/* roulang page: index */
:root{
  --nav-width:240px;
  --color-primary:#0B2B4F;
  --color-accent:#1E6FD9;
  --color-accent-dark:#155CB8;
  --color-highlight:#FF7F50;
  --color-bg:#F5F8FC;
  --color-surface:#FFFFFF;
  --color-text:#2E3A45;
  --color-text-secondary:#6B7A88;
  --color-text-muted:#9AA6B2;
  --color-border:#E3E9F0;
  --radius-md:8px;
  --radius-lg:16px;
  --shadow-sm:0 2px 8px rgba(11,43,79,.06);
  --shadow-md:0 8px 24px rgba(11,43,79,.09);
  --shadow-lg:0 16px 40px rgba(11,43,79,.12);
  --space-section:clamp(4rem,8vw,7rem) 0;
  --container:1200px;
  --font-sans:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,
*::before,
*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);line-height:1.7;font-size:16px}
img{max-width:100%;display:block}
a{color:var(--color-accent);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--color-accent-dark)}
button{font-family:inherit;cursor:pointer}
a:focus-visible,
button:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
@media(max-width:640px){.container{padding:0 16px}}
.app-shell{min-height:100vh}
.main-content{margin-left:var(--nav-width)}

/* 左侧导航 */
.side-nav{position:fixed;top:0;left:0;width:var(--nav-width);height:100vh;background:var(--color-surface);border-right:1px solid var(--color-border);padding:24px 16px;display:flex;flex-direction:column;z-index:115;overflow-y:auto}
.nav-logo{display:flex;align-items:center;gap:10px;margin-bottom:28px;padding:4px}
.logo-mark{width:42px;height:42px;background:var(--color-primary);color:#fff;border-radius:10px;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:18px;letter-spacing:1px;flex:0 0 42px}
.logo-text{font-size:16px;font-weight:700;color:var(--color-primary);line-height:1.2}
.logo-text small{display:block;font-size:12px;font-weight:400;color:var(--color-text-secondary);letter-spacing:.5px}
.nav-group{font-size:12px;color:var(--color-text-muted);letter-spacing:.08em;margin:24px 0 8px;padding:0 12px}
.nav-main{list-style:none;margin:0;padding:0}
.nav-main li{margin-bottom:4px}
.nav-main a{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius-md);color:var(--color-text);font-size:14px;font-weight:500;border-left:3px solid transparent;transition:background .2s,color .2s}
.nav-main a::before{content:"";width:6px;height:6px;border-radius:2px;background:currentColor;opacity:.45;flex:0 0 6px}
.nav-main a:hover{background:rgba(30,111,217,.06);color:var(--color-accent)}
.nav-main a.active{background:rgba(30,111,217,.08);color:var(--color-accent);border-left-color:var(--color-accent);font-weight:600}
.side-nav-foot{margin-top:auto;padding-top:24px;border-top:1px solid var(--color-border);font-size:13px;color:var(--color-text-secondary);line-height:1.7}
.side-nav-foot p{margin:0 0 4px}
.nav-backdrop{display:none;position:fixed;inset:0;background:rgba(11,43,79,.45);z-index:110}
.mobile-topbar{display:none;position:fixed;top:0;left:0;right:0;height:56px;background:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:120;align-items:center;padding:0 16px;gap:12px}
.menu-toggle{background:none;border:0;width:36px;height:36px;border-radius:var(--radius-md);display:flex;flex-direction:column;justify-content:center;gap:5px;padding:6px}
.menu-toggle span{display:block;height:2px;background:var(--color-primary);border-radius:2px}
.mobile-logo{font-weight:800;color:var(--color-primary);font-size:16px}
@media(max-width:1024px){
  .side-nav{transform:translateX(-100%);transition:transform .3s ease;width:264px;box-shadow:var(--shadow-lg);top:56px;height:calc(100vh - 56px)}
  .side-nav.open{transform:translateX(0)}
  .nav-backdrop.show{display:block}
  .main-content{margin-left:0}
  .mobile-topbar{display:flex}
}

/* Hero */
.hero{position:relative;background:var(--color-primary);color:#fff;padding:clamp(64px,9vw,120px) 0;background-image:linear-gradient(120deg,rgba(11,43,79,.92) 0%,rgba(11,43,79,.68) 55%,rgba(11,43,79,.42) 100%),url(/assets/images/backpic/back-1.png);background-size:cover;background-position:center}
.hero-inner{max-width:var(--container);padding:0 24px;margin:0 auto}
.hero h1{font-size:clamp(2rem,4.5vw,3rem);font-weight:800;line-height:1.25;letter-spacing:-.01em;max-width:760px;color:#fff;margin:0 0 16px}
.hero-sub{font-size:clamp(1.05rem,1.8vw,1.25rem);color:rgba(255,255,255,.92);max-width:680px;line-height:1.7;margin:0 0 28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:32px}
.hero-smalls{display:flex;gap:30px;flex-wrap:wrap;opacity:.88}
.hero-smalls span{font-size:14px;color:rgba(255,255,255,.88);display:inline-flex;align-items:center}
.hero-smalls span::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--color-highlight);margin-right:8px}

/* 按钮 */
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--radius-md);font-size:15px;font-weight:600;border:1px solid transparent;background:var(--color-accent);color:#fff;transition:background .2s,box-shadow .2s,transform .1s}
.button:hover{background:var(--color-accent-dark);color:#fff;box-shadow:var(--shadow-md)}
.button:active{transform:translateY(1px)}
.button.large{height:52px;padding:0 30px;font-size:16px}
.button-outline{background:transparent;border-color:var(--color-accent);color:var(--color-accent)}
.button-outline:hover{background:rgba(30,111,217,.08);color:var(--color-accent-dark);box-shadow:none}
.button-ghost{background:transparent;border-color:var(--color-border);color:var(--color-text)}
.button-ghost:hover{border-color:var(--color-text-muted);color:var(--color-primary);background:rgba(30,111,217,.03)}
.button-white{background:#fff;color:var(--color-primary)}
.button-white:hover{background:#eef4fb;color:var(--color-primary)}
.hero .button-transparent{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.6);color:#fff}
.hero .button-transparent:hover{background:rgba(255,255,255,.18);border-color:#fff;color:#fff}

/* 板块通用 */
.section{padding:var(--space-section)}
.section-soft{background:#EDF3FA}
.section-head{max-width:780px;margin-bottom:48px}
.section-tag{display:inline-block;font-size:13px;font-weight:600;color:var(--color-accent);background:rgba(30,111,217,.08);padding:4px 12px;border-radius:999px;margin-bottom:12px}
.section-title{font-size:clamp(1.5rem,3vw,2rem);font-weight:700;color:var(--color-primary);margin:0 0 12px;line-height:1.3}
.section-desc{font-size:16px;color:var(--color-text-secondary);line-height:1.75;margin:0}
.section-head.light .section-title{color:#fff}
.section-head.light .section-desc{color:rgba(255,255,255,.75)}
.section-tag.inverse{background:rgba(255,255,255,.12);color:#fff}

/* 核心卖点 */
.feature-stack .cell{margin-bottom:32px;display:flex}
.feature-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);display:flex;align-items:stretch;width:100%;transition:transform .25s ease,box-shadow .25s ease}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.feature-card.reverse{flex-direction:row-reverse}
.feature-media{width:50%;object-fit:cover;min-height:280px}
.feature-body{padding:32px;width:50%;display:flex;flex-direction:column;justify-content:center}
.feature-tag{font-size:14px;font-weight:600;color:var(--color-accent)}
.feature-card h3{font-size:1.25rem;color:var(--color-primary);margin:8px 0 12px;line-height:1.4}
.feature-card p{color:var(--color-text-secondary);line-height:1.75;margin:0 0 16px}
.feature-meta{display:flex;gap:18px;list-style:none;padding:0;margin:12px 0 0;font-size:13px;color:var(--color-text-muted)}
.arrow-link{font-weight:600;color:var(--color-accent);display:inline-flex;align-items:center;gap:4px;margin-top:2px}
.arrow-link:hover{color:var(--color-accent-dark)}
@media(max-width:900px){
  .feature-card,
  .feature-card.reverse{flex-direction:column}
  .feature-media{width:100%;min-height:220px}
  .feature-body{width:100%}
}

/* 演示区 */
.demo-visual{background:var(--color-primary);border-radius:var(--radius-lg);overflow:hidden;padding:clamp(28px,5vw,56px);display:flex;align-items:center;gap:40px;color:#fff;box-shadow:var(--shadow-lg)}
.demo-media{flex:1.2;min-width:0;border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,.18)}
.demo-media img{width:100%;height:100%;object-fit:cover;max-height:420px}
.demo-tags{flex:1;display:flex;flex-direction:column;gap:14px}
.demo-tag{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:10px;padding:16px 18px;display:flex;flex-direction:column;gap:4px;transition:background .2s}
.demo-tag:hover{background:rgba(255,255,255,.18)}
.demo-tag strong{color:#fff;font-size:15px}
.demo-tag span{color:rgba(255,255,255,.75);font-size:14px;line-height:1.6}
.steps .cell{display:flex;margin-bottom:20px}
.step-item{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-sm);width:100%}
.step-num{display:inline-flex;width:32px;height:32px;background:var(--color-accent);color:#fff;border-radius:8px;align-items:center;justify-content:center;font-weight:700;font-size:14px;margin-bottom:12px}
.step-item h4{margin:0 0 6px;font-size:1rem;color:var(--color-primary)}
.step-item p{margin:0;font-size:14px;color:var(--color-text-secondary)}
@media(max-width:900px){
  .demo-visual{flex-direction:column}
  .demo-media{width:100%}
  .demo-tags{width:100%}
}

/* 证据与用户反馈 */
.evidence{background:var(--color-primary);color:#fff;padding:var(--space-section)}
.metrics .cell{display:flex;margin-bottom:24px}
.metric-item{text-align:center;padding:26px 16px;border-radius:var(--radius-lg);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);width:100%}
.metric-num{font-size:2.4rem;font-weight:800;color:#fff;line-height:1.2}
.metric-label{font-size:14px;color:rgba(255,255,255,.78);margin-top:8px}
.testimonials .cell{display:flex;margin-bottom:24px}
.testimonial{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-lg);padding:28px;width:100%}
.testimonial .stars{color:#FFB400;letter-spacing:3px;font-size:14px;margin-bottom:10px}
.testimonial blockquote{margin:0 0 14px;color:rgba(255,255,255,.92);font-size:16px;line-height:1.75}
.testimonial cite{font-style:normal;font-size:14px;color:rgba(255,255,255,.7)}
@media(max-width:720px){
  .metrics .cell{width:50%}
  .testimonials .cell{width:100%}
}
@media(max-width:540px){
  .metrics .cell{width:100%}
}

/* 价格方案 */
.pricing-grid .cell{display:flex;margin-bottom:24px}
.pricing-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px;position:relative;display:flex;flex-direction:column;width:100%;box-shadow:var(--shadow-sm);transition:box-shadow .25s,transform .25s}
.pricing-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.pricing-card.recommended{border:2px solid var(--color-accent);box-shadow:var(--shadow-lg)}
.recommend-badge{position:absolute;top:-14px;right:24px;background:var(--color-highlight);color:#fff;font-size:13px;font-weight:700;padding:4px 14px;border-radius:999px}
.pricing-card h3{font-size:1.15rem;color:var(--color-primary);margin:0 0 6px}
.price-amount{font-size:2rem;font-weight:800;color:var(--color-primary);margin-top:6px}
.price-note{font-size:14px;color:var(--color-text-secondary);margin-top:2px}
.pricing-card ul{list-style:none;margin:24px 0;padding:0;display:flex;flex-direction:column;gap:10px}
.pricing-card li{position:relative;padding-left:28px;font-size:14px;color:var(--color-text)}
.pricing-card li::before{content:"✓";position:absolute;left:0;top:0;color:var(--color-accent);font-weight:700}
.pricing-card .button{margin-top:auto}
@media(max-width:900px){
  .pricing-grid .cell{width:50%}
}
@media(max-width:640px){
  .pricing-grid .cell{width:100%}
}

/* 最新动态 */
.updates-list .cell{display:flex;margin-bottom:24px}
.update-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;display:flex;box-shadow:var(--shadow-sm);width:100%;transition:box-shadow .25s,transform .25s}
.update-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.update-thumb{flex:0 0 128px;width:128px;min-height:120px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.9);font-weight:700}
.update-body{padding:20px 22px;flex:1;display:flex;flex-direction:column}
.update-cat{display:inline-block;font-size:12px;background:rgba(30,111,217,.08);color:var(--color-accent);padding:3px 10px;border-radius:999px;margin-bottom:8px;width:fit-content}
.update-body h3{font-size:16px;font-weight:600;margin:0 0 8px;line-height:1.5}
.update-body h3 a{color:var(--color-text)}
.update-body h3 a:hover{color:var(--color-accent)}
.update-body p{font-size:14px;color:var(--color-text-secondary);margin:0 0 12px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.update-meta{display:flex;justify-content:space-between;align-items:center;margin-top:auto;font-size:13px;color:var(--color-text-muted)}
.read-more{font-weight:600;color:var(--color-accent)}
.updates-empty{border:1px dashed var(--color-border);border-radius:var(--radius-lg);padding:48px;text-align:center;color:var(--color-text-secondary);background:var(--color-surface);font-size:15px}
@media(max-width:720px){
  .updates-list .cell{width:100%}
}
@media(max-width:540px){
  .update-card{flex-direction:column}
  .update-thumb{width:100%;flex:none;min-height:90px}
}

/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto}
.accordion{list-style:none;margin:0;padding:0}
.accordion-item{border:1px solid var(--color-border);border-radius:var(--radius-md);margin-bottom:12px;background:var(--color-surface);overflow:hidden;transition:border-color .2s,box-shadow .2s}
.accordion-item.is-active{border-color:var(--color-accent);box-shadow:var(--shadow-sm)}
.accordion-title{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;font-size:16px;font-weight:700;color:var(--color-primary);cursor:pointer;position:relative}
.accordion-title::after{content:"+";font-size:22px;line-height:1;color:var(--color-accent);transition:transform .2s}
.accordion-item.is-active .accordion-title::after{transform:rotate(45deg)}
.accordion-content{padding:0 20px 20px;color:var(--color-text-secondary);line-height:1.8;background:#F9FBFD;font-size:15px}
.accordion-content p{margin:0}

/* CTA */
.cta-band{background:linear-gradient(120deg,#EAF1FA,#F8FBFE);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:clamp(32px,6vw,64px);display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;box-shadow:var(--shadow-sm)}
.cta-copy h2{color:var(--color-primary);font-size:clamp(1.3rem,2.5vw,1.8rem);margin:0 0 8px}
.cta-copy p{color:var(--color-text-secondary);margin:0;max-width:480px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
@media(max-width:640px){
  .cta-band{flex-direction:column;align-items:flex-start}
  .cta-actions .button{width:100%}
}

/* 页脚 */
.site-footer{background:var(--color-primary);color:#B8C7DA;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:32px;max-width:var(--container);margin:0 auto;padding:0 24px 48px}
.footer-brand p{color:rgba(255,255,255,.65);font-size:14px;line-height:1.8;max-width:360px;margin-top:8px}
.footer-logo{color:#fff;margin-bottom:12px}
.footer-logo .logo-mark{background:#fff;color:var(--color-primary)}
.footer-logo .logo-text{color:#fff}
.footer-logo .logo-text small{color:rgba(255,255,255,.65)}
.footer-col h4{color:#fff;font-size:15px;margin:0 0 16px;font-weight:700}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-col a{color:#B8C7DA;font-size:14px}
.footer-col a:hover{color:#fff}
.footer-col li{color:#B8C7DA;font-size:14px;line-height:1.7}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 24px;text-align:center;font-size:13px;color:rgba(255,255,255,.55);display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
@media(max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:540px){
  .footer-grid{grid-template-columns:1fr;padding-bottom:32px}
}

/* 浮动 CTA */
.floating-cta{position:fixed;right:28px;bottom:28px;width:56px;height:56px;border-radius:50%;background:var(--color-highlight);color:#fff;box-shadow:var(--shadow-lg);z-index:150;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;border:0;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .25s,visibility .25s,transform .25s,background .2s}
.floating-cta.show{opacity:1;visibility:visible;transform:translateY(0)}
.floating-cta:hover{background:#f06737;transform:scale(1.04)}
.floating-cta .cta-tip{position:absolute;right:calc(100% + 12px);top:50%;transform:translateY(-50%);background:var(--color-primary);color:#fff;padding:6px 12px;border-radius:6px;font-size:13px;white-space:nowrap;opacity:0;transition:opacity .2s;pointer-events:none}
.floating-cta:hover .cta-tip{opacity:1}
@media(max-width:540px){
  .floating-cta{width:48px;height:48px;right:16px;bottom:16px}
  .floating-cta .cta-tip{display:none}
}

/* roulang page: category1 */
:root{
  --color-primary:#0B2B4F;
  --color-accent:#1E6FD9;
  --color-highlight:#FF7F50;
  --color-bg:#F5F8FC;
  --color-surface:#FFFFFF;
  --color-text:#2E3A45;
  --color-text-secondary:#6B7A88;
  --color-text-muted:#9AA6B2;
  --color-border:#E3E9F0;
  --radius-md:8px;
  --radius-lg:16px;
  --shadow-sm:0 2px 8px rgba(11,43,79,.06);
  --shadow-md:0 8px 24px rgba(11,43,79,.09);
  --shadow-lg:0 16px 40px rgba(11,43,79,.12);
  --space-section:clamp(4rem,8vw,7rem) 0;
  --container:1200px;
  --font-sans:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  color:var(--color-text);
  background:var(--color-bg);
  -webkit-font-smoothing:antialiased;
}
a{color:var(--color-accent);text-decoration:none;transition:color .2s ease;}
a:hover{color:#155CB8;}
img{max-width:100%;display:block;}
ul,ol{list-style:none;}
button{font-family:inherit;border:none;background:none;cursor:pointer;}
input,textarea{font-family:inherit;}
:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px;}

.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:var(--space-section);}
.section-head{margin-bottom:2.5rem;text-align:center;}
.section-tag{
  display:inline-block;font-size:13px;font-weight:600;
  color:var(--color-accent);background:rgba(30,111,217,.08);
  padding:6px 14px;border-radius:999px;margin-bottom:14px;letter-spacing:.04em;
}
.section-title{
  font-size:clamp(1.5rem,3vw,2rem);
  font-weight:700;color:var(--color-primary);
  line-height:1.3;letter-spacing:-.01em;margin-bottom:10px;
}
.section-desc{max-width:680px;margin:0 auto;color:var(--color-text-secondary);font-size:16px;}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;padding:14px 28px;
  border-radius:var(--radius-md);border:1px solid transparent;
  transition:background .25s ease,color .25s ease,border-color .25s ease,box-shadow .25s ease,transform .2s ease;
  text-decoration:none;white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--color-accent);color:#fff;}
.btn-primary:hover{background:#155CB8;color:#fff;box-shadow:var(--shadow-md);}
.btn-outline{border-color:var(--color-accent);color:var(--color-accent);background:transparent;}
.btn-outline:hover{background:rgba(30,111,217,.08);color:#155CB8;border-color:#155CB8;}
.btn-light{background:#fff;color:var(--color-primary);}
.btn-light:hover{background:#EAF1FB;color:var(--color-primary);box-shadow:var(--shadow-md);}
.btn-ghost{background:transparent;border-color:rgb(255,255,255,.6);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;}
.btn-block{display:flex;width:100%;}

/* App Shell Navigation */
.app-shell{position:relative;}
.side-nav{
  position:fixed;top:0;left:0;width:240px;height:100vh;
  background:var(--color-surface);border-right:1px solid var(--color-border);
  display:flex;flex-direction:column;z-index:120;
  transition:transform .3s ease,box-shadow .3s ease;
}
.nav-brand{padding:28px 20px 18px;border-bottom:1px solid var(--color-border);}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;}
.logo-mark{
  width:46px;height:46px;flex-shrink:0;border-radius:10px;
  background:var(--color-primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:800;letter-spacing:-.01em;
}
.logo-text{display:flex;flex-direction:column;line-height:1.25;color:var(--color-primary);font-weight:700;font-size:16px;}
.logo-text small{font-size:11px;font-weight:500;color:var(--color-text-muted);margin-top:3px;}

.side-nav__menu{flex:1;overflow-y:auto;padding:18px 12px;}
.nav-group{
  font-size:11px;font-weight:600;color:var(--color-text-muted);
  letter-spacing:.08em;padding:14px 10px 6px;
}
.nav-main{margin-bottom:14px;}
.nav-main a{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:6px;
  font-size:14px;font-weight:500;color:var(--color-text);
  text-decoration:none;position:relative;
  transition:background .2s ease,color .2s ease;
}
.nav-main a i{width:18px;text-align:center;color:var(--color-text-muted);font-size:15px;transition:color .2s ease;}
.nav-main a:hover{background:rgba(30,111,217,.06);color:var(--color-accent);}
.nav-main a:hover i{color:var(--color-accent);}
.nav-main a.active{
  background:rgba(30,111,217,.08);color:var(--color-accent);font-weight:600;
}
.nav-main a.active::before{
  content:"";position:absolute;left:-12px;top:8px;bottom:8px;width:4px;
  background:var(--color-accent);border-radius:0 4px 4px 0;
}
.nav-main a.active i{color:var(--color-accent);}
.nav-foot{padding:16px 20px;border-top:1px solid var(--color-border);}
.nav-foot a{
  display:flex;align-items:center;gap:8px;font-size:13px;
  color:var(--color-accent);font-weight:500;
}
.nav-foot a:hover{color:#155CB8;}
.nav-foot a i{font-size:14px;}

.main-wrap{margin-left:240px;}
.menu-toggle{
  display:none;position:fixed;top:14px;left:14px;z-index:110;
  width:44px;height:44px;border-radius:10px;
  background:var(--color-primary);color:#fff;align-items:center;justify-content:center;
  font-size:18px;box-shadow:var(--shadow-md);
}
.nav-overlay{
  position:fixed;inset:0;background:rgba(11,43,79,.45);z-index:105;
  opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
}

/* Hero */
.hero{
  position:relative;display:flex;align-items:center;
  min-height:70vh;padding:clamp(4rem,8vw,7rem) 0;
  background:linear-gradient(120deg,rgba(11,43,79,.86),rgba(11,43,79,.60)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color:#fff;
}
.hero-inner{position:relative;z-index:2;max-width:760px;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.05em;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);
  color:#fff;padding:6px 14px;border-radius:999px;margin-bottom:22px;
}
.hero-badge i{font-size:12px;}
.hero h1{
  font-size:clamp(2rem,4.5vw,3rem);font-weight:800;line-height:1.24;
  letter-spacing:-.01em;margin-bottom:18px;text-shadow:0 2px 12px rgba(0,0,0,.15);
}
.hero p{
  font-size:clamp(1rem,1.6vw,1.15rem);line-height:1.75;color:rgba(255,255,255,.88);
  max-width:600px;margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.hero-note{margin-top:28px;font-size:13px;color:rgba(255,255,255,.7);display:flex;align-items:center;gap:8px;}
.hero-note i{color:rgba(255,255,255,.8);}

/* Overview */
.overview-section{background:var(--color-surface);}
.overview-block{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.overview-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow-md);border:1px solid var(--color-border);}
.overview-content .section-tag{margin-bottom:12px;}
.overview-content h2{
  font-size:clamp(1.5rem,3vw,2rem);font-weight:700;color:var(--color-primary);
  line-height:1.35;margin-bottom:16px;
}
.overview-content p{color:var(--color-text-secondary);margin-bottom:18px;}
.overview-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;}
.overview-tags span{
  font-size:13px;font-weight:500;color:var(--color-text);
  background:var(--color-bg);border:1px solid var(--color-border);
  padding:6px 12px;border-radius:6px;
}
.overview-links{margin-top:22px;display:flex;flex-wrap:wrap;gap:12px;}

/* Guide cards */
.guide-section{background:var(--color-bg);}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.guide-card{
  background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease;
}
.guide-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.guide-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--color-bg);}
.guide-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.guide-card:hover .guide-media img{transform:scale(1.03);}
.guide-media .media-tag{
  position:absolute;left:14px;top:14px;z-index:2;
  background:rgba(11,43,79,.82);color:#fff;font-size:12px;font-weight:600;
  padding:5px 10px;border-radius:6px;letter-spacing:.03em;
}
.guide-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.guide-body h3{font-size:1.2rem;font-weight:700;color:var(--color-primary);margin-bottom:10px;}
.guide-body p{font-size:14px;line-height:1.7;color:var(--color-text-secondary);margin-bottom:18px;flex:1;}
.guide-more{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--color-accent);
}
.guide-more i{transition:transform .2s ease;}
.guide-more:hover i{transform:translateX(4px);}

/* Scenes */
.scene-section{background:var(--color-surface);}
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.scene-item{
  background:var(--color-bg);border:1px solid var(--color-border);
  border-radius:var(--radius-lg);padding:28px 22px;text-align:center;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease;
}
.scene-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);background:#fff;}
.scene-icon{
  width:56px;height:56px;margin:0 auto 16px;border-radius:14px;
  background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:22px;
}
.scene-item h3{font-size:1.05rem;font-weight:700;color:var(--color-primary);margin-bottom:8px;}
.scene-item p{font-size:14px;color:var(--color-text-secondary);line-height:1.65;}

/* Steps */
.steps-section{background:var(--color-bg);}
.steps-row{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step;}
.step{
  position:relative;background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-lg);padding:30px 22px 26px;
  transition:box-shadow .25s ease,transform .25s ease;
}
.step:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);}
.step-num{
  font-size:13px;font-weight:700;color:var(--color-highlight);
  letter-spacing:.05em;margin-bottom:12px;display:flex;align-items:center;gap:6px;
}
.step-num::before{
  content:"";width:18px;height:2px;background:var(--color-highlight);border-radius:2px;display:inline-block;
}
.step h4{font-size:1.05rem;font-weight:700;color:var(--color-primary);margin-bottom:8px;}
.step p{font-size:14px;color:var(--color-text-secondary);line-height:1.65;}

/* CTA */
.cta-section{background:var(--color-surface);}
.cta-panel{
  background:linear-gradient(135deg,#EAF1FB,#E4F0F5);
  border:1px solid var(--color-border);border-radius:var(--radius-lg);
  padding:clamp(2.5rem,5vw,4rem);text-align:center;
}
.cta-panel h2{font-size:clamp(1.5rem,2.5vw,2rem);color:var(--color-primary);font-weight:700;margin-bottom:12px;}
.cta-panel p{color:var(--color-text-secondary);max-width:560px;margin:0 auto 26px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}

/* FAQ */
.faq-section{background:var(--color-bg);}
.faq-list{max-width:820px;margin:0 auto;}
.faq-item{
  background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-md);margin-bottom:14px;overflow:hidden;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item.active{border-color:var(--color-accent);box-shadow:var(--shadow-sm);}
.faq-question{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--color-text);
  text-align:left;cursor:pointer;background:transparent;transition:background .2s ease;
}
.faq-question:hover{background:#F9FBFD;}
.faq-question .faq-toggle{
  flex-shrink:0;width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#EAF1FB;color:var(--color-accent);font-size:13px;
  transition:transform .3s ease,background .3s ease,color .3s ease;
}
.faq-item.active .faq-toggle{transform:rotate(45deg);background:var(--color-accent);color:#fff;}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .3s ease;padding:0 22px;}
.faq-item.active .faq-answer{max-height:400px;padding:0 22px 22px;}
.faq-answer p{font-size:15px;line-height:1.75;color:var(--color-text-secondary);}

/* Footer */
.site-footer{background:var(--color-primary);color:#B8C7DA;padding:60px 0 0;}
.footer-grid{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;
}
.footer-brand .nav-logo{margin-bottom:16px;}
.footer-logo .logo-text{color:#fff;}
.footer-logo .logo-text small{color:#8FA3BA;}
.footer-brand p{font-size:14px;line-height:1.8;color:#B8C7DA;max-width:320px;}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:#B8C7DA;transition:color .2s ease;}
.footer-col ul a:hover{color:#fff;}
.footer-col ul li{font-size:14px;color:#B8C7DA;line-height:1.6;}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  padding:18px 24px;display:flex;flex-wrap:wrap;justify-content:center;gap:12px;
  font-size:12px;color:#8FA3BA;text-align:center;
}

/* Floating CTA */
.float-cta{
  position:fixed;right:28px;bottom:30px;z-index:140;
  display:flex;align-items:center;gap:10px;
  background:var(--color-primary);color:#fff;border:1px solid rgba(255,255,255,.16);
  border-radius:999px;padding:12px 20px;font-size:14px;font-weight:600;
  box-shadow:var(--shadow-lg);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(16px);
  transition:opacity .3s ease,visibility .3s ease,transform .3s ease,background .3s ease;
}
.float-cta i{font-size:18px;color:var(--color-highlight);}
.float-cta.visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:#12395F;}

/* Responsive */
@media (max-width:1024px){
  .side-nav{transform:translateX(-100%);box-shadow:var(--shadow-lg);}
  .side-nav.open{transform:translateX(0);}
  .nav-overlay.open{opacity:1;visibility:visible;}
  .main-wrap{margin-left:0;}
  .menu-toggle{display:flex;}
  .overview-block{grid-template-columns:1fr;gap:32px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .steps-row{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:span 2;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  .hero{min-height:auto;padding:96px 0 64px;text-align:left;}
  .hero h1{font-size:1.7rem;line-height:1.35;}
  .hero p{font-size:18px;}
  .hero-actions .btn{flex:1 1 100%;}
  .section{padding:3.5rem 0;}
  .card-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .steps-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-brand{grid-column:span 1;}
  .cta-actions .btn{flex:1 1 100%;}
  .float-cta{right:16px;bottom:16px;padding:0;width:52px;height:52px;justify-content:center;border-radius:50%;}
  .float-cta span{display:none;}
  .faq-question{font-size:15px;padding:16px 16px;}
  .faq-answer{padding:0 16px;}
  .faq-item.active .faq-answer{padding:0 16px 18px;}
}

/* roulang page: article */
/* ==========================================================
   乐动官方网站 · 文章详情页
   复古创意 · 手作感 · 社区小站
   ========================================================== */
:root {
  --color-primary: #1F3A5F;
  --color-primary-deep: #132A44;
  --color-accent: #3E6B8C;
  --color-accent-dark: #2C526D;
  --color-highlight: #C8694A;
  --color-mustard: #C7A252;
  --color-bg: #F5F1E8;
  --color-surface: #FDFBF7;
  --color-text: #33322B;
  --color-text-secondary: #6A645C;
  --color-border: #D8CFC0;
  --color-border-dark: #B5A892;
  --radius-md: 6px;
  --radius-lg: 14px;
  --shadow-sm: 0 2px 8px rgba(31, 58, 95, 0.08);
  --shadow-md: 0 6px 20px rgba(31, 58, 95, 0.10);
  --shadow-lg: 0 14px 36px rgba(31, 58, 95, 0.15);
  --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-serif: "Songti SC", "SimSun", "Noto Serif SC", Georgia, serif;
  --space-section: clamp(3.5rem, 7vw, 5.5rem) 0;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-accent-dark); }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* ========== 通用按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn i { font-size: 14px; }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-deep);
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-outline:hover {
  background: rgba(62, 107, 140, .08);
  color: var(--color-accent-dark);
  transform: translateY(-1px);
}
.btn-negative {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}
.btn-negative:hover {
  background: rgba(255, 255, 255, .88);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, .6);
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, .12);
  color: #fff;
  border-color: #fff;
}

/* ========== 左侧导航 ========== */
.app-sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 240px;
  height: 100vh;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  z-index: 120;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transition: transform .3s ease;
}
.sidebar-inner {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 20px 0;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 18px 20px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--color-border);
  text-decoration: none;
}
.logo-mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  border-radius: 4px;
}
.logo-mark::after {
  content: '';
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(255, 255, 255, .55);
  border-radius: 2px;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}
.logo-text strong, .logo-text span {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
}
.logo-text small {
  font-size: 11px;
  color: var(--color-text-secondary);
  margin-top: 2px;
}
.nav-group {
  padding: 8px 18px 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--color-text-secondary);
}
.nav-main {
  padding: 4px 0 12px;
}
.nav-main a {
  display: block;
  padding: 8px 18px 8px 30px;
  font-size: 15px;
  color: var(--color-text);
  border-left: 3px solid transparent;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.nav-main a:hover {
  background: rgba(62, 107, 140, .07);
  color: var(--color-accent-dark);
  border-left-color: var(--color-accent);
}
.nav-main a.active {
  background: rgba(62, 107, 140, .08);
  border-left-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}
.sidebar-foot {
  margin-top: auto;
  padding: 16px 18px;
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-text-secondary);
}
.sidebar-foot span { display: block; line-height: 1.6; }

/* 移动端顶栏 */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  z-index: 200;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}
.mobile-topbar .nav-logo {
  border: none;
  margin: 0;
  padding: 0;
  align-items: center;
}
.mobile-topbar .logo-mark { width: 34px; height: 34px; min-width: 34px; font-size: .95rem; }
.mobile-topbar .logo-text strong, .mobile-topbar .logo-text span { font-size: 15px; }
.mobile-topbar .logo-text small { display: none; }
.menu-toggle {
  width: 40px; height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  font-size: 18px;
  color: var(--color-primary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background .2s ease, border-color .2s ease;
}
.menu-toggle:hover { background: rgba(62, 107, 140, .08); border-color: var(--color-accent); }
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(19, 42, 68, .5);
  z-index: 110;
}
.sidebar-overlay.is-visible { display: block; }

/* ========== 主内容区 ========== */
.main-wrapper {
  margin-left: 240px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.article-main {
  flex: 1;
  padding: 32px 0 80px;
}

/* 面包屑 */
.article-breadcrumb {
  max-width: 900px;
  margin: 0 auto 28px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, .7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text-secondary);
}
.article-breadcrumb a { color: var(--color-accent); }
.article-breadcrumb a:hover { color: var(--color-accent-dark); }
.article-breadcrumb .sep { margin: 0 8px; font-size: 11px; color: var(--color-border-dark); }
.article-breadcrumb .current { color: var(--color-text); }

/* 文章卡片 */
.article-card {
  max-width: 900px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
  padding: clamp(28px, 6vw, 56px);
}
.article-card::before {
  content: '';
  position: absolute;
  inset: 7px;
  border: 1px dashed var(--color-border);
  border-radius: calc(var(--radius-lg) - 5px);
  pointer-events: none;
}
.article-inner {
  position: relative;
  z-index: 1;
}
.article-kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-highlight);
  letter-spacing: .1em;
  margin-bottom: 14px;
  padding: 3px 10px;
  border: 1px solid rgba(200, 105, 74, .4);
  border-radius: var(--radius-md);
  background: rgba(200, 105, 74, .05);
}
.article-header { text-align: center; margin-bottom: 36px; }
.article-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--color-primary);
  margin-bottom: 16px;
  word-break: break-word;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-secondary);
}
.article-meta .meta-tag {
  display: inline-block;
  padding: 2px 10px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
}
.article-meta .meta-sep { color: var(--color-border-dark); }
.article-meta i { margin-right: 4px; color: var(--color-mustard); }

/* 正文区域 */
.article-content {
  max-width: 720px;
  margin: 0 auto;
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 2;
  color: var(--color-text);
}
.article-content p { margin-bottom: 1.6em; }
.article-content h2 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.45rem;
  color: var(--color-primary);
  margin: 2.2em 0 .8em;
  padding-bottom: .35em;
  border-bottom: 3px solid var(--color-highlight);
  display: inline-block;
}
.article-content h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-primary);
  margin: 1.8em 0 .7em;
}
.article-content h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text);
  margin: 1.5em 0 .5em;
}
.article-content a { text-decoration: underline; text-underline-offset: 3px; }
.article-content ul, .article-content ol { margin: 0 0 1.6em 1.3em; }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: .4em; }
.article-content blockquote {
  margin: 2em 0;
  padding: 16px 24px;
  border-left: 4px solid var(--color-highlight);
  background: rgba(200, 105, 74, .05);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}
.article-content blockquote p { margin-bottom: 0; }
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin: 2em auto;
}
.article-content figcaption {
  font-size: 13px;
  text-align: center;
  color: var(--color-text-secondary);
  margin-top: -1em;
  margin-bottom: 2em;
}
.article-content hr {
  border: none;
  height: 4px;
  width: 45px;
  background: var(--color-highlight);
  border-radius: 4px;
  margin: 3em auto;
}
.article-content pre {
  background: var(--color-primary-deep);
  color: #E8E4DA;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: .9rem;
  line-height: 1.7;
  margin-bottom: 1.8em;
}
.article-content code {
  background: rgba(31, 58, 95, .08);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", Consolas, "Liberation Mono", monospace;
  font-size: .85em;
}
.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  font-size: .95rem;
  font-family: var(--font-sans);
}
.article-content th, .article-content td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
}
.article-content th {
  background: var(--color-bg);
  font-weight: 700;
  color: var(--color-primary);
}
.article-content mark {
  background: rgba(199, 162, 82, .25);
  color: var(--color-primary);
  padding: 0 4px;
  border-radius: 3px;
}

/* 文章分隔 + 操作区 */
.article-divider {
  width: 60px;
  height: 4px;
  background: var(--color-highlight);
  border-radius: 4px;
  margin: 48px auto 32px;
}
.article-action {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 8px 0 32px;
}

/* 上一篇 / 下一篇 */
.article-pagination {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}
.back-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}
.back-link i { margin-right: 6px; }
.pager-links {
  display: flex;
  gap: 10px;
}
.pager-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  cursor: default;
}
.pager-item i { font-size: 12px; }

/* 内容未找到 */
.article-empty {
  max-width: 640px;
  margin: 64px auto;
  background: var(--color-surface);
  border: 1px dashed var(--color-border-dark);
  border-radius: var(--radius-lg);
  padding: 64px 32px;
  text-align: center;
}
.empty-icon {
  width: 72px; height: 72px;
  margin: 0 auto 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--color-mustard);
}
.article-empty h1 {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.article-empty p { color: var(--color-text-secondary); margin-bottom: 24px; }

/* 相关阅读 */
.related-section {
  max-width: 900px;
  margin: 56px auto 0;
}
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 8px;
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-highlight);
  border-radius: 3px;
  margin: 12px auto 0;
}
.section-sub {
  text-align: center;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin: 8px 0 32px;
}
.related-grid { margin-top: 16px; }
.related-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
  text-decoration: none;
  color: var(--color-text);
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  color: var(--color-text);
}
.related-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}
.related-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.related-card:hover .related-thumb img { transform: scale(1.04); }
.related-card-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.related-card-body h4 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}
.related-card-body p {
  font-size: 14px;
  color: var(--color-text-secondary);
  flex: 1;
  margin-bottom: 14px;
  line-height: 1.7;
}
.related-meta {
  font-size: 13px;
  color: var(--color-border-dark);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* CTA 横幅 */
.article-cta {
  max-width: 900px;
  margin: 56px auto 0;
  background-image: linear-gradient(rgba(31, 58, 95, .82), rgba(19, 42, 68, .9)), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.article-cta::before {
  content: '';
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: calc(var(--radius-lg) - 6px);
  pointer-events: none;
}
.article-cta h3 {
  position: relative;
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
  margin-bottom: 10px;
  color: #fff;
}
.article-cta p {
  position: relative;
  font-size: 15px;
  color: rgba(255, 255, 255, .78);
  margin-bottom: 24px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--color-primary-deep);
  color: #A8B8C8;
  padding: 56px 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 40px;
}
.footer-brand .nav-logo {
  border: none;
  padding: 0;
  margin-bottom: 16px;
}
.footer-logo .logo-text strong, .footer-logo .logo-text span { color: #fff; }
.footer-logo .logo-text small { color: #A8B8C8; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: #A8B8C8;
  margin-top: 12px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 32px; height: 2px;
  background: var(--color-highlight);
}
.footer-col ul li { margin-bottom: 10px; font-size: 14px; }
.footer-col a {
  color: #A8B8C8;
  font-size: 14px;
  transition: color .2s ease;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 20px 24px;
  text-align: center;
  font-size: 13px;
  color: #7F92A5;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 16px;
}

/* ========== 响应式断点 ========== */
@media (max-width: 1024px) {
  .app-sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
    width: 280px;
  }
  .app-sidebar.is-open { transform: translateX(0); }
  .mobile-topbar { display: flex; }
  .main-wrapper { margin-left: 0; padding-top: 56px; }
  .sidebar-overlay.is-visible { display: block; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .article-main { padding: 20px 0 60px; }
  .article-card { padding: 20px 18px; }
  .article-card::before { inset: 5px; }
  .article-content { font-size: 16px; line-height: 1.9; }
  .article-content blockquote { padding: 14px 16px; }
  .article-pagination { flex-direction: column; align-items: flex-start; }
  .pager-links { width: 100%; justify-content: space-between; }
  .related-grid .related-col { padding-bottom: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .article-cta { padding: 36px 20px; }
  .cta-actions .btn { width: 100%; }
  .article-action .btn { width: 100%; }
  .btn { height: 42px; }
}

@media (max-width: 480px) {
  .article-meta { font-size: 13px; gap: 6px; }
  .related-meta { font-size: 12px; }
  .footer-col ul li { font-size: 13px; }
}

/* roulang page: category2 */
/* ==================== 设计变量 ==================== */
    :root {
      --color-primary: #2E3B37;
      --color-accent: #BB6B4A;
      --color-highlight: #C9A227;
      --color-bg: #F5F1E8;
      --color-surface: #FFFDF8;
      --color-text: #2C2A26;
      --color-text-secondary: #6E675E;
      --color-border: #DDD3C3;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 14px;
      --shadow-sm: 0 2px 8px rgba(46, 59, 55, .08);
      --shadow-md: 0 8px 24px rgba(46, 59, 55, .12);
      --shadow-lg: 0 16px 40px rgba(46, 59, 55, .16);
      --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
      --space-section: clamp(3.5rem, 7vw, 6rem) 0;
    }

    /* ==================== Reset & Base ==================== */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--color-bg);
      background-image: radial-gradient(rgba(46, 59, 55, .035) 1px, transparent 1px);
      background-size: 22px 22px;
      color: var(--color-text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    body.nav-open {
      overflow: hidden;
    }

    img {
      max-width: 100%;
      display: block;
    }

    a {
      color: var(--color-accent);
      text-decoration: none;
      transition: color .25s ease, border-color .25s ease, background .25s ease, box-shadow .25s ease;
    }

    a:hover {
      color: #964E32;
    }

    button {
      font-family: inherit;
      border: none;
      cursor: pointer;
    }

    ul,
    ol {
      margin: 0;
      padding: 0;
    }

    h1,
    h2,
    h3,
    h4,
    p {
      margin-top: 0;
    }

    h1,
    h2,
    h3,
    h4 {
      font-family: var(--font-serif);
      color: var(--color-primary);
      line-height: 1.3;
    }

    :focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 2px;
    }

    /* ==================== App Shell 布局 ==================== */
    .app-shell {
      min-height: 100vh;
    }

    .content-area {
      margin-left: 250px;
    }

    .sidebar-overlay {
      display: none;
    }

    /* ==================== 侧边栏导航 ==================== */
    .site-sidebar {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: 250px;
      background: var(--color-surface);
      border-right: 1px solid var(--color-border);
      z-index: 60;
      display: flex;
      flex-direction: column;
      transition: transform .3s ease, box-shadow .3s ease;
    }

    .sidebar-brand {
      padding: 26px 22px 18px;
      border-bottom: 1px dashed var(--color-border);
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .logo-mark {
      width: 44px;
      height: 44px;
      background: var(--color-primary);
      color: var(--color-bg);
      border: 2px solid var(--color-highlight);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 20px;
      font-family: var(--font-serif);
      letter-spacing: .04em;
    }

    .logo-text {
      font-size: 17px;
      font-weight: 700;
      color: var(--color-primary);
      line-height: 1.3;
    }

    .logo-text small {
      display: block;
      font-size: 11px;
      font-weight: 400;
      color: var(--color-text-secondary);
      letter-spacing: .06em;
      margin-top: 2px;
    }

    .sidebar-nav {
      flex: 1;
      overflow-y: auto;
      padding: 14px 0;
    }

    .nav-group {
      padding: 18px 22px 6px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: .16em;
      color: var(--color-text-secondary);
    }

    .nav-main {
      list-style: none;
    }

    .nav-main li a {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 9px 22px;
      color: var(--color-text);
      font-size: 14.5px;
      font-weight: 500;
      border-left: 3px solid transparent;
      position: relative;
    }

    .nav-main li a i {
      width: 20px;
      text-align: center;
      font-size: 14px;
      color: var(--color-text-secondary);
      transition: color .2s;
    }

    .nav-main li a:hover {
      background: rgba(187, 107, 74, .07);
      color: var(--color-accent);
    }

    .nav-main li a:hover i {
      color: var(--color-accent);
    }

    .nav-main li a.active {
      background: rgba(46, 59, 55, .07);
      border-left-color: var(--color-accent);
      color: var(--color-primary);
      font-weight: 700;
    }

    .nav-main li a.active i {
      color: var(--color-accent);
    }

    .sidebar-foot {
      padding: 18px 22px;
      border-top: 1px dashed var(--color-border);
      font-size: 12px;
      color: var(--color-text-secondary);
      line-height: 1.7;
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .sidebar-foot strong {
      color: var(--color-primary);
      font-weight: 600;
    }

    /* ==================== 移动端顶栏 ==================== */
    .mobile-topbar {
      display: none;
      position: sticky;
      top: 0;
      z-index: 55;
      height: 58px;
      background: var(--color-primary);
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
      box-shadow: 0 2px 10px rgba(46, 59, 55, .12);
    }

    .mobile-topbar .nav-logo .logo-mark {
      width: 36px;
      height: 36px;
      font-size: 16px;
    }

    .mobile-topbar .nav-logo .logo-text {
      color: var(--color-bg);
    }

    .mobile-topbar .nav-logo .logo-text small {
      color: rgba(245, 241, 232, .65);
    }

    .menu-toggle {
      background: transparent;
      color: var(--color-bg);
      font-size: 22px;
      width: 42px;
      height: 42px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .menu-toggle:hover {
      background: rgba(255, 255, 255, .12);
    }

    /* ==================== 按钮 ==================== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
      line-height: 1.4;
      border: 2px solid transparent;
      transition: all .25s ease;
      text-align: center;
    }

    .btn i {
      font-size: 14px;
    }

    .btn-primary {
      background: var(--color-accent);
      border-color: var(--color-accent);
      color: #fff;
      box-shadow: 3px 3px 0 rgba(46, 59, 55, .18);
    }

    .btn-primary:hover {
      background: var(--color-primary);
      border-color: var(--color-primary);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 4px 4px 0 rgba(46, 59, 55, .14);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 2px 2px 0 rgba(46, 59, 55, .18);
    }

    .btn-outline {
      border-color: var(--color-accent);
      color: var(--color-accent);
      background: transparent;
    }

    .btn-outline:hover {
      background: var(--color-accent);
      color: #fff;
      transform: translateY(-2px);
    }

    .btn-outline-light {
      border-color: rgba(255, 255, 255, .72);
      color: #fff;
      background: transparent;
    }

    .btn-outline-light:hover {
      background: rgba(255, 255, 255, .14);
      color: #fff;
      transform: translateY(-2px);
    }

    .btn-ghost {
      border-color: var(--color-border);
      color: var(--color-text);
      background: transparent;
    }

    .btn-ghost:hover {
      border-color: var(--color-primary);
      color: var(--color-primary);
      background: rgba(46, 59, 55, .04);
    }

    /* ==================== Hero ==================== */
    .page-hero {
      position: relative;
      background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
      min-height: 420px;
      display: flex;
      align-items: center;
      color: #fff;
      border-bottom: 4px solid var(--color-highlight);
    }

    .page-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(46, 59, 55, .93) 0%, rgba(46, 59, 55, .82) 42%, rgba(120, 78, 55, .62) 100%);
    }

    .hero-inner {
      position: relative;
      z-index: 2;
      padding: clamp(48px, 7vw, 80px) clamp(24px, 5vw, 72px);
      max-width: 1260px;
      margin: 0 auto;
      width: 100%;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(201, 162, 39, .22);
      border: 1px solid rgba(201, 162, 39, .4);
      color: #F3E2B3;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: .14em;
      padding: 4px 14px;
      border-radius: var(--radius-sm);
      margin-bottom: 20px;
      text-transform: uppercase;
    }

    .hero-tag::before {
      content: '';
      width: 8px;
      height: 8px;
      background: var(--color-highlight);
      transform: rotate(45deg);
    }

    .page-hero h1 {
      font-size: clamp(2.2rem, 4.2vw, 3.2rem);
      font-weight: 800;
      color: var(--color-bg);
      margin-bottom: 16px;
      letter-spacing: .01em;
      text-shadow: 0 2px 12px rgba(0, 0, 0, .25);
    }

    .hero-sub {
      font-size: clamp(1rem, 1.7vw, 1.2rem);
      color: rgba(245, 241, 232, .9);
      max-width: 640px;
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
    }

    .hero-meta-line {
      display: flex;
      align-items: center;
      gap: 18px;
      margin-top: 36px;
      padding-top: 18px;
      border-top: 1px dashed rgba(245, 241, 232, .25);
      font-size: 13px;
      color: rgba(245, 241, 232, .7);
    }

    .hero-meta-line i {
      color: var(--color-highlight);
      margin-right: 4px;
    }

    /* ==================== 通用 Section ==================== */
    .section {
      padding: var(--space-section);
      position: relative;
    }

    .section-inner {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 clamp(16px, 4vw, 32px);
      width: 100%;
    }

    .section-head {
      text-align: center;
      max-width: 740px;
      margin: 0 auto 42px;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .16em;
      color: var(--color-accent);
      text-transform: uppercase;
      margin-bottom: 12px;
    }

    .section-tag::before {
      content: '';
      width: 10px;
      height: 10px;
      background: var(--color-accent);
      transform: rotate(45deg);
    }

    .section-tag::after {
      content: '';
      width: 10px;
      height: 10px;
      border: 2px solid var(--color-accent);
      transform: rotate(45deg);
    }

    .section-head h2 {
      font-size: clamp(1.7rem, 3vw, 2.3rem);
      margin-bottom: 14px;
    }

    .section-head p {
      color: var(--color-text-secondary);
      font-size: 16px;
      line-height: 1.8;
    }

    /* ==================== 分类描述区 ==================== */
    .intro-section {
      background: var(--color-surface);
      border-bottom: 1px solid var(--color-border);
    }

    .intro-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: clamp(24px, 4vw, 56px);
      align-items: center;
    }

    .intro-copy h2 {
      font-size: clamp(1.4rem, 2.4vw, 1.9rem);
      margin-bottom: 16px;
    }

    .intro-copy>p {
      color: var(--color-text-secondary);
      font-size: 15px;
      line-height: 1.9;
      margin-bottom: 20px;
    }

    .intro-list {
      list-style: none;
      margin: 0 0 26px;
    }

    .intro-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      padding: 5px 0;
      font-size: 15px;
      color: var(--color-text);
    }

    .intro-list li i {
      color: var(--color-accent);
      margin-top: 5px;
      font-size: 13px;
    }

    .intro-link {
      font-weight: 600;
      font-size: 15px;
    }

    .intro-link i {
      margin-left: 4px;
      transition: transform .2s;
    }

    .intro-link:hover i {
      transform: translateX(4px);
    }

    .intro-note {
      background: var(--color-bg);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .intro-note::before {
      content: '编 辑 手 记';
      position: absolute;
      top: -11px;
      left: 24px;
      background: var(--color-accent);
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      letter-spacing: .12em;
      padding: 2px 12px;
      border-radius: var(--radius-sm);
    }

    .intro-note p {
      font-family: var(--font-serif);
      font-size: 16px;
      color: var(--color-primary);
      line-height: 2;
      margin: 0 0 16px;
    }

    .note-sign {
      font-size: 14px;
      color: var(--color-text-secondary);
      text-align: right;
      border-top: 1px dashed var(--color-border);
      padding-top: 12px;
    }

    /* ==================== 内容卡片网格 ==================== */
    .modules-section {
      background: var(--color-bg);
    }

    .bcard {
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: transform .25s ease, box-shadow .25s ease;
    }

    .bcard:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .bcard-img {
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: var(--color-border);
      position: relative;
    }

    .bcard-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .45s ease;
    }

    .bcard:hover .bcard-img img {
      transform: scale(1.05);
    }

    .bcard-img .img-label {
      position: absolute;
      left: 12px;
      bottom: 12px;
      background: rgba(46, 59, 55, .78);
      color: var(--color-bg);
      font-size: 12px;
      padding: 3px 12px;
      border-radius: 20px;
      letter-spacing: .06em;
      backdrop-filter: blur(2px);
    }

    .bcard-body {
      padding: 24px 24px 26px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .bcard-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: var(--color-accent);
      background: rgba(187, 107, 74, .1);
      border: 1px solid rgba(187, 107, 74, .2);
      padding: 3px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      letter-spacing: .06em;
      align-self: flex-start;
    }

    .bcard-body h3 {
      font-size: 1.25rem;
      margin-bottom: 10px;
    }

    .bcard-body p {
      font-size: 14.5px;
      color: var(--color-text-secondary);
      line-height: 1.75;
      flex: 1;
      margin-bottom: 18px;
    }

    .bcard-link {
      font-size: 14px;
      font-weight: 600;
      align-self: flex-start;
    }

    .bcard-link i {
      margin-left: 4px;
      transition: transform .2s;
    }

    .bcard-link:hover i {
      transform: translateX(4px);
    }

    /* ==================== 获取渠道（深色区块） ==================== */
    .channels-section {
      background: var(--color-primary);
      color: rgba(245, 241, 232, .85);
      border-top: 4px double rgba(201, 162, 39, .35);
      border-bottom: 4px double rgba(201, 162, 39, .35);
    }

    .channels-section .section-head h2 {
      color: var(--color-bg);
    }

    .channels-section .section-head p {
      color: rgba(245, 241, 232, .7);
    }

    .channels-section .section-tag {
      color: var(--color-highlight);
    }

    .channels-section .section-tag::before {
      background: var(--color-highlight);
    }

    .channels-section .section-tag::after {
      border-color: var(--color-highlight);
    }

    .channel-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .channel-item {
      background: rgba(255, 255, 255, .05);
      border: 1px dashed rgba(245, 241, 232, .32);
      border-radius: var(--radius-lg);
      padding: 30px 26px;
      position: relative;
      transition: background .25s, transform .25s, border-color .25s;
    }

    .channel-item:hover {
      background: rgba(255, 255, 255, .09);
      border-color: rgba(201, 162, 39, .5);
      transform: translateY(-3px);
    }

    .channel-num {
      font-family: var(--font-serif);
      font-size: 44px;
      font-weight: 800;
      color: var(--color-highlight);
      line-height: 1;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .channel-num::after {
      content: '';
      width: 32px;
      height: 1px;
      background: rgba(201, 162, 39, .5);
    }

    .channel-item h3 {
      color: var(--color-bg);
      font-size: 1.2rem;
      margin-bottom: 10px;
    }

    .channel-item p {
      font-size: 14.5px;
      line-height: 1.8;
      color: rgba(245, 241, 232, .72);
      margin-bottom: 0;
    }

    .channel-item i {
      position: absolute;
      right: 26px;
      top: 24px;
      font-size: 30px;
      color: rgba(201, 162, 39, .28);
    }

    /* ==================== CTA 横幅 ==================== */
    .cta-section {
      background: var(--color-surface);
    }

    .cta-banner {
      text-align: center;
      background: linear-gradient(135deg, rgba(201, 162, 39, .12), rgba(187, 107, 74, .1)), var(--color-bg);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: clamp(36px, 6vw, 64px) clamp(24px, 5vw, 72px);
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .cta-banner::before,
    .cta-banner::after {
      content: '';
      position: absolute;
      width: 22px;
      height: 22px;
      border-color: var(--color-accent);
      border-style: solid;
    }

    .cta-banner::before {
      top: 16px;
      left: 16px;
      border-width: 3px 0 0 3px;
    }

    .cta-banner::after {
      bottom: 16px;
      right: 16px;
      border-width: 0 3px 3px 0;
    }

    .cta-banner h2 {
      font-size: clamp(1.5rem, 3vw, 2rem);
      margin-bottom: 12px;
    }

    .cta-banner p {
      color: var(--color-text-secondary);
      max-width: 560px;
      margin: 0 auto 28px;
      font-size: 15px;
    }

    .cta-actions {
      display: flex;
      gap: 14px;
      justify-content: center;
      flex-wrap: wrap;
    }

    /* ==================== FAQ ==================== */
    .faq-section {
      background: var(--color-bg);
    }

    .faq-list {
      max-width: 840px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      transition: box-shadow .25s, border-color .25s;
    }

    .faq-item[open] {
      border-color: rgba(187, 107, 74, .45);
      box-shadow: var(--shadow-sm);
    }

    .faq-item summary {
      padding: 20px 58px 20px 24px;
      font-family: var(--font-serif);
      font-size: 16px;
      font-weight: 700;
      color: var(--color-primary);
      cursor: pointer;
      list-style: none;
      position: relative;
      line-height: 1.5;
      transition: background .2s;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary:hover {
      background: rgba(187, 107, 74, .06);
    }

    .faq-item summary::after {
      content: '+';
      position: absolute;
      right: 22px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 24px;
      font-weight: 400;
      color: var(--color-accent);
      transition: transform .25s ease;
      line-height: 1;
    }

    .faq-item[open] summary::after {
      transform: translateY(-50%) rotate(45deg);
    }

    .faq-answer {
      padding: 0 24px 22px;
      border-top: 1px dashed var(--color-border);
      margin: 0 4px;
    }

    .faq-answer p {
      margin: 16px 0 0;
      font-size: 15px;
      color: var(--color-text-secondary);
      line-height: 1.9;
    }

    /* ==================== 页脚 ==================== */
    .site-footer {
      background: var(--color-primary);
      color: rgba(245, 241, 232, .68);
      padding: 56px 0 20px;
      margin-left: 250px;
      border-top: 4px solid var(--color-highlight);
    }

    .footer-grid {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 clamp(16px, 4vw, 32px);
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 40px;
    }

    .footer-brand .nav-logo {
      margin-bottom: 16px;
    }

    .footer-brand .logo-mark {
      width: 40px;
      height: 40px;
      font-size: 18px;
    }

    .footer-brand .logo-text {
      color: var(--color-bg);
    }

    .footer-brand .logo-text small {
      color: rgba(245, 241, 232, .55);
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.9;
      color: rgba(245, 241, 232, .62);
      max-width: 320px;
    }

    .footer-col h4 {
      color: var(--color-bg);
      font-size: 16px;
      margin-bottom: 16px;
      font-weight: 700;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
      font-size: 14px;
      line-height: 1.7;
    }

    .footer-col ul li a {
      color: rgba(245, 241, 232, .68);
    }

    .footer-col ul li a:hover {
      color: var(--color-highlight);
    }

    .footer-bottom {
      max-width: 1200px;
      margin: 40px auto 0;
      padding: 18px clamp(16px, 4vw, 32px) 0;
      border-top: 1px solid rgba(245, 241, 232, .12);
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 12px;
      color: rgba(245, 241, 232, .45);
    }

    /* ==================== 浮动 CTA ==================== */
    .float-cta {
      position: fixed;
      right: 22px;
      bottom: 22px;
      z-index: 80;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--color-accent);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      box-shadow: 0 8px 24px rgba(187, 107, 74, .38);
      transition: transform .25s, box-shadow .25s, background .25s;
      border: 2px solid rgba(255, 255, 255, .6);
    }

    .float-cta:hover {
      background: var(--color-primary);
      transform: scale(1.06);
      box-shadow: 0 10px 28px rgba(46, 59, 55, .35);
      color: var(--color-bg);
    }

    .cta-bubble {
      position: absolute;
      right: 62px;
      background: var(--color-primary);
      color: var(--color-bg);
      font-size: 13px;
      font-weight: 500;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      white-space: nowrap;
      opacity: 0;
      transform: translateX(6px);
      transition: opacity .25s, transform .25s;
      pointer-events: none;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(245, 241, 232, .2);
    }

    .cta-bubble::after {
      content: '';
      position: absolute;
      right: -5px;
      top: 50%;
      transform: translateY(-50%) rotate(45deg);
      width: 8px;
      height: 8px;
      background: var(--color-primary);
      border-right: 1px solid rgba(245, 241, 232, .2);
      border-top: 1px solid rgba(245, 241, 232, .2);
    }

    .float-cta:hover .cta-bubble {
      opacity: 1;
      transform: translateX(0);
    }

    /* ==================== Foundation 网格微调 ==================== */
    .grid-margin-x {
      margin-left: -12px;
      margin-right: -12px;
    }

    .grid-margin-x>.cell {
      margin-left: 12px;
      margin-right: 12px;
    }

    /* ==================== 响应式 ==================== */
    @media (max-width: 1024px) {
      .site-sidebar {
        transform: translateX(-105%);
        box-shadow: none;
        width: 270px;
      }

      .site-sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
      }

      .sidebar-overlay.show {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(46, 59, 55, .5);
        z-index: 50;
        backdrop-filter: blur(2px);
      }

      .content-area {
        margin-left: 0;
      }

      .site-footer {
        margin-left: 0;
      }

      .mobile-topbar {
        display: flex;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        row-gap: 32px;
      }

      .channel-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .intro-grid {
        grid-template-columns: 1fr;
      }

      .intro-note {
        margin-top: 8px;
      }

      .section-head {
        margin-bottom: 32px;
      }
    }

    @media (max-width: 640px) {
      .page-hero {
        min-height: 360px;
      }

      .hero-inner {
        padding: 40px 20px;
      }

      .hero-actions .btn {
        width: 100%;
      }

      .channel-grid {
        grid-template-columns: 1fr;
      }

      .channel-item {
        padding: 24px 20px;
      }

      .channel-item i {
        font-size: 24px;
        right: 20px;
        top: 22px;
      }

      .cta-actions .btn {
        width: 100%;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .footer-bottom {
        justify-content: center;
        text-align: center;
      }

      .float-cta {
        width: 46px;
        height: 46px;
        right: 16px;
        bottom: 16px;
        font-size: 18px;
      }

      .cta-bubble {
        display: none;
      }

      .faq-item summary {
        font-size: 15px;
        padding: 16px 50px 16px 18px;
      }
    }

/* roulang page: category3 */
:root {
            --color-primary: #0B2B4F;
            --color-primary-light: #16406B;
            --color-accent: #1E6FD9;
            --color-accent-dark: #155CB8;
            --color-highlight: #FF7F50;
            --color-highlight-dark: #E5643A;
            --color-bg: #F5F8FC;
            --color-surface: #FFFFFF;
            --color-text: #2E3A45;
            --color-text-secondary: #6B7A88;
            --color-text-muted: #9AA6B2;
            --color-border: #E3E9F0;
            --radius-md: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(11, 43, 79, .06);
            --shadow-md: 0 8px 24px rgba(11, 43, 79, .09);
            --shadow-lg: 0 16px 40px rgba(11, 43, 79, .12);
            --space-section: clamp(4rem, 7vw, 6rem) 0;
            --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 16px;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: var(--color-accent-dark);
        }
        ul {
            list-style: none;
        }

        /* ===== 左侧导航 ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: var(--color-surface);
            border-right: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform .3s ease;
        }
        .nav-header {
            padding: 28px 20px 16px;
            border-bottom: 1px solid var(--color-border);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 800;
            font-size: 16px;
            border-radius: 10px;
            letter-spacing: .04em;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.3;
            display: flex;
            flex-direction: column;
        }
        .logo-text small {
            font-size: 11px;
            font-weight: 400;
            color: var(--color-text-muted);
            letter-spacing: .06em;
        }
        .nav-body {
            flex: 1;
            overflow-y: auto;
            padding: 16px 0;
        }
        .nav-group {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-text-muted);
            padding: 14px 26px 6px;
            text-transform: uppercase;
            letter-spacing: .08em;
        }
        .nav-main {
            margin: 0;
            padding: 0;
        }
        .nav-main li {
            margin: 0;
        }
        .nav-main a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 26px 11px 26px;
            font-size: 15px;
            color: var(--color-text);
            border-left: 3px solid transparent;
            transition: background .2s ease, color .2s ease, border-color .2s ease;
        }
        .nav-main a:hover {
            background: rgba(30, 111, 217, .05);
            color: var(--color-accent);
        }
        .nav-main a.active {
            background: rgba(30, 111, 217, .08);
            color: var(--color-accent);
            border-left-color: var(--color-accent);
            font-weight: 600;
        }
        .nav-footer {
            padding: 18px 24px;
            border-top: 1px solid var(--color-border);
            font-size: 12px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* ===== 移动端顶栏 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            z-index: 1100;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: var(--shadow-sm);
        }
        .mobile-header .nav-logo .logo-mark {
            width: 34px;
            height: 34px;
            font-size: 14px;
            border-radius: 8px;
        }
        .mobile-header .nav-logo .logo-text {
            font-size: 16px;
        }
        .menu-toggle {
            width: 40px;
            height: 40px;
            background: transparent;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            font-size: 18px;
            color: var(--color-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background .2s ease;
        }
        .menu-toggle:hover {
            background: rgba(30, 111, 217, .06);
        }
        .drawer-mask {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(11, 43, 79, .45);
            z-index: 1050;
            opacity: 0;
            transition: opacity .3s ease;
        }
        .drawer-mask.show {
            opacity: 1;
        }

        /* ===== 主内容区布局 ===== */
        .page-wrap {
            margin-left: 240px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .site-main {
            flex: 1;
        }

        /* ===== 通用容器/板块 ===== */
        .grid-container {
            max-width: var(--container-w);
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 44px;
        }
        .section-head .section-tag {
            display: inline-block;
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: clamp(1.6rem, 3vw, 2rem);
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 10px;
            line-height: 1.3;
        }
        .section-head p {
            color: var(--color-text-secondary);
            font-size: 16px;
            line-height: 1.7;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            background: rgba(255, 127, 80, .12);
            color: var(--color-highlight-dark);
            font-size: 13px;
            font-weight: 600;
            border-radius: 20px;
            letter-spacing: .02em;
        }
        .section-tag-blue {
            background: rgba(30, 111, 217, .1);
            color: var(--color-accent);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            padding: 14px 0 0;
            font-size: 13px;
            color: var(--color-text-secondary);
        }
        .breadcrumb-bar a {
            color: var(--color-text-secondary);
            text-decoration: none;
        }
        .breadcrumb-bar a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-bar .sep {
            margin: 0 8px;
            color: var(--color-text-muted);
        }
        .breadcrumb-bar .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* ===== 分类Banner ===== */
        .category-banner {
            position: relative;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 340px;
            display: flex;
            align-items: center;
            padding: 70px 0 60px;
            margin-top: 0;
        }
        .category-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(110deg, rgba(11, 43, 79, .88) 20%, rgba(11, 43, 79, .55) 70%, rgba(11, 43, 79, .3) 100%);
        }
        .category-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        .category-banner .breadcrumb-bar {
            padding: 0;
            margin-bottom: 20px;
            color: rgba(255, 255, 255, .75);
        }
        .category-banner .breadcrumb-bar a {
            color: rgba(255, 255, 255, .8);
        }
        .category-banner .breadcrumb-bar a:hover {
            color: #fff;
        }
        .category-banner .breadcrumb-bar .sep {
            color: rgba(255, 255, 255, .5);
        }
        .category-banner .breadcrumb-bar .current {
            color: rgba(255, 255, 255, .95);
        }
        .category-banner .section-tag {
            background: rgba(255, 255, 255, .14);
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .category-banner h1 {
            font-size: clamp(2rem, 4.5vw, 3rem);
            font-weight: 800;
            color: #fff;
            margin: 18px 0 12px;
            letter-spacing: -.01em;
            line-height: 1.25;
        }
        .category-banner .banner-desc {
            font-size: 18px;
            color: rgba(255, 255, 255, .88);
            max-width: 640px;
            line-height: 1.7;
        }

        /* ===== 简介区 ===== */
        .intro-section {
            padding: var(--space-section);
        }
        .intro-box {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 40px;
            display: flex;
            flex-direction: column;
            gap: 14px;
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
        }
        .intro-box::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--color-accent), var(--color-highlight));
        }
        .intro-box h2 {
            font-size: clamp(1.4rem, 2.5vw, 1.8rem);
            font-weight: 700;
            color: var(--color-primary);
        }
        .intro-box p {
            color: var(--color-text-secondary);
            font-size: 16px;
            line-height: 1.8;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--color-accent);
            font-weight: 600;
            font-size: 15px;
            margin-top: 6px;
        }
        .text-link i {
            transition: transform .25s ease;
            font-size: 13px;
        }
        .text-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 卡片网格 ===== */
        .cards-section {
            padding: var(--space-section);
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .category-card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: transform .25s ease, box-shadow .25s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-cover {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--color-primary);
        }
        .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease;
        }
        .category-card:hover .card-cover img {
            transform: scale(1.04);
        }
        .cover-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, .92);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 12px;
            backdrop-filter: blur(4px);
        }
        .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.4;
        }
        .card-body p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .card-body .text-link {
            font-size: 14px;
            margin-top: 6px;
        }

        /* ===== CTA区 ===== */
        .cta-section {
            padding: var(--space-section);
            background: linear-gradient(135deg, #EEF3FA 0%, #E3ECF7 100%);
        }
        .cta-box {
            text-align: center;
            background: rgba(255, 255, 255, .72);
            border: 1px solid rgba(255, 255, 255, .8);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            box-shadow: var(--shadow-sm);
            max-width: 860px;
            margin: 0 auto;
            backdrop-filter: blur(6px);
        }
        .cta-box h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 520px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 46px;
            padding: 0 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all .25s ease;
            cursor: pointer;
            border: none;
        }
        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(30, 111, 217, .28);
        }
        .btn-primary:hover {
            background: var(--color-accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
            background: #0e4a96;
        }
        .btn-outline {
            background: transparent;
            color: var(--color-accent);
            border: 1px solid var(--color-accent);
        }
        .btn-outline:hover {
            background: rgba(30, 111, 217, .08);
            color: var(--color-accent-dark);
            transform: translateY(-2px);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .7);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .14);
            color: #fff;
        }
        .btn:focus-visible,
        .nav-main a:focus-visible,
        .menu-toggle:focus-visible,
        .float-cta:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--space-section);
        }
        .accordion {
            background: transparent;
            border: none;
            margin: 0;
        }
        .accordion-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color .25s ease, box-shadow .25s ease;
        }
        .accordion-item:hover {
            border-color: #c8d4e4;
            box-shadow: var(--shadow-sm);
        }
        .accordion-item.is-active {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-sm);
        }
        .accordion-title {
            font-size: 16px !important;
            font-weight: 600;
            color: var(--color-primary) !important;
            padding: 18px 24px 18px 20px;
            border-bottom: none !important;
            background: transparent;
            display: flex;
            align-items: center;
            gap: 10px;
            position: relative;
        }
        .accordion-title::before {
            content: "";
            width: 6px;
            height: 6px;
            background: var(--color-accent);
            border-radius: 50%;
            flex-shrink: 0;
        }
        .accordion-title::after {
            content: "\f107";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            right: 22px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-muted);
            transition: transform .3s ease;
        }
        .accordion-item.is-active>.accordion-title::after {
            transform: translateY(-50%) rotate(180deg);
            color: var(--color-accent);
        }
        .accordion-content {
            background: #F9FBFD;
            border-top: 1px solid var(--color-border);
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.8;
            padding: 20px 24px 22px 44px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, .85);
            padding: 60px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px 40px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
        }
        .footer-brand p {
            font-size: 14px;
            color: #B8C7DA;
            margin-top: 16px;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-logo {
            color: #fff;
        }
        .footer-logo .logo-mark {
            background: rgba(255, 255, 255, .16);
            color: #fff;
        }
        .footer-logo .logo-text {
            color: #fff;
        }
        .footer-logo .logo-text small {
            color: #B8C7DA;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--color-highlight);
        }
        .footer-col ul {
            margin: 0;
            padding: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
            font-size: 14px;
        }
        .footer-col a {
            color: #B8C7DA;
            transition: color .25s ease, padding-left .25s ease;
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: var(--container-w);
            margin: 0 auto;
            font-size: 12px;
            color: rgba(255, 255, 255, .45);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== 浮动CTA ===== */
        .float-cta {
            position: fixed;
            right: 28px;
            bottom: 34px;
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            border: none;
            font-size: 20px;
            cursor: pointer;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 900;
            opacity: 0;
            visibility: hidden;
            transform: scale(.85);
            transition: all .3s ease;
        }
        .float-cta.visible {
            opacity: 1;
            visibility: visible;
            transform: scale(1);
        }
        .float-cta:hover {
            background: var(--color-accent);
            transform: scale(1.06);
        }
        .float-cta .float-bubble {
            position: absolute;
            right: 66px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--color-surface);
            color: var(--color-text);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 6px;
            box-shadow: var(--shadow-md);
            white-space: nowrap;
            opacity: 0;
            visibility: hidden;
            transition: all .3s ease;
            border: 1px solid var(--color-border);
        }
        .float-cta:hover .float-bubble {
            opacity: 1;
            visibility: visible;
            right: 72px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .side-nav {
                transform: translateX(-240px);
            }
            .side-nav.open {
                transform: translateX(0);
            }
            .page-wrap {
                margin-left: 0;
                padding-top: 56px;
            }
            .mobile-header {
                display: flex;
            }
            .drawer-mask.show {
                display: block;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-banner {
                min-height: 280px;
                padding: 50px 0 40px;
            }
            .category-banner .banner-desc {
                font-size: 15px;
            }
            .intro-box {
                padding: 24px;
            }
            .cta-box {
                padding: 36px 20px;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-buttons .btn {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 4px;
            }
            .float-cta {
                width: 48px;
                height: 48px;
                right: 18px;
                bottom: 24px;
                font-size: 18px;
            }
            .float-cta .float-bubble {
                display: none;
            }
            .card-body {
                padding: 18px;
            }
            .faq-section .accordion-content {
                padding: 16px 18px 18px 36px;
            }
        }
        @media (max-width: 400px) {
            .logo-text {
                font-size: 15px;
            }
            .footer-bottom {
                font-size: 11px;
            }
        }

        @media print {
            .side-nav,
            .mobile-header,
            .float-cta {
                display: none !important;
            }
            .page-wrap {
                margin-left: 0 !important;
            }
        }