/* roulang page: index */
:root{
  --brand-600:#1B6FA8;
  --brand-700:#14567F;
  --brand-100:#E7F1F8;
  --accent-500:#FF7A45;
  --accent-600:#F2652C;
  --ink-900:#0F2436;
  --ink-700:#2C4658;
  --ink-500:#5A7286;
  --line:#E2ECF3;
  --bg:#F6FAFD;
  --surface:#FFFFFF;
  --ok:#1FA97F;
  --danger:#D64545;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 6px 24px rgba(15,36,54,.06);
  --sh-2:0 12px 32px rgba(15,36,54,.10);
  --sh-nav:0 2px 12px rgba(15,36,54,.06);
  --focus:0 0 0 3px rgba(27,111,168,.28);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;line-height:1.8;font-weight:400;
  color:var(--ink-700);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,figure,ul,ol,dl{margin:0;padding:0}
ul,ol{list-style:none}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-700)}
img{max-width:100%;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer}
table{border-collapse:collapse;width:100%}
.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1400px){.wrap{max-width:1240px}}
@media (min-width:992px) and (max-width:1199px){.wrap{max-width:960px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-nav)}
.nav-inner{display:flex;align-items:center;gap:24px;height:78px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink-900)}
.brand:hover{color:var(--ink-900)}
.brand-mark{
  width:40px;height:40px;border-radius:11px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-600);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;font-weight:600;color:var(--ink-900);letter-spacing:.2px}
.brand-text em{font-style:normal;font-size:12px;color:var(--ink-500);letter-spacing:.4px}

.main-nav{display:flex;align-items:center;gap:4px;margin-left:12px}
.nav-link{
  position:relative;padding:8px 14px;font-size:15px;color:var(--ink-700);
  border-radius:8px;transition:color .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-16px;height:2px;
  background:var(--brand-600);border-radius:2px;transform:scaleX(0);
  transform-origin:center;transition:transform .18s ease;
}
.nav-link:hover{color:var(--brand-600)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--brand-600);font-weight:500}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:10px;position:relative;
}
.nav-burger span{
  position:absolute;left:12px;right:12px;height:1.6px;background:var(--ink-900);
  border-radius:2px;transition:transform .2s ease,opacity .2s ease;
}
.nav-burger span:nth-child(1){top:15px}
.nav-burger span:nth-child(2){top:21px}
.nav-burger span:nth-child(3){top:27px}
.nav-burger.is-active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-burger.is-active span:nth-child(2){opacity:0}
.nav-burger.is-active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;line-height:1;border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--accent-500);color:#fff;border-color:var(--accent-500)}
.btn-primary:hover{background:var(--accent-600);border-color:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(255,122,69,.28)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--brand-600)}
.btn-outline:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-700);transform:translateY(-1px)}
.btn-outline:active{transform:none}
.btn-sm{height:42px;padding:0 20px;font-size:14px}
.btn-ghost{background:transparent;color:var(--brand-600);height:auto;padding:0}
.btn-ghost:hover{color:var(--brand-700)}
.btn-ghost .arw{transition:transform .2s ease;display:inline-flex}
.btn-ghost:hover .arw{transform:translateX(4px)}

/* ============ 通用板块 ============ */
.section{padding:80px 0}
.section-tight{padding:60px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.sec-head h2{font-size:clamp(22px,3vw,32px);font-weight:600;color:var(--ink-900);letter-spacing:0}
.sec-head .sec-sub{margin-top:10px;font-size:15px;color:var(--ink-500);max-width:640px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-100);color:var(--brand-700);
  font-size:13px;font-weight:500;padding:7px 14px;border-radius:999px;
}
.tag-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 11px;
  background:var(--brand-100);color:var(--brand-600);font-size:12px;
  border-radius:999px;font-weight:500;
}
.muted{color:var(--ink-500)}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:box-shadow .32s ease,transform .32s ease,border-color .32s ease;
}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#D6E6F1}
.thumb{overflow:hidden;border-radius:var(--r-img);background:#EEF4F9}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease}
.card:hover .thumb img,.row-card:hover .thumb img{transform:scale(1.03)}

/* ============ Hero ============ */
.hero{position:relative;padding:72px 0 84px;background:var(--bg);overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(27,111,168,.13) 1px,transparent 1px);
  background-size:24px 24px;
  -webkit-mask-image:radial-gradient(90% 70% at 80% 15%,#000 0%,transparent 72%);
  mask-image:radial-gradient(90% 70% at 80% 15%,#000 0%,transparent 72%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:repeat(12,1fr);gap:40px;align-items:center}
.hero-copy{grid-column:span 6}
.hero-visual{grid-column:span 6}
.hero h1{
  font-size:clamp(28px,4.2vw,44px);font-weight:600;line-height:1.32;
  color:var(--ink-900);margin:20px 0 16px;letter-spacing:0;
}
.hero-sub{font-size:17px;color:var(--ink-500);max-width:520px}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-points{margin-top:36px;display:grid;gap:14px}
.hero-points li{display:flex;gap:12px;align-items:flex-start}
.hero-points .pt-ico{
  width:34px;height:34px;border-radius:10px;background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--brand-600);flex:0 0 auto;
}
.hero-points .pt-t{font-size:15px;font-weight:500;color:var(--ink-900);line-height:1.5}
.hero-points .pt-d{font-size:14px;color:var(--ink-500);line-height:1.6}
.hero-visual{position:relative}
.hero-visual .hero-img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:20px;
  box-shadow:var(--sh-2);background:#EEF4F9;
}
.hero-float{
  position:absolute;left:-16px;bottom:22px;background:#fff;border:1px solid var(--line);
  border-radius:14px;box-shadow:var(--sh-2);padding:14px 18px;display:flex;align-items:center;gap:12px;
  max-width:270px;
}
.hero-float .hf-ico{
  width:36px;height:36px;border-radius:10px;background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.hero-float .hf-t{font-size:14px;font-weight:500;color:var(--ink-900);line-height:1.45}
.hero-float .hf-d{font-size:12px;color:var(--ink-500)}

/* ============ 快速入口 ============ */
.entry-bar{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.entry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:32px 0}
.entry-card{
  display:flex;align-items:center;gap:14px;padding:18px 20px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-card);transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--sh-1);border-color:#CFE3F0}
.entry-card .e-ico{
  width:44px;height:44px;border-radius:12px;background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.entry-card .e-t{font-size:15px;font-weight:500;color:var(--ink-900);line-height:1.4}
.entry-card .e-d{font-size:13px;color:var(--ink-500);line-height:1.5}
.entry-card .e-arw{margin-left:auto;color:var(--ink-500);transition:transform .24s ease,color .24s ease;display:flex}
.entry-card:hover .e-arw{transform:translateX(4px);color:var(--brand-600)}

/* ============ 步骤条 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-1);
}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;background:var(--ink-900);color:#fff;
  font-size:14px;font-weight:600;font-variant-numeric:tabular-nums;
}
.step h3{font-size:17px;font-weight:600;color:var(--ink-900);margin:16px 0 8px}
.step p{font-size:14px;color:var(--ink-500);line-height:1.7}
.step-line{position:absolute;top:43px;right:-14px;width:28px;height:1px;background:var(--line)}
.step:last-child .step-line{display:none}

/* ============ 品牌理念 ============ */
.story{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center}
.story h2{font-size:clamp(22px,3vw,32px);font-weight:600;color:var(--ink-900);margin-bottom:18px}
.story p{font-size:16px;color:var(--ink-700);margin-bottom:14px}
.story-fig{position:relative}
.story-fig img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-1);background:#EEF4F9}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}
.metric{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 16px;text-align:center}
.metric .m-num{font-size:28px;font-weight:600;color:var(--accent-500);line-height:1.2;font-variant-numeric:tabular-nums}
.metric .m-lab{font-size:13px;color:var(--ink-500);margin-top:6px}

/* ============ 精选内容 ============ */
.picks{display:grid;grid-template-columns:1.3fr 1fr;gap:26px;align-items:start}
.pick-main{overflow:hidden}
.pick-main .thumb{border-radius:0;aspect-ratio:16/9}
.pick-main .pick-body{padding:24px 26px 26px}
.pick-main h3{font-size:21px;font-weight:600;color:var(--ink-900);margin:14px 0 10px;line-height:1.5}
.pick-main h3 a{color:var(--ink-900)}
.pick-main h3 a:hover{color:var(--brand-600)}
.pick-main p{font-size:15px;color:var(--ink-500);line-height:1.75}
.pick-side{display:grid;gap:26px}
.pick-mini{display:flex;gap:16px;padding:18px;align-items:flex-start}
.pick-mini .thumb{width:104px;height:104px;flex:0 0 auto}
.pick-mini h3{font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5;margin-bottom:8px}
.pick-mini h3 a{color:var(--ink-900)}
.pick-mini h3 a:hover{color:var(--brand-600)}
.pick-mini p{font-size:13px;color:var(--ink-500);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.meta-row{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--ink-500);margin-top:12px;flex-wrap:wrap}
.meta-dot{width:3px;height:3px;border-radius:50%;background:var(--line)}

/* ============ 资讯列表 ============ */
.news-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.row-card{
  display:flex;gap:16px;padding:18px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);transition:background-color .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.row-card:hover{background:var(--bg);box-shadow:var(--sh-1);border-color:#D6E6F1}
.row-card .thumb{width:120px;height:80px;flex:0 0 auto;border-radius:10px}
.row-card .rc-title{font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.row-card .rc-title a{color:var(--ink-900)}
.row-card .rc-title a:hover{color:var(--brand-600)}
.row-card .rc-desc{font-size:13px;color:var(--ink-500);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.row-card .rc-meta{display:flex;align-items:center;gap:10px;margin-top:8px;font-size:12px;color:var(--ink-500)}
.empty-state{
  grid-column:1/-1;background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);
  padding:46px 24px;text-align:center;color:var(--ink-500);
}
.empty-state .es-ico{color:var(--brand-600);display:flex;justify-content:center;margin-bottom:12px}
.empty-state p{font-size:15px;margin-bottom:16px}

/* ============ 信任背书 ============ */
.trust{background:var(--brand-100)}
.trust-strip{
  background:#fff;border:1px solid #D3E5F2;border-radius:var(--r-card);
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;overflow:hidden;margin-bottom:34px;
}
.trust-strip .ts-item{padding:22px 24px;border-right:1px solid var(--line)}
.trust-strip .ts-item:last-child{border-right:none}
.trust-strip .ts-num{font-size:24px;font-weight:600;color:var(--brand-700);font-variant-numeric:tabular-nums;line-height:1.3}
.trust-strip .ts-lab{font-size:13px;color:var(--ink-500);margin-top:4px}
.trust-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust-card{background:#fff;border-radius:14px;padding:22px;border:1px solid #DCEAF5}
.trust-card .tc-quote{font-size:14px;color:var(--ink-700);line-height:1.75;min-height:74px}
.trust-card .tc-from{font-size:12px;color:var(--ink-500);margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}

/* ============ FAQ ============ */
.faq-accordion .accordion-item{background:transparent;border:none;margin-bottom:12px;border-radius:12px;overflow:hidden}
.faq-accordion .accordion-button{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  font-size:17px;font-weight:500;color:var(--ink-900);padding:18px 56px 18px 22px;
  box-shadow:none;line-height:1.6;
}
.faq-accordion .accordion-button:not(.collapsed){
  background:#fff;color:var(--brand-700);box-shadow:var(--sh-1);
  border-color:#D6E6F1;border-left:3px solid var(--brand-600);border-radius:12px;
}
.faq-accordion .accordion-button:focus{box-shadow:var(--focus);border-color:var(--brand-600)}
.faq-accordion .accordion-button::after{
  background-image:none;content:"";width:9px;height:9px;margin-left:auto;
  border-right:1.6px solid var(--brand-600);border-bottom:1.6px solid var(--brand-600);
  transform:rotate(45deg);transition:transform .22s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after{transform:rotate(-135deg)}
.faq-accordion .accordion-body{
  font-size:15px;line-height:1.85;color:var(--ink-500);background:#fff;
  padding:16px 22px 22px;border-left:3px solid var(--brand-600);
}

/* ============ 订阅 CTA ============ */
.cta-band{background:var(--ink-900);color:#fff}
.cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;padding:64px 0}
.cta-inner h2{font-size:clamp(22px,3vw,30px);font-weight:600;color:#fff;margin-bottom:14px}
.cta-inner p{font-size:15px;color:#A9C0CF;line-height:1.8}
.cta-form .form-label{display:block;font-size:14px;color:#A9C0CF;margin-bottom:8px}
.cta-form .form-row{display:flex;gap:12px}
.cta-form input[type="email"]{
  flex:1;height:48px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid #27455C;background:#153044;color:#fff;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.cta-form input[type="email"]::placeholder{color:#6E8B9E}
.cta-form input[type="email"]:focus{outline:none;border-color:var(--brand-600);box-shadow:var(--focus)}
.cta-form.has-error input[type="email"]{border-color:var(--danger)}
.form-tip{font-size:13px;color:#A9C0CF;margin-top:10px;min-height:20px}
.form-tip.is-error{color:#FF9C8A}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:#A9C0CF}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding:64px 0 44px}
.site-footer .brand-text strong{color:#fff}
.site-footer .brand-text em{color:#7E9AAC}
.site-footer .brand-mark{background:#17344A;color:#7FC0E8}
.footer-brand p{font-size:14px;line-height:1.8;color:#A9C0CF;margin-top:18px;max-width:320px}
.footer-social{display:flex;gap:12px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;border-radius:10px;border:1px solid #23415A;
  display:flex;align-items:center;justify-content:center;color:#A9C0CF;
  transition:background-color .16s ease,color .16s ease,border-color .16s ease;
}
.footer-social a:hover{background:#17344A;color:#fff;border-color:#2E5573}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px}
.footer-col ul li{margin-bottom:12px}
.footer-col ul li a{font-size:14px;color:#A9C0CF;transition:color .16s ease}
.footer-col ul li a:hover{color:#fff}
.footer-cta p{font-size:14px;line-height:1.8;margin-bottom:16px}
.footer-form .form-row{display:flex;gap:10px}
.footer-form input[type="email"]{
  flex:1;height:44px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid #27455C;background:#153044;color:#fff;
}
.footer-form input[type="email"]:focus{outline:none;border-color:var(--brand-600);box-shadow:var(--focus)}
.footer-form.has-error input[type="email"]{border-color:var(--danger)}
.footer-form .btn{height:44px;padding:0 18px;font-size:14px}
.footer-form .form-tip{font-size:12px;color:#8FA9BA;margin-top:8px;min-height:18px}
.footer-form .form-tip.is-error{color:#FF9C8A}
.footer-bottom{border-top:1px solid #1D3A52}
.footer-bottom-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:13px;color:#8FA9BA;flex-wrap:wrap;
}
.footer-bottom-inner ul{display:flex;gap:22px;flex-wrap:wrap}
.footer-bottom-inner ul a{font-size:13px;color:#8FA9BA}
.footer-bottom-inner ul a:hover{color:#fff}

/* ============ 移动抽屉 ============ */
.mobile-drawer{
  position:fixed;inset:0;z-index:1060;background:rgba(15,36,54,.46);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
}
.mobile-drawer.open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(86vw,360px);background:#fff;
  display:flex;flex-direction:column;padding:20px 20px 26px;
  transform:translateX(100%);transition:transform .28s ease;overflow-y:auto;
}
.mobile-drawer.open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{
  width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:10px;
  color:var(--ink-700);display:flex;align-items:center;justify-content:center;
}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{
  display:flex;align-items:center;height:48px;font-size:16px;color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.drawer-nav a[aria-current="page"]{color:var(--brand-600);font-weight:500}
.drawer-cta{margin-top:22px;width:100%}
body.no-scroll{overflow:hidden}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .36s ease,transform .36s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .trust-cards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:991px){
  .main-nav{display:none}
  .nav-burger{display:block}
  .nav-actions .btn-primary{display:none}
  .hero{padding:52px 0 60px}
  .hero-grid{gap:32px}
  .hero-copy,.hero-visual{grid-column:span 12}
  .hero-visual{order:-1}
  .hero-float{left:12px;bottom:12px;max-width:250px}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .grid-3,.picks{grid-template-columns:1fr}
  .story{grid-template-columns:1fr;gap:32px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step-line{display:none}
  .news-list{grid-template-columns:1fr}
  .cta-inner{grid-template-columns:1fr;gap:28px;padding:52px 0}
  .trust-strip{grid-template-columns:repeat(2,1fr)}
  .trust-strip .ts-item:nth-child(2){border-right:none}
  .trust-strip .ts-item:nth-child(1),.trust-strip .ts-item:nth-child(2){border-bottom:1px solid var(--line)}
}
@media (max-width:767px){
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px}
  .entry-grid{grid-template-columns:1fr}
  .metrics{grid-template-columns:repeat(3,1fr);gap:12px}
  .metric .m-num{font-size:22px}
  .trust-cards{grid-template-columns:1fr}
  .cta-form .form-row{flex-direction:column}
  .cta-form .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom-inner{flex-direction:column;text-align:center;gap:12px}
  .footer-bottom-inner ul{justify-content:center;gap:16px}
}
@media (max-width:575px){
  .wrap{padding:0 20px}
  .hero h1{font-size:28px}
  .section{padding:40px 0}
  .steps{grid-template-columns:1fr}
  .pick-mini{flex-direction:column}
  .pick-mini .thumb{width:100%;height:160px}
  .row-card{flex-direction:column}
  .row-card .thumb{width:100%;height:160px}
  .hero-btns .btn{width:100%}
  .brand-text em{display:none}
}

/* roulang page: category1 */
:root{
  --brand-600:#1B6FA8;
  --brand-700:#14567F;
  --brand-100:#E7F1F8;
  --accent-500:#FF7A45;
  --accent-600:#F2662F;
  --ink-900:#0F2436;
  --ink-700:#2C4658;
  --ink-500:#5A7286;
  --line:#E2ECF3;
  --bg:#F6FAFD;
  --surface:#FFFFFF;
  --ok:#1FA97F;
  --danger:#D64545;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 6px 24px rgba(15,36,54,.06);
  --shadow-2:0 12px 32px rgba(15,36,54,.10);
  --shadow-nav:0 2px 12px rgba(15,36,54,.06);
  --space-section:80px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:600;letter-spacing:0;line-height:1.35;}
p{margin:0;}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-700);}
img{max-width:100%;display:block;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(27,111,168,.28);outline-offset:2px;border-radius:6px;}

.wrap{width:100%;max-width:1140px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.wrap{max-width:1240px;}}
@media (max-width:1199px){.wrap{max-width:960px;}}
@media (max-width:575px){.wrap{padding:0 20px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.scrolled{box-shadow:var(--shadow-nav);}
.header-inner{display:flex;align-items:center;gap:28px;height:78px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--brand-600);background:var(--brand-100);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:16px;font-weight:700;color:var(--ink-900);}
.brand-text em{font-size:12px;font-style:normal;color:var(--ink-500);letter-spacing:.5px;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;
  font-size:15px;color:var(--ink-700);border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--brand-600);border-radius:2px;
  transform:scaleX(0);transform-origin:center;transition:transform .18s ease;
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-100);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--brand-600);font-weight:500;}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}

.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;line-height:1;cursor:pointer;border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-main{background:var(--accent-500);color:#fff;box-shadow:0 6px 18px rgba(255,122,69,.22);}
.btn-main:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,122,69,.28);}
.btn-main:active{transform:translateY(0);box-shadow:0 4px 12px rgba(255,122,69,.2);}
.btn-ghost{background:var(--surface);color:var(--brand-600);border-color:var(--brand-600);}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-700);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:500;color:var(--brand-600);
}
.btn-text svg{transition:transform .2s ease;}
.btn-text:hover svg{transform:translateX(4px);}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);color:var(--ink-700);align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand-600);color:var(--brand-600);}
.drawer{
  position:fixed;inset:78px 0 0 0;background:var(--surface);z-index:1029;
  transform:translateY(-8px);opacity:0;visibility:hidden;
  transition:opacity .24s ease,transform .24s ease,visibility .24s;
  overflow-y:auto;padding:16px 0 120px;
  border-top:1px solid var(--line);
}
.drawer.open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer .nav-link{display:block;padding:14px 24px;font-size:16px;border-radius:0;height:auto;}
.drawer .nav-link::after{display:none;}
.drawer .nav-link[aria-current="page"]{background:var(--brand-100);}
.drawer-cta{position:fixed;left:0;right:0;bottom:0;padding:14px 20px;background:var(--surface);border-top:1px solid var(--line);}
.drawer-cta .btn-main{width:100%;}
body.drawer-open{overflow:hidden;}

/* ============ 内页横幅 ============ */
.page-banner{
  position:relative;overflow:hidden;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  padding:44px 0 56px;
}
.page-banner::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(27,111,168,.14) 1px,transparent 1px);
  background-size:20px 20px;
  opacity:.55;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 78%);
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 78%);
}
.banner-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;}
.breadcrumb-bar{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:18px;flex-wrap:wrap;}
.breadcrumb-bar a{color:var(--ink-500);}
.breadcrumb-bar a:hover{color:var(--brand-600);}
.breadcrumb-bar span.sep{color:#B9CEDA;}
.page-banner h1{font-size:clamp(28px,4.2vw,44px);font-weight:600;margin-bottom:14px;}
.banner-lead{font-size:16px;color:var(--ink-500);max-width:520px;margin-bottom:26px;}
.banner-actions{display:flex;gap:12px;flex-wrap:wrap;}
.banner-media{position:relative;}
.banner-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:20px;box-shadow:var(--shadow-2);background:#EEF4F9;
}
.banner-note{
  position:absolute;left:18px;bottom:18px;
  display:flex;align-items:center;gap:10px;
  background:rgba(255,255,255,.94);
  border:1px solid var(--line);border-radius:12px;
  padding:10px 14px;font-size:13px;color:var(--ink-700);
  box-shadow:var(--shadow-1);
}
.banner-note svg{color:var(--brand-600);flex-shrink:0;}

/* ============ 通用板块 ============ */
.section{padding:var(--space-section) 0;}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;}
.section-head h2{font-size:clamp(22px,3vw,32px);}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:500;letter-spacing:.6px;
  color:var(--brand-600);background:var(--brand-100);
  border-radius:999px;padding:5px 12px;margin-bottom:12px;
}
.section-lead{font-size:15px;color:var(--ink-500);margin-top:8px;max-width:620px;}

/* ============ 筛选标签 ============ */
.filter-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.tag-chip{
  display:inline-flex;align-items:center;gap:6px;
  height:36px;padding:0 16px;border-radius:999px;
  font-size:13px;color:var(--ink-700);
  background:var(--surface);border:1px solid var(--line);
  transition:all .18s ease;cursor:pointer;
}
.tag-chip:hover{border-color:var(--brand-600);color:var(--brand-600);}
.tag-chip.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;}

/* ============ 卡片 ============ */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);overflow:hidden;
  transition:box-shadow .32s ease,transform .32s ease;
  height:100%;
}
.card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.card-media{overflow:hidden;background:#EEF4F9;}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .32s ease;}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:24px 26px 26px;}
.card-body h3{font-size:19px;margin-bottom:10px;line-height:1.45;}
.card-body p{font-size:14px;color:var(--ink-500);line-height:1.75;}
.card-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--ink-500);margin-top:16px;}
.badge-soft{
  display:inline-block;font-size:12px;line-height:1;
  padding:6px 11px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-600);font-weight:500;
}
.divider{width:1px;height:12px;background:var(--line);display:inline-block;}

.feature-wide{grid-column:1 / -1;display:grid;grid-template-columns:1fr 1fr;}
.feature-wide .card-media{height:100%;}
.feature-wide .card-media img{height:100%;aspect-ratio:auto;min-height:280px;}
.feature-wide .card-body{padding:36px 40px;display:flex;flex-direction:column;justify-content:center;}
.feature-wide .card-body h3{font-size:24px;}
.feature-wide .card-body p{font-size:15px;}
.grid-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.tag-line{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px;}

/* ============ 数据条 ============ */
.stats-band{
  background:var(--brand-100);border-radius:20px;
  padding:34px 40px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.stat{display:flex;flex-direction:column;gap:4px;}
.stat strong{font-size:clamp(24px,3vw,32px);font-weight:700;color:var(--accent-500);line-height:1.2;}
.stat span{font-size:14px;color:var(--ink-700);}
.stat em{font-size:13px;font-style:normal;color:var(--ink-500);}

/* ============ 功能矩阵 ============ */
.matrix-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.matrix-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-1);transition:box-shadow .3s ease,transform .3s ease;
  height:100%;
}
.matrix-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.matrix-icon{
  width:42px;height:42px;border-radius:12px;background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.matrix-card h3{font-size:17px;margin-bottom:8px;}
.matrix-card p{font-size:14px;color:var(--ink-500);line-height:1.75;}

/* ============ 流程 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;}
.step{padding:0 22px;position:relative;}
.step:first-child{padding-left:0;}
.step::before{
  content:"";position:absolute;left:0;top:19px;width:calc(100% - 44px);height:1px;
  background:var(--line);z-index:0;
}
.step:last-child::before{display:none;}
.step-num{
  position:relative;z-index:1;
  width:38px;height:38px;border-radius:50%;
  background:var(--surface);border:1px solid var(--brand-600);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:600;margin-bottom:18px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--ink-500);line-height:1.75;}

/* ============ FAQ ============ */
.faq{max-width:900px;}
.faq .accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;
}
.faq .accordion-header{margin:0;}
.faq .accordion-button{
  width:100%;background:transparent;border:0;box-shadow:none;
  padding:20px 44px 20px 18px;font-size:17px;font-weight:500;color:var(--ink-900);
  text-align:left;position:relative;border-radius:0;
}
.faq .accordion-button::after{
  content:"";position:absolute;right:14px;top:50%;
  width:14px;height:14px;margin:0;transform:translateY(-50%) rotate(45deg);
  background:none;
  border-right:1.6px solid var(--ink-500);border-bottom:1.6px solid var(--ink-500);
  transition:transform .2s ease,border-color .2s ease;
  background-image:none !important;
}
.faq .accordion-button.collapsed::after{transform:translateY(-70%) rotate(45deg);}
.faq .accordion-button:not(.collapsed){color:var(--brand-600);background:var(--surface);}
.faq .accordion-button:not(.collapsed)::after{border-color:var(--brand-600);transform:translateY(-30%) rotate(225deg);}
.faq .accordion-button:hover{background:var(--surface);color:var(--brand-600);}
.faq .accordion-button:focus{box-shadow:none;}
.faq .accordion-body{
  padding:0 44px 22px 18px;font-size:15px;color:var(--ink-500);line-height:1.8;
}
.faq .accordion-collapse{background:var(--surface);}
.faq .accordion-item:has(.accordion-button:not(.collapsed)){
  border-left:3px solid var(--brand-600);border-radius:8px;
}

/* ============ CTA ============ */
.cta-band{
  background:var(--brand-100);border:1px solid var(--line);border-radius:20px;
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(20px,2.6vw,26px);margin-bottom:8px;}
.cta-band p{font-size:15px;color:var(--ink-500);max-width:560px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:#A9C0CF;padding:64px 0 0;margin-top:var(--space-section);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text em{color:#8FAAB9;}
.footer-brand .brand-mark{background:rgba(231,241,248,.12);color:#BFE0F5;}
.footer-brand p{font-size:14px;line-height:1.85;margin-top:16px;color:#A9C0CF;}
.footer-social{display:flex;gap:10px;margin-top:20px;}
.footer-social a{
  width:38px;height:38px;border-radius:10px;
  border:1px solid rgba(169,192,207,.28);color:#A9C0CF;
  display:flex;align-items:center;justify-content:center;
  transition:all .16s ease;
}
.footer-social a:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.45);}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-col ul li{margin-bottom:11px;}
.footer-col a{font-size:14px;color:#A9C0CF;transition:color .16s ease;}
.footer-col a:hover{color:#fff;}
.footer-col p{font-size:14px;line-height:1.8;}
.footer-form{display:flex;gap:8px;margin-top:14px;}
.footer-form input{
  flex:1;min-width:0;height:44px;border-radius:10px;padding:0 14px;
  border:1px solid rgba(169,192,207,.3);background:rgba(255,255,255,.06);
  color:#fff;font-size:14px;
}
.footer-form input::placeholder{color:#8FAAB9;}
.footer-form input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(27,111,168,.28);}
.footer-form button{
  height:44px;padding:0 18px;border-radius:10px;border:0;cursor:pointer;
  background:var(--accent-500);color:#fff;font-size:14px;font-weight:500;
  transition:background .18s ease;
}
.footer-form button:hover{background:var(--accent-600);}
.form-hint{font-size:13px;color:#8FAAB9;margin-top:8px;}
.form-hint.err{color:#FFB4A2;}
.footer-bottom{
  margin-top:52px;border-top:1px solid rgba(169,192,207,.18);
  padding:22px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:#8FAAB9;}
.footer-links{display:flex;gap:18px;}
.footer-links a{font-size:13px;color:#8FAAB9;}
.footer-links a:hover{color:#fff;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .matrix-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);gap:32px 0;}
  .step:nth-child(2)::before{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:991px){
  :root{--space-section:56px;}
  .main-nav,.header-actions .btn-main{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{height:72px;}
  .drawer{inset:72px 0 0 0;}
  .banner-grid{grid-template-columns:1fr;gap:32px;}
  .banner-media{order:-1;}
  .feature-wide{grid-template-columns:1fr;}
  .feature-wide .card-media img{min-height:220px;}
  .feature-wide .card-body{padding:28px 26px;}
  .stats-band{grid-template-columns:repeat(3,1fr);padding:28px;gap:16px;}
  .cta-band{padding:32px 28px;}
}
@media (max-width:767px){
  .grid-cards{grid-template-columns:1fr;}
  .matrix-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;gap:26px;}
  .step{padding:0;}
  .step::before{display:none;}
  .stats-band{grid-template-columns:1fr;text-align:left;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .banner-lead{font-size:15px;}
}
@media (max-width:575px){
  :root{--space-section:40px;}
  .page-banner{padding:32px 0 44px;}
  .btn-main,.btn-ghost{width:100%;}
  .banner-actions{flex-direction:column;}
  .cta-actions{width:100%;flex-direction:column;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{justify-content:center;text-align:center;}
  .footer-form{flex-direction:column;}
  .footer-form button{width:100%;}
  .faq .accordion-button{padding:18px 40px 18px 12px;font-size:16px;}
  .faq .accordion-body{padding:0 40px 20px 12px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: article */
:root{
  --brand-600:#1B6FA8;
  --brand-700:#14567F;
  --brand-100:#E7F1F8;
  --accent-500:#FF7A45;
  --accent-600:#F0682F;
  --ink-900:#0F2436;
  --ink-700:#2C4658;
  --ink-500:#5A7286;
  --line:#E2ECF3;
  --bg:#F6FAFD;
  --surface:#FFFFFF;
  --ok:#1FA97F;
  --danger:#D64545;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 6px 24px rgba(15,36,54,.06);
  --shadow-2:0 12px 32px rgba(15,36,54,.10);
  --shadow-nav:0 2px 12px rgba(15,36,54,.06);
  --wrap:1200px;
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-600);text-decoration:none;transition:color .16s ease}
a:hover{color:var(--brand-700)}
button{font-family:inherit}
ul,ol{padding-left:0}
h1,h2,h3,h4,h5{margin:0;color:var(--ink-900);font-weight:600;letter-spacing:0}
p{margin:0}
:focus-visible{outline:3px solid rgba(27,111,168,.28);outline-offset:2px;border-radius:6px}

/* ---------- 容器 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-nav)}
.header-inner{display:flex;align-items:center;gap:28px;height:78px}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:var(--ink-900)}
.brand-mark{
  width:40px;height:40px;border-radius:11px;
  background:var(--brand-100);color:var(--brand-600);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;color:var(--ink-900)}
.brand-text em{font-style:normal;font-size:12px;color:var(--ink-500);letter-spacing:.06em;margin-top:2px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;
  padding:9px 12px;
  font-size:15px;
  color:var(--ink-700);
  border-radius:8px;
  transition:color .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--brand-600);border-radius:2px;
  transform:scaleX(0);transform-origin:center;transition:transform .18s ease;
}
.nav-link:hover{color:var(--brand-600)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--brand-600);font-weight:500}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.header-cta{
  display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 18px;border-radius:var(--radius-btn);
  background:var(--accent-500);color:#fff;font-size:15px;font-weight:500;
  white-space:nowrap;transition:background .18s ease,transform .18s ease,box-shadow .18s ease;
}
.header-cta:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(255,122,69,.28)}
.header-cta:active{transform:translateY(0);box-shadow:none}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:var(--surface);
  border-radius:10px;color:var(--ink-700);place-items:center;cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand-600);color:var(--brand-600)}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;inset:0;background:var(--surface);z-index:1200;
  display:flex;flex-direction:column;
  transform:translateX(100%);visibility:hidden;
  transition:transform .3s ease,visibility .3s ease;
}
.drawer.is-open{transform:translateX(0);visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.drawer-close{width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink-700);display:grid;place-items:center;cursor:pointer}
.drawer-close:hover{border-color:var(--brand-600);color:var(--brand-600)}
.drawer-nav{flex:1 1 auto;overflow-y:auto;padding:10px 12px}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 14px;font-size:16px;color:var(--ink-700);
  border-radius:10px;
}
.drawer-nav a:hover{background:var(--brand-100);color:var(--brand-600)}
.drawer-foot{padding:16px 20px 26px;border-top:1px solid var(--line)}
.drawer-foot .header-cta{width:100%;justify-content:center;height:48px;font-size:16px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;line-height:1;cursor:pointer;
  border:1px solid transparent;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--accent-500);color:#fff}
.btn-primary:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(255,122,69,.28)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:var(--surface);color:var(--brand-600);border-color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-700)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:500;color:var(--brand-600);
}
.btn-text svg{transition:transform .2s ease}
.btn-text:hover svg{transform:translateX(4px)}
.btn-block{width:100%}

/* ---------- 徽章 ---------- */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-600);
  font-size:12px;font-weight:500;white-space:nowrap;
}
.badge-ok{background:rgba(31,169,127,.12);color:var(--ok)}

/* ---------- 页头 ---------- */
.page-head{
  background:var(--surface);
  border-bottom:1px solid var(--line);
  padding:26px 0 34px;
}
.breadcrumb-line{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);flex-wrap:wrap}
.breadcrumb-line a{color:var(--ink-500)}
.breadcrumb-line a:hover{color:var(--brand-600)}
.breadcrumb-line .sep{color:#B7CBD8}
.breadcrumb-line .current{
  color:var(--ink-700);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.page-title{
  font-size:clamp(26px,3.6vw,38px);
  line-height:1.35;margin:16px 0 0;color:var(--ink-900);font-weight:600;
  max-width:920px;
}
.page-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:16px;font-size:14px;color:var(--ink-500)}
.page-meta .dot{width:4px;height:4px;border-radius:50%;background:#B7CBD8}

/* ---------- 文章布局 ---------- */
.article-shell{padding:48px 0 72px}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:52px;
  align-items:start;
}
.article-main{min-width:0;max-width:820px}
.article-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:36px 40px 40px;
}
.article-body{font-size:17px;line-height:1.9;color:var(--ink-700);word-wrap:break-word}
.article-body p{margin:0 0 18px}
.article-body h2{
  position:relative;font-size:24px;line-height:1.45;color:var(--ink-900);
  margin:38px 0 16px;padding-left:15px;font-weight:600;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;
  border-radius:2px;background:var(--brand-600);
}
.article-body h3{font-size:20px;line-height:1.5;color:var(--ink-900);margin:28px 0 12px;font-weight:600}
.article-body h4{font-size:17px;color:var(--ink-900);margin:22px 0 10px;font-weight:600}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px}
.article-body li{margin-bottom:8px;line-height:1.8}
.article-body strong{color:var(--ink-900);font-weight:600}
.article-body blockquote{
  margin:22px 0;padding:18px 22px;
  background:var(--brand-100);border-left:4px solid var(--brand-600);
  border-radius:0 var(--radius-img) var(--radius-img) 0;color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  border-radius:var(--radius-img);margin:22px 0;width:100%;height:auto;
  background:#EEF4F9;
}
.article-body figure{margin:22px 0}
.article-body figcaption{font-size:13px;color:var(--ink-500);text-align:center;margin-top:10px}
.article-body table{
  width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;
  display:block;overflow-x:auto;white-space:nowrap;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left}
.article-body th{background:var(--brand-100);color:var(--ink-900);font-weight:600}
.article-body code{
  background:#F2F7FB;color:var(--brand-700);
  padding:2px 7px;border-radius:6px;font-size:15px;
}
.article-body pre{
  background:#F2F7FB;border:1px solid var(--line);border-radius:var(--radius-img);
  padding:18px;overflow-x:auto;margin:22px 0;
}
.article-body pre code{background:none;padding:0}
.article-body a{color:var(--brand-600);text-decoration:underline;text-decoration-color:rgba(27,111,168,.35)}
.article-body a:hover{color:var(--brand-700)}

/* 空态 */
.article-empty{text-align:center;padding:56px 24px 48px}
.article-empty .empty-icon{
  width:64px;height:64px;border-radius:18px;margin:0 auto 20px;
  background:var(--brand-100);color:var(--brand-600);display:grid;place-items:center;
}
.article-empty h2{font-size:22px;color:var(--ink-900);margin-bottom:12px}
.article-empty p{font-size:15px;color:var(--ink-500);max-width:460px;margin:0 auto 24px;line-height:1.8}

/* ---------- 标签行 ---------- */
.tag-row{
  margin-top:28px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.tag-row .tag-label{font-size:14px;color:var(--ink-500);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  border-radius:999px;background:var(--brand-100);color:var(--brand-600);
  font-size:13px;transition:background .16s ease,color .16s ease;
}
.tag:hover{background:var(--brand-600);color:#fff}

/* ---------- 文末导航卡 ---------- */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:34px}
.post-nav-card{
  display:flex;flex-direction:column;gap:8px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px 22px;box-shadow:var(--shadow-1);
  transition:box-shadow .3s ease,transform .3s ease,border-color .3s ease;
}
.post-nav-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#CFE3F0}
.post-nav-card .pn-label{font-size:13px;color:var(--ink-500);display:flex;align-items:center;gap:6px}
.post-nav-card .pn-title{font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5}
.post-nav-card .pn-time{font-size:13px;color:var(--ink-500)}

/* ---------- 相关推荐 ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.section-head h2{font-size:clamp(22px,3vw,32px);line-height:1.35;color:var(--ink-900)}
.section-head .sub{font-size:15px;color:var(--ink-500);margin-top:8px}
.rec-block{margin-top:44px}
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.rec-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:box-shadow .32s ease,transform .32s ease;
}
.rec-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.rec-thumb{aspect-ratio:16/9;overflow:hidden;background:#EEF4F9}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease}
.rec-card:hover .rec-thumb img{transform:scale(1.03)}
.rec-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.rec-body h3{font-size:17px;line-height:1.5;color:var(--ink-900)}
.rec-body p{font-size:14px;color:var(--ink-500);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rec-meta{font-size:13px;color:var(--ink-500);margin-top:auto}

/* ---------- 侧栏 ---------- */
.article-side{position:relative}
.side-sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:22px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);padding:22px;
}
.side-card h3{
  font-size:15px;color:var(--ink-900);font-weight:600;
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.side-card h3 svg{color:var(--brand-600);flex:0 0 auto}
.toc-list{list-style:none;margin:0;padding:0;counter-reset:toc}
.toc-list li{counter-increment:toc}
.toc-list a{
  display:block;padding:8px 10px;font-size:14px;color:var(--ink-700);
  border-radius:8px;border-left:2px solid transparent;line-height:1.6;
  transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.toc-list a::before{
  content:counter(toc,decimal-leading-zero);
  color:#B7CBD8;font-size:12px;margin-right:8px;
}
.toc-list a:hover,.toc-list a.is-active{
  background:var(--brand-100);color:var(--brand-600);border-left-color:var(--brand-600);
}
.toc-empty{font-size:14px;color:var(--ink-500);line-height:1.8}
.mini-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.mini-list li{display:flex;gap:12px;align-items:flex-start}
.mini-list .mini-thumb{
  width:64px;height:48px;border-radius:8px;overflow:hidden;flex:0 0 auto;background:#EEF4F9;
}
.mini-list .mini-thumb img{width:100%;height:100%;object-fit:cover}
.mini-list a{font-size:14px;color:var(--ink-700);line-height:1.6;display:block}
.mini-list a:hover{color:var(--brand-600)}
.mini-list .mini-time{font-size:12px;color:var(--ink-500);margin-top:4px;display:block}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud a{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border-radius:999px;background:var(--bg);border:1px solid var(--line);
  font-size:13px;color:var(--ink-700);transition:all .16s ease;
}
.tag-cloud a:hover{background:var(--brand-100);border-color:var(--brand-100);color:var(--brand-600)}
.side-cta{
  background:linear-gradient(160deg,var(--brand-600) 0%,var(--brand-700) 100%);
  border:none;color:#EAF3F9;
}
.side-cta h3{color:#fff}
.side-cta h3 svg{color:#fff}
.side-cta p{font-size:14px;line-height:1.8;color:#CFE3F0;margin-bottom:16px}
.side-cta .btn{height:44px;font-size:14px}

/* ---------- CTA 通栏 ---------- */
.cta-band{
  background:var(--ink-900);
  color:#C9DBE7;
  border-radius:20px;
  padding:44px 46px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  margin-top:60px;
}
.cta-band h2{color:#fff;font-size:clamp(20px,2.4vw,26px);line-height:1.4}
.cta-band p{font-size:15px;color:#A9C0CF;margin-top:10px;max-width:520px;line-height:1.8}
.cta-band .cta-actions{display:flex;gap:14px;flex:0 0 auto}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.32)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.6)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:#A9C0CF;margin-top:80px;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:48px}
.site-footer .brand{color:#fff}
.site-footer .brand-mark{background:rgba(255,255,255,.08);color:#8FC6E8}
.site-footer .brand-text strong{color:#fff}
.site-footer .brand-text em{color:#8CA6B7}
.footer-brand p{font-size:14px;line-height:1.85;color:#A9C0CF;margin-top:16px;max-width:330px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:36px;height:36px;border-radius:10px;
  border:1px solid rgba(255,255,255,.14);color:#A9C0CF;
  display:grid;place-items:center;transition:all .16s ease;
}
.footer-social a:hover{border-color:rgba(255,255,255,.5);color:#fff;background:rgba(255,255,255,.06)}
.footer-col h4{font-size:15px;color:#fff;font-weight:600;margin-bottom:18px}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:14px;color:#A9C0CF;transition:color .16s ease}
.footer-col a:hover{color:#fff}
.footer-sub p{font-size:14px;line-height:1.85;color:#A9C0CF;margin-bottom:16px}
.footer-form{display:flex;gap:10px;flex-wrap:wrap}
.footer-form input{
  flex:1 1 160px;height:46px;padding:0 14px;border-radius:10px;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);
  color:#fff;font-size:14px;outline:none;transition:border-color .16s ease,box-shadow .16s ease;
}
.footer-form input::placeholder{color:#7E9AAC}
.footer-form input:focus{border-color:#8FC6E8;box-shadow:0 0 0 3px rgba(143,198,232,.22)}
.footer-form .btn{height:46px;padding:0 20px;font-size:14px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:#8CA6B7;
}
.footer-bottom .fb-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom a{color:#8CA6B7}
.footer-bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1399px){
  .article-layout{gap:40px}
}
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-main{max-width:none}
  .article-side{display:none}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-sub{grid-column:1 / -1}
}
@media (max-width:991px){
  .main-nav{display:none}
  .header-cta{display:none}
  .nav-toggle{display:grid}
  .header-inner{gap:16px}
  .page-head{padding:20px 0 28px}
  .article-panel{padding:28px 26px 32px}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px 30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
  .article-shell{padding:32px 0 56px}
  .article-body{font-size:16px;line-height:1.9}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:18px}
  .post-nav{grid-template-columns:1fr}
  .rec-grid{grid-template-columns:1fr}
  .site-footer{padding-top:48px}
  .site-footer .wrap{padding:0 20px}
}
@media (max-width:575px){
  .wrap{padding:0 20px}
  .article-panel{padding:22px 18px 26px;border-radius:14px}
  .page-title{font-size:28px}
  .breadcrumb-line .current{max-width:180px}
  .cta-band{padding:28px 22px;border-radius:16px}
  .cta-band .cta-actions{width:100%;flex-direction:column}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{justify-content:center;text-align:center}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category3 */
:root{
  --brand-600:#1B6FA8;
  --brand-700:#14567F;
  --brand-100:#E7F1F8;
  --accent-500:#FF7A45;
  --accent-600:#F0682F;
  --ink-900:#0F2436;
  --ink-700:#2C4658;
  --ink-500:#5A7286;
  --line:#E2ECF3;
  --bg:#F6FAFD;
  --surface:#FFFFFF;
  --ok:#1FA97F;
  --danger:#D64545;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 6px 24px rgba(15,36,54,.06);
  --sh-2:0 12px 32px rgba(15,36,54,.10);
  --sh-nav:0 2px 12px rgba(15,36,54,.06);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-700);}
img{max-width:100%;display:block;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:600;letter-spacing:0;line-height:1.35;}
p{margin:0 0 16px;}
ul,ol{margin:0 0 16px;padding-left:20px;}
li{margin-bottom:8px;}
:focus-visible{outline:3px solid rgba(27,111,168,.28);outline-offset:2px;border-radius:6px;}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.wrap{max-width:1240px;}}
@media (min-width:1200px) and (max-width:1399px){.wrap{max-width:1140px;}}
@media (min-width:992px) and (max-width:1199px){.wrap{max-width:960px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-nav);}
.header-inner{
  height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink-900);flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;background:var(--brand-100);color:var(--brand-600);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-text strong{display:block;font-size:17px;font-weight:600;line-height:1.2;color:var(--ink-900);}
.brand-text em{display:block;font-size:12px;font-style:normal;color:var(--ink-500);line-height:1.4;}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-link{
  position:relative;padding:10px 14px;font-size:15px;color:var(--ink-700);
  border-radius:8px;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.nav-link:hover{color:var(--brand-600);}
.nav-link:hover::after,.nav-link[aria-current="page"]::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--brand-600);font-weight:500;}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:500;
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn-accent{background:var(--accent-500);color:#fff;box-shadow:0 4px 14px rgba(255,122,69,.28);}
.btn-accent:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(255,122,69,.32);}
.btn-accent:active{transform:none;box-shadow:0 3px 10px rgba(255,122,69,.24);}
.btn-outline{background:#fff;border-color:var(--brand-600);color:var(--brand-600);}
.btn-outline:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-700);transform:translateY(-1px);}
.btn-outline:active{transform:none;}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn-link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--brand-600);
  background:none;border:none;padding:0;cursor:pointer;
}
.btn-link-arrow svg{transition:transform .18s ease;}
.btn-link-arrow:hover svg{transform:translateX(4px);}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink-700);align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--brand-100);color:var(--brand-600);border-color:var(--brand-100);}

/* drawer */
.nav-drawer{width:min(340px,86vw);border:none;}
.nav-drawer .offcanvas-header{padding:20px 22px;border-bottom:1px solid var(--line);}
.nav-drawer .offcanvas-header .drawer-title{font-size:16px;font-weight:600;color:var(--ink-900);}
.nav-drawer .offcanvas-body{padding:14px 22px 26px;display:flex;flex-direction:column;}
.drawer-link{
  display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:10px;
  font-size:16px;color:var(--ink-700);border-bottom:1px solid var(--line);
}
.drawer-link:last-of-type{border-bottom:none;}
.drawer-link:hover,.drawer-link[aria-current="page"]{background:var(--brand-100);color:var(--brand-700);font-weight:500;}
.drawer-cta{margin-top:22px;}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  padding:48px 0 52px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(27,111,168,.10) 1px,transparent 1px);
  background-size:22px 22px;opacity:.6;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:18px;}
.crumbs a{color:var(--ink-500);}
.crumbs a:hover{color:var(--brand-600);}
.crumbs span.sep{color:#C3D6E3;}
.page-hero h1{
  font-size:clamp(28px,4.2vw,44px);line-height:1.25;margin-bottom:16px;
}
.hero-lead{font-size:17px;color:var(--ink-500);max-width:560px;margin-bottom:24px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.badge-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;background:var(--brand-100);color:var(--brand-700);
  font-size:12px;font-weight:500;line-height:1.6;
}
.badge-tag.accent{background:rgba(255,122,69,.12);color:var(--accent-600);}
.badge-tag.ok{background:rgba(31,169,127,.12);color:#14835F;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:20px;
  box-shadow:var(--sh-2);background:#EEF4F9;
}
.hero-float{
  position:absolute;left:18px;bottom:-18px;display:flex;align-items:center;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 16px;
  box-shadow:var(--sh-2);
}
.hero-float svg{color:var(--brand-600);flex:0 0 auto;}
.hero-float span{font-size:13px;color:var(--ink-700);line-height:1.5;}

/* ---------- section shell ---------- */
.section{padding:80px 0;}
.section-tight{padding:56px 0;}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head h2{font-size:clamp(22px,3vw,32px);margin-bottom:12px;}
.section-head p{color:var(--ink-500);margin:0;font-size:15px;}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:500;letter-spacing:.06em;
  color:var(--brand-600);background:var(--brand-100);border-radius:999px;padding:5px 12px;margin-bottom:14px;
}

/* ---------- split layout ---------- */
.split-grid{display:grid;grid-template-columns:264px minmax(0,1fr);gap:40px;align-items:start;}
.toc-aside{
  position:sticky;top:104px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px 16px;box-shadow:var(--sh-1);
}
.toc-title{font-size:13px;font-weight:600;color:var(--ink-900);padding:0 12px 12px;letter-spacing:.04em;}
.toc-link{
  display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--ink-700);
  border-left:3px solid transparent;transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.toc-link:hover{background:var(--bg);color:var(--brand-600);}
.toc-link.active{background:var(--brand-100);color:var(--brand-700);font-weight:500;border-left-color:var(--brand-600);}
.toc-note{
  margin-top:16px;padding:14px 12px 2px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-500);line-height:1.7;
}

.content-col{min-width:0;}
.block{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);margin-bottom:24px;scroll-margin-top:104px;
  transition:box-shadow .3s ease;
}
.block:hover{box-shadow:var(--sh-2);}
.block h2{font-size:22px;padding-left:14px;position:relative;margin-bottom:14px;}
.block h2::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:3px;background:var(--brand-600);
}
.block h3{font-size:18px;margin:22px 0 10px;}
.block p{color:var(--ink-700);}
.block p:last-child{margin-bottom:0;}
.block-img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);
  background:#EEF4F9;margin:18px 0 8px;
}
.img-cap{font-size:13px;color:var(--ink-500);margin-bottom:0;}

.check-list{list-style:none;padding:0;margin:0;}
.check-list li{
  position:relative;padding-left:30px;margin-bottom:12px;color:var(--ink-700);font-size:15px;
}
.check-list li::before{
  content:"";position:absolute;left:6px;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--brand-100);border:2px solid var(--brand-600);
}
.check-list li strong{color:var(--ink-900);font-weight:600;}

.mini-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:20px;}
.mini-card{
  background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:20px;
  transition:background-color .2s ease,transform .2s ease;
}
.mini-card:hover{background:var(--brand-100);transform:translateY(-2px);}
.mini-card .ic{
  width:38px;height:38px;border-radius:10px;background:#fff;color:var(--brand-600);
  display:grid;place-items:center;margin-bottom:12px;border:1px solid var(--line);
}
.mini-card h3{font-size:16px;margin:0 0 8px;}
.mini-card p{font-size:14px;color:var(--ink-500);margin:0;}

/* device rows */
.device-list{border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-top:18px;}
.device-row{
  display:grid;grid-template-columns:1.1fr 1fr 1.4fr;gap:16px;padding:16px 20px;
  border-bottom:1px solid var(--line);background:#fff;align-items:center;
  transition:background-color .18s ease;
}
.device-row:last-child{border-bottom:none;}
.device-row:hover{background:var(--bg);}
.device-row.head{background:var(--brand-100);font-size:13px;font-weight:600;color:var(--brand-700);}
.device-row .cell{font-size:14px;color:var(--ink-700);min-width:0;}
.device-row .cell strong{color:var(--ink-900);font-weight:600;display:block;font-size:15px;}
.device-row .cell span{color:var(--ink-500);font-size:13px;}
.state{display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;background:rgba(31,169,127,.12);color:#14835F;font-weight:500;}
.state.muted{background:var(--brand-100);color:var(--brand-700);}

/* steps */
.steps{list-style:none;padding:0;margin:20px 0 0;counter-reset:step;}
.steps li{
  position:relative;padding:0 0 22px 52px;margin:0;counter-increment:step;
}
.steps li::before{
  content:counter(step);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:10px;
  background:var(--brand-100);color:var(--brand-700);font-size:15px;font-weight:600;
  display:grid;place-items:center;
}
.steps li::after{
  content:"";position:absolute;left:16px;top:40px;bottom:6px;width:1px;background:var(--line);
}
.steps li:last-child{padding-bottom:0;}
.steps li:last-child::after{display:none;}
.steps li h3{font-size:16px;margin:4px 0 6px;}
.steps li p{font-size:14.5px;color:var(--ink-500);margin:0;}

/* metrics */
.metrics-band{background:var(--brand-100);border-radius:20px;padding:34px 32px;border:1px solid #D6E7F3;}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.metric strong{
  display:block;font-size:clamp(26px,3.4vw,34px);font-weight:700;color:var(--accent-500);line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.metric span{display:block;font-size:14px;color:var(--ink-700);margin-top:6px;}

/* faq */
.faq-list{max-width:900px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:14px;
  overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item:hover{box-shadow:var(--sh-1);}
.faq-item.open{border-color:#CFE2EF;box-shadow:var(--sh-1);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:none;text-align:left;cursor:pointer;
  padding:18px 22px 18px 24px;font-size:17px;font-weight:600;color:var(--ink-900);
  position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:transparent;transition:background-color .2s ease;
}
.faq-item.open .faq-q::before{background:var(--brand-600);}
.faq-icon{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--brand-600);transition:transform .22s ease,background-color .22s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--brand-100);border-color:var(--brand-100);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item.open .faq-a{max-height:420px;}
.faq-a-inner{padding:0 22px 20px 24px;font-size:15px;line-height:1.85;color:var(--ink-500);}
.faq-a-inner p:last-child{margin-bottom:0;}

/* cta band */
.cta-band{
  background:var(--ink-900);color:#fff;border-radius:20px;padding:44px 40px;
  display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center;
}
.cta-band h2{color:#fff;font-size:clamp(22px,3vw,30px);margin-bottom:12px;}
.cta-band p{color:#A9C0CF;margin:0;font-size:15px;max-width:520px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end;}
.cta-band .btn-outline{background:transparent;border-color:#4E6E85;color:#fff;}
.cta-band .btn-outline:hover{background:rgba(255,255,255,.08);border-color:#8FAFC4;color:#fff;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:#A9C0CF;padding:62px 0 0;margin-top:80px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);color:#7FC0E4;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text em{color:#7E99AC;}
.footer-brand p{font-size:14px;color:#A9C0CF;margin-bottom:12px;line-height:1.8;}
.footer-social{display:flex;gap:12px;margin-top:18px;}
.footer-social a{
  width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.12);
  display:grid;place-items:center;color:#A9C0CF;transition:color .16s ease,border-color .16s ease,background-color .16s ease;
}
.footer-social a:hover{color:#fff;border-color:rgba(255,255,255,.32);background:rgba(255,255,255,.06);}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{color:#A9C0CF;font-size:14px;transition:color .16s ease;}
.footer-col a:hover{color:#fff;}
.footer-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);
  border-radius:14px;padding:20px;
}
.footer-card h4{color:#fff;font-size:15px;margin-bottom:10px;}
.footer-card p{font-size:13.5px;color:#A9C0CF;margin-bottom:14px;}
.footer-form{display:flex;gap:8px;flex-wrap:wrap;}
.footer-form input{
  flex:1 1 150px;height:44px;border-radius:10px;border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);color:#fff;padding:0 14px;font-size:14px;
}
.footer-form input::placeholder{color:#7E99AC;}
.footer-form input:focus{outline:none;border-color:#4E9BCB;box-shadow:0 0 0 3px rgba(27,111,168,.28);}
.footer-form button{
  height:44px;padding:0 18px;border-radius:10px;border:none;background:var(--accent-500);color:#fff;
  font-size:14px;font-weight:500;cursor:pointer;transition:background-color .16s ease,transform .16s ease;
}
.footer-form button:hover{background:var(--accent-600);transform:translateY(-1px);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);margin-top:48px;padding:20px 0;
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
  font-size:13px;color:#7E99AC;
}
.footer-bottom a{color:#7E99AC;}
.footer-bottom a:hover{color:#fff;}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:18px;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .split-grid{grid-template-columns:236px minmax(0,1fr);gap:30px;}
}
@media (max-width:991px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-actions .btn-accent{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .page-hero{padding:38px 0 44px;}
  .split-grid{grid-template-columns:1fr;}
  .toc-aside{position:static;top:auto;}
  .toc-link{display:inline-block;margin:0 6px 8px 0;border-left:none;border:1px solid var(--line);border-radius:999px;font-size:13px;padding:7px 14px;}
  .toc-link.active{border-color:var(--brand-600);border-left-color:var(--brand-600);}
  .toc-title{display:block;}
  .toc-aside .toc-nav{display:flex;flex-wrap:wrap;gap:0 6px;}
  .toc-note{border-top:none;padding-top:0;margin-top:6px;}
  .metrics-grid{grid-template-columns:repeat(2,1fr);gap:26px;}
  .cta-band{grid-template-columns:1fr;padding:36px 28px;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
}
@media (max-width:767px){
  .mini-cards{grid-template-columns:1fr;}
  .device-row{grid-template-columns:1fr;gap:6px;padding:16px 18px;}
  .device-row.head{display:none;}
  .block{padding:22px 20px;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{justify-content:center;text-align:center;}
}
@media (max-width:575px){
  .wrap{padding:0 20px;}
  .header-inner{height:68px;}
  .brand-text em{display:none;}
  .page-hero h1{font-size:28px;}
  .section{padding:40px 0;}
  .section-tight{padding:36px 0;}
  .metrics-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-float{position:static;margin-top:14px;}
  .faq-q{font-size:16px;padding:16px 18px 16px 20px;}
  .faq-a-inner{padding:0 18px 18px 20px;}
  .block h2{font-size:20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --brand-600:#1B6FA8;
  --brand-700:#14567F;
  --brand-100:#E7F1F8;
  --accent-500:#FF7A45;
  --accent-600:#F2662F;
  --ink-900:#0F2436;
  --ink-700:#2C4658;
  --ink-500:#5A7286;
  --line:#E2ECF3;
  --bg:#F6FAFD;
  --surface:#FFFFFF;
  --ok:#1FA97F;

  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-hero:20px;

  --sh-1:0 6px 24px rgba(15,36,54,.06);
  --sh-2:0 12px 32px rgba(15,36,54,.10);
  --sh-nav:0 2px 12px rgba(15,36,54,.06);

  --t-fast:.18s ease;
  --t-base:.28s ease;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color var(--t-fast);}
a:hover{color:var(--brand-700);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0 0 12px;color:var(--ink-900);font-weight:600;line-height:1.35;}
h1{font-size:clamp(28px,4.2vw,44px);font-weight:700;line-height:1.25;}
h2{font-size:clamp(22px,3vw,32px);}
h3{font-size:20px;}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(27,111,168,.28);outline-offset:2px;border-radius:6px;}

/* ============ 容器 ============ */
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (max-width:1399px){.wrap{max-width:1140px;}}
@media (max-width:1199px){.wrap{max-width:960px;}}
@media (max-width:991px){.wrap{max-width:100%;}}
@media (max-width:575px){.wrap{padding:0 20px;}}

/* ============ 头部 / 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t-fast);
}
.site-header.is-scrolled{box-shadow:var(--sh-nav);}
.header-inner{display:flex;align-items:center;gap:20px;height:78px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;color:var(--ink-900);}
.brand:hover{color:var(--ink-900);}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-600);
  border:1px solid #D3E5F2;
}
.brand-text{display:flex;flex-direction:column;line-height:1.18;}
.brand-text strong{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:.2px;}
.brand-text em{font-style:normal;font-size:12px;color:var(--ink-500);letter-spacing:1px;}

.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.main-nav .nav-link{
  position:relative;
  padding:10px 12px;
  font-size:15px;
  font-weight:400;
  color:var(--ink-700);
  border-radius:8px;
  line-height:1.4;
}
.main-nav .nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand-600);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--t-fast);
}
.main-nav .nav-link:hover{color:var(--brand-600);}
.main-nav .nav-link:hover::after{transform:scaleX(1);}
.main-nav .nav-link.active{color:var(--brand-600);font-weight:500;}
.main-nav .nav-link.active::after{transform:scaleX(1);}

.header-actions{display:flex;align-items:center;gap:12px;flex:none;}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink-900);
  transition:background var(--t-fast),border-color var(--t-fast);
}
.nav-toggle:hover{background:var(--brand-100);border-color:#CFE3F1;}

@media (max-width:991px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-actions .btn-cta{display:none;}
  .header-inner{height:68px;}
}

/* 移动端抽屉 */
.mobile-nav{width:340px !important;max-width:88vw;background:#fff;border-left:1px solid var(--line);}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--line);padding:16px 20px;align-items:center;}
.mobile-nav .offcanvas-body{padding:8px 20px 20px;}
.mobile-links a{
  display:flex;align-items:center;min-height:48px;
  font-size:16px;color:var(--ink-700);
  border-bottom:1px solid var(--line);
  transition:color var(--t-fast);
}
.mobile-links a:hover{color:var(--brand-600);}
.mobile-links a.active{color:var(--brand-600);font-weight:500;}
.mobile-cta{padding:16px 20px 24px;border-top:1px solid var(--line);}
.mobile-cta .btn{width:100%;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;line-height:1;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),box-shadow var(--t-fast),transform var(--t-fast);
}
.btn-primary{background:var(--accent-500);border-color:var(--accent-500);color:#fff;}
.btn-primary:hover{background:var(--accent-600);border-color:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(255,122,69,.28);}
.btn-primary:active{transform:none;box-shadow:none;}
.btn-outline{background:#fff;color:var(--brand-600);border-color:#BBD8EA;}
.btn-outline:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-600);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.btn-ghost{
  display:inline-flex;align-items:center;gap:6px;
  background:transparent;border:none;padding:0;height:auto;
  color:var(--brand-600);font-size:15px;font-weight:500;cursor:pointer;
}
.btn-ghost:hover{color:var(--brand-700);}
.btn-ghost .arrow{transition:transform var(--t-fast);}
.btn-ghost:hover .arrow{transform:translateX(4px);}

/* ============ 徽章 / 标签 ============ */
.tag{
  display:inline-flex;align-items:center;
  padding:3px 11px;border-radius:999px;
  font-size:12px;font-weight:500;line-height:1.7;
  background:var(--brand-100);color:var(--brand-600);
}
.tag-line{background:#F2F7FB;color:var(--ink-500);border:1px solid var(--line);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:500;letter-spacing:.8px;
  color:var(--brand-600);margin-bottom:12px;
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--accent-500);}

/* ============ 面包屑 ============ */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-500);margin-bottom:18px;}
.crumb a{color:var(--ink-500);}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{color:#B9CBD8;}
.crumb .current{color:var(--ink-700);font-weight:500;}

/* ============ 板块 ============ */
.section{padding:80px 0;}
.section-tight{padding:44px 0;}
.section-white{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:740px;margin-bottom:40px;}
.section-head p{color:var(--ink-500);font-size:16px;margin-bottom:0;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px;}
.section-head-row .section-head{margin-bottom:0;}

@media (max-width:991px){
  .section{padding:56px 0;}
  .section-tight{padding:36px 0;}
  .section-head{margin-bottom:32px;}
}
@media (max-width:575px){
  .section{padding:40px 0;}
  .section-tight{padding:28px 0;}
}

/* ============ 首屏 ============ */
.page-hero{position:relative;background:var(--surface);overflow:hidden;}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(27,111,168,.16) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.5;pointer-events:none;
  -webkit-mask-image:linear-gradient(to right,#000,transparent 72%);
  mask-image:linear-gradient(to right,#000,transparent 72%);
}
.hero-grid{
  position:relative;
  display:grid;grid-template-columns:6fr 5fr;
  gap:56px;align-items:center;
  padding:56px 0 68px;
}
.hero-copy h1{margin-bottom:16px;}
.hero-lead{font-size:17px;color:var(--ink-500);margin-bottom:28px;max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px;}
.hero-points{display:grid;gap:14px;}
.hero-points li{display:flex;gap:12px;align-items:flex-start;}
.point-icon{
  width:30px;height:30px;flex:none;border-radius:9px;
  display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-600);
}
.hero-points strong{display:block;font-size:15px;font-weight:600;color:var(--ink-900);line-height:1.5;}
.hero-points span{font-size:14px;color:var(--ink-500);line-height:1.7;}

.hero-media{position:relative;}
.hero-media-frame{
  position:relative;border-radius:var(--radius-hero);overflow:hidden;
  aspect-ratio:16/10;background:#EEF4F9;box-shadow:var(--sh-1);
}
.hero-media-frame img{width:100%;height:100%;object-fit:cover;}
.hero-float{
  position:absolute;left:-16px;bottom:-18px;
  display:flex;align-items:center;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:12px 18px;box-shadow:var(--sh-2);
  font-size:14px;color:var(--ink-700);font-weight:500;
}
.hero-float .dot{width:8px;height:8px;border-radius:50%;background:var(--ok);flex:none;}

@media (max-width:991px){
  .hero-grid{grid-template-columns:1fr;gap:36px;padding:36px 0 48px;}
  .hero-lead{max-width:100%;}
  .page-hero::before{display:none;}
  .hero-float{left:12px;bottom:12px;}
}
@media (max-width:575px){
  .hero-actions .btn{width:100%;}
  .hero-float{font-size:13px;padding:10px 14px;}
}

/* ============ 数据条 ============ */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--sh-1);
  padding:6px;
}
.stat-item{padding:22px 22px;border-right:1px solid var(--line);}
.stat-item:last-child{border-right:none;}
.stat-num{
  font-size:28px;font-weight:700;color:var(--ink-900);line-height:1.25;
  font-variant-numeric:tabular-nums;letter-spacing:.5px;
}
.stat-num em{font-style:normal;font-size:14px;font-weight:500;color:var(--accent-500);margin-left:4px;}
.stat-label{font-size:14px;color:var(--ink-500);margin-top:2px;}

@media (max-width:991px){
  .stat-band{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2){border-right:none;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);}
}
@media (max-width:575px){
  .stat-band{grid-template-columns:1fr;}
  .stat-item{border-right:none;border-bottom:1px solid var(--line);padding:18px 18px;}
  .stat-item:last-child{border-bottom:none;}
}

/* ============ 步骤列表 ============ */
.step-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.step-item{
  display:grid;grid-template-columns:88px 1fr;gap:22px;
  padding:26px 28px;
  border-bottom:1px solid var(--line);
  transition:background var(--t-fast);
}
.step-item:last-child{border-bottom:none;}
.step-item:hover{background:#F8FBFE;}
.step-index{
  width:48px;height:48px;border-radius:14px;
  display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-700);
  font-size:16px;font-weight:700;font-variant-numeric:tabular-nums;
}
.step-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:8px;}
.step-head h3{font-size:19px;margin:0;}
.step-body p{margin-bottom:0;color:var(--ink-500);font-size:15px;}
.step-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.step-points li{
  font-size:13px;color:var(--ink-500);
  background:var(--bg);border:1px solid var(--line);
  border-radius:999px;padding:3px 12px;
}

@media (max-width:767px){
  .step-item{grid-template-columns:1fr;gap:12px;padding:22px 20px;}
  .step-index{width:42px;height:42px;border-radius:12px;font-size:15px;}
  .step-head h3{font-size:17px;}
}

/* ============ 功能矩阵 ============ */
.matrix-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.matrix-tile{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 22px;
  box-shadow:var(--sh-1);
  transition:box-shadow var(--t-base),transform var(--t-base),border-color var(--t-base);
}
.matrix-tile:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#CFE3F1;}
.tile-icon{
  width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;margin-bottom:16px;
  background:var(--brand-100);color:var(--brand-600);
}
.matrix-tile h3{font-size:17px;margin-bottom:8px;}
.matrix-tile p{font-size:14px;color:var(--ink-500);margin-bottom:14px;}

@media (max-width:1199px){.matrix-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:575px){.matrix-grid{grid-template-columns:1fr;}}

/* ============ 场景卡片 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.scene-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:box-shadow var(--t-base),transform var(--t-base);
  display:flex;flex-direction:column;
}
.scene-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);}
.scene-media{overflow:hidden;background:#EEF4F9;}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease;}
.scene-card:hover .scene-media img{transform:scale(1.03);}
.scene-body{padding:24px 26px 26px;}
.scene-body h3{font-size:19px;margin-bottom:10px;}
.scene-body p{font-size:15px;color:var(--ink-500);margin-bottom:14px;}
.scene-wide{grid-column:1 / -1;flex-direction:row;}
.scene-wide .scene-media{flex:0 0 46%;aspect-ratio:16/10;}
.scene-wide .scene-body{flex:1;display:flex;flex-direction:column;justify-content:center;padding:32px 36px;}
.scene-wide .scene-body h3{font-size:22px;}
.scene-card:not(.scene-wide) .scene-media{aspect-ratio:16/9;}

@media (max-width:991px){
  .scene-wide .scene-body{padding:26px 28px;}
}
@media (max-width:767px){
  .scene-grid{grid-template-columns:1fr;}
  .scene-wide{flex-direction:column;}
  .scene-wide .scene-media{flex:none;aspect-ratio:16/10;}
  .scene-wide .scene-body{padding:24px 22px;}
}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px;max-width:940px;}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  transition:box-shadow var(--t-base),border-color var(--t-base);
}
.faq-item:hover{box-shadow:var(--sh-1);}
.faq-q{margin:0;}
.faq-btn{
  position:relative;width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px 18px 26px;
  background:transparent;border:none;text-align:left;
  font-size:17px;font-weight:500;color:var(--ink-900);
  cursor:pointer;line-height:1.6;
}
.faq-btn::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  background:var(--brand-600);border-radius:0 3px 3px 0;
  transform:scaleY(0);transform-origin:center;
  transition:transform var(--t-fast);
}
.faq-btn:not(.collapsed)::before{transform:scaleY(1);}
.faq-btn:not(.collapsed){color:var(--brand-700);}
.faq-icon{flex:none;color:var(--ink-500);transition:transform var(--t-fast),color var(--t-fast);}
.faq-btn:not(.collapsed) .faq-icon{transform:rotate(180deg);color:var(--brand-600);}
.faq-a{padding:0 26px 22px;font-size:15px;color:var(--ink-500);line-height:1.85;}

@media (max-width:575px){
  .faq-btn{font-size:16px;padding:16px 18px 16px 22px;}
  .faq-a{padding:0 22px 18px;}
}

/* ============ CTA ============ */
.cta-band{
  background:var(--ink-900);
  border-radius:var(--radius-hero);
  padding:48px 52px;
  display:grid;grid-template-columns:1.5fr auto;gap:36px;align-items:center;
}
.cta-band h2{color:#fff;margin-bottom:12px;}
.cta-band p{color:#A9C0CF;margin-bottom:0;font-size:15px;max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-actions .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.34);}
.cta-actions .btn-outline:hover{background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.6);}

@media (max-width:991px){
  .cta-band{grid-template-columns:1fr;padding:36px 32px;gap:24px;}
}
@media (max-width:575px){
  .cta-band{padding:30px 22px;border-radius:16px;}
  .cta-actions .btn{width:100%;}
}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:#A9C0CF;padding:64px 0 0;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:40px;
  padding-bottom:44px;
}
.site-footer .brand-text strong{color:#fff;}
.site-footer .brand-text em{color:#8FA9BA;}
.site-footer .brand-mark{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.14);color:#fff;}
.footer-brand p{font-size:14px;line-height:1.8;color:#8FA9BA;margin:16px 0 0;max-width:340px;}
.footer-social{display:flex;gap:10px;margin-top:20px;}
.footer-social a{
  width:36px;height:36px;border-radius:10px;
  display:grid;place-items:center;
  background:rgba(255,255,255,.06);color:#A9C0CF;
  border:1px solid rgba(255,255,255,.10);
  transition:background var(--t-fast),color var(--t-fast);
}
.footer-social a:hover{background:rgba(255,255,255,.14);color:#fff;}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{color:#A9C0CF;font-size:14px;transition:color .16s ease;}
.footer-col a:hover{color:#fff;}
.footer-sub p{font-size:14px;color:#8FA9BA;margin-bottom:14px;}
.footer-form{display:flex;gap:8px;flex-wrap:wrap;}
.footer-form input{
  flex:1 1 150px;min-width:0;height:42px;padding:0 14px;
  border-radius:var(--radius-btn);
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);
  color:#fff;font-size:14px;
  transition:border-color var(--t-fast),box-shadow var(--t-fast);
}
.footer-form input::placeholder{color:#7E97A8;}
.footer-form input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(27,111,168,.28);}
.footer-form button{
  height:42px;padding:0 18px;border:none;border-radius:var(--radius-btn);
  background:var(--accent-500);color:#fff;font-size:14px;font-weight:500;cursor:pointer;
  transition:background var(--t-fast);
}
.footer-form button:hover{background:var(--accent-600);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px 24px;
  justify-content:space-between;align-items:center;
  font-size:13px;color:#7E97A8;
}
.footer-bottom a{color:#7E97A8;}
.footer-bottom a:hover{color:#fff;}
.footer-bottom .foot-links{display:flex;flex-wrap:wrap;gap:16px;}

@media (max-width:991px){
  .site-footer{padding-top:48px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:575px){
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{justify-content:center;text-align:center;}
}

/* ============ 动效偏好 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
}

/* roulang page: category4 */
:root{
  --brand-600:#1B6FA8;
  --brand-700:#14567F;
  --brand-100:#E7F1F8;
  --accent-500:#FF7A45;
  --accent-600:#F0682F;
  --ink-900:#0F2436;
  --ink-700:#2C4658;
  --ink-500:#5A7286;
  --line:#E2ECF3;
  --bg:#F6FAFD;
  --surface:#FFFFFF;
  --ok:#1FA97F;
  --danger:#D64545;
  --r-card:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-hero:20px;
  --sh-1:0 6px 24px rgba(15,36,54,.06);
  --sh-2:0 12px 32px rgba(15,36,54,.10);
  --sh-nav:0 2px 12px rgba(15,36,54,.06);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease)}
img{max-width:100%;display:block;background:#EEF4F9}
button{font:inherit}
svg{flex:none}
::selection{background:rgba(27,111,168,.16)}
.num{font-variant-numeric:tabular-nums}

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

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1040;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-nav)}
.nav-wrap{
  height:78px;
  display:flex;
  align-items:center;
  gap:28px;
}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:var(--brand-100);
  color:var(--brand-600);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:.2px}
.brand-text em{font-size:12px;font-style:normal;color:var(--ink-500);letter-spacing:.6px}

.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:78px;
  padding:0 12px;
  font-size:15px;
  color:var(--ink-700);
}
.nav-link::after{
  content:"";
  position:absolute;left:12px;right:12px;bottom:20px;
  height:2px;border-radius:2px;background:var(--brand-600);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--brand-600)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--brand-700);font-weight:500}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.nav-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  background:#fff;
  color:var(--ink-700);
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand-600);color:var(--brand-600)}

.nav-drawer{
  display:none;
  position:fixed;inset:0;
  background:#fff;
  z-index:1200;
  padding:20px 20px 32px;
  overflow-y:auto;
}
.nav-drawer.open{display:flex;flex-direction:column}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;color:var(--ink-700);cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;margin:8px 0 24px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;font-size:16px;color:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.drawer-link[aria-current="page"]{color:var(--brand-700);font-weight:500}
.drawer-foot{margin-top:auto}
body.drawer-open{overflow:hidden}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:500;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:0 6px 18px rgba(255,122,69,.24)}
.btn-primary:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,122,69,.28)}
.btn-primary:active{transform:none;box-shadow:0 4px 12px rgba(255,122,69,.22)}
.btn-ghost{background:#fff;color:var(--brand-600);border-color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-700);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-light{background:#fff;color:var(--ink-900);border-color:rgba(255,255,255,.5)}
.btn-light:hover{background:var(--brand-100);color:var(--brand-700)}
.btn-sm{min-height:42px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
  outline:none;
  box-shadow:0 0 0 3px rgba(27,111,168,.28);
}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:500;color:var(--brand-600);white-space:nowrap;
}
.link-more svg{transition:transform .2s var(--ease)}
.link-more:hover{color:var(--brand-700)}
.link-more:hover svg{transform:translateX(4px)}

/* ---------- 徽章 / 标签 ---------- */
.badge-soft{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  border-radius:999px;
  background:var(--brand-100);
  color:var(--brand-700);
  font-size:12px;font-weight:500;line-height:1;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:13px;color:var(--ink-500);
}
.tag:hover{border-color:var(--brand-600);color:var(--brand-600)}

/* ---------- 通用板块 ---------- */
.section{padding:80px 0}
.section-alt{background:#fff}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:36px;
}
.section-head h2{
  font-size:clamp(22px,3vw,32px);
  font-weight:600;
  color:var(--ink-900);
  line-height:1.35;
}
.section-sub{margin-top:10px;font-size:15px;color:var(--ink-500)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:500;color:var(--brand-600);
  letter-spacing:.4px;margin-bottom:12px;
}
.eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--brand-600)}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-500);
  padding:24px 0 0;
}
.crumb a:hover{color:var(--brand-600)}
.crumb .sep{color:#B9CEDC}
.crumb .current{color:var(--ink-700);font-weight:500}

/* ---------- 分类首屏 ---------- */
.cat-hero{
  position:relative;
  background:var(--bg);
  padding-bottom:64px;
  overflow:hidden;
}
.cat-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(27,111,168,.10) 1px,transparent 1px);
  background-size:26px 26px;
  opacity:.55;
  pointer-events:none;
}
.cat-hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:6fr 6fr;
  gap:48px;
  align-items:center;
  padding-top:28px;
}
.cat-hero h1{
  font-size:clamp(28px,4.2vw,44px);
  font-weight:600;
  line-height:1.3;
  color:var(--ink-900);
  margin-bottom:16px;
}
.cat-hero-lead{
  font-size:16px;
  color:var(--ink-500);
  max-width:520px;
  margin-bottom:26px;
}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}
.hero-points{display:flex;flex-direction:column;gap:14px}
.hero-point{display:flex;gap:12px;align-items:flex-start}
.hero-point .ico{
  width:32px;height:32px;flex:none;
  display:flex;align-items:center;justify-content:center;
  border-radius:10px;background:#fff;border:1px solid var(--line);
  color:var(--brand-600);
}
.hero-point strong{display:block;font-size:15px;font-weight:600;color:var(--ink-900);line-height:1.6}
.hero-point span{font-size:13.5px;color:var(--ink-500);line-height:1.7}

.cat-hero-media{position:relative}
.cat-hero-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-hero);
  box-shadow:var(--sh-2);
}
.hero-float{
  position:absolute;left:-18px;bottom:24px;
  display:flex;align-items:center;gap:12px;
  padding:14px 18px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:var(--sh-1);
  max-width:300px;
}
.hero-float .dot{
  width:34px;height:34px;flex:none;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-600);
}
.hero-float p{font-size:13.5px;color:var(--ink-700);line-height:1.6;margin:0}

/* ---------- 通栏宽卡 ---------- */
.wide-card{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:0;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.wide-card-media{position:relative;min-height:320px}
.wide-card-media img{width:100%;height:100%;object-fit:cover}
.wide-card-body{padding:40px 44px;display:flex;flex-direction:column;justify-content:center}
.wide-card-body h2{font-size:clamp(22px,3vw,30px);font-weight:600;color:var(--ink-900);line-height:1.4;margin-bottom:14px}
.wide-card-body p{font-size:15px;color:var(--ink-500);margin-bottom:22px}
.check-list{display:flex;flex-direction:column;gap:14px;margin-bottom:26px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink-700)}
.check-list .tick{
  width:22px;height:22px;flex:none;margin-top:3px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-600);
}
.check-list strong{font-weight:600;color:var(--ink-900)}
.check-list em{font-style:normal;color:var(--ink-500);font-size:13.5px;display:block}

/* ---------- 三张等高卡 ---------- */
.grid-eq{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  align-items:stretch;
}
.eq-card{
  display:flex;flex-direction:column;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow .32s var(--ease),transform .32s var(--ease);
}
.eq-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.eq-card figure{overflow:hidden;margin:0}
.eq-card figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  transition:transform .32s var(--ease);
}
.eq-card:hover figure img{transform:scale(1.03)}
.eq-card-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1}
.eq-card-body h3{font-size:19px;font-weight:600;color:var(--ink-900);line-height:1.5;margin-bottom:10px}
.eq-card-body p{font-size:14.5px;color:var(--ink-500);flex:1}
.eq-card-foot{margin-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.eq-meta{font-size:13px;color:var(--ink-500)}

.eq-card.dark{background:var(--ink-900);border-color:var(--ink-900)}
.eq-card.dark .eq-card-body h3{color:#fff}
.eq-card.dark .eq-card-body p{color:#A9C0CF}
.eq-card.dark .eq-card-foot .link-more{color:#FFB694}
.eq-card.dark .eq-card-foot .link-more:hover{color:#fff}
.eq-card.dark .badge-soft{background:rgba(255,255,255,.12);color:#CFE3F0}

/* ---------- 数据条带 ---------- */
.strip{
  background:var(--brand-100);
  border-radius:var(--r-card);
  padding:36px 40px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.strip-item{border-left:1px solid rgba(27,111,168,.18);padding-left:20px}
.strip-item:first-child{border-left:0;padding-left:0}
.strip-item .v{
  font-size:clamp(26px,3.4vw,36px);
  font-weight:600;color:var(--accent-500);
  line-height:1.2;font-variant-numeric:tabular-nums;
}
.strip-item .k{margin-top:6px;font-size:14px;color:var(--ink-700)}
.strip-item .d{margin-top:4px;font-size:13px;color:var(--ink-500)}

/* ---------- FAQ ---------- */
.faq{max-width:900px;margin:0 auto}
.faq .accordion-item{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:#fff;
  margin-bottom:14px;
  overflow:hidden;
}
.faq .accordion-button{
  position:relative;
  width:100%;
  padding:20px 60px 20px 26px;
  font-size:17px;font-weight:600;color:var(--ink-900);
  background:#fff;
  border:0;
  border-radius:0;
  box-shadow:none;
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.faq .accordion-button::before{
  content:"";
  position:absolute;left:0;top:14px;bottom:14px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand-600);
  opacity:0;transition:opacity .2s var(--ease);
}
.faq .accordion-button:not(.collapsed){color:var(--brand-700);background:#fff;box-shadow:none}
.faq .accordion-button:not(.collapsed)::before{opacity:1}
.faq .accordion-button::after{
  position:absolute;right:24px;top:50%;
  width:18px;height:18px;margin:0;
  transform:translateY(-50%);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B6FA8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-size:18px 18px;
  transition:transform .28s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(180deg)}
.faq .accordion-button:focus{box-shadow:0 0 0 3px rgba(27,111,168,.28);z-index:2}
.faq .accordion-body{
  padding:0 26px 24px 26px;
  font-size:15px;line-height:1.85;color:var(--ink-700);
}
.faq .accordion-body ul{display:flex;flex-direction:column;gap:8px;margin-top:10px}
.faq .accordion-body li{position:relative;padding-left:16px;color:var(--ink-500);font-size:14.5px}
.faq .accordion-body li::before{
  content:"";position:absolute;left:0;top:11px;
  width:6px;height:6px;border-radius:50%;background:var(--brand-600);opacity:.6;
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--ink-900);
  border-radius:var(--r-hero);
  padding:48px 52px;
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:32px;
  align-items:center;
}
.cta-band h2{font-size:clamp(22px,3vw,30px);font-weight:600;color:#fff;line-height:1.4;margin-bottom:12px}
.cta-band p{font-size:15px;color:#A9C0CF;max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:#A9C0CF;margin-top:80px}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-top:64px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:18px}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text em{color:#8FA9BB}
.footer-brand p{font-size:14px;line-height:1.8;color:#A9C0CF;margin-bottom:10px}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{
  width:38px;height:38px;
  display:flex;align-items:center;justify-content:center;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.14);
  color:#A9C0CF;
  transition:color .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease);
}
.footer-social a:hover{color:#fff;background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.28)}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:#A9C0CF;transition:color .16s var(--ease)}
.footer-col a:hover{color:#fff}
.footer-card{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);
  border-radius:14px;
  padding:20px;
}
.footer-card p{font-size:13.5px;color:#A9C0CF;margin-bottom:14px}
.footer-form{display:flex;flex-direction:column;gap:10px}
.footer-form label{font-size:13px;color:#CFE3F0}
.footer-form input{
  height:46px;padding:0 14px;
  border-radius:var(--r-input);
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);
  color:#fff;font-size:14px;
}
.footer-form input::placeholder{color:#7E97A8}
.footer-form input:focus{outline:none;border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(255,122,69,.20)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.10)}
.footer-bottom-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;flex-wrap:wrap;
}
.footer-bottom p,.footer-bottom a{font-size:13px;color:#8FA9BB}
.footer-bottom ul{display:flex;gap:20px;flex-wrap:wrap}
.footer-bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .wrap{max-width:1140px}
}
@media (max-width:991px){
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .nav-wrap{height:70px;gap:16px}
  .nav-actions .btn{display:none}
  .section{padding:56px 0}
  .cat-hero-grid{grid-template-columns:1fr;gap:32px;padding-top:20px}
  .cat-hero{padding-bottom:48px}
  .cat-hero::before{display:none}
  .wide-card{grid-template-columns:1fr}
  .wide-card-media{min-height:220px}
  .wide-card-body{padding:30px 26px}
  .grid-eq{grid-template-columns:1fr 1fr}
  .grid-eq .eq-card:nth-child(3){grid-column:span 2}
  .strip{grid-template-columns:repeat(2,1fr);gap:22px;padding:30px 26px}
  .strip-item:nth-child(3){border-left:0;padding-left:0}
  .cta-band{grid-template-columns:1fr;padding:36px 28px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding-top:48px}
  .hero-float{left:16px;bottom:16px}
}
@media (max-width:767px){
  .section{padding:44px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:26px}
  .grid-eq{grid-template-columns:1fr}
  .grid-eq .eq-card:nth-child(3){grid-column:span 1}
  .cat-hero h1{font-size:28px}
  .btn{width:100%}
  .cat-hero-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom-inner{flex-direction:column;text-align:center}
  .footer-bottom ul{justify-content:center}
}
@media (max-width:575px){
  .wrap{padding:0 20px}
  .strip{grid-template-columns:1fr}
  .strip-item{border-left:0;padding-left:0;padding-top:16px;border-top:1px solid rgba(27,111,168,.18)}
  .strip-item:first-child{padding-top:0;border-top:0}
  .hero-float{position:static;margin-top:14px;max-width:none}
  .faq .accordion-button{font-size:16px;padding:18px 52px 18px 22px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
}