/* roulang page: index */
:root{
  --brand:#2F6FB0;
  --brand-deep:#1B4A76;
  --brand-soft:#EAF1F8;
  --accent:#E0A33C;
  --ok:#2E8F72;
  --warn:#C4622D;
  --bg:#F6F8FB;
  --bg-deep:#EEF3F9;
  --surface:#FFFFFF;
  --line:#DCE5EF;
  --ink:#16222E;
  --ink-2:#5A6B7C;
  --ink-3:#8A98A6;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(27,74,118,.06);
  --sh-2:0 6px 18px rgba(27,74,118,.08);
  --sh-3:0 14px 36px rgba(27,74,118,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sec-gap:88px;
  --bs-primary:#2F6FB0;
  --bs-body-bg:#F6F8FB;
  --bs-body-color:#16222E;
  --bs-border-color:#DCE5EF;
  --bs-border-radius:14px;
  --bs-link-color:#2F6FB0;
  --bs-link-hover-color:#1B4A76;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:17px;line-height:1.8;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand-deep);}
button,input{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--brand-deep);font-weight:700;line-height:1.35;letter-spacing:.2px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ===== 按钮体系 ===== */
.btn-brand,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:16px;font-weight:600;
  cursor:pointer;white-space:nowrap;transition:all .18s var(--ease);
}
.btn-brand{background:var(--brand);color:#fff;border:1px solid var(--brand);box-shadow:var(--sh-1);}
.btn-brand:hover{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-brand:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.16);}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand-deep);color:var(--brand-deep);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm-x{height:40px;padding:0 18px;font-size:15px;}
.btn-block{width:100%;}
.link-more{font-size:15px;font-weight:600;color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.link-more:hover{color:var(--brand-deep);text-decoration-thickness:2px;}

/* ===== 头部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);transition:box-shadow .2s var(--ease),background .2s var(--ease);
}
.site-header.is-scrolled{background:rgba(255,255,255,.86);backdrop-filter:blur(6px);box-shadow:var(--sh-2);}
.nav-top{display:flex;align-items:center;gap:24px;height:64px;transition:height .2s var(--ease);}
.site-header.is-scrolled .nav-top{height:56px;}
.nav-brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:38px;height:38px;border-radius:12px;background:linear-gradient(160deg,var(--brand),var(--brand-deep));
  display:flex;align-items:center;justify-content:center;box-shadow:var(--sh-1);flex:0 0 auto;
}
.logo-mark svg{width:20px;height:20px;stroke:#fff;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round;}
.brand-text{font-size:17px;font-weight:700;color:var(--brand-deep);letter-spacing:.3px;white-space:nowrap;}
.search-wrap{
  position:relative;flex:1 1 auto;max-width:600px;margin:0 auto;display:flex;align-items:center;
  height:46px;background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  padding-left:44px;padding-right:4px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.search-wrap:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(47,111,176,.14);transform:scale(1.01);}
.search-ico{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:18px;height:18px;stroke:var(--ink-3);stroke-width:2;fill:none;stroke-linecap:round;}
.search-input{flex:1 1 auto;height:100%;border:0;outline:0;background:transparent;font-size:15px;color:var(--ink);min-width:0;}
.search-input::placeholder{color:var(--ink-3);}
.search-submit{
  flex:0 0 auto;height:36px;padding:0 20px;border:0;border-radius:var(--r-pill);background:var(--brand);
  color:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:background .18s var(--ease);
}
.search-submit:hover{background:var(--brand-deep);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.pill-row{display:flex;gap:8px;overflow-x:auto;padding:0 0 10px;scrollbar-width:none;-ms-overflow-style:none;}
.pill-row::-webkit-scrollbar{display:none;}
.pill{
  flex:0 0 auto;display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-deep);font-size:14px;font-weight:500;
  border:1px solid transparent;transition:all .18s var(--ease);
}
.pill:hover{background:#DCE9F6;border-color:#C3D9EC;color:var(--brand-deep);}
.pill.is-active{background:var(--brand);color:#fff;border-color:var(--brand);}

/* ===== 板块通用 ===== */
.section{padding:var(--sec-gap) 0;}
.section-alt{background:var(--surface);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.sec-kicker{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:1.4px;text-transform:uppercase;
  color:var(--brand);background:var(--brand-soft);border-radius:var(--r-pill);padding:3px 12px;margin-bottom:12px;
}
.section-title{font-size:28px;line-height:1.35;}
.section-sub{margin-top:10px;font-size:16px;color:var(--ink-2);max-width:720px;}

/* ===== Hero ===== */
.hero{position:relative;padding:72px 0 80px;background:linear-gradient(180deg,#F2F7FC 0%,var(--bg) 100%);overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-deep);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);padding:6px 14px;box-shadow:var(--sh-1);
}
.hero-eyebrow i{color:var(--accent);font-size:12px;}
.hero-title{font-size:38px;line-height:1.3;margin:20px 0 16px;}
.hero-sub{font-size:17px;line-height:1.85;color:var(--ink-2);max-width:560px;}
.trust-row{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 30px;}
.trust-item{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-pill);box-shadow:var(--sh-1);
}
.trust-item .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);flex:0 0 auto;}
.trust-item .t-label{font-size:14px;color:var(--ink-2);}
.trust-item .t-num{font-size:14px;font-weight:700;color:var(--brand-deep);font-variant-numeric:tabular-nums;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;}
.hero-media-wrap{position:relative;padding:0 16px 16px 0;}
.hero-media-wrap::after{
  content:"";position:absolute;right:0;bottom:0;width:72%;height:72%;
  border-right:1px solid #BFD5EA;border-bottom:1px solid #BFD5EA;border-radius:0 0 var(--r-lg) 0;
}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-3);background:var(--brand-soft);}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-corner{position:absolute;left:0;bottom:0;width:64px;height:64px;background:var(--brand-soft);border-radius:0 var(--r-lg) 0 var(--r-lg);z-index:2;}

/* ===== 内容卡片 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);color:inherit;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#C7DAEB;color:inherit;}
.card-media{position:relative;background:var(--brand-soft);}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s var(--ease);}
.news-card:hover .card-media img{transform:scale(1.03);}
.card-badge{
  position:absolute;left:12px;top:12px;font-size:12px;font-weight:600;color:var(--brand-deep);
  background:rgba(255,255,255,.94);border-radius:var(--r-pill);padding:3px 11px;box-shadow:var(--sh-1);
}
.card-body{display:flex;flex-direction:column;gap:10px;padding:18px 18px 20px;flex:1 1 auto;}
.card-title{
  font-size:18px;line-height:1.5;color:var(--brand-deep);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-sum{
  font-size:14px;line-height:1.75;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{display:flex;align-items:center;gap:8px;margin-top:auto;font-size:13px;color:var(--ink-3);}
.card-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-3);}
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:48px 24px;text-align:center;color:var(--ink-2);background:var(--surface);
  border:1px dashed var(--line);border-radius:var(--r-md);
}
.empty-state svg{width:34px;height:34px;stroke:var(--brand);stroke-width:1.6;fill:none;stroke-linecap:round;stroke-linejoin:round;}
.empty-state p{font-size:15px;}

/* ===== 权益表 ===== */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);box-shadow:var(--sh-1);}
.benefit-table{width:100%;min-width:760px;border-collapse:separate;border-spacing:0;font-size:15px;}
.benefit-table th,.benefit-table td{padding:15px 18px;text-align:center;border-bottom:1px solid var(--line);}
.benefit-table thead th{
  position:sticky;top:0;z-index:3;background:var(--brand-soft);color:var(--brand-deep);
  font-weight:700;font-size:15px;white-space:nowrap;
}
.benefit-table thead th.col-name{z-index:5;text-align:left;}
.benefit-table td.col-name,.benefit-table th.col-name{
  position:sticky;left:0;z-index:4;text-align:left;background:var(--surface);
  color:var(--ink);font-weight:500;min-width:190px;
}
.benefit-table thead th.col-name{background:var(--brand-soft);}
.benefit-table tbody tr:nth-child(even) td{background:#FBFDFF;}
.benefit-table tbody tr:nth-child(even) td.col-name{background:#FBFDFF;}
.benefit-table tbody tr:hover td{background:#F3F8FD;}
.benefit-table tbody tr:last-child td{border-bottom:0;}
.col-rec{background:#DCEAF7 !important;position:relative;}
.benefit-table thead th.col-rec{background:#CFE2F3 !important;}
.rec-tag{
  display:inline-block;margin-left:8px;font-size:11px;font-weight:700;color:#7A5A12;
  background:#FBEBCB;border:1px solid var(--accent);border-radius:var(--r-pill);padding:1px 9px;vertical-align:middle;
}
.yes{
  display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;
  background:var(--brand);color:#fff;font-size:12px;font-weight:700;
}
.no{display:inline-block;width:14px;height:2px;background:#C6D2DE;border-radius:2px;vertical-align:middle;}

/* ===== 等级亮点 ===== */
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.tier-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:30px 26px 26px;box-shadow:var(--sh-1);display:flex;flex-direction:column;gap:18px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.tier-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.tier-card.is-top{border:1px solid var(--accent);box-shadow:var(--sh-3);padding-top:42px;margin-top:-20px;padding-bottom:32px;}
.ribbon{
  position:absolute;right:18px;top:-13px;background:var(--accent);color:#fff;font-size:12px;font-weight:700;
  padding:4px 14px;border-radius:var(--r-pill);box-shadow:var(--sh-1);letter-spacing:.5px;
}
.tier-name{font-size:22px;color:var(--brand-deep);}
.tier-desc{font-size:15px;color:var(--ink-2);}
.tier-list{display:flex;flex-direction:column;gap:11px;}
.tier-list li{display:flex;gap:10px;font-size:15px;color:var(--ink-2);line-height:1.7;}
.tier-list i{color:var(--ok);font-size:13px;margin-top:7px;flex:0 0 auto;}
.tier-card .btn-brand,.tier-card .btn-ghost{margin-top:auto;}

/* ===== 专属内容 ===== */
.ex-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.ex-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.ex-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.ex-card .card-media img{aspect-ratio:16/9;}
.ex-body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:8px;}
.ex-title{font-size:16px;font-weight:600;color:var(--brand-deep);line-height:1.5;}
.ex-sum{font-size:14px;color:var(--ink-2);line-height:1.7;}
.ex-tag{font-size:12px;color:var(--brand);background:var(--brand-soft);border-radius:var(--r-pill);padding:2px 10px;align-self:flex-start;}
.lock{
  position:absolute;right:12px;top:12px;display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.94);border-radius:var(--r-pill);padding:4px 11px;box-shadow:var(--sh-1);
  font-size:12px;font-weight:600;color:var(--brand-deep);transition:all .18s var(--ease);
}
.lock svg{width:13px;height:13px;stroke:var(--brand);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round;}
.lock em{display:none;font-style:normal;}
.ex-card:hover .lock{background:var(--brand);}
.ex-card:hover .lock svg{display:none;}
.ex-card:hover .lock em{display:inline;color:#fff;}
.ex-foot{margin-top:28px;text-align:center;font-size:15px;color:var(--ink-2);}

/* ===== FAQ ===== */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion.faq-acc{display:flex;flex-direction:column;gap:12px;}
.faq-acc .accordion-item{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);box-shadow:var(--sh-1);overflow:hidden;}
.faq-acc .accordion-button{
  background:transparent;border:0;box-shadow:none;font-size:17px;font-weight:600;color:var(--brand-deep);
  padding:19px 22px;line-height:1.6;
}
.faq-acc .accordion-button:not(.collapsed){color:var(--brand);background:var(--brand-soft);}
.faq-acc .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-2px;}
.faq-acc .accordion-button::after{
  background-image:none;width:9px;height:9px;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);margin-top:-5px;transition:transform .2s var(--ease),margin .2s var(--ease);flex:0 0 auto;
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);margin-top:5px;}
.faq-acc .accordion-body{padding:4px 22px 22px;font-size:16px;line-height:1.85;color:var(--ink-2);}

/* ===== CTA ===== */
.cta-band{
  background:linear-gradient(120deg,#EAF3FB 0%,#D7E7F6 100%);
  border:1px solid #C9DEF0;border-radius:var(--r-lg);padding:46px 44px;box-shadow:var(--sh-1);
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-title{font-size:26px;color:var(--brand-deep);}
.cta-text{margin-top:10px;font-size:16px;color:var(--ink-2);max-width:640px;}
.cta-note{margin-top:22px;font-size:13px;color:var(--ink-3);border-top:1px solid #CBDDF0;padding-top:14px;}

/* ===== 页脚 ===== */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:60px 0 0;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-about{font-size:14px;line-height:1.85;color:var(--ink-2);max-width:340px;}
.foot-col h3{font-size:15px;color:var(--brand-deep);margin-bottom:16px;font-weight:700;}
.foot-list{display:flex;flex-direction:column;gap:11px;}
.foot-list a,.foot-list span{font-size:14px;color:var(--ink-2);line-height:1.7;}
.foot-list a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.foot-bottom{
  margin-top:48px;border-top:1px solid var(--line);padding:22px 0 28px;
  display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--ink-3);
}
.foot-bottom .row-line{display:flex;flex-wrap:wrap;gap:6px 18px;}

/* ===== 响应式 ===== */
@media (max-width:1399px){
  .container-x{max-width:1140px;}
}
@media (max-width:1199px){
  .hero-grid{grid-template-columns:6fr 6fr;gap:40px;}
  .hero-title{font-size:34px;}
  .ex-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991px){
  :root{--sec-gap:64px;}
  .nav-top{flex-wrap:wrap;height:auto;padding:10px 0;gap:14px;}
  .site-header.is-scrolled .nav-top{height:auto;}
  .nav-brand{order:1;}
  .nav-actions{order:2;margin-left:auto;}
  .search-wrap{order:3;flex-basis:100%;max-width:none;margin:2px 0 4px;height:44px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .tier-grid{grid-template-columns:1fr;gap:20px;}
  .tier-card.is-top{margin-top:0;padding-top:38px;}
  .section-title{font-size:24px;}
  .cta-band{padding:34px 26px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:767px){
  :root{--sec-gap:48px;}
  body{font-size:16px;line-height:1.85;}
  .container-x{padding:0 16px;}
  .hero{padding:44px 0 52px;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero-title{font-size:26px;}
  .hero-sub{font-size:16px;}
  .hero-cta .btn-brand,.hero-cta .btn-ghost{flex:1 1 100%;}
  .news-grid{grid-template-columns:1fr;}
  .ex-grid{grid-template-columns:1fr;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .faq-acc .accordion-button{font-size:16px;padding:16px 16px;}
  .faq-acc .accordion-body{padding:2px 16px 18px;}
  .foot-grid{grid-template-columns:1fr;}
  .cta-title{font-size:22px;}
  .benefit-table{font-size:14px;}
  .benefit-table th,.benefit-table td{padding:13px 14px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: article */
:root{
  --brand:#2F6FB0;
  --brand-deep:#1B4A76;
  --brand-soft:#EAF1F8;
  --accent:#E0A33C;
  --ok:#2E8F72;
  --warn:#C4622D;
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --line:#DCE5EF;
  --ink:#16222E;
  --ink-2:#5A6B7C;
  --ink-3:#8A98A6;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(27,74,118,.06);
  --sh-2:0 6px 18px rgba(27,74,118,.08);
  --sh-3:0 14px 36px rgba(27,74,118,.12);
  --ease:cubic-bezier(.2,.7,.3,1);

  --bs-primary:#2F6FB0;
  --bs-body-bg:#F6F8FB;
  --bs-body-color:#16222E;
  --bs-link-color:#2F6FB0;
  --bs-link-hover-color:#1B4A76;
  --bs-border-radius:12px;
  --bs-border-color:#DCE5EF;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  --bs-body-font-family:var(--bs-font-sans-serif);
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;text-underline-offset:3px;}
a:hover{color:var(--brand-deep);}
button,input{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

/* ============ HEADER / NAV ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease),backdrop-filter .2s var(--ease);
}
.site-header.is-stuck{
  box-shadow:var(--sh-2);
  backdrop-filter:blur(6px);
  background:rgba(255,255,255,.88);
}
.nav-top{
  display:flex;
  align-items:center;
  gap:20px;
  height:64px;
  transition:height .2s var(--ease);
}
.site-header.is-stuck .nav-top{height:56px;}

.nav-brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  text-decoration:none;
}
.logo-mark{
  width:34px;height:34px;
  border-radius:10px;
  background:var(--brand);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--sh-1);
  flex:0 0 auto;
}
.logo-mark svg{
  width:20px;height:20px;
  fill:none;stroke:#fff;
  stroke-width:1.8;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.brand-text{
  font-size:17px;
  font-weight:700;
  color:var(--brand-deep);
  letter-spacing:.2px;
  white-space:nowrap;
}

.search-wrap{
  position:relative;
  display:flex;
  align-items:center;
  flex:1 1 auto;
  max-width:600px;
  height:46px;
  margin:0 auto;
  padding:0 4px 0 42px;
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:999px;
  transition:box-shadow .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.search-wrap:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(47,111,176,.14);
  transform:scale(1.01);
}
.search-ico{
  position:absolute;
  left:16px;
  width:18px;height:18px;
  fill:none;stroke:var(--ink-3);
  stroke-width:1.8;
  stroke-linecap:round;
  stroke-linejoin:round;
  pointer-events:none;
}
.search-input{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  border:0;
  background:transparent;
  outline:none;
  font-size:15px;
  color:var(--ink);
}
.search-input::placeholder{color:var(--ink-3);}
.search-submit{
  flex:0 0 auto;
  height:38px;
  padding:0 20px;
  border:0;
  border-radius:999px;
  background:var(--brand);
  color:#fff;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:background .18s var(--ease);
}
.search-submit:hover{background:var(--brand-deep);}

.nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

.btn-brand{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  background:var(--brand);
  border:1.5px solid var(--brand);
  color:#fff;
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-brand:hover{
  background:var(--brand-deep);
  border-color:var(--brand-deep);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
}
.btn-brand:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.16);}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  background:#fff;
  border:1.5px solid var(--brand);
  color:var(--brand);
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn-ghost:hover{
  background:var(--brand-soft);
  border-color:var(--brand-deep);
  color:var(--brand-deep);
  transform:translateY(-2px);
}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px;}

.pill-row{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:0 0 10px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  -webkit-overflow-scrolling:touch;
}
.pill-row::-webkit-scrollbar{display:none;}
.pill{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 16px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--line);
  color:var(--ink-2);
  font-size:13.5px;
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.pill:hover{color:var(--brand);border-color:var(--brand);background:var(--brand-soft);}
.pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;}

/* ============ PAGE ============ */
.page-main{padding:32px 0 88px;}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-3);
  margin-bottom:26px;
}
.crumb a{color:var(--ink-3);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--line);}
.crumb .cur{color:var(--ink-2);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.article-shell{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:52px;
  align-items:start;
}
.article-main{min-width:0;}

.article-title{
  max-width:820px;
  margin:0 0 18px;
  font-size:36px;
  line-height:1.35;
  font-weight:700;
  color:var(--brand-deep);
  letter-spacing:.2px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  max-width:820px;
  padding-bottom:22px;
  border-bottom:1px solid var(--line);
  margin-bottom:32px;
  font-size:13.5px;
  color:var(--ink-3);
}
.badge-cat{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--brand-soft);
  border:1px solid rgba(47,111,176,.25);
  color:var(--brand-deep);
  font-size:12px;
  font-weight:600;
}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--line);}

.article-body{
  max-width:820px;
  font-size:17px;
  line-height:1.9;
  color:var(--ink);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;
  margin:40px 0 16px;
  padding-left:14px;
  font-size:24px;
  line-height:1.4;
  font-weight:600;
  color:var(--brand-deep);
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:.22em;
  width:4px;height:1em;
  border-radius:2px;
  background:var(--brand);
}
.article-body h3{
  margin:30px 0 12px;
  font-size:19px;
  line-height:1.45;
  font-weight:600;
  color:var(--brand-deep);
}
.article-body h4{
  margin:24px 0 10px;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
}
.article-body ul,
.article-body ol{
  margin:0 0 1.2em;
  padding-left:1.4em;
}
.article-body li{margin-bottom:.55em;line-height:1.85;}
.article-body blockquote{
  margin:24px 0;
  padding:16px 22px;
  background:var(--brand-soft);
  border-left:3px solid var(--brand);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--ink-2);
  font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  margin:26px auto;
  border-radius:var(--r-sm);
  box-shadow:var(--sh-1);
}
.article-body table{
  display:block;
  width:100%;
  margin:26px 0;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:15px;
}
.article-body th,
.article-body td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  text-align:left;
  white-space:nowrap;
}
.article-body th{
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-weight:600;
}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-deep);}
.article-body hr{border:0;border-top:1px solid var(--line);margin:34px 0;}

.tag-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  max-width:820px;
  margin-top:40px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.tag-row .tag-label{font-size:13px;color:var(--ink-3);}
.tag{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 14px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--line);
  color:var(--ink-2);
  font-size:12.5px;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.tag:hover{color:var(--brand);border-color:var(--brand);background:var(--brand-soft);}

.back-row{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  max-width:820px;
  margin-top:28px;
}
.disclaimer{
  max-width:820px;
  margin-top:28px;
  padding:16px 18px;
  border-radius:var(--r-sm);
  background:#fff;
  border:1px dashed var(--line);
  font-size:13px;
  line-height:1.85;
  color:var(--ink-3);
}

/* ============ ASIDE ============ */
.article-aside{position:sticky;top:96px;display:grid;gap:20px;}
.aside-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:22px;
  box-shadow:var(--sh-1);
}
.aside-card h3{
  margin:0 0 16px;
  font-size:15px;
  font-weight:600;
  color:var(--brand-deep);
  letter-spacing:.2px;
}
.aside-list{list-style:none;margin:0;padding:0;display:grid;gap:2px;}
.aside-list li a{
  display:block;
  padding:10px 12px;
  border-radius:var(--r-sm);
  color:var(--ink-2);
  font-size:14px;
  line-height:1.6;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.aside-list li a:hover{background:var(--brand-soft);color:var(--brand-deep);transform:translateX(3px);}
.aside-brand .foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.aside-brand p{margin:0;font-size:13.5px;line-height:1.85;color:var(--ink-3);}

/* ============ RELATED ============ */
.related{margin-top:72px;}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:28px;
}
.sec-head h2{
  margin:0;
  font-size:22px;
  font-weight:600;
  color:var(--brand-deep);
}
.sec-head .sec-link{font-size:14px;color:var(--brand);}
.sec-head .sec-link:hover{color:var(--brand-deep);}
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.rcard{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.rcard:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.rcard-thumb{
  position:relative;
  aspect-ratio:16/9;
  background:var(--brand-soft);
  overflow:hidden;
}
.rcard-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s var(--ease);
}
.rcard:hover .rcard-thumb img{transform:scale(1.03);}
.rcard-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rcard-body h3{
  margin:0;
  font-size:16.5px;
  line-height:1.5;
  font-weight:600;
  color:var(--brand-deep);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rcard-body p{
  margin:0;
  font-size:13.5px;
  line-height:1.8;
  color:var(--ink-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rcard-meta{
  margin-top:auto;
  font-size:12.5px;
  color:var(--ink-3);
}

/* ============ EMPTY ============ */
.empty-box{
  max-width:820px;
  padding:56px 24px;
  text-align:center;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
}
.empty-box svg{
  width:44px;height:44px;
  margin:0 auto 16px;
  display:block;
  fill:none;stroke:var(--ink-3);
  stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round;
}
.empty-box p{margin:0 0 22px;color:var(--ink-2);font-size:15px;}

/* ============ FOOTER ============ */
.site-footer{
  margin-top:88px;
  background:#EEF3F9;
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-about{
  margin:0;
  max-width:340px;
  font-size:13.5px;
  line-height:1.9;
  color:var(--ink-3);
}
.foot-col h3{
  margin:0 0 16px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-deep);
  letter-spacing:.3px;
}
.foot-list{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.foot-list li a,
.foot-list li span{
  font-size:13.5px;
  line-height:1.75;
  color:var(--ink-2);
}
.foot-list li a:hover{color:var(--brand);}
.foot-bottom{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:grid;
  gap:10px;
}
.row-line{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  font-size:13px;
  color:var(--ink-3);
}

/* ============ RESPONSIVE ============ */
@media (max-width:1399px){
  .article-shell{grid-template-columns:minmax(0,1fr) 280px;gap:40px;}
}
@media (max-width:1199px){
  .article-shell{grid-template-columns:minmax(0,1fr);gap:0;}
  .article-aside{display:none;}
}
@media (max-width:991px){
  .container-x{padding:0 16px;}
  .nav-top{flex-wrap:wrap;height:auto;padding:12px 0 4px;gap:14px;}
  .site-header.is-stuck .nav-top{height:auto;}
  .search-wrap{order:3;flex:1 1 100%;max-width:none;margin:0;height:44px;}
  .nav-actions{margin-left:auto;}
  .article-title{font-size:30px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .page-main{padding:24px 0 64px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .site-footer{margin-top:64px;padding:56px 0 24px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .brand-text{font-size:15.5px;}
  .btn-sm-x{height:38px;padding:0 14px;font-size:13px;}
  .search-submit{height:36px;padding:0 16px;}
  .article-title{font-size:26px;}
  .article-meta{margin-bottom:24px;padding-bottom:18px;}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:20px;margin-top:34px;}
  .article-body h3{font-size:17.5px;}
  .article-body blockquote{padding:14px 16px;font-size:15px;}
  .card-grid{grid-template-columns:minmax(0,1fr);gap:18px;}
  .related{margin-top:48px;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:8px;}
  .back-row{gap:10px;}
  .back-row .btn-brand,
  .back-row .btn-ghost{flex:1 1 100%;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .site-footer{margin-top:48px;padding:48px 0 22px;}
}
@media (max-width:520px){
  .search-wrap{height:44px;padding-left:38px;}
  .article-title{font-size:24px;}
  .tag-row{gap:8px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category1 */
:root{
  --brand:#2F6FB0;
  --brand-deep:#1B4A76;
  --brand-soft:#EAF1F8;
  --accent:#E0A33C;
  --ok:#2E8F72;
  --warn:#C4622D;
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --line:#DCE5EF;
  --ink:#16222E;
  --ink-2:#5A6B7C;
  --ink-3:#8A98A6;
  --sh-1:0 1px 2px rgba(27,74,118,.06);
  --sh-2:0 6px 18px rgba(27,74,118,.08);
  --sh-3:0 14px 36px rgba(27,74,118,.12);
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sp-sec:88px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#2F6FB0;
  --bs-body-bg:#F6F8FB;
  --bs-body-color:#16222E;
  --bs-border-radius:14px;
  --bs-border-color:#DCE5EF;
  --bs-link-color:#2F6FB0;
  --bs-link-hover-color:#1B4A76;
  --bs-body-font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--bs-body-font-family);
  font-size:17px;
  line-height:1.8;
  padding-top:0;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-deep);}
h1,h2,h3,h4{margin:0;color:var(--brand-deep);font-weight:700;line-height:1.35;letter-spacing:.2px;}
p{margin:0 0 1.1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-shrink{box-shadow:var(--sh-2);}
.nav-top{
  display:flex;
  align-items:center;
  gap:24px;
  height:64px;
  transition:height .2s var(--ease);
}
.site-header.is-shrink .nav-top{height:56px;}
.nav-brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  text-decoration:none;
}
.logo-mark{
  width:34px;height:34px;
  flex:0 0 auto;
  border-radius:10px;
  background:linear-gradient(135deg,#3B7EC0,#1B4A76);
  display:grid;place-items:center;
  box-shadow:var(--sh-1);
}
.logo-mark svg{width:20px;height:20px;fill:none;stroke:#fff;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.brand-text{font-size:17px;font-weight:700;color:var(--brand-deep);white-space:nowrap;}

.search-wrap{
  position:relative;
  display:flex;
  align-items:center;
  flex:1 1 auto;
  min-width:40%;
  max-width:600px;
  height:46px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:0 5px 0 44px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.search-wrap:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(47,111,176,.14);
  transform:scale(1.01);
}
.search-ico{
  position:absolute;left:16px;top:50%;
  width:18px;height:18px;
  transform:translateY(-50%);
  fill:none;stroke:var(--ink-3);stroke-width:1.8;stroke-linecap:round;
}
.search-input{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  border:0;outline:none;
  background:transparent;
  font-size:15px;
  color:var(--ink);
}
.search-input::placeholder{color:var(--ink-3);}
.search-submit{
  flex:0 0 auto;
  height:36px;
  padding:0 20px;
  border:0;
  border-radius:var(--r-pill);
  background:var(--brand);
  color:#fff;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.search-submit:hover{background:var(--brand-deep);transform:translateY(-1px);}
.search-submit:active{transform:translateY(0);}

.nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

.btn-brand,.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-brand{
  background:var(--brand);
  color:#fff;
  border:1px solid var(--brand);
  box-shadow:var(--sh-1);
}
.btn-brand:hover{
  background:var(--brand-deep);
  border-color:var(--brand-deep);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
}
.btn-brand:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.12);}
.btn-ghost{
  background:transparent;
  color:var(--brand);
  border:1.5px solid var(--brand);
}
.btn-ghost:hover{
  background:var(--brand-soft);
  border-color:var(--brand-deep);
  color:var(--brand-deep);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(0);}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px;}

.pill-row{
  display:flex;
  align-items:center;
  gap:8px;
  height:44px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.pill-row::-webkit-scrollbar{display:none;}
.pill{
  flex:0 0 auto;
  padding:8px 16px;
  border-radius:var(--r-pill);
  font-size:14px;
  font-weight:500;
  color:var(--ink-2);
  background:transparent;
  border:1px solid transparent;
  white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.pill:hover{background:var(--brand-soft);color:var(--brand-deep);}
.pill.is-active{
  background:var(--brand);
  color:#fff;
  border-color:var(--brand);
}

/* ============ 分类 Banner ============ */
.page-hero{
  position:relative;
  padding:72px 0 76px;
  background-color:#E8EFF7;
  background-image:linear-gradient(100deg,rgba(255,255,255,.86) 0%,rgba(234,241,248,.78) 55%,rgba(234,241,248,.62) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";
  position:absolute;
  right:6%;
  bottom:-1px;
  width:180px;height:1px;
  background:linear-gradient(90deg,transparent,var(--brand));
  opacity:.5;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-3);
  margin-bottom:18px;
}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--line);}
.page-hero h1{
  font-size:38px;
  max-width:900px;
  margin-bottom:16px;
}
.hero-desc{
  max-width:720px;
  font-size:17px;
  color:var(--ink-2);
  line-height:1.85;
  margin-bottom:24px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  color:var(--brand-deep);
  background:rgba(255,255,255,.88);
  border:1px solid var(--line);
}
.tag i{
  width:6px;height:6px;border-radius:50%;
  background:var(--brand);
  display:inline-block;
}

/* ============ 通用板块 ============ */
.section{padding:var(--sp-sec) 0;}
.section.is-soft{background:linear-gradient(180deg,#FFFFFF 0%,var(--brand-soft) 100%);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-head h2{font-size:28px;margin-bottom:12px;}
.sec-head p{color:var(--ink-2);font-size:16px;margin:0;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  font-weight:700;
  letter-spacing:1px;
  color:var(--brand);
  text-transform:uppercase;
  margin-bottom:10px;
}

/* ============ 简介 ============ */
.intro-body{max-width:760px;}
.intro-body p{color:var(--ink-2);font-size:17px;line-height:1.9;}
.intro-body p:last-child{margin-bottom:0;}
.intro-note{
  margin-top:28px;
  padding:18px 22px;
  background:var(--brand-soft);
  border-left:3px solid var(--brand);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:15px;
  color:var(--brand-deep);
}

/* ============ 条目卡片网格 ============ */
.grid-cards{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.tile{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.tile:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.tile-media{
  position:relative;
  aspect-ratio:16/9;
  background:var(--brand-soft);
  overflow:hidden;
}
.tile-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.tile:hover .tile-media img{transform:scale(1.03);}
.tile-media .ribbon{
  position:absolute;
  left:12px;top:12px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  color:var(--brand-deep);
  background:rgba(255,255,255,.92);
  box-shadow:var(--sh-1);
}
.tile-body{
  display:flex;
  flex-direction:column;
  flex:1 1 auto;
  padding:20px 22px 22px;
}
.tile-body h3{
  font-size:18px;
  line-height:1.5;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.tile-body p{
  font-size:15px;
  line-height:1.75;
  color:var(--ink-2);
  margin-bottom:16px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.tile-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--ink-3);
  padding-top:14px;
  border-top:1px solid var(--line);
}
.tile-foot .chip{
  padding:3px 10px;
  border-radius:var(--r-pill);
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-weight:600;
  font-size:12px;
}

/* ============ 步骤条 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
  position:relative;
}
.step{
  position:relative;
  padding:26px 22px 24px;
  background:var(--surface);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  border-top:3px solid var(--brand);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.step:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;height:30px;
  border-radius:9px;
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-size:14px;
  font-weight:700;
  margin-bottom:14px;
}
.step h3{font-size:18px;margin-bottom:8px;}
.step p{font-size:15px;color:var(--ink-2);line-height:1.75;margin:0;}

/* ============ 安全要点 ============ */
.points-wrap{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px 40px;
  max-width:980px;
}
.point-item{
  display:flex;
  gap:14px;
  align-items:flex-start;
  padding:18px 0;
  border-bottom:1px solid var(--line);
}
.point-item:last-child,.point-item:nth-last-child(2){border-bottom:0;}
.point-ico{
  flex:0 0 auto;
  width:34px;height:34px;
  border-radius:10px;
  background:var(--brand-soft);
  display:grid;place-items:center;
}
.point-ico svg{width:18px;height:18px;fill:none;stroke:var(--brand);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.point-item strong{display:block;font-size:16px;color:var(--brand-deep);margin-bottom:4px;}
.point-item span{font-size:15px;color:var(--ink-2);line-height:1.75;}

/* ============ FAQ ============ */
.faq-acc .accordion-item{
  border:0;
  border-radius:var(--r-md);
  background:var(--surface);
  box-shadow:var(--sh-1);
  margin-bottom:12px;
  overflow:hidden;
}
.faq-acc .accordion-button{
  padding:20px 22px;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  background:transparent;
  box-shadow:none;
  line-height:1.6;
}
.faq-acc .accordion-button:focus{box-shadow:none;outline:none;}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--brand-deep);
  background:var(--brand-soft);
}
.faq-acc .accordion-button::after{
  content:"";
  width:10px;height:10px;
  margin-left:auto;
  flex:0 0 auto;
  background-image:none;
  border-right:2px solid var(--brand);
  border-bottom:2px solid var(--brand);
  transform:rotate(45deg);
  transition:transform .2s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);}
.faq-acc .accordion-body{
  padding:18px 22px 22px;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  border-top:1px solid var(--line);
}

/* ============ CTA ============ */
.cta-band{
  padding:48px 52px;
  border-radius:var(--r-lg);
  background:linear-gradient(115deg,#EAF1F8 0%,#D8E7F5 100%);
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  box-shadow:var(--sh-1);
}
.cta-band h2{font-size:26px;margin-bottom:10px;}
.cta-band p{font-size:16px;color:var(--ink-2);margin-bottom:12px;max-width:620px;}
.cta-band .fine{font-size:13px;color:var(--ink-3);margin:0;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;}

/* ============ 页脚 ============ */
.site-footer{
  background:#EDF2F8;
  border-top:1px solid var(--line);
  padding:64px 0 28px;
  margin-top:0;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:40px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-about{
  font-size:14px;
  line-height:1.85;
  color:var(--ink-2);
  margin:0;
  max-width:360px;
}
.foot-col h3{
  font-size:15px;
  font-weight:700;
  color:var(--brand-deep);
  margin-bottom:16px;
}
.foot-list li{margin-bottom:10px;}
.foot-list a,.foot-list span{
  font-size:14px;
  color:var(--ink-2);
  line-height:1.7;
}
.foot-list a:hover{color:var(--brand);}
.foot-bottom{
  border-top:1px solid var(--line);
  padding-top:22px;
}
.foot-bottom .row-line{
  display:flex;
  flex-wrap:wrap;
  gap:8px 24px;
  justify-content:space-between;
  font-size:13px;
  color:var(--ink-3);
  line-height:1.8;
  margin-bottom:8px;
}
.foot-bottom .row-line:last-child{margin-bottom:0;justify-content:flex-start;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container-x{padding:0 20px;}
  .grid-cards{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:991px){
  :root{--sp-sec:64px;}
  .container-x{padding:0 16px;}
  .nav-top{gap:16px;}
  .search-wrap{min-width:32%;}
  .page-hero{padding:56px 0 60px;}
  .page-hero h1{font-size:32px;}
  .grid-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .points-wrap{grid-template-columns:1fr;gap:0;}
  .point-item:nth-last-child(2){border-bottom:1px solid var(--line);}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 32px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .foot-about{max-width:100%;}
}
@media (max-width:767px){
  :root{--sp-sec:48px;}
  body{font-size:16px;line-height:1.85;}
  .nav-top{
    flex-wrap:wrap;
    height:auto;
    padding:10px 0 12px;
    gap:10px 12px;
  }
  .site-header.is-shrink .nav-top{height:auto;}
  .nav-brand{order:1;}
  .nav-actions{order:2;margin-left:auto;}
  .search-wrap{
    order:3;
    flex:1 0 100%;
    min-width:0;
    max-width:100%;
    height:44px;
  }
  .search-submit{height:34px;padding:0 16px;}
  .pill-row{height:auto;padding:6px 0 10px;}
  .btn-sm-x{height:38px;padding:0 14px;font-size:13px;}
  .page-hero{padding:44px 0 48px;}
  .page-hero h1{font-size:26px;line-height:1.4;}
  .hero-desc{font-size:16px;}
  .sec-head h2{font-size:22px;}
  .grid-cards{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .cta-band{padding:28px 22px;border-radius:var(--r-md);}
  .cta-band h2{font-size:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{flex:1 1 100%;}
  .foot-grid{grid-template-columns:1fr;gap:28px;padding-bottom:28px;}
  .foot-bottom .row-line{justify-content:flex-start;}
  .faq-acc .accordion-button{font-size:16px;padding:16px 16px;}
  .faq-acc .accordion-body{padding:14px 16px 18px;font-size:15px;}
}
@media (max-width:520px){
  .page-hero h1{font-size:24px;}
  .tile-body{padding:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category2 */
:root{
  --brand:#2F6FB0;
  --brand-deep:#1B4A76;
  --brand-soft:#EAF1F8;
  --accent:#E0A33C;
  --ok:#2E8F72;
  --warn:#C4622D;
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --line:#DCE5EF;
  --ink:#16222E;
  --ink-2:#5A6B7C;
  --ink-3:#8A98A6;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(27,74,118,.06);
  --sh-2:0 6px 18px rgba(27,74,118,.08);
  --sh-3:0 14px 36px rgba(27,74,118,.12);
  --sec:88px;
  --ease:cubic-bezier(.2,.7,.3,1);

  --bs-primary:#2F6FB0;
  --bs-body-bg:#F6F8FB;
  --bs-body-color:#16222E;
  --bs-border-color:#DCE5EF;
  --bs-border-radius:12px;
  --bs-link-color:#2F6FB0;
  --bs-link-hover-color:#1B4A76;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand-deep)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;color:var(--ink)}
p{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* ============ 容器 ============ */
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-shrink{box-shadow:var(--sh-2)}
.nav-top{
  display:flex;align-items:center;gap:24px;
  height:64px;
  transition:height .2s var(--ease);
}
.site-header.is-shrink .nav-top{height:56px}
.nav-brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;color:var(--ink);font-weight:700;
}
.nav-brand:hover{color:var(--brand-deep)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#3B7DBC,#1B4A76);
  box-shadow:0 2px 6px rgba(27,74,118,.22);
}
.logo-mark svg{
  width:19px;height:19px;fill:none;stroke:#fff;
  stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;
}
.brand-text{font-size:17px;letter-spacing:.2px;white-space:nowrap}

.search-wrap{
  position:relative;
  flex:1 1 440px;
  max-width:640px;
  margin:0 auto;
  transition:transform .18s var(--ease);
}
.search-wrap:focus-within{transform:scale(1.01)}
.search-ico{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  width:18px;height:18px;fill:none;stroke:var(--ink-3);
  stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;
  pointer-events:none;
}
.search-input{
  width:100%;height:46px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface);
  padding:0 108px 0 44px;
  font-size:14.5px;color:var(--ink);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.search-input::placeholder{color:var(--ink-3)}
.search-input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(47,111,176,.14);
}
.search-submit{
  position:absolute;right:5px;top:5px;
  height:36px;padding:0 18px;
  border:0;border-radius:999px;
  background:var(--brand);color:#fff;
  font-size:14px;font-weight:600;
  cursor:pointer;
  transition:background .18s var(--ease),transform .18s var(--ease);
}
.search-submit:hover{background:var(--brand-deep)}
.search-submit:active{transform:translateY(1px)}

.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.btn-brand,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn-brand{
  background:var(--brand);color:#fff;
  box-shadow:var(--sh-1);
}
.btn-brand:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-brand:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.16)}
.btn-ghost{
  background:var(--surface);color:var(--brand);
  border:1.5px solid var(--brand);
}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:var(--brand-deep)}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px}
.btn-lg-x{height:50px;padding:0 30px;font-size:16px}

.pill-row{
  display:flex;align-items:center;gap:10px;
  height:44px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.pill-row::-webkit-scrollbar{display:none}
.pill{
  display:inline-flex;align-items:center;
  min-height:34px;padding:6px 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink-2);
  font-size:14px;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.pill:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:#B9D0E6}
.pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}

/* ============ 分类 Banner ============ */
.cat-banner{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.cat-banner::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:url(/assets/images/backpic/back-2.png) center/cover no-repeat;
}
.cat-banner::after{
  content:"";position:absolute;inset:0;z-index:2;
  background:linear-gradient(100deg,rgba(246,248,251,.97) 0%,rgba(246,248,251,.88) 44%,rgba(234,241,248,.68) 100%);
}
.cat-banner .container-x{position:relative;z-index:3;padding-top:56px;padding-bottom:60px}
.crumb{font-size:13px;color:var(--ink-3);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C3CEDB}
.crumb .now{color:var(--ink-2)}
.cat-banner h1{
  margin-top:18px;
  font-size:38px;line-height:1.3;letter-spacing:.2px;
  max-width:860px;
}
.cat-banner h1 em{font-style:normal;color:var(--brand-deep)}
.cat-lead{
  margin-top:16px;max-width:720px;
  font-size:17px;color:var(--ink-2);
}
.cat-banner-meta{
  margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;
}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.86);
  border:1px solid var(--line);
  font-size:13.5px;color:var(--ink-2);
}
.chip i{width:7px;height:7px;border-radius:50%;background:var(--brand);display:inline-block}
.chip.is-gold{border-color:rgba(224,163,60,.55);color:#8A6420;background:rgba(255,250,240,.9)}
.chip.is-gold i{background:var(--accent)}

/* ============ 通用板块 ============ */
.section{padding:var(--sec) 0}
.section-tight{padding:64px 0}
.sec-head{margin-bottom:34px}
.sec-title{font-size:28px;line-height:1.35}
.sec-desc{margin-top:12px;color:var(--ink-2);font-size:16px;max-width:760px}
.eyebrow{
  display:inline-block;margin-bottom:12px;
  font-size:12.5px;font-weight:600;letter-spacing:1.4px;
  color:var(--brand);text-transform:uppercase;
}

/* ============ 简介区 ============ */
.intro-wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:34px}
.intro-body{max-width:760px}
.intro-body p{font-size:17px;line-height:1.9;color:var(--ink-2)}
.intro-body p + p{margin-top:18px}
.intro-body strong{color:var(--ink);font-weight:600}
.intro-stats{
  display:flex;flex-wrap:wrap;gap:14px;
  margin-top:30px;
}
.stat-bar{
  display:flex;align-items:center;gap:10px;
  padding:12px 20px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  box-shadow:var(--sh-1);
  font-size:14px;color:var(--ink-2);
}
.stat-bar i{width:8px;height:8px;border-radius:50%;background:var(--brand);display:inline-block}
.stat-bar b{color:var(--brand-deep);font-size:16px;font-weight:700}

/* ============ 图文板块 ============ */
.adapt-figure{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center}
.figure-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-2);
  background:var(--brand-soft);
}
.figure-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.figure-media::after{
  content:"";position:absolute;left:-1px;bottom:-1px;width:78px;height:78px;
  border-left:1px solid rgba(47,111,176,.5);
  border-bottom:1px solid rgba(47,111,176,.5);
  border-bottom-left-radius:18px;
  pointer-events:none;
}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 0;border-bottom:1px dashed var(--line);
  font-size:15.5px;color:var(--ink-2);
}
.check-list li:last-child{border-bottom:0}
.check-ico{
  flex:0 0 auto;width:22px;height:22px;margin-top:3px;
  border-radius:50%;background:var(--brand-soft);
  display:grid;place-items:center;
}
.check-ico svg{width:13px;height:13px;fill:none;stroke:var(--brand);stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}

/* ============ 条目列表（左图标 + 右文） ============ */
.dev-list{display:flex;flex-direction:column;gap:16px}
.dev-row{
  display:flex;align-items:flex-start;gap:22px;
  padding:22px 24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.dev-row:hover{
  background:var(--brand-soft);
  border-color:#C6D8EA;
  transform:translateX(4px);
  box-shadow:var(--sh-2);
}
.dev-ico{
  flex:0 0 auto;width:56px;height:56px;border-radius:var(--r-sm);
  background:linear-gradient(140deg,#F1F7FD,#E1EDF8);
  border:1px solid #CFE1F1;
  display:grid;place-items:center;
}
.dev-ico svg{width:26px;height:26px;fill:none;stroke:var(--brand);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.dev-body{min-width:0;flex:1 1 auto}
.dev-title{font-size:18px;font-weight:600;color:var(--ink);line-height:1.5}
.dev-sum{
  margin-top:8px;font-size:15px;line-height:1.8;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.dev-tags{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:999px;
  font-size:12.5px;color:var(--brand-deep);
  background:var(--brand-soft);
  border:1px solid #D3E4F3;
}
.dev-arrow{
  flex:0 0 auto;align-self:center;
  width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line);background:#fff;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.dev-arrow svg{width:15px;height:15px;fill:none;stroke:var(--ink-3);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.dev-row:hover .dev-arrow{background:var(--brand);border-color:var(--brand)}
.dev-row:hover .dev-arrow svg{stroke:#fff}

/* ============ 对照表 ============ */
.table-shell{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);box-shadow:var(--sh-1);
  overflow:auto;
}
table.adapt-table{width:100%;border-collapse:separate;border-spacing:0;min-width:760px}
.adapt-table th,.adapt-table td{
  padding:16px 18px;text-align:left;font-size:15px;vertical-align:top;
  border-bottom:1px solid var(--line);
}
.adapt-table thead th{
  position:sticky;top:0;z-index:2;
  background:var(--brand-soft);
  color:var(--brand-deep);font-weight:600;font-size:14.5px;
  letter-spacing:.2px;
}
.adapt-table tbody tr:nth-child(even){background:#FAFCFE}
.adapt-table tbody tr:hover{background:#F3F8FD}
.adapt-table tbody td:first-child{
  font-weight:600;color:var(--ink);position:sticky;left:0;background:var(--surface);
  border-right:1px solid var(--line);
}
.adapt-table tbody tr:nth-child(even) td:first-child{background:#FAFCFE}
.adapt-table tbody tr:hover td:first-child{background:#F3F8FD}
.adapt-table td{color:var(--ink-2)}
.cell-ok{display:inline-flex;align-items:center;gap:8px;color:var(--ok);font-weight:600}
.cell-ok svg{width:14px;height:14px;fill:none;stroke:var(--ok);stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}

/* ============ FAQ ============ */
.faq-acco .accordion-item{
  border:0;border-radius:var(--r-md);overflow:hidden;
  background:var(--surface);box-shadow:var(--sh-1);
  margin-bottom:12px;
}
.faq-acco .accordion-button{
  font-size:17px;font-weight:600;color:var(--ink);
  background:var(--surface);
  padding:20px 22px;
  box-shadow:none!important;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.faq-acco .accordion-button:not(.collapsed){color:var(--brand-deep);background:var(--brand-soft)}
.faq-acco .accordion-button::after{
  width:16px;height:16px;background-size:16px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232F6FB0' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  transition:transform .2s var(--ease);
}
.faq-acco .accordion-button:not(.collapsed)::after{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B4A76' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  transform:rotate(180deg);
}
.faq-acco .accordion-body{
  padding:2px 22px 22px;
  font-size:16px;line-height:1.85;color:var(--ink-2);
  background:var(--surface);
}

/* ============ CTA ============ */
.cta-band{
  border-radius:var(--r-lg);
  background:linear-gradient(100deg,#EAF1F8 0%,#D9E7F5 100%);
  border:1px solid #CFE1F1;
  padding:44px 40px;
  display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between;
  box-shadow:var(--sh-1);
}
.cta-band h2{font-size:26px;line-height:1.4;max-width:560px}
.cta-band p{margin-top:10px;font-size:15px;color:var(--ink-2);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-note{margin-top:18px;font-size:13px;color:var(--ink-3)}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:var(--sec);
  background:#EEF3F9;
  border-top:1px solid var(--line);
  padding:56px 0 24px;
}
.foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand .brand-text{font-size:17px;font-weight:700;color:var(--ink)}
.foot-about{font-size:14.5px;line-height:1.85;color:var(--ink-2);max-width:340px}
.foot-col h3{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:16px}
.foot-list li{margin-bottom:11px}
.foot-list a,.foot-list span{font-size:14px;color:var(--ink-2);line-height:1.7}
.foot-list a:hover{color:var(--brand-deep)}
.foot-bottom{
  margin-top:40px;padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:8px;
}
.row-line{
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  :root{--sec:72px}
  .cat-banner h1{font-size:34px}
  .foot-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:991.98px){
  :root{--sec:64px}
  .nav-top{gap:16px}
  .search-wrap{flex:1 1 320px}
  .cat-banner h1{font-size:31px}
  .adapt-figure{grid-template-columns:1fr;gap:28px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px}
  .cta-band{padding:36px 28px}
}
@media (max-width:860px){
  .nav-top{flex-wrap:wrap;height:auto;padding:10px 0;row-gap:10px}
  .site-header.is-shrink .nav-top{height:auto}
  .nav-brand{margin-right:auto}
  .search-wrap{order:3;flex:1 1 100%;max-width:none;margin:0}
  .search-input{height:44px}
  .search-submit{height:34px;top:5px}
  .pill-row{height:42px}
}
@media (max-width:767.98px){
  :root{--sec:48px}
  .container-x{padding:0 16px}
  body{font-size:16px;line-height:1.85}
  .btn-lg-x{height:46px;padding:0 22px;font-size:15px}
  .btn-sm-x{height:38px;padding:0 14px;font-size:13.5px}
  .cat-banner .container-x{padding-top:36px;padding-bottom:40px}
  .cat-banner h1{font-size:26px}
  .cat-lead{font-size:15.5px}
  .sec-title{font-size:22px}
  .intro-body p{font-size:16px}
  .dev-row{flex-direction:row;gap:16px;padding:18px 16px}
  .dev-ico{width:46px;height:46px}
  .dev-ico svg{width:22px;height:22px}
  .dev-title{font-size:16.5px}
  .dev-arrow{display:none}
  .cta-band{padding:28px 20px;border-radius:var(--r-md)}
  .cta-band h2{font-size:21px}
  .cta-actions{width:100%}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{flex:1 1 100%}
  .faq-acco .accordion-button{font-size:16px;padding:16px 18px}
  .faq-acco .accordion-body{padding:0 18px 18px}
  .foot-grid{grid-template-columns:1fr;gap:24px}
  .row-line{flex-direction:column;gap:6px}
}
@media (max-width:520px){
  .nav-actions{gap:8px}
  .nav-brand .brand-text{font-size:15.5px}
  .cat-banner-meta{gap:8px}
  .chip{font-size:12.5px;padding:5px 12px}
  .stat-bar{width:100%;justify-content:flex-start}
  .dev-row{flex-direction:column;gap:12px}
  .dev-ico{width:42px;height:42px}
}

/* roulang page: category3 */
:root{
  --brand:#2F6FB0;
  --brand-deep:#1B4A76;
  --brand-soft:#EAF1F8;
  --accent:#E0A33C;
  --ok:#2E8F72;
  --warn:#C4622D;
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --line:#DCE5EF;
  --ink:#16222E;
  --ink-2:#5A6B7C;
  --ink-3:#8A98A6;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(27,74,118,.06);
  --sh-2:0 6px 18px rgba(27,74,118,.08);
  --sh-3:0 14px 36px rgba(27,74,118,.12);
  --sec:88px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#2F6FB0;
  --bs-body-bg:#F6F8FB;
  --bs-body-color:#16222E;
  --bs-border-radius:12px;
  --bs-border-radius-lg:14px;
  --bs-link-color:#2F6FB0;
  --bs-link-hover-color:#1B4A76;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--bs-font-sans-serif);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand-deep)}
button,input{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--brand-deep);font-weight:700;line-height:1.35;letter-spacing:.2px}
p{margin:0 0 1.1em}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container-x{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--sec) 0}
.section-tight{padding:64px 0}
.sec-head{margin-bottom:34px;max-width:820px}
.sec-head h2{font-size:28px}
.sec-head p{margin:12px 0 0;color:var(--ink-2);font-size:16px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(120%) blur(6px);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-shrink{box-shadow:var(--sh-2)}
.nav-top{
  display:flex;align-items:center;gap:24px;
  height:64px;transition:height .2s var(--ease);
}
.site-header.is-shrink .nav-top{height:56px}
.nav-brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--brand-deep)}
.nav-brand:hover{color:var(--brand-deep)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand-soft);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
  border:1px solid #CFE0F0;
}
.logo-mark svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.brand-text{font-size:19px;font-weight:700;letter-spacing:.4px}
.search-wrap{
  position:relative;flex:1 1 auto;max-width:620px;margin:0 auto;
  display:flex;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  height:46px;padding:0 4px 0 16px;
  transition:box-shadow .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.search-wrap:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(47,111,176,.14);
  transform:scale(1.01);
}
.search-ico{width:19px;height:19px;flex:0 0 auto;fill:none;stroke:var(--ink-3);stroke-width:1.9;stroke-linecap:round}
.search-input{
  flex:1 1 auto;border:0;background:transparent;height:100%;
  padding:0 12px;font-size:15px;color:var(--ink);outline:none;
}
.search-input::placeholder{color:var(--ink-3)}
.search-submit{
  flex:0 0 auto;border:0;height:38px;padding:0 20px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;cursor:pointer;
  transition:background .18s var(--ease),transform .18s var(--ease);
}
.search-submit:hover{background:var(--brand-deep)}
.search-submit:active{transform:translateY(1px)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 24px;border-radius:10px;border:0;
  background:var(--brand);color:#fff;font-size:16px;font-weight:600;cursor:pointer;
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-brand:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-brand:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.14)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 22px;border-radius:10px;
  background:#fff;color:var(--brand);border:1.5px solid var(--brand);
  font-size:16px;font-weight:600;
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-brand.btn-sm-x,.btn-ghost.btn-sm-x{height:40px;padding:0 18px;font-size:15px}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px}
.btn-text:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.pill-row{
  display:flex;gap:10px;align-items:center;
  height:44px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;
  border-top:1px solid var(--line);
}
.pill-row::-webkit-scrollbar{display:none}
.pill{
  flex:0 0 auto;display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;
  color:var(--ink-2);font-size:14px;font-weight:500;white-space:nowrap;
  transition:all .18s var(--ease);
}
.pill:hover{color:var(--brand);border-color:#BFD5EA;background:var(--brand-soft)}
.pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff}
.pill.is-active:hover{background:var(--brand-deep);color:#fff}

/* ---------- banner ---------- */
.page-banner{position:relative;overflow:hidden;background:var(--brand-soft)}
.page-banner-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.9;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(255,255,255,.92) 0%,rgba(255,255,255,.74) 52%,rgba(246,248,251,.6) 100%);
}
.page-banner .container-x{position:relative;z-index:2;padding-top:56px;padding-bottom:56px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:16px}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand)}
.crumb span{color:var(--ink-3)}
.page-banner h1{font-size:38px;max-width:900px}
.banner-sub{margin:16px 0 0;font-size:17px;color:var(--ink-2);max-width:660px}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag-pill{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border-radius:var(--r-pill);background:#fff;border:1px solid #CFE0F0;
  color:var(--brand-deep);font-size:12px;font-weight:600;
}

/* ---------- intro ---------- */
.intro-wrap{max-width:760px}
.intro-wrap p{color:var(--ink-2);font-size:17px}
.intro-wrap p:last-child{margin-bottom:0}
.intro-lead{font-size:18px;color:var(--ink);font-weight:500}

/* ---------- entries layout ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.entry-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:18px;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#CFE0F0}
.entry-card:hover .media img{transform:scale(1.03)}
.media{
  position:relative;aspect-ratio:16/9;border-radius:var(--r-md);overflow:hidden;
  background:var(--brand-soft);
}
.media img{width:100%;height:100%;object-fit:cover;transition:transform .25s var(--ease)}
.media-fallback{
  position:absolute;inset:0;display:none;align-items:center;justify-content:center;
}
.media-fallback svg{width:36px;height:36px;fill:none;stroke:#9FBAD4;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.media.is-fallback .media-fallback{display:flex}
.entry-body{padding:16px 4px 4px}
.entry-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-deep);font-size:12px;font-weight:600;
}
.entry-card h3{font-size:18px;margin:12px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.entry-card p{
  color:var(--ink-2);font-size:15px;line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-meta{display:flex;align-items:center;gap:8px;margin-top:14px;font-size:13px;color:var(--ink-3)}

/* ---------- side panel ---------- */
.side-panel{position:sticky;top:132px}
.panel-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-1);
}
.panel-card + .panel-card{margin-top:20px}
.panel-card h3{font-size:18px;margin-bottom:6px}
.panel-card .panel-sub{font-size:14px;color:var(--ink-3);margin:0 0 16px}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;
  padding:10px 0;border-bottom:1px dashed var(--line);font-size:15px;color:var(--ink-2);
}
.check-list li:last-child{border-bottom:0}
.check-list svg{width:18px;height:18px;flex:0 0 auto;margin-top:5px;fill:none;stroke:var(--ok);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.panel-cta{background:linear-gradient(160deg,#F2F7FC 0%,#E4EEF8 100%);border-color:#CFE0F0}
.panel-cta p{font-size:14px;color:var(--ink-2);margin:0 0 16px}
.panel-cta .btn-brand,.panel-cta .btn-ghost{width:100%}

/* ---------- tier strip ---------- */
.tier-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tier-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;position:relative;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.tier-item:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.tier-item.is-top{border-color:var(--accent);box-shadow:0 8px 22px rgba(224,163,60,.14)}
.tier-ribbon{
  position:absolute;top:-11px;right:16px;height:22px;padding:0 10px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--accent);color:#9A6C16;
  font-size:12px;font-weight:600;display:inline-flex;align-items:center;
}
.tier-item h3{font-size:19px}
.tier-item .tier-note{font-size:14px;color:var(--ink-3);margin:6px 0 14px}
.tier-item ul li{display:flex;gap:8px;font-size:15px;color:var(--ink-2);padding:6px 0}
.tier-item ul li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);margin-top:10px;flex:0 0 auto}

/* ---------- steps ---------- */
.step-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  border-top:1px solid var(--line);padding-top:32px;
}
.step-item{position:relative}
.step-num{
  width:36px;height:36px;border-radius:10px;background:var(--brand-soft);color:var(--brand-deep);
  display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;
  font-family:Inter,"Helvetica Neue",Arial,sans-serif;margin-bottom:14px;
}
.step-item h3{font-size:17px;margin-bottom:8px}
.step-item p{font-size:15px;color:var(--ink-2);margin:0}

/* ---------- scene ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scene-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.scene-item:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.scene-ico{
  width:40px;height:40px;border-radius:12px;background:var(--brand-soft);
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.scene-ico svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.scene-item h3{font-size:17px;margin-bottom:8px}
.scene-item p{font-size:15px;color:var(--ink-2);margin:0}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px}
.accordion-item{
  border:1px solid var(--line);border-radius:var(--r-md) !important;
  background:var(--surface);box-shadow:var(--sh-1);margin-bottom:12px;overflow:hidden;
}
.accordion-button{
  background:var(--surface);color:var(--brand-deep);font-size:17px;font-weight:600;
  padding:20px 52px 20px 22px;line-height:1.6;box-shadow:none !important;
}
.accordion-button:not(.collapsed){background:#fff;color:var(--brand)}
.accordion-button::after{
  background-image:none;width:14px;height:14px;border-right:2px solid var(--brand);
  border-bottom:2px solid var(--brand);transform:rotate(45deg);
  transition:transform .22s var(--ease);position:absolute;right:24px;bottom:24px;
}
.accordion-button:not(.collapsed)::after{transform:rotate(-135deg);bottom:20px}
.accordion-body{padding:0 22px 22px;color:var(--ink-2);font-size:16px;line-height:1.85}

/* ---------- cta ---------- */
.cta-band{
  background:linear-gradient(120deg,#E7F0F9 0%,#F3F7FC 100%);
  border:1px solid #D6E4F2;border-radius:var(--r-lg);
  padding:40px;box-shadow:var(--sh-1);
}
.cta-band h2{font-size:26px;margin-bottom:10px}
.cta-band p{color:var(--ink-2);margin:0;font-size:16px}
.cta-fine{margin-top:18px;font-size:13px;color:var(--ink-3)}

/* ---------- footer ---------- */
.site-footer{
  margin-top:var(--sec);background:#EEF3F9;border-top:1px solid var(--line);
  padding:56px 0 28px;
}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand .brand-text{font-size:18px}
.foot-about{font-size:14px;color:var(--ink-2);max-width:320px;margin:0}
.foot-col h3{font-size:15px;color:var(--brand-deep);margin-bottom:14px}
.foot-list li{margin-bottom:10px}
.foot-list a,.foot-list span{font-size:14px;color:var(--ink-2);line-height:1.7}
.foot-list a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.foot-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--line)}
.row-line{display:flex;flex-wrap:wrap;gap:8px 24px;font-size:13px;color:var(--ink-3);margin-bottom:8px}
.row-line:last-child{margin-bottom:0}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .container-x{max-width:1140px}
  .foot-grid{grid-template-columns:1.3fr 1fr 1fr;gap:28px}
}
@media (max-width:991px){
  :root{--sec:64px}
  .page-banner h1{font-size:32px}
  .nav-top{height:auto;padding:12px 0;flex-wrap:wrap;gap:12px}
  .search-wrap{order:3;flex-basis:100%;max-width:none;margin:0}
  .entry-grid{grid-template-columns:1fr}
  .side-panel{position:static;margin-top:24px}
  .tier-strip{grid-template-columns:1fr}
  .step-row{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .cta-band{padding:32px}
}
@media (max-width:767px){
  :root{--sec:48px}
  body{font-size:16px;line-height:1.85}
  .container-x{padding:0 16px}
  .brand-text{font-size:17px}
  .nav-actions .btn-ghost,.nav-actions .btn-brand{height:38px;padding:0 14px;font-size:14px}
  .page-banner .container-x{padding-top:36px;padding-bottom:36px}
  .page-banner h1{font-size:26px}
  .banner-sub{font-size:15px}
  .sec-head h2{font-size:22px}
  .entry-grid{gap:18px}
  .step-row{grid-template-columns:1fr;padding-top:24px}
  .scene-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:24px}
  .cta-band{padding:26px 20px}
  .cta-band h2{font-size:22px}
  .btn-brand,.btn-ghost{height:44px;padding:0 18px;font-size:15px}
  .accordion-button{font-size:16px;padding:16px 46px 16px 18px}
  .accordion-button::after{right:18px;bottom:22px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}

/* roulang page: category4 */
:root{
  --brand:#2F6FB0;
  --brand-deep:#1B4A76;
  --brand-soft:#EAF1F8;
  --accent:#E0A33C;
  --ok:#2E8F72;
  --warn:#C4622D;
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --line:#DCE5EF;
  --ink:#16222E;
  --ink-2:#5A6B7C;
  --ink-3:#8A98A6;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(27,74,118,.06);
  --sh-2:0 6px 18px rgba(27,74,118,.08);
  --sh-3:0 14px 36px rgba(27,74,118,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#2F6FB0;
  --bs-body-bg:#F6F8FB;
  --bs-body-color:#16222E;
  --bs-border-radius:14px;
  --bs-link-color:#2F6FB0;
  --bs-link-hover-color:#1B4A76;
  --bs-font-sans-serif:'PingFang SC','Microsoft YaHei','Noto Sans SC','Source Han Sans',system-ui,-apple-system,'Segoe UI',sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC','Source Han Sans',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:17px;
  line-height:1.8;
  font-weight:400;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand-deep)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--brand-deep);font-weight:700;line-height:1.35;letter-spacing:.2px}
p{margin:0}
button,input{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container-x{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.sec{padding:88px 0}
.sec-tight{padding:64px 0}
.sec-head{margin-bottom:32px}
.sec-head h2{font-size:28px}
.sec-head .sec-desc{margin-top:12px;color:var(--ink-2);font-size:16px;max-width:760px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:5px 14px;margin-bottom:14px;font-weight:600}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,248,251,.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease),background .2s var(--ease);
}
.site-header.is-compact{box-shadow:var(--sh-2)}
.nav-top{
  display:flex;align-items:center;gap:20px;
  height:64px;
  transition:height .2s var(--ease);
}
.site-header.is-compact .nav-top{height:56px}
.nav-brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:34px;height:34px;border-radius:11px;background:var(--brand);display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--sh-1)}
.logo-mark svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.brand-text{font-size:18px;font-weight:700;color:var(--brand-deep);letter-spacing:.3px;white-space:nowrap}
.search-wrap{
  position:relative;display:flex;align-items:center;
  flex:1 1 auto;max-width:560px;height:46px;
  margin:0 auto;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  padding:4px 4px 4px 16px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.search-wrap:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(47,111,176,.14);
  transform:scale(1.01);
}
.search-ico{width:19px;height:19px;flex-shrink:0;fill:none;stroke:var(--ink-3);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.search-input{
  flex:1 1 auto;min-width:0;height:38px;
  border:0;background:transparent;outline:none;
  padding:0 12px;color:var(--ink);font-size:15px;
}
.search-input::placeholder{color:var(--ink-3)}
.search-submit{
  flex-shrink:0;height:36px;padding:0 22px;
  border:0;border-radius:999px;cursor:pointer;
  background:var(--brand);color:#fff;font-size:14px;font-weight:600;
  transition:background .18s var(--ease);
}
.search-submit:hover{background:var(--brand-deep)}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 26px;border-radius:var(--r-btn);
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-brand:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-brand:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.14)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  background:var(--surface);color:var(--brand);font-size:15px;font-weight:600;
  border:1.5px solid var(--brand);cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);transform:translateY(-2px);box-shadow:var(--sh-1)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px;border-radius:9px}
.btn-lg-x{height:52px;padding:0 30px;font-size:16px}
.pill-row{
  display:flex;align-items:center;gap:8px;
  height:44px;overflow-x:auto;white-space:nowrap;
  scrollbar-width:none;-ms-overflow-style:none;
}
.pill-row::-webkit-scrollbar{display:none}
.pill{
  display:inline-flex;align-items:center;height:34px;padding:0 15px;
  border-radius:999px;font-size:14px;color:var(--ink-2);font-weight:500;
  border:1px solid transparent;transition:all .18s var(--ease);flex-shrink:0;
}
.pill:hover{background:var(--brand-soft);color:var(--brand-deep)}
.pill.is-active{background:var(--brand);color:#fff;font-weight:600}

/* ---------- Banner ---------- */
.page-banner{
  position:relative;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  padding:70px 0 66px;
  overflow:hidden;
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(255,255,255,.92) 0%,rgba(234,241,248,.80) 58%,rgba(234,241,248,.66) 100%);
}
.page-banner .container-x{position:relative;z-index:1}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:18px;flex-wrap:wrap}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand)}
.crumb-sep{color:var(--ink-3)}
.page-banner h1{font-size:38px;max-width:860px;line-height:1.32}
.banner-sub{margin-top:16px;font-size:18px;color:var(--ink-2);max-width:720px;line-height:1.75}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag-x{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  border-radius:999px;background:rgba(255,255,255,.86);
  border:1px solid var(--line);color:var(--brand-deep);
  font-size:13px;font-weight:500;
}

/* ---------- Intro ---------- */
.intro-wrap{max-width:760px}
.intro-wrap p{font-size:17px;color:var(--ink-2);line-height:1.9;margin-bottom:18px}
.intro-wrap p:last-child{margin-bottom:0}
.intro-wrap strong{color:var(--brand-deep);font-weight:600}

/* ---------- Info bar ---------- */
.info-bar{
  display:grid;grid-template-columns:repeat(3,1fr);
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;
}
.info-cell{padding:26px 28px;border-right:1px solid var(--line)}
.info-cell:last-child{border-right:0}
.info-k{display:block;font-size:13px;color:var(--ink-3);letter-spacing:.4px}
.info-v{display:block;margin-top:8px;font-size:20px;font-weight:700;color:var(--brand-deep)}
.info-note{display:block;margin-top:6px;font-size:14px;color:var(--ink-2)}

/* ---------- Timeline ---------- */
.tl{position:relative;margin-top:8px}
.tl::before{
  content:"";position:absolute;left:19px;top:10px;bottom:10px;width:2px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--line) 88%);
}
.tl-item{position:relative;padding:0 0 26px 66px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  position:absolute;left:8px;top:6px;width:24px;height:24px;border-radius:999px;
  background:var(--surface);border:2px solid var(--brand);color:var(--brand);
  font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.tl-body{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:22px 24px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.tl-item:hover .tl-dot{background:var(--brand);color:#fff;transform:scale(1.06)}
.tl-item:hover .tl-body{transform:translateX(4px);box-shadow:var(--sh-2);background:#FBFDFF}
.tl-flex{display:flex;gap:22px;align-items:flex-start}
.tl-main{flex:1 1 auto;min-width:0}
.tl-body h3{font-size:19px;margin-bottom:8px}
.tl-body p{color:var(--ink-2);font-size:15.5px;line-height:1.85;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tl-tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:999px;background:var(--brand-soft);color:var(--brand-deep);
  font-size:12px;font-weight:600;
}
.tl-tag.is-gold{background:#FBF3E4;color:#8A5F12;border:1px solid rgba(224,163,60,.5)}
.tl-thumb{
  flex:0 0 172px;width:172px;aspect-ratio:16/9;border-radius:var(--r-sm);
  object-fit:cover;background:var(--brand-soft);
}

/* ---------- Quotes ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 26px 24px;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.quote-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.quote-card p{font-size:15.5px;color:var(--ink-2);line-height:1.9}
.quote-who{margin-top:16px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-3)}
.quote-who::before{content:"";width:18px;height:2px;background:var(--accent);border-radius:2px}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px}
.acc-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);margin-bottom:12px;overflow:hidden;
  transition:box-shadow .2s var(--ease);
}
.acc-item:hover{box-shadow:var(--sh-2)}
.acc-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--brand-deep);
  transition:color .18s var(--ease);
}
.acc-btn:hover{color:var(--brand)}
.acc-btn::after{
  content:"";flex-shrink:0;width:9px;height:9px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);margin-top:-5px;
  transition:transform .22s var(--ease);
}
.acc-btn[aria-expanded="true"]::after{transform:rotate(-135deg);margin-top:4px}
.acc-body{padding:0 24px 22px;color:var(--ink-2);font-size:16px;line-height:1.9;max-width:760px}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(112deg,#EAF1F8 0%,#F7FAFD 100%);
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:44px 48px;box-shadow:var(--sh-1);
}
.cta-flex{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{font-size:26px;max-width:620px}
.cta-band .cta-desc{margin-top:12px;color:var(--ink-2);font-size:16px;max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-note{margin-top:20px;font-size:13px;color:var(--ink-3)}

/* ---------- Footer ---------- */
.site-footer{background:#EEF3F9;border-top:1px solid var(--line);padding:64px 0 28px;margin-top:8px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-about{font-size:14px;color:var(--ink-2);line-height:1.85;max-width:340px}
.foot-col h3{font-size:15px;color:var(--brand-deep);margin-bottom:16px;font-weight:700}
.foot-list li{margin-bottom:11px}
.foot-list a,.foot-list span{font-size:14px;color:var(--ink-2);line-height:1.7}
.foot-list a:hover{color:var(--brand)}
.foot-bottom{margin-top:44px;padding-top:20px;border-top:1px solid var(--line)}
.row-line{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--ink-3);line-height:1.9}
.row-line + .row-line{margin-top:8px}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .container-x{max-width:1140px}
  .sec{padding:72px 0}
  .page-banner h1{font-size:34px}
  .quote-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991px){
  .nav-top{flex-wrap:wrap;height:auto;padding:12px 0 0;gap:14px}
  .site-header.is-compact .nav-top{height:auto}
  .search-wrap{order:3;flex-basis:100%;max-width:none;margin:2px 0 10px}
  .nav-brand{margin-right:auto}
  .info-bar{grid-template-columns:1fr}
  .info-cell{border-right:0;border-bottom:1px solid var(--line)}
  .info-cell:last-child{border-bottom:0}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .sec{padding:64px 0}
  .page-banner{padding:56px 0 52px}
  .page-banner h1{font-size:30px}
  .banner-sub{font-size:17px}
  .tl-thumb{display:none}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.85}
  .container-x{padding:0 16px}
  .sec{padding:48px 0}
  .sec-head h2{font-size:22px}
  .page-banner h1{font-size:26px}
  .page-banner{padding:44px 0 42px}
  .search-wrap{height:44px}
  .btn-lg-x,.btn-brand,.btn-ghost{min-height:44px}
  .cta-band{padding:30px 22px}
  .cta-band h2{font-size:22px}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .quote-grid{grid-template-columns:1fr}
  .tl-item{padding-left:56px}
  .tl-body{padding:18px 18px}
  .acc-btn{padding:18px 18px;font-size:16px}
  .acc-body{padding:0 18px 18px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}