/* roulang page: index */
:root{
  --brand:#2B6CD4;
  --brand-dark:#1F55AC;
  --brand-light:#E8F0FE;
  --sand:#E4813C;
  --sand-light:#FDF1E7;
  --bamboo:#2E9C82;
  --bamboo-light:#E6F5F1;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E6EBF2;
  --ink:#16202E;
  --sub:#4A5568;
  --mute:#8A94A6;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --sh-card:0 1px 2px rgba(22,32,46,.04), 0 10px 28px rgba(22,32,46,.06);
  --sh-hover:0 1px 2px rgba(22,32,46,.05), 0 14px 34px rgba(22,32,46,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--ink)}
p{margin:0}
:focus-visible{outline:3px solid rgba(43,108,212,.35);outline-offset:2px;border-radius:8px}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ---------- 顶部信息条 ---------- */
.topbar{background:#F1F5FB;border-bottom:1px solid var(--line);font-size:13px;color:var(--sub)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px;flex-wrap:wrap}
.topbar-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.topbar-domain{color:var(--brand-dark);font-weight:600;letter-spacing:.2px;font-variant-numeric:tabular-nums}
.topbar-sep{width:1px;height:12px;background:#CBD6E6;display:inline-block}
.topbar-right{display:flex;align-items:center;gap:16px}
.topbar-link{color:var(--sub);transition:color .18s}
.topbar-link:hover{color:var(--brand)}
.topbar-cta{color:var(--brand);font-weight:600;border-bottom:1px dashed rgba(43,108,212,.5)}
.topbar-cta:hover{color:var(--brand-dark);border-bottom-color:var(--brand-dark)}
@media (max-width:639px){.topbar-inner{padding-top:8px;padding-bottom:8px}.topbar-right{width:100%;justify-content:space-between}}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-stuck{box-shadow:0 8px 20px rgba(22,32,46,.07)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{width:38px;height:38px;border-radius:12px;background:var(--brand-light);display:flex;align-items:center;justify-content:center;flex:none}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-name{font-size:19px;font-weight:700;letter-spacing:1px;color:var(--ink)}
.logo-sub{font-size:12px;color:var(--mute);letter-spacing:.3px}
.main-nav{display:none;align-items:center;gap:30px}
@media (min-width:1024px){.main-nav{display:flex}.nav-toggle{display:none}}
.nav-link{position:relative;padding:6px 2px;font-size:15px;font-weight:500;color:var(--sub);transition:color .18s}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;background:var(--brand);transform:scaleX(0);transition:transform .22s ease}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:border-color .18s,background .18s}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-light)}
.drawer-mask{position:fixed;inset:0;background:rgba(16,26,43,.45);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:70}
.drawer-mask.open{opacity:1;visibility:visible}
.mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);background:#fff;padding:24px;overflow-y:auto;transform:translateX(100%);transition:transform .28s ease;z-index:80;box-shadow:-12px 0 32px rgba(22,32,46,.14)}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.drawer-close:hover{border-color:var(--brand)}
.drawer-nav a{display:block;padding:14px 4px;font-size:16px;color:var(--sub);border-bottom:1px solid var(--line)}
.drawer-nav a.active{color:var(--brand);font-weight:600}
.drawer-foot{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.drawer-tip{font-size:13px;color:var(--mute)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-md);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(43,108,212,.22)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 10px 24px rgba(43,108,212,.28)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(43,108,212,.2)}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(43,108,212,.35)}
.btn-ghost:hover{background:var(--brand-light);border-color:var(--brand)}
.btn-sand{background:var(--sand);color:#fff;box-shadow:0 6px 16px rgba(228,129,60,.22)}
.btn-sand:hover{background:#cf6f2c;transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:10px}
.btn-block{width:100%}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px;transition:gap .18s ease,color .18s ease}
.text-link:hover{gap:10px;color:var(--brand-dark)}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:88px 0}}
@media (min-width:1024px){.section{padding:112px 0}}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.2px}
.section-head p{margin-top:12px;color:var(--sub);font-size:16px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--brand-light);color:var(--brand-dark);font-size:13px;font-weight:600;letter-spacing:.2px}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.6}
.badge-brand{background:var(--brand-light);color:var(--brand-dark)}
.badge-sand{background:var(--sand-light);color:#B9611F}
.badge-bamboo{background:var(--bamboo-light);color:#1F7A66}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-card);transition:box-shadow .22s ease,transform .22s ease}
.card-hover:hover{box-shadow:var(--sh-hover);transform:translateY(-2px)}
.divider-dashed{border-top:1px dashed #D8E1EE}

/* ---------- Hero ---------- */
.hero{position:relative;padding:48px 0 56px;background:#fff;overflow:hidden}
@media (min-width:1024px){.hero{padding:72px 0 88px}}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='120' viewBox='0 0 220 120'><path d='M0 90c30-26 60-26 90 0s60 26 90 0' fill='none' stroke='%232B6CD4' stroke-opacity='0.10' stroke-width='1.2'/><path d='M0 40c30-24 60-24 90 0s60 24 90 0' fill='none' stroke='%232B6CD4' stroke-opacity='0.07' stroke-width='1.2'/></svg>");
  background-repeat:no-repeat;
  background-position:right -40px top 10px;
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr;gap:40px;align-items:center}
@media (min-width:1024px){.hero-grid{grid-template-columns:55fr 45fr;gap:56px}}
.hero h1{font-size:clamp(30px,4.2vw,52px);line-height:1.15;font-weight:700;letter-spacing:-.6px;margin-top:20px}
.hero-sub{margin-top:20px;color:var(--sub);font-size:clamp(16px,1.2vw,17px);line-height:1.85;max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-facts{display:flex;flex-wrap:wrap;gap:28px;margin-top:34px;padding-top:26px;border-top:1px dashed #D8E1EE}
.hero-facts li{display:flex;align-items:baseline;gap:8px}
.hero-facts strong{font-size:26px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1}
.hero-facts span{font-size:13px;color:var(--mute)}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-xl);box-shadow:0 26px 50px rgba(22,32,46,.14)}
.float-card{position:absolute;left:-8px;bottom:22px;background:#fff;border-radius:14px;box-shadow:0 14px 32px rgba(22,32,46,.16);padding:14px 18px;display:flex;align-items:center;gap:12px}
@media (max-width:639px){.float-card{left:8px;bottom:12px;padding:10px 14px}}
.float-card .dot{width:10px;height:10px;border-radius:50%;background:var(--bamboo);flex:none;box-shadow:0 0 0 4px rgba(46,156,130,.16)}
.float-card strong{display:block;font-size:14px;font-weight:600}
.float-card span{font-size:12px;color:var(--mute)}

/* ---------- 权益对比表 ---------- */
.table-scroll{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-card);-webkit-overflow-scrolling:touch}
.table-scroll::-webkit-scrollbar{height:8px}
.table-scroll::-webkit-scrollbar-thumb{background:#D5DEEA;border-radius:8px}
.benefit-table{width:100%;min-width:880px;border-collapse:separate;border-spacing:0}
.benefit-table th,.benefit-table td{padding:0 16px;height:52px;text-align:center;font-size:15px;border-bottom:1px solid var(--line)}
.benefit-table thead th{background:var(--brand-light);color:var(--brand-dark);font-weight:600;font-size:14px;height:58px;white-space:nowrap}
.benefit-table tbody tr:nth-child(even){background:#FAFCFF}
.benefit-table tbody tr:last-child td{border-bottom:none}
.benefit-table th:first-child,.benefit-table td:first-child{text-align:left;color:var(--ink);font-weight:500;width:230px}
.benefit-table .col-reco{background:rgba(43,108,212,.07)}
.benefit-table thead .col-reco{background:#D8E6FB}
.ico-yes,.ico-no{display:inline-block;vertical-align:middle}
.table-note{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:13px;color:var(--mute)}
.table-foot{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:22px;flex-wrap:wrap}
.reco-tag{display:inline-flex;padding:2px 8px;border-radius:999px;background:var(--sand);color:#fff;font-size:11px;font-weight:600;margin-left:6px;vertical-align:middle}

/* ---------- 等级亮点 ---------- */
.tier-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:640px){.tier-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){
  .tier-grid{grid-template-columns:repeat(4,1fr);gap:24px;align-items:start}
  .tier-card:nth-child(1){margin-top:0}
  .tier-card:nth-child(2){margin-top:26px}
  .tier-card:nth-child(3){margin-top:52px}
  .tier-card:nth-child(4){margin-top:78px}
}
.tier-card{padding:26px 24px;display:flex;flex-direction:column;gap:16px}
.tier-num{font-size:13px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:1px}
.tier-card h3{font-size:20px;font-weight:600}
.tier-card .tier-price{font-size:13px;color:var(--mute)}
.tier-list{display:flex;flex-direction:column;gap:10px}
.tier-list li{position:relative;padding-left:20px;font-size:14px;color:var(--sub);line-height:1.7}
.tier-list li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;background:var(--brand);opacity:.75}

/* ---------- 专属内容预览 ---------- */
.preview-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:1024px){.preview-grid{grid-template-columns:58fr 42fr;gap:28px;align-items:stretch}}
.preview-big{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-card);min-height:280px}
.preview-big img{width:100%;height:100%;min-height:280px;object-fit:cover}
.preview-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(16,26,43,.10) 0%,rgba(16,26,43,.78) 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:28px;color:#fff}
.preview-veil h3{color:#fff;font-size:22px;font-weight:600}
.preview-veil p{margin-top:8px;font-size:14px;color:rgba(255,255,255,.82)}
.preview-side{display:flex;flex-direction:column;gap:16px}
.preview-item{display:flex;align-items:center;gap:16px;padding:16px;border-radius:var(--r-md)}
.preview-thumb{width:96px;height:64px;border-radius:10px;object-fit:cover;flex:none}
.preview-item h3{font-size:16px;font-weight:600}
.preview-item span{font-size:12px;color:var(--mute)}
.lock-icon{width:34px;height:34px;border-radius:10px;background:var(--sand-light);display:flex;align-items:center;justify-content:center;flex:none}

/* ---------- 最新信息 ---------- */
.news-feature{display:grid;grid-template-columns:1fr;overflow:hidden}
@media (min-width:768px){.news-feature{grid-template-columns:44fr 56fr}}
.news-feature-media{position:relative;min-height:220px}
.news-feature-media img{width:100%;height:100%;min-height:220px;object-fit:cover}
.news-feature-body{padding:26px 28px;display:flex;flex-direction:column;gap:12px;justify-content:center}
.news-feature-body h3{font-size:22px;font-weight:600;line-height:1.4}
.news-feature-body p{color:var(--sub);font-size:15px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--mute);flex-wrap:wrap}
.news-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:24px}
@media (min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr)}}
.news-item{display:grid;grid-template-columns:112px 1fr;gap:16px;padding:16px;border-radius:var(--r-lg);align-items:start}
@media (min-width:640px){.news-item{grid-template-columns:148px 1fr}}
.news-item img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:10px}
.news-item h3{font-size:16px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item p{margin-top:6px;font-size:13px;color:var(--sub);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item .news-meta{margin-top:8px}
.empty-state{min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:#fff;border:1px dashed #D8E1EE;border-radius:var(--r-lg);padding:32px;text-align:center}
.empty-state p{color:var(--mute);font-size:14px}

/* ---------- 服务流程时间轴 ---------- */
.timeline{position:relative;display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.timeline{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.timeline{grid-template-columns:repeat(4,1fr);gap:24px}}
.timeline li{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 22px;box-shadow:var(--sh-card)}
.timeline .tl-num{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:12px;background:var(--brand-light);color:var(--brand-dark);font-weight:700;font-size:14px;font-variant-numeric:tabular-nums;margin-bottom:16px}
.timeline h3{font-size:17px;font-weight:600;margin-bottom:8px}
.timeline p{font-size:14px;color:var(--sub);line-height:1.75}
@media (min-width:1024px){
  .timeline li::after{content:"";position:absolute;right:-14px;top:44px;width:28px;height:1px;border-top:1px dashed #C9D5E6}
  .timeline li:last-child::after{display:none}
}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{background:#fff;border:1px solid var(--line);border-left:4px solid transparent;border-radius:var(--r-md);box-shadow:0 1px 2px rgba(22,32,46,.03);transition:border-color .2s ease,box-shadow .2s ease}
.faq-item[open]{border-left-color:var(--brand);box-shadow:var(--sh-card)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;font-size:17px;font-weight:600;color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;font-weight:400;color:var(--brand);line-height:1;flex:none;transition:transform .2s ease}
.faq-item[open] summary::after{content:"−"}
.faq-item summary:hover{color:var(--brand)}
.faq-body{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--sub)}

/* ---------- CTA / 表单 ---------- */
.cta-band{background:linear-gradient(180deg,#EEF4FD 0%,#E8F0FE 100%);border-top:1px solid #DCE7F8;padding:56px 0}
@media (min-width:768px){.cta-band{padding:80px 0}}
.cta-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:start}
@media (min-width:1024px){.cta-grid{grid-template-columns:52fr 48fr;gap:56px}}
.cta-copy h2{font-size:clamp(24px,2.6vw,34px);line-height:1.25}
.cta-copy p{margin-top:14px;color:var(--sub)}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:14px}
.cta-points li{position:relative;padding-left:26px;font-size:15px;color:var(--sub)}
.cta-points li::before{content:"";position:absolute;left:0;top:8px;width:14px;height:14px;border-radius:50%;background:var(--bamboo-light);box-shadow:inset 0 0 0 4px #fff,0 0 0 1px rgba(46,156,130,.3)}
.cta-points li::after{content:"";position:absolute;left:5px;top:13px;width:4px;height:4px;border-radius:50%;background:var(--bamboo)}
.apply-form{background:#fff;border-radius:20px;padding:26px;box-shadow:0 20px 46px rgba(22,32,46,.10)}
@media (min-width:768px){.apply-form{padding:32px}}
.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:13px;font-weight:500;color:var(--sub);margin-bottom:6px}
.form-row input,.form-row select,.form-row textarea{width:100%;height:44px;border:1px solid var(--line);border-radius:var(--r-md);padding:0 14px;background:#fff;font-size:15px;transition:border-color .18s ease,box-shadow .18s ease}
.form-row textarea{height:auto;padding:12px 14px;line-height:1.7;resize:vertical}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(43,108,212,.15)}
.form-row input:invalid:not(:placeholder-shown){border-color:#D9534F}
.form-check{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--sub);margin:4px 0 18px;line-height:1.7}
.form-check input{width:16px;height:16px;margin-top:3px;accent-color:var(--brand);flex:none}
.form-done{margin-top:14px;font-size:14px;color:#1F7A66;background:var(--bamboo-light);border-radius:var(--r-md);padding:12px 16px}

/* ---------- 页脚 ---------- */
.site-footer{background:#101A2B;color:#AEB9CB;padding:56px 0 0}
@media (min-width:768px){.site-footer{padding:72px 0 0}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .logo-mark{background:rgba(255,255,255,.08)}
.footer-brand .logo-name{color:#fff;font-size:19px}
.footer-brand .logo-sub{color:#7E8A9E}
.footer-desc{font-size:14px;line-height:1.8;color:#93A0B5;max-width:320px}
.footer-title{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px}
.footer-link{display:block;font-size:14px;color:#AEB9CB;padding:6px 0;transition:color .18s ease,padding-left .18s ease}
.footer-link:hover{color:#fff;padding-left:4px}
.footer-contact li{font-size:14px;padding:6px 0;color:#AEB9CB}
.footer-contact strong{color:#fff;font-weight:600}
.footer-bottom{margin-top:44px;border-top:1px solid rgba(255,255,255,.08);padding:20px 0;display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;font-size:13px;color:#7E8A9E}
.footer-bottom a{color:#93A0B5}
.footer-bottom a:hover{color:#fff}

/* ---------- 通用响应式修补 ---------- */
@media (max-width:519px){
  .hero-facts{gap:18px}
  .news-feature-body{padding:20px}
  .preview-item{gap:12px}
  .preview-thumb{width:76px;height:52px}
}

/* roulang page: article */
:root{
  --brand:#2B6CD4;
  --brand-dark:#1F55AC;
  --brand-soft:#E8F0FE;
  --accent:#E4813C;
  --accent-soft:#FDF0E6;
  --jade:#2E9C82;
  --jade-soft:#E7F5F1;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E6EBF2;
  --ink:#16202E;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --sh:0 1px 2px rgba(22,32,46,.04), 0 10px 28px rgba(22,32,46,.06);
  --sh-hover:0 2px 4px rgba(22,32,46,.05), 0 14px 34px rgba(22,32,46,.10);
  --ff:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ff);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
button{font-family:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--ink)}
p{margin:0}
:focus-visible{outline:3px solid rgba(43,108,212,.35);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ============ 头部 / 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 20px rgba(22,32,46,.06)}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:68px;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:40px;height:40px;border-radius:12px;
  background:var(--brand-soft);
  display:inline-flex;align-items:center;justify-content:center;
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-name{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.5px}
.logo-sub{font-size:12px;color:var(--ink-3)}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:38px;padding:0 14px;
  font-size:15px;color:var(--ink-2);
  border-radius:10px;
  white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:var(--brand-soft)}
.nav-link.active{color:var(--brand);font-weight:600;background:var(--brand-soft)}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;
  height:44px;padding:0 22px;
  font-size:15px;font-weight:600;
  border-radius:var(--r-md);
  border:1px solid transparent;
  transition:transform .16s ease,background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(43,108,212,.22)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:var(--brand-dark)}
.btn-outline{background:#fff;color:var(--brand);border-color:rgba(43,108,212,.45)}
.btn-outline:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-quiet{background:transparent;color:var(--brand);padding:0 6px;height:auto;font-weight:600}
.btn-quiet::after{content:"→";margin-left:6px;transition:transform .18s ease}
.btn-quiet:hover::after{transform:translateX(3px)}

/* ============ 面包屑 ============ */
.crumb-bar{background:#fff;border-bottom:1px solid var(--line)}
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:6px;
  font-size:13px;color:var(--ink-3);
  padding:14px 0;
}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C6D0DE}
.crumb .crumb-now{color:var(--brand);font-weight:600;max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章布局 ============ */
.article-shell{padding:36px 0 0}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:32px;
}
.article-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  box-shadow:var(--sh);
  padding:26px 20px 32px;
}
@media (min-width:768px){.article-card{padding:40px 44px 48px}}
.article-head{padding-bottom:22px}
.eyebrow{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  font-size:12px;font-weight:600;
  color:var(--brand);
  background:var(--brand-soft);
  border-radius:999px;
}
.article-title{
  font-size:clamp(24px,3.4vw,36px);
  line-height:1.3;
  font-weight:700;
  margin:16px 0 16px;
  letter-spacing:.2px;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;
  font-size:13px;color:var(--ink-3);
  padding-top:6px;
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C6D0DE}
.meta-row .meta-strong{color:var(--ink-2);font-weight:600}
.head-rule{height:1px;background:var(--line);margin-top:22px}

/* ============ 正文 ============ */
.article-content{font-size:16px;line-height:1.9;color:var(--ink);padding-top:26px}
.article-content p{margin:0 0 16px;max-width:38em}
.article-content h2{
  position:relative;
  font-size:clamp(20px,2.2vw,24px);
  line-height:1.4;
  margin:42px 0 16px;
  padding-left:16px;
}
.article-content h2:first-child{margin-top:0}
.article-content h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:2px;background:var(--brand);
}
.article-content h3{font-size:19px;line-height:1.45;font-weight:600;margin:28px 0 12px}
.article-content h4{font-size:17px;font-weight:600;margin:22px 0 10px}
.article-content ul,.article-content ol{margin:0 0 18px;padding-left:22px}
.article-content ul li{list-style:disc}
.article-content ol li{list-style:decimal}
.article-content li{margin:7px 0;line-height:1.85}
.article-content blockquote{
  margin:24px 0;padding:16px 20px;
  background:var(--brand-soft);
  border-left:3px solid var(--brand);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-2);font-size:15px;line-height:1.85;
}
.article-content blockquote p{margin-bottom:8px}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{border-radius:12px;margin:20px 0}
.article-content table{
  width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;
  font-variant-numeric:tabular-nums;
  display:block;overflow-x:auto;white-space:nowrap;
}
@media (min-width:768px){.article-content table{display:table;white-space:normal}}
.article-content th,.article-content td{border:1px solid var(--line);padding:12px 14px;text-align:left;line-height:1.65}
.article-content th{background:var(--brand-soft);font-weight:600;color:var(--ink)}
.article-content tbody tr:nth-child(even) td{background:#FAFCFF}
.article-content a{color:var(--brand);border-bottom:1px solid rgba(43,108,212,.35)}
.article-content a:hover{color:var(--brand-dark);border-bottom-color:var(--brand-dark)}
.article-content code{background:#F1F5FB;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:14px}
.article-content hr{border:0;border-top:1px dashed var(--line);margin:30px 0}

/* ============ 空态 ============ */
.empty-state{
  min-height:280px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;gap:12px;
  padding:34px 20px;
  border:1px dashed var(--line);
  border-radius:var(--r-lg);
  background:#FAFCFF;
}
.empty-state svg{opacity:.5}
.empty-state h2{font-size:20px;padding:0}
.empty-state h2::before{display:none}
.empty-state p{color:var(--ink-2);font-size:15px;max-width:34em}

/* ============ 标签 / 翻页 ============ */
.tag-block{margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.tag-block h3{font-size:14px;color:var(--ink-3);font-weight:600;margin-bottom:12px}
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;
  height:30px;padding:0 14px;
  font-size:13px;color:var(--brand);
  background:var(--brand-soft);
  border-radius:999px;
}
.tag:hover{background:#DCE8FB}
.tag-accent{color:#B4611F;background:var(--accent-soft)}
.pager{display:grid;grid-template-columns:1fr;gap:14px;margin-top:28px}
@media (min-width:640px){.pager{grid-template-columns:1fr 1fr}}
.pager a{
  display:block;padding:16px 18px;
  background:#FAFCFF;border:1px solid var(--line);border-radius:var(--r-md);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.pager a:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--sh)}
.pager .pager-label{display:block;font-size:12px;color:var(--ink-3);margin-bottom:6px}
.pager .pager-title{font-size:15px;font-weight:600;color:var(--ink)}
.back-cat{display:inline-flex;margin-top:22px;font-size:14px;color:var(--brand);font-weight:600}
.back-cat:hover{color:var(--brand-dark)}

/* ============ 侧栏 ============ */
.article-aside{align-self:start}
.aside-sticky{display:flex;flex-direction:column;gap:18px}
@media (min-width:1024px){.aside-sticky{position:sticky;top:88px}}
.aside-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh);
  padding:20px;
}
.aside-title{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:12px;display:flex;align-items:center;gap:8px}
.aside-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand)}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-link{
  display:block;font-size:14px;line-height:1.6;color:var(--ink-2);
  padding:7px 10px;border-radius:var(--r-sm);
  border-left:2px solid transparent;
}
.toc-link:hover{background:var(--brand-soft);color:var(--brand);border-left-color:var(--brand)}
.aside-links{display:flex;flex-direction:column;gap:2px}
.aside-links a{
  display:flex;align-items:center;justify-content:space-between;
  font-size:14px;color:var(--ink-2);padding:9px 10px;border-radius:var(--r-sm);
}
.aside-links a:hover{background:var(--brand-soft);color:var(--brand)}
.aside-links a span{color:var(--ink-3);font-size:13px}
.aside-cta{
  background:linear-gradient(180deg,#F3F8FF 0%,#E8F0FE 100%);
  border-color:#D6E4FA;
}
.aside-cta h3{font-size:17px;line-height:1.5;margin-bottom:8px}
.aside-cta p{font-size:14px;color:var(--ink-2);line-height:1.75;margin-bottom:16px}
.aside-cta .btn{width:100%}
.aside-meta{font-size:13px;color:var(--ink-3);display:flex;flex-direction:column;gap:8px}
.aside-meta b{color:var(--ink-2);font-weight:600}

/* ============ 相关推荐 ============ */
.section{padding:56px 0 0}
.section-head{margin-bottom:26px}
.section-head h2{font-size:clamp(22px,2.4vw,28px);line-height:1.3}
.section-head p{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:60ch}
.rel-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.rel-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.rel-grid{grid-template-columns:repeat(3,1fr)}}
.rel-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#D6E4FA}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:#EDF2F9}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.rel-card:hover .rel-thumb img{transform:scale(1.04)}
.rel-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-badge{
  align-self:flex-start;
  font-size:12px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:3px 10px;
}
.rel-body h3{font-size:17px;line-height:1.5}
.rel-card:hover .rel-body h3{color:var(--brand)}
.rel-desc{font-size:14px;color:var(--ink-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-foot{font-size:13px;color:var(--ink-3);margin-top:auto;display:flex;align-items:center;gap:10px}

/* ============ 底部 CTA ============ */
.cta-strip{margin-top:56px;background:var(--brand-soft);border-top:1px solid #D6E4FA;border-bottom:1px solid #D6E4FA}
.cta-inner{
  display:flex;flex-direction:column;gap:20px;
  padding:34px 0;
}
@media (min-width:900px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:40px 0}}
.cta-inner h2{font-size:clamp(20px,2.2vw,26px);line-height:1.35}
.cta-inner p{margin-top:8px;font-size:15px;color:var(--ink-2);max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{background:#101A2B;color:#C7D2E2;margin-top:72px;padding:54px 0 22px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.site-footer .logo-mark{background:rgba(255,255,255,.08)}
.site-footer .logo-name{color:#fff}
.site-footer .logo-sub{color:#8FA3BF}
.footer-desc{font-size:14px;line-height:1.85;color:#9FB0C7;max-width:34em}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:12px}
.footer-link{display:block;font-size:14px;color:#C7D2E2;padding:6px 0}
.footer-link:hover{color:#8FB6EE}
.footer-contact li{font-size:14px;color:#C7D2E2;padding:5px 0}
.footer-contact strong{color:#fff;font-variant-numeric:tabular-nums}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
  margin-top:40px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:#8FA3BF;
}
.footer-bottom a{color:#8FA3BF}
.footer-bottom a:hover{color:#8FB6EE}

/* ============ 响应式导航 ============ */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:absolute;
    top:100%;left:0;right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:12px 20px 18px;
    background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:0 12px 24px rgba(22,32,46,.08);
  }
  .site-header.nav-open .main-nav{display:flex}
  .nav-link{height:46px;padding:0 14px;font-size:15px}
}
@media (max-width:639px){
  .logo-sub{display:none}
  .article-shell{padding-top:22px}
  .article-layout{gap:24px}
  .section{padding-top:44px}
  .cta-strip{margin-top:44px}
  .site-footer{margin-top:52px;padding-top:40px}
}

/* roulang page: category1 */
:root{
  --brand:#2B6CD4;
  --brand-dark:#1F55AC;
  --brand-light:#E8F0FE;
  --accent:#E4813C;
  --accent-light:#FDF0E6;
  --jade:#2E9C82;
  --jade-light:#E6F5F1;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E6EBF2;
  --text:#16202E;
  --text-2:#4A5568;
  --text-3:#8A94A6;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --shadow-sm:0 1px 2px rgba(22,32,46,.04), 0 10px 28px rgba(22,32,46,.06);
  --shadow-md:0 1px 2px rgba(22,32,46,.04), 0 16px 40px rgba(22,32,46,.10);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe 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);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  font-feature-settings:"tnum";
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;}
p{margin:0 0 16px;}
ul{margin:0;padding:0;list-style:none;}
.svg-sprite{position:absolute;width:0;height:0;overflow:hidden;}
.ic{width:18px;height:18px;display:block;flex:none;}
.ic-check{color:var(--jade);}
.ic-dash{color:#C4CDDB;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:768px){
  .container{padding:0 32px;}
}

/* ---------- 顶部信息条 ---------- */
.info-bar{
  background:var(--brand-light);
  font-size:13px;
  color:var(--text-2);
  border-bottom:1px solid #DCE7F8;
}
.info-bar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  min-height:38px;
  flex-wrap:wrap;
}
.info-left{display:flex;align-items:center;gap:8px;}
.info-left::before{
  content:"";
  width:7px;height:7px;border-radius:50%;
  background:var(--jade);
  flex:none;
}
.info-right{display:flex;align-items:center;gap:16px;}
.info-phone{color:var(--text-2);}
.info-link{
  color:var(--brand);
  font-weight:600;
  padding-bottom:1px;
  border-bottom:1px dashed rgba(43,108,212,.5);
  transition:color .18s ease;
}
.info-link:hover{color:var(--brand-dark);}
@media (max-width:640px){
  .info-left{font-size:12px;}
  .info-phone{display:none;}
}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-stuck{box-shadow:0 8px 20px rgba(22,32,46,.08);}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:68px;
}
.logo{display:flex;align-items:center;gap:10px;flex:none;}
.logo-mark{
  width:38px;height:38px;border-radius:var(--r-md);
  background:var(--brand-light);
  display:flex;align-items:center;justify-content:center;
  flex:none;
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-name{font-size:19px;font-weight:700;letter-spacing:.5px;}
.logo-sub{font-size:12px;color:var(--text-3);font-weight:400;}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:8px;
  flex:1;
}
.nav-link{
  position:relative;
  padding:9px 14px;
  border-radius:999px;
  font-size:15px;
  color:var(--text-2);
  transition:background .18s ease, color .18s ease;
}
.nav-link:hover{background:var(--brand-light);color:var(--brand-dark);}
.nav-link.active{color:var(--brand);font-weight:600;background:var(--brand-light);}
.nav-link:focus-visible{outline:3px solid rgba(43,108,212,.28);outline-offset:2px;}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto;flex:none;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);
  background:#fff;
  border-radius:var(--r-md);
  cursor:pointer;
  transition:border-color .18s ease,background .18s ease;
}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-light);}
.nav-close{
  display:none;
  position:absolute;top:18px;right:18px;
  width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-md);
  background:#fff;cursor:pointer;align-items:center;justify-content:center;
}
.drawer-foot{display:none;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--r-md);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .16s ease, background .18s ease, box-shadow .18s ease, border-color .18s ease, color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(43,108,212,.22);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 10px 22px rgba(43,108,212,.28);}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(43,108,212,.2);}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand);}
.btn-ghost:hover{background:var(--brand-light);transform:translateY(-1px);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(228,129,60,.24);}
.btn-accent:hover{background:#CF6F2C;transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:var(--r-sm);}
.btn:focus-visible{outline:3px solid rgba(43,108,212,.28);outline-offset:2px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-weight:600;font-size:15px;
}
.text-link::after{content:"→";transition:transform .18s ease;}
.text-link:hover{color:var(--brand-dark);}
.text-link:hover::after{transform:translateX(3px);}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:18px 0 0;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--text-3);}
.breadcrumb li{display:flex;align-items:center;gap:6px;}
.breadcrumb li+li::before{content:"/";color:#C4CDDB;}
.breadcrumb a{color:var(--text-3);transition:color .18s ease;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .current{color:var(--brand);font-weight:600;}

/* ---------- 页头区 ---------- */
.page-hero{padding:28px 0 8px;}
.page-hero-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
  align-items:center;
}
.hero-copy h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.18;
  letter-spacing:-.5px;
  margin-bottom:16px;
}
.hero-copy h1 em{
  font-style:normal;
  color:var(--brand);
}
.hero-lead{
  font-size:16px;
  color:var(--text-2);
  max-width:620px;
  margin-bottom:22px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.hero-figure{
  position:relative;
  border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  aspect-ratio:16/10;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(22,32,46,0) 45%,rgba(22,32,46,.34) 100%);
}
.hero-caption{
  position:absolute;
  left:18px;bottom:16px;right:18px;
  color:#fff;
  font-size:14px;
  z-index:2;
  display:flex;align-items:center;gap:8px;
}
.hero-caption .dot{width:7px;height:7px;border-radius:50%;background:var(--jade);flex:none;}
@media (min-width:1024px){
  .page-hero-grid{grid-template-columns:56% 44%;gap:40px;}
}

/* ---------- 锚点胶囊条 ---------- */
.anchor-bar{
  margin-top:34px;
  padding:16px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.anchor-list{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding-bottom:4px;
  scrollbar-width:thin;
}
.anchor-list a{
  flex:none;
  padding:8px 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:#fff;
  font-size:14px;
  color:var(--text-2);
  transition:all .18s ease;
}
.anchor-list a:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-light);}
.anchor-list a.is-current{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0;}
.section-head{max-width:760px;margin-bottom:32px;}
.section-tag{
  display:inline-block;
  padding:4px 12px;
  border-radius:999px;
  background:var(--brand-light);
  color:var(--brand);
  font-size:12px;
  font-weight:600;
  letter-spacing:.4px;
  margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.28;
  margin-bottom:12px;
}
.section-head p{color:var(--text-2);font-size:16px;margin-bottom:0;}
@media (min-width:768px){
  .section{padding:88px 0;}
}
@media (min-width:1024px){
  .section{padding:96px 0;}
}

/* ---------- 卡片 ---------- */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:transform .2s ease, box-shadow .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);}
.card-body{padding:22px;}
.card-body h3{font-size:19px;line-height:1.4;margin-bottom:10px;}
.card-body p{font-size:15px;color:var(--text-2);margin-bottom:14px;}
.card-media{aspect-ratio:16/9;overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px;}
.tag{
  display:inline-block;
  padding:3px 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  background:var(--brand-light);
  color:var(--brand-dark);
}
.tag-accent{background:var(--accent-light);color:#A95A1C;}
.tag-jade{background:var(--jade-light);color:#1E735F;}

/* 非对称网格：左大右小 */
.split-grid{display:grid;grid-template-columns:1fr;gap:20px;}
.split-side{display:grid;gap:20px;}
@media (min-width:900px){
  .split-grid{grid-template-columns:58% 42%;align-items:start;}
}
.spot-list{display:grid;gap:12px;margin-top:6px;}
.spot-list li{
  display:flex;gap:10px;font-size:15px;color:var(--text-2);
  padding-left:2px;
}
.spot-list li::before{
  content:"";
  flex:none;
  width:6px;height:6px;border-radius:50%;
  background:var(--brand);
  margin-top:11px;
}

/* 阶梯错位卡 */
.stair-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:900px){
  .stair-grid{grid-template-columns:repeat(3,1fr);align-items:start;}
  .stair-grid > *:nth-child(2){margin-top:34px;}
  .stair-grid > *:nth-child(3){margin-top:68px;}
}
.stair-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 22px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease;
}
.stair-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);}
.stair-num{
  font-size:34px;font-weight:700;color:var(--brand-light);
  line-height:1;letter-spacing:-1px;margin-bottom:10px;
  font-variant-numeric:tabular-nums;
}
.stair-card h3{font-size:20px;margin-bottom:10px;}
.stair-card.is-recommend{border-color:var(--brand);box-shadow:0 10px 30px rgba(43,108,212,.14);}
.stair-card.is-recommend .stair-num{color:rgba(43,108,212,.28);}

/* 时间轴 */
.timeline{
  display:grid;grid-template-columns:1fr;gap:0;
  border-top:1px solid var(--line);
}
.timeline-item{
  position:relative;
  padding:22px 0 22px 34px;
  border-bottom:1px dashed var(--line);
}
.timeline-item::before{
  content:"";
  position:absolute;left:0;top:30px;
  width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--brand);
}
.timeline-item h3{font-size:18px;margin-bottom:6px;}
.timeline-item p{margin-bottom:0;color:var(--text-2);font-size:15px;}
.timeline-step{
  font-size:12px;font-weight:700;color:var(--brand);
  letter-spacing:1px;margin-bottom:6px;display:block;
}
@media (min-width:900px){
  .timeline{grid-template-columns:repeat(4,1fr);gap:24px;border-top:none;}
  .timeline-item{
    padding:30px 0 0;
    border-bottom:none;
    border-top:2px dashed var(--line);
  }
  .timeline-item::before{top:-8px;left:0;}
}

/* ---------- 表格 ---------- */
.table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-sm);overflow:hidden;
}
.table-scroll{overflow-x:auto;}
table.compare{width:100%;border-collapse:collapse;min-width:720px;}
table.compare th,
table.compare td{
  padding:15px 18px;
  text-align:left;
  font-size:15px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
table.compare thead th{
  background:var(--brand-light);
  color:var(--brand-dark);
  font-size:14px;
  font-weight:700;
  letter-spacing:.3px;
}
table.compare thead th:first-child{color:var(--text);}
table.compare tbody tr:nth-child(even){background:#FAFCFF;}
table.compare tbody td:first-child{font-weight:600;color:var(--text);}
table.compare tbody tr:last-child td{border-bottom:none;}
.col-rec{position:relative;background:rgba(43,108,212,.06)!important;}
.col-rec::after{
  content:"";
  position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand);
}
th .rec-badge{
  display:inline-block;margin-left:8px;padding:2px 8px;border-radius:999px;
  background:var(--accent);color:#fff;font-size:11px;font-weight:600;
  vertical-align:middle;
}
.table-note{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  padding:16px 18px;border-top:1px solid var(--line);background:#fff;
  font-size:13px;color:var(--text-3);
}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item[open]{border-left:4px solid var(--brand);box-shadow:var(--shadow-sm);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;
  font-size:17px;font-weight:600;color:var(--text);
  cursor:pointer;list-style:none;
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q:hover{color:var(--brand-dark);}
.faq-q:focus-visible{outline:3px solid rgba(43,108,212,.28);outline-offset:-3px;}
.faq-ic{width:18px;height:18px;color:var(--brand);flex:none;transition:transform .2s ease;}
.faq-ic .vline{transition:opacity .2s ease;}
.faq-item[open] .faq-ic .vline{opacity:0;}
.faq-a{
  padding:0 22px 20px;
  font-size:15px;color:var(--text-2);line-height:1.85;
  max-width:760px;
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-light);
  border-radius:var(--r-xl);
  padding:34px 26px;
  margin:0 auto;
}
.cta-grid{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3;margin-bottom:12px;}
.cta-band p{color:var(--text-2);margin-bottom:16px;}
.cta-points{display:grid;gap:10px;}
.cta-points li{display:flex;gap:10px;font-size:15px;color:var(--text-2);}
.cta-points li::before{
  content:"";flex:none;width:6px;height:6px;border-radius:50%;
  background:var(--jade);margin-top:11px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
@media (min-width:1024px){
  .cta-band{padding:48px 48px;}
  .cta-grid{grid-template-columns:1.25fr .75fr;}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#101A2B;
  color:#C9D3E2;
  padding:56px 0 24px;
  margin-top:72px;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:32px;
  padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.1);
}
@media (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,1fr);}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .logo-mark{background:rgba(143,182,238,.14);}
.footer-brand .logo-name{color:#fff;}
.footer-brand .logo-sub{color:#8FA1BA;}
.footer-desc{font-size:14px;color:#93A3BC;max-width:320px;margin:0;}
.footer-title{font-size:15px;color:#fff;margin-bottom:14px;font-weight:600;}
.footer-link{
  display:block;font-size:14px;color:#93A3BC;padding:5px 0;
  transition:color .18s ease,transform .18s ease;
}
.footer-link:hover{color:#fff;transform:translateX(2px);}
.footer-contact{display:grid;gap:9px;font-size:14px;color:#93A3BC;}
.footer-contact strong{color:#fff;font-weight:600;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  padding-top:20px;font-size:13px;color:#7C8CA6;
}
.footer-bottom a{color:#9FB4D4;}
.footer-bottom a:hover{color:#fff;}

/* ---------- 移动端抽屉 ---------- */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex;}
  .nav-close{display:flex;}
  .main-nav{
    position:fixed;top:0;right:0;
    width:min(330px,88vw);height:100vh;
    background:#fff;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:76px 22px 32px;
    margin:0;
    transform:translateX(102%);
    transition:transform .28s ease;
    box-shadow:-14px 0 36px rgba(22,32,46,.14);
    z-index:80;
    overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{padding:13px 14px;border-radius:var(--r-md);font-size:16px;}
  .drawer-foot{
    display:block;margin-top:18px;padding-top:18px;
    border-top:1px solid var(--line);
  }
  .drawer-foot .btn{width:100%;margin-bottom:10px;}
  .drawer-foot .drawer-note{font-size:13px;color:var(--text-3);}
  body.nav-open{overflow:hidden;}
}
@media (min-width:1024px){
  .nav-close{display:none;}
  .drawer-foot{display:none;}
}

/* roulang page: category2 */
:root{
  --brand:#2B6CD4;
  --brand-deep:#1F55AC;
  --brand-soft:#E8F0FE;
  --accent:#E4813C;
  --accent-soft:#FDF0E6;
  --jade:#2E9C82;
  --jade-soft:#E7F5F1;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E6EBF2;
  --ink:#16202E;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --sh-1:0 1px 2px rgba(22,32,46,.04),0 10px 28px rgba(22,32,46,.06);
  --sh-2:0 1px 2px rgba(22,32,46,.05),0 16px 36px rgba(22,32,46,.10);
  --gap-sm:16px;
  --gap-md:24px;
  --sect-m:56px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:var(--brand-soft);color:var(--brand-deep)}
:focus-visible{outline:3px solid rgba(43,108,212,.35);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:768px){.container{padding-left:32px;padding-right:32px}}

/* ===== 顶部信息条 ===== */
.topbar{background:#F1F5FB;border-bottom:1px solid var(--line);font-size:13px;color:var(--ink-2)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px;flex-wrap:wrap}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0}
.topbar-domain{color:var(--brand-deep);font-weight:600;letter-spacing:.3px}
.topbar-note{color:var(--ink-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:14px}
.topbar-phone{color:var(--ink-2);font-weight:600}
.topbar-phone:hover{color:var(--brand)}
.topbar-cta{color:var(--brand);font-weight:600;border-bottom:1px dashed rgba(43,108,212,.5);padding-bottom:1px}
.topbar-cta:hover{color:var(--brand-deep);border-bottom-style:solid}
@media (max-width:639px){.topbar-note{display:none}}

/* ===== 主导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:0 8px 20px rgba(22,32,46,.08)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:11px;background:var(--brand-soft);flex-shrink:0}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-name{font-size:19px;font-weight:700;letter-spacing:.5px;color:var(--ink)}
.logo-sub{font-size:12px;color:var(--ink-3);letter-spacing:.2px}
.main-nav{display:none;align-items:center;gap:6px}
@media (min-width:1024px){.main-nav{display:flex}}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  border-radius:999px;font-size:15px;color:var(--ink-2);font-weight:500;
  transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--brand-deep);background:var(--brand-soft)}
.nav-link.active{color:var(--brand-deep);background:var(--brand-soft);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:16px;height:2px;border-radius:2px;background:var(--brand);
}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;
  transition:border-color .2s ease,background-color .2s ease;
}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft)}
@media (min-width:1024px){.nav-toggle{display:none}}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(43,108,212,.22)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 10px 22px rgba(31,85,172,.26)}
.btn-ghost{background:#fff;color:var(--brand-deep);border-color:rgba(43,108,212,.45)}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(228,129,60,.24)}
.btn-accent:hover{background:#D2722F;transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--brand-deep);font-weight:600;font-size:15px}
.btn-text .arrow{transition:transform .2s ease}
.btn-text:hover .arrow{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}

/* ===== 徽章 / 标签 ===== */
.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 11px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.7}
.badge-soft{background:var(--brand-soft);color:var(--brand-deep)}
.badge-accent{background:var(--accent-soft);color:#B65F1E}
.badge-jade{background:var(--jade-soft);color:#1F7460}
.dot{width:7px;height:7px;border-radius:50%;background:var(--jade);flex-shrink:0}
.dot-accent{background:var(--accent)}

/* ===== 移动抽屉 ===== */
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,26,43,.45);opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;height:100%;width:300px;max-width:86vw;background:#fff;z-index:80;
  transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;padding:20px;gap:18px;box-shadow:-10px 0 30px rgba(16,26,43,.16);
  overflow-y:auto;
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;display:inline-flex;align-items:center;justify-content:center}
.drawer-close:hover{background:var(--brand-soft);border-color:var(--brand)}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-link{padding:12px 14px;border-radius:var(--r-md);font-size:15px;color:var(--ink-2);font-weight:500;background:#FAFCFF}
.drawer-link:hover{background:var(--brand-soft);color:var(--brand-deep)}
.drawer-link.active{background:var(--brand-soft);color:var(--brand-deep);font-weight:700}
.drawer-cta{width:100%}
.drawer-info{border-top:1px dashed var(--line);padding-top:14px;font-size:13px;color:var(--ink-3);line-height:1.9}

/* ===== 面包屑 ===== */
.breadcrumb{padding-top:16px;font-size:13px;color:var(--ink-3);display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C6CFDC}
.breadcrumb .current{color:var(--brand-deep);font-weight:600}

/* ===== 页头区 ===== */
.page-head{padding-top:22px;padding-bottom:8px}
.page-head-grid{display:grid;gap:28px;align-items:start}
@media (min-width:1024px){.page-head-grid{grid-template-columns:minmax(0,1.25fr) minmax(0,.95fr);gap:44px;align-items:center}}
.page-head h1{
  font-size:clamp(28px,4vw,44px);line-height:1.18;font-weight:700;letter-spacing:-.4px;
}
.page-head h1 .hl{color:var(--brand)}
.page-lead{margin-top:16px;color:var(--ink-2);font-size:16px;max-width:36em}
.page-head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.wave-line{margin-top:22px;height:12px;width:180px;opacity:.8}

/* 三格数据条 */
.stat-bar{
  display:grid;grid-template-columns:repeat(3,1fr);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden;
}
.stat-cell{padding:20px 16px;text-align:center;border-right:1px dashed var(--line)}
.stat-cell:last-child{border-right:0}
.stat-num{font-size:clamp(22px,3vw,30px);font-weight:700;color:var(--brand-deep);line-height:1.2}
.stat-num small{font-size:14px;font-weight:600;margin-left:2px;color:var(--brand)}
.stat-label{font-size:13px;color:var(--ink-3);margin-top:6px}
.stat-note{margin-top:14px;font-size:13px;color:var(--ink-3)}
@media (max-width:520px){
  .stat-bar{grid-template-columns:1fr}
  .stat-cell{border-right:0;border-bottom:1px dashed var(--line)}
  .stat-cell:last-child{border-bottom:0}
}

/* ===== 主体：左粘性目录 + 右内容流 ===== */
.flow-layout{display:block;padding-top:var(--sect-m)}
@media (min-width:1024px){
  .flow-layout{display:grid;grid-template-columns:264px minmax(0,1fr);gap:48px;padding-top:88px;align-items:start}
}
.toc-col{margin-bottom:28px}
@media (min-width:1024px){
  .toc-col{margin-bottom:0;position:sticky;top:96px}
}
.toc-box{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:18px;
}
.toc-title{font-size:13px;font-weight:700;letter-spacing:1px;color:var(--ink-3);text-transform:uppercase}
.toc-list{margin-top:12px;display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;scrollbar-width:thin}
@media (min-width:1024px){
  .toc-list{flex-direction:column;gap:2px;overflow:visible;margin-top:14px}
}
.toc-link{
  display:block;white-space:nowrap;padding:8px 12px;border-radius:10px;font-size:14px;color:var(--ink-2);
  border-left:3px solid transparent;transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.toc-link:hover{background:var(--brand-soft);color:var(--brand-deep)}
.toc-link.active{background:var(--brand-soft);color:var(--brand-deep);font-weight:700;border-left-color:var(--brand)}
@media (max-width:1023px){
  .toc-link{border-left:0;border:1px solid var(--line);border-radius:999px;font-size:13px;padding:7px 14px;background:#fff}
  .toc-link.active{border-color:var(--brand)}
}
.toc-help{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line);font-size:13px;color:var(--ink-3);line-height:1.9}
@media (max-width:1023px){.toc-help{display:none}}

/* 内容流 */
.flow-col{min-width:0}
.flow-section{
  scroll-margin-top:110px;
  padding-bottom:34px;
  border-bottom:1px dashed #D8E1EC;
  margin-bottom:34px;
}
.flow-section:last-of-type{border-bottom:0;margin-bottom:0}
.flow-section h2{
  font-size:clamp(22px,2.5vw,30px);line-height:1.3;font-weight:700;letter-spacing:-.2px;
}
.flow-section h2 .num{
  display:inline-block;min-width:34px;color:var(--brand);font-size:15px;font-weight:700;
  letter-spacing:1px;vertical-align:middle;margin-right:6px;
}
.flow-desc{margin-top:12px;color:var(--ink-2);max-width:44em}
.flow-figure{margin-top:20px;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);background:#fff}
.flow-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.flow-figure figcaption{font-size:13px;color:var(--ink-3);padding:10px 14px;border-top:1px solid var(--line);background:#fff}
.point-list{margin-top:20px;display:grid;gap:10px}
@media (min-width:768px){.point-list{grid-template-columns:1fr 1fr}}
.point-list li{
  position:relative;padding:12px 16px 12px 40px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);font-size:15px;color:var(--ink-2);
}
.point-list li::before{
  content:"";position:absolute;left:16px;top:20px;width:9px;height:9px;border-radius:3px;
  background:var(--brand-soft);border:1.5px solid var(--brand);
}
.point-list li:nth-child(3n)::before{background:var(--accent-soft);border-color:var(--accent)}
.point-list li:nth-child(2n)::before{background:var(--jade-soft);border-color:var(--jade)}

/* 三步行进卡 */
.steps{margin-top:var(--sect-m)}
.steps-head h2{font-size:clamp(22px,2.5vw,30px);font-weight:700;line-height:1.3}
.steps-head p{margin-top:10px;color:var(--ink-2);max-width:44em}
.steps-grid{margin-top:24px;display:grid;gap:18px}
@media (min-width:768px){.steps-grid{grid-template-columns:repeat(3,1fr)}}
.step-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;
  box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease;
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.step-num{font-size:26px;font-weight:700;color:var(--brand-soft);letter-spacing:1px;line-height:1}
.step-card h3{margin-top:12px;font-size:19px;font-weight:600}
.step-card p{margin-top:8px;font-size:14px;color:var(--ink-2)}
.step-card .badge{margin-top:14px}
@media (max-width:767px){.step-card{padding:20px}}

/* ===== FAQ ===== */
.faq-block{margin-top:var(--sect-m)}
.faq-block h2{font-size:clamp(22px,2.5vw,30px);font-weight:700;line-height:1.3}
.faq-block .faq-intro{margin-top:10px;color:var(--ink-2);max-width:44em}
.faq-list{margin-top:24px;display:grid;gap:12px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item:hover{border-color:#D3DEEE}
.faq-item[open]{box-shadow:var(--sh-1);border-color:#D3DEEE}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 52px 18px 20px;position:relative;
  font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:400;color:var(--brand);line-height:1;
}
.faq-item[open] summary::after{content:"−"}
.faq-item summary:hover{color:var(--brand-deep)}
.faq-answer{padding:0 20px 18px;position:relative}
.faq-answer::before{
  content:"";position:absolute;left:20px;top:2px;bottom:22px;width:4px;border-radius:3px;background:var(--brand);opacity:.85;
}
.faq-answer p{padding-left:20px;font-size:15px;color:var(--ink-2)}
@media (max-width:520px){
  .faq-item summary{font-size:16px;padding:16px 44px 16px 16px}
  .faq-answer{padding:0 16px 16px}
  .faq-answer::before{left:16px}
  .faq-answer p{padding-left:18px}
}

/* ===== CTA ===== */
.cta-band{
  margin-top:var(--sect-m);
  background:linear-gradient(180deg,#EFF5FE 0%,#E8F0FE 100%);
  border:1px solid #D8E5FA;border-radius:var(--r-xl);
  padding:32px 24px;position:relative;overflow:hidden;
}
@media (min-width:768px){.cta-band{padding:44px 40px}}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  border:1px dashed rgba(43,108,212,.28);
}
.cta-grid{position:relative;z-index:1;display:grid;gap:24px}
@media (min-width:900px){.cta-grid{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:center}}
.cta-band h2{font-size:clamp(22px,2.5vw,30px);font-weight:700;line-height:1.3;color:#123C7E}
.cta-band .cta-points{margin-top:14px;display:grid;gap:8px}
.cta-band .cta-points li{position:relative;padding-left:22px;font-size:15px;color:#2B4A78}
.cta-band .cta-points li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;
  background:#fff;border:2px solid var(--brand);
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-actions .btn{min-width:44px}
.cta-note{margin-top:14px;font-size:13px;color:#4B638A}
.back-link{margin-top:22px;display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:center;font-size:14px}
.back-link a{color:var(--ink-3)}
.back-link a:hover{color:var(--brand-deep)}

/* ===== 页脚 ===== */
.site-footer{margin-top:72px;background:#101A2B;color:#C7D1E0;padding:52px 0 26px;font-size:14px}
.footer-grid{display:grid;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:28px}}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .logo-mark{background:rgba(143,182,238,.12)}
.footer-brand .logo-name{color:#fff;font-size:18px;font-weight:700}
.footer-brand .logo-sub{color:#8FA3BE;font-size:12px}
.footer-desc{margin-top:14px;color:#93A3BA;font-size:13.5px;line-height:1.9;max-width:34em}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.4px}
.footer-link{display:block;color:#A9B7CB;font-size:13.5px;padding:5px 0;transition:color .2s ease,transform .2s ease}
.footer-link:hover{color:#fff;transform:translateX(2px)}
.footer-contact li{color:#A9B7CB;font-size:13.5px;padding:4px 0}
.footer-contact strong{color:#fff;font-weight:600}
.footer-bottom{
  margin-top:32px;padding-top:18px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#8FA3BE;
}
.footer-bottom a{color:#8FB6EE}
.footer-bottom a:hover{color:#fff}
@media (max-width:767px){
  .site-footer{padding:40px 0 22px;margin-top:56px}
  .flow-section{padding-bottom:26px;margin-bottom:26px}
  :root{--sect-m:44px}
}