/* roulang page: index */
:root{
  --c-primary:#1F5FA8;
  --c-primary-dark:#164A85;
  --c-primary-light:#EAF2FB;
  --c-accent:#D97434;
  --c-accent-dark:#BF6128;
  --c-bg:#F5F7FA;
  --c-card:#FFFFFF;
  --c-line:#E3E8EF;
  --c-line-soft:#EDF1F6;
  --c-deep:#14202E;
  --t-main:#1B2330;
  --t-sub:#5A6675;
  --t-weak:#8B95A3;
  --t-invert:#FFFFFF;
  --c-ok:#1F9D6B;
  --c-warn:#C08A20;
  --c-err:#C9423A;
  --c-disabled:#C3CBD6;
  --c-disabled-bg:#F0F3F7;
  --r-card:16px;
  --r-sm:10px;
  --r-pill:999px;
  --r-img:12px;
  --sh-sm:0 1px 2px rgba(27,35,48,.06);
  --sh-md:0 8px 24px rgba(31,95,168,.08);
  --sh-lg:0 16px 40px rgba(31,95,168,.12);
  --container:1200px;
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--t-main);
  background:var(--c-bg);
  padding-top:104px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-accent);}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- 悬浮胶囊导航 ---------- */
.site-nav{position:fixed;top:16px;left:0;right:0;z-index:120;display:flex;justify-content:center;padding:0 16px;}
.nav-inner{
  position:relative;width:min(1160px,100%);height:64px;
  display:flex;align-items:center;gap:18px;padding:0 12px 0 20px;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.7);border-radius:var(--r-pill);
  box-shadow:var(--sh-lg);
  transition:background .22s ease,box-shadow .22s ease;
}
.site-nav.is-scrolled .nav-inner{background:rgba(255,255,255,.96);box-shadow:0 18px 42px rgba(31,95,168,.18);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--t-main);}
.brand:hover{color:var(--t-main);}
.brand-mark{position:relative;width:28px;height:28px;border-radius:9px;background:var(--c-primary);flex:0 0 auto;overflow:hidden;}
.brand-mark::before{content:"";position:absolute;left:6px;top:6px;width:7px;height:16px;background:var(--c-primary-light);border-radius:2px;transform:skewX(-14deg);}
.brand-mark::after{content:"";position:absolute;right:5px;top:5px;width:7px;height:18px;background:var(--c-accent);border-radius:2px;transform:skewX(-14deg);}
.brand-text{font-size:15px;font-weight:700;letter-spacing:.2px;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:4px;margin:0 auto;}
.nav-link{position:relative;display:inline-block;font-size:15px;color:var(--t-sub);padding:9px 12px;border-radius:var(--r-pill);transition:color .18s ease,background .18s ease;}
.nav-link::after{content:"";position:absolute;left:22%;right:22%;bottom:3px;height:2px;background:var(--c-primary);transform:scaleX(0);transform-origin:center;transition:transform .18s ease;border-radius:2px;}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-primary);background:rgba(31,95,168,.08);font-weight:600;}
.nav-link.is-active::after{display:none;}
.nav-right{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto;}
.nav-cta-mobile{display:none;}
.nav-toggle{display:none;width:44px;height:44px;border-radius:50%;align-items:center;justify-content:center;flex-direction:column;gap:5px;background:rgba(31,95,168,.08);}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-primary);transition:transform .22s ease,opacity .22s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .18s ease,background .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 6px 18px rgba(217,116,52,.24);}
.btn-accent:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(217,116,52,.3);}
.btn-accent:active{transform:translateY(1px);}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--c-primary);border:1px solid var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-light);color:var(--c-primary-dark);transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn:disabled,.btn.is-disabled{background:var(--c-disabled-bg);color:var(--c-disabled);border-color:var(--c-disabled-bg);box-shadow:none;cursor:not-allowed;transform:none;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);}
.link-more i{transition:transform .2s ease;}
.link-more:hover i{transform:translateX(3px);}

/* ---------- 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);font-size:13px;font-weight:600;background:var(--c-primary-light);color:var(--c-primary);}
.badge-accent{background:rgba(217,116,52,.12);color:var(--c-accent-dark);}
.badge-dark{background:rgba(255,255,255,.14);color:#fff;}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-white{background:#fff;}
.section-tint{background:var(--c-bg);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head.center{margin:0 auto 48px;text-align:center;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-primary);letter-spacing:1px;text-transform:uppercase;margin-bottom:14px;}
.eyebrow::before{content:"";width:18px;height:3px;border-radius:2px;background:var(--c-accent);}
h1,h2,h3,h4{line-height:1.35;}
h2{font-size:28px;font-weight:700;}
.section-head p{margin-top:14px;color:var(--t-sub);font-size:16px;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head-row h2{font-size:28px;font-weight:700;}
.section-head-row p{margin-top:10px;color:var(--t-sub);}

/* ---------- Hero ---------- */
.hero{position:relative;padding:64px 0 88px;background:linear-gradient(180deg,#FFFFFF 0%,#F1F6FC 62%,var(--c-bg) 100%);overflow:hidden;}
.hero::before{content:"";position:absolute;top:-120px;right:-140px;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(31,95,168,.14),rgba(31,95,168,0) 68%);}
.hero-grid{position:relative;display:grid;grid-template-columns:1.45fr 1fr;gap:56px;align-items:center;}
.hero h1{font-size:clamp(30px,4vw,44px);font-weight:700;line-height:1.22;margin:18px 0 18px;}
.hero-sub{font-size:17px;color:var(--t-sub);max-width:560px;line-height:1.8;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 28px;}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;}
.trust-row li{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:var(--r-pill);background:#fff;border:1px solid var(--c-line);font-size:13px;color:var(--t-sub);box-shadow:var(--sh-sm);}
.trust-row i{color:var(--c-primary);font-size:13px;}
.hero-visual{position:relative;}
.hero-visual img{border-radius:var(--r-card);box-shadow:var(--sh-lg);width:100%;height:360px;object-fit:cover;}
.hero-visual::after{content:"";position:absolute;left:-22px;bottom:-22px;width:120px;height:120px;border-radius:24px;background:repeating-linear-gradient(45deg,rgba(31,95,168,.12) 0 2px,transparent 2px 8px);z-index:-1;}
.hero-chip{position:absolute;left:-18px;top:26px;background:#fff;border-radius:14px;box-shadow:var(--sh-md);padding:14px 18px;border:1px solid var(--c-line);}
.hero-chip strong{display:block;font-family:var(--font-num);font-size:22px;color:var(--c-primary);line-height:1.1;}
.hero-chip span{font-size:12px;color:var(--t-weak);}
.hero-geo{position:absolute;right:8px;bottom:-26px;width:96px;height:96px;border-radius:20px;background:rgba(217,116,52,.12);z-index:-1;}

/* ---------- 痛点提问卡 ---------- */
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.pain-card{position:relative;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px 24px 26px 28px;box-shadow:var(--sh-sm);transition:box-shadow .22s ease,transform .22s ease;}
.pain-card::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:3px;background:var(--c-primary);transition:background .22s ease;}
.pain-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.pain-card:hover::before{background:var(--c-accent);}
.pain-icon{width:40px;height:40px;border-radius:12px;background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:17px;margin-bottom:16px;}
.pain-card h3{font-size:17px;font-weight:600;margin-bottom:10px;line-height:1.5;}
.pain-card p{font-size:14px;color:var(--t-sub);line-height:1.7;}

/* ---------- 方案区（非对称） ---------- */
.solution-grid{display:grid;grid-template-columns:1.35fr 1fr;grid-template-rows:auto auto;gap:24px;}
.sol-main{grid-row:span 2;background:var(--c-deep);color:#fff;border-radius:var(--r-card);padding:32px;box-shadow:var(--sh-md);display:flex;flex-direction:column;gap:22px;position:relative;overflow:hidden;}
.sol-main::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(217,116,52,.28),rgba(217,116,52,0) 70%);}
.sol-main img{border-radius:var(--r-img);height:220px;width:100%;object-fit:cover;}
.sol-main h3{font-size:22px;font-weight:700;color:#fff;}
.sol-main p{color:rgba(255,255,255,.76);font-size:15px;line-height:1.8;}
.sol-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:4px;}
.sol-metric{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:14px 12px;text-align:center;}
.sol-metric strong{display:block;font-family:var(--font-num);font-size:22px;color:#fff;}
.sol-metric span{font-size:12px;color:rgba(255,255,255,.65);}
.sol-main .link-more{color:#F0B486;}
.sol-main .link-more:hover{color:#fff;}
.sol-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-sm);transition:box-shadow .22s ease,transform .22s ease;display:flex;flex-direction:column;gap:12px;}
.sol-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.sol-card.offset{transform:translateY(24px);}
.sol-card.offset:hover{transform:translateY(22px);}
.sol-card .pain-icon{margin-bottom:2px;}
.sol-card h3{font-size:19px;font-weight:600;}
.sol-card p{font-size:14px;color:var(--t-sub);line-height:1.75;}

/* ---------- 数据区 ---------- */
.stats-band{background:var(--c-primary-light);border-radius:20px;padding:48px 32px;}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;}
.stat-num{display:block;font-family:var(--font-num);font-size:clamp(32px,4vw,40px);font-weight:700;color:var(--c-primary);line-height:1;}
.stat-num small{font-size:16px;margin-left:4px;font-weight:600;}
.stat-label{display:block;margin-top:12px;font-size:14px;color:var(--t-sub);}
.stats-note{margin-top:32px;text-align:center;font-size:14px;color:var(--t-weak);}

/* ---------- 最新信息列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);transition:box-shadow .22s ease,transform .22s ease;display:flex;flex-direction:column;}
.post-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.post-cover{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--c-line-soft);}
.post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.post-card:hover .post-cover img{transform:scale(1.03);}
.post-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.post-title{font-size:18px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-title a{color:var(--t-main);}
.post-title a:hover{color:var(--c-primary);}
.post-sum{font-size:14px;color:var(--t-sub);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:12px;border-top:1px solid var(--c-line-soft);font-size:13px;color:var(--t-weak);}
.empty-state{grid-column:1/-1;background:#fff;border:1px dashed var(--c-line);border-radius:var(--r-card);padding:56px 24px;text-align:center;color:var(--t-weak);}
.empty-state i{font-size:28px;color:var(--c-disabled);}
.empty-state p{margin-top:14px;font-size:15px;}
.empty-state a{display:inline-block;margin-top:10px;font-size:14px;font-weight:600;}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:12px;box-shadow:var(--sh-sm);overflow:hidden;transition:box-shadow .2s ease;}
.faq-item:hover{box-shadow:var(--sh-md);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;text-align:left;font-size:17px;font-weight:600;color:var(--t-main);}
.faq-q .faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:13px;transition:transform .22s ease,background .22s ease,color .22s ease;}
.faq-item.is-open .faq-icon{background:var(--c-accent);color:#fff;transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a-inner{padding:0 24px 22px;border-top:1px solid var(--c-line-soft);margin:0 24px;padding-left:0;padding-right:0;padding-top:16px;font-size:15px;line-height:1.85;color:var(--t-sub);}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--c-primary-light);border-radius:20px;padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:28px;}
.cta-title{font-size:24px;font-weight:700;}
.cta-sub{margin-top:10px;font-size:15px;color:var(--t-sub);max-width:620px;}
.cta-band .btn{flex:0 0 auto;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-deep);color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:3fr 2fr 2fr 3fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;color:#fff;font-weight:700;font-size:16px;}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;}
.footer-col li{margin-bottom:12px;font-size:14px;}
.footer-col a{color:rgba(255,255,255,.68);}
.footer-col a:hover{color:#fff;}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;line-height:1.7;}
.footer-contact i{color:var(--c-accent);margin-top:4px;}
.footer-bottom{margin-top:56px;border-top:1px solid rgba(255,255,255,.12);padding:22px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:rgba(255,255,255,.5);}
.footer-bottom a{color:rgba(255,255,255,.62);}
.footer-bottom a:hover{color:#fff;}

/* ---------- 弹层 ---------- */
.modal{position:fixed;inset:0;z-index:200;display:none;}
.modal.is-open{display:block;}
.modal-mask{position:absolute;inset:0;background:rgba(27,35,48,.5);backdrop-filter:blur(2px);}
.modal-panel{position:relative;width:480px;max-width:92vw;margin:8vh auto 0;background:#fff;border-radius:20px;padding:32px;box-shadow:0 30px 70px rgba(20,32,46,.3);animation:modalIn .24s ease;max-height:84vh;overflow:auto;}
@keyframes modalIn{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:translateY(0);}}
.modal-close{position:absolute;right:16px;top:16px;width:40px;height:40px;border-radius:50%;background:var(--c-disabled-bg);color:var(--t-sub);font-size:20px;line-height:1;display:flex;align-items:center;justify-content:center;transition:background .2s ease,color .2s ease;}
.modal-close:hover{background:#E2E8F1;color:var(--t-main);}
.modal-panel h3{font-size:21px;font-weight:700;}
.modal-sub{margin-top:8px;font-size:14px;color:var(--t-sub);}
.lead-form{margin-top:22px;display:grid;gap:8px;}
.lead-form label{font-size:13px;color:var(--t-weak);margin-top:8px;}
.lead-form input[type="text"],.lead-form textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  border:1px solid var(--c-line);background:#fff;transition:border-color .2s ease,box-shadow .2s ease;
}
.lead-form textarea{height:auto;padding:12px 14px;resize:vertical;line-height:1.7;}
.lead-form input[type="text"]:focus,.lead-form textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(31,95,168,.14);}
.lead-form input.is-error,.lead-form textarea.is-error{border-color:var(--c-err);box-shadow:0 0 0 3px rgba(201,66,58,.12);}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--t-weak);margin:10px 0 6px;line-height:1.6;}
.check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--c-primary);}
.form-tip{font-size:13px;color:var(--c-ok);margin-top:6px;}
.form-tip.error{color:var(--c-err);}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .container{padding:0 22px;}
  .nav-link{font-size:14px;padding:9px 10px;}
  .hero-grid{gap:40px;}
  .pain-grid{grid-template-columns:repeat(2,1fr);}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  h2,.section-head-row h2{font-size:25px;}
}
@media (max-width:991px){
  body{padding-top:92px;}
  .section{padding:64px 0;}
  .hero{padding:40px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual img{height:300px;}
  .hero-chip{left:12px;top:12px;}
  .solution-grid{grid-template-columns:1fr;}
  .sol-main{grid-row:auto;}
  .sol-card.offset{transform:none;}
  .sol-card.offset:hover{transform:translateY(-2px);}
  .stats{grid-template-columns:repeat(2,1fr);gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
}
@media (max-width:768px){
  .nav-inner{height:56px;padding:0 10px 0 14px;border-radius:20px;}
  .brand-text{font-size:14px;max-width:190px;overflow:hidden;text-overflow:ellipsis;}
  .nav-menu{
    position:absolute;left:0;right:0;top:66px;display:none;flex-direction:column;align-items:stretch;gap:2px;
    background:#fff;border-radius:20px;box-shadow:var(--sh-lg);padding:10px;margin:0;
  }
  .nav-menu.is-open{display:flex;}
  .nav-link{padding:14px 16px;border-radius:14px;font-size:15px;border-bottom:1px solid var(--c-line-soft);}
  .nav-link:last-of-type{border-bottom:none;}
  .nav-link::after{display:none;}
  .nav-link.is-active{background:rgba(31,95,168,.08);}
  .nav-cta-mobile{display:flex;margin-top:8px;}
  .nav-right .btn{display:none;}
  .nav-toggle{display:flex;}
  .section{padding:48px 0;}
  .hero h1{font-size:30px;}
  .hero-sub{font-size:16px;}
  .btn{height:46px;padding:0 22px;}
  .hero-actions .btn{flex:1 1 100%;}
  .section-head-row{flex-direction:column;align-items:flex-start;gap:14px;}
  .post-grid{grid-template-columns:1fr;}
  .pain-grid{grid-template-columns:1fr;}
  .sol-metrics{grid-template-columns:repeat(3,1fr);gap:8px;}
  .faq-q{font-size:16px;padding:18px;}
  .faq-a-inner{margin:0 18px;padding-left:0;padding-right:0;}
  .cta-band{padding:26px;border-radius:16px;}
  .cta-title{font-size:20px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
  .modal-panel{padding:26px 20px;margin-top:6vh;}
}
@media (max-width:480px){
  .container{padding:0 16px;}
  h2,.section-head-row h2{font-size:23px;}
  .hero h1{font-size:26px;}
  .stats-band{padding:32px 18px;}
  .post-body{padding:16px;}
  .sol-main,.sol-card{padding:20px;}
  .sol-metrics{grid-template-columns:1fr 1fr;}
  .btn{width:100%;}
  .link-more{width:auto;}
  .footer-bottom{font-size:12px;}
}

/* roulang page: article */
:root{
  --c-primary:#1F5FA8;
  --c-primary-dark:#164A85;
  --c-primary-soft:#EAF2FB;
  --c-accent:#D97434;
  --c-accent-dark:#C0642A;
  --c-bg:#F5F7FA;
  --c-card:#FFFFFF;
  --c-line:#E3E8EF;
  --c-line-soft:#EDF1F6;
  --c-text:#1B2330;
  --c-text-2:#5A6675;
  --c-text-3:#8B95A3;
  --c-white:#FFFFFF;
  --c-footer:#14202E;
  --c-success:#1F9D6B;
  --c-warn:#C08A20;
  --c-error:#C9423A;
  --r-card:16px;
  --r-sm:10px;
  --r-pill:999px;
  --shadow-sm:0 1px 2px rgba(27,35,48,.06);
  --shadow-md:0 8px 24px rgba(31,95,168,.08);
  --shadow-lg:0 16px 40px rgba(31,95,168,.12);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px;}
a{color:var(--c-primary);text-decoration:none;transition:color .22s ease;}
a:hover{color:var(--c-accent);}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input,textarea,select{font-family:inherit;font-size:15px;color:var(--c-text);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.2px;
  border:1px solid transparent;transition:all .22s ease;white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-accent{background:var(--c-accent);color:#fff;}
.btn-accent:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-accent:active{transform:translateY(1px);box-shadow:none;}
.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);}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600;font-size:15px;padding:6px 0;}
.btn-text i{transition:transform .22s ease;font-size:13px;}
.btn-text:hover{color:var(--c-accent);}
.btn-text:hover i{transform:translateX(3px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r-pill);}
.btn:disabled{background:#F0F3F7;color:#C3CBD6;border-color:#F0F3F7;cursor:not-allowed;transform:none;box-shadow:none;}

/* ============ 导航 ============ */
.site-nav{position:fixed;top:16px;left:0;right:0;z-index:120;}
.nav-inner{
  width:min(1160px,calc(100% - 32px));margin:0 auto;
  height:var(--nav-h);display:flex;align-items:center;gap:20px;
  padding:0 12px 0 22px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.82);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.7);
  box-shadow:var(--shadow-lg);
  transition:background .3s ease,box-shadow .3s ease;
}
.site-nav.is-scrolled .nav-inner{background:rgba(255,255,255,.95);box-shadow:0 18px 42px rgba(31,95,168,.16);}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:30px;height:30px;border-radius:9px;position:relative;flex-shrink:0;
  background:linear-gradient(140deg,var(--c-primary) 0%,var(--c-primary) 55%,var(--c-primary-soft) 55%,var(--c-primary-soft) 100%);
  box-shadow:inset 0 0 0 1px rgba(31,95,168,.18);
}
.brand-mark::before{content:"";position:absolute;left:7px;top:7px;width:14px;height:3px;border-radius:2px;background:#fff;transform:rotate(-38deg);}
.brand-mark::after{content:"";position:absolute;right:7px;bottom:7px;width:11px;height:3px;border-radius:2px;background:var(--c-accent);transform:rotate(-38deg);}
.brand-text{font-size:16px;font-weight:700;color:var(--c-text);letter-spacing:.2px;line-height:1.2;}
.nav-menu{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;font-size:15px;color:var(--c-text-2);padding:8px 2px;border-radius:var(--r-pill);
  transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;background:var(--c-primary);
  transform:translateX(-50%);transition:width .18s ease;border-radius:2px;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{color:var(--c-primary);background:rgba(31,95,168,.08);padding:8px 14px;font-weight:600;}
.nav-link.is-active::after{display:none;}
.nav-cta-mobile{display:none;}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:8px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;flex-direction:column;
  align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--c-text);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ 文章头部 ============ */
.article-hero{
  padding:140px 0 44px;
  background:linear-gradient(180deg,#EAF2FB 0%,#F5F7FA 100%);
  position:relative;overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;right:-80px;top:60px;width:320px;height:320px;border-radius:64px;
  background:
    repeating-linear-gradient(0deg,rgba(31,95,168,.07) 0 1px,transparent 1px 22px),
    repeating-linear-gradient(90deg,rgba(31,95,168,.07) 0 1px,transparent 1px 22px);
  transform:rotate(12deg);pointer-events:none;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--c-text-3);margin-bottom:22px;position:relative;z-index:1;}
.breadcrumb a{color:var(--c-text-3);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:#C3CBD6;}
.breadcrumb .current{color:var(--c-text-2);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-hero-inner{position:relative;z-index:1;max-width:860px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:4px 12px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary);font-size:13px;font-weight:600;line-height:1;
}
.article-hero h1{
  font-size:clamp(30px,4vw,44px);line-height:1.2;font-weight:700;margin:18px 0 20px;letter-spacing:-.3px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;font-size:13px;color:var(--c-text-3);}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}
.article-meta .divider{width:1px;height:12px;background:var(--c-line);padding:0;}
.article-meta i{color:var(--c-primary);font-size:12px;}

/* ============ 文章布局 ============ */
.article-section{padding:56px 0 24px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start;}
.article-main{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);padding:40px 44px;
}
.article-main.is-empty{padding:56px 44px;}
.article-content{font-size:17px;line-height:1.85;color:var(--c-text);}
.article-content p{margin:0 0 18px;}
.article-content h2{
  font-size:24px;line-height:1.4;font-weight:700;color:var(--c-text);
  margin:36px 0 18px;padding-left:14px;border-left:4px solid var(--c-primary);
}
.article-content h3{font-size:20px;font-weight:600;margin:28px 0 14px;}
.article-content h4{font-size:17px;font-weight:600;margin:22px 0 12px;}
.article-content blockquote{
  background:var(--c-primary-soft);border-left:3px solid var(--c-primary);
  border-radius:0 12px 12px 0;padding:20px;margin:24px 0;color:var(--c-text-2);font-size:16px;
}
.article-content ul,.article-content ol{margin:0 0 18px;padding-left:4px;}
.article-content li{position:relative;padding-left:22px;margin-bottom:10px;}
.article-content ul li::before{
  content:"";position:absolute;left:4px;top:11px;width:7px;height:7px;border-radius:2px;background:var(--c-primary);
}
.article-content ol{counter-reset:item;}
.article-content ol li{counter-increment:item;}
.article-content ol li::before{
  content:counter(item);position:absolute;left:0;top:2px;width:18px;height:18px;border-radius:5px;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;font-family:var(--font-num);
}
.article-content img{margin:24px auto;border-radius:12px;}
.article-content figure{margin:24px 0;}
.article-content figcaption{text-align:center;font-size:13px;color:var(--c-text-3);margin-top:10px;}
.article-content table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.article-content th{background:var(--c-primary-soft);color:var(--c-text);font-weight:600;text-align:left;}
.article-content th,.article-content td{padding:12px 14px;border-bottom:1px solid var(--c-line);}
.article-content a{border-bottom:1px solid var(--c-primary);}
.article-content a:hover{color:var(--c-accent);border-bottom-color:var(--c-accent);}
.article-content strong{font-weight:700;}

/* 文章标签与底部操作 */
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;padding-top:24px;border-top:1px solid var(--c-line-soft);}
.article-tags .tag{
  display:inline-flex;align-items:center;height:26px;padding:4px 12px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary);font-size:13px;font-weight:600;
}
.article-tags .tag:hover{background:var(--c-primary);color:#fff;}
.article-foot-nav{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-top:26px;padding-top:22px;border-top:1px solid var(--c-line-soft);
}

/* 未找到内容 */
.empty-state{text-align:center;padding:24px 0;}
.empty-state .empty-icon{
  width:64px;height:64px;border-radius:20px;background:var(--c-primary-soft);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto 18px;
}
.empty-state h2{font-size:22px;margin-bottom:12px;}
.empty-state p{color:var(--c-text-2);font-size:15px;margin-bottom:22px;}

/* ============ 侧栏 ============ */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);padding:22px;
}
.side-card h3{font-size:16px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3 i{color:var(--c-primary);font-size:14px;}
.toc-list li{margin-bottom:10px;}
.toc-list a{display:block;font-size:14px;color:var(--c-text-2);padding:6px 10px;border-radius:8px;border-left:2px solid transparent;}
.toc-list a:hover{background:var(--c-primary-soft);color:var(--c-primary);border-left-color:var(--c-primary);}
.side-cat-list li{margin-bottom:8px;}
.side-cat-list a{display:flex;align-items:center;justify-content:space-between;font-size:14px;color:var(--c-text-2);padding:9px 12px;border-radius:var(--r-sm);background:var(--c-bg);}
.side-cat-list a:hover{background:var(--c-primary-soft);color:var(--c-primary);}
.side-cat-list i{font-size:11px;color:var(--c-text-3);}
.side-contact{border-color:var(--c-primary);background:linear-gradient(180deg,#fff 0%,#F7FAFE 100%);}
.side-contact p{font-size:14px;color:var(--c-text-2);margin-bottom:16px;}
.side-contact .btn{width:100%;height:44px;font-size:14px;}

/* ============ 相关推荐 ============ */
.related-section{padding:64px 0 8px;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;}
.section-head h2{font-size:26px;font-weight:700;letter-spacing:-.2px;}
.section-head p{font-size:14px;color:var(--c-text-3);margin-top:8px;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);}
.post-cover{overflow:hidden;aspect-ratio:16/10;background:#EDF1F6;}
.post-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s ease;}
.post-card:hover .post-cover img{transform:scale(1.03);}
.post-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.post-body .badge{align-self:flex-start;}
.post-body h3{font-size:18px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body h3 a{color:var(--c-text);}
.post-body h3 a:hover{color:var(--c-primary);}
.post-body p{font-size:14px;color:var(--c-text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:13px;color:var(--c-text-3);}

/* ============ CTA 条 ============ */
.cta-band{padding:64px 0 88px;}
.cta-box{
  background:var(--c-primary-soft);border-radius:20px;padding:40px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-box h2{font-size:24px;font-weight:700;margin-bottom:10px;}
.cta-box p{font-size:15px;color:var(--c-text-2);max-width:620px;}
.cta-box .cta-actions{display:flex;gap:14px;flex-shrink:0;}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-footer);color:#C7D0DB;padding:72px 0 28px;margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:3fr 2fr 2fr 3fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:700;margin-bottom:16px;}
.footer-brand .brand-mark{background:linear-gradient(140deg,var(--c-primary) 0%,#2B74C4 55%,#22405F 55%,#22405F 100%);}
.footer-desc{font-size:14px;line-height:1.8;color:#93A2B4;max-width:340px;}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;}
.footer-col ul li{margin-bottom:12px;font-size:14px;}
.footer-col ul a{color:#93A2B4;}
.footer-col ul a:hover{color:#fff;}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;color:#93A2B4;line-height:1.7;}
.footer-contact i{color:var(--c-accent);margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:#7E8B9C;
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:14px;
  background:#fff;color:var(--c-primary);border:1px solid var(--c-line);box-shadow:var(--shadow-md);
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;
  transition:opacity .25s ease,transform .25s ease,visibility .25s;z-index:110;
}
.to-top.is-show{opacity:1;visibility:visible;}
.to-top:hover{transform:translateY(-2px);color:var(--c-accent);}

/* ============ 弹层表单 ============ */
.modal{position:fixed;inset:0;z-index:200;display:none;}
.modal.is-open{display:block;}
.modal-mask{position:absolute;inset:0;background:rgba(27,35,48,.5);}
.modal-panel{
  position:relative;width:480px;max-width:92vw;margin:8vh auto 0;background:#fff;border-radius:20px;
  padding:32px;box-shadow:var(--shadow-lg);animation:modalIn .24s ease;
}
@keyframes modalIn{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:translateY(0);}}
.modal-close{
  position:absolute;right:14px;top:14px;width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;color:var(--c-text-2);font-size:16px;
}
.modal-close:hover{background:var(--c-bg);color:var(--c-text);}
.modal-panel h3{font-size:21px;font-weight:700;margin-bottom:10px;}
.modal-panel>p{font-size:14px;color:var(--c-text-2);margin-bottom:22px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;color:var(--c-text-3);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);border:1px solid var(--c-line);
  background:#fff;transition:border-color .2s ease,box-shadow .2s ease;outline:none;
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field textarea:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(31,95,168,.15);}
.field.has-error input,.field.has-error textarea{border-color:var(--c-error);}
.field .err{display:none;font-size:13px;color:var(--c-error);margin-top:6px;}
.field.has-error .err{display:block;}
.privacy-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--c-text-3);margin-bottom:18px;line-height:1.6;}
.privacy-row input{width:16px;height:16px;margin-top:3px;accent-color:var(--c-primary);}
.modal-panel .btn{width:100%;}
.form-note{font-size:13px;color:var(--c-text-3);text-align:center;margin-top:14px;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .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;}
  .article-content{font-size:16.5px;}
}
@media (max-width:991px){
  .nav-menu{gap:18px;}
  .nav-link{font-size:14px;}
  .brand-text{font-size:15px;}
  .article-hero{padding-top:124px;}
  .article-main{padding:32px 30px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-box{flex-direction:column;align-items:flex-start;padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .nav-inner{height:56px;padding:0 10px 0 16px;}
  .nav-menu{
    position:fixed;top:84px;left:16px;right:16px;margin:0;display:none;
    flex-direction:column;align-items:stretch;gap:0;padding:8px;
    background:#fff;border-radius:20px;box-shadow:var(--shadow-lg);border:1px solid var(--c-line);
  }
  .nav-menu.is-open{display:flex;}
  .nav-link{padding:14px 14px;font-size:15px;border-bottom:1px solid var(--c-line-soft);border-radius:0;}
  .nav-link::after{display:none;}
  .nav-link.is-active{padding:14px;border-radius:10px;}
  .nav-cta-mobile{
    display:flex;justify-content:center;margin-top:8px;color:#fff;background:var(--c-accent);
    border-radius:10px;font-weight:600;border-bottom:none;
  }
  .nav-cta-mobile:hover{color:#fff;background:var(--c-accent-dark);}
  .nav-right .btn-accent{display:none;}
  .nav-toggle{display:flex;}
  .article-hero{padding:112px 0 34px;}
  .breadcrumb .current{max-width:200px;}
  .article-section{padding:36px 0 16px;}
  .article-main{padding:24px 20px;}
  .article-content{font-size:16px;line-height:1.8;}
  .article-content h2{font-size:21px;margin-top:30px;}
  .section-head h2{font-size:23px;}
  .card-grid{grid-template-columns:1fr;}
  .cta-band{padding:48px 0 64px;}
  .cta-box h2{font-size:21px;}
  .cta-box .btn{width:100%;}
  .cta-box .cta-actions{width:100%;flex-direction:column;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
  .to-top{right:16px;bottom:18px;}
}
@media (max-width:479px){
  .container{padding:0 16px;}
  .article-main{padding:20px 16px;}
  .article-foot-nav{flex-direction:column;align-items:stretch;}
  .btn{width:100%;}
  .article-foot-nav .btn-text{justify-content:center;}
}

/* roulang page: category1 */
:root{
  --c-primary:#1F5FA8;
  --c-primary-d:#164A85;
  --c-primary-l:#EAF2FB;
  --c-accent:#D97434;
  --c-bg:#F5F7FA;
  --c-card:#FFFFFF;
  --c-line:#E3E8EF;
  --c-line-soft:#EDF1F6;
  --t-1:#1B2330;
  --t-2:#5A6675;
  --t-3:#8B95A3;
  --t-inv:#FFFFFF;
  --c-ok:#1F9D6B;
  --c-warn:#C08A20;
  --c-err:#C9423A;
  --c-disabled:#C3CBD6;
  --c-disabled-bg:#F0F3F7;
  --dark:#14202E;
  --dark-2:#1C2B3C;
  --r-card:16px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(27,35,48,.06);
  --sh-md:0 8px 24px rgba(31,95,168,.08);
  --sh-lg:0 16px 40px rgba(31,95,168,.12);
  --ease:220ms ease;
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:Inter,"Segoe UI",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--t-1);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--c-accent);}
button{font-family:inherit;cursor:pointer;}
input,textarea{font-family:inherit;font-size:15px;color:var(--t-1);}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
h1{font-size:clamp(30px,4vw,44px);line-height:1.2;font-weight:700;}
h2{font-size:28px;line-height:1.3;font-weight:700;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
h4{font-size:17px;line-height:1.5;font-weight:600;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border:1px solid transparent;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:transform var(--ease),background var(--ease),box-shadow var(--ease),color var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--c-primary);color:var(--t-inv);box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--c-primary-d);color:var(--t-inv);transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--sh-sm);}
.btn-accent{background:var(--c-accent);color:var(--t-inv);box-shadow:0 6px 16px rgba(217,116,52,.28);}
.btn-accent:hover{background:#C4642A;color:var(--t-inv);transform:translateY(-1px);box-shadow:0 10px 24px rgba(217,116,52,.34);}
.btn-accent:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-l);color:var(--c-primary-d);}
.btn-text{display:inline-flex;align-items:center;gap:8px;color:var(--c-primary);font-weight:600;font-size:15px;background:none;border:none;padding:0;height:auto;}
.btn-text i{transition:transform var(--ease);}
.btn-text:hover i{transform:translateX(3px);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn[disabled],.btn:disabled{background:var(--c-disabled-bg);color:var(--c-disabled);border-color:var(--c-line);box-shadow:none;cursor:not-allowed;transform:none;}

/* ---------- 悬浮胶囊导航 ---------- */
.site-nav{
  position:fixed;top:16px;left:0;right:0;z-index:100;
  width:min(1160px,calc(100% - 32px));margin:0 auto;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.82);
  border:1px solid rgba(255,255,255,.7);
  box-shadow:var(--sh-lg);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background var(--ease),box-shadow var(--ease),border-radius var(--ease);
}
.site-nav.is-scrolled{background:rgba(255,255,255,.95);box-shadow:0 18px 44px rgba(31,95,168,.16);}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  height:64px;padding:0 14px 0 20px;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;color:var(--t-1);}
.brand:hover{color:var(--t-1);}
.brand-mark{
  width:30px;height:30px;flex:0 0 30px;border-radius:9px;
  background:
    linear-gradient(135deg,var(--c-primary) 0 52%,transparent 52%),
    linear-gradient(315deg,var(--c-accent) 0 46%,transparent 46%),
    var(--c-primary-l);
  box-shadow:inset 0 0 0 1px rgba(31,95,168,.18);
}
.brand-text{font-size:16px;letter-spacing:.2px;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:28px;}
.nav-link{
  position:relative;font-size:15px;color:var(--t-2);font-weight:500;padding:6px 2px;
  transition:color var(--ease),background var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-4px;transform:translateX(-50%);
  width:0;height:2px;border-radius:2px;background:var(--c-primary);transition:width 180ms ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{
  color:var(--c-primary);font-weight:600;background:rgba(31,95,168,.08);
  padding:6px 14px;border-radius:var(--r-pill);
}
.nav-link.is-active::after{display:none;}
.nav-cta-mobile{display:none;}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;padding:0;position:relative;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:var(--t-1);
  transition:transform var(--ease),opacity var(--ease),top var(--ease);
}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){top:21px;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){top:21px;transform:rotate(-45deg);}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0;}
.section--white{background:#fff;}
.section--soft{background:var(--c-bg);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-primary-l);color:var(--c-primary);font-size:13px;font-weight:600;margin-bottom:16px;
}
.section-head p{margin-top:14px;color:var(--t-2);font-size:16px;}
.section-head h2{position:relative;padding-left:14px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;background:var(--c-accent);
}

/* ---------- 首屏横幅 ---------- */
.hero-band{
  position:relative;overflow:hidden;
  background:
    linear-gradient(180deg,rgba(234,242,251,.94),rgba(245,247,250,.98)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding:132px 0 64px;
}
.hero-band::after{
  content:"";position:absolute;right:-60px;top:40px;width:260px;height:260px;border-radius:32px;
  background:linear-gradient(135deg,rgba(31,95,168,.10),rgba(217,116,52,.10));
  transform:rotate(18deg);pointer-events:none;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--t-3);margin-bottom:20px;
}
.breadcrumb a{color:var(--t-3);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb span.sep{color:var(--c-line);}
.breadcrumb .current{color:var(--t-2);font-weight:600;}
.hero-band h1{max-width:880px;color:var(--t-1);}
.hero-band h1 em{font-style:normal;color:var(--c-primary);}
.hero-band .hero-sub{margin-top:18px;max-width:720px;font-size:17px;color:var(--t-2);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.9);border:1px solid var(--c-line);color:var(--t-2);font-size:13px;
}
.tag i{color:var(--c-primary);font-size:12px;}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-primary-l);color:var(--c-primary);font-size:13px;font-weight:600;
}

/* ---------- 概览 + 深色面板 ---------- */
.overview{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:48px;align-items:center;}
.overview h2{margin-bottom:16px;}
.overview p{color:var(--t-2);margin-bottom:14px;}
.overview .checklist{margin-top:22px;display:grid;gap:12px;}
.overview .checklist li{display:flex;gap:10px;font-size:15px;color:var(--t-2);}
.overview .checklist i{color:var(--c-accent);margin-top:6px;font-size:12px;}
.hud{
  background:linear-gradient(160deg,var(--dark),var(--dark-2));
  border-radius:20px;padding:32px;color:var(--t-inv);
  box-shadow:0 22px 48px rgba(20,32,46,.28);
  border:1px solid rgba(255,255,255,.06);
}
.hud h3{color:#fff;font-size:18px;display:flex;align-items:center;gap:10px;margin-bottom:8px;}
.hud h3 i{color:var(--c-accent);}
.hud .hud-note{font-size:13px;color:rgba(255,255,255,.62);margin-bottom:24px;}
.hud-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.hud-item{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09);
  border-radius:14px;padding:18px;
}
.hud-item .k{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:8px;}
.hud-item .v{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:34px;font-weight:700;line-height:1;color:#fff;}
.hud-item .v small{font-size:14px;font-weight:500;color:rgba(255,255,255,.66);margin-left:6px;}
.hud-item .u{margin-top:8px;font-size:12px;color:rgba(255,255,255,.5);}
.hud-bar{margin-top:24px;padding-top:20px;border-top:1px dashed rgba(255,255,255,.16);font-size:13px;color:rgba(255,255,255,.7);}

/* ---------- 左右交替图文 ---------- */
.rows{display:grid;gap:64px;}
.feature-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center;}
.feature-row__media{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--sh-md);}
.feature-row__media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 400ms ease;}
.feature-row:hover .feature-row__media img{transform:scale(1.03);}
.feature-row__index{
  position:absolute;left:18px;top:18px;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.92);color:var(--c-primary);font-size:13px;font-weight:700;
  display:inline-flex;align-items:center;font-family:var(--font-num);
}
.feature-row__body h2{font-size:24px;margin-bottom:14px;}
.feature-row__body p{color:var(--t-2);margin-bottom:16px;}
.feature-row__body .mini-list{display:grid;gap:12px;margin-top:6px;}
.feature-row__body .mini-list li{
  display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--t-2);
  background:#fff;border:1px solid var(--c-line);border-radius:12px;padding:14px 16px;box-shadow:var(--sh-sm);
}
.feature-row__body .mini-list i{color:var(--c-primary);margin-top:5px;font-size:13px;}
.feature-row--reverse .feature-row__media{order:2;}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px;position:relative;}
.step{
  background:#fff;border:1px solid var(--c-line);border-radius:16px;padding:24px 20px;box-shadow:var(--sh-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(31,95,168,.28);}
.step .step-no{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--c-primary);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-num);font-weight:700;font-size:15px;margin-bottom:16px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--t-2);line-height:1.7;}

/* ---------- 场景清单 ---------- */
.scene{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:48px;align-items:start;}
.scene-intro h2{margin-bottom:16px;}
.scene-intro p{color:var(--t-2);}
.scene-list{display:grid;gap:0;}
.scene-list li{
  display:grid;grid-template-columns:14px minmax(0,1fr);gap:16px;
  padding:22px 0;border-bottom:1px dashed var(--c-line);
}
.scene-list li:first-child{padding-top:4px;}
.scene-list li:last-child{border-bottom:none;}
.scene-list .dot{
  width:10px;height:10px;margin-top:9px;border-radius:50%;background:var(--c-accent);
  box-shadow:0 0 0 5px rgba(217,116,52,.12);
}
.scene-list h4{margin-bottom:6px;}
.scene-list p{font-size:14px;color:var(--t-2);}

/* ---------- 提示对照 ---------- */
.tips{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.tip{
  background:#FAFBFD;border:1px solid var(--c-line);border-left:3px solid var(--c-primary);
  border-radius:12px;padding:24px;transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.tip:hover{border-left-color:var(--c-accent);box-shadow:var(--sh-md);transform:translateY(-2px);}
.tip h3{font-size:18px;margin-bottom:10px;}
.tip p{font-size:14px;color:var(--t-2);}
.tip .tip-state{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--c-warn);margin-top:14px;}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:14px;max-width:920px;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:12px;box-shadow:var(--sh-sm);
  overflow:hidden;transition:box-shadow var(--ease),border-color var(--ease);
}
.faq-item.is-open{border-color:rgba(31,95,168,.32);box-shadow:var(--sh-md);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;background:none;border:none;text-align:left;
  font-size:17px;font-weight:600;color:var(--t-1);
}
.faq-q .sign{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;background:var(--c-primary-l);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;transition:background var(--ease),color var(--ease);
}
.faq-item.is-open .faq-q .sign{background:var(--c-primary);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease;}
.faq-a__inner{
  padding:0 24px 22px;font-size:15px;line-height:1.8;color:var(--t-2);
  border-top:1px solid var(--c-line-soft);padding-top:16px;margin-top:0;
}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-primary-l);border-radius:20px;padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  border:1px solid rgba(31,95,168,.14);
}
.cta-band h2{font-size:24px;margin-bottom:8px;}
.cta-band p{color:var(--t-2);font-size:15px;max-width:620px;}
.cta-band .cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:72px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:3fr 2fr 2fr 3fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;margin-bottom:16px;}
.footer-brand .brand-mark{background:linear-gradient(135deg,#4E8FD0 0 52%,transparent 52%),linear-gradient(315deg,var(--c-accent) 0 46%,transparent 46%),rgba(255,255,255,.12);box-shadow:none;}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer-col ul{display:grid;gap:12px;}
.footer-col ul a{color:rgba(255,255,255,.72);font-size:14px;}
.footer-col ul a:hover{color:#fff;}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:rgba(255,255,255,.72);line-height:1.7;}
.footer-contact i{color:var(--c-accent);margin-top:4px;font-size:13px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 弹层 ---------- */
.modal-mask{
  position:fixed;inset:0;background:rgba(27,35,48,.5);z-index:200;
  display:none;align-items:center;justify-content:center;padding:20px;
}
.modal-mask.is-open{display:flex;animation:fadeIn 240ms ease;}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal-panel{
  width:480px;max-width:100%;background:#fff;border-radius:20px;padding:32px;
  position:relative;box-shadow:0 30px 70px rgba(20,32,46,.3);
  animation:rise 240ms ease;
}
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.modal-close{
  position:absolute;right:16px;top:16px;width:40px;height:40px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;color:var(--t-2);font-size:15px;
}
.modal-close:hover{background:var(--c-primary-l);color:var(--c-primary);}
.modal-panel h3{font-size:20px;margin-bottom:8px;}
.modal-panel .modal-sub{font-size:14px;color:var(--t-2);margin-bottom:22px;}
.form-row{margin-bottom:18px;}
.form-row label{display:block;font-size:13px;color:var(--t-3);margin-bottom:8px;}
.form-row input,.form-row textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  border:1px solid var(--c-line);background:#fff;transition:border-color var(--ease),box-shadow var(--ease);
}
.form-row textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.7;}
.form-row input:focus,.form-row textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(31,95,168,.16);
}
.form-privacy{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--t-3);margin:6px 0 18px;line-height:1.7;}
.form-privacy input{width:16px;height:16px;margin-top:4px;accent-color:var(--c-primary);}
.form-note{font-size:13px;color:var(--c-ok);margin-top:12px;display:none;}
.form-note.is-show{display:block;}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  h2{font-size:25px;}
  .steps{grid-template-columns:repeat(3,minmax(0,1fr));}
  .tips{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:991px){
  .section{padding:64px 0;}
  .overview,.scene{grid-template-columns:1fr;gap:32px;}
  .feature-row{grid-template-columns:1fr;gap:24px;}
  .feature-row--reverse .feature-row__media{order:0;}
  .rows{gap:48px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  h1{font-size:30px;}
  h2{font-size:23px;}
  .section{padding:48px 0;}
  .site-nav{top:10px;width:calc(100% - 20px);border-radius:20px;}
  .nav-inner{height:56px;padding:0 10px 0 14px;}
  .brand-text{font-size:14px;}
  .nav-toggle{display:block;}
  .nav-right .btn{display:none;}
  .nav-menu{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    display:none;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-radius:20px;border:1px solid var(--c-line);
    box-shadow:var(--sh-lg);padding:8px;overflow:hidden;
  }
  .nav-menu.is-open{display:flex;}
  .nav-link{padding:0 18px;height:48px;display:flex;align-items:center;font-size:15px;border-bottom:1px solid var(--c-line-soft);}
  .nav-link:last-of-type{border-bottom:none;}
  .nav-link::after{display:none;}
  .nav-link.is-active{background:rgba(31,95,168,.08);border-radius:12px;}
  .nav-cta-mobile{display:flex;color:var(--c-accent);font-weight:600;}
  body.nav-locked{overflow:hidden;}
  .hero-band{padding:104px 0 48px;}
  .hero-band::after{display:none;}
  .hero-actions .btn{width:100%;}
  .hud{padding:24px;}
  .hud-grid{grid-template-columns:1fr 1fr;gap:14px;}
  .hud-item .v{font-size:28px;}
  .steps{grid-template-columns:1fr;}
  .tips{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;}
  .modal-panel{padding:24px;width:92vw;}
}
@media (max-width:479px){
  .container{padding:0 16px;}
  .feature-row__body .mini-list li{padding:12px;}
  .tip{padding:20px;}
  .faq-q{padding:18px;font-size:16px;}
  .faq-a__inner{padding:14px 18px 20px;}
}

/* roulang page: category2 */
:root{
  --c-primary:#1F5FA8;
  --c-primary-d:#164A85;
  --c-primary-l:#EAF2FB;
  --c-accent:#D97434;
  --c-accent-d:#BC5F26;
  --c-bg:#F5F7FA;
  --c-card:#FFFFFF;
  --c-line:#E3E8EF;
  --c-line-2:#EDF1F6;
  --t-1:#1B2330;
  --t-2:#5A6675;
  --t-3:#8B95A3;
  --t-inv:#FFFFFF;
  --ok:#1F9D6B;
  --warn:#C08A20;
  --err:#C9423A;
  --dis:#C3CBD6;
  --dis-bg:#F0F3F7;
  --r-card:16px;
  --r-sm:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(27,35,48,.06);
  --sh-md:0 8px 24px rgba(31,95,168,.08);
  --sh-lg:0 16px 40px rgba(31,95,168,.12);
  --container:1200px;
  --ease:220ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--t-1);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--c-accent);}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--t-1);}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:.2px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.num{font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}

.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--alt{background:#FFFFFF;}
.section--tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head h2{font-size:28px;margin-bottom:14px;}
.section-head p{color:var(--t-2);font-size:16px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-block;font-size:13px;color:var(--c-primary);
  background:var(--c-primary-l);border-radius:var(--r-pill);
  padding:4px 12px;line-height:1.4;margin-bottom:16px;font-weight:600;
}

/* ---------- 悬浮胶囊导航 ---------- */
.site-nav{
  position:fixed;top:16px;left:50%;transform:translateX(-50%);
  width:min(1160px,calc(100% - 32px));
  z-index:120;
  background:rgba(255,255,255,.82);
  border:1px solid rgba(255,255,255,.7);
  box-shadow:var(--sh-lg);
  border-radius:var(--r-pill);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background var(--ease),box-shadow var(--ease);
}
.site-nav.is-scrolled{background:rgba(255,255,255,.95);box-shadow:0 16px 44px rgba(31,95,168,.16);}
.nav-inner{
  height:64px;display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding:0 14px 0 22px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--t-1);font-weight:700;}
.brand:hover{color:var(--t-1);}
.brand-mark{
  width:28px;height:28px;flex:0 0 auto;position:relative;display:inline-block;
  border-radius:9px;background:var(--c-primary-l);
  border:1px solid rgba(31,95,168,.28);
}
.brand-mark::before,.brand-mark::after{
  content:"";position:absolute;left:6px;width:14px;height:2px;border-radius:2px;
}
.brand-mark::before{background:var(--c-primary);top:10px;transform:rotate(-24deg);}
.brand-mark::after{background:var(--c-accent);top:16px;transform:rotate(-24deg);}
.brand-text{font-size:16px;letter-spacing:.2px;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;font-size:15px;color:var(--t-2);padding:8px 14px;border-radius:var(--r-pill);
  transition:color var(--ease),background var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:20%;right:20%;bottom:2px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transition:transform 180ms ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-primary);background:rgba(31,95,168,.08);}
.nav-link.is-active::after{transform:scaleX(0);}
.nav-right{display:flex;align-items:center;gap:10px;}
.nav-toggle{display:none;width:44px;height:44px;border-radius:14px;background:var(--c-primary-l);}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-primary);margin:3px auto;transition:transform var(--ease),opacity var(--ease);}
.nav-cta-mobile{display:none;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.2px;
  border:1px solid transparent;cursor:pointer;
  transition:transform var(--ease),background var(--ease),box-shadow var(--ease),color var(--ease),border-color var(--ease);
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--c-primary);color:var(--t-inv);box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--c-primary-d);color:var(--t-inv);transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-accent{background:var(--c-accent);color:var(--t-inv);box-shadow:var(--sh-sm);}
.btn-accent:hover{background:var(--c-accent-d);color:var(--t-inv);transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-l);color:var(--c-primary-d);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r-pill);}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{background:var(--dis-bg);color:var(--dis);border-color:var(--dis-bg);cursor:not-allowed;box-shadow:none;transform:none;}
.text-link{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.text-link i{transition:transform var(--ease);}
.text-link:hover i{transform:translateX(3px);}

/* ---------- 面包屑 + 顶部带 ---------- */
.page-band{position:relative;overflow:hidden;background:var(--c-primary-l);padding:130px 0 56px;}
.page-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;opacity:.16;
}
.page-band::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(245,247,250,.4),rgba(234,242,251,.94)),
    linear-gradient(rgba(31,95,168,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(31,95,168,.05) 1px,transparent 1px);
  background-size:100% 100%,48px 48px,48px 48px;
}
.page-band .container{position:relative;z-index:2;}
.crumbbar{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t-3);margin-bottom:20px;}
.crumbbar a{color:var(--t-3);}
.crumbbar a:hover{color:var(--c-primary);}
.crumbbar .sep{color:#C3CBD6;}
.crumbbar .now{color:var(--t-2);}
.page-band h1{font-size:clamp(30px,4vw,42px);line-height:1.2;color:var(--t-1);max-width:860px;}
.page-band .lede{margin-top:16px;max-width:640px;color:var(--t-2);font-size:17px;}
.page-band .band-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.page-band .band-note{font-size:13px;color:var(--t-3);}

/* ---------- 卡片网格（序号角标） ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-sm);
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);border-color:#D6E2F1;}
.num-card{display:flex;gap:18px;align-items:flex-start;}
.num-badge{
  flex:0 0 auto;width:44px;height:44px;border-radius:50%;
  border:2px solid var(--c-primary);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;letter-spacing:.5px;
}
.num-card h3{font-size:18px;margin-bottom:8px;}
.num-card p{color:var(--t-2);font-size:14.5px;}
.num-card ul{margin-top:12px;}
.num-card li{position:relative;padding-left:18px;font-size:14px;color:var(--t-2);margin-top:6px;}
.num-card li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:2px;background:var(--c-primary);}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;position:relative;}
.step{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 22px;box-shadow:var(--sh-sm);position:relative;
  transition:box-shadow var(--ease),transform var(--ease);
}
.step:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.step .step-idx{
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:13px;font-weight:700;color:var(--c-accent);letter-spacing:1px;
}
.step h3{font-size:17px;margin:10px 0 8px;}
.step p{font-size:14px;color:var(--t-2);}
.step::before{
  content:"";position:absolute;left:0;top:26px;bottom:26px;width:3px;border-radius:0 3px 3px 0;
  background:var(--c-primary);transition:background var(--ease);
}
.step:hover::before{background:var(--c-accent);}

/* ---------- 深色数据面板 ---------- */
.stat-panel{
  background:#14202E;border-radius:20px;padding:48px 40px;color:#fff;position:relative;overflow:hidden;
}
.stat-panel::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:44px 44px;opacity:.6;
}
.stat-panel > *{position:relative;z-index:2;}
.stat-panel .panel-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;align-items:flex-end;margin-bottom:32px;}
.stat-panel h2{color:#fff;font-size:26px;}
.stat-panel .panel-head p{color:#9FB0C4;font-size:14px;max-width:420px;}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.stat{border-left:2px solid rgba(217,116,52,.85);padding-left:18px;}
.stat .stat-num{font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;font-size:clamp(30px,3.4vw,38px);font-weight:700;line-height:1;color:#7FB3EA;}
.stat .stat-label{margin-top:10px;font-size:14px;color:#9FB0C4;line-height:1.6;}
.stat-panel .panel-foot{margin-top:30px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:13.5px;color:#9FB0C4;}

/* ---------- 图文 + 清单 ---------- */
.feature-2col{display:grid;grid-template-columns:5fr 6fr;gap:48px;align-items:center;}
.feature-media{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-md);background:var(--c-line-2);}
.feature-media img{width:100%;height:100%;object-fit:cover;border-radius:var(--r-card);}
.feature-body h2{font-size:27px;margin-bottom:14px;}
.feature-body > p{color:var(--t-2);margin-bottom:22px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;padding:14px 0;border-bottom:1px dashed var(--c-line);
  font-size:15px;color:var(--t-2);
}
.check-list li:last-child{border-bottom:0;}
.check-list i{color:var(--c-primary);margin-top:5px;font-size:14px;}
.check-list strong{color:var(--t-1);font-weight:600;}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{background:var(--c-card);border:1px solid var(--c-line);border-radius:12px;box-shadow:var(--sh-sm);overflow:hidden;transition:border-color var(--ease);}
.faq-item.is-open{border-color:#CBDDF2;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:17px;font-weight:600;color:var(--t-1);
}
.faq-q:hover{color:var(--c-primary);}
.faq-q .faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--c-primary-l);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:13px;}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms ease;}
.faq-a-inner{padding:0 24px 22px;border-top:1px solid var(--c-line-2);margin-top:0;padding-top:18px;font-size:15px;line-height:1.8;color:var(--t-2);}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-primary-l);border-radius:20px;padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:24px;margin-bottom:8px;}
.cta-band p{color:var(--t-2);font-size:15px;max-width:620px;}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:#14202E;color:#B8C4D2;margin-top:0;padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:3fr 2fr 2fr 3fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;margin-bottom:16px;}
.footer-desc{font-size:14px;line-height:1.85;color:#93A3B5;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:18px;font-weight:600;}
.footer-col ul li{margin-bottom:12px;font-size:14px;}
.footer-col ul li a{color:#B8C4D2;}
.footer-col ul li a:hover{color:#fff;}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;color:#93A3B5;}
.footer-contact i{color:#7FB3EA;margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#7E8C9E;
}

/* ---------- 弹层表单 ---------- */
.modal-mask{
  position:fixed;inset:0;background:rgba(27,35,48,.5);z-index:200;
  display:none;align-items:center;justify-content:center;padding:20px;
}
.modal-mask.is-open{display:flex;animation:fadeIn 240ms ease;}
.modal{
  width:480px;max-width:100%;background:#fff;border-radius:20px;padding:32px;
  box-shadow:var(--sh-lg);position:relative;animation:riseIn 240ms ease;
  max-height:90vh;overflow:auto;
}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes riseIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.modal h3{font-size:21px;margin-bottom:8px;}
.modal .modal-sub{font-size:14px;color:var(--t-2);margin-bottom:24px;}
.modal-close{
  position:absolute;top:16px;right:16px;width:40px;height:40px;border-radius:12px;
  background:var(--c-line-2);color:var(--t-2);display:flex;align-items:center;justify-content:center;
  transition:background var(--ease),color var(--ease);
}
.modal-close:hover{background:#E1E8F1;color:var(--t-1);}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;color:var(--t-3);margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;height:48px;border-radius:var(--r-sm);border:1px solid var(--c-line);
  padding:0 14px;background:#fff;transition:border-color var(--ease),box-shadow var(--ease);
}
.field textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.6;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(31,95,168,.14);
}
.field.has-error input,.field.has-error textarea,.field.has-error select{border-color:var(--err);}
.field .err-msg{display:none;font-size:13px;color:var(--err);margin-top:6px;}
.field.has-error .err-msg{display:block;}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--t-3);margin:4px 0 18px;}
.consent input{width:16px;height:16px;margin-top:4px;flex:0 0 auto;accent-color:var(--c-primary);}
.form-note{font-size:13px;color:var(--t-3);margin-top:14px;text-align:center;}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .container{padding:0 24px;}
  .page-band h1{font-size:34px;}
  .section-head h2{font-size:26px;}
  .feature-2col{gap:32px;}
}
@media (max-width:991px){
  .nav-inner{height:56px;padding:0 10px 0 16px;border-radius:20px;}
  .nav-toggle{display:block;}
  .nav-right .btn-accent{display:none;}
  .nav-menu{
    position:fixed;top:84px;left:16px;right:16px;
    background:#fff;border-radius:20px;box-shadow:var(--sh-lg);
    flex-direction:column;align-items:stretch;gap:0;padding:8px;
    display:none;max-height:calc(100vh - 120px);overflow:auto;
  }
  .nav-menu.is-open{display:flex;}
  .nav-link{padding:14px 16px;border-radius:12px;font-size:15px;}
  .nav-link::after{display:none;}
  .nav-link.is-active{background:var(--c-primary-l);}
  .nav-link + .nav-link{border-top:1px solid var(--c-line-2);}
  .nav-cta-mobile{display:block;color:var(--c-primary);font-weight:600;}
  .site-nav.is-open{border-radius:20px;}
  .section{padding:64px 0;}
  .section--tight{padding:48px 0;}
  .grid-2{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .feature-2col{grid-template-columns:1fr;}
  .stat-panel{padding:36px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .page-band{padding:112px 0 48px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:48px 0;}
  .page-band{padding:104px 0 40px;}
  .page-band h1{font-size:28px;}
  .page-band .lede{font-size:16px;}
  .section-head h2{font-size:23px;}
  .stat-grid{grid-template-columns:1fr;}
  .stat-panel{padding:28px 22px;}
  .stat{border-left-width:2px;}
  .card{padding:20px;}
  .num-card{flex-direction:column;gap:14px;}
  .cta-band{padding:28px 22px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .brand-text{font-size:14.5px;}
  .steps{grid-template-columns:1fr;}
  .band-actions .btn,.cta-actions .btn{width:100%;}
  .modal{padding:24px 20px;border-radius:18px;}
}

/* roulang page: category3 */
:root{
  --c-primary:#1F5FA8;
  --c-primary-dark:#164A85;
  --c-primary-light:#EAF2FB;
  --c-accent:#D97434;
  --c-bg:#F5F7FA;
  --c-card:#FFFFFF;
  --c-line:#E3E8EF;
  --c-line-soft:#EDF1F6;
  --c-text:#1B2330;
  --c-text-2:#5A6675;
  --c-text-3:#8B95A3;
  --c-footer:#14202E;
  --c-success:#1F9D6B;
  --c-error:#C9423A;
  --r-card:16px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(27,35,48,.06);
  --sh-md:0 8px 24px rgba(31,95,168,.08);
  --sh-lg:0 16px 40px rgba(31,95,168,.12);
  --space-section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
}
img{max-width:100%;display:block;border-radius:12px;background:#EDF1F6}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-accent)}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0}
button{font-family:inherit}
.num,.stat-num{font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}

.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0}
.section-alt{background:#FFFFFF}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:28px;margin-bottom:12px}
.section-head p{color:var(--c-text-2);margin:0}

/* ============ 导航 ============ */
.site-nav{position:fixed;top:16px;left:0;right:0;z-index:60;display:flex;justify-content:center;pointer-events:none}
.nav-inner{
  pointer-events:auto;
  width:min(1160px,calc(100% - 32px));
  height:64px;
  display:flex;
  align-items:center;
  gap:20px;
  padding:0 12px 0 20px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.82);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.7);
  box-shadow:var(--sh-lg);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-nav.is-scrolled .nav-inner{background:rgba(255,255,255,.95);box-shadow:0 18px 44px rgba(31,95,168,.16)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--c-text);white-space:nowrap}
.brand:hover{color:var(--c-primary)}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--c-primary);
  position:relative;overflow:hidden;flex:0 0 auto;display:inline-block;
}
.brand-mark::before{
  content:"";position:absolute;width:150%;height:5px;background:rgba(255,255,255,.9);
  transform:rotate(-45deg);top:7px;left:-25%;border-radius:2px;
}
.brand-mark::after{
  content:"";position:absolute;width:150%;height:5px;background:var(--c-accent);
  transform:rotate(-45deg);bottom:6px;left:-25%;border-radius:2px;
}
.brand-text{font-size:16px;letter-spacing:.01em}
.nav-menu{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-link{position:relative;font-size:15px;color:var(--c-text-2);padding:6px 2px;border-radius:var(--r-pill)}
.nav-link::after{
  content:"";position:absolute;left:20%;right:20%;bottom:-3px;height:2px;background:var(--c-primary);
  transform:scaleX(0);transform-origin:center;transition:transform .18s ease;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-primary);background:rgba(31,95,168,.08);padding:6px 12px}
.nav-link.is-active::after{display:none}
.nav-cta-mobile{display:none}
.nav-right{display:flex;align-items:center;gap:10px;margin-left:8px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;cursor:pointer;padding:0;align-items:center;justify-content:center;
  flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-text);border-radius:2px;transition:.2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,background .22s ease,box-shadow .22s ease,color .22s ease,border-color .22s ease;
}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-primary:active{transform:translateY(1px)}
.btn-accent{background:var(--c-accent);color:#fff}
.btn-accent:hover{background:#c3672c;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-accent:active{transform:translateY(1px)}
.btn-ghost{background:#fff;border-color:var(--c-primary);color:var(--c-primary)}
.btn-ghost:hover{background:var(--c-primary-light);color:var(--c-primary-dark)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-block{width:100%}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14px;font-weight:600}
.btn-link i{transition:transform .2s ease}
.btn-link:hover i{transform:translateX(3px)}

/* ============ 内页首屏 ============ */
.page-hero{
  padding:138px 0 52px;
  background-image:linear-gradient(120deg,rgba(234,242,251,.95),rgba(245,247,250,.92)),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--c-line-soft);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:16px}
.breadcrumb a{color:var(--c-text-3)}
.breadcrumb a:hover{color:var(--c-primary)}
.crumb-sep{color:var(--c-line)}
.hero-badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:rgba(31,95,168,.08);color:var(--c-primary);font-size:13px;font-weight:600;margin-bottom:16px;
}
.page-hero h1{font-size:clamp(30px,4vw,44px);line-height:1.2;max-width:900px;margin-bottom:14px}
.page-hero .lead{font-size:16px;color:var(--c-text-2);max-width:660px;margin-bottom:24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ============ 长文与锚点 ============ */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}
.article-main{max-width:780px}
.toc-strip{display:none;gap:10px;overflow-x:auto;padding:2px 0 12px;margin-bottom:24px;scrollbar-width:thin}
.toc-strip a{
  flex:0 0 auto;padding:8px 14px;border-radius:var(--r-pill);background:#fff;
  border:1px solid var(--c-line);font-size:13px;color:var(--c-text-2);white-space:nowrap;
}
.toc-strip a:hover{border-color:var(--c-primary);color:var(--c-primary)}
.longform h2{
  font-size:28px;line-height:1.3;margin:0 0 18px;padding-left:14px;border-left:4px solid var(--c-primary);
}
.longform h3{font-size:20px;margin:26px 0 12px}
.longform p{color:var(--c-text-2);margin-bottom:16px}
.longform section{scroll-margin-top:110px}
.dash-sep{border:0;border-top:1px dashed var(--c-line);margin:44px 0}
.key-list{list-style:none;margin:18px 0 22px}
.key-list li{position:relative;padding-left:24px;margin-bottom:12px;color:var(--c-text-2);font-size:15px}
.key-list li::before{
  content:"";position:absolute;left:4px;top:11px;width:8px;height:8px;border-radius:50%;background:var(--c-accent);
}
.check-list{list-style:none;margin:18px 0 22px}
.check-list li{
  position:relative;padding:14px 16px 14px 44px;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-sm);margin-bottom:10px;font-size:15px;color:var(--c-text-2);
}
.check-list li::before{
  content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;
  position:absolute;left:16px;top:16px;width:18px;height:18px;border-radius:5px;
  background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;
}
.figure{margin:26px 0}
.figure figcaption{font-size:13px;color:var(--c-text-3);text-align:center;margin-top:10px}

.compare{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:24px 0}
.compare-card{background:#fff;border:1px solid var(--c-line);border-radius:12px;padding:22px;box-shadow:var(--sh-sm)}
.compare-card h3{margin:0 0 10px;font-size:17px;display:flex;align-items:center;gap:8px}
.compare-card h3 i{color:var(--c-primary)}
.compare-card ul{list-style:none;margin:0}
.compare-card li{position:relative;padding-left:18px;font-size:14px;color:var(--c-text-2);margin-bottom:8px}
.compare-card li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;background:var(--c-primary);
}

.hud-panel{background:var(--c-footer);color:#fff;border-radius:20px;padding:28px;margin:28px 0}
.hud-panel h3{color:#fff;font-size:18px;margin:0 0 6px}
.hud-panel .hud-note{color:rgba(255,255,255,.55);font-size:13px;margin:0 0 16px}
.hud-row{display:grid;grid-template-columns:1fr auto;gap:16px;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:15px}
.hud-row:last-child{border-bottom:0}
.hud-row span:first-child{color:rgba(255,255,255,.72)}
.hud-row span:last-child{color:#fff;font-weight:600}
.hud-row span:last-child em{color:var(--c-accent);font-style:normal}

.path-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:26px 0}
.path-step{background:#fff;border:1px solid var(--c-line);border-radius:12px;padding:20px;box-shadow:var(--sh-sm);transition:box-shadow .22s ease,transform .22s ease}
.path-step:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.step-num{
  width:32px;height:32px;border-radius:50%;border:2px solid var(--c-primary);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;margin-bottom:12px;
  font-family:Inter,system-ui,sans-serif;
}
.path-step h4{font-size:16px;margin-bottom:8px}
.path-step p{margin:0;font-size:14px;color:var(--c-text-2)}

.qa-list{display:grid;gap:16px;margin:24px 0}
.qa-item{background:#fff;border:1px solid var(--c-line);border-radius:12px;padding:22px;box-shadow:var(--sh-sm)}
.qa-item h3{font-size:17px;margin:0 0 10px;display:flex;gap:10px;align-items:flex-start}
.qa-item h3 i{color:var(--c-accent);font-size:15px;margin-top:5px}
.qa-item p{margin:0;color:var(--c-text-2);font-size:15px;padding-left:25px}

/* ============ 右侧锚点 ============ */
.article-aside{position:relative}
.anchor-card{
  position:sticky;top:96px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-sm);
}
.anchor-card h3{font-size:14px;color:var(--c-text-3);letter-spacing:.04em;margin:0 0 14px}
.anchor-list{list-style:none}
.anchor-list a{display:block;padding:9px 10px;border-radius:8px;font-size:14px;color:var(--c-text-2)}
.anchor-list a:hover{background:var(--c-primary-light);color:var(--c-primary)}
.anchor-help{margin-top:18px;padding-top:18px;border-top:1px solid var(--c-line-soft)}
.anchor-help p{font-size:13px;color:var(--c-text-3);margin:0 0 12px}

/* ============ CTA 条 ============ */
.cta-band{
  background:var(--c-primary-light);border-radius:20px;padding:36px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;margin-top:56px;
}
.cta-band h2{font-size:24px;margin-bottom:8px}
.cta-band p{margin:0;color:var(--c-text-2);font-size:15px;max-width:560px}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:var(--space-section)}
.footer-grid{display:grid;grid-template-columns:3fr 2fr 2fr 3fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;margin-bottom:14px;font-size:15px}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);margin:0}
.footer-col h4{color:#fff;font-size:15px;margin:0 0 16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px}
.footer-col a:hover{color:#fff}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:rgba(255,255,255,.6);line-height:1.7}
.footer-contact i{color:var(--c-accent);margin-top:5px}
.footer-bottom{
  margin-top:48px;padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 弹层表单 ============ */
.modal{position:fixed;inset:0;z-index:100;display:none}
.modal.is-open{display:block}
.modal-mask{position:absolute;inset:0;background:rgba(27,35,48,.5)}
.modal-panel{
  position:relative;width:480px;max-width:92vw;margin:7vh auto;background:#fff;border-radius:20px;
  padding:32px;box-shadow:var(--sh-lg);animation:modalIn .24s ease;max-height:86vh;overflow-y:auto;
}
@keyframes modalIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.modal-close{
  position:absolute;top:16px;right:16px;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--c-line);background:#fff;color:var(--c-text-2);font-size:18px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:.2s ease;
}
.modal-close:hover{border-color:var(--c-primary);color:var(--c-primary)}
.modal-panel h3{font-size:20px;margin-bottom:8px}
.modal-sub{font-size:14px;color:var(--c-text-3);margin-bottom:22px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--c-text-3);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;min-height:48px;padding:12px 14px;border:1px solid var(--c-line);border-radius:var(--r-sm);
  font-size:15px;font-family:inherit;color:var(--c-text);background:#fff;transition:.2s ease;
}
.field textarea{min-height:110px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(31,95,168,.18);
}
.field.has-error input{border-color:var(--c-error)}
.field-error{font-size:13px;color:var(--c-error);margin:6px 0 0}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--c-text-3);margin:6px 0 18px}
.check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--c-primary)}
.form-note{margin:14px 0 0;font-size:13px;color:var(--c-success)}
body.modal-open{overflow:hidden}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:36px}
  .longform h2{font-size:25px}
}
@media (max-width:991px){
  :root{--space-section:64px}
  .section-head h2{font-size:24px}
  .article-layout{grid-template-columns:1fr}
  .article-aside{display:none}
  .toc-strip{display:flex}
  .path-steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .nav-toggle{display:flex}
  .nav-right .btn-sm{display:none}
  .nav-menu{
    position:fixed;top:84px;left:16px;right:16px;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-radius:20px;padding:8px;box-shadow:var(--sh-lg);margin-left:0;display:none;
    max-height:calc(100vh - 120px);overflow-y:auto;
  }
  .nav-menu.is-open{display:flex}
  .nav-link{padding:14px 16px;font-size:15px;border-bottom:1px solid var(--c-line-soft);border-radius:0}
  .nav-link:last-child{border-bottom:0}
  .nav-link::after{display:none}
  .nav-link.is-active{background:var(--c-primary-light);border-radius:10px;margin:4px 0}
  .nav-cta-mobile{display:block;color:var(--c-accent);font-weight:600}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .page-hero{padding:120px 0 40px}
  .page-hero h1{font-size:30px}
  .longform h2{font-size:23px}
  .compare{grid-template-columns:1fr}
  .hud-row{grid-template-columns:1fr;gap:4px}
  .big-num{font-size:32px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .cta-band h2{font-size:21px}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .btn{width:100%}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .path-steps{grid-template-columns:1fr}
  .compare-card,.qa-item,.path-step,.anchor-card{padding:16px}
  .modal-panel{padding:22px}
}