/* roulang page: index */
:root{
  --c-bg:#F7F9FC; --c-surface:#FFFFFF; --c-ink:#0F1B2D; --c-ink-2:#4A5A70; --c-ink-3:#8494A8;
  --c-primary:#1D5FBF; --c-primary-deep:#123E7C; --c-primary-soft:#E8F0FB;
  --c-accent:#16B8A6; --c-cta:#FF7A2F; --c-line:#E3EAF3;
  --r-sm:8px; --r-md:12px; --r-lg:16px;
  --sh-1:0 1px 2px rgba(15,27,45,.04);
  --sh-2:0 8px 24px rgba(15,27,45,.06);
  --sh-3:0 16px 40px rgba(29,95,191,.12);
  --gap-sec:88px;
  --bs-primary:#1D5FBF; --bs-body-color:#0F1B2D; --bs-body-bg:#F7F9FC;
  --bs-border-radius:12px; --bs-border-color:#E3EAF3;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--c-bg);color:var(--c-ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.85;letter-spacing:0;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--c-primary)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.4;color:var(--c-ink)}
p{margin:0}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1400px){.container-x{max-width:1320px}}
.sec{padding:var(--gap-sec) 0}
.sec-head{margin-bottom:32px}
.sec-head .marker{display:inline-block;width:22px;height:3px;border-radius:2px;background:var(--c-primary);margin-bottom:14px}
.sec-head h2{font-size:clamp(24px,2.6vw,32px);font-weight:600}
.sec-head .sub{margin-top:12px;color:var(--c-ink-2);font-size:15px;max-width:720px}
.num{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid transparent;transition:border-color .2s ease,box-shadow .2s ease}
.site-header.is-stuck{border-bottom-color:var(--c-line);box-shadow:var(--sh-1)}
.hd-inner{display:flex;align-items:center;justify-content:space-between;min-height:74px;gap:24px}
.brand{font-size:19px;font-weight:700;color:var(--c-ink);letter-spacing:0}
.brand span{color:var(--c-primary)}
.brand:hover{color:var(--c-primary-deep)}
.nav-list{display:flex;align-items:center;gap:32px}
.nav-list a{position:relative;font-size:15px;color:var(--c-ink-2);padding:6px 0}
.nav-list a::after{content:"";position:absolute;left:0;right:auto;bottom:0;width:0;height:2px;background:var(--c-primary);transition:width .2s ease-out}
.nav-list a:hover{color:var(--c-ink)}
.nav-list a:hover::after,.nav-list a.is-active::after{width:100%}
.nav-list a.is-active{color:var(--c-ink);font-weight:600}
.nav-toggle{display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 14px;border:1px solid var(--c-line);border-radius:10px;background:#fff;color:var(--c-ink-2);font-size:14px}
.nav-panel{padding-bottom:16px}
.nav-panel .nav-list{flex-direction:column;align-items:flex-start;gap:0;width:100%}
.nav-panel .nav-list li{width:100%;border-bottom:1px solid var(--c-line)}
.nav-panel .nav-list a{display:block;padding:14px 2px;font-size:15px}
@media (min-width:992px){
  .nav-toggle{display:none}
  .nav-panel.collapse{display:flex !important;padding-bottom:0}
  .nav-panel .nav-list{flex-direction:row;align-items:center;gap:32px}
  .nav-panel .nav-list li{width:auto;border-bottom:0}
  .nav-panel .nav-list a{display:inline-block;padding:6px 0}
}

/* ---------- hero ---------- */
.hero{position:relative;padding:64px 0 72px;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(247,249,252,.94),rgba(247,249,252,.86))}
.hero .container-x{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(30px,4.2vw,46px);line-height:1.25;font-weight:700;max-width:14em}
.hero .lead{margin-top:20px;font-size:17px;color:var(--c-ink-2);max-width:32em}
.hero-cta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:32px}
.btn-main{display:inline-flex;align-items:center;justify-content:center;gap:9px;height:48px;padding:0 26px;border:0;border-radius:10px;background:var(--c-cta);color:#fff;font-size:16px;font-weight:600;box-shadow:0 8px 20px rgba(255,122,47,.24);transition:filter .18s ease,transform .18s ease,box-shadow .18s ease}
.btn-main:hover{color:#fff;filter:brightness(1.04);transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,122,47,.3)}
.btn-main:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.16)}
.btn-line{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 22px;border:1px solid var(--c-line);border-radius:10px;background:#fff;color:var(--c-ink);font-size:15px;font-weight:600;transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease}
.btn-line:hover{border-color:rgba(29,95,191,.32);color:var(--c-primary);transform:translateY(-1px);box-shadow:var(--sh-1)}
.btn-text{display:inline-flex;align-items:center;gap:8px;color:var(--c-primary);font-weight:600;font-size:15px}
.btn-text i{transition:transform .18s ease}
.btn-text:hover i{transform:translateX(4px)}
.hero-visual{border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-3);background:#fff}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 12px;border-radius:999px;border:1px solid var(--c-line);background:#fff;color:var(--c-ink-2);font-size:13px}
.tag.soft{background:var(--c-primary-soft);border-color:transparent;color:var(--c-primary-deep)}

/* ---------- trust bar ---------- */
.trust{border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);background:#fff}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.trust-item{padding:22px 24px;border-left:1px solid var(--c-line)}
.trust-item:first-child{border-left:0}
.trust-item .k{font-size:13px;color:var(--c-ink-3)}
.trust-item .v{margin-top:6px;font-size:15px;font-weight:600;font-variant-numeric:tabular-nums}
@media (max-width:767px){
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .trust-item{border-top:1px solid var(--c-line)}
  .trust-item:nth-child(odd){border-left:0}
  .trust-item:nth-child(-n+2){border-top:0}
}

/* ---------- carousel ---------- */
.shots{background:#fff}
.carousel-frame{aspect-ratio:16/10;border-radius:var(--r-lg);border:1px solid var(--c-line);overflow:hidden;box-shadow:var(--sh-2);background:var(--c-bg)}
.carousel-frame img{width:100%;height:100%;object-fit:cover}
.shot-caption{margin-top:18px;font-size:14px;color:var(--c-ink-2);text-align:center}
.carousel-indicators{position:static;margin:22px 0 0}
.carousel-indicators [data-bs-target]{width:34px;height:4px;border-radius:999px;background:#C9D6E6;border:0;opacity:1;margin:0 4px}
.carousel-indicators .active{background:var(--c-primary)}
.carousel-control-prev,.carousel-control-next{width:36px;height:36px;border-radius:50%;border:1px solid var(--c-line);background:#fff;top:calc(50% - 30px);opacity:1;box-shadow:var(--sh-1)}
.carousel-control-prev{left:-18px}.carousel-control-next{right:-18px}
.carousel-control-prev i,.carousel-control-next i{color:var(--c-ink-2);font-size:13px}
.carousel-control-prev:hover,.carousel-control-next:hover{border-color:rgba(29,95,191,.32)}
@media (max-width:991px){.carousel-control-prev,.carousel-control-next{display:none}}

/* ---------- bento ---------- */
.bento{display:grid;gap:24px;grid-template-columns:repeat(12,1fr)}
.bento-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:28px;transition:box-shadow .18s ease,border-color .18s ease,transform .18s ease}
.bento-item:hover{box-shadow:var(--sh-2);border-color:rgba(29,95,191,.28);transform:translateY(-2px)}
.bento-item .ico{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;background:var(--c-primary-soft);color:var(--c-primary)}
.bento-item .ico svg{width:24px;height:24px}
.bento-item h3{margin-top:20px;font-size:19px}
.bento-item p{margin-top:10px;font-size:15px;color:var(--c-ink-2)}
.b-a{grid-column:span 7;display:flex;gap:26px;align-items:center}
.b-b{grid-column:span 5}
.b-c{grid-column:span 5}
.b-d{grid-column:span 7;display:flex;gap:26px;align-items:center}
.b-a .thumb,.b-d .thumb{flex:0 0 42%;border-radius:var(--r-sm);overflow:hidden;border:1px solid var(--c-line)}
.b-a .thumb img,.b-d .thumb img{width:100%;aspect-ratio:16/11;object-fit:cover}
@media (max-width:991px){
  .bento{grid-template-columns:1fr}
  .b-a,.b-b,.b-c,.b-d{grid-column:span 1}
  .b-a,.b-d{flex-direction:column;align-items:flex-start}
  .b-a .thumb,.b-d .thumb{flex:none;width:100%}
}

/* ---------- system requirements ---------- */
.specs{background:#fff}
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px}
.spec-row{display:grid;grid-template-columns:150px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid var(--c-line)}
.spec-row dt{font-size:14px;color:var(--c-ink-3);font-weight:400;margin:0}
.spec-row dd{margin:0;font-size:15px;color:var(--c-ink)}
@media (max-width:767px){.spec-grid{grid-template-columns:1fr}.spec-row{grid-template-columns:1fr;gap:4px}}

/* ---------- latest posts ---------- */
.posts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;height:100%;transition:box-shadow .18s ease,border-color .18s ease,transform .18s ease}
.post-card:hover{box-shadow:var(--sh-2);border-color:rgba(29,95,191,.28);transform:translateY(-2px)}
.post-thumb{border-bottom:1px solid var(--c-line)}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.post-body{padding:22px 24px 24px}
.badge-soft{display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;background:var(--c-primary-soft);color:var(--c-primary-deep);font-size:12.5px;font-weight:600}
.post-title{margin-top:14px;font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-sum{margin-top:10px;font-size:14px;color:var(--c-ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{display:flex;align-items:center;justify-content:space-between;margin-top:18px;padding-top:14px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-ink-3)}
.post-meta .go{color:var(--c-primary);font-weight:600}
.empty-state{text-align:center;padding:56px 24px;background:#fff;border:1px dashed var(--c-line);border-radius:var(--r-md)}
.empty-state svg{width:34px;height:34px;color:var(--c-ink-3)}
.empty-state p{margin-top:14px;color:var(--c-ink-2);font-size:15px}
.empty-state .links{margin-top:16px;display:flex;flex-wrap:wrap;gap:18px;justify-content:center}
@media (max-width:991px){.posts-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:575px){.posts-grid{grid-template-columns:1fr}}

/* ---------- reviews ---------- */
.reviews{background:#fff}
.review-grid{columns:2;column-gap:24px}
@media (max-width:767px){.review-grid{columns:1}}
.review-card{break-inside:avoid;margin-bottom:24px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:26px 28px}
.review-card .quote{font-size:30px;line-height:1;color:var(--c-primary-soft);font-weight:700}
.review-card p{margin-top:8px;font-size:15px;color:var(--c-ink-2)}
.review-foot{display:flex;align-items:center;justify-content:space-between;margin-top:18px;padding-top:14px;border-top:1px solid var(--c-line)}
.review-foot .who{font-size:14px;font-weight:600;color:var(--c-ink)}
.stars{color:#F5A623;font-size:12.5px;letter-spacing:2px}

/* ---------- download ---------- */
.download{position:relative;background-image:url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.download::before{content:"";position:absolute;inset:0;background:rgba(247,249,252,.86)}
.download .container-x{position:relative;z-index:2}
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.dl-btn{display:flex;align-items:center;gap:12px;height:60px;padding:0 20px;border-radius:12px;border:1px solid var(--c-line);background:#fff;font-size:15px;font-weight:600;color:var(--c-ink);transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease}
.dl-btn i{color:var(--c-primary);font-size:18px}
.dl-btn:hover{border-color:rgba(29,95,191,.32);transform:translateY(-2px);box-shadow:var(--sh-2);color:var(--c-primary-deep)}
.dl-btn.primary{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:var(--sh-3)}
.dl-btn.primary i{color:#fff}
.dl-btn.primary:hover{filter:brightness(1.04);color:#fff}
.dl-foot{display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:center;margin-top:32px}
.qr-box{width:112px;height:112px;border:1px solid var(--c-line);border-radius:var(--r-sm);background:#fff;display:flex;align-items:center;justify-content:center;color:var(--c-ink-3);font-size:12px;text-align:center;padding:10px}
.form-box{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:24px 28px}
.form-box h3{font-size:17px}
.form-row{display:flex;gap:12px;margin-top:16px;flex-wrap:wrap}
.form-row input{flex:1 1 240px;height:44px;padding:0 16px;border:1px solid var(--c-line);border-radius:10px;font-size:15px;background:#fff;color:var(--c-ink)}
.form-row input:focus{border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(29,95,191,.08);outline:none}
.form-row button{height:44px;padding:0 24px;border:0;border-radius:10px;background:var(--c-cta);color:#fff;font-size:15px;font-weight:600}
.form-row button:hover{filter:brightness(1.04)}
.form-msg{margin-top:12px;font-size:13.5px;color:var(--c-accent);min-height:20px}
.form-tip{margin-top:8px;font-size:13px;color:var(--c-ink-3)}
@media (max-width:991px){.dl-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:575px){.dl-grid{grid-template-columns:1fr}.dl-foot{grid-template-columns:1fr}}

/* ---------- faq ---------- */
.faq-list{max-width:900px}
.accordion-item{border:1px solid var(--c-line);border-radius:var(--r-md) !important;background:#fff;margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-1)}
.accordion-button{position:relative;padding:20px 60px 20px 22px;font-size:16px;font-weight:600;color:var(--c-ink);background:#fff;border:0}
.accordion-button:not(.collapsed){color:var(--c-primary-deep);background:#fff;box-shadow:none;border-left:2px solid var(--c-primary)}
.accordion-button:focus{box-shadow:none;outline:none}
.accordion-button::after{display:none}
.accordion-button::before{content:"";position:absolute;right:24px;top:50%;width:14px;height:2px;background:var(--c-ink-3);transform:translateY(-50%)}
.accordion-button .plus{position:absolute;right:29.5px;top:50%;width:2px;height:14px;background:var(--c-ink-3);transform:translateY(-50%);transition:transform .22s ease-out}
.accordion-button:not(.collapsed)::before{background:var(--c-primary)}
.accordion-button:not(.collapsed) .plus{transform:translateY(-50%) scaleY(0);background:var(--c-primary)}
.accordion-body{padding:0 22px 22px;font-size:15px;color:var(--c-ink-2);border-left:2px solid var(--c-primary)}

/* ---------- footer ---------- */
.site-footer{background:var(--c-bg);border-top:1px solid var(--c-line);padding:64px 0 0}
.ft-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px}
.ft-brand .brand{font-size:18px}
.ft-brand p{margin-top:14px;font-size:14px;color:var(--c-ink-2);max-width:28em}
.ft-col h4{font-size:15px;font-weight:600}
.ft-col ul{margin-top:16px;display:flex;flex-direction:column;gap:11px}
.ft-col a,.ft-col span{font-size:14px;color:var(--c-ink-2)}
.ft-col a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px}
.ft-bottom{margin-top:56px;border-top:1px solid var(--c-line);padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13.5px;color:var(--c-ink-3)}
@media (max-width:991px){.ft-grid{grid-template-columns:1fr 1fr}}
@media (max-width:575px){.ft-grid{grid-template-columns:1fr;gap:32px}}

@media (max-width:991px){:root{--gap-sec:64px}.hero-grid{grid-template-columns:1fr;gap:36px}}
@media (max-width:575px){:root{--gap-sec:52px}.container-x{padding:0 20px}.hero{padding:44px 0 52px}}

/* roulang page: article */
:root{
  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-ink:#0F1B2D;
  --c-ink-2:#4A5A70;
  --c-ink-3:#8494A8;
  --c-primary:#1D5FBF;
  --c-primary-deep:#123E7C;
  --c-primary-soft:#E8F0FB;
  --c-accent:#16B8A6;
  --c-cta:#FF7A2F;
  --c-line:#E3EAF3;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --sh-1:0 1px 2px rgba(15,27,45,.04);
  --sh-2:0 8px 24px rgba(15,27,45,.06);
  --sh-3:0 16px 40px rgba(29,95,191,.12);
  --bs-primary:#1D5FBF;
  --bs-primary-rgb:29,95,191;
  --bs-body-color:#0F1B2D;
  --bs-body-bg:#F7F9FC;
  --bs-border-color:#E3EAF3;
  --bs-border-radius:12px;
  --bs-link-color:#1D5FBF;
  --bs-link-hover-color:#123E7C;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.85;
  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 .18s ease-out;}
a:hover{color:var(--c-primary-deep);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--c-ink);letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1400px){.container-x{max-width:1320px;}}
.sec{padding:88px 0;}
@media (max-width:991px){.sec{padding:64px 0;}}
@media (max-width:575px){.sec{padding:52px 0;}}
.sec-head{margin-bottom:32px;}
.sec-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-primary);
  margin-bottom:10px;
}
.sec-tag::before{content:"";width:16px;height:2px;border-radius:2px;background:var(--c-primary);}
.sec-title{font-size:clamp(24px,2.6vw,32px);line-height:1.35;font-weight:600;}
.sec-desc{margin-top:10px;font-size:15px;color:var(--c-ink-2);max-width:760px;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:var(--sh-1);}
.hd-inner{
  display:flex;align-items:center;justify-content:space-between;
  min-height:74px;gap:20px;
}
.brand{
  display:inline-flex;align-items:baseline;gap:2px;
  font-size:19px;font-weight:700;color:var(--c-ink);letter-spacing:0;
}
.brand span{font-weight:600;color:var(--c-primary);font-size:15px;}
.brand:hover{color:var(--c-ink);}
.nav-panel{flex:1 1 auto;display:flex;justify-content:flex-end;}
.nav-list{display:flex;align-items:center;gap:32px;}
.nav-list li a{
  position:relative;display:inline-block;
  font-size:15px;color:var(--c-ink-2);padding:6px 0;
}
.nav-list li a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;
  height:2px;border-radius:2px;background:var(--c-primary);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .2s ease-out;
}
.nav-list li a:hover{color:var(--c-ink);}
.nav-list li a:hover::after{transform:scaleX(1);}
.nav-list li a.is-active{color:var(--c-ink);font-weight:600;}
.nav-list li a.is-active::after{transform:scaleX(1);}
.nav-toggle{
  display:none;align-items:center;gap:6px;
  background:transparent;border:1px solid var(--c-line);
  border-radius:var(--r-sm);color:var(--c-ink-2);
  padding:8px 12px;font-size:14px;
}
.nav-toggle:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
@media (max-width:991px){
  .hd-inner{flex-wrap:wrap;min-height:66px;}
  .nav-toggle{display:inline-flex;}
  .nav-panel{
    flex-basis:100%;display:block;
    border-top:1px solid var(--c-line);
  }
  .nav-panel.collapse:not(.show){display:none;}
  .nav-list{flex-direction:column;align-items:flex-start;gap:0;padding:8px 0 14px;}
  .nav-list li{width:100%;border-bottom:1px solid var(--c-line);}
  .nav-list li:last-child{border-bottom:0;}
  .nav-list li a{display:block;width:100%;padding:12px 2px;font-size:15px;}
  .nav-list li a::after{display:none;}
  .nav-list li a.is-active{color:var(--c-primary);}
}

/* ============ 面包屑 + 文章头部 ============ */
.page-hero{
  position:relative;
  border-bottom:1px solid var(--c-line);
  background-image:linear-gradient(rgba(247,249,252,.90),rgba(247,249,252,.96)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--c-ink-3);padding:22px 0 0;
}
.crumb a{color:var(--c-ink-2);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{color:var(--c-ink-3);}
.crumb .cur{
  color:var(--c-ink-3);max-width:520px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.art-head{padding:22px 0 40px;max-width:860px;}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:13px;font-weight:600;
}
.art-h1{
  margin-top:16px;
  font-size:clamp(24px,3.4vw,34px);
  line-height:1.35;font-weight:700;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:20px;padding-top:18px;
  border-top:1px solid var(--c-line);
  font-size:13.5px;color:var(--c-ink-3);
}
.meta-row i{color:var(--c-primary);margin-right:6px;}
.meta-row .vnum{font-variant-numeric:tabular-nums;}

/* ============ 正文布局 ============ */
.art-wrap{padding:56px 0 72px;}
.art-grid{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:48px;align-items:start;}
@media (max-width:1199px){
  .art-grid{grid-template-columns:minmax(0,1fr);gap:36px;}
}
.art-panel{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:40px 44px 44px;
}
@media (max-width:575px){.art-panel{padding:26px 20px 30px;}}
.article-body{max-width:780px;font-size:16.5px;line-height:1.9;color:var(--c-ink-2);}
.article-body p{margin:0 0 18px;}
.article-body h2{
  margin:40px 0 16px;padding-left:14px;
  font-size:22px;line-height:1.5;font-weight:600;color:var(--c-ink);
  border-left:3px solid var(--c-primary);
}
.article-body h3{margin:28px 0 12px;font-size:18.5px;font-weight:600;color:var(--c-ink);}
.article-body strong{color:var(--c-ink);}
.article-body a{color:var(--c-primary);border-bottom:1px solid rgba(29,95,191,.32);}
.article-body a:hover{border-bottom-color:var(--c-primary);}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:4px;}
.article-body ul li,.article-body ol li{position:relative;padding-left:20px;margin-bottom:10px;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:11px;
  width:6px;height:6px;border-radius:50%;background:var(--c-primary);
}
.article-body ol{counter-reset:li;}
.article-body ol li{counter-increment:li;}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:2px;
  width:20px;height:20px;line-height:20px;text-align:center;
  font-size:12px;font-weight:700;color:var(--c-primary);
}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;
  background:#F2F6FC;border-left:3px solid var(--c-primary);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--c-ink-2);font-size:15.5px;
}
.article-body img{
  width:100%;height:auto;border-radius:var(--r-md);
  margin:22px 0 6px;
}
.article-body figure{margin:22px 0;}
.article-body figcaption{font-size:13px;color:var(--c-ink-3);text-align:center;margin-top:4px;}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;}
.article-body th,.article-body td{
  border:1px solid var(--c-line);padding:10px 14px;text-align:left;
}
.article-body th{background:var(--c-primary-soft);color:var(--c-ink);font-weight:600;}

/* 空态 */
.empty-state{
  text-align:center;padding:64px 20px;
  border:1px dashed var(--c-line);border-radius:var(--r-md);
  background:#FBFCFE;
}
.empty-state i{font-size:34px;color:var(--c-ink-3);}
.empty-state h2{margin:16px 0 8px;font-size:20px;font-weight:600;}
.empty-state p{color:var(--c-ink-2);font-size:15px;margin-bottom:20px;}

/* ============ 侧栏 ============ */
.side{display:flex;flex-direction:column;gap:22px;}
@media (min-width:1200px){
  .side{position:sticky;top:98px;}
}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);
  padding:22px 22px 18px;
}
.side-card h2,.side-card h3{
  font-size:15px;font-weight:600;color:var(--c-ink);
  padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--c-line);
  display:flex;align-items:center;gap:8px;
}
.side-card h2 i,.side-card h3 i{color:var(--c-primary);}
.toc-list li{margin-bottom:2px;}
.toc-list a{
  display:block;position:relative;
  padding:8px 0 8px 14px;font-size:14px;color:var(--c-ink-2);
  line-height:1.6;
}
.toc-list a::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;
  width:2px;border-radius:2px;background:transparent;transition:background .2s;
}
.toc-list a:hover{color:var(--c-primary);}
.toc-list a.is-active{color:var(--c-ink);font-weight:600;}
.toc-list a.is-active::before{background:var(--c-primary);}
.hot-list li{
  display:flex;gap:12px;padding:11px 0;
  border-bottom:1px dashed var(--c-line);
}
.hot-list li:last-child{border-bottom:0;padding-bottom:2px;}
.hot-num{
  flex:0 0 22px;height:22px;line-height:22px;text-align:center;
  border-radius:var(--r-sm);background:var(--c-primary-soft);
  color:var(--c-primary);font-size:12px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.hot-list a{font-size:14.5px;color:var(--c-ink-2);line-height:1.6;}
.hot-list a:hover{color:var(--c-primary);}
.hot-time{display:block;font-size:12.5px;color:var(--c-ink-3);margin-top:4px;}
.mini-card{
  background:linear-gradient(180deg,#0F2A52 0%,#123E7C 100%);
  border-radius:var(--r-md);padding:24px 22px;color:#E9F0FA;
  border:1px solid rgba(255,255,255,.08);
}
.mini-card h3{color:#fff;font-size:16px;font-weight:600;margin-bottom:10px;}
.mini-card p{font-size:14px;color:rgba(233,240,250,.78);margin-bottom:18px;line-height:1.75;}
.btn-mini{
  display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 20px;border-radius:10px;
  background:var(--c-cta);color:#fff;font-size:14.5px;font-weight:600;
  transition:transform .18s ease-out,filter .18s ease-out;
}
.btn-mini:hover{color:#fff;filter:brightness(1.06);transform:translateY(-1px);}
.btn-mini:active{transform:translateY(0);}
.btn-mini:focus-visible{outline:2px solid #fff;outline-offset:2px;}

/* ============ 标签 / 上下篇 / 相关推荐 ============ */
.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:36px;padding-top:26px;border-top:1px solid var(--c-line);
}
.tag-row .label{font-size:13.5px;color:var(--c-ink-3);margin-right:2px;}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:999px;border:1px solid var(--c-line);
  font-size:13.5px;color:var(--c-ink-2);background:#fff;
  transition:border-color .18s ease-out,color .18s ease-out,background .18s ease-out;
}
.tag:hover{border-color:rgba(29,95,191,.4);color:var(--c-primary);background:var(--c-primary-soft);}
.post-nav{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  margin-top:26px;border:1px solid var(--c-line);border-radius:var(--r-md);
  background:var(--c-surface);overflow:hidden;box-shadow:var(--sh-1);
}
.post-nav a{
  padding:20px 22px;display:block;
  border-right:1px solid var(--c-line);
  transition:background .18s ease-out;
}
.post-nav a:last-child{border-right:0;text-align:right;}
.post-nav a:hover{background:#FBFCFE;}
.pn-label{display:block;font-size:12.5px;color:var(--c-ink-3);margin-bottom:6px;}
.pn-title{font-size:15px;font-weight:600;color:var(--c-ink);line-height:1.6;}
.post-nav a:hover .pn-title{color:var(--c-primary);}
@media (max-width:575px){
  .post-nav{grid-template-columns:1fr;}
  .post-nav a{border-right:0;border-bottom:1px solid var(--c-line);text-align:left;}
  .post-nav a:last-child{border-bottom:0;}
}

.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:991px){.rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:575px){.rel-grid{grid-template-columns:1fr;}}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.rel-card:nth-child(2){margin-top:20px;}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(29,95,191,.28);}
.rel-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--c-primary-soft);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;}
.rel-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.rel-body h3{font-size:16.5px;font-weight:600;line-height:1.55;}
.rel-body p{font-size:14px;color:var(--c-ink-2);line-height:1.8;}
.rel-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:12.5px;color:var(--c-ink-3);}
.rel-link{font-size:14px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px;}
@media (max-width:575px){.rel-card:nth-child(2){margin-top:0;}}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;
  background-image:linear-gradient(rgba(247,249,252,.86),rgba(247,249,252,.92)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:24px;padding:44px 0;
}
.cta-inner h2{font-size:clamp(20px,2.2vw,26px);font-weight:600;line-height:1.4;}
.cta-inner p{margin-top:8px;font-size:14.5px;color:var(--c-ink-2);max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:10px;
  font-size:15.5px;font-weight:600;border:1px solid transparent;
  transition:transform .18s ease-out,filter .18s ease-out,box-shadow .18s ease-out,background .18s ease-out,border-color .18s ease-out;
}
.btn-x.primary{background:var(--c-cta);color:#fff;box-shadow:0 8px 20px rgba(255,122,47,.24);}
.btn-x.primary:hover{color:#fff;filter:brightness(1.05);transform:translateY(-1px);}
.btn-x.primary:active{transform:translateY(0);box-shadow:inset 0 2px 4px rgba(0,0,0,.12);}
.btn-x.ghost{background:transparent;border-color:var(--c-line);color:var(--c-ink);}
.btn-x.ghost:hover{border-color:rgba(29,95,191,.4);color:var(--c-primary);background:#fff;transform:translateY(-1px);}
.btn-x:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
@media (max-width:575px){
  .btn-x{width:100%;height:46px;}
  .cta-actions{width:100%;}
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-bg);
  border-top:1px solid var(--c-line);
  padding:64px 0 26px;
}
.ft-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
@media (max-width:991px){.ft-grid{grid-template-columns:1fr 1fr;gap:32px;}}
@media (max-width:575px){.ft-grid{grid-template-columns:1fr;gap:26px;}}
.ft-brand p{margin-top:14px;font-size:14px;color:var(--c-ink-2);line-height:1.8;max-width:340px;}
.ft-col h4{font-size:14.5px;font-weight:600;color:var(--c-ink);margin-bottom:16px;}
.ft-col ul li{margin-bottom:10px;}
.ft-col ul li a,.ft-col ul li span{font-size:14px;color:var(--c-ink-2);position:relative;}
.ft-col ul li a:hover{color:var(--c-primary);}
.ft-col ul li a:hover::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--c-primary);
}
.ft-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px;margin-top:48px;padding-top:20px;
  border-top:1px solid var(--c-line);
  font-size:13.5px;color:var(--c-ink-3);
}
@media (max-width:575px){.ft-bottom{flex-direction:column;align-items:flex-start;}}

/* roulang page: category1 */
:root{
  --bs-primary:#1D5FBF;
  --bs-body-color:#0F1B2D;
  --bs-body-bg:#F7F9FC;
  --bs-border-color:#E3EAF3;
  --bs-border-radius:12px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;

  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-ink:#0F1B2D;
  --c-ink-2:#4A5A70;
  --c-ink-3:#8494A8;
  --c-primary:#1D5FBF;
  --c-primary-deep:#123E7C;
  --c-primary-soft:#E8F0FB;
  --c-accent:#16B8A6;
  --c-cta:#FF7A2F;
  --c-line:#E3EAF3;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --sh-1:0 1px 2px rgba(15,27,45,.04);
  --sh-2:0 8px 24px rgba(15,27,45,.06);
  --sh-3:0 16px 40px rgba(29,95,191,.12);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  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}
a:hover{color:var(--c-primary-deep)}
button{font:inherit}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:600;letter-spacing:0}
p{margin:0}
ul{margin:0;padding:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1400px){.container-x{max-width:1320px}}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--c-line);
  box-shadow:var(--sh-1);
}
.hd-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px;flex-wrap:wrap;padding:10px 0}
.brand{font-size:19px;font-weight:700;color:var(--c-ink);text-decoration:none;display:inline-flex;align-items:baseline;gap:2px;line-height:1.2}
.brand span{color:var(--c-primary)}
.brand:hover{color:var(--c-ink)}
.nav-panel{display:block}
.nav-list{display:flex;align-items:center;gap:32px;list-style:none;margin:0;padding:0}
.nav-list a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--c-ink-2);text-decoration:none;transition:color .18s ease-out;
}
.nav-list a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;border-radius:2px;
  background:var(--c-primary);transition:width .22s ease-out;
}
.nav-list a:hover{color:var(--c-primary)}
.nav-list a:hover::after{width:100%}
.nav-list a.is-active{color:var(--c-primary);font-weight:600}
.nav-list a.is-active::after{width:100%}
.nav-toggle{
  display:none;align-items:center;gap:8px;
  height:42px;padding:0 16px;border:1px solid var(--c-line);border-radius:10px;
  background:#fff;color:var(--c-ink-2);font-size:14px;font-weight:600;cursor:pointer;
  transition:border-color .18s ease-out,color .18s ease-out;
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}

@media (max-width:991px){
  .hd-inner{min-height:66px}
  .nav-toggle{display:inline-flex}
  .nav-panel{width:100%;flex-basis:100%}
  .nav-panel.collapse:not(.show){display:none}
  .nav-panel.show,.nav-panel.collapsing{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;margin-top:8px;border-top:1px solid var(--c-line)}
  .nav-list li{width:100%}
  .nav-list a{display:block;padding:13px 2px;border-bottom:1px solid var(--c-line);font-size:15px}
  .nav-list a::after{display:none}
  .nav-list a.is-active{font-weight:600}
}

/* ---------- 通用板块 ---------- */
.sec{padding:88px 0}
.sec-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
@media (max-width:991px){.sec{padding:64px 0}}
@media (max-width:575px){.sec{padding:52px 0}}

.sec-head{max-width:740px;margin-bottom:40px}
.sec-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-primary)}
.sec-tag::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--c-primary)}
.sec-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.35;font-weight:600;margin:14px 0 12px}
.sec-head p{color:var(--c-ink-2);font-size:16px;line-height:1.85}
@media (max-width:575px){.sec-head{margin-bottom:28px}}
.sec-head-center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head-center .sec-tag{justify-content:center}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:18px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-3);list-style:none;margin:0;padding:0}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li:not(:last-child)::after{content:"/";color:var(--c-line)}
.crumb a{color:var(--c-ink-3)}
.crumb a:hover{color:var(--c-primary)}
.crumb .is-now{color:var(--c-ink-2);font-weight:600}

/* ---------- 首屏 ---------- */
.page-hero{
  position:relative;
  padding:44px 0 72px;
  background-image:linear-gradient(rgba(247,249,252,.90),rgba(247,249,252,.95)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-line);
}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:center;margin-top:26px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;background:var(--c-primary-soft);
  color:var(--c-primary-deep);font-size:13px;font-weight:600;border:1px solid rgba(29,95,191,.16);
}
.hero-grid h1{font-size:clamp(30px,4.2vw,46px);line-height:1.25;font-weight:700;margin:20px 0 16px}
.hero-sub{font-size:17px;color:var(--c-ink-2);max-width:560px;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:30px}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--c-primary)}
.link-arrow i{font-size:13px;transition:transform .18s ease-out}
.link-arrow:hover i{transform:translateX(4px)}
.hero-visual{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-2);background:#fff;
}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-visual figcaption{padding:14px 18px;font-size:13px;color:var(--c-ink-3);border-top:1px solid var(--c-line)}
@media (max-width:991px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .page-hero{padding:32px 0 56px}
}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;margin-top:-38px;position:relative;z-index:2;
}
.stat-strip > div{padding:22px 24px;border-right:1px solid var(--c-line)}
.stat-strip > div:last-child{border-right:none}
.stat-strip dt{font-size:13px;color:var(--c-ink-3);margin-bottom:4px}
.stat-strip dd{margin:0;font-size:17px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--c-ink)}
@media (max-width:767px){
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:-24px}
  .stat-strip > div:nth-child(2){border-right:none}
  .stat-strip > div:nth-child(1),.stat-strip > div:nth-child(2){border-bottom:1px solid var(--c-line)}
}

/* ---------- 图文交错清单流 ---------- */
.flow-list{margin-top:8px;border-top:1px solid var(--c-line)}
.flow-row{
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:44px;align-items:center;padding:38px 0;border-bottom:1px solid var(--c-line);
}
.flow-row.is-rev .flow-media{order:2}
.flow-row.is-rev .flow-body{order:1}
.flow-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid var(--c-line);box-shadow:var(--sh-2);transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.flow-row:hover .flow-media img{transform:translateY(-2px);box-shadow:var(--sh-3)}
.flow-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:12px}
.badge-x{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:var(--c-primary-soft);color:var(--c-primary-deep);border:1px solid rgba(29,95,191,.16);
}
.badge-x.is-soft{background:#E9F8F6;color:#0F7C70;border-color:rgba(22,184,166,.22)}
.flow-time{font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums}
.flow-body h3{font-size:21px;line-height:1.5;font-weight:600;margin-bottom:10px}
.flow-body p{color:var(--c-ink-2);font-size:15.5px}
.flow-points{list-style:none;display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:16px}
.flow-points li{position:relative;padding-left:16px;font-size:14px;color:var(--c-ink-2)}
.flow-points li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--c-accent);
}
.flow-body .link-arrow{margin-top:18px}
@media (max-width:991px){
  .flow-row{grid-template-columns:1fr;gap:22px;padding:30px 0}
  .flow-row.is-rev .flow-media{order:0}
  .flow-row.is-rev .flow-body{order:0}
}

/* ---------- 页码占位 ---------- */
.pager{display:flex;align-items:center;justify-content:center;gap:10px;padding:36px 0 4px;flex-wrap:wrap}
.pager a,.pager span{
  min-width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  padding:0 14px;border:1px solid var(--c-line);border-radius:10px;background:#fff;
  font-size:14px;color:var(--c-ink-2);font-variant-numeric:tabular-nums;
  transition:border-color .18s ease-out,color .18s ease-out,transform .18s ease-out;
}
.pager a:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px)}
.pager .is-current{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600}

/* ---------- 准备事项 ---------- */
.notes-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:32px;align-items:start}
.num-list{list-style:none;counter-reset:n;margin:0;padding:0}
.num-list li{
  position:relative;counter-increment:n;
  padding:0 0 22px 60px;margin-bottom:22px;border-bottom:1px solid var(--c-line);
}
.num-list li:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.num-list li::before{
  content:counter(n,decimal-leading-zero);
  position:absolute;left:0;top:2px;width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:14px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.num-list h3{font-size:17px;font-weight:600;margin-bottom:6px}
.num-list p{font-size:15px;color:var(--c-ink-2)}
.side-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh-1);
}
.side-card .side-icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:18px;margin-bottom:16px;
}
.side-card h3{font-size:17px;font-weight:600;margin-bottom:10px}
.side-card p{font-size:14.5px;color:var(--c-ink-2)}
.side-card .spec-list{margin-top:18px}
@media (max-width:991px){.notes-grid{grid-template-columns:1fr}}

/* ---------- 定义列表 ---------- */
.spec-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 40px;margin:0}
.spec-list > div{display:flex;justify-content:space-between;gap:18px;padding:14px 0;border-bottom:1px solid var(--c-line)}
.spec-list dt{margin:0;font-size:15px;color:var(--c-ink-2);font-weight:400}
.spec-list dd{margin:0;font-size:15px;font-weight:600;color:var(--c-ink);font-variant-numeric:tabular-nums;text-align:right}
@media (max-width:767px){.spec-list{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq-acc{max-width:900px;margin:0 auto}
.faq-acc .accordion-item{
  border:1px solid var(--c-line);border-radius:var(--r-md);background:#fff;
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-1);
}
.faq-acc .accordion-item:last-child{margin-bottom:0}
.faq-acc .accordion-header{margin:0}
.faq-acc .accordion-button{
  font-size:16px;font-weight:600;color:var(--c-ink);background:#fff;
  padding:18px 54px 18px 24px;box-shadow:none;border-left:2px solid transparent;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--c-primary);background:var(--c-primary-soft);border-left-color:var(--c-primary);
}
.faq-acc .accordion-button:focus{box-shadow:none;outline:none;border-color:var(--c-line)}
.faq-acc .accordion-button::after{
  content:"";width:12px;height:12px;background-image:none;
  border-right:2px solid var(--c-ink-3);border-bottom:2px solid var(--c-ink-3);
  transform:rotate(45deg);transition:transform .22s ease-out,border-color .18s ease-out;
  margin-left:auto;position:absolute;right:26px;top:50%;
}
.faq-acc .accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg);border-color:var(--c-primary);
}
.faq-acc .accordion-body{padding:4px 24px 22px;font-size:15px;line-height:1.85;color:var(--c-ink-2);background:#fff}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 26px;border-radius:10px;border:1px solid transparent;
  font-size:16px;font-weight:600;line-height:1;cursor:pointer;text-decoration:none;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background .18s ease-out,border-color .18s ease-out,color .18s ease-out;
}
.btn-cta{background:var(--c-cta);color:#fff;box-shadow:0 10px 22px rgba(255,122,47,.24)}
.btn-cta:hover{background:#FF8B4A;color:#fff;transform:translateY(-1px);box-shadow:0 14px 26px rgba(255,122,47,.28)}
.btn-cta:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.12)}
.btn-solid{background:var(--c-primary);color:#fff;box-shadow:0 10px 22px rgba(29,95,191,.2)}
.btn-solid:hover{background:#2267CB;color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--c-line);color:var(--c-ink)}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px);background:#fff}
.btn-sm-x{height:42px;padding:0 20px;font-size:15px}
@media (max-width:575px){
  .btn-x{height:46px;padding:0 20px;font-size:15px;width:100%}
  .hero-actions .link-arrow{width:100%;justify-content:flex-start}
}

/* ---------- 底部下载引导条 ---------- */
.cta-sec{padding:0 0 88px}
.cta-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:30px 34px;
}
.cta-bar h2{font-size:clamp(20px,2.2vw,26px);line-height:1.4;font-weight:600;margin-bottom:8px}
.cta-bar p{font-size:14.5px;color:var(--c-ink-2);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
@media (max-width:991px){.cta-sec{padding:0 0 64px}}
@media (max-width:575px){
  .cta-sec{padding:0 0 52px}
  .cta-bar{padding:24px 20px}
  .cta-actions{width:100%}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-bg);border-top:1px solid var(--c-line);padding:64px 0 0}
.ft-grid{display:grid;grid-template-columns:minmax(0,4fr) repeat(3,minmax(0,2.4fr));gap:40px}
.ft-brand .brand{margin-bottom:14px;display:inline-flex}
.ft-brand p{font-size:14px;color:var(--c-ink-2);max-width:340px}
.ft-col h4{font-size:15px;font-weight:600;margin-bottom:16px}
.ft-col ul{list-style:none}
.ft-col li{margin-bottom:10px}
.ft-col a,.ft-col span{font-size:14px;color:var(--c-ink-2)}
.ft-col a{position:relative;display:inline-block;transition:color .18s ease-out,transform .18s ease-out}
.ft-col a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--c-primary);transition:width .2s ease-out;
}
.ft-col a:hover{color:var(--c-primary);transform:translateX(2px)}
.ft-col a:hover::after{width:100%}
.ft-bottom{
  margin-top:48px;padding:20px 0;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:var(--c-ink-3);
}
@media (max-width:991px){
  .ft-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:575px){
  .site-footer{padding:48px 0 0}
  .ft-grid{grid-template-columns:1fr;gap:28px}
  .ft-bottom{margin-top:32px}
}

/* roulang page: category2 */
:root{
  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-ink:#0F1B2D;
  --c-ink-2:#4A5A70;
  --c-ink-3:#8494A8;
  --c-primary:#1D5FBF;
  --c-primary-deep:#123E7C;
  --c-primary-soft:#E8F0FB;
  --c-accent:#16B8A6;
  --c-cta:#FF7A2F;
  --c-line:#E3EAF3;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --sh-1:0 1px 2px rgba(15,27,45,.04);
  --sh-2:0 8px 24px rgba(15,27,45,.06);
  --sh-3:0 16px 40px rgba(29,95,191,.12);
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --bs-body-color:#0F1B2D;
  --bs-body-bg:#F7F9FC;
  --bs-border-color:#E3EAF3;
  --bs-border-radius:12px;
  --bs-border-radius-lg:16px;
  --bs-border-radius-sm:8px;
  --bs-primary:#1D5FBF;
  --bs-primary-rgb:29,95,191;
  --bs-link-color:#1D5FBF;
  --bs-link-hover-color:#123E7C;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.85;
  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 .18s ease}
a:hover{color:var(--c-primary-deep)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,dl,dd,dt{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1400px){.container-x{max-width:1320px}}

/* ---------- 通用模块节奏 ---------- */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-alt{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.sec-head{margin-bottom:32px}
.sec-mark{display:inline-block;width:24px;height:3px;border-radius:2px;background:var(--c-primary);margin-bottom:14px}
.sec-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.35;font-weight:600;color:var(--c-ink)}
.sec-head p{margin-top:12px;font-size:16px;color:var(--c-ink-2);max-width:760px}
@media (max-width:991px){.section{padding:64px 0}.section-tight{padding:52px 0}}
@media (max-width:575px){.section{padding:52px 0}.section-tight{padding:44px 0}.container-x{padding:0 18px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.hd-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.brand{
  font-size:19px;font-weight:700;color:var(--c-ink);
  text-decoration:none;white-space:nowrap;line-height:1.3;
}
.brand span{color:var(--c-primary)}
.brand:hover{color:var(--c-ink)}
.nav-toggle{
  display:none;align-items:center;gap:8px;
  background:transparent;border:1px solid var(--c-line);
  border-radius:10px;padding:8px 14px;font-size:14px;color:var(--c-ink-2);
}
.nav-toggle:hover{border-color:rgba(29,95,191,.28);color:var(--c-primary)}
.nav-list{display:flex;align-items:center;gap:32px}
.nav-list a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--c-ink-2);text-decoration:none;
}
.nav-list a:hover{color:var(--c-primary)}
.nav-list a.is-active{color:var(--c-ink);font-weight:600}
.nav-list a.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--c-primary);border-radius:2px;
}
@media (min-width:992px){
  .nav-toggle{display:none !important}
  #mainNav.collapse{display:block !important;height:auto !important;visibility:visible !important}
}
@media (max-width:991px){
  .nav-toggle{display:inline-flex}
  .hd-inner{flex-wrap:wrap;padding:12px 0;row-gap:8px}
  #mainNav{flex-basis:100%;order:3;border-top:1px solid var(--c-line);margin-top:8px;padding-top:8px}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-list li{border-bottom:1px solid var(--c-line)}
  .nav-list li:last-child{border-bottom:0}
  .nav-list a{display:block;padding:13px 2px;font-size:15px;color:var(--c-ink-2)}
  .nav-list a.is-active{color:var(--c-primary)}
  .nav-list a.is-active::after{display:none}
}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-3);margin-bottom:22px}
.crumb a{color:var(--c-ink-2)}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{color:var(--c-ink-3)}
.crumb .cur{color:var(--c-ink-3);max-width:60vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 内页 Hero ---------- */
.page-hero{position:relative;overflow:hidden;padding:44px 0 60px;background:var(--c-bg)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(247,249,252,.94) 0%,rgba(247,249,252,.86) 55%,rgba(232,240,251,.82) 100%);
}
.page-hero .container-x{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary-deep);
  font-size:13px;font-weight:600;margin-bottom:18px;
}
.hero-tag i{font-size:12px}
.hero-grid h1{
  font-size:clamp(30px,4.2vw,46px);line-height:1.25;font-weight:700;color:var(--c-ink);
}
.hero-sub{margin-top:18px;font-size:17px;color:var(--c-ink-2);max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:30px}
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:10px;
  font-size:15.5px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
}
.btn-x-primary{background:var(--c-cta);color:#fff;box-shadow:0 8px 20px rgba(255,122,47,.24)}
.btn-x-primary:hover{background:#ff8b48;color:#fff;transform:translateY(-1px)}
.btn-x-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(15,27,45,.16)}
.btn-x-ghost{background:transparent;border-color:var(--c-line);color:var(--c-primary-deep)}
.btn-x-ghost:hover{border-color:rgba(29,95,191,.4);background:#fff;transform:translateY(-1px)}
.btn-x-ghost:active{transform:translateY(0)}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--c-primary-deep);
}
.link-arrow i{transition:transform .18s ease}
.link-arrow:hover{color:var(--c-primary)}
.link-arrow:hover i{transform:translateX(4px)}
.hero-visual img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-lg);
  border:1px solid rgba(255,255,255,.9);
  box-shadow:var(--sh-2);
}
.hero-meta{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:38px;padding-top:22px;border-top:1px solid var(--c-line);
}
.hero-meta li{padding:0 18px;border-left:1px solid var(--c-line)}
.hero-meta li:first-child{padding-left:0;border-left:0}
.hero-meta .k{display:block;font-size:13px;color:var(--c-ink-3)}
.hero-meta .v{display:block;font-size:15px;font-weight:600;color:var(--c-ink);font-variant-numeric:tabular-nums;margin-top:4px}
@media (max-width:991px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .page-hero{padding:36px 0 46px}
  .hero-meta{grid-template-columns:repeat(2,1fr);row-gap:18px}
  .hero-meta li{padding:0 14px}
  .hero-meta li:nth-child(odd){padding-left:0;border-left:0}
}
@media (max-width:575px){
  .hero-meta{grid-template-columns:1fr;row-gap:0}
  .hero-meta li{padding:12px 0;border-left:0;border-bottom:1px solid var(--c-line)}
  .hero-meta li:last-child{border-bottom:0}
  .hero-cta .btn-x{width:100%}
  .crumb .cur{max-width:46vw}
}

/* ---------- 筛选标签 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  height:38px;padding:0 18px;border-radius:999px;
  border:1px solid var(--c-line);background:var(--c-surface);
  font-size:14px;color:var(--c-ink-2);cursor:pointer;
  transition:all .18s ease;
}
.chip:hover{border-color:rgba(29,95,191,.32);color:var(--c-primary);transform:translateY(-1px)}
.chip.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600;box-shadow:0 6px 16px rgba(29,95,191,.2)}

/* ---------- 卡片网格 2×3 ---------- */
.grid-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.dl-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;
  transition:box-shadow .18s ease,border-color .18s ease,transform .18s ease;
}
.dl-card:hover{box-shadow:var(--sh-2);border-color:rgba(29,95,191,.28);transform:translateY(-2px)}
.dl-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--c-primary-soft)}
.dl-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.dl-card:hover .dl-cover img{transform:scale(1.03)}
.dl-badge{
  position:absolute;top:14px;left:14px;z-index:2;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  background:rgba(255,255,255,.94);color:var(--c-primary-deep);
  font-size:12.5px;font-weight:600;box-shadow:var(--sh-1);
}
.dl-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1}
.dl-body h3{font-size:19px;line-height:1.5;font-weight:600;color:var(--c-ink)}
.dl-body p{margin-top:10px;font-size:15px;color:var(--c-ink-2);line-height:1.8}
.dl-foot{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  margin-top:22px;padding-top:16px;border-top:1px solid var(--c-line);
}
.dl-foot .meta{font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums}
.dl-foot a{font-size:14.5px;font-weight:600;display:inline-flex;align-items:center;gap:6px;color:var(--c-primary-deep)}
.dl-foot a i{transition:transform .18s ease}
.dl-foot a:hover{color:var(--c-primary)}
.dl-foot a:hover i{transform:translateX(4px)}
@media (max-width:767px){.grid-cards{grid-template-columns:1fr;gap:20px}.dl-body{padding:20px 20px 22px}}

/* ---------- Bento 价值区 ---------- */
.bento{display:grid;grid-template-columns:1.18fr .82fr;gap:24px}
.bento-main,.bento-side{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);padding:30px;
  transition:box-shadow .18s ease,border-color .18s ease,transform .18s ease;
}
.bento-main:hover,.bento-side:hover{box-shadow:var(--sh-2);border-color:rgba(29,95,191,.28);transform:translateY(-2px)}
.bento-main{grid-row:span 2;display:flex;flex-direction:column;justify-content:space-between}
.bento-right{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.bento-ico{
  width:44px;height:44px;border-radius:var(--r-sm);
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:18px;margin-bottom:18px;
}
.bento-main h3{font-size:22px;font-weight:600;color:var(--c-ink)}
.bento-side h3{font-size:18px;font-weight:600;color:var(--c-ink)}
.bento-main p,.bento-side p{margin-top:10px;font-size:15px;color:var(--c-ink-2)}
.bento-list{margin-top:24px;display:grid;gap:12px}
.bento-list li{display:flex;gap:12px;font-size:15px;color:var(--c-ink-2)}
.bento-list i{color:var(--c-accent);margin-top:6px;font-size:13px}
.bento-figure{margin-top:26px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--c-line)}
.bento-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
@media (max-width:991px){
  .bento{grid-template-columns:1fr}
  .bento-main{grid-row:auto}
}

/* ---------- 适用场景 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px;margin-top:8px}
.scene-item{display:flex;gap:18px;padding:26px 0;border-bottom:1px solid var(--c-line)}
.scene-item .num{
  flex:none;width:34px;height:34px;border-radius:50%;
  border:1px solid var(--c-line);background:var(--c-surface);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13.5px;font-weight:600;color:var(--c-primary);font-variant-numeric:tabular-nums;
}
.scene-item h3{font-size:17.5px;font-weight:600;color:var(--c-ink)}
.scene-item p{margin-top:8px;font-size:15px;color:var(--c-ink-2)}
@media (max-width:767px){.scene-grid{grid-template-columns:1fr;gap:0}}

/* ---------- 下载流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{
  position:relative;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);padding:26px 24px;
  transition:box-shadow .18s ease,border-color .18s ease,transform .18s ease;
}
.step:hover{box-shadow:var(--sh-2);border-color:rgba(29,95,191,.28);transform:translateY(-2px)}
.step .idx{
  display:inline-block;font-size:13px;font-weight:700;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:999px;padding:4px 12px;
  font-variant-numeric:tabular-nums;
}
.step h3{margin-top:16px;font-size:17px;font-weight:600;color:var(--c-ink)}
.step p{margin-top:8px;font-size:14.5px;color:var(--c-ink-2)}
@media (max-width:991px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:575px){.steps{grid-template-columns:1fr}}

/* ---------- 系统要求 dl ---------- */
.req-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px}
.req-item{display:flex;justify-content:space-between;gap:20px;padding:16px 0;border-bottom:1px solid var(--c-line);font-size:15px}
.req-item dt{color:var(--c-ink-3);font-weight:400}
.req-item dd{color:var(--c-ink);font-weight:600;text-align:right;font-variant-numeric:tabular-nums}
@media (max-width:767px){.req-list{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq .accordion-item{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md) !important;box-shadow:var(--sh-1);margin-bottom:12px;overflow:hidden;
}
.faq .accordion-item:last-child{margin-bottom:0}
.faq .accordion-button{
  position:relative;background:var(--c-surface);
  font-size:16px;font-weight:600;color:var(--c-ink);
  padding:20px 56px 20px 24px;box-shadow:none;
}
.faq .accordion-button:not(.collapsed){color:var(--c-primary-deep);background:var(--c-surface);box-shadow:none}
.faq .accordion-button:not(.collapsed)::after{
  content:"\f068";font-family:"Font Awesome 6 Free";font-weight:900;
  background-image:none;transform:none;
  position:absolute;right:24px;top:50%;margin-top:-9px;
  font-size:14px;color:var(--c-primary);
}
.faq .accordion-button::after{
  content:"\2b";font-family:"Font Awesome 6 Free";font-weight:900;
  background-image:none;transform:none;
  position:absolute;right:24px;top:50%;margin-top:-9px;
  font-size:15px;color:var(--c-ink-3);
}
.faq .accordion-button:focus{box-shadow:none;border-color:transparent}
.faq .accordion-button:focus-visible{outline:2px solid var(--c-primary);outline-offset:-2px}
.faq .accordion-body{
  padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--c-ink-2);
  border-left:2px solid transparent;
}
.faq .accordion-collapse.show .accordion-body,
.faq .accordion-collapse.collapsing .accordion-body{border-left-color:var(--c-primary);margin-left:24px;padding-left:20px}
.faq .accordion-button h3{font-size:16px;font-weight:600;margin:0;display:inline}

/* ---------- CTA 引导条 ---------- */
.cta-bar{
  border:1px solid var(--c-line);border-radius:var(--r-lg);
  background:var(--c-surface);
  box-shadow:var(--sh-1);
  padding:34px 36px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
}
.cta-bar .cta-txt{max-width:640px}
.cta-bar h2{font-size:clamp(20px,2.2vw,26px);font-weight:600;color:var(--c-ink)}
.cta-bar p{margin-top:10px;font-size:15px;color:var(--c-ink-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
@media (max-width:575px){.cta-bar{padding:26px 20px}.cta-actions{width:100%}.cta-actions .btn-x{width:100%}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-bg);border-top:1px solid var(--c-line);padding:56px 0 0;margin-top:8px}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.ft-brand .brand{font-size:19px}
.ft-brand p{margin-top:16px;font-size:14px;color:var(--c-ink-2);max-width:340px}
.ft-col h4{font-size:14px;font-weight:600;color:var(--c-ink);margin-bottom:16px}
.ft-col ul{display:grid;gap:10px}
.ft-col li a,.ft-col li span{font-size:14px;color:var(--c-ink-2)}
.ft-col li a{position:relative;display:inline-block;transition:color .18s ease,transform .18s ease}
.ft-col li a:hover{color:var(--c-primary);transform:translateX(2px)}
.ft-bottom{
  margin-top:44px;padding:20px 0;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--c-ink-3);
}
@media (max-width:991px){.ft-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:575px){.ft-grid{grid-template-columns:1fr}.site-footer{padding-top:44px}.ft-bottom{flex-direction:column;gap:8px}}

/* roulang page: category3 */
:root{
  --c-bg:#F7F9FC;--c-surface:#FFFFFF;--c-ink:#0F1B2D;--c-ink-2:#4A5A70;--c-ink-3:#8494A8;
  --c-primary:#1D5FBF;--c-primary-deep:#123E7C;--c-primary-soft:#E8F0FB;
  --c-accent:#16B8A6;--c-cta:#FF7A2F;--c-line:#E3EAF3;--c-danger:#D9483B;
  --r-sm:8px;--r-md:12px;--r-lg:16px;
  --sh-1:0 1px 2px rgba(15,27,45,.04);--sh-2:0 8px 24px rgba(15,27,45,.06);--sh-3:0 16px 40px rgba(29,95,191,.12);
  --sect:88px;
  --bs-primary:#1D5FBF;--bs-body-color:#0F1B2D;--bs-border-radius:12px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--c-bg);color:var(--c-ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--c-primary-deep)}
h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1400px){.container-x{max-width:1320px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid transparent;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-stuck{border-bottom-color:var(--c-line);box-shadow:var(--sh-1)}
.hd-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.brand{display:inline-flex;align-items:baseline;gap:2px;font-size:19px;font-weight:700;color:var(--c-ink);letter-spacing:0}
.brand span{font-weight:500;font-size:16px;color:var(--c-ink-2)}
.brand:hover{color:var(--c-primary-deep)}
.nav-panel{display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:32px}
.nav-list a{
  position:relative;display:inline-block;padding:6px 0;font-size:15px;color:var(--c-ink-2);
}
.nav-list a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:var(--c-primary);transition:right .22s ease;border-radius:2px;
}
.nav-list a:hover{color:var(--c-ink)}
.nav-list a:hover::after{right:0}
.nav-list a.is-active{color:var(--c-ink);font-weight:600}
.nav-list a.is-active::after{right:0}
.nav-toggle{
  display:none;align-items:center;gap:8px;background:var(--c-surface);border:1px solid var(--c-line);
  color:var(--c-ink-2);font-size:14px;padding:8px 14px;border-radius:10px;
}
.nav-toggle i{font-size:14px}
@media (max-width:991px){
  .nav-toggle{display:inline-flex}
  .nav-panel{position:absolute;left:0;right:0;top:100%;background:var(--c-surface);border-bottom:1px solid var(--c-line);box-shadow:var(--sh-2)}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding:8px 20px 18px}
  .nav-list li{border-bottom:1px solid var(--c-line)}
  .nav-list li:last-child{border-bottom:0}
  .nav-list a{display:block;padding:13px 0;font-size:15px}
  .nav-list a::after{display:none}
  .nav-list a.is-active{color:var(--c-primary)}
}

/* ---------- breadcrumb ---------- */
.crumb-wrap{padding:22px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-3)}
.crumb a{color:var(--c-ink-2)}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{color:var(--c-ink-3)}
.crumb .cur{color:var(--c-ink-3);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- hero ---------- */
.page-hero{
  position:relative;margin:18px 0 0;padding:56px 0 60px;
  background-image:linear-gradient(rgba(247,249,252,.86),rgba(247,249,252,.96)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;border-bottom:1px solid var(--c-line);
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.tag-pill{
  display:inline-flex;align-items:center;gap:8px;background:var(--c-primary-soft);color:var(--c-primary-deep);
  font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;
}
.tag-pill i{font-size:12px}
.page-hero h1{
  font-size:clamp(28px,3.6vw,42px);line-height:1.28;font-weight:700;margin:20px 0 16px;color:var(--c-ink);
}
.hero-sub{font-size:16px;color:var(--c-ink-2);max-width:620px}
.hero-cta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:28px}
.btn-cta,.btn-brand,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;
  border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,filter .18s ease;
}
.btn-cta{background:var(--c-cta);color:#fff;box-shadow:0 8px 20px rgba(255,122,47,.24)}
.btn-cta:hover{color:#fff;filter:brightness(1.04);transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,122,47,.3)}
.btn-cta:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.14)}
.btn-brand{background:var(--c-primary);color:#fff}
.btn-brand:hover{color:#fff;filter:brightness(1.04);transform:translateY(-1px);box-shadow:var(--sh-3)}
.btn-brand:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.14)}
.btn-ghost{background:transparent;border-color:var(--c-line);color:var(--c-ink-2)}
.btn-ghost:hover{border-color:rgba(29,95,191,.32);color:var(--c-primary);transform:translateY(-1px)}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--c-primary)}
.text-link i{transition:transform .18s ease}
.text-link:hover i{transform:translateX(4px)}

.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:7/5;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid rgba(255,255,255,.8);box-shadow:var(--sh-2);
}
.hero-visual .badge-float{
  position:absolute;left:-14px;bottom:22px;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-2);padding:12px 18px;font-size:13px;color:var(--c-ink-2);
}
.hero-visual .badge-float strong{display:block;font-size:18px;color:var(--c-ink);font-variant-numeric:tabular-nums}

/* ---------- trust bar ---------- */
.trust-bar{
  display:grid;grid-template-columns:repeat(4,1fr);background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);
  margin-top:-26px;position:relative;z-index:2;overflow:hidden;
}
.trust-bar div{padding:18px 22px;border-right:1px solid var(--c-line)}
.trust-bar div:last-child{border-right:0}
.trust-bar span{display:block;font-size:13px;color:var(--c-ink-3)}
.trust-bar strong{display:block;font-size:15px;font-weight:600;color:var(--c-ink);margin-top:4px;font-variant-numeric:tabular-nums}

/* ---------- section base ---------- */
.section{padding:var(--sect) 0}
.section-sm{padding:56px 0}
.sec-head{margin-bottom:32px}
.sec-mark{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-primary)}
.sec-mark::before{content:"";width:18px;height:2px;background:var(--c-primary);border-radius:2px}
.sec-head h2{font-size:clamp(23px,2.5vw,31px);line-height:1.35;font-weight:600;margin-top:12px}
.sec-head p{color:var(--c-ink-2);margin-top:10px;max-width:760px}

/* ---------- anchor layout ---------- */
.anchor-layout{display:grid;grid-template-columns:3fr 9fr;gap:44px;align-items:start}
.anchor-nav{
  position:sticky;top:96px;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);padding:10px 0;
}
.anchor-nav .an-title{font-size:13px;color:var(--c-ink-3);padding:12px 22px 8px;font-weight:600}
.anchor-nav a{
  display:block;padding:12px 22px;font-size:14px;color:var(--c-ink-2);border-left:2px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.anchor-nav a span{color:var(--c-ink-3);font-variant-numeric:tabular-nums;margin-right:8px;font-size:13px}
.anchor-nav a:hover{background:var(--c-primary-soft);color:var(--c-primary-deep)}
.anchor-nav a.is-active{border-left-color:var(--c-primary);color:var(--c-primary-deep);font-weight:600;background:var(--c-primary-soft)}
.anchor-nav a.is-active span{color:var(--c-primary)}

.doc-section{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:30px 32px;margin-bottom:24px;scroll-margin-top:100px;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.doc-section:hover{box-shadow:var(--sh-2);border-color:rgba(29,95,191,.2)}
.doc-section h2{
  font-size:22px;line-height:1.5;font-weight:600;display:flex;align-items:baseline;gap:12px;
  padding-bottom:16px;border-bottom:1px solid var(--c-line);margin-bottom:20px;
}
.doc-section h2 .sec-num{
  font-size:14px;font-weight:700;color:var(--c-primary);background:var(--c-primary-soft);
  padding:3px 10px;border-radius:6px;font-variant-numeric:tabular-nums;
}
.doc-section h3{font-size:17px;font-weight:600;margin:22px 0 10px}
.doc-section p{color:var(--c-ink-2);margin-bottom:14px}
.doc-section p:last-child{margin-bottom:0}

.def-list dl{margin:0}
.def-list .row-item{
  display:grid;grid-template-columns:170px 1fr;gap:20px;padding:14px 0;border-bottom:1px solid var(--c-line);
}
.def-list .row-item:last-child{border-bottom:0}
.def-list dt{font-size:15px;font-weight:600;color:var(--c-ink)}
.def-list dd{font-size:15px;color:var(--c-ink-2)}
.check-list li{
  position:relative;padding:10px 0 10px 28px;font-size:15px;color:var(--c-ink-2);border-bottom:1px solid var(--c-line);
}
.check-list li:last-child{border-bottom:0}
.check-list li::before{
  content:"";position:absolute;left:4px;top:20px;width:8px;height:8px;border-radius:50%;
  background:var(--c-primary);
}
.check-list li strong{color:var(--c-ink);font-weight:600}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:12px 32px}

.step-list{counter-reset:st;margin-top:6px}
.step-list li{
  position:relative;padding:0 0 20px 46px;border-left:1px solid var(--c-line);margin-left:14px;
}
.step-list li:last-child{border-left-color:transparent;padding-bottom:0}
.step-list li::before{
  counter-increment:st;content:counter(st,decimal-leading-zero);
  position:absolute;left:-15px;top:0;width:30px;height:30px;border-radius:50%;
  background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-primary);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.step-list li strong{display:block;font-size:15px;font-weight:600;color:var(--c-ink);margin-bottom:4px}
.step-list li span{font-size:14px;color:var(--c-ink-2)}

.note-strip{
  display:flex;gap:14px;align-items:flex-start;background:var(--c-primary-soft);
  border-left:3px solid var(--c-primary);border-radius:10px;padding:16px 18px;margin-top:20px;
}
.note-strip i{color:var(--c-primary);margin-top:4px}
.note-strip p{font-size:14px;color:var(--c-ink-2);margin:0}

/* ---------- figure ---------- */
.figure-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
.figure-grid img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-md);
  border:1px solid var(--c-line);box-shadow:var(--sh-1);
}

/* ---------- FAQ ---------- */
.faq-acc .accordion-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-1);
}
.faq-acc .accordion-button{
  background:var(--c-surface);color:var(--c-ink);font-size:16px;font-weight:600;
  padding:18px 22px;box-shadow:none;border-radius:var(--r-md);
}
.faq-acc .accordion-button:not(.collapsed){color:var(--c-primary-deep);background:var(--c-surface)}
.faq-acc .accordion-button:focus{box-shadow:0 0 0 3px rgba(29,95,191,.14)}
.faq-acc .accordion-button::after{
  content:"+";background-image:none;font-size:22px;line-height:1;color:var(--c-primary);
  width:auto;height:auto;display:flex;align-items:center;justify-content:center;
  transition:transform .22s ease;flex-shrink:0;margin-left:16px;
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(45deg)}
.faq-acc .accordion-body{padding:0 22px 20px;font-size:15px;color:var(--c-ink-2);border-left:2px solid var(--c-primary);margin-left:22px;padding-left:20px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;border-radius:var(--r-lg);overflow:hidden;padding:46px 44px;
  background-image:linear-gradient(rgba(18,62,124,.88),rgba(29,95,191,.86)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;box-shadow:var(--sh-3);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,30px);line-height:1.35;font-weight:600}
.cta-band p{color:rgba(255,255,255,.82);margin-top:12px;max-width:620px}
.cta-band .hero-cta{margin-top:26px}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.45)}
.cta-band .btn-ghost:hover{color:#fff;border-color:#fff;background:rgba(255,255,255,.1)}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--c-line);background:var(--c-bg);padding:56px 0 26px;margin-top:var(--sect)}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.ft-brand .brand{margin-bottom:14px}
.ft-brand p{font-size:14px;color:var(--c-ink-3);max-width:320px}
.ft-col h4{font-size:14px;font-weight:600;color:var(--c-ink);margin-bottom:14px}
.ft-col ul li{margin-bottom:10px;font-size:14px;color:var(--c-ink-3)}
.ft-col a{color:var(--c-ink-2);position:relative;display:inline-block}
.ft-col a::after{content:"";position:absolute;left:0;right:100%;bottom:-2px;height:1px;background:var(--c-primary);transition:right .2s ease}
.ft-col a:hover{color:var(--c-primary)}
.ft-col a:hover::after{right:0}
.ft-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  border-top:1px solid var(--c-line);margin-top:40px;padding-top:20px;font-size:13px;color:var(--c-ink-3);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  :root{--sect:72px}
  .anchor-layout{gap:32px}
  .doc-section{padding:26px 24px}
}
@media (max-width:991px){
  :root{--sect:64px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-visual{order:-1}
  .hero-visual .badge-float{left:auto;right:16px;bottom:16px}
  .anchor-layout{grid-template-columns:1fr}
  .anchor-nav{position:static;top:auto;display:flex;overflow-x:auto;padding:6px;gap:4px}
  .anchor-nav .an-title{display:none}
  .anchor-nav a{white-space:nowrap;border-left:0;border-bottom:2px solid transparent;border-radius:8px;padding:10px 14px}
  .anchor-nav a.is-active{border-left:0;border-bottom-color:var(--c-primary)}
  .figure-grid{grid-template-columns:1fr}
  .ft-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .trust-bar{grid-template-columns:1fr 1fr;margin-top:-18px}
  .trust-bar div{border-right:0;border-bottom:1px solid var(--c-line)}
  .trust-bar div:nth-child(odd){border-right:1px solid var(--c-line)}
  .trust-bar div:nth-child(3),.trust-bar div:nth-child(4){border-bottom:0}
  .def-list .row-item{grid-template-columns:1fr;gap:4px}
  .two-col{grid-template-columns:1fr}
  .cta-band{padding:32px 24px}
}
@media (max-width:575px){
  :root{--sect:52px}
  body{font-size:15px}
  .container-x{padding:0 20px}
  .page-hero{padding:38px 0 44px}
  .doc-section{padding:22px 18px}
  .doc-section h2{font-size:19px;flex-direction:column;gap:8px}
  .faq-acc .accordion-body{margin-left:0;border-left:0;padding-left:22px;border-top:1px solid var(--c-line);padding-top:14px}
  .ft-grid{grid-template-columns:1fr}
  .hero-cta .btn-cta,.hero-cta .btn-brand{width:100%}
}

/* roulang page: category4 */
:root{
  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-ink:#0F1B2D;
  --c-ink-2:#4A5A70;
  --c-ink-3:#8494A8;
  --c-primary:#1D5FBF;
  --c-primary-deep:#123E7C;
  --c-primary-soft:#E8F0FB;
  --c-accent:#16B8A6;
  --c-cta:#FF7A2F;
  --c-line:#E3EAF3;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --sh-1:0 1px 2px rgba(15,27,45,.04);
  --sh-2:0 8px 24px rgba(15,27,45,.06);
  --sh-3:0 16px 40px rgba(29,95,191,.12);
  --bs-primary:#1D5FBF;
  --bs-body-color:#0F1B2D;
  --bs-border-radius:12px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-ink);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease-out;}
a:hover{color:var(--c-primary);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:0;}
p{margin:0;}
button,input{font-family:inherit;}
button{border:0;background:none;cursor:pointer;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}

.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.site-header.is-scrolled{
  border-bottom-color:var(--c-line);
  box-shadow:var(--sh-1);
}
.hd-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:72px;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:baseline;
  font-size:19px;
  font-weight:700;
  color:var(--c-ink);
  letter-spacing:0;
  white-space:nowrap;
}
.brand span{
  margin-left:4px;
  color:var(--c-primary);
  font-weight:600;
  font-size:17px;
}
.brand:hover{color:var(--c-ink);}
.nav-panel{flex:1;}
.nav-list{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:32px;
}
.nav-list > li > a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  color:var(--c-ink-2);
}
.nav-list > li > a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease-out;
}
.nav-list > li > a:hover{color:var(--c-primary);}
.nav-list > li > a:hover::after{transform:scaleX(1);}
.nav-list > li > a.is-active{
  color:var(--c-ink);
  font-weight:600;
}
.nav-list > li > a.is-active::after{transform:scaleX(1);}
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  font-size:15px;
  color:var(--c-ink-2);
  padding:8px 12px;
  border:1px solid var(--c-line);
  border-radius:10px;
  background:#fff;
}

/* ============ 面包屑 ============ */
.crumb-bar{
  padding:20px 0 0;
  font-size:13px;
  color:var(--c-ink-3);
}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.crumb li{display:inline-flex;align-items:center;gap:8px;}
.crumb li::after{content:"/";color:var(--c-ink-3);}
.crumb li:last-child::after{display:none;}
.crumb a{color:var(--c-ink-3);}
.crumb a:hover{color:var(--c-primary);}
.crumb .is-now{color:var(--c-ink-2);font-weight:600;}

/* ============ Hero ============ */
.cat-hero{
  position:relative;
  padding:56px 0 64px;
  background-image:linear-gradient(180deg,rgba(247,249,252,.93),rgba(247,249,252,.86)),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--c-line);
}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--c-primary);
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:999px;
  padding:6px 14px;
  box-shadow:var(--sh-1);
}
.hero-eyebrow i{color:var(--c-accent);font-size:12px;}
.cat-hero h1{
  margin:20px 0 0;
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.25;
  font-weight:700;
  color:var(--c-ink);
}
.hero-sub{
  margin-top:16px;
  font-size:17px;
  line-height:1.85;
  color:var(--c-ink-2);
  max-width:620px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
  margin-top:28px;
}
.btn-x{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:10px;
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out;
  white-space:nowrap;
}
.btn-cta{
  background:var(--c-cta);
  color:#fff;
  box-shadow:0 8px 20px rgba(255,122,47,.26);
}
.btn-cta:hover{background:#ff8a46;color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,122,47,.3);}
.btn-cta:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.14);}
.btn-blue{
  background:var(--c-primary);
  color:#fff;
  box-shadow:0 8px 20px rgba(29,95,191,.22);
}
.btn-blue:hover{background:#2569cc;color:#fff;transform:translateY(-1px);}
.btn-blue:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.14);}
.btn-ghost{
  background:#fff;
  border-color:var(--c-line);
  color:var(--c-ink);
}
.btn-ghost:hover{border-color:rgba(29,95,191,.4);color:var(--c-primary);transform:translateY(-1px);}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--c-primary);
}
.link-more i{transition:transform .18s ease-out;font-size:12px;}
.link-more:hover i{transform:translateX(4px);}

.hero-visual{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--c-line);
  box-shadow:var(--sh-3);
  background:#fff;
}
.hero-visual img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
}
.hero-visual .hv-tag{
  position:absolute;
  left:16px;
  bottom:16px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.94);
  border:1px solid var(--c-line);
  font-size:13px;
  font-weight:600;
  color:var(--c-ink-2);
  box-shadow:var(--sh-1);
}
.hero-visual .hv-tag i{color:var(--c-accent);}

.hero-strip{
  margin-top:44px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--c-line);
}
.hero-strip > div{
  padding:18px 20px 0;
  border-left:1px solid var(--c-line);
}
.hero-strip > div:first-child{border-left:0;padding-left:0;}
.hero-strip .hs-k{
  font-size:13px;
  color:var(--c-ink-3);
}
.hero-strip .hs-v{
  margin-top:4px;
  font-size:18px;
  font-weight:600;
  color:var(--c-ink);
}

/* ============ 通用区块 ============ */
.sec{padding:88px 0;}
.sec-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.sec-head{
  max-width:760px;
  margin-bottom:32px;
}
.sec-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--c-primary);
}
.sec-eyebrow::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--c-primary);
}
.sec-head h2{
  margin-top:12px;
  font-size:clamp(24px,2.6vw,32px);
  line-height:1.35;
  font-weight:600;
  color:var(--c-ink);
}
.sec-head p{
  margin-top:12px;
  font-size:16px;
  color:var(--c-ink-2);
}

/* ============ 时间线 ============ */
.timeline{
  position:relative;
  padding:8px 0;
}
.timeline::before{
  content:"";
  position:absolute;
  top:0;
  bottom:0;
  left:50%;
  width:1px;
  background:var(--c-line);
  transform:translateX(-.5px);
}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:1fr 88px 1fr;
  align-items:start;
  margin-bottom:28px;
}
.tl-item:last-child{margin-bottom:0;}
.tl-mid{
  grid-column:2;
  display:flex;
  justify-content:center;
  padding-top:30px;
}
.tl-dot{
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--c-primary);
  box-shadow:0 0 0 4px #fff,0 0 0 5px var(--c-line);
}
.tl-card{
  grid-column:1;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:24px 26px;
  transition:box-shadow .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.tl-card:hover{
  box-shadow:var(--sh-2);
  border-color:rgba(29,95,191,.28);
  transform:translateY(-2px);
}
.tl-item:nth-child(even) .tl-card{
  grid-column:3;
  grid-row:1;
}
.tl-item:nth-child(even) .tl-mid{grid-row:1;}
.tl-meta{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--c-ink-3);
}
.tl-step{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:32px;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  background:var(--c-primary-soft);
  color:var(--c-primary);
  font-size:13px;
  font-weight:600;
}
.tl-card h3{
  margin-top:12px;
  font-size:19px;
  line-height:1.5;
  color:var(--c-ink);
}
.tl-card p{
  margin-top:10px;
  font-size:15px;
  line-height:1.8;
  color:var(--c-ink-2);
}
.tl-note{
  margin-top:14px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-accent);
  font-weight:600;
}

/* ============ 场景卡片 ============ */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.scene-card{
  display:grid;
  grid-template-columns:200px 1fr;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.scene-card:hover{
  box-shadow:var(--sh-2);
  border-color:rgba(29,95,191,.28);
  transform:translateY(-2px);
}
.scene-cover{
  position:relative;
  overflow:hidden;
  background:var(--c-primary-soft);
}
.scene-cover img{
  width:100%;
  height:100%;
  min-height:172px;
  object-fit:cover;
}
.scene-body{
  padding:22px 24px;
}
.badge-soft{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:999px;
  background:var(--c-primary-soft);
  color:var(--c-primary);
  font-size:12px;
  font-weight:600;
}
.badge-soft.is-accent{
  background:rgba(22,184,166,.12);
  color:#0E8C7E;
}
.scene-body h3{
  margin-top:12px;
  font-size:18px;
  line-height:1.5;
  color:var(--c-ink);
}
.scene-body p{
  margin-top:8px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--c-ink-2);
}

/* ============ 双栏说明 ============ */
.two-col{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
}
.panel{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:28px 30px;
}
.panel h3{
  font-size:20px;
  color:var(--c-ink);
  display:flex;
  align-items:center;
  gap:10px;
}
.panel h3 i{
  color:var(--c-primary);
  font-size:18px;
}
.panel > p{
  margin-top:10px;
  font-size:15px;
  color:var(--c-ink-2);
}
.def-list{
  margin-top:20px;
  border-top:1px solid var(--c-line);
}
.def-list div{
  display:grid;
  grid-template-columns:132px 1fr;
  gap:16px;
  padding:14px 0;
  border-bottom:1px solid var(--c-line);
}
.def-list dt{
  font-size:14px;
  font-weight:600;
  color:var(--c-ink);
}
.def-list dd{
  margin:0;
  font-size:14.5px;
  color:var(--c-ink-2);
  line-height:1.75;
}
.tick-list{
  margin-top:20px;
  display:grid;
  gap:12px;
}
.tick-list li{
  display:flex;
  gap:12px;
  font-size:15px;
  color:var(--c-ink-2);
  line-height:1.75;
}
.tick-list li i{
  color:var(--c-accent);
  font-size:14px;
  margin-top:6px;
  flex:0 0 auto;
}

/* ============ FAQ ============ */
.faq-list{
  max-width:900px;
}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-left:2px solid transparent;
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.faq-item:has(.faq-btn[aria-expanded="true"]){
  border-left-color:var(--c-primary);
  box-shadow:var(--sh-2);
}
.faq-q{
  margin:0;
  font-size:16px;
}
.faq-btn{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 24px;
  font-size:16px;
  font-weight:600;
  color:var(--c-ink);
  text-align:left;
  transition:color .18s ease-out;
}
.faq-btn:hover{color:var(--c-primary);}
.faq-btn .fx{
  position:relative;
  flex:0 0 auto;
  width:18px;
  height:18px;
}
.faq-btn .fx::before,
.faq-btn .fx::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:var(--c-primary);
  border-radius:2px;
  transition:transform .22s ease-out,opacity .22s ease-out;
}
.faq-btn .fx::before{
  width:14px;
  height:2px;
  transform:translate(-50%,-50%);
}
.faq-btn .fx::after{
  width:2px;
  height:14px;
  transform:translate(-50%,-50%);
}
.faq-btn[aria-expanded="true"] .fx::after{
  transform:translate(-50%,-50%) rotate(90deg);
  opacity:0;
}
.faq-a{
  padding:0 24px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--c-ink-2);
  border-top:1px solid var(--c-line);
  padding-top:18px;
}

/* ============ 下载引导条 ============ */
.dl-bar{
  margin:0 0 88px;
  background:linear-gradient(90deg,rgba(232,240,251,.55),rgba(247,249,252,.3)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:28px 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.dl-bar h3{
  font-size:20px;
  color:var(--c-ink);
}
.dl-bar p{
  margin-top:6px;
  font-size:14.5px;
  color:var(--c-ink-2);
}
.dl-actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-bg);
  border-top:1px solid var(--c-line);
  padding:56px 0 0;
}
.ft-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:40px;
}
.ft-brand .brand{font-size:18px;}
.ft-brand p{
  margin-top:14px;
  font-size:14px;
  line-height:1.85;
  color:var(--c-ink-2);
  max-width:340px;
}
.ft-col h4{
  font-size:15px;
  font-weight:600;
  color:var(--c-ink);
  margin-bottom:16px;
}
.ft-col ul{
  display:grid;
  gap:10px;
}
.ft-col li,
.ft-col a,
.ft-col span{
  font-size:14px;
  color:var(--c-ink-2);
}
.ft-col a{
  position:relative;
  display:inline-block;
}
.ft-col a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:100%;
  height:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s ease-out;
}
.ft-col a:hover{color:var(--c-primary);}
.ft-col a:hover::after{transform:scaleX(1);}
.ft-bottom{
  border-top:1px solid var(--c-line);
  padding:20px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--c-ink-3);
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .scene-card{grid-template-columns:170px 1fr;}
}
@media (max-width:991.98px){
  .site-header .container-x{padding:0 20px;}
  .nav-toggle{display:inline-flex;}
  .nav-panel{
    flex:0 0 100%;
    order:3;
  }
  .nav-panel.collapse:not(.show){display:none;}
  .nav-panel.show,
  .nav-panel.collapsing{
    display:block !important;
    border-top:1px solid var(--c-line);
    margin-top:12px;
    padding:8px 0 16px;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-list > li > a{
    display:block;
    padding:14px 4px;
    font-size:16px;
    border-bottom:1px solid var(--c-line);
  }
  .nav-list > li:last-child > a{border-bottom:0;}
  .nav-list > li > a::after{display:none;}
  .nav-list > li > a.is-active{
    color:var(--c-primary);
    box-shadow:inset 2px 0 0 var(--c-primary);
    padding-left:12px;
  }
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-visual img{aspect-ratio:16/9;}
  .sec{padding:64px 0;}
  .dl-bar{margin-bottom:64px;}
  .timeline::before{left:6px;transform:none;}
  .tl-item{grid-template-columns:28px 1fr;margin-bottom:24px;}
  .tl-mid{grid-column:1;grid-row:1;justify-content:flex-start;padding-top:28px;}
  .tl-item .tl-card,
  .tl-item:nth-child(even) .tl-card{grid-column:2;grid-row:1;}
  .tl-item:nth-child(even) .tl-mid{grid-row:1;}
  .scene-grid{grid-template-columns:1fr;}
  .two-col{grid-template-columns:1fr;}
  .ft-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .ft-brand{grid-column:1/-1;}
}
@media (max-width:575.98px){
  .container-x{padding:0 20px;}
  body{font-size:15.5px;}
  .cat-hero{padding:36px 0 44px;}
  .sec{padding:52px 0;}
  .hero-strip{grid-template-columns:1fr 1fr;row-gap:16px;}
  .hero-strip > div:nth-child(3){border-left:0;padding-left:0;}
  .hero-strip > div{padding:12px 0 0;}
  .hero-actions{gap:12px;}
  .btn-x{width:100%;}
  .link-more{width:100%;justify-content:flex-start;}
  .scene-card{grid-template-columns:1fr;}
  .scene-cover img{min-height:170px;aspect-ratio:16/9;}
  .panel{padding:22px 20px;}
  .def-list div{grid-template-columns:1fr;gap:4px;}
  .tl-card{padding:20px;}
  .dl-bar{padding:24px 20px;margin-bottom:52px;}
  .dl-actions{width:100%;}
  .dl-actions .btn-x{width:100%;}
  .ft-grid{grid-template-columns:1fr;}
  .ft-bottom{flex-direction:column;align-items:flex-start;gap:6px;}
}