/* roulang page: index */
:root{
  --c-bg:#F4F6F2;--c-surface:#FFFFFF;--c-surface-2:#EDF2E9;
  --c-ink:#0E1A15;--c-ink-2:#4A5A52;--c-line:#DCE4DA;
  --c-brand:#0F3D2E;--c-brand-2:#1F8A63;
  --c-accent:#C6F24E;--c-accent-ink:#16321A;
  --c-hot:#FF6B35;
  --c-dark:#0B1712;--c-dark-ink:#E8F0E6;--c-dark-line:rgba(232,240,230,.14);
  --r-sm:10px;--r-md:14px;--r-lg:18px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(11,23,18,.06),0 2px 8px rgba(11,23,18,.05);
  --sh-2:0 6px 20px rgba(11,23,18,.08);
  --sh-3:0 16px 40px rgba(11,23,18,.12);
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--c-bg);color:var(--c-ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-brand-2);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--c-brand)}
button{font:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:.01em}
p{margin:0}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-alt{background:var(--c-surface)}
.section-line{border-top:1px solid var(--c-line)}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--c-brand-2);text-transform:uppercase;margin-bottom:10px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-head h2{font-size:clamp(22px,2.6vw,32px)}
.section-head p{color:var(--c-ink-2);font-size:15px;max-width:640px;margin-top:10px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-brand)}
.text-link .arrow{transition:transform .2s var(--ease)}
.text-link:hover .arrow{transform:translateX(4px)}

/* ------- 公告条 ------- */
.notice-bar{background:var(--c-dark);color:var(--c-accent);font-size:13.5px}
.notice-inner{display:flex;align-items:center;justify-content:center;gap:14px;min-height:38px;padding:4px 0;position:relative}
.notice-inner p{margin:0;text-align:center}
.notice-close{position:absolute;right:0;top:50%;transform:translateY(-50%);width:28px;height:28px;display:grid;place-items:center;border:0;background:transparent;color:var(--c-accent);border-radius:50%}
.notice-close:hover{background:rgba(198,242,78,.16)}
.notice-bar.is-hidden{display:none}

/* ------- 头部导航 ------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--c-line);transition:box-shadow .25s var(--ease)}
.site-header.is-compact{box-shadow:var(--sh-2)}
.header-inner{display:flex;align-items:center;gap:28px;height:72px;transition:height .25s var(--ease)}
.site-header.is-compact .header-inner{height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:38px;height:38px;border-radius:12px;background:var(--c-brand);display:grid;place-items:center;flex-shrink:0}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:800;color:var(--c-brand);letter-spacing:.02em}
.brand-text small{font-size:11px;color:var(--c-ink-2);letter-spacing:.18em}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:12px}
.nav-link{position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;font-size:15px;font-weight:600;color:var(--c-ink);border-radius:var(--r-sm)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--c-accent);transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease)}
.nav-link:hover{color:var(--c-brand);background:var(--c-surface-2)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-brand)}
.nav-link.is-active::after{transform:scaleX(1)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--r-sm);font-size:15px;font-weight:700;border:1.5px solid transparent;transition:all .22s var(--ease);white-space:nowrap}
.btn-primary{background:var(--c-accent);color:var(--c-accent-ink);border-color:var(--c-accent)}
.btn-primary:hover{filter:brightness(.95);transform:translateY(-1px);box-shadow:var(--sh-2);color:var(--c-accent-ink)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff}
.btn-outline{background:transparent;color:var(--c-brand);border-color:var(--c-brand)}
.btn-outline:hover{background:rgba(15,61,46,.08);color:var(--c-brand)}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:var(--r-sm)}
.btn-dark{background:var(--c-brand);color:#fff;border-color:var(--c-brand)}
.btn-dark:hover{background:#0c3125;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--c-line);background:#fff;border-radius:var(--r-sm);align-items:center;justify-content:center}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-brand);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-brand)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-mask{display:none;position:fixed;inset:0;background:rgba(11,23,18,.42);z-index:70}
.nav-mask.is-open{display:block}

/* ------- Hero ------- */
.hero{position:relative;overflow:hidden;background:var(--c-brand);color:#fff}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.55}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(11,23,18,.94) 0%,rgba(11,23,18,.78) 46%,rgba(11,23,18,.42) 100%)}
.hero-inner{position:relative;display:grid;grid-template-columns:6fr 5fr;gap:48px;align-items:center;padding:84px 24px 76px}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);background:rgba(198,242,78,.16);color:var(--c-accent);font-size:13px;font-weight:600;border:1px solid rgba(198,242,78,.3)}
.hero h1{margin:20px 0 0;font-size:clamp(28px,4.2vw,48px);font-weight:800;line-height:1.25;letter-spacing:.005em;color:#fff}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.85;color:rgba(232,240,230,.86);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-points{display:flex;flex-wrap:wrap;gap:22px;margin-top:34px}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(232,240,230,.82)}
.hero-points svg{width:16px;height:16px;flex-shrink:0}
.hero-panel{background:rgba(255,255,255,.97);border-radius:var(--r-lg);box-shadow:var(--sh-3);overflow:hidden;color:var(--c-ink)}
.hero-panel-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2)}
.hero-panel-cover img{width:100%;height:100%;object-fit:cover}
.corner-badge{position:absolute;top:14px;left:14px;padding:5px 12px;border-radius:var(--r-pill);background:var(--c-accent);color:var(--c-accent-ink);font-size:12px;font-weight:700}
.hero-panel-body{padding:22px 24px 26px}
.hero-panel-body h3{font-size:19px;margin-bottom:10px}
.hero-panel-body p{font-size:14.5px;color:var(--c-ink-2);line-height:1.8}
.hero-panel-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid var(--c-line);font-size:13.5px;color:var(--c-ink-2)}
.status-dot{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--c-brand-2)}
.status-dot i{width:8px;height:8px;border-radius:50%;background:var(--c-brand-2);display:block}
.hero-panel .btn{width:100%;margin-top:18px}

/* ------- 卡片网格 ------- */
.grid-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.card-cover{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.card:hover .card-cover img{transform:scale(1.04)}
.card-body{padding:20px 20px 22px}
.card-body h3{font-size:17px;font-weight:600;line-height:1.5}
.card-body h3 a{color:var(--c-ink)}
.card-body h3 a:hover{color:var(--c-brand-2)}
.card-body p{margin-top:10px;font-size:14px;color:var(--c-ink-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:13.5px;font-weight:600;color:var(--c-brand-2)}
.card-foot .arrow{transition:transform .2s var(--ease)}
.card:hover .card-foot .arrow{transform:translateX(3px)}
.badge{display:inline-flex;align-items:center;padding:4px 11px;border-radius:var(--r-pill);background:rgba(31,138,99,.12);color:var(--c-brand);font-size:12px;font-weight:600}
.badge-hot{background:rgba(255,107,53,.14);color:#C24A1C}
.badge-soft{background:var(--c-surface-2);color:var(--c-ink-2)}

/* ------- 最新信息 ------- */
.news-layout{display:grid;grid-template-columns:7fr 5fr;gap:28px;align-items:start}
.news-lead{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow .3s var(--ease)}
.news-lead:hover{box-shadow:var(--sh-2)}
.news-lead-cover{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2)}
.news-lead-cover img{width:100%;height:100%;object-fit:cover}
.news-lead-body{padding:24px 26px 28px}
.news-lead-body h3{margin-top:12px;font-size:22px;line-height:1.45}
.news-lead-body h3 a{color:var(--c-ink)}
.news-lead-body h3 a:hover{color:var(--c-brand-2)}
.news-lead-body p{margin-top:12px;font-size:15px;color:var(--c-ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-lead-body time{display:block;margin-top:16px;font-size:13.5px;color:var(--c-ink-2);font-variant-numeric:tabular-nums}
.news-list{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1)}
.news-list li+li{border-top:1px solid var(--c-line)}
.news-list a{display:block;padding:16px 22px;transition:background .2s var(--ease)}
.news-list a:hover{background:var(--c-surface-2)}
.news-item-title{display:block;margin-top:8px;font-size:15.5px;font-weight:600;color:var(--c-ink);line-height:1.6;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-list time{display:block;margin-top:6px;font-size:13px;color:var(--c-ink-2);font-variant-numeric:tabular-nums}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;min-height:220px;background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-lg);text-align:center;padding:32px}
.empty-state svg{width:44px;height:44px;color:var(--c-brand-2);opacity:.7}
.empty-state p{color:var(--c-ink-2);font-size:15px}

/* ------- 评价轮播 ------- */
.reviews{background:var(--c-surface-2)}
.review-wrap{position:relative}
.review-track{display:flex;gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 4px 20px;scrollbar-width:none}
.review-track::-webkit-scrollbar{display:none}
.review-card{flex:0 0 calc((100% - 44px)/3);scroll-snap-align:start;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1)}
.review-head{display:flex;align-items:center;gap:12px}
.avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(140deg,var(--c-brand),var(--c-brand-2));display:grid;place-items:center;color:#fff;font-weight:700;font-size:15px;flex-shrink:0}
.review-head strong{display:block;font-size:15px}
.review-head span{display:block;font-size:12.5px;color:var(--c-ink-2)}
.stars{display:flex;gap:3px;margin-top:14px}
.stars svg{width:15px;height:15px;color:#E8B21E}
.review-card p{margin-top:12px;font-size:14.5px;color:var(--c-ink-2);line-height:1.85}
.review-source{display:inline-block;margin-top:16px;font-size:12.5px;color:var(--c-brand-2);background:rgba(31,138,99,.1);padding:3px 10px;border-radius:var(--r-pill)}
.review-nav{display:flex;gap:10px;justify-content:flex-end;margin-top:4px}
.review-nav button{width:44px;height:44px;border-radius:50%;border:1px solid var(--c-line);background:#fff;color:var(--c-brand);display:grid;place-items:center;transition:all .2s var(--ease)}
.review-nav button:hover{background:var(--c-brand);color:#fff;border-color:var(--c-brand)}

/* ------- 保障条 ------- */
.assure{background:var(--c-dark);color:var(--c-dark-ink)}
.assure-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.assure-item{padding:0 26px;border-left:1px solid var(--c-dark-line)}
.assure-item:first-child{border-left:0;padding-left:0}
.assure-item svg{width:26px;height:26px;color:var(--c-accent)}
.assure-item h3{margin-top:16px;font-size:16px;color:#fff;font-weight:600}
.assure-item p{margin-top:8px;font-size:13.5px;line-height:1.8;color:rgba(232,240,230,.72)}

/* ------- CTA ------- */
.cta-band{background:linear-gradient(115deg,#0B1712 0%,#0F3D2E 62%,#14503C 100%);color:#fff;border-radius:24px;padding:52px 56px;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;box-shadow:var(--sh-3)}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);color:#fff}
.cta-band p{margin-top:12px;font-size:15px;color:rgba(232,240,230,.82);max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ------- FAQ ------- */
.faq-list{max-width:900px;margin:0 auto;border-top:1px solid var(--c-line)}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 4px;font-size:16px;font-weight:600;cursor:pointer;list-style:none;transition:color .2s var(--ease)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-brand-2)}
.faq-item summary .chev{width:20px;height:20px;flex-shrink:0;color:var(--c-brand-2);transition:transform .2s var(--ease)}
.faq-item[open] summary .chev{transform:rotate(180deg)}
.faq-item .faq-body{padding:0 4px 24px;font-size:15px;color:var(--c-ink-2);line-height:1.85}

/* ------- 页脚 ------- */
.site-footer{background:var(--c-dark);color:rgba(232,240,230,.72);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:48px}
.footer-brand .brand-mark{background:var(--c-accent)}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text small{color:rgba(232,240,230,.6)}
.footer-brand p{margin-top:18px;font-size:13.5px;line-height:1.85;max-width:300px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col li+li{margin-top:10px}
.footer-col a{font-size:13.5px;color:rgba(232,240,230,.72)}
.footer-col a:hover{color:var(--c-accent)}
.footer-contact li{font-size:13.5px;line-height:1.8}
.footer-bottom{border-top:1px solid var(--c-dark-line);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:rgba(232,240,230,.55)}
.footer-bottom a{color:rgba(232,240,230,.55)}
.footer-bottom a:hover{color:var(--c-accent)}

/* ------- 响应式 ------- */
@media (max-width:1279px){
  .grid-cards{grid-template-columns:repeat(3,1fr)}
  .review-card{flex:0 0 calc((100% - 44px)/3)}
}
@media (max-width:1199px){
  .section{padding:72px 0}
}
@media (max-width:1023px){
  .header-inner{height:64px}
  .nav-toggle{display:inline-flex}
  .nav-menu{
    position:fixed;top:0;right:0;height:100vh;width:86vw;max-width:360px;
    background:#fff;flex-direction:column;align-items:stretch;gap:4px;
    padding:84px 20px 28px;margin-left:0;
    transform:translateX(100%);transition:transform .25s var(--ease);
    box-shadow:var(--sh-3);z-index:85;overflow-y:auto;
  }
  .nav-menu.is-open{transform:translateX(0)}
  .nav-link{height:48px;padding:0 14px;font-size:15.5px}
  .nav-link::after{left:14px;right:auto;width:24px;bottom:8px}
  .header-actions .btn-dark{display:none}
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:64px 24px 60px}
  .hero-sub{max-width:none}
  .news-layout{grid-template-columns:1fr}
  .review-card{flex:0 0 calc((100% - 22px)/2)}
  .assure-grid{grid-template-columns:repeat(2,1fr);gap:32px 0}
  .assure-item:nth-child(3){border-left:0;padding-left:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:40px 32px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .grid-cards{grid-template-columns:repeat(2,1fr);gap:18px}
  .review-card{flex:0 0 88%}
  .cta-band{border-radius:18px;padding:32px 24px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .hero-panel-body{padding:20px}
}
@media (max-width:560px){
  .container{padding:0 18px}
  body{font-size:15.5px}
  .grid-cards{grid-template-columns:1fr}
  .assure-grid{grid-template-columns:1fr;gap:28px}
  .assure-item{border-left:0;padding-left:0}
  .assure-item+.assure-item{border-top:1px solid var(--c-dark-line);padding-top:28px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .hero-inner{padding:52px 18px 48px}
  .brand-text strong{font-size:16px}
}

/* roulang page: article */
:root{
  --c-bg:#F4F6F2;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2E9;
  --c-ink:#0E1A15;
  --c-ink-2:#4A5A52;
  --c-line:#DCE4DA;
  --c-brand:#0F3D2E;
  --c-brand-2:#1F8A63;
  --c-accent:#C6F24E;
  --c-accent-ink:#16321A;
  --c-hot:#FF6B35;
  --c-dark:#0B1712;
  --c-dark-ink:#E8F0E6;
  --c-dark-line:rgba(232,240,230,.14);
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,23,18,.06),0 2px 8px rgba(11,23,18,.05);
  --sh-2:0 6px 20px rgba(11,23,18,.08);
  --sh-3:0 16px 40px rgba(11,23,18,.12);
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--sp-9:96px;
  --font:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --tr:300ms cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-brand-2);text-decoration:none;transition:color 200ms ease;}
a:hover{color:var(--c-brand);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding-left:0;list-style:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--tr),background 200ms ease;
}
.site-header.is-compact{box-shadow:var(--sh-2);}
.header-inner{
  display:flex;align-items:center;gap:24px;
  height:72px;transition:height 200ms ease;
}
.site-header.is-compact .header-inner{height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:grid;place-items:center;flex:0 0 auto;
  background:var(--c-accent);
}
.site-header .brand-mark{background:var(--c-brand);}
.brand-mark svg{width:20px;height:20px;display:block;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--c-brand);}
.brand-text small{font-size:11px;letter-spacing:.22em;color:var(--c-ink-2);}
.nav-menu{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;font-size:15px;font-weight:600;color:var(--c-ink-2);
  padding:8px 2px;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:2px;height:2px;width:0;
  background:var(--c-accent);border-radius:2px;transition:width 200ms ease;
}
.nav-link:hover{color:var(--c-brand);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--c-brand);}
.nav-link.is-active::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--c-line);position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  width:18px;height:2px;background:var(--c-brand);border-radius:2px;
  transition:transform 200ms ease,opacity 200ms ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;letter-spacing:.02em;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform 200ms ease,box-shadow var(--tr),background 200ms ease,color 200ms ease,border-color 200ms ease;
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-lg{height:54px;padding:0 32px;font-size:16px;}
.btn-dark{background:var(--c-accent);color:var(--c-accent-ink);}
.btn-dark:hover{filter:brightness(.96);transform:translateY(-1px);box-shadow:var(--sh-2);color:var(--c-accent-ink);}
.btn-primary{background:var(--c-brand);color:#fff;}
.btn-primary:hover{background:#0c3025;transform:translateY(-1px);box-shadow:var(--sh-2);color:#fff;}
.btn-outline{border-color:var(--c-brand);color:var(--c-brand);background:transparent;}
.btn-outline:hover{background:rgba(15,61,46,.08);color:var(--c-brand);}
.btn-outline-light{border-color:rgba(232,240,230,.45);color:var(--c-dark-ink);background:transparent;}
.btn-outline-light:hover{background:rgba(232,240,230,.12);color:#fff;}
.btn:active{transform:translateY(1px);}
.btn:disabled{opacity:.45;cursor:not-allowed;}

/* ---------- Badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:700;letter-spacing:.04em;
  background:var(--c-surface-2);color:var(--c-brand);
}
.badge-hot{background:rgba(255,107,53,.12);color:#B8410F;}
.badge-dark{background:rgba(198,242,78,.16);color:var(--c-accent);}

/* ---------- Article Hero ---------- */
.article-hero{
  position:relative;
  padding:64px 0 56px;
  color:#fff;
  background-image:linear-gradient(120deg,rgba(11,23,18,.9),rgba(15,61,46,.7)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.article-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:6px;
  background:linear-gradient(90deg,var(--c-accent) 0 34%,rgba(198,242,78,.18) 34% 100%);
}
.breadcrumb{font-size:13px;color:rgba(232,240,230,.72);margin-bottom:20px;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;max-width:100%;}
.breadcrumb li+li::before{content:"/";color:rgba(232,240,230,.4);}
.breadcrumb a{color:rgba(232,240,230,.86);}
.breadcrumb a:hover{color:var(--c-accent);}
.breadcrumb .crumb-now{color:rgba(232,240,230,.62);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:340px;}
.article-title{
  font-size:clamp(26px,4vw,44px);line-height:1.28;font-weight:800;
  color:#fff;max-width:900px;letter-spacing:.01em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:22px;font-size:13.5px;color:rgba(232,240,230,.78);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(232,240,230,.45);}
.article-meta time{font-variant-numeric:tabular-nums;}

/* ---------- Article Layout ---------- */
.article-main{padding:64px 0 88px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;}
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,760px) 300px;gap:56px;justify-content:center;align-items:start;}
}
.article-figure{margin-bottom:36px;}
.article-figure .fig-box{
  aspect-ratio:16/9;border-radius:var(--r-lg);overflow:hidden;background:var(--c-surface-2);
  border:1px solid var(--c-line);box-shadow:var(--sh-1);
}
.article-figure img{width:100%;height:100%;object-fit:cover;}
.article-figure figcaption{
  margin-top:12px;text-align:center;font-size:13px;color:var(--c-ink-2);
}
.article-content{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:40px 44px;
}
.article-content>*:first-child{margin-top:0;}
.article-content p{font-size:16px;line-height:1.9;margin:0 0 1.15em;color:var(--c-ink);}
.article-content h2{
  position:relative;font-size:clamp(22px,2.4vw,24px);line-height:1.4;font-weight:700;
  margin:44px 0 18px;padding-left:16px;color:var(--c-brand);
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.28em;width:4px;height:1.05em;
  border-radius:2px;background:var(--c-accent);
}
.article-content h3{font-size:19px;line-height:1.5;font-weight:600;margin:32px 0 14px;color:var(--c-ink);}
.article-content h4{font-size:17px;font-weight:600;margin:24px 0 10px;color:var(--c-ink);}
.article-content ul,.article-content ol{margin:0 0 1.2em;padding-left:1.4em;font-size:16px;line-height:1.9;}
.article-content ul li{list-style:none;position:relative;padding-left:6px;margin-bottom:8px;}
.article-content ul li::before{
  content:"";position:absolute;left:-1.1em;top:.72em;width:7px;height:7px;border-radius:2px;
  background:var(--c-accent);transform:rotate(45deg);
}
.article-content ol{list-style:decimal;padding-left:1.5em;}
.article-content ol li{margin-bottom:8px;}
.article-content ol li::marker{color:var(--c-brand-2);font-weight:700;}
.article-content blockquote{
  margin:24px 0;padding:16px 20px;background:var(--c-surface-2);
  border-left:3px solid var(--c-brand);border-radius:0 var(--r-md) var(--r-md) 0;
  font-style:normal;color:var(--c-ink-2);
}
.article-content img{border-radius:12px;margin:22px auto;box-shadow:var(--sh-1);}
.article-content figure{margin:24px 0;}
.article-content figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--c-ink-2);}
.article-content a{color:var(--c-brand-2);text-decoration:underline;text-underline-offset:3px;}
.article-content a:hover{color:var(--c-brand);}
.article-content table{font-size:14.5px;margin:22px 0;border-radius:var(--r-md);overflow:hidden;}
.article-content th{
  background:var(--c-surface-2);color:var(--c-brand);font-weight:700;
  text-align:left;padding:12px 14px;border-bottom:1px solid var(--c-line);
}
.article-content td{padding:12px 14px;border-bottom:1px solid var(--c-line);color:var(--c-ink-2);}
.article-content tr:nth-child(even) td{background:rgba(237,242,233,.5);}
.article-content code{
  font-family:"SFMono-Regular",Consolas,Menlo,monospace;font-size:14px;
  background:var(--c-surface-2);padding:2px 6px;border-radius:6px;color:var(--c-brand);
}
.article-content pre{
  background:var(--c-dark);color:var(--c-dark-ink);padding:18px 20px;border-radius:var(--r-md);
  overflow-x:auto;font-size:14px;line-height:1.7;margin:22px 0;
}
.article-content pre code{background:none;color:inherit;padding:0;}
.article-content hr{border:0;border-top:1px solid var(--c-line);margin:36px 0;}
.article-content strong{font-weight:700;color:var(--c-brand);}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}

/* ---------- Empty state ---------- */
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;padding:40px 24px;
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-lg);
}
.empty-state .empty-ico{
  width:56px;height:56px;border-radius:50%;display:grid;place-items:center;
  background:var(--c-surface-2);
}
.empty-state .empty-ico svg{width:26px;height:26px;stroke:var(--c-brand-2);fill:none;stroke-width:1.8;}
.empty-state h2{font-size:20px;font-weight:700;}
.empty-state p{font-size:14.5px;color:var(--c-ink-2);max-width:420px;}

/* ---------- Tags & share ---------- */
.article-foot{margin-top:32px;display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--c-surface);border:1px solid var(--c-line);
  font-size:13px;font-weight:600;color:var(--c-ink-2);
  transition:border-color 200ms ease,color 200ms ease,background 200ms ease;
}
.tag:hover{border-color:var(--c-brand-2);color:var(--c-brand-2);background:var(--c-surface-2);}
.share-row{display:flex;gap:12px;align-items:center;}

/* ---------- Section blocks ---------- */
.section{padding:64px 0;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:28px;}
.section-head h2{font-size:clamp(21px,2.4vw,27px);font-weight:700;color:var(--c-brand);}
.section-head p{font-size:14px;color:var(--c-ink-2);margin-top:8px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:700;color:var(--c-brand-2);
}
.text-link svg{width:16px;height:16px;transition:transform 200ms ease;}
.text-link:hover svg{transform:translateX(3px);}

/* ---------- Related cards ---------- */
.card-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--tr),box-shadow var(--tr);
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.card-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform var(--tr);}
.card:hover .card-cover img{transform:scale(1.04);}
.card-cover .badge{position:absolute;left:12px;top:12px;}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17px;line-height:1.5;font-weight:700;color:var(--c-ink);}
.card-body h3 a{color:inherit;}
.card-body h3 a:hover{color:var(--c-brand-2);}
.card-body p{font-size:14px;line-height:1.75;color:var(--c-ink-2);}
.card-meta{font-size:13px;color:var(--c-ink-2);display:flex;gap:10px;align-items:center;margin-top:auto;font-variant-numeric:tabular-nums;}

/* ---------- Prev / Next ---------- */
.pager{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.pager-item{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:20px 22px;box-shadow:var(--sh-1);transition:transform var(--tr),box-shadow var(--tr),border-color 200ms ease;
}
.pager-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C7D8C6;}
.pager-item .pager-label{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--c-brand-2);margin-bottom:6px;display:block;}
.pager-item strong{font-size:15.5px;line-height:1.55;color:var(--c-ink);font-weight:700;}
.pager-item .pager-ico{
  width:40px;height:40px;border-radius:12px;flex:0 0 auto;display:grid;place-items:center;
  background:var(--c-surface-2);
}
.pager-item .pager-ico svg{width:18px;height:18px;stroke:var(--c-brand);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;
}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--c-ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";width:10px;height:10px;flex:0 0 auto;
  border-right:2px solid var(--c-brand-2);border-bottom:2px solid var(--c-brand-2);
  transform:rotate(45deg);transition:transform 200ms ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg);}
.faq-item .faq-answer{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--c-ink-2);}
.faq-item[open] .faq-answer{animation:fadeIn 200ms ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ---------- Sidebar ---------- */
.article-aside{display:flex;flex-direction:column;gap:20px;}
@media (min-width:1200px){.article-aside{position:sticky;top:100px;}}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:22px;box-shadow:var(--sh-1);
}
.side-card h3{font-size:15px;font-weight:700;color:var(--c-brand);margin-bottom:14px;letter-spacing:.02em;}
.side-list{display:flex;flex-direction:column;}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 0;border-bottom:1px solid var(--c-line);
  font-size:14.5px;color:var(--c-ink-2);transition:color 200ms ease,padding-left 200ms ease;
}
.side-list a:last-child{border-bottom:0;}
.side-list a:hover{color:var(--c-brand-2);padding-left:4px;}
.side-list a span{font-size:12px;color:#93A79A;}
.side-card.side-cta{background:var(--c-brand);border-color:var(--c-brand);color:var(--c-dark-ink);}
.side-card.side-cta h3{color:#fff;}
.side-card.side-cta p{font-size:14px;line-height:1.8;color:rgba(232,240,230,.78);margin-bottom:16px;}
.side-card.side-cta .btn{width:100%;}

/* ---------- CTA band ---------- */
.cta-band{background:var(--c-dark);color:var(--c-dark-ink);padding:64px 0;}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;}
.cta-inner h2{font-size:clamp(21px,2.6vw,30px);font-weight:700;color:#fff;line-height:1.4;}
.cta-inner p{margin-top:12px;font-size:15px;line-height:1.85;color:rgba(232,240,230,.76);max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-dark);color:var(--c-dark-ink);padding:72px 0 0;border-top:1px solid var(--c-dark-line);}
.footer-grid{
  display:grid;grid-template-columns:1.4fr repeat(3,1fr) 1.1fr;gap:40px;
  padding-bottom:48px;border-bottom:1px solid var(--c-dark-line);
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text small{color:rgba(232,240,230,.55);}
.footer-brand p{font-size:13.5px;line-height:1.9;color:rgba(232,240,230,.7);max-width:320px;}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:13.5px;color:rgba(232,240,230,.68);}
.footer-col a:hover{color:var(--c-accent);}
.footer-contact li{font-size:13.5px;color:rgba(232,240,230,.68);line-height:1.8;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  padding:22px 0 28px;font-size:13px;color:rgba(232,240,230,.55);
}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .section{padding:72px 0;}
}
@media (max-width:1023px){
  .section{padding:64px 0;}
  .nav-toggle{display:block;}
  .nav-menu{
    position:fixed;top:0;right:0;bottom:0;width:86vw;max-width:360px;
    background:var(--c-surface);flex-direction:column;align-items:stretch;gap:0;
    padding:88px 22px 28px;margin-left:0;
    box-shadow:var(--sh-3);transform:translateX(102%);
    transition:transform 200ms ease;overflow-y:auto;z-index:130;
  }
  .nav-menu.is-open{transform:translateX(0);}
  .nav-link{
    font-size:16px;padding:16px 4px;border-bottom:1px solid var(--c-line);
  }
  .nav-link::after{display:none;}
  .nav-link.is-active{color:var(--c-brand);}
  body.nav-open{overflow:hidden;}
  .card-grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .article-main{padding:40px 0 64px;}
  .article-hero{padding:44px 0 40px;}
  .article-content{padding:26px 20px;}
  .article-layout{gap:32px;}
  .pager{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .breadcrumb .crumb-now{max-width:200px;}
}
@media (max-width:560px){
  .container{padding:0 18px;}
  body{font-size:15.5px;}
  .card-grid-3{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .article-title{font-size:25px;}
  .cta-actions .btn{width:100%;}
  .btn{padding:0 20px;}
}

/* roulang page: category1 */
:root{
  --c-bg:#F4F6F2;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2E9;
  --c-ink:#0E1A15;
  --c-ink-2:#4A5A52;
  --c-line:#DCE4DA;
  --c-brand:#0F3D2E;
  --c-brand-2:#1F8A63;
  --c-accent:#C6F24E;
  --c-accent-ink:#16321A;
  --c-hot:#FF6B35;
  --c-dark:#0B1712;
  --c-dark-ink:#E8F0E6;
  --c-dark-line:rgba(232,240,230,.14);
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,23,18,.06),0 2px 8px rgba(11,23,18,.05);
  --sh-2:0 6px 20px rgba(11,23,18,.08);
  --sh-3:0 16px 40px rgba(11,23,18,.12);
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-brand-2);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--c-brand);}
button{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1{font-size:clamp(28px,4.2vw,48px);line-height:1.25;font-weight:800;letter-spacing:.01em;}
h2{font-size:clamp(22px,2.6vw,32px);line-height:1.35;font-weight:700;}
h3{font-size:19px;line-height:1.45;font-weight:600;}
h4{font-size:17px;line-height:1.5;font-weight:600;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--c-brand-2);outline-offset:2px;border-radius:8px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s var(--ease),height .25s var(--ease);
}
.site-header.is-compact{box-shadow:var(--sh-2);}
.header-inner{display:flex;align-items:center;gap:20px;height:72px;transition:height .25s var(--ease);}
.site-header.is-compact .header-inner{height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;}
.brand-mark{width:36px;height:36px;border-radius:11px;background:var(--c-accent);display:grid;place-items:center;flex:0 0 auto;}
.brand-mark svg{width:20px;height:20px;}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text strong{font-size:17px;font-weight:800;color:var(--c-brand);letter-spacing:.01em;}
.brand-text small{font-size:11px;letter-spacing:.2em;color:var(--c-ink-2);}
.nav-menu{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 12px;font-size:15px;font-weight:600;color:#2F4038;
  border-radius:8px;text-decoration:none;transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--c-accent);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--c-brand);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-brand);}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--c-line);background:#fff;cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;background:var(--c-brand);
  transform:translateX(-50%);transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;left:0;transform:none;}
.nav-toggle span::after{top:6px;left:0;transform:none;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;border:1.5px solid transparent;
  cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-accent{background:var(--c-accent);color:var(--c-accent-ink);}
.btn-accent:hover{filter:brightness(.96);transform:translateY(-1px);box-shadow:var(--sh-2);color:var(--c-accent-ink);}
.btn-dark{background:var(--c-brand);color:#fff;}
.btn-dark:hover{background:#0B2E22;transform:translateY(-1px);box-shadow:var(--sh-2);color:#fff;}
.btn-outline{border-color:var(--c-brand);color:var(--c-brand);background:transparent;}
.btn-outline:hover{background:rgba(15,61,46,.08);color:var(--c-brand);transform:translateY(-1px);}
.btn-ghost-light{border-color:rgba(232,240,230,.5);color:var(--c-dark-ink);background:transparent;}
.btn-ghost-light:hover{background:rgba(232,240,230,.12);color:#fff;transform:translateY(-1px);}
.btn:active{transform:translateY(1px);box-shadow:none;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- breadcrumb ---------- */
.breadcrumb{margin-bottom:20px;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(232,240,230,.72);}
.breadcrumb li{display:inline-flex;align-items:center;}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:rgba(232,240,230,.45);}
.breadcrumb a{color:rgba(232,240,230,.86);}
.breadcrumb a:hover{color:var(--c-accent);}
.breadcrumb [aria-current="page"]{color:var(--c-accent);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;color:#fff;overflow:hidden;
  background-image:linear-gradient(105deg,rgba(11,23,18,.9) 0%,rgba(15,61,46,.68) 58%,rgba(15,61,46,.42) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
}
.page-hero-inner{position:relative;padding:76px 0 68px;max-width:1200px;}
.page-hero h1{max-width:900px;color:#fff;}
.page-hero-lead{max-width:760px;margin-top:18px;font-size:17px;line-height:1.8;color:rgba(232,240,230,.86);}
.hero-points{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-points li{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:var(--r-pill);
  font-size:13.5px;font-weight:600;color:var(--c-dark-ink);
  background:rgba(232,240,230,.12);border:1px solid rgba(232,240,230,.22);
}
.hero-points li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--c-accent);}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section-alt{background:var(--c-surface);}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;}
.section-head .section-sub{max-width:640px;margin-top:12px;color:var(--c-ink-2);font-size:15.5px;line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
  font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--c-brand-2);
}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--c-accent);}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--c-brand-2);}
.link-more svg{width:16px;height:16px;transition:transform .2s var(--ease);}
.link-more:hover svg{transform:translateX(3px);}

/* ---------- card grid ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:26px 24px 22px;box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#CBD8C9;}
.card-icon{
  width:48px;height:48px;border-radius:var(--r-md);background:var(--c-surface-2);
  display:grid;place-items:center;margin-bottom:18px;
}
.card-icon svg{width:24px;height:24px;stroke:var(--c-brand);}
.card h3{margin-bottom:10px;}
.card p{color:var(--c-ink-2);font-size:15px;line-height:1.8;}
.card-foot{margin-top:20px;padding-top:16px;border-top:1px solid var(--c-line);}
.card-foot a{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-brand-2);}
.card-foot a svg{width:15px;height:15px;transition:transform .2s var(--ease);}
.card-foot a:hover svg{transform:translateX(3px);}

/* ---------- split block ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.split-media{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);background:var(--c-surface-2);}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.split-media figcaption{font-size:13px;color:var(--c-ink-2);text-align:center;padding:10px 14px;}
.steps{margin-top:26px;display:grid;gap:18px;}
.steps li{display:flex;gap:16px;align-items:flex-start;}
.step-num{
  flex:0 0 auto;width:32px;height:32px;border-radius:50%;
  background:var(--c-accent);color:var(--c-accent-ink);
  display:grid;place-items:center;font-size:14px;font-weight:800;
}
.steps h3{font-size:17px;margin-bottom:4px;}
.steps p{color:var(--c-ink-2);font-size:15px;line-height:1.8;}

/* ---------- dark check band ---------- */
.check-band{background:var(--c-dark);color:var(--c-dark-ink);padding:80px 0;}
.check-band h2{color:#fff;}
.check-band .section-sub{color:rgba(232,240,230,.72);max-width:680px;margin-top:12px;font-size:15.5px;line-height:1.8;}
.check-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:44px;}
.check-item{border-top:2px solid var(--c-accent);padding-top:18px;}
.check-item h3{color:#fff;font-size:17px;margin-bottom:8px;}
.check-item p{color:rgba(232,240,230,.72);font-size:14px;line-height:1.75;}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-1);
  transition:box-shadow .25s var(--ease);
}
.faq-item:hover{box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--c-ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";flex:0 0 auto;width:9px;height:9px;
  border-right:2px solid var(--c-brand);border-bottom:2px solid var(--c-brand);
  transform:rotate(45deg);transition:transform .2s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(-135deg);}
.faq-body{padding:0 22px 20px;color:var(--c-ink-2);font-size:15px;line-height:1.85;}
.faq-body p{max-width:760px;}

/* ---------- cta band ---------- */
.cta-band{background:linear-gradient(120deg,#0F3D2E 0%,#0B2A20 100%);color:#fff;padding:72px 0;}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px;}
.cta-inner h2{color:#fff;max-width:620px;}
.cta-inner p{margin-top:12px;color:rgba(232,240,230,.8);font-size:15.5px;line-height:1.8;max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{background:var(--c-dark);color:var(--c-dark-ink);}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1.15fr;
  gap:40px;padding:64px 0 40px;
}
.footer-brand .brand{margin-bottom:18px;}
.site-footer .brand-text strong{color:#fff;}
.site-footer .brand-text small{color:rgba(232,240,230,.62);}
.footer-brand p{color:rgba(232,240,230,.68);font-size:14px;line-height:1.85;max-width:340px;}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{color:rgba(232,240,230,.7);font-size:13.5px;}
.footer-col a:hover{color:var(--c-accent);}
.footer-contact li{color:rgba(232,240,230,.68);font-size:13.5px;line-height:1.75;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:22px 0 30px;border-top:1px solid var(--c-dark-line);
  font-size:13px;color:rgba(232,240,230,.55);
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .section{padding:72px 0;}
  .check-band{padding:68px 0;}
}
@media (max-width:1023px){
  .section{padding:64px 0;}
  .page-hero-inner{padding:64px 0 56px;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .check-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}
  .nav-toggle{display:inline-block;}
  .nav-menu{
    position:fixed;top:0;right:0;z-index:60;
    width:86vw;max-width:360px;height:100vh;
    flex-direction:column;align-items:stretch;gap:2px;
    margin-left:0;padding:92px 22px 32px;
    background:#fff;box-shadow:var(--sh-3);
    transform:translateX(100%);transition:transform .25s var(--ease);
    overflow-y:auto;
  }
  .nav-menu.is-open{transform:translateX(0);}
  .nav-link{width:100%;padding:14px 14px;font-size:16px;}
  .nav-link::after{display:none;}
  .nav-link.is-active{background:var(--c-surface-2);}
  .header-actions{margin-left:auto;}
  .split{grid-template-columns:1fr;gap:32px;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .page-hero-inner{padding:48px 0 44px;}
  .page-hero-lead{font-size:15.5px;}
  .check-band{padding:52px 0;}
  .cta-band{padding:52px 0;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .footer-grid{padding:48px 0 32px;}
}
@media (max-width:560px){
  .container{padding:0 18px;}
  body{font-size:15.5px;}
  .grid-3{grid-template-columns:1fr;}
  .check-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-points li{font-size:13px;}
  .btn{width:100%;}
  .cta-actions{width:100%;flex-direction:column;}
  .header-actions .btn-sm{width:auto;}
}

/* roulang page: category2 */
:root{
  --c-bg:#F4F6F2;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2E9;
  --c-ink:#0E1A15;
  --c-ink-2:#4A5A52;
  --c-line:#DCE4DA;
  --c-brand:#0F3D2E;
  --c-brand-2:#1F8A63;
  --c-accent:#C6F24E;
  --c-accent-ink:#16321A;
  --c-hot:#FF6B35;
  --c-dark:#0B1712;
  --c-dark-ink:#E8F0E6;
  --c-dark-line:rgba(232,240,230,.14);
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,23,18,.06),0 2px 8px rgba(11,23,18,.05);
  --sh-2:0 6px 20px rgba(11,23,18,.08);
  --sh-3:0 16px 40px rgba(11,23,18,.12);
  --font:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-brand-2);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-brand)}
h1,h2,h3,h4{margin:0;color:var(--c-ink);letter-spacing:.005em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;cursor:pointer;
  border:1.5px solid transparent;
  transition:transform .2s cubic-bezier(.2,.7,.2,1),box-shadow .2s ease,background-color .2s ease,color .2s ease,filter .2s ease;
}
.btn svg{flex:none}
.btn-sm{height:38px;padding:0 20px;font-size:14px}
.btn-primary{background:var(--c-accent);color:var(--c-accent-ink)}
.btn-primary:hover{filter:brightness(.96);transform:translateY(-1px);box-shadow:var(--sh-2);color:var(--c-accent-ink)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-dark{background:var(--c-brand);color:#fff}
.btn-dark:hover{background:#164E3B;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-dark:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--c-brand);color:var(--c-brand)}
.btn-ghost:hover{background:rgba(15,61,46,.08);color:var(--c-brand)}
.btn-outline-light{background:transparent;border-color:rgba(232,240,230,.5);color:#fff}
.btn-outline-light:hover{background:rgba(232,240,230,.12);border-color:var(--c-accent);color:var(--c-accent);transform:translateY(-1px)}
.btn-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--c-brand-2);background:none;border:0;padding:0;cursor:pointer;
}
.btn-link svg{transition:transform .22s ease}
.btn-link:hover{color:var(--c-brand)}
.btn-link:hover svg{transform:translateX(3px)}
.btn:disabled,.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--c-surface-2);color:var(--c-brand);
  font-size:12px;font-weight:600;line-height:1;letter-spacing:.02em;
}
.badge-solid{background:var(--c-brand);color:#fff}
.badge-accent{background:rgba(198,242,78,.5);color:var(--c-accent-ink)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-compact{box-shadow:var(--sh-2)}
.site-header.is-nav-open::after{
  content:"";position:fixed;inset:0;background:rgba(11,23,18,.45);z-index:60;pointer-events:none;
}
.header-inner{display:flex;align-items:center;gap:20px;height:72px;transition:height .25s ease}
.site-header.is-compact .header-inner{height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:34px;height:34px;border-radius:11px;background:var(--c-brand);
  display:inline-flex;align-items:center;justify-content:center;flex:none;
}
.brand-mark svg{width:19px;height:19px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:800;color:var(--c-ink);letter-spacing:.01em}
.brand-text small{font-size:11.5px;font-weight:600;color:var(--c-ink-2);letter-spacing:.14em}
.nav-menu{display:flex;align-items:center;gap:2px;margin:0 auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;
  border-radius:var(--r-sm);font-size:15px;font-weight:600;color:var(--c-ink-2);
  transition:color .2s ease,background-color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--c-accent);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-brand);background:var(--c-surface-2)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-brand)}
.nav-link.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);border-radius:12px;
  background:var(--c-surface);align-items:center;justify-content:center;cursor:pointer;padding:0;
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--c-brand);transition:background .2s ease}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--c-brand);
  transition:transform .2s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.is-nav-open .nav-toggle span{background:transparent}
.is-nav-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg)}
.is-nav-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- 分类页首屏 ---------- */
.category-hero{
  position:relative;color:#fff;
  background-image:linear-gradient(100deg,rgba(11,23,18,.92) 0%,rgba(15,61,46,.82) 58%,rgba(15,61,46,.66) 100%),
                   url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.category-hero .container{padding-top:64px;padding-bottom:64px;min-height:296px;display:flex;flex-direction:column;justify-content:center;gap:18px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(232,240,230,.7)}
.crumbs a{color:rgba(232,240,230,.82)}
.crumbs a:hover{color:var(--c-accent)}
.crumbs span.sep{opacity:.55}
.crumbs li{display:inline-flex;align-items:center;gap:8px}
.crumbs .current{color:#fff;font-weight:600}
.category-hero h1{
  color:#fff;font-size:clamp(28px,4.2vw,44px);line-height:1.25;font-weight:800;max-width:860px;
}
.hero-sub{font-size:clamp(16px,1.6vw,18px);line-height:1.8;color:rgba(232,240,230,.84);max-width:760px}
.hero-meta{display:flex;flex-wrap:wrap;gap:14px 28px;margin-top:6px;font-size:13px;color:rgba(232,240,230,.72)}
.hero-meta b{color:var(--c-accent);font-weight:600;margin-right:6px}
.hero-meta .num{font-variant-numeric:tabular-nums}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section-alt{background:var(--c-surface)}
.section-line{border-top:1px solid var(--c-line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.section-head .eyebrow{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-surface-2);color:var(--c-brand);font-size:12px;font-weight:600;margin-bottom:14px;
}
.section-head h2{font-size:clamp(22px,2.6vw,32px);line-height:1.35;font-weight:700}
.section-head p{margin-top:12px;color:var(--c-ink-2);max-width:640px;font-size:15.5px}
.section-head .head-link{flex:none}

/* ---------- 交错图文 ---------- */
.feature-list{display:flex;flex-direction:column;gap:72px}
.feature-row{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.feature-row.is-reverse .feature-media{order:2}
.feature-row.is-reverse .feature-body{order:1}
.feature-media{position:relative}
.feature-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid var(--c-line);box-shadow:var(--sh-2);
}
.feature-media::before{
  content:"";position:absolute;left:-14px;top:-14px;width:72px;height:72px;border-radius:16px;
  background:var(--c-accent);opacity:.35;z-index:-1;
}
.feature-body .badge{margin-bottom:16px}
.feature-body h3{font-size:clamp(20px,2.1vw,23px);line-height:1.45;font-weight:700;margin-bottom:14px}
.feature-body p{color:var(--c-ink-2);margin-bottom:18px}
.feature-points{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.feature-points li{position:relative;padding-left:20px;font-size:14.5px;color:var(--c-ink-2)}
.feature-points li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:3px;background:var(--c-accent);
}

/* ---------- 信息卡 ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.spec-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh-1);
  transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s ease;
}
.spec-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.spec-label{font-size:13px;font-weight:600;color:var(--c-ink-2);letter-spacing:.04em}
.spec-value{display:block;margin:10px 0 12px;font-size:24px;font-weight:800;color:var(--c-brand);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.spec-card p{font-size:14.5px;color:var(--c-ink-2)}
.spec-card .badge{margin-top:16px}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  overflow:hidden;transition:box-shadow .25s ease,border-color .25s ease;
}
.faq-item:hover{border-color:#C6D3C4}
.faq-item[open]{box-shadow:var(--sh-2)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--c-ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--c-surface-2)}
.faq-icon{flex:none;width:22px;height:22px;display:inline-flex;align-items:center;justify-content:center;transition:transform .25s ease}
.faq-item[open] .faq-icon{transform:rotate(180deg)}
.faq-body{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--c-ink-2)}

/* ---------- 保障条（深色） ---------- */
.assurance{background:var(--c-dark);color:var(--c-dark-ink);padding:64px 0}
.assurance-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.assurance-item{padding:0 28px;border-left:1px solid var(--c-dark-line)}
.assurance-item:first-child{border-left:0;padding-left:0}
.assurance-icon{
  width:46px;height:46px;border-radius:14px;background:rgba(198,242,78,.14);
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.assurance-item h3{font-size:17px;font-weight:700;color:#fff;margin-bottom:8px}
.assurance-item p{font-size:14px;line-height:1.8;color:rgba(232,240,230,.7)}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
  padding:48px 52px;border-radius:24px;color:#fff;
  background-image:linear-gradient(105deg,rgba(11,23,18,.95) 0%,rgba(15,61,46,.88) 100%),
                   url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
  box-shadow:var(--sh-3);
}
.cta-band h2{font-size:clamp(21px,2.3vw,28px);line-height:1.4;font-weight:700;color:#fff;max-width:620px}
.cta-band p{margin-top:12px;color:rgba(232,240,230,.82);font-size:15px;max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-dark);color:var(--c-dark-ink);padding:72px 0 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1.2fr;gap:32px}
.site-footer .brand-mark{background:var(--c-accent)}
.site-footer .brand-text strong{color:#fff}
.site-footer .brand-text small{color:rgba(232,240,230,.6)}
.footer-brand p{margin-top:18px;font-size:13.5px;line-height:1.85;color:rgba(232,240,230,.7);max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-contact li{font-size:13.5px;color:rgba(232,240,230,.72);line-height:1.7}
.footer-col a:hover{color:var(--c-accent)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:52px;padding-top:24px;border-top:1px solid var(--c-dark-line);
  font-size:13px;color:rgba(232,240,230,.6);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .section{padding:72px 0}
}
@media (max-width:1199px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px 28px}
}
@media (max-width:1023px){
  .section{padding:64px 0}
  .nav-toggle{display:inline-flex}
  .nav-menu{
    position:fixed;top:0;right:0;height:100vh;width:86vw;max-width:360px;
    background:var(--c-surface);flex-direction:column;align-items:stretch;gap:0;
    padding:96px 20px 32px;margin:0;z-index:70;overflow-y:auto;
    transform:translateX(103%);
    transition:transform .28s cubic-bezier(.2,.7,.2,1);
    box-shadow:-12px 0 40px rgba(11,23,18,.16);
  }
  .nav-menu.is-open{transform:translateX(0)}
  .nav-link{height:auto;padding:15px 6px;border-bottom:1px solid var(--c-line);border-radius:0;font-size:16px}
  .nav-link::after{display:none}
  .nav-link.is-active{background:var(--c-surface-2)}
  .feature-row{grid-template-columns:1fr;gap:28px}
  .feature-row.is-reverse .feature-media{order:0}
  .feature-row.is-reverse .feature-body{order:0}
  .feature-media::before{display:none}
  .feature-list{gap:56px}
  .assurance-grid{grid-template-columns:repeat(2,1fr);gap:36px 0}
  .assurance-item{border-left:0;padding:0}
  .assurance-item:nth-child(even){padding-left:28px;border-left:1px solid var(--c-dark-line)}
}
@media (max-width:900px){
  .spec-grid{grid-template-columns:1fr 1fr}
  .spec-grid .spec-card:last-child{grid-column:1 / -1}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .category-hero .container{padding-top:48px;padding-bottom:48px;min-height:0}
  .section-head{margin-bottom:30px}
  .cta-band{padding:36px 26px;border-radius:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:640px){
  .spec-grid{grid-template-columns:1fr}
  .spec-grid .spec-card:last-child{grid-column:auto}
  .brand-text small{letter-spacing:.1em}
}
@media (max-width:560px){
  .container{padding:0 18px}
  body{font-size:15.5px}
  .header-inner{height:64px;gap:12px}
  .site-header.is-compact .header-inner{height:58px}
  .header-actions .btn-dark{padding:0 14px;font-size:13.5px}
  .assurance{padding:48px 0}
  .assurance-grid{grid-template-columns:1fr;gap:32px}
  .assurance-item:nth-child(even){padding-left:0;border-left:0}
  .hero-meta{gap:10px 18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category3 */
:root{
  --c-bg:#F4F6F2;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2E9;
  --c-ink:#0E1A15;
  --c-ink-2:#4A5A52;
  --c-line:#DCE4DA;
  --c-brand:#0F3D2E;
  --c-brand-2:#1F8A63;
  --c-accent:#C6F24E;
  --c-accent-ink:#16321A;
  --c-hot:#FF6B35;
  --c-dark:#0B1712;
  --c-dark-ink:#E8F0E6;
  --c-dark-line:rgba(232,240,230,.14);
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,23,18,.06),0 2px 8px rgba(11,23,18,.05);
  --sh-2:0 6px 20px rgba(11,23,18,.08);
  --sh-3:0 16px 40px rgba(11,23,18,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--c-brand-2);text-decoration:none}
a:hover{color:var(--c-brand)}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;line-height:1.4}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section--surface{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{max-width:820px;margin-bottom:40px}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--c-brand-2);text-transform:uppercase;margin-bottom:12px}
.section-head .eyebrow::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--c-accent)}
.section-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700}
.section-head p{margin-top:14px;color:var(--c-ink-2);font-size:15.5px;max-width:760px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);border:1.5px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn svg{width:16px;height:16px;flex:none}
.btn-primary{background:var(--c-accent);color:var(--c-accent-ink);border-color:var(--c-accent);box-shadow:var(--sh-1)}
.btn-primary:hover{background:#bbeb3f;transform:translateY(-1px);box-shadow:var(--sh-2);color:var(--c-accent-ink)}
.btn-primary:active{transform:translateY(1px)}
.btn-dark{background:var(--c-brand);color:#fff;border-color:var(--c-brand)}
.btn-dark:hover{background:#0c3125;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-outline{background:transparent;color:var(--c-brand);border-color:var(--c-brand)}
.btn-outline:hover{background:rgba(15,61,46,.08);color:var(--c-brand)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}
.btn:disabled,.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--c-brand-2)}
.link-arrow svg{width:15px;height:15px;transition:transform .2s ease}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--c-line);
  backdrop-filter:saturate(150%) blur(8px);
  transition:box-shadow .2s ease,height .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:36px;height:36px;border-radius:11px;background:var(--c-brand);display:grid;place-items:center;flex:none}
.brand-mark svg{width:18px;height:18px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:800;color:var(--c-ink);letter-spacing:.02em}
.brand-text small{font-size:11px;color:var(--c-ink-2);letter-spacing:.16em}
.nav-menu{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{position:relative;display:inline-flex;align-items:center;padding:10px 12px;border-radius:8px;font-size:15px;font-weight:600;color:var(--c-ink-2);transition:color .2s ease,background-color .2s ease}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--c-accent);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.nav-link:hover{color:var(--c-brand);background:var(--c-surface-2)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-brand)}
.nav-link.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;flex:none}
.nav-toggle{
  display:none;position:relative;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--c-line);background:var(--c-surface);
}
.nav-toggle span{position:absolute;left:13px;right:13px;top:50%;height:2px;margin-top:-1px;background:var(--c-ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;right:0;height:2px;background:var(--c-ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- 分类页 Hero ---------- */
.cat-hero{
  position:relative;
  padding:72px 0 64px;
  min-height:280px;
  color:#fff;
  background-image:linear-gradient(105deg,rgba(11,23,18,.86) 0%,rgba(11,23,18,.72) 52%,rgba(15,61,46,.58) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover,cover;
  background-position:center,center;
  background-repeat:no-repeat;
}
.cat-hero .crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(232,240,230,.78);margin-bottom:22px;flex-wrap:wrap}
.cat-hero .crumb a{color:rgba(232,240,230,.9);text-decoration:underline;text-underline-offset:3px}
.cat-hero .crumb a:hover{color:var(--c-accent)}
.cat-hero .crumb span{opacity:.6}
.cat-hero h1{color:#fff;font-size:clamp(28px,4.2vw,46px);font-weight:800;line-height:1.25;max-width:880px}
.cat-hero .hero-sub{margin-top:18px;max-width:720px;font-size:16.5px;color:rgba(232,240,230,.9)}
.cat-hero .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 13px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;background:rgba(198,242,78,.16);color:var(--c-accent);border:1px solid rgba(198,242,78,.32)}
.tag--muted{background:rgba(232,240,230,.12);color:rgba(232,240,230,.86);border-color:rgba(232,240,230,.2)}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;margin-top:8px}
.timeline::before{content:"";position:absolute;left:27px;top:14px;bottom:26px;width:2px;background:linear-gradient(180deg,var(--c-accent) 0%,rgba(15,61,46,.22) 100%)}
.tl-item{position:relative;display:grid;grid-template-columns:56px 1fr;gap:22px;padding-bottom:34px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  width:56px;height:56px;border-radius:50%;background:var(--c-accent);color:var(--c-accent-ink);
  display:grid;place-items:center;font-weight:800;font-size:17px;
  font-variant-numeric:tabular-nums;box-shadow:0 6px 18px rgba(11,23,18,.14);
  border:4px solid var(--c-bg);z-index:1;
}
.tl-body{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:24px 26px;box-shadow:var(--sh-1);transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s ease;
}
.tl-item:hover .tl-body{transform:translateY(-3px);box-shadow:var(--sh-2)}
.tl-body h3{font-size:19px;margin-bottom:10px}
.tl-body p{color:var(--c-ink-2);font-size:15.5px}
.tl-list{margin-top:14px;display:grid;gap:8px}
.tl-list li{position:relative;padding-left:20px;font-size:14.5px;color:var(--c-ink-2)}
.tl-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;background:var(--c-brand-2);opacity:.6}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

/* ---------- 安全要点卡片 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s ease;
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.card-media{position:relative;aspect-ratio:16/9;background:var(--c-surface-2);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s cubic-bezier(.2,.7,.2,1)}
.card:hover .card-media img{transform:scale(1.04)}
.card-badge{position:absolute;top:12px;left:12px;height:26px;padding:0 11px;display:inline-flex;align-items:center;border-radius:var(--r-pill);background:rgba(255,255,255,.94);color:var(--c-brand);font-size:12px;font-weight:700}
.card-badge--hot{background:var(--c-hot);color:#fff}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:18px}
.card-body p{font-size:14.5px;color:var(--c-ink-2)}
.card-body .link-arrow{margin-top:auto}

/* ---------- 场景列表 ---------- */
.scene-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border-top:1px solid var(--c-line);margin-top:8px}
.scene{display:flex;gap:16px;padding:24px 0;border-bottom:1px solid var(--c-line)}
.scene:nth-child(odd){padding-right:32px}
.scene:nth-child(even){padding-left:32px;border-left:1px solid var(--c-line)}
.scene-icon{width:44px;height:44px;flex:none;border-radius:12px;background:var(--c-surface-2);display:grid;place-items:center;color:var(--c-brand)}
.scene-icon svg{width:20px;height:20px}
.scene h3{font-size:17px;margin-bottom:6px}
.scene p{font-size:14.5px;color:var(--c-ink-2)}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto;border-top:1px solid var(--c-line)}
.faq details{border-bottom:1px solid var(--c-line)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 4px;font-size:16px;font-weight:600;color:var(--c-ink);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary .chev{width:22px;height:22px;flex:none;transition:transform .2s ease;color:var(--c-brand-2)}
.faq details[open] summary .chev{transform:rotate(180deg)}
.faq details[open] summary{color:var(--c-brand)}
.faq .faq-body{padding:0 4px 22px;color:var(--c-ink-2);font-size:15px;max-width:760px}

/* ---------- CTA 深色带 ---------- */
.cta-band{background:var(--c-dark);color:var(--c-dark-ink);padding:64px 0}
.cta-band .cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  background:rgba(232,240,230,.04);border:1px solid var(--c-dark-line);border-radius:24px;
  padding:40px 44px;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,30px)}
.cta-band p{margin-top:12px;color:rgba(232,240,230,.78);font-size:15.5px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn-outline{color:#fff;border-color:rgba(232,240,230,.5)}
.cta-band .btn-outline:hover{background:rgba(232,240,230,.12);color:#fff}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-dark);color:var(--c-dark-ink);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1.1fr;gap:32px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-mark{background:var(--c-accent)}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text small{color:rgba(232,240,230,.6)}
.footer-brand p{font-size:14px;color:rgba(232,240,230,.68);max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col li,.footer-col a{font-size:13.5px;color:rgba(232,240,230,.7)}
.footer-col a:hover{color:var(--c-accent)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--c-dark-line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(232,240,230,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .section{padding:72px 0}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:1023px){
  .header-inner{gap:16px}
  .nav-toggle{display:block}
  .nav-menu{
    position:fixed;top:0;right:0;height:100vh;width:86vw;max-width:360px;
    background:var(--c-surface);flex-direction:column;align-items:stretch;gap:4px;
    padding:92px 22px 28px;box-shadow:var(--sh-3);
    transform:translateX(100%);transition:transform .25s ease;overflow-y:auto;z-index:70;
  }
  .nav-menu.is-open{transform:translateX(0)}
  .nav-link{padding:14px 12px;font-size:16px;border-radius:10px}
  .nav-link::after{display:none}
  .nav-link.is-active{background:var(--c-surface-2)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .scene-list{grid-template-columns:1fr}
  .scene:nth-child(odd){padding-right:0}
  .scene:nth-child(even){padding-left:0;border-left:0}
  .cta-band .cta-inner{padding:32px 28px}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .section--tight{padding:40px 0}
  .cat-hero{padding:52px 0 44px}
  .tl-item{grid-template-columns:44px 1fr;gap:16px}
  .tl-dot{width:44px;height:44px;font-size:15px;border-width:3px}
  .timeline::before{left:21px}
  .tl-body{padding:20px}
  .grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:560px){
  .container{padding:0 18px}
  body{font-size:15.5px}
  .header-actions .btn-sm{display:none}
  .brand-text strong{font-size:16px}
  .tl-item{grid-template-columns:38px 1fr;gap:12px}
  .tl-dot{width:38px;height:38px;font-size:14px}
  .timeline::before{left:18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-band .cta-inner{padding:26px 20px;border-radius:18px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
}

/* roulang page: category4 */
:root{
  --c-bg:#F4F6F2;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2E9;
  --c-ink:#0E1A15;
  --c-ink-2:#4A5A52;
  --c-line:#DCE4DA;
  --c-brand:#0F3D2E;
  --c-brand-2:#1F8A63;
  --c-accent:#C6F24E;
  --c-accent-ink:#16321A;
  --c-hot:#FF6B35;
  --c-dark:#0B1712;
  --c-dark-ink:#E8F0E6;
  --c-dark-line:rgba(232,240,230,.14);
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,23,18,.06),0 2px 8px rgba(11,23,18,.05);
  --sh-2:0 6px 20px rgba(11,23,18,.08);
  --sh-3:0 16px 40px rgba(11,23,18,.12);
  --font:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-brand-2);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--c-brand);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,dl,dd,dt{margin:0;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:4px;}

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

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-sm);
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--c-accent);color:var(--c-accent-ink);box-shadow:var(--sh-1);}
.btn-primary:hover{background:#B8E63C;color:var(--c-accent-ink);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(1px);}
.btn-dark{background:var(--c-brand);color:#fff;}
.btn-dark:hover{background:#14523D;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-dark:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--c-brand);border:1.5px solid var(--c-brand);}
.btn-ghost:hover{background:rgba(15,61,46,.08);color:var(--c-brand);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-outline-light{background:transparent;color:var(--c-dark-ink);border:1.5px solid rgba(232,240,230,.4);}
.btn-outline-light:hover{background:rgba(232,240,230,.12);color:#fff;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:height .25s var(--ease),box-shadow .25s var(--ease);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
  transition:height .25s var(--ease);
}
.site-header.is-compact .header-inner{height:64px;}
.site-header.is-compact{box-shadow:var(--sh-2);}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-ink);}
.brand:hover{color:var(--c-ink);}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-brand);
  border-radius:10px;
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:.02em;}
.brand-text small{font-size:11px;font-weight:600;color:var(--c-brand-2);letter-spacing:.18em;}

.nav-menu{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 12px;
  font-size:15px;
  font-weight:600;
  color:var(--c-ink);
  border-radius:8px;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--c-accent);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--c-brand-2);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-brand);}
.nav-link.is-active::after{transform:scaleX(1);}

.header-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid var(--c-line);
  position:relative;
  background:var(--c-surface);
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;
  width:18px;height:2px;background:var(--c-ink);
  border-radius:2px;
  transform:translateX(-50%);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";left:0;top:-6px;transform:none;}
.nav-toggle span::after{content:"";left:0;top:6px;transform:none;}
body.nav-locked{overflow:hidden;}

/* ---------- 分类页首屏 ---------- */
.page-hero{
  position:relative;
  padding:64px 0 56px;
  background-image:linear-gradient(100deg,rgba(11,23,18,.92) 0%,rgba(15,61,46,.82) 48%,rgba(15,61,46,.55) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  color:var(--c-dark-ink);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:repeating-linear-gradient(90deg,rgba(232,240,230,.06) 0 1px,transparent 1px 56px);
  opacity:.5;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb{font-size:13px;color:rgba(232,240,230,.72);margin-bottom:18px;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li::after{content:"/";margin-left:8px;color:rgba(232,240,230,.4);}
.breadcrumb li:last-child::after{display:none;}
.breadcrumb a{color:rgba(232,240,230,.82);}
.breadcrumb a:hover{color:var(--c-accent);}
.breadcrumb .is-current{color:var(--c-accent);}
.page-hero h1{
  font-size:clamp(28px,3.6vw,42px);
  line-height:1.25;
  font-weight:800;
  letter-spacing:.01em;
  max-width:840px;
}
.hero-sub{
  margin-top:16px;
  max-width:660px;
  font-size:16px;
  line-height:1.85;
  color:rgba(232,240,230,.82);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-tags span{
  padding:6px 14px;
  font-size:13px;
  font-weight:600;
  border-radius:var(--r-pill);
  background:rgba(198,242,78,.14);
  color:var(--c-accent);
  border:1px solid rgba(198,242,78,.3);
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section-alt{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.section-head{max-width:760px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--c-brand-2);text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:3px;background:var(--c-accent);border-radius:2px;}
.section-title{
  font-size:clamp(22px,2.6vw,32px);
  line-height:1.35;
  font-weight:700;
  color:var(--c-ink);
}
.section-sub{margin-top:14px;color:var(--c-ink-2);font-size:15.5px;line-height:1.85;}

/* ---------- 定义式对照列表 ---------- */
.spec-list{
  border-top:1px solid var(--c-line);
  background:var(--c-surface);
  border-radius:var(--r-lg);
  border:1px solid var(--c-line);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.spec-item{
  display:flex;
  gap:32px;
  padding:24px 28px;
  border-bottom:1px solid var(--c-line);
  transition:background-color .25s var(--ease);
}
.spec-item:last-child{border-bottom:0;}
.spec-item:hover{background:var(--c-surface-2);}
.spec-term{
  flex:0 0 200px;
  font-size:16px;
  font-weight:700;
  color:var(--c-brand);
  display:flex;
  align-items:flex-start;
  gap:10px;
}
.spec-term::before{
  content:"";
  flex:0 0 8px;width:8px;height:8px;margin-top:9px;
  border-radius:2px;background:var(--c-accent);
}
.spec-desc{flex:1;color:var(--c-ink-2);font-size:15.5px;line-height:1.85;}

/* ---------- 信息卡 ---------- */
.info-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
  margin-top:32px;
}
.info-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.info-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.info-card-media{aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2);}
.info-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.info-card:hover .info-card-media img{transform:scale(1.04);}
.info-card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.info-card-body h3{font-size:19px;font-weight:700;line-height:1.5;}
.info-card-body p{color:var(--c-ink-2);font-size:15px;line-height:1.85;}
.list-check{display:flex;flex-direction:column;gap:8px;margin-top:4px;}
.list-check li{
  position:relative;
  padding-left:22px;
  font-size:14.5px;
  color:var(--c-ink-2);
}
.list-check li::before{
  content:"";
  position:absolute;left:0;top:10px;
  width:10px;height:10px;
  border-radius:3px;
  background:var(--c-surface-2);
  border:2px solid var(--c-brand-2);
}

/* ---------- 双栏对照 ---------- */
.compare{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:36px;}
.compare-col{
  background:var(--c-dark);
  border-radius:var(--r-lg);
  padding:28px;
  color:var(--c-dark-ink);
  border:1px solid var(--c-dark-line);
}
.compare-col.is-light{
  background:var(--c-surface);
  color:var(--c-ink);
  border:1px solid var(--c-line);
  box-shadow:var(--sh-1);
}
.compare-col h3{font-size:19px;font-weight:700;margin-bottom:16px;}
.badge{
  display:inline-flex;align-items:center;
  padding:4px 12px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  background:rgba(198,242,78,.16);
  color:var(--c-accent);
  margin-bottom:14px;
}
.compare-col.is-light .badge{background:var(--c-surface-2);color:var(--c-brand);}
.compare-list{display:flex;flex-direction:column;gap:14px;}
.compare-list li{
  display:flex;
  gap:12px;
  font-size:15px;
  line-height:1.8;
  padding-bottom:14px;
  border-bottom:1px dashed var(--c-dark-line);
}
.compare-col.is-light .compare-list li{border-bottom-color:var(--c-line);}
.compare-list li:last-child{border-bottom:0;padding-bottom:0;}
.compare-list b{flex:0 0 4px;width:4px;height:auto;border-radius:2px;background:var(--c-accent);margin-top:6px;}
.compare-col.is-light .compare-list b{background:var(--c-brand-2);}
.compare-list span{flex:1;color:rgba(232,240,230,.8);}
.compare-col.is-light .compare-list span{color:var(--c-ink-2);}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow .25s var(--ease);
}
.faq-item[open]{box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  font-size:16px;
  font-weight:600;
  color:var(--c-ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";
  flex:0 0 10px;width:10px;height:10px;
  border-right:2px solid var(--c-brand-2);
  border-bottom:2px solid var(--c-brand-2);
  transform:rotate(45deg);
  transition:transform .2s var(--ease);
  margin-top:-4px;
}
.faq-item[open] summary::after{transform:rotate(-135deg);margin-top:4px;}
.faq-item p{
  padding:0 22px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--c-ink-2);
  animation:fadeIn .2s var(--ease);
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--c-dark);
  color:var(--c-dark-ink);
  border-radius:24px;
  padding:48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;right:-80px;top:-80px;width:280px;height:280px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(198,242,78,.18),transparent 68%);
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.4;color:#fff;}
.cta-band p{margin-top:14px;color:rgba(232,240,230,.78);font-size:15.5px;max-width:620px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:2;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-dark);color:var(--c-dark-ink);padding:64px 0 28px;margin-top:0;}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:40px;
  border-bottom:1px solid var(--c-dark-line);
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text small{color:var(--c-accent);}
.footer-brand .brand-mark{background:var(--c-accent);}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(232,240,230,.66);max-width:360px;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:rgba(232,240,230,.68);}
.footer-col a:hover{color:var(--c-accent);}
.footer-contact li{font-size:13.5px;color:rgba(232,240,230,.68);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-top:24px;
  font-size:13px;
  color:rgba(232,240,230,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .section{padding:72px 0;}
  .header-inner{gap:16px;}
  .nav-link{padding:0 9px;font-size:14.5px;}
}
@media (max-width:1023px){
  .section{padding:64px 0;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .nav-menu{
    position:fixed;
    top:0;right:0;
    height:100dvh;
    width:86vw;
    max-width:360px;
    background:var(--c-surface);
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:92px 24px 32px;
    transform:translateX(105%);
    transition:transform .22s var(--ease);
    box-shadow:var(--sh-3);
    z-index:90;
    overflow-y:auto;
  }
  .nav-menu.is-open{transform:translateX(0);}
  .nav-link{height:52px;font-size:16px;border-bottom:1px solid var(--c-line);border-radius:0;padding:0 4px;}
  .nav-link::after{display:none;}
  .nav-link.is-active{color:var(--c-brand);}
  .info-grid{grid-template-columns:1fr;}
  .compare{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .page-hero{padding:44px 0 40px;}
  .spec-item{flex-direction:column;gap:10px;padding:20px;}
  .spec-term{flex:none;}
  .compare-col{padding:22px;}
  .cta-band{border-radius:18px;padding:28px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 100%;}
}
@media (max-width:560px){
  .container{padding:0 18px;}
  body{font-size:15.5px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .hero-tags span{font-size:12px;padding:5px 11px;}
}