,2.6vw,28px);font-weight:800;margin-bottom:10px}
.cta-sub{font-size:15px;color:var(--c-ink-2);max-width:640px;margin:0 auto 26px}
.cta-band .btn-accent{min-height:50px;padding:0 32px;font-size:16px}

/* ---------- 内链区 ---------- */
.browse-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.browse-card{
  display:block;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px 22px;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.browse-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFDDEC;color:var(--c-primary-deep)}
.browse-card .bc-top{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.browse-card .bc-icon{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-chip);color:var(--c-primary);font-size:16px;
}
.browse-card h3{font-size:16px;font-weight:700;margin:0;color:var(--c-ink)}
.browse-card p{margin:0;font-size:14px;color:var(--c-ink-2);line-height:1.8}
.browse-card .bc-go{
  display:inline-flex;align-items:center;gap:6px;margin-top:14px;
  font-size:13px;font-weight:700;color:var(--c-primary);
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-primary-deep);color:#C7D8EA;
  padding:56px 0 22px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.7fr;gap:32px}
.f-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.f-logo .brand-mark{background:rgba(255,255,255,.14);box-shadow:none;color:#fff}
.f-logo b{display:block;font-size:16px;color:#fff;line-height:1.4}
.f-logo span{display:block;font-size:12px;color:#93B2D2}
.footer-brand p{font-size:14px;line-height:1.85;color:#A9C2DC;margin:0}
.footer-group{margin:0}
.footer-group summary{
  list-style:none;cursor:pointer;
  font-size:15px;font-weight:700;color:#fff;margin-bottom:14px;
  display:flex;align-items:center;justify-content:space-between;
}
.footer-group summary::-webkit-details-marker{display:none}
.footer-group summary::after{
  content:"";width:7px;height:7px;
  border-right:2px solid #7FA3C8;border-bottom:2px solid #7FA3C8;
  transform:rotate(45deg);transition:transform var(--t);
}
.footer-group[open] summary::after{transform:rotate(-135deg)}
.footer-group ul{display:flex;flex-direction:column;gap:10px}
.footer-group li a{font-size:14px;color:#B6CBDF;min-height:24px;display:inline-flex;align-items:center}
.footer-group li a:hover{color:var(--c-accent)}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:#A9C2DC;line-height:1.7;align-items:flex-start}
.footer-contact li i{color:#7FA3C8;margin-top:5px;flex:0 0 auto}
.footer-form{display:flex;gap:10px;margin-top:16px}
.footer-form input{
  flex:1 1 auto;min-width:0;height:44px;padding:0 14px;
  border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.08);color:#fff;font-size:14px;
}
.footer-form input::placeholder{color:#8FAECB}
.footer-form input:focus{outline:none;border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(255,107,61,.22)}
.footer-form button{
  height:44px;padding:0 18px;border:0;border-radius:var(--r-btn);
  background:var(--c-accent);color:#fff;font-size:14px;font-weight:700;
  transition:background-color var(--t),transform var(--t);
}
.footer-form button:hover{background:#E85A2D;transform:translateY(-1px)}
.footer-form button:active{transform:translateY(0)}
.footer-bottom{
  margin-top:40px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{margin:0;font-size:13px;color:#93B2D2}
.fb-links{display:flex;gap:18px;flex-wrap:wrap}
.fb-links a{font-size:13px;color:#B6CBDF}
.fb-links a:hover{color:var(--c-accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
  .footer-contact-col{grid-column:1 / -1}
}
@media (max-width:991px){
  .section,.section-alt{padding:56px 0}
  .page-hero{padding:40px 0 46px}
  .dual-grid,.compare-grid{grid-template-columns:1fr}
  .browse-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .head-top{flex-wrap:wrap}
  .head-cta .btn-ghost{display:none}
  .brand-mark{width:40px;height:40px;flex:0 0 40px;font-size:12px}
  .b-main{font-size:15px}
  .b-sub{font-size:11px}
  .hero-title{font-size:26px}
  .hero-lead{font-size:15px}
  .hero-actions{width:100%}
  .hero-actions .btn-accent,.hero-actions .btn-hero-ghost{flex:1 1 100%;width:100%}
  .dev-row{flex-direction:column;gap:12px}
  .cta-band{padding:32px 20px}
  .cta-band .btn-accent{width:100%}
  .browse-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-form{flex-direction:column}
  .footer-form button{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  .section,.section-alt{padding:48px 0}
  .fcard-body{padding:18px}
  .compare-col{padding:22px 18px}
  .dev-row{padding:18px}
  .accordion-button{padding:16px 18px;font-size:15px}
  .accordion-body{padding:0 18px 18px}
}

/* roulang page: category2 */
:root{
  --c-primary:#2A5C97;
  --c-primary-deep:#17395F;
  --c-accent:#FF6B3D;
  --c-accent-soft:#FFEDE6;
  --c-mint:#2FB6A8;
  --c-ink:#14202C;
  --c-ink-2:#5A6B7C;
  --c-line:#E4EAF1;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-chip:#EAF1FA;
  --r-card:16px;
  --r-media:20px;
  --r-btn:12px;
  --sh-1:0 1px 2px rgba(20,45,80,.04),0 8px 28px rgba(20,45,80,.08);
  --sh-2:0 4px 8px rgba(20,45,80,.06),0 16px 40px rgba(20,45,80,.14);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:#1E4676;}
button,input{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
@media (min-width:1400px){.wrap{max-width:1320px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 22px rgba(20,45,80,.08);}
.head-top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0 10px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:46px;height:46px;flex:0 0 46px;border-radius:14px;
  background:var(--c-primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;letter-spacing:.5px;
  box-shadow:var(--sh-1);
}
.brand-text{display:flex;flex-direction:column;line-height:1.3;}
.b-main{font-size:17px;font-weight:800;color:var(--c-ink);}
.b-sub{font-size:12px;color:var(--c-ink-2);}
.head-cta{display:flex;align-items:center;gap:10px;}
.btn-ghost,.btn-main{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:var(--r-btn);
  font-size:14px;font-weight:700;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.btn-ghost{background:var(--c-surface);color:var(--c-primary);border:1px solid var(--c-line);}
.btn-ghost:hover{color:var(--c-primary);border-color:#B9CEE6;transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-ghost:active{transform:translateY(0);}
.btn-main{background:var(--c-accent);color:#fff;border:1px solid var(--c-accent);box-shadow:var(--sh-1);}
.btn-main:hover{background:#F2561F;border-color:#F2561F;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-main:active{transform:translateY(0);box-shadow:var(--sh-1);}
.nav-chips{
  display:flex;gap:10px;overflow-x:auto;padding:0 0 14px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.nav-chips::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 16px;border-radius:999px;border:1px solid var(--c-line);
  background:var(--c-chip);color:var(--c-ink);
  font-size:14px;font-weight:600;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.chip:hover{background:#DDE9F7;color:var(--c-primary);transform:translateY(-1px);}
.chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.chip.active:hover{background:#244F82;color:#fff;}

/* ============ 首屏 ============ */
.page-hero{
  position:relative;overflow:hidden;border-radius:var(--r-media);
  margin-top:24px;min-height:360px;display:flex;align-items:flex-end;
  background:var(--c-primary-deep) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(23,57,95,.72) 0%,rgba(23,57,95,.90) 100%);
}
.hero-inner{position:relative;z-index:2;padding:40px 30px;max-width:760px;color:#fff;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);
  color:#fff;font-size:13px;font-weight:600;letter-spacing:.3px;
}
.hero-inner h1{
  margin:16px 0 12px;
  font-size:clamp(28px,4.2vw,44px);font-weight:800;line-height:1.22;letter-spacing:-.5px;
}
.hero-lead{font-size:16px;line-height:1.85;color:rgba(255,255,255,.86);max-width:620px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
.btn-line{
  display:inline-flex;align-items:center;gap:8px;min-height:46px;padding:0 22px;
  border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.55);
  background:rgba(255,255,255,.08);color:#fff;font-size:15px;font-weight:700;
  transition:background .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.btn-line:hover{background:rgba(255,255,255,.2);border-color:#fff;color:#fff;transform:translateY(-1px);}
.btn-line:active{transform:translateY(0);}

/* ============ 通用板块 ============ */
.section{padding:72px 0;}
.section.tight{padding:56px 0;}
.sec-head{max-width:720px;margin-bottom:40px;}
.sec-kicker{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:1.4px;
  color:var(--c-accent);text-transform:uppercase;margin-bottom:10px;
}
.sec-head h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.35;letter-spacing:-.3px;}
.sec-head p{margin-top:12px;color:var(--c-ink-2);font-size:15.5px;}

/* ============ 概览数据条 ============ */
.facts{
  display:grid;gap:16px;grid-template-columns:repeat(4,1fr);
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:26px 24px;margin-top:-42px;position:relative;z-index:5;
}
.fact{text-align:left;padding:0 6px;border-right:1px solid var(--c-line);}
.fact:last-child{border-right:none;}
.fact b{display:block;font-size:26px;font-weight:800;color:var(--c-primary);line-height:1.2;}
.fact span{display:block;margin-top:6px;font-size:13.5px;color:var(--c-ink-2);}

/* ============ 时间轴 ============ */
.timeline{position:relative;padding-left:0;margin-top:8px;}
.timeline::before{
  content:"";position:absolute;left:27px;top:16px;bottom:26px;width:2px;
  background:linear-gradient(180deg,var(--c-primary) 0%,var(--c-line) 100%);
  border-radius:2px;
}
.tl-item{position:relative;display:grid;grid-template-columns:56px 1fr;gap:24px;padding-bottom:28px;}
.tl-item:last-child{padding-bottom:0;}
.tl-node{
  width:56px;height:56px;border-radius:50%;
  background:var(--c-surface);border:2px solid var(--c-line);
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;color:var(--c-primary);
  box-shadow:var(--sh-1);position:relative;z-index:2;
  transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.tl-item:hover .tl-node{border-color:var(--c-primary);transform:translateY(-2px);}
.tl-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:24px 26px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.tl-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.tl-card h3{font-size:19px;font-weight:700;line-height:1.5;}
.tl-tag{
  display:inline-block;margin-left:10px;vertical-align:middle;
  padding:3px 10px;border-radius:999px;background:var(--c-chip);color:var(--c-primary);
  font-size:12px;font-weight:700;
}
.tl-card p{margin-top:10px;color:var(--c-ink-2);font-size:15px;}
.tl-list{margin-top:14px;display:grid;gap:8px;}
.tl-list li{position:relative;padding-left:24px;font-size:14.5px;color:var(--c-ink-2);}
.tl-list li::before{
  content:"";position:absolute;left:2px;top:10px;width:8px;height:8px;border-radius:50%;
  background:var(--c-mint);
}

/* ============ 设备卡片 ============ */
.device-grid{display:grid;gap:20px;grid-template-columns:repeat(4,1fr);}
.device-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:26px 22px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.device-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFE0F0;}
.device-icon{
  width:44px;height:44px;border-radius:12px;background:var(--c-chip);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:16px;
}
.device-card h3{font-size:17px;font-weight:700;}
.device-card p{margin-top:8px;font-size:14.5px;color:var(--c-ink-2);}

/* ============ 图文区 ============ */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;}
.split-media{border-radius:var(--r-media);overflow:hidden;box-shadow:var(--sh-1);border:1px solid var(--c-line);}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .22s var(--ease);}
.split-media:hover img{transform:scale(1.03);}
.split h2{font-size:clamp(22px,3vw,30px);font-weight:700;line-height:1.35;}
.split p{margin-top:14px;color:var(--c-ink-2);font-size:15.5px;}
.check-list{margin-top:20px;display:grid;gap:12px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:14px;
  padding:14px 16px;font-size:14.5px;color:var(--c-ink-2);box-shadow:var(--sh-1);
}
.check-list i{color:var(--c-mint);margin-top:4px;font-size:15px;}

/* ============ FAQ ============ */
.faq-list{max-width:900px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);margin-bottom:14px;overflow:hidden;
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.faq-item:hover{border-color:#CFE0F0;}
.faq-item[open]{box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 56px 18px 22px;font-size:16px;font-weight:700;color:var(--c-ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";position:absolute;right:24px;top:50%;
  width:9px;height:9px;border-right:2px solid var(--c-primary);border-bottom:2px solid var(--c-primary);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .2s var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);}
.faq-body{
  padding:0 22px 20px;font-size:15px;color:var(--c-ink-2);
  border-top:1px solid var(--c-line);background:#FBFDFF;padding-top:16px;
}

/* ============ 分类内链 ============ */
.link-grid{display:grid;gap:20px;grid-template-columns:repeat(4,1fr);}
.link-card{
  display:block;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);padding:22px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFE0F0;color:inherit;}
.link-card b{display:block;font-size:16.5px;font-weight:700;color:var(--c-ink);}
.link-card span{display:block;margin-top:8px;font-size:14px;color:var(--c-ink-2);}
.link-card i{color:var(--c-accent);margin-top:14px;display:inline-block;}

/* ============ CTA ============ */
.cta-band{
  background:var(--c-accent-soft);border:1px solid #FFD8C9;border-radius:20px;
  padding:40px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--sh-1);
}
.cta-band h2{font-size:clamp(20px,2.6vw,28px);font-weight:700;line-height:1.4;}
.cta-band p{margin-top:10px;color:var(--c-ink-2);font-size:15px;}
.cta-band .btn-main{min-height:50px;padding:0 28px;font-size:16px;flex:0 0 auto;}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-primary-deep);color:#D7E3F1;margin-top:24px;padding:64px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:32px;}
.footer-brand .f-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{background:#22507F;box-shadow:none;}
.footer-brand b{display:block;color:#fff;font-size:16.5px;font-weight:800;}
.footer-brand .f-logo span{display:block;font-size:12.5px;color:#9FBBD8;}
.footer-brand p{font-size:14px;line-height:1.85;color:#AFC6DE;}
.footer-group{border:none;}
.footer-group summary{
  list-style:none;cursor:pointer;color:#fff;font-size:15px;font-weight:700;margin-bottom:14px;
}
.footer-group summary::-webkit-details-marker{display:none;}
.footer-group ul{display:grid;gap:10px;}
.footer-group a{color:#AFC6DE;font-size:14px;}
.footer-group a:hover{color:var(--c-accent);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:#AFC6DE;line-height:1.7;}
.footer-contact i{color:#7FA6CC;margin-top:5px;}
.footer-form{display:flex;gap:10px;margin-top:16px;}
.footer-form input{
  flex:1;min-height:44px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.06);color:#fff;font-size:14px;
}
.footer-form input::placeholder{color:#8CA9C6;}
.footer-form input:focus{outline:none;border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(255,107,61,.22);}
.footer-form button{
  min-height:44px;padding:0 18px;border-radius:var(--r-btn);border:none;
  background:var(--c-accent);color:#fff;font-weight:700;font-size:14px;cursor:pointer;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.footer-form button:hover{background:#F2561F;transform:translateY(-1px);}
.footer-form button:active{transform:translateY(0);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);margin-top:44px;padding-top:20px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13.5px;color:#9FBBD8;}
.fb-links{display:flex;gap:18px;}
.fb-links a{font-size:13.5px;color:#AFC6DE;}
.fb-links a:hover{color:var(--c-accent);}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .device-grid,.link-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;}
  .footer-contact-col{grid-column:1/-1;}
}
@media (max-width:991px){
  .facts{grid-template-columns:repeat(2,1fr);gap:22px;}
  .fact{border-right:none;border-bottom:1px solid var(--c-line);padding-bottom:14px;}
  .fact:nth-child(3),.fact:nth-child(4){border-bottom:none;padding-bottom:0;}
  .split{grid-template-columns:1fr;gap:26px;}
  .split-media{order:-1;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
  .cta-band .btn-main{width:100%;justify-content:center;}
  .head-cta .btn-ghost{display:none;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .section.tight{padding:40px 0;}
  .hero-inner{padding:28px 20px;}
  .page-hero{min-height:320px;margin-top:16px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn-main,.hero-actions .btn-line{justify-content:center;}
  .timeline::before{left:21px;}
  .tl-item{grid-template-columns:44px 1fr;gap:16px;padding-bottom:20px;}
  .tl-node{width:44px;height:44px;font-size:14px;}
  .tl-card{padding:20px;}
  .device-grid,.link-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .brand-text .b-sub{display:none;}
  .b-main{font-size:15.5px;}
}
@media (max-width:575px){
  .wrap{padding:0 16px;}
  .facts{grid-template-columns:1fr;}
  .fact{border-bottom:1px solid var(--c-line);padding-bottom:12px;}
  .fact:last-child{border-bottom:none;padding-bottom:0;}
  .btn-main,.btn-ghost,.btn-line{min-height:48px;}
}

/* roulang page: category3 */
:root{
  --c-primary:#2A5C97;
  --c-primary-deep:#17395F;
  --c-accent:#FF6B3D;
  --c-accent-soft:#FFEDE6;
  --c-mint:#2FB6A8;
  --c-ink:#14202C;
  --c-ink-2:#5A6B7C;
  --c-line:#E4EAF1;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-chip:#EAF1FA;
  --r-card:16px;
  --r-media:20px;
  --r-btn:12px;
  --sh-1:0 1px 2px rgba(20,45,80,.04), 0 8px 28px rgba(20,45,80,.08);
  --sh-2:0 4px 8px rgba(20,45,80,.06), 0 16px 40px rgba(20,45,80,.14);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--c-accent);}
h1,h2,h3,h4{margin:0;color:var(--c-ink);line-height:1.34;font-weight:700;}
p{margin:0 0 1em;color:var(--c-ink-2);}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button,input{font:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}

.wrap{max-width:1240px;margin:0 auto;padding:0 20px;}
@media (min-width:1200px){.wrap{max-width:1280px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s var(--ease), background .22s var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 24px rgba(20,45,80,.08);}
.head-top{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0 10px;}
.brand{display:flex;align-items:center;gap:12px;color:var(--c-ink);}
.brand:hover{color:var(--c-ink);}
.brand-mark{
  width:44px;height:44px;flex:0 0 44px;border-radius:14px;
  background:var(--c-primary-deep);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:14px;letter-spacing:.5px;
  box-shadow:var(--sh-1);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.b-main{font-size:17px;font-weight:800;letter-spacing:.2px;}
.b-sub{font-size:12px;color:var(--c-ink-2);}
.head-cta{display:flex;align-items:center;gap:12px;}
.btn-main,.btn-ghost,.btn-accent{
  display:inline-flex;align-items:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  border:1px solid transparent;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), color .2s var(--ease);
}
.btn-main{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}
.btn-main:hover{background:var(--c-primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-main:active{transform:translateY(0);}
.btn-ghost{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-line);}
.btn-ghost:hover{background:var(--c-chip);color:var(--c-primary-deep);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 8px 24px rgba(255,107,61,.28);}
.btn-accent:hover{background:#E8551F;color:#fff;transform:translateY(-1px);box-shadow:0 14px 34px rgba(255,107,61,.34);}
.btn-accent:active{transform:translateY(0);}

.nav-chips{display:flex;gap:10px;overflow-x:auto;padding:6px 0 14px;scrollbar-width:none;}
.nav-chips::-webkit-scrollbar{display:none;}
.nav-chips .chip{
  flex:0 0 auto;height:38px;padding:0 18px;border-radius:999px;
  display:inline-flex;align-items:center;font-size:14px;font-weight:600;
  background:var(--c-chip);color:var(--c-primary);border:1px solid transparent;
  transition:all .2s var(--ease);
}
.nav-chips .chip:hover{background:#DCE8F7;color:var(--c-primary-deep);}
.nav-chips .chip.active{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}

/* ---------- hero band ---------- */
.hero-band{
  position:relative;overflow:hidden;border-bottom:1px solid var(--c-line);
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
}
.hero-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(23,57,95,.88) 0%, rgba(23,57,95,.72) 55%, rgba(23,57,95,.86) 100%);
}
.hero-band .wrap{position:relative;z-index:2;padding-top:56px;padding-bottom:56px;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:18px;flex-wrap:wrap;}
.crumb a{color:rgba(255,255,255,.88);}
.crumb a:hover{color:#fff;}
.crumb i{font-size:10px;opacity:.7;}
.hero-band h1{
  color:#fff;font-size:clamp(28px,4.2vw,44px);font-weight:800;letter-spacing:-.4px;
  max-width:18em;
}
.hero-band .lead{
  color:rgba(255,255,255,.86);font-size:16px;max-width:44em;margin-top:14px;margin-bottom:0;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.hero-tags span{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;font-size:13px;
  background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.24);
}

/* ---------- sections ---------- */
.section{padding:64px 0;}
@media (min-width:992px){.section{padding:80px 0;}}
.sec-head{max-width:760px;margin-bottom:32px;}
.sec-head h2{font-size:clamp(22px,3vw,32px);font-weight:700;}
.sec-head p{margin-top:12px;font-size:15.5px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1px;color:var(--c-primary);
  background:var(--c-chip);padding:6px 14px;border-radius:999px;margin-bottom:14px;
}

.intro-box{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:28px 26px;}
.intro-box p{font-size:15.5px;}
@media (min-width:992px){.intro-box{padding:36px 34px;}}

.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:24px;}
@media (min-width:768px){.stat-grid{grid-template-columns:repeat(4,1fr);}}
.stat{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:20px 18px;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease);
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.stat b{display:block;font-size:26px;font-weight:800;color:var(--c-primary);line-height:1.2;}
.stat span{display:block;font-size:13.5px;color:var(--c-ink-2);margin-top:6px;}

/* ---------- filter bar ---------- */
.filter-bar{display:flex;gap:10px;overflow-x:auto;padding:4px 0 22px;scrollbar-width:none;}
.filter-bar::-webkit-scrollbar{display:none;}
.f-chip{
  flex:0 0 auto;height:40px;padding:0 18px;border-radius:999px;
  display:inline-flex;align-items:center;gap:8px;
  background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-ink-2);
  font-size:14px;font-weight:600;cursor:pointer;
  transition:all .2s var(--ease);
}
.f-chip:hover{border-color:var(--c-primary);color:var(--c-primary);}
.f-chip.is-on{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}
.f-chip .num{font-size:12px;opacity:.72;}

/* ---------- scroll rail ---------- */
.rail{
  display:flex;gap:20px;overflow-x:auto;padding:6px 4px 26px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;
}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:#CFDCEB;border-radius:999px;}
.rail-card{
  flex:0 0 300px;scroll-snap-align:start;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease);
  display:flex;flex-direction:column;
}
@media (min-width:768px){.rail-card{flex:0 0 340px;}}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.rail-card.is-hide{display:none;}
.rail-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease);}
.rail-card:hover .rail-thumb img{transform:scale(1.03);}
.rail-badge{
  position:absolute;top:12px;left:12px;
  padding:4px 12px;border-radius:999px;font-size:12px;font-weight:700;
  background:rgba(23,57,95,.86);color:#fff;
}
.rail-badge.mint{background:var(--c-mint);}
.rail-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rail-body h3{font-size:17px;line-height:1.5;}
.rail-body p{font-size:14px;line-height:1.75;margin:0;}
.rail-meta{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--c-ink-2);}
.rail-meta .tag{
  padding:3px 10px;border-radius:999px;background:var(--c-chip);color:var(--c-primary);font-weight:600;
}
.rail-body .go{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:700;color:var(--c-accent);
}
.rail-body .go:hover{color:#E8551F;gap:12px;}

/* ---------- compare list ---------- */
.compare{display:grid;gap:18px;}
@media (min-width:992px){.compare{grid-template-columns:1fr 1fr;gap:24px;}}
.cmp-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:22px 22px 24px;
  display:flex;gap:16px;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease);
}
.cmp-item:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.cmp-ico{
  width:46px;height:46px;flex:0 0 46px;border-radius:14px;
  background:var(--c-chip);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;
}
.cmp-item h3{font-size:17px;margin-bottom:8px;}
.cmp-item p{font-size:14.2px;margin:0;}
.cmp-item ul{margin-top:12px;display:flex;flex-direction:column;gap:6px;}
.cmp-item ul li{position:relative;padding-left:18px;font-size:14px;color:var(--c-ink-2);}
.cmp-item ul li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--c-mint);
}

/* ---------- trust strip ---------- */
.trust{
  background:var(--c-primary-deep);border-radius:var(--r-card);
  padding:32px 26px;color:#fff;
  display:grid;gap:22px;
}
@media (min-width:768px){.trust{grid-template-columns:repeat(3,1fr);padding:40px 36px;gap:32px;}}
.trust-item i{font-size:20px;color:var(--c-mint);}
.trust-item b{display:block;margin:12px 0 8px;font-size:17px;color:#fff;font-weight:700;}
.trust-item p{color:rgba(255,255,255,.76);font-size:14.2px;margin:0;}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.faq-item:hover{box-shadow:var(--sh-2);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:0;text-align:left;
  font-size:16px;font-weight:700;color:var(--c-ink);cursor:pointer;min-height:56px;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--c-primary);}
.faq-q .caret{
  flex:0 0 28px;width:28px;height:28px;border-radius:50%;
  background:var(--c-chip);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:12px;
  transition:transform .22s var(--ease), background .22s var(--ease);
}
.faq-item.is-open .caret{transform:rotate(180deg);background:var(--c-primary);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
.faq-a .inner{
  padding:0 20px 20px;margin:0 20px 0 20px;
  background:var(--c-bg);border-radius:12px;padding:16px 18px;
  font-size:14.6px;color:var(--c-ink-2);line-height:1.8;
  margin-bottom:18px;
}

/* ---------- cta ---------- */
.cta-box{
  background:var(--c-accent-soft);border:1px solid #FFD9C9;border-radius:var(--r-card);
  padding:34px 26px;text-align:center;
}
@media (min-width:992px){.cta-box{padding:52px 60px;}}
.cta-box h2{font-size:clamp(22px,3vw,32px);}
.cta-box p{margin-top:12px;font-size:15.5px;max-width:52em;margin-left:auto;margin-right:auto;}
.cta-actions{display:flex;flex-direction:column;gap:12px;margin-top:26px;}
@media (min-width:576px){.cta-actions{flex-direction:row;justify-content:center;}}
.cta-actions .btn-main,.cta-actions .btn-ghost{height:48px;padding:0 28px;font-size:16px;width:100%;justify-content:center;}
@media (min-width:576px){.cta-actions .btn-main,.cta-actions .btn-ghost{width:auto;}}

/* ---------- inner links ---------- */
.link-grid{display:grid;gap:18px;}
@media (min-width:576px){.link-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:992px){.link-grid{grid-template-columns:repeat(4,1fr);}}
.link-card{
  display:block;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);padding:22px 20px;color:var(--c-ink);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFDCEB;color:var(--c-ink);}
.link-card i{font-size:18px;color:var(--c-primary);}
.link-card b{display:block;margin:12px 0 8px;font-size:16px;}
.link-card span{font-size:13.6px;color:var(--c-ink-2);display:block;line-height:1.7;}
.link-card .more{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13.5px;font-weight:700;color:var(--c-accent);}

/* ---------- footer ---------- */
.site-footer{background:var(--c-primary-deep);color:rgba(255,255,255,.82);margin-top:64px;padding:56px 0 0;}
.footer-grid{display:grid;gap:32px;}
@media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:36px;}}
@media (min-width:992px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px;}}
.footer-brand .f-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .f-logo b{display:block;color:#fff;font-size:16px;}
.footer-brand .f-logo span{display:block;font-size:12.5px;color:rgba(255,255,255,.62);}
.footer-brand p{color:rgba(255,255,255,.7);font-size:14px;line-height:1.8;margin:0;}
.footer-group{border:0;}
.footer-group summary{
  list-style:none;cursor:pointer;color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;
  display:flex;align-items:center;justify-content:space-between;
}
.footer-group summary::-webkit-details-marker{display:none;}
.footer-group summary::after{content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:11px;color:rgba(255,255,255,.55);}
.footer-group[open] summary::after{content:"\f077";}
.footer-group ul{display:flex;flex-direction:column;gap:10px;}
.footer-group ul a{color:rgba(255,255,255,.72);font-size:14px;}
.footer-group ul a:hover{color:var(--c-accent);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:rgba(255,255,255,.72);line-height:1.7;}
.footer-contact i{color:var(--c-mint);margin-top:5px;}
.footer-form{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap;}
.footer-form input{
  flex:1 1 190px;height:48px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.08);color:#fff;padding:0 16px;font-size:14px;
  transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.footer-form input::placeholder{color:rgba(255,255,255,.5);}
.footer-form input:focus{outline:none;border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(255,107,61,.22);}
.footer-form button{
  height:48px;padding:0 24px;border:0;border-radius:var(--r-btn);
  background:var(--c-accent);color:#fff;font-weight:700;font-size:15px;cursor:pointer;
  transition:background .2s var(--ease), transform .2s var(--ease);
}
.footer-form button:hover{background:#E8551F;transform:translateY(-1px);}
.footer-form button:active{transform:translateY(0);}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.14);
  padding:22px 0 28px;display:flex;flex-direction:column;gap:14px;
  font-size:13.5px;color:rgba(255,255,255,.6);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}
.footer-bottom p{margin:0;color:rgba(255,255,255,.6);}
.fb-links{display:flex;gap:20px;flex-wrap:wrap;}
.fb-links a{color:rgba(255,255,255,.72);}
.fb-links a:hover{color:var(--c-accent);}

@media (max-width:767px){
  .head-top{flex-direction:column;align-items:flex-start;gap:14px;}
  .head-cta{width:100%;}
  .head-cta .btn-ghost,.head-cta .btn-main{flex:1;justify-content:center;padding:0 14px;font-size:14px;}
  .hero-band .wrap{padding-top:40px;padding-bottom:44px;}
  .section{padding:48px 0;}
}

/* roulang page: category4 */
:root{
  --c-primary:#2A5C97;
  --c-primary-deep:#17395F;
  --c-accent:#FF6B3D;
  --c-accent-dark:#E85A2D;
  --c-accent-soft:#FFEDE6;
  --c-mint:#2FB6A8;
  --c-ink:#14202C;
  --c-ink-2:#5A6B7C;
  --c-line:#E4EAF1;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-chip:#EAF1FA;
  --r-card:16px;
  --r-media:20px;
  --r-btn:12px;
  --r-input:12px;
  --sh-1:0 1px 2px rgba(20,45,80,.04), 0 8px 28px rgba(20,45,80,.08);
  --sh-2:0 4px 8px rgba(20,45,80,.06), 0 16px 40px rgba(20,45,80,.14);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
  --t:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
  font-size:15.5px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--t),border-color var(--t),background-color var(--t),transform var(--t),box-shadow var(--t);}
a:hover{color:var(--c-accent);}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0 0 14px;color:var(--c-ink);font-weight:800;line-height:1.32;letter-spacing:.2px;}
ul,ol{margin:0 0 16px;padding-left:20px;}
li{margin-bottom:8px;}
button,input{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
.section{padding:72px 0;}
.section-tight{padding:48px 0;}
@media (max-width:767.98px){.section{padding:48px 0;}.section-tight{padding:36px 0;}}
@media (min-width:1400px){.wrap{max-width:1320px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--t);
}
.site-header.is-stuck{box-shadow:0 2px 6px rgba(20,45,80,.06),0 12px 30px rgba(20,45,80,.07);}
.head-top{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0 10px;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand:hover{color:inherit;}
.brand-mark{
  width:46px;height:46px;border-radius:14px;flex:0 0 auto;
  background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:14px;letter-spacing:.6px;
  box-shadow:var(--sh-1);
}
.brand-text{display:flex;flex-direction:column;line-height:1.3;}
.b-main{font-weight:800;font-size:17px;color:var(--c-ink);}
.b-sub{font-size:12px;color:var(--c-ink-2);}
.head-cta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;
  transition:background-color var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn-main{background:var(--c-accent);color:#fff;box-shadow:0 6px 18px rgba(255,107,61,.28);}
.btn-main:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,107,61,.34);}
.btn-main:active{transform:translateY(0);box-shadow:0 4px 12px rgba(255,107,61,.24);}
.btn-ghost{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-line);}
.btn-ghost:hover{color:var(--c-primary);border-color:#C9DCF2;background:#F9FBFE;transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-ghost:active{transform:translateY(0);}
.btn-lg{min-height:52px;padding:0 30px;font-size:16.5px;border-radius:14px;}
.btn-block{width:100%;}
.nav-chips{
  display:flex;gap:10px;overflow-x:auto;padding:4px 0 14px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.nav-chips::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;
  padding:9px 18px;border-radius:999px;min-height:40px;
  background:var(--c-chip);border:1px solid var(--c-line);
  color:var(--c-ink-2);font-size:14px;font-weight:600;white-space:nowrap;
}
.chip:hover{color:var(--c-primary);border-color:#C9DCF2;transform:translateY(-1px);}
.chip:active{transform:translateY(0);}
.chip.active,.chip.active:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(42,92,151,.24);}

/* ---------- hero ---------- */
.page-hero{
  position:relative;color:#fff;padding:76px 0 68px;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(23,57,95,.80) 0%,rgba(23,57,95,.86) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;background:rgba(255,255,255,.14);
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:18px;}
.crumb a{color:rgba(255,255,255,.9);}
.crumb a:hover{color:#FFD5C6;}
.crumb .sep{opacity:.6;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);
  font-size:13px;font-weight:600;color:#fff;margin-bottom:18px;
}
.page-hero h1{
  color:#fff;font-size:clamp(28px,4.2vw,44px);font-weight:800;
  max-width:900px;margin-bottom:18px;
}
.hero-lead{font-size:16.5px;color:rgba(255,255,255,.9);max-width:800px;line-height:1.85;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px;}
.page-hero .btn-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.4);color:#fff;}
.page-hero .btn-ghost:hover{background:rgba(255,255,255,.22);color:#fff;border-color:#fff;}
.hero-facts{display:flex;flex-wrap:wrap;gap:12px;}
.fact{
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
  border-radius:14px;padding:12px 18px;min-width:170px;
}
.fact b{display:block;font-size:20px;font-weight:800;color:#fff;line-height:1.3;}
.fact span{font-size:13px;color:rgba(255,255,255,.82);}

/* ---------- 通用标题 ---------- */
.sec-head{max-width:760px;margin-bottom:40px;}
.sec-head h2{font-size:clamp(22px,3vw,32px);font-weight:700;}
.sec-head p{color:var(--c-ink-2);font-size:15.5px;margin:10px 0 0;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--c-primary);
  background:var(--c-chip);border-radius:999px;padding:6px 14px;margin-bottom:14px;
}
.kicker i{color:var(--c-accent);}

/* ---------- 交错图文 ---------- */
.zig-row{
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  padding:56px 0;
}
.zig-row + .zig-row{border-top:1px dashed var(--c-line);}
.zig-row.flip .zig-media{order:-1;}
.zig-text h3{font-size:clamp(20px,2.4vw,24px);font-weight:700;margin-bottom:14px;}
.zig-text p{color:var(--c-ink-2);}
.zig-media{position:relative;}
.zig-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-media);box-shadow:var(--sh-1);border:1px solid var(--c-line);
  transition:transform var(--t),box-shadow var(--t);
}
.zig-media:hover img{transform:scale(1.01);box-shadow:var(--sh-2);}
.zig-media .media-note{
  position:absolute;left:16px;bottom:16px;
  background:rgba(23,57,95,.86);color:#fff;font-size:13px;
  padding:8px 14px;border-radius:999px;
}
.dot-list{list-style:none;padding:0;margin:18px 0 0;}
.dot-list li{
  position:relative;padding-left:28px;color:var(--c-ink);font-size:15px;line-height:1.8;
}
.dot-list li::before{
  content:"";position:absolute;left:6px;top:12px;width:9px;height:9px;border-radius:3px;
  background:var(--c-primary);opacity:.85;
}
.dot-list li b{font-weight:700;}
@media (max-width:991.98px){
  .zig-row{grid-template-columns:1fr;gap:26px;padding:40px 0;}
  .zig-row.flip .zig-media{order:0;}
}

/* ---------- 四步流程 ---------- */
.steps-wrap{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-media);box-shadow:var(--sh-1);padding:40px;}
.steps{list-style:none;margin:0;padding:0;counter-reset:st;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.steps li{
  position:relative;background:var(--c-bg);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 20px 22px;margin:0;transition:transform var(--t),box-shadow var(--t);
}
.steps li:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.steps li::before{
  counter-increment:st;content:"0" counter(st);
  display:block;font-size:26px;font-weight:800;color:var(--c-primary);opacity:.28;line-height:1;margin-bottom:12px;
}
.steps li h3{font-size:17px;margin-bottom:8px;}
.steps li p{font-size:14px;color:var(--c-ink-2);margin:0;}
@media (max-width:991.98px){.steps{grid-template-columns:repeat(2,1fr);}.steps-wrap{padding:28px;}}
@media (max-width:575.98px){.steps{grid-template-columns:1fr;}}

/* ---------- 贴士条 ---------- */
.tips-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.tip-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t);
}
.tip-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.tip-card i{color:var(--c-mint);font-size:20px;margin-bottom:12px;display:block;}
.tip-card h3{font-size:17px;}
.tip-card p{font-size:14px;color:var(--c-ink-2);margin:0;}
@media (max-width:767.98px){.tips-strip{grid-template-columns:1fr;}}

/* ---------- FAQ ---------- */
.faq{--bs-accordion-border-color:transparent;--bs-accordion-btn-focus-box-shadow:none;--bs-accordion-active-bg:#F5F8FC;--bs-accordion-active-color:#2A5C97;--bs-accordion-btn-icon:none;--bs-accordion-btn-active-icon:none;max-width:920px;}
.faq .accordion-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  margin-bottom:14px;overflow:hidden;box-shadow:var(--sh-1);
}
.faq .accordion-button{
  background:var(--c-surface);color:var(--c-ink);font-weight:700;font-size:16px;
  padding:20px 22px;box-shadow:none;line-height:1.6;
}
.faq .accordion-button:hover{color:var(--c-primary);}
.faq .accordion-button:not(.collapsed){background:var(--c-chip);color:var(--c-primary);}
.faq .accordion-button::after{
  content:"";width:10px;height:10px;margin-left:auto;flex:0 0 auto;
  border-right:2px solid var(--c-primary);border-bottom:2px solid var(--c-primary);
  background-image:none;transform:rotate(45deg);transition:transform var(--t);border-radius:0;
}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);}
.faq .accordion-body{color:var(--c-ink-2);font-size:15px;line-height:1.85;padding:18px 22px 22px;background:#FBFDFF;}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-accent-soft);border:1px solid #FFD9C9;border-radius:var(--r-media);
  padding:48px 40px;text-align:center;
}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);margin-bottom:10px;}
.cta-band p{color:#7A5245;font-size:15.5px;max-width:660px;margin:0 auto 26px;}
@media (max-width:575.98px){.cta-band{padding:34px 22px;}.cta-band .btn-main{width:100%;}}

/* ---------- 内链区 ---------- */
.links-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.link-card{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--sh-1);color:var(--c-ink);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#C9DCF2;color:var(--c-primary);}
.link-card b{display:block;font-size:16px;font-weight:700;}
.link-card span{display:block;font-size:13.5px;color:var(--c-ink-2);margin-top:4px;}
.link-card i{color:var(--c-accent);font-size:18px;}
@media (max-width:767.98px){.links-grid{grid-template-columns:1fr;}}

/* ---------- footer ---------- */
.site-footer{background:var(--c-primary-deep);color:#D8E3F0;padding:56px 0 0;margin-top:72px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:34px;padding-bottom:40px;}
.footer-brand .f-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{background:#fff;color:var(--c-primary-deep);}
.footer-brand b{display:block;color:#fff;font-size:16.5px;font-weight:800;}
.footer-brand span{font-size:12.5px;color:#9DB6D2;}
.footer-brand p{font-size:14px;line-height:1.8;color:#B9CBE0;margin:0;}
.footer-group summary{
  list-style:none;cursor:pointer;color:#fff;font-weight:700;font-size:15px;margin-bottom:14px;
  display:flex;align-items:center;justify-content:space-between;
}
.footer-group summary::-webkit-details-marker{display:none;}
.footer-group summary::after{content:"\f107";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;color:#9DB6D2;}
.footer-group ul{list-style:none;padding:0;margin:0;}
.footer-group li{margin-bottom:10px;}
.footer-group a{color:#B9CBE0;font-size:14px;}
.footer-group a:hover{color:var(--c-accent);}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:#B9CBE0;}
.footer-contact i{color:var(--c-mint);margin-top:4px;}
.footer-form{display:flex;gap:10px;margin-top:14px;}
.footer-form input{
  flex:1;min-height:44px;padding:0 14px;border-radius:var(--r-input);
  border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.08);color:#fff;font-size:14px;
}
.footer-form input::placeholder{color:#9DB6D2;}
.footer-form input:focus{outline:none;border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(255,107,61,.22);}
.footer-form button{
  min-height:44px;padding:0 18px;border:0;border-radius:var(--r-input);
  background:var(--c-accent);color:#fff;font-weight:700;font-size:14px;cursor:pointer;transition:background-color var(--t),transform var(--t);
}
.footer-form button:hover{background:var(--c-accent-dark);transform:translateY(-1px);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
}
.footer-bottom p{margin:0;font-size:13px;color:#9DB6D2;}
.fb-links{display:flex;gap:18px;flex-wrap:wrap;}
.fb-links a{color:#9DB6D2;font-size:13px;}
.fb-links a:hover{color:var(--c-accent);}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
}
@media (max-width:575.98px){
  .footer-grid{grid-template-columns:1fr;padding-bottom:26px;}
  .footer-form{flex-direction:column;}
  .footer-form input,.footer-form button{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .head-cta{width:100%;}
  .head-cta .btn-main,.head-cta .btn-ghost{flex:1;}
}