/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --c-primary:#1F5FD6;
  --c-primary-dark:#16459F;
  --c-primary-soft:#EAF1FD;
  --c-primary-tint:#F5F8FE;
  --c-accent:#FF6A2B;
  --c-accent-dark:#E85A1E;
  --c-teal:#0EA5A0;
  --bg-page:#F7F9FC;
  --bg-card:#FFFFFF;
  --bg-muted:#F0F4FA;
  --t1:#0E1A2B;
  --t2:#5B6B84;
  --t3:#8A98AC;
  --border:#E4EAF3;
  --divider:#EEF2F8;
  --r-xs:8px;
  --r-sm:12px;
  --r-md:16px;
  --r-lg:20px;
  --r-pill:999px;
  --sh1:0 2px 10px rgba(15,27,45,.05);
  --sh2:0 10px 28px rgba(15,27,45,.10);
  --sh3:0 24px 60px rgba(15,27,45,.18);
  --gap-1:8px;
  --gap-2:12px;
  --gap-3:16px;
  --gap-4:24px;
  --gap-5:32px;
  --gap-6:48px;
  --gap-7:64px;
  --gap-8:96px;
  --tr:.24s ease-out;
  --focus-ring:0 0 0 3px rgba(31,95,214,.35);
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--t1);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:800;line-height:1.32;color:var(--t1);letter-spacing:.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--tr);}
a:hover{color:var(--c-accent);}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--t1);}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:none;box-shadow:var(--focus-ring);border-radius:var(--r-xs);}
[id]{scroll-margin-top:110px;}

/* ============ 容器 ============ */
.container,
.grid-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
.sec{padding:96px 0;}
.sec-tight{padding:64px 0;}
.sec-head{max-width:760px;margin-bottom:var(--gap-6);}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1.5px;
  color:var(--c-primary);background:var(--c-primary-soft);
  border-radius:var(--r-pill);padding:4px 12px;margin-bottom:14px;
}
.sec-title{font-size:clamp(24px,3vw,32px);margin-bottom:12px;}
.sec-sub{color:var(--t2);font-size:16px;line-height:1.85;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;border:1px solid transparent;
  transition:transform var(--tr),background var(--tr),color var(--tr),box-shadow var(--tr),border-color var(--tr);
  white-space:nowrap;
}
.btn i{font-size:13px;transition:transform var(--tr);}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 6px 16px rgba(255,106,43,.24);}
.btn-accent:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,106,43,.28);}
.btn-accent:active{transform:translateY(1px);box-shadow:0 3px 10px rgba(255,106,43,.22);}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);transform:translateY(-1px);}
.btn-block{width:100%;}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--c-primary);
}
.link-more i{font-size:12px;transition:transform var(--tr);}
.link-more:hover{color:var(--c-accent);}
.link-more:hover i{transform:translateX(3px);}

/* ============ 徽章 ============ */
.badge{
  display:inline-block;font-size:11px;font-weight:700;letter-spacing:.6px;
  padding:3px 10px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary-dark);
}
.badge-teal{background:rgba(14,165,160,.12);color:#0B7C78;}
.badge-accent{background:rgba(255,106,43,.12);color:#C44A15;}

/* ============ 顶部通告条 ============ */
.notice-bar{background:var(--c-primary-soft);border-bottom:1px solid #DCE7FA;}
.notice-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:42px;flex-wrap:wrap;
}
.notice-text{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--c-primary-dark);font-weight:600;
}
.notice-text i{font-size:12px;color:var(--c-accent);}
.notice-link{font-size:13px;font-weight:700;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px;}
.notice-link i{font-size:11px;transition:transform var(--tr);}
.notice-link:hover i{transform:translateX(3px);}

/* ============ 顶部导航（卡片面板） ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:12px 0;
  transition:padding var(--tr);
}
.site-header.is-stuck{padding:6px 0;}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  background:#fff;border:1px solid var(--border);
  border-radius:var(--r-md);box-shadow:var(--sh1);
  padding:10px 16px;transition:box-shadow var(--tr),padding var(--tr);
}
.site-header.is-stuck .nav-panel{box-shadow:var(--sh2);padding:6px 16px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo:hover{color:inherit;}
.logo-mark{
  width:40px;height:40px;border-radius:var(--r-sm);
  background:var(--c-primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;flex:0 0 auto;
}
.logo-text{display:flex;flex-direction:column;line-height:1.18;}
.logo-text b{font-size:16px;font-weight:800;color:var(--t1);letter-spacing:.6px;}
.logo-text i{font-style:normal;font-size:12px;font-weight:700;color:var(--c-primary);letter-spacing:1.6px;}
.nav-cards{display:flex;align-items:center;gap:8px;margin-left:auto;}
.nav-card{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:9px 14px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;color:var(--t2);
  border:1px solid transparent;transition:all var(--tr);
}
.nav-card i{font-size:14px;color:var(--t3);transition:color var(--tr);}
.nav-card:hover{background:var(--c-primary-tint);color:var(--c-primary);border-color:var(--border);}
.nav-card:hover i{color:var(--c-primary);}
.nav-card.active{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.nav-card.active i{color:var(--c-primary-dark);}
.nav-card.active::before{
  content:"";position:absolute;left:-1px;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--c-accent);
}
.header-cta{flex:0 0 auto;}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--border);background:#fff;color:var(--t1);
  font-size:17px;align-items:center;justify-content:center;
}
.mobile-drawer{
  display:none;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-md);box-shadow:var(--sh3);
  margin-top:10px;padding:14px;
}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:flex;align-items:center;gap:10px;min-height:48px;padding:0 12px;
  border-radius:var(--r-sm);color:var(--t2);font-weight:700;font-size:15px;
}
.mobile-drawer a.active{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.mobile-drawer a i{color:var(--c-primary);width:18px;text-align:center;}
.mobile-drawer .btn{margin-top:10px;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:72px 0 84px;
  background:linear-gradient(180deg,#F5F8FE 0%,#F7F9FC 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(31,95,214,.13) 1px,transparent 1px);
  background-size:24px 24px;opacity:.55;
}
.hero::after{
  content:"";position:absolute;right:-160px;top:-120px;width:520px;height:520px;
  border:1px solid rgba(31,95,214,.12);border-radius:50%;pointer-events:none;
}
.hero-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;gap:48px;}
.hero-copy{flex:1 1 520px;min-width:0;}
.hero-figure{flex:1 1 380px;min-width:0;position:relative;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-pill);
  padding:6px 14px;font-size:13px;font-weight:700;color:var(--c-primary);
  box-shadow:var(--sh1);margin-bottom:20px;
}
.hero-tag i{color:var(--c-accent);font-size:12px;}
.hero h1{
  font-size:clamp(28px,4.2vw,50px);
  line-height:1.24;letter-spacing:.5px;margin-bottom:18px;
}
.hero h1 .hl{color:var(--c-primary);}
.hero-sub{
  font-size:17px;color:var(--t2);line-height:1.9;max-width:600px;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
.trust-row{display:flex;gap:12px;flex-wrap:wrap;}
.trust-card{
  flex:1 1 150px;min-width:140px;
  display:flex;align-items:center;gap:10px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-sm);
  padding:12px 14px;box-shadow:var(--sh1);
  font-size:14px;font-weight:700;color:var(--t1);
  transition:all var(--tr);
}
.trust-card i{color:var(--c-primary);font-size:15px;}
.trust-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D8E3F5;}
.hero-media{
  border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh2);border:1px solid var(--border);background:#fff;
}
.hero-media img{width:100%;height:380px;object-fit:cover;}
.hero-float{
  position:absolute;left:-14px;bottom:24px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  box-shadow:var(--sh2);padding:14px 18px;min-width:214px;
}
.hero-float .row{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  font-size:13px;color:var(--t2);
}
.hero-float .row + .row{margin-top:8px;}
.hero-float .row b{color:var(--t1);font-weight:800;font-size:13px;}
.hero-float .dot{
  display:inline-flex;align-items:center;gap:6px;color:var(--c-teal);font-weight:700;
}
.hero-float .dot::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--c-teal);
}

/* ============ 痛点区 ============ */
.pain-grid{display:flex;flex-wrap:wrap;gap:20px;}
.pain-card{
  flex:1 1 250px;min-width:238px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:26px 24px;box-shadow:var(--sh1);
  display:flex;flex-direction:column;gap:14px;
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.pain-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D8E3F5;}
.pain-icon{
  width:46px;height:46px;border-radius:50%;
  background:var(--c-primary-tint);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;
  transition:background var(--tr),color var(--tr);
}
.pain-card:hover .pain-icon{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.pain-card h3{font-size:18px;line-height:1.5;}
.pain-card p{font-size:14px;color:var(--t2);line-height:1.8;flex:1;}

/* ============ 方案区（错位栅格） ============ */
.plan-wrap{display:flex;flex-wrap:wrap;gap:20px;align-items:stretch;}
.plan-feature{
  flex:1 1 380px;min-width:300px;
  background:var(--c-primary-soft);border:1px solid #D5E4FB;
  border-radius:var(--r-md);padding:28px;
  display:flex;flex-direction:column;gap:16px;
  transition:transform var(--tr),box-shadow var(--tr);
}
.plan-feature:hover{transform:translateY(-4px);box-shadow:var(--sh2);}
.plan-feature .pf-icon{
  width:46px;height:46px;border-radius:var(--r-sm);background:#fff;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;
}
.plan-feature h3{font-size:20px;}
.plan-feature .pf-shot{
  border-radius:var(--r-sm);overflow:hidden;border:1px solid #D5E4FB;margin-top:auto;
}
.plan-feature .pf-shot img{width:100%;height:150px;object-fit:cover;}
.plan-side{flex:1 1 420px;min-width:300px;display:flex;flex-wrap:wrap;gap:20px;}
.plan-card{
  flex:1 1 190px;min-width:180px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh1);display:flex;flex-direction:column;gap:14px;
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D8E3F5;}
.plan-card:nth-child(3){flex-basis:240px;}
.plan-card h3{font-size:17px;line-height:1.5;}
.plan-card .pc-icon{color:var(--c-primary);font-size:18px;}
.point-list{display:flex;flex-direction:column;gap:8px;flex:1;}
.point-list li{
  position:relative;padding-left:14px;font-size:14px;color:var(--t2);line-height:1.75;
}
.point-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:4px;height:4px;border-radius:50%;background:var(--c-primary);
}

/* ============ 数据条 ============ */
.data-band{
  background:var(--c-primary-dark);
  border-radius:var(--r-md);
  padding:38px 32px 26px;
  color:#fff;
  box-shadow:var(--sh2);
  position:relative;overflow:hidden;
}
.data-band::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,.35),rgba(255,255,255,0));
}
.data-grid{display:flex;flex-wrap:wrap;gap:24px;}
.data-item{flex:1 1 180px;min-width:150px;}
.data-num{
  font-size:clamp(32px,4.6vw,52px);font-weight:800;line-height:1.1;
  font-variant-numeric:tabular-nums;letter-spacing:-1px;
}
.data-num span{font-size:18px;font-weight:700;margin-left:4px;}
.data-label{font-size:13px;color:rgba(255,255,255,.78);margin-top:8px;line-height:1.7;}
.data-foot{
  margin-top:26px;padding-top:16px;border-top:1px solid rgba(255,255,255,.16);
  font-size:12px;color:rgba(255,255,255,.62);line-height:1.7;
}

/* ============ 最新信息 ============ */
.news-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-bottom:22px;
}
.chip-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 16px;border-radius:var(--r-pill);
  border:1px solid var(--border);background:#fff;
  font-size:13px;font-weight:700;color:var(--t2);
  transition:all var(--tr);
}
.chip:hover{border-color:#C9D9F4;color:var(--c-primary);}
.chip.active{background:var(--c-primary-soft);color:var(--c-primary-dark);border-color:#D5E4FB;}
.news-grid{margin-bottom:-24px;}
.news-cell{margin-bottom:24px;}
.news-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh1);color:inherit;
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D8E3F5;color:inherit;}
.news-thumb{position:relative;background:var(--bg-muted);}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-thumb .badge{position:absolute;left:12px;top:12px;background:#fff;color:var(--c-primary-dark);}
.news-body{padding:20px 22px 18px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-title{
  font-size:17px;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--tr);
}
.news-card:hover .news-title{color:var(--c-primary);}
.news-desc{
  font-size:14px;color:var(--t2);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex:1;
}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px solid var(--divider);
  font-size:12.5px;color:var(--t3);
}
.news-meta i{margin-right:4px;}
.news-more{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--c-primary);}
.news-more i{font-size:11px;transition:transform var(--tr);}
.news-card:hover .news-more i{transform:translateX(3px);}
.empty-state{
  min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:#fff;border:1px dashed var(--border);border-radius:var(--r-md);
  color:var(--t2);font-size:14px;text-align:center;padding:32px;
}
.empty-state i{font-size:28px;color:var(--t3);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  overflow:hidden;transition:box-shadow var(--tr),border-color var(--tr);
}
.faq-item:hover{border-color:#D8E3F5;}
.faq-item.open{box-shadow:var(--sh2);border-color:#D8E3F5;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;text-align:left;
  padding:20px 22px;font-size:16px;font-weight:700;color:var(--t1);
  transition:color var(--tr);
}
.faq-q:hover{color:var(--c-primary);}
.faq-sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--c-primary-tint);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:13px;
  transition:transform var(--tr),background var(--tr),color var(--tr);
}
.faq-item.open .faq-sign{background:var(--c-primary);color:#fff;transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .2s ease-out;
  border-left:3px solid transparent;
}
.faq-item.open .faq-a{max-height:520px;border-left-color:var(--c-accent);}
.faq-a p{padding:0 22px 22px 22px;font-size:14.5px;color:var(--t2);line-height:1.9;}

/* ============ 表单区 ============ */
.apply-wrap{display:flex;flex-wrap:wrap;gap:36px;align-items:flex-start;}
.apply-aside{flex:1 1 300px;min-width:260px;}
.apply-aside h2{font-size:clamp(23px,2.8vw,30px);margin-bottom:14px;}
.apply-aside p{color:var(--t2);font-size:15px;line-height:1.9;margin-bottom:22px;}
.gain-list{display:flex;flex-direction:column;gap:12px;}
.gain-list li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14.5px;font-weight:600;color:var(--t1);
}
.gain-list i{color:var(--c-teal);font-size:14px;margin-top:5px;}
.form-card{
  flex:1 1 480px;min-width:300px;max-width:720px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  box-shadow:var(--sh1);padding:30px;
}
.form-grid{display:flex;flex-wrap:wrap;gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;flex:1 1 220px;min-width:0;}
.field.full{flex-basis:100%;}
.field label{font-size:13.5px;font-weight:700;color:var(--t1);}
.field label .req{color:var(--c-accent);margin-left:2px;}
.field input,
.field select,
.field textarea{
  width:100%;min-height:48px;padding:0 14px;
  border:1px solid var(--border);border-radius:var(--r-sm);
  background:#fff;transition:border-color var(--tr),box-shadow var(--tr);
}
.field textarea{min-height:112px;padding:12px 14px;resize:vertical;line-height:1.8;}
.field select{
  appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%235B6B84' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;
  padding-right:40px;
}
.field input::placeholder,.field textarea::placeholder{color:var(--t3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(31,95,214,.14);
}
.field .hint{font-size:12.5px;color:var(--t3);}
.agree-row{
  display:flex;align-items:flex-start;gap:10px;
  flex-basis:100%;font-size:13.5px;color:var(--t2);line-height:1.7;
}
.agree-row input{width:18px;height:18px;min-height:18px;margin-top:4px;accent-color:var(--c-primary);}
.form-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;flex-basis:100%;}
.form-msg{font-size:13.5px;font-weight:700;color:var(--c-teal);display:none;}
.form-msg.show{display:block;}

/* ============ 隐私说明条 ============ */
.privacy-bar{background:var(--bg-muted);border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);}
.privacy-inner{
  padding:20px 0;font-size:12.5px;color:var(--t2);line-height:1.9;
}
.privacy-inner a{font-weight:700;}

/* ============ 页脚前置 CTA ============ */
.cta-band{
  background:var(--c-primary);border-radius:var(--r-md);
  padding:52px 40px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:var(--sh2);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.8vw,30px);margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.82);font-size:15px;max-width:620px;line-height:1.85;}

/* ============ 页脚 ============ */
.site-footer{background:#0E1A2B;color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0;}
.footer-grid{display:flex;flex-wrap:wrap;gap:40px;padding-bottom:44px;}
.footer-brand{flex:1 1 300px;min-width:260px;}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.footer-logo .logo-mark{background:rgba(255,255,255,.12);color:#fff;}
.footer-logo .logo-text b{color:#fff;}
.footer-logo .logo-text i{color:#8FB6F5;}
.footer-brand p{font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.6);max-width:340px;}
.footer-col{flex:1 1 180px;min-width:150px;}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:800;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);}
.footer-col a:hover{color:#fff;}
.footer-col li{font-size:14px;color:rgba(255,255,255,.68);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.5);
}
.footer-links{display:flex;gap:18px;flex-wrap:wrap;}
.footer-links a{font-size:12.5px;color:rgba(255,255,255,.6);}
.footer-links a:hover{color:#fff;}

/* ============ 悬浮按钮 / 弹层 ============ */
.float-btn{
  position:fixed;right:28px;bottom:28px;z-index:90;
  display:inline-flex;align-items:center;gap:8px;
  min-height:50px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--c-accent);color:#fff;font-weight:700;font-size:15px;border:0;
  box-shadow:0 12px 30px rgba(255,106,43,.34);
  transition:transform var(--tr),background var(--tr);
}
.float-btn:hover{background:var(--c-accent-dark);transform:translateY(-2px);}
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:#fff;border-top:1px solid var(--border);
  padding:10px 16px;box-shadow:0 -6px 20px rgba(15,27,45,.08);
}
.mobile-bar .btn{width:100%;}
.reveal-mask{
  position:fixed;inset:0;z-index:100;background:rgba(14,26,43,.45);
  display:none;align-items:center;justify-content:center;padding:20px;
}
.reveal-mask.open{display:flex;}
.reveal-card{
  position:relative;background:#fff;border-radius:var(--r-md);
  box-shadow:var(--sh3);width:480px;max-width:100%;
  padding:30px;animation:pop .2s ease-out;
}
@keyframes pop{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:translateY(0);}}
.reveal-card h3{font-size:20px;margin-bottom:8px;}
.reveal-card > p{font-size:14px;color:var(--t2);margin-bottom:20px;line-height:1.8;}
.reveal-close{
  position:absolute;right:14px;top:14px;width:36px;height:36px;
  border:0;border-radius:50%;background:var(--bg-muted);color:var(--t2);
  display:flex;align-items:center;justify-content:center;font-size:14px;
  transition:background var(--tr),color var(--tr);
}
.reveal-close:hover{background:var(--c-primary-soft);color:var(--c-primary);}
.reveal-card .field{margin-bottom:16px;}
body.drawer-open{overflow:hidden;}

/* ============ 响应式 ============ */
@media screen and (max-width:1024px){
  .sec{padding:72px 0;}
  .hero{padding:56px 0 64px;}
  .hero-inner{gap:36px;}
  .nav-card{padding:8px 11px;font-size:14px;}
  .header-cta .btn{padding:0 18px;font-size:14px;}
}
@media screen and (max-width:980px){
  .nav-cards,.header-cta{display:none;}
  .menu-toggle{display:inline-flex;margin-left:auto;}
  .mobile-drawer{position:absolute;left:20px;right:20px;top:100%;}
  .site-header .container{position:relative;}
}
@media screen and (max-width:768px){
  .sec{padding:56px 0;}
  .hero-media img{height:280px;}
  .hero-float{position:static;margin-top:14px;left:auto;bottom:auto;}
  .cta-band{padding:36px 24px;}
  .form-card{padding:22px;}
  .float-btn{display:none;}
  .mobile-bar{display:block;}
  body{padding-bottom:74px;}
  .data-band{padding:28px 22px 22px;}
}
@media screen and (max-width:520px){
  .container,.grid-container{padding-left:16px;padding-right:16px;}
  .hero h1{font-size:28px;}
  .hero-sub{font-size:15.5px;}
  .btn{width:100%;}
  .hero-actions .btn{width:100%;}
  .trust-row{gap:10px;}
  .trust-card{flex:1 1 100%;}
  .pain-card,.plan-card,.plan-feature{padding:22px 20px;}
  .sec-title{font-size:23px;}
  .footer-grid{gap:28px;}
  .reveal-card{padding:24px 20px;}
  .notice-inner{justify-content:flex-start;}
  .mobile-drawer{left:16px;right:16px;}
}

/* roulang page: category1 */
:root{
  --c-primary:#1F5FD6;
  --c-primary-dark:#16459F;
  --c-primary-light:#EAF1FD;
  --c-primary-soft:#F5F8FE;
  --c-accent:#FF6A2B;
  --c-accent-dark:#E85A1E;
  --c-teal:#0EA5A0;
  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-text:#0E1A2B;
  --c-text-2:#5B6B84;
  --c-text-3:#8A98AC;
  --c-border:#E4EAF3;
  --c-line:#EEF2F8;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:8px;
  --r-pill:999px;
  --sh-1:0 2px 10px rgba(15,27,45,.05);
  --sh-2:0 10px 28px rgba(15,27,45,.10);
  --sh-3:0 24px 60px rgba(15,27,45,.18);
  --sp-1:8px;
  --sp-2:12px;
  --sp-3:16px;
  --sp-4:24px;
  --sp-5:32px;
  --sp-6:48px;
  --sp-7:72px;
  --sp-8:104px;
  --t-fast:180ms ease-out;
  --t:240ms ease-out;
  --t-slow:320ms ease-out;
  --w-container:1200px;
  --w-read:760px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:1.1em;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--t-fast);}
a:hover{color:var(--c-accent);}
img{max-width:100%;display:block;border-radius:var(--r-md);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;padding:0;}
:focus-visible{outline:3px solid rgba(31,95,214,.35);outline-offset:2px;border-radius:6px;}
.container{
  width:100%;
  max-width:var(--w-container);
  margin:0 auto;
  padding:0 24px;
}
/* 顶部通告条 */
.topbar{
  background:var(--c-primary-light);
  border-bottom:1px solid #DCE8FB;
  font-size:13px;
  color:var(--c-primary-dark);
}
.topbar-inner{
  display:flex;
  align-items:center;
  gap:12px;
  min-height:44px;
  padding-top:6px;
  padding-bottom:6px;
}
.topbar-text{display:inline-flex;align-items:center;gap:8px;font-weight:600;}
.topbar-link{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:600;
  color:var(--c-primary);
  white-space:nowrap;
}
.topbar-link i{font-size:11px;transition:transform var(--t-fast);}
.topbar-link:hover i{transform:translateX(3px);}
.topbar-close{
  width:26px;height:26px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  color:#7C93BF;font-size:12px;transition:background var(--t-fast),color var(--t-fast);
}
.topbar-close:hover{background:#DCE8FB;color:var(--c-primary-dark);}
.topbar.is-hidden{display:none;}
/* 头部 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--t),padding var(--t);
}
.site-header.is-stuck{box-shadow:var(--sh-2);}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  padding-top:14px;
  padding-bottom:14px;
  transition:padding var(--t);
}
.site-header.is-stuck .header-inner{padding-top:8px;padding-bottom:8px;}
.logo{
  display:inline-flex;align-items:center;gap:10px;flex-shrink:0;
  color:var(--c-text);
}
.logo:hover{color:var(--c-text);}
.logo-mark{
  width:40px;height:40px;border-radius:11px;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-primary-dark) 100%);
  color:#fff;display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;flex-shrink:0;
  box-shadow:0 4px 12px rgba(31,95,214,.24);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-text b{font-size:16px;font-weight:800;letter-spacing:.3px;}
.logo-text i{font-style:normal;font-size:11.5px;color:var(--c-text-3);letter-spacing:1.6px;}
/* 卡片化导航 */
.nav-cards{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  background:var(--c-primary-soft);
  border:1px solid var(--c-border);
  border-radius:var(--r-lg);
  padding:8px 10px;
  box-shadow:var(--sh-1);
}
.nav-card{
  position:relative;
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px 9px 18px;
  border-radius:var(--r-md);
  font-size:14.5px;font-weight:600;
  color:var(--c-text-2);
  white-space:nowrap;
  transition:background var(--t),color var(--t),transform var(--t);
}
.nav-card i{font-size:13px;color:var(--c-text-3);transition:color var(--t);}
.nav-card:hover{background:var(--c-surface);color:var(--c-primary);transform:translateY(-1px);}
.nav-card:hover i{color:var(--c-primary);}
.nav-card.active{background:var(--c-surface);color:var(--c-primary);box-shadow:var(--sh-1);}
.nav-card.active i{color:var(--c-primary);}
.nav-card.active::before{
  content:"";position:absolute;left:5px;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:2px;background:var(--c-accent);
}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:14px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;border-radius:var(--r-md);
  border:1px solid var(--c-border);
  color:var(--c-text);align-items:center;justify-content:center;
  background:#fff;
}
.nav-toggle:hover{background:var(--c-primary-soft);color:var(--c-primary);}
/* 移动抽屉 */
.mobile-drawer{
  display:none;
  border-top:1px solid var(--c-line);
  background:#fff;
  padding:14px 0 20px;
}
.mobile-drawer.is-open{display:block;}
.drawer-title{
  font-size:12px;color:var(--c-text-3);letter-spacing:1.4px;
  margin:0 0 10px;font-weight:700;
}
.drawer-list{display:flex;flex-direction:column;gap:10px;}
.drawer-link{
  display:flex;align-items:center;gap:12px;
  padding:14px 16px;border-radius:var(--r-md);
  background:var(--c-primary-soft);
  border:1px solid var(--c-border);
  color:var(--c-text);font-weight:600;font-size:15px;
}
.drawer-link i{color:var(--c-primary);width:18px;text-align:center;}
.drawer-link.active{background:var(--c-primary-light);border-color:#C9DCF8;}
.drawer-link:hover{color:var(--c-primary);border-color:#C9DCF8;}
/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;
  border-radius:var(--r-md);
  font-size:15px;font-weight:700;
  border:1px solid transparent;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t-fast),box-shadow var(--t);
  white-space:nowrap;
}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--c-accent);color:#fff;box-shadow:0 4px 14px rgba(255,106,43,.26);}
.btn-primary:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 1px 6px rgba(255,106,43,.3);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:#C9DCF8;}
.btn-ghost:hover{background:var(--c-primary-light);color:var(--c-primary-dark);border-color:#B6D0F5;transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-white{background:#fff;color:var(--c-primary-dark);}
.btn-white:hover{background:#F2F6FF;color:var(--c-primary-dark);transform:translateY(-1px);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--c-primary);
}
.link-arrow i{font-size:11px;transition:transform var(--t-fast);}
.link-arrow:hover{color:var(--c-accent);}
.link-arrow:hover i{transform:translateX(3px);}
/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--r-pill);
  font-size:11.5px;font-weight:700;letter-spacing:.4px;
  background:var(--c-primary-light);color:var(--c-primary);
}
.badge-teal{background:rgba(14,165,160,.12);color:#0B7F7B;}
.badge-accent{background:rgba(255,106,43,.12);color:#C94E12;}
/* Hero */
.hero{
  position:relative;
  overflow:hidden;
  background-image:linear-gradient(112deg,rgba(234,241,253,.96) 0%,rgba(245,248,254,.90) 48%,rgba(234,241,253,.74) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center 30%;
  border-bottom:1px solid var(--c-line);
}
.hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,95,214,.10) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.55;
  pointer-events:none;
}
.hero-inner{
  position:relative;z-index:2;
  padding:40px 0 56px;
  min-height:270px;
  display:flex;flex-direction:column;justify-content:center;
}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--c-text-3);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--c-text-2);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:#C2CDDE;}
.breadcrumb .current{color:var(--c-text);font-weight:600;}
.hero h1{
  font-size:clamp(28px,4vw,44px);
  line-height:1.28;
  font-weight:800;
  letter-spacing:-.4px;
  max-width:840px;
  color:var(--c-text);
}
.hero-lead{
  margin-top:16px;
  font-size:17px;line-height:1.75;
  color:var(--c-text-2);
  max-width:660px;
}
.hero-actions{
  display:flex;flex-wrap:wrap;gap:14px;
  margin-top:28px;
}
.hero-tags{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:26px;
  list-style:none;padding:0;
}
.hero-tags li{
  display:inline-flex;align-items:center;gap:7px;
  background:rgba(255,255,255,.86);
  border:1px solid var(--c-border);
  border-radius:var(--r-pill);
  padding:7px 15px;
  font-size:13px;font-weight:600;color:var(--c-text-2);
  box-shadow:var(--sh-1);
}
.hero-tags li i{color:var(--c-teal);font-size:12px;}
/* 通用板块 */
.section{padding:var(--sp-7) 0;}
.section-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.section-head{max-width:720px;margin-bottom:var(--sp-6);}
.eyebrow{
  display:inline-block;
  font-size:12.5px;font-weight:700;letter-spacing:1.6px;
  color:var(--c-primary);
  background:var(--c-primary-light);
  border-radius:var(--r-pill);
  padding:4px 12px;
  margin-bottom:16px;
}
.section-title{
  font-size:clamp(24px,2.8vw,32px);
  font-weight:800;line-height:1.34;letter-spacing:-.3px;
}
.section-sub{
  margin-top:14px;
  font-size:16.5px;color:var(--c-text-2);line-height:1.8;
}
/* 介绍段 */
.intro-panel{
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:34px 36px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:38px;
  align-items:start;
}
.intro-panel p{color:var(--c-text-2);margin-bottom:18px;}
.intro-panel p:last-child{margin-bottom:0;}
.intro-side{
  background:var(--c-primary-soft);
  border:1px dashed #CFDDF3;
  border-radius:var(--r-md);
  padding:22px;
}
.intro-side h3{font-size:16px;font-weight:800;margin-bottom:12px;}
.intro-side ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px;}
.intro-side li{
  display:flex;gap:10px;font-size:14px;line-height:1.7;color:var(--c-text-2);
}
.intro-side li i{color:var(--c-teal);margin-top:5px;font-size:12px;}
/* 要点卡 */
.point-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.point-card{
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-lg);
  padding:26px 24px;
  box-shadow:var(--sh-1);
  display:flex;flex-direction:column;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.point-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh-2);
  border-color:#D8E3F5;
}
.point-icon{
  width:48px;height:48px;border-radius:14px;
  background:var(--c-primary-light);
  color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:19px;margin-bottom:18px;
  transition:background var(--t),color var(--t);
}
.point-card:hover .point-icon{background:var(--c-primary);color:#fff;}
.point-card h3{font-size:18px;font-weight:800;line-height:1.5;letter-spacing:-.2px;}
.point-card p{
  margin-top:10px;
  font-size:14.5px;line-height:1.8;color:var(--c-text-2);
  flex:1;
}
.point-card .link-arrow{margin-top:18px;}
/* 图文交替 */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:28px;
}
.split + .split{margin-top:28px;}
.split-media{position:relative;}
.split-media img{
  border-radius:var(--r-lg);
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  box-shadow:var(--sh-1);
}
.split-media .float-tag{
  position:absolute;left:16px;bottom:16px;
  background:#fff;
  border-radius:var(--r-md);
  padding:10px 14px;
  box-shadow:var(--sh-2);
  font-size:13px;font-weight:700;color:var(--c-primary-dark);
  display:inline-flex;align-items:center;gap:8px;
}
.split-media .float-tag i{color:var(--c-accent);}
.split-body h2{
  font-size:clamp(21px,2.2vw,26px);
  font-weight:800;line-height:1.4;letter-spacing:-.3px;
}
.split-body p{margin-top:14px;color:var(--c-text-2);font-size:15.5px;}
.check-list{
  list-style:none;padding:0;margin:20px 0 0;
  display:flex;flex-direction:column;gap:11px;
}
.check-list li{
  display:flex;gap:10px;font-size:14.5px;color:var(--c-text-2);line-height:1.7;
}
.check-list li i{color:var(--c-primary);margin-top:5px;font-size:12px;}
.split.reverse .split-media{order:2;}
.split.reverse .split-body{order:1;}
/* FAQ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:border-color var(--t),box-shadow var(--t);
}
.faq-item:hover{border-color:#D8E3F5;}
.faq-item.open{box-shadow:var(--sh-2);border-color:#D8E3F5;}
.faq-q{
  width:100%;
  display:flex;align-items:center;gap:14px;
  text-align:left;
  padding:22px 24px;
  font-size:16.5px;font-weight:700;line-height:1.6;
  color:var(--c-text);
  position:relative;
}
.faq-q::before{
  content:"";
  position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:0 3px 3px 0;
  background:var(--c-accent);
  transition:height var(--t-fast);
}
.faq-item.open .faq-q::before{height:60%;}
.faq-q .faq-icon{
  margin-left:auto;flex-shrink:0;
  width:28px;height:28px;border-radius:50%;
  background:var(--c-primary-soft);
  color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;
  transition:transform var(--t-fast),background var(--t-fast),color var(--t-fast);
}
.faq-item.open .faq-q .faq-icon{transform:rotate(180deg);background:var(--c-primary);color:#fff;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height var(--t-slow);
}
.faq-a-inner{
  padding:0 24px 24px 24px;
  font-size:15px;line-height:1.85;color:var(--c-text-2);
}
/* CTA 带 */
.cta-band{
  background:linear-gradient(120deg,var(--c-primary) 0%,var(--c-primary-dark) 100%);
  color:#fff;
  border-radius:var(--r-lg);
  padding:56px 48px;
  position:relative;
  overflow:hidden;
  box-shadow:var(--sh-2);
}
.cta-band::after{
  content:"";
  position:absolute;right:-60px;top:-60px;
  width:280px;height:280px;border-radius:50%;
  border:1px solid rgba(255,255,255,.16);
  box-shadow:0 0 0 40px rgba(255,255,255,.05);
}
.cta-band h2{
  font-size:clamp(22px,2.6vw,30px);
  font-weight:800;line-height:1.4;position:relative;z-index:2;
  letter-spacing:-.3px;
}
.cta-band p{
  margin-top:14px;
  font-size:16px;line-height:1.8;
  color:rgba(255,255,255,.86);
  max-width:620px;
  position:relative;z-index:2;
}
.cta-actions{
  margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;
  position:relative;z-index:2;
}
.cta-links{
  margin-top:30px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.18);
  display:flex;flex-wrap:wrap;gap:22px;
  position:relative;z-index:2;
  font-size:14px;
}
.cta-links a{color:rgba(255,255,255,.9);display:inline-flex;align-items:center;gap:7px;font-weight:600;}
.cta-links a:hover{color:#fff;}
.cta-links a i{font-size:11px;}
/* 页脚 */
.site-footer{
  background:#0E1A2B;
  color:#9FB0C6;
  padding:64px 0 26px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:40px;
}
.footer-brand p{
  margin-top:18px;
  font-size:14px;line-height:1.85;color:#8FA2BC;
  max-width:340px;
}
.footer-logo{display:inline-flex;align-items:center;gap:10px;}
.footer-logo .logo-mark{
  background:linear-gradient(135deg,var(--c-primary) 0%,#2C7BE5 100%);
  box-shadow:none;
}
.footer-logo .logo-text b{color:#fff;font-size:16px;font-weight:800;}
.footer-logo .logo-text i{color:#8FA2BC;font-size:11.5px;letter-spacing:1.6px;font-style:normal;}
.footer-col h4{
  color:#fff;font-size:14.5px;font-weight:800;
  margin-bottom:18px;letter-spacing:.5px;
}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px;}
.footer-col li,.footer-col a{font-size:14px;color:#93A6C0;line-height:1.7;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:16px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:#7C8FA9;
}
.footer-links{display:flex;flex-wrap:wrap;gap:20px;}
.footer-links a{font-size:13px;color:#93A6C0;}
.footer-links a:hover{color:#fff;}
/* 响应式 */
@media screen and (max-width:1280px){
  .nav-card{padding:9px 13px 9px 15px;font-size:14px;}
}
@media screen and (max-width:1024px){
  .nav-cards{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-actions .btn{display:none;}
  .intro-panel{grid-template-columns:1fr;gap:26px;padding:28px;}
  .point-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{grid-template-columns:1fr;gap:26px;}
  .split.reverse .split-media{order:0;}
  .split.reverse .split-body{order:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .section{padding:64px 0;}
}
@media screen and (max-width:768px){
  .container{padding:0 18px;}
  .hero-inner{padding:30px 0 42px;min-height:230px;}
  .hero-lead{font-size:16px;}
  .hero-actions .btn{flex:1 1 100%;}
  .section{padding:52px 0;}
  .section-head{margin-bottom:32px;}
  .point-grid{grid-template-columns:1fr;}
  .cta-band{padding:36px 24px;}
  .cta-actions .btn{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media screen and (max-width:520px){
  body{font-size:15.5px;}
  .logo-text b{font-size:15px;}
  .hero h1{letter-spacing:-.2px;}
  .split{padding:18px;}
  .intro-panel{padding:22px;}
  .faq-q{padding:18px 18px;font-size:15.5px;}
  .faq-a-inner{padding:0 18px 20px;}
  .topbar-link span{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: article */
:root{
  --blue:#1F5FD6;
  --blue-dark:#16459F;
  --blue-light:#EAF1FD;
  --blue-ultra:#F5F8FE;
  --orange:#FF6A2B;
  --orange-dark:#E85A1E;
  --teal:#0EA5A0;
  --bg:#F7F9FC;
  --card:#FFFFFF;
  --text:#0E1A2B;
  --text-2:#5B6B84;
  --text-3:#8A98AC;
  --border:#E4EAF3;
  --line:#EEF2F8;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 2px 10px rgba(15,27,45,.05);
  --sh-2:0 10px 28px rgba(15,27,45,.10);
  --sh-3:0 24px 60px rgba(15,27,45,.18);
  --t:240ms cubic-bezier(.2,.7,.3,1);
  --sp-1:8px; --sp-2:12px; --sp-3:16px; --sp-4:24px; --sp-5:32px; --sp-6:48px; --sp-7:72px; --sp-8:96px;
  --reading:760px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px;line-height:1.8;color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.32;letter-spacing:.2px;color:var(--text);}
p{margin:0;}
img{max-width:100%;display:block;border:0;}
a{color:var(--blue);text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t),box-shadow var(--t);}
a:hover{color:var(--orange);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,select,textarea{font:inherit;}
table{border-collapse:collapse;}
:focus-visible{outline:3px solid rgba(31,95,214,.35);outline-offset:2px;border-radius:6px;}
.container{max-width:var(--container);margin:0 auto;padding:0 20px;width:100%;}
.grid-container{max-width:var(--container);padding-left:20px;padding-right:20px;}

/* ============ 顶部通告条 ============ */
.topbar{background:var(--blue-light);border-bottom:1px solid #DBE7FB;font-size:13.5px;color:var(--blue-dark);}
.topbar-inner{display:flex;align-items:center;gap:16px;min-height:42px;}
.topbar-inner p{flex:1;display:flex;align-items:center;gap:8px;line-height:1.5;}
.topbar-inner p i{color:var(--orange);}
.topbar-inner a{color:var(--blue-dark);font-weight:700;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.topbar-inner a:hover{color:var(--orange);}
.topbar-close{width:30px;height:30px;border-radius:8px;color:var(--text-3);font-size:16px;line-height:1;display:grid;place-items:center;transition:background-color var(--t),color var(--t);}
.topbar-close:hover{background:#fff;color:var(--blue);}
.topbar.is-hidden{display:none;}

/* ============ 头部导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-1);transition:box-shadow var(--t);}
.site-header.is-scrolled{box-shadow:var(--sh-2);}
.header-inner{display:flex;align-items:center;gap:22px;padding:14px 20px;transition:padding var(--t);}
.site-header.is-scrolled .header-inner{padding:8px 20px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{width:38px;height:38px;flex:0 0 auto;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:16px;box-shadow:0 6px 16px rgba(31,95,214,.24);}
.logo-text{display:flex;flex-direction:column;line-height:1.18;}
.logo-text b{font-size:17px;font-weight:800;color:var(--text);letter-spacing:.5px;}
.logo-text i{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:3.2px;}
.nav-cards{display:flex;align-items:center;gap:8px;flex:1;flex-wrap:wrap;}
.nav-card{display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:12px;border:1px solid transparent;color:var(--text-2);font-size:14.5px;font-weight:600;transition:background-color var(--t),color var(--t),border-color var(--t),box-shadow var(--t);}
.nav-card i{font-size:14px;color:var(--text-3);transition:color var(--t);}
.nav-card:hover{background:var(--blue-ultra);color:var(--blue);border-color:var(--border);}
.nav-card:hover i{color:var(--blue);}
.nav-card.active{background:var(--blue-light);color:var(--blue-dark);box-shadow:inset 3px 0 0 var(--orange);}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--border);background:#fff;color:var(--text-2);place-items:center;font-size:17px;transition:background-color var(--t),color var(--t),border-color var(--t);}
.nav-toggle:hover{background:var(--blue-ultra);color:var(--blue);border-color:#C9DBF8;}
.nav-drawer{display:none;}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:12px;font-size:15px;font-weight:700;border:1px solid transparent;white-space:nowrap;transition:transform var(--t),background-color var(--t),color var(--t),box-shadow var(--t),border-color var(--t);}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 8px 20px rgba(255,106,43,.24);}
.btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,106,43,.30);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(255,106,43,.24);}
.btn-ghost{background:#fff;color:var(--blue);border-color:#C9DBF8;}
.btn-ghost:hover{background:var(--blue-light);color:var(--blue-dark);border-color:var(--blue);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:11px;}
.btn-block{width:100%;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--blue);}
.link-more i{font-size:12px;transition:transform var(--t);}
.link-more:hover{color:var(--orange);}
.link-more:hover i{transform:translateX(3px);}

/* ============ 徽章 / 标签 ============ */
.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:var(--r-pill);font-size:11.5px;font-weight:700;letter-spacing:.3px;line-height:1.7;}
.badge-blue{background:var(--blue-light);color:var(--blue-dark);}
.badge-teal{background:rgba(14,165,160,.12);color:#0B7C78;}
.badge-orange{background:rgba(255,106,43,.12);color:#D9500F;}

/* ============ 面包屑 ============ */
.crumbs-wrap{padding:22px 0 0;}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);}
.crumbs a{color:var(--text-2);font-weight:600;}
.crumbs a:hover{color:var(--orange);}
.crumbs .sep{color:#C3CEDF;}
.crumbs .current{color:var(--text);font-weight:600;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章头部 ============ */
.article-hero{padding:22px 0 0;}
.article-hero-inner{position:relative;overflow:hidden;border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:36px 40px 32px;background:var(--blue-ultra) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;}
.article-hero-inner::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.93) 55%,rgba(255,255,255,.86) 100%);}
.article-hero-inner::after{content:"";position:absolute;right:-70px;bottom:-90px;width:280px;height:280px;border-radius:50%;border:1px solid rgba(31,95,214,.14);box-shadow:0 0 0 34px rgba(31,95,214,.05);pointer-events:none;}
.article-hero .inner{position:relative;z-index:1;}
.article-hero h1{font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.3;letter-spacing:.4px;margin:16px 0 16px;}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:13.5px;color:var(--text-3);}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--blue);font-size:13px;}
.title-rule{display:block;width:58px;height:3px;border-radius:var(--r-pill);background:var(--blue);margin-top:20px;}

/* ============ 文章主体 ============ */
.article-section{padding:32px 0 76px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:start;}
.article-main{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:38px 40px 40px;min-width:0;}
.article-content{max-width:var(--reading);margin:0 auto;font-size:16.5px;line-height:1.85;color:#233047;word-break:break-word;}
.article-content > *:first-child{margin-top:0;}
.article-content p{margin:0 0 20px;}
.article-content h2{font-size:26px;font-weight:800;margin:38px 0 16px;padding-left:14px;position:relative;}
.article-content h2::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:var(--r-pill);background:var(--blue);}
.article-content h3{font-size:20px;margin:30px 0 12px;padding-left:12px;border-left:4px solid #C9DBF8;}
.article-content h4{font-size:17px;margin:22px 0 10px;}
.article-content ul{margin:0 0 20px;}
.article-content ul li{position:relative;padding-left:20px;margin-bottom:10px;}
.article-content ul li::before{content:"";position:absolute;left:2px;top:12px;width:7px;height:7px;border-radius:50%;background:var(--blue);opacity:.55;}
.article-content ol{margin:0 0 20px;counter-reset:artli;}
.article-content ol li{position:relative;padding-left:36px;margin-bottom:10px;counter-increment:artli;}
.article-content ol li::before{content:counter(artli);position:absolute;left:0;top:5px;width:23px;height:23px;border-radius:7px;background:var(--blue-light);color:var(--blue-dark);font-size:12px;font-weight:700;display:grid;place-items:center;line-height:1;}
.article-content blockquote{margin:24px 0;padding:18px 22px;background:var(--blue-ultra);border-left:4px solid var(--orange);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--text-2);font-size:15.5px;}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content img{border-radius:var(--r-md);margin:24px auto;box-shadow:var(--sh-1);}
.article-content figure{margin:24px 0;}
.article-content figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;}
.article-content table{width:100%;margin:24px 0;font-size:15px;border:1px solid var(--border);border-radius:var(--r-md);overflow:hidden;}
.article-content th{background:var(--blue-light);color:var(--blue-dark);font-weight:700;text-align:left;padding:12px 14px;border-bottom:1px solid var(--border);}
.article-content td{padding:12px 14px;border-bottom:1px solid var(--line);color:var(--text-2);}
.article-content tbody tr:nth-child(even){background:#FAFCFF;}
.article-content a{color:var(--blue);font-weight:600;border-bottom:1px solid rgba(31,95,214,.32);}
.article-content a:hover{color:var(--orange);border-bottom-color:var(--orange);}
.article-content code{background:#F1F5FD;color:var(--blue-dark);padding:2px 7px;border-radius:6px;font-size:14px;font-family:ui-monospace,Menlo,Consolas,monospace;}
.article-content pre{background:#0E1A2B;color:#DCE6F7;padding:18px 20px;border-radius:var(--r-md);overflow:auto;font-size:14px;line-height:1.7;margin:24px 0;}
.article-content pre code{background:none;color:inherit;padding:0;}
.article-content hr{border:0;border-top:1px solid var(--line);margin:34px 0;}

/* 空态 */
.empty-state{max-width:var(--reading);margin:0 auto;text-align:center;padding:64px 24px;border:1px dashed #D5E0F2;border-radius:var(--r-lg);background:var(--blue-ultra);min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;}
.empty-state i{font-size:36px;color:#C3CEDF;}
.empty-state h2{font-size:22px;margin:16px 0 8px;}
.empty-state p{color:var(--text-2);margin-bottom:22px;font-size:15px;}

/* 标签行 */
.tag-row{max-width:var(--reading);margin:38px auto 0;padding-top:24px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tag-label{font-size:13px;color:var(--text-3);margin-right:4px;}
.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--r-pill);background:var(--blue-ultra);border:1px solid var(--border);color:var(--text-2);font-size:13px;font-weight:600;}
.tag:hover{background:var(--blue-light);color:var(--blue);border-color:#C9DBF8;}

/* 相关推荐 */
.related{max-width:var(--reading);margin:44px auto 0;}
.related-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;}
.related-head h2{font-size:20px;font-weight:800;display:flex;align-items:center;gap:9px;}
.related-head h2 i{color:var(--blue);font-size:16px;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.post-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;height:100%;transition:transform var(--t),box-shadow var(--t),border-color var(--t);}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D8E3F5;}
.post-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--blue-ultra);}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.post-card:hover .thumb img{transform:scale(1.04);}
.post-card .thumb .badge{position:absolute;left:10px;top:10px;}
.post-card .body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1;}
.post-card h3{font-size:16px;font-weight:700;line-height:1.5;color:var(--text);transition:color var(--t);}
.post-card:hover h3{color:var(--blue);}
.post-card .excerpt{font-size:13.5px;color:var(--text-2);line-height:1.7;}
.post-card .foot{margin-top:auto;padding-top:10px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12.5px;color:var(--text-3);}
.post-card .foot .more{display:inline-flex;align-items:center;gap:5px;font-weight:700;color:var(--blue);}
.post-card:hover .foot .more{color:var(--orange);}

/* 文末操作 + 淡化 CTA */
.article-foot{max-width:var(--reading);margin:36px auto 0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;}
.cta-strip{max-width:var(--reading);margin:30px auto 0;background:var(--blue-ultra);border:1px solid var(--border);border-radius:var(--r-lg);padding:22px 26px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;}
.cta-strip strong{display:block;font-size:16.5px;color:var(--text);margin-bottom:4px;font-weight:800;}
.cta-strip p{font-size:14px;color:var(--text-2);max-width:520px;}

/* 侧栏 */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px;min-width:0;}
.side-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:22px 22px 20px;transition:box-shadow var(--t),border-color var(--t);}
.side-card:hover{box-shadow:var(--sh-2);border-color:#D8E3F5;}
.side-card h3{font-size:16px;font-weight:800;display:flex;align-items:center;gap:9px;margin-bottom:14px;}
.side-card h3 i{color:var(--blue);font-size:15px;}
.side-meta{font-size:13.5px;color:var(--text-2);line-height:2.1;}
.side-meta b{color:var(--text);font-weight:700;display:inline-block;min-width:56px;color:var(--text-3);font-weight:600;}
.side-list li + li{border-top:1px solid var(--line);}
.side-list a{display:flex;gap:12px;align-items:flex-start;padding:12px 0;font-size:14.5px;font-weight:600;color:var(--text-2);line-height:1.6;}
.side-list a:hover{color:var(--blue);}
.side-num{width:22px;height:22px;flex:0 0 auto;margin-top:2px;border-radius:7px;background:var(--blue-ultra);color:var(--blue);font-size:12px;font-weight:700;display:grid;place-items:center;line-height:1;}
.side-num.top{background:var(--orange);color:#fff;}
.side-note{font-size:13px;color:var(--text-3);margin-bottom:14px;line-height:1.75;}

/* ============ 页脚 CTA 带 ============ */
.footer-cta{background:var(--blue);color:#fff;padding:56px 0;position:relative;overflow:hidden;}
.footer-cta::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);background-size:24px 24px;opacity:.55;pointer-events:none;}
.footer-cta .inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;}
.footer-cta h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;}
.footer-cta p{color:rgba(255,255,255,.88);font-size:15px;max-width:640px;line-height:1.8;}
.footer-cta .btn-primary{box-shadow:0 10px 24px rgba(232,90,30,.30);}

/* ============ 页脚 ============ */
.site-footer{background:#0E1A2B;color:#B7C4D8;padding:56px 0 24px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.9fr 1fr 1fr 1.2fr;gap:32px;}
.footer-brand .footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-logo .logo-mark{background:var(--orange);box-shadow:none;}
.footer-logo .logo-text b{color:#fff;}
.footer-logo .logo-text i{color:#8FA3BF;}
.footer-brand p{color:#93A3BC;font-size:13.5px;line-height:1.85;max-width:380px;}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{color:#93A3BC;font-size:13.5px;}
.footer-col a:hover{color:var(--orange);}
.footer-col > ul > li{color:#93A3BC;font-size:13.5px;}
.footer-bottom{margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;font-size:12.5px;color:#7E8FA9;}
.footer-links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-links a{color:#93A3BC;font-size:12.5px;}

/* ============ 阅读进度 / 返回顶部 ============ */
.read-progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--blue);z-index:90;transition:width .12s linear;}
.read-progress::after{content:"";display:block;height:100%;background:var(--orange);width:28%;}
.to-top{position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:var(--r-pill);background:#fff;border:1px solid var(--border);color:var(--blue);box-shadow:var(--sh-2);display:none;place-items:center;z-index:70;font-size:15px;transition:background-color var(--t),color var(--t),transform var(--t);}
.to-top.show{display:grid;}
.to-top:hover{background:var(--blue-light);color:var(--blue-dark);transform:translateY(-2px);}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr);}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap;}
  .article-side .side-card{flex:1 1 280px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:900px){
  .nav-cards{display:none;}
  .nav-toggle{display:grid;}
  .nav-drawer{display:block;position:fixed;inset:0;background:rgba(14,26,43,.45);z-index:95;opacity:0;pointer-events:none;transition:opacity var(--t);}
  .nav-drawer.is-open{opacity:1;pointer-events:auto;}
  .nav-drawer-panel{position:absolute;top:0;right:0;bottom:0;width:min(320px,86vw);background:#fff;padding:22px 20px 28px;box-shadow:var(--sh-3);transform:translateX(100%);transition:transform var(--t);overflow-y:auto;}
  .nav-drawer.is-open .nav-drawer-panel{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
  .drawer-title{font-size:16px;font-weight:800;}
  .drawer-close{width:40px;height:40px;border-radius:11px;border:1px solid var(--border);color:var(--text-2);display:grid;place-items:center;}
  .drawer-close:hover{background:var(--blue-ultra);color:var(--blue);}
  .drawer-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:22px;}
  .drawer-nav a{padding:12px 14px;border-radius:12px;font-size:15px;font-weight:600;color:var(--text-2);background:var(--blue-ultra);border:1px solid transparent;}
  .drawer-nav a:hover,.drawer-nav a.active{background:var(--blue-light);color:var(--blue-dark);border-color:#D8E3F5;box-shadow:inset 3px 0 0 var(--orange);}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .topbar-inner{font-size:12.5px;gap:10px;}
  .topbar-inner p span.long{display:none;}
  .article-hero-inner{padding:26px 20px 24px;}
  .article-main{padding:24px 20px 28px;}
  .article-content{font-size:16px;}
  .article-content h2{font-size:22px;}
  .article-content h3{font-size:18px;}
  .article-section{padding:26px 0 56px;}
  .related-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .footer-cta{padding:44px 0;}
  .crumbs .current{max-width:220px;}
  .cta-strip{padding:20px;}
  .to-top{right:16px;bottom:18px;}
}
@media (max-width:560px){
  .header-actions .btn-primary{display:none;}
  .logo-text b{font-size:15.5px;}
  .logo-text i{font-size:10.5px;letter-spacing:2.6px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .article-foot .btn{width:100%;}
  .article-side{flex-direction:column;}
}

/* roulang page: category2 */
:root{
  --brand:#1F5FD6;
  --brand-dark:#16459F;
  --brand-soft:#EAF1FD;
  --brand-tint:#F5F8FE;
  --accent:#FF6A2B;
  --accent-dark:#E85A1E;
  --teal:#0EA5A0;
  --bg:#F7F9FC;
  --surface:#FFFFFF;
  --ink:#0E1A2B;
  --text:#0E1A2B;
  --text-2:#5B6B84;
  --text-3:#8A98AC;
  --border:#E4EAF3;
  --line:#EEF2F8;
  --r-hero:20px;
  --r-card:16px;
  --r-sm:12px;
  --r-pill:999px;
  --sh-1:0 2px 10px rgba(15,27,45,.05);
  --sh-2:0 10px 28px rgba(15,27,45,.10);
  --sh-3:0 24px 60px rgba(15,27,45,.18);
  --sp-1:8px;
  --sp-2:12px;
  --sp-3:16px;
  --sp-4:24px;
  --sp-5:32px;
  --sp-6:48px;
  --sp-7:72px;
  --sp-8:96px;
  --t:240ms;
  --t-fast:200ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color var(--t) ease}
a:hover{color:var(--accent)}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4,h5{margin:0;font-weight:800;line-height:1.3;color:var(--text);letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
input,select,textarea{font:inherit;color:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tint{background:var(--surface)}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,3vw,32px)}
.section-head p{margin-top:10px;color:var(--text-2);font-size:16px;max-width:640px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand);background:var(--brand-soft);border-radius:var(--r-pill);padding:5px 14px;margin-bottom:16px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 18px;border-radius:0 0 12px 0;z-index:200}
.skip-link:focus{left:0;color:#fff}
:focus-visible{outline:3px solid rgba(31,95,214,.35);outline-offset:2px;border-radius:6px}

/* ---------- 头部与卡片化导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;padding:16px 0;transition:padding var(--t) ease,background var(--t) ease,box-shadow var(--t) ease}
.site-header.is-stuck{padding:8px 0;background:var(--surface);box-shadow:var(--sh-2)}
.nav-shell{
  display:flex;align-items:center;gap:18px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  padding:14px 18px;
  transition:padding var(--t) ease,box-shadow var(--t) ease;
}
.site-header.is-stuck .nav-shell{padding:8px 14px;box-shadow:var(--sh-2)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:40px;height:40px;border-radius:12px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:17px;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:16px;font-weight:800;color:var(--text)}
.brand-text i{font-style:normal;font-size:12px;color:var(--text-3);letter-spacing:.04em}
.site-header.is-stuck .brand-mark{width:34px;height:34px;font-size:15px}
.nav-cards{display:flex;gap:8px;flex:1 1 auto;justify-content:center;flex-wrap:wrap}
.nav-card{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;border-radius:var(--r-sm);
  color:var(--text-2);font-size:14px;font-weight:600;
  transition:background var(--t) ease,color var(--t) ease;
}
.nav-card i{color:var(--text-3);transition:color var(--t) ease;font-size:13px}
.nav-card:hover{background:var(--brand-tint);color:var(--brand)}
.nav-card:hover i{color:var(--brand)}
.nav-card.active{background:var(--brand-soft);color:var(--brand)}
.nav-card.active i{color:var(--brand)}
.nav-card.active::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:18px;border-radius:2px;background:var(--accent)}
.nav-cta{flex:0 0 auto}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--surface);color:var(--text);font-size:16px}
.nav-toggle:hover{background:var(--brand-tint);color:var(--brand)}
.mobile-drawer{position:fixed;inset:0;z-index:120;background:rgba(14,26,43,.45);opacity:0;visibility:hidden;transition:opacity var(--t) ease,visibility var(--t) ease}
.mobile-drawer.open{opacity:1;visibility:visible}
.drawer-panel{position:absolute;right:0;top:0;bottom:0;width:min(88vw,340px);background:var(--surface);padding:24px;box-shadow:var(--sh-3);border-radius:16px 0 0 16px;transform:translateX(100%);transition:transform .28s ease;overflow:auto}
.mobile-drawer.open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.drawer-head b{font-size:16px}
.drawer-close{width:40px;height:40px;border:1px solid var(--border);background:var(--surface);border-radius:var(--r-sm);color:var(--text-2)}
.drawer-close:hover{background:var(--brand-tint);color:var(--brand)}
.drawer-list{display:grid;gap:10px;margin-bottom:22px}
.drawer-list a{display:flex;align-items:center;gap:10px;padding:13px 16px;border:1px solid var(--border);border-radius:var(--r-sm);color:var(--text-2);font-weight:600;font-size:15px}
.drawer-list a.active{background:var(--brand-soft);color:var(--brand);border-color:#D3E2FA}
.drawer-list a:hover{background:var(--brand-tint);color:var(--brand)}

/* ---------- 按钮与文字链 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-sm);font-size:15px;font-weight:700;border:1px solid transparent;transition:background var(--t) ease,color var(--t) ease,transform var(--t) ease,box-shadow var(--t) ease,border-color var(--t) ease}
.btn i{font-size:14px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-outline{background:var(--surface);border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-dark)}
.btn-outline:active{transform:translateY(1px)}
.btn-light{background:#fff;color:var(--brand);border-color:#fff}
.btn-light:hover{background:var(--brand-soft);color:var(--brand-dark);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.link-arrow{display:inline-flex;align-items:center;font-size:14px;font-weight:700;color:var(--brand)}
.link-arrow i{margin-left:6px;font-size:12px;transition:transform var(--t) ease}
.link-arrow:hover{color:var(--accent)}
.link-arrow:hover i{transform:translateX(2px)}
.badge{display:inline-block;font-size:11px;font-weight:700;padding:4px 11px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand);letter-spacing:.02em}
.badge-teal{background:rgba(14,165,160,.12);color:#0B7F7B}
.badge-solid{background:var(--accent);color:#fff}

/* ---------- 面包屑与分类页 Hero ---------- */
.crumbs{font-size:13px;color:var(--text-3);margin-bottom:20px}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{margin:0 8px;color:#B9C5D6}
.crumbs .current{color:var(--text-2);font-weight:600}
.page-hero{position:relative;overflow:hidden;background:var(--brand-soft);padding:52px 0 64px}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(31,95,214,.05) 0 1px,transparent 1px 16px);
  pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;right:-220px;top:-300px;width:660px;height:660px;border-radius:50%;
  border:1px solid rgba(31,95,214,.09);box-shadow:inset 0 0 0 40px rgba(31,95,214,.02);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.hero-split{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.page-hero h1{font-size:clamp(28px,4vw,44px);line-height:1.25;max-width:660px;margin-bottom:18px}
.page-hero h1 em{font-style:normal;color:var(--brand)}
.hero-lead{font-size:17px;line-height:1.85;color:var(--text-2);max-width:640px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-media{border-radius:var(--r-hero);overflow:hidden;border:1px solid rgba(31,95,214,.14);box-shadow:var(--sh-2);background:var(--surface)}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-points{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.hero-point{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.8);border:1px solid rgba(31,95,214,.14);border-radius:var(--r-pill);padding:7px 15px;font-size:13px;font-weight:600;color:var(--text-2)}
.hero-point i{color:var(--teal);font-size:12px}

/* ---------- 图文双栏 ---------- */
.grid-split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.grid-split.reverse .split-media{order:2}
.media-frame{border-radius:var(--r-hero);overflow:hidden;border:1px solid var(--border);box-shadow:var(--sh-2);background:var(--surface)}
.media-frame img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split-text h2{font-size:clamp(23px,2.8vw,30px);margin-bottom:16px}
.split-text p{color:var(--text-2);font-size:16px;line-height:1.85;margin-bottom:22px}
.point-list{display:grid;gap:12px;margin-bottom:26px}
.point-list li{position:relative;padding-left:18px;font-size:15px;color:var(--text-2)}
.point-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.point-list li b{color:var(--text);font-weight:700}

/* ---------- 流程横排条 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.flow-step{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:26px 24px;transition:transform var(--t) ease,box-shadow var(--t) ease,border-color var(--t) ease}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D8E3F5}
.flow-num{width:38px;height:38px;border-radius:50%;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-weight:800;font-size:15px;font-variant-numeric:tabular-nums;margin-bottom:16px}
.flow-step h3{font-size:18px;margin-bottom:10px}
.flow-step p{font-size:14px;color:var(--text-2);line-height:1.75}
.flow-step::after{content:"";position:absolute;right:-12px;top:46px;width:12px;height:1px;background:#D8E3F5}
.flow-step:last-child::after{display:none}

/* ---------- 数据条 ---------- */
.data-card{background:var(--ink);border-radius:var(--r-hero);padding:44px 44px 32px;box-shadow:var(--sh-2)}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.data-item b{display:block;font-size:clamp(34px,4.4vw,50px);line-height:1.1;color:#fff;font-variant-numeric:tabular-nums;font-weight:800}
.data-item b em{font-style:normal;font-size:20px;color:var(--accent);margin-left:4px;font-weight:700}
.data-item span{display:block;margin-top:10px;font-size:14px;color:rgba(255,255,255,.68)}
.data-note{grid-column:1/-1;margin-top:26px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:rgba(255,255,255,.52);line-height:1.7}

/* ---------- 内链卡组 ---------- */
.link-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.link-card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:26px 24px;transition:transform var(--t) ease,box-shadow var(--t) ease,border-color var(--t) ease}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D8E3F5}
.link-card .card-icon{width:44px;height:44px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:17px;transition:background var(--t) ease,color var(--t) ease}
.link-card:hover .card-icon{background:var(--brand);color:#fff}
.link-card h3{font-size:18px;margin:16px 0 8px;color:var(--text)}
.link-card:hover h3{color:var(--brand)}
.link-card p{font-size:14px;color:var(--text-2);line-height:1.75}
.link-card .link-arrow{margin-top:14px}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:880px}
.faq-item{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;transition:border-color var(--t) ease,box-shadow var(--t) ease}
.faq-item.open{border-color:#D8E3F5;box-shadow:var(--sh-2)}
.faq-q{position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;background:none;border:0;text-align:left;font-size:16px;font-weight:700;color:var(--text)}
.faq-q:focus-visible{outline-offset:-3px}
.faq-item.open .faq-q::before{content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:2px;background:var(--accent)}
.faq-icon{width:26px;height:26px;flex:0 0 auto;border-radius:50%;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:13px;transition:transform var(--t-fast) ease,background var(--t-fast) ease,color var(--t-fast) ease}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--t-fast) ease}
.faq-a p{padding:0 24px 22px 24px;font-size:15px;color:var(--text-2);line-height:1.85}

/* ---------- 底部 CTA 带与内链组 ---------- */
.cta-band{background:var(--brand);border-radius:var(--r-hero);padding:48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;box-shadow:var(--sh-2)}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.82);font-size:15px;max-width:620px}
.inline-links{display:flex;gap:22px;flex-wrap:wrap;margin-top:26px;font-size:14px}
.inline-links a{color:var(--text-2);font-weight:600}
.inline-links a:hover{color:var(--brand)}
.inline-links .sep{color:#C7D2E2}

/* ---------- 悬浮按钮 ---------- */
.float-btn{position:fixed;right:28px;bottom:28px;z-index:70;display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 24px;border-radius:var(--r-pill);background:var(--accent);color:#fff;font-weight:700;font-size:15px;box-shadow:var(--sh-2);transition:background var(--t) ease,transform var(--t) ease,box-shadow var(--t) ease}
.float-btn:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:66px 0 40px}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.logo-mark{width:40px;height:40px;border-radius:12px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:17px;flex:0 0 auto}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text b{font-size:16px;font-weight:800;color:#fff}
.logo-text i{font-style:normal;font-size:12px;color:rgba(255,255,255,.55);letter-spacing:.04em}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:360px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:700}
.footer-col ul{display:grid;gap:11px}
.footer-col li{font-size:14px;color:rgba(255,255,255,.62)}
.footer-col a{font-size:14px;color:rgba(255,255,255,.62)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0 34px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5)}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{font-size:13px;color:rgba(255,255,255,.55)}
.footer-links a:hover{color:var(--accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .container{padding:0 22px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .hero-split{grid-template-columns:1fr;gap:36px}
  .hero-media img{aspect-ratio:16/9}
  .grid-split{gap:36px}
  .flow{grid-template-columns:repeat(2,1fr)}
  .flow-step::after{display:none}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .link-cards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .nav-cards,.nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .nav-shell{justify-content:space-between}
  .grid-split,.grid-split.reverse{grid-template-columns:1fr}
  .grid-split.reverse .split-media{order:0}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .page-hero{padding:36px 0 48px}
  .hero-lead{font-size:16px}
  .hero-actions{gap:12px}
  .hero-actions .btn{flex:1 1 auto}
  .data-card{padding:32px 24px 26px}
  .cta-band{padding:32px 24px}
  .cta-band .btn{width:100%}
  .float-btn{left:0;right:0;bottom:0;width:100%;height:54px;border-radius:16px 16px 0 0;justify-content:center;transform:none}
  .float-btn:hover{transform:none}
  body{padding-bottom:54px}
  .site-footer{margin-top:64px}
  .footer-grid{padding:48px 0 32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .flow{grid-template-columns:1fr}
  .link-cards{grid-template-columns:1fr}
  .data-grid{grid-template-columns:1fr 1fr;gap:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .brand-text i{font-size:11px}
  .faq-q{font-size:15px;padding:18px 18px}
  .faq-a p{padding:0 18px 20px 18px;font-size:14px}
}