/* roulang page: index */
:root{
  --c-ink:#101A17;--c-ink-2:#2A3733;--c-ink-3:#46534E;
  --c-paper:#F5F2EC;--c-card:#FFFFFF;--c-sand:#E7DFD2;
  --c-accent:#C6F24A;--c-alert:#E2542C;--c-muted:#6E7A75;
  --c-line:rgba(16,26,23,.12);--c-line-strong:rgba(16,26,23,.24);
  --r-sm:6px;--r-md:12px;--r-pill:999px;
  --sh-1:0 1px 0 rgba(16,26,23,.04),0 8px 24px -14px rgba(16,26,23,.18);
  --sh-2:0 24px 60px -32px rgba(16,26,23,.32);
  --sp-1:8px;--sp-2:16px;--sp-3:24px;--sp-4:32px;--sp-5:48px;--sp-6:64px;--sp-7:96px;--sp-8:128px;
  --ease:cubic-bezier(.22,1,.36,1);--dur:240ms;--dur-lg:600ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0 0 64px;background:var(--c-paper);color:var(--c-ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.9;font-weight:400;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
ul,ol,dl{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,blockquote,figure{margin:0}
button{font-family:inherit}
summary{list-style:none;cursor:pointer}
summary::-webkit-details-marker{display:none}
::selection{background:var(--c-accent);color:var(--c-ink)}
:focus-visible{outline:2px solid var(--c-ink);outline-offset:2px}

.grid-container{max-width:1200px;padding-left:24px;padding-right:24px}
.grid-padding-x{margin-left:-12px;margin-right:-12px}
.grid-padding-x>.cell{padding-left:12px;padding-right:12px}

h1,h2,h3,h4{line-height:1.18;letter-spacing:-.02em;font-weight:800}
h1{font-size:clamp(2.25rem,5vw,4rem);line-height:1.1;letter-spacing:-.03em}
h2{font-size:clamp(1.75rem,3vw,2.5rem)}
h3{font-size:1.25rem;line-height:1.4;font-weight:700;letter-spacing:-.01em}
h4{font-size:1.0625rem;font-weight:700;letter-spacing:0}
p{max-width:68ch}
.lead{font-size:1rem;line-height:1.85;color:var(--c-muted);margin-top:16px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.75rem;font-weight:700;letter-spacing:.14em;color:var(--c-muted);text-transform:uppercase}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-alert)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 28px;border-radius:var(--r-pill);
  font-size:.9375rem;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn svg{width:16px;height:16px;flex:none;transition:transform var(--dur) var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--c-ink);color:var(--c-paper)}
.btn-primary:hover{background:var(--c-accent);color:var(--c-ink)}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:var(--c-line-strong)}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-paper);border-color:var(--c-ink)}
.btn-accent{background:var(--c-accent);color:var(--c-ink)}
.btn-accent:hover{background:var(--c-paper);color:var(--c-ink)}
.btn-sm{height:40px;padding:0 20px;font-size:.875rem}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:.9375rem;font-weight:700;
  padding-bottom:2px;border-bottom:1px solid transparent;position:relative;
  transition:color var(--dur) var(--ease);
}
.text-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--c-ink);transition:width var(--dur) var(--ease)}
.text-link:hover::after{width:100%}

/* ===== 徽章 / 标签 ===== */
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);border:1px solid var(--c-line-strong);
  font-size:.75rem;font-weight:700;letter-spacing:.06em;color:var(--c-ink-3);
  white-space:nowrap;
}
.badge-cat{border-color:rgba(226,84,44,.55);color:var(--c-alert);background:rgba(226,84,44,.06)}
.badge-key{border-color:rgba(16,26,23,.34);color:var(--c-ink)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--sp-4)}
.on-dark .badge{border-color:rgba(198,242,74,.5);color:var(--c-accent)}
.on-dark .badge-cat{border-color:rgba(198,242,74,.5);color:var(--c-accent);background:transparent}

/* ===== 顶部导航 ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:80;transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.site-header .bar{display:flex;align-items:center;justify-content:space-between;gap:24px;height:80px;transition:height var(--dur) var(--ease)}
.site-header.is-scrolled{background:rgba(245,242,236,.94);border-bottom:1px solid var(--c-line);backdrop-filter:blur(8px)}
.site-header.is-scrolled .bar{height:64px}
.logo{display:flex;flex-direction:column;line-height:1.1;flex:none}
.logo-main{font-size:1.125rem;font-weight:800;letter-spacing:-.02em;color:var(--c-ink)}
.logo-main span{color:var(--c-ink-3)}
.logo-sub{font-size:.6875rem;font-weight:700;letter-spacing:.16em;color:var(--c-muted);margin-top:5px}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{
  position:relative;font-size:.9375rem;font-weight:500;color:var(--c-ink-2);
  padding:6px 0;transition:color var(--dur) var(--ease);
}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--c-ink);transition:width var(--dur) var(--ease)}
.nav-links a:hover{color:var(--c-ink)}
.nav-links a:hover::after{width:100%}
.nav-links a.is-active{color:var(--c-ink);font-weight:700}
.nav-links a.is-active::after{width:100%;background:var(--c-alert)}
.header-cta{display:flex;align-items:center;gap:12px;flex:none}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line-strong);border-radius:var(--r-sm);
  background:transparent;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-panel{display:none;border-top:1px solid var(--c-line);background:var(--c-paper)}
.mobile-panel.is-open{display:block}
.mobile-panel .grid-container{padding-top:16px;padding-bottom:24px}
.mobile-panel a{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--c-line);font-size:1rem;font-weight:600}
.mobile-panel a:last-child{border-bottom:none}
.mobile-panel a .mo-index{font-size:.75rem;font-weight:700;letter-spacing:.1em;color:var(--c-muted)}

/* ===== 底部 Tab ===== */
.tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  height:64px;padding-bottom:env(safe-area-inset-bottom);
  background:rgba(245,242,236,.97);border-top:1px solid var(--c-line);
  backdrop-filter:blur(10px);
}
.tabbar a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  position:relative;font-size:10px;font-weight:700;color:var(--c-muted);
  transition:color var(--dur) var(--ease);
}
.tabbar a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.6;transition:fill var(--dur) var(--ease)}
.tabbar a::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:var(--c-accent);transition:width var(--dur) var(--ease)}
.tabbar a.is-active{color:var(--c-ink)}
.tabbar a.is-active::before{width:56%}
.tabbar a.is-active svg{fill:currentColor;fill-opacity:.16;stroke-width:2}

/* ===== Hero ===== */
.hero{padding-top:132px;padding-bottom:clamp(56px,7vw,96px);position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--c-line)}
.hero-title{margin-top:18px;max-width:15ch}
.hero-sub{margin-top:22px;font-size:1.0625rem;line-height:1.8;color:var(--c-muted);max-width:34ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:0;margin-top:44px;border-top:1px solid var(--c-line)}
.hero-metrics li{flex:1 1 0;min-width:110px;padding:18px 16px 0 0}
.hero-metrics li + li{border-left:1px solid var(--c-line);padding-left:20px}
.hero-metrics strong{display:block;font-size:1.75rem;font-weight:800;letter-spacing:-.03em;line-height:1.2}
.hero-metrics span{display:block;font-size:.75rem;font-weight:700;letter-spacing:.08em;color:var(--c-muted);margin-top:6px}
.hero-visual{position:relative;margin-top:40px}
.hero-frame{position:relative;border:1px solid var(--c-line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-2);background:var(--c-card)}
.hero-frame img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-frame::before{
  content:"";position:absolute;top:14px;left:14px;width:58px;height:58px;
  border-top:2px solid var(--c-accent);border-left:2px solid var(--c-accent);z-index:2;
}
.hero-frame::after{
  content:"";position:absolute;bottom:14px;right:14px;width:58px;height:58px;
  border-bottom:2px solid var(--c-accent);border-right:2px solid var(--c-accent);z-index:2;
}

/* ===== 通用板块 ===== */
.section{padding:clamp(72px,8vw,128px) 0;border-top:1px solid var(--c-line)}
.section--tight{padding:clamp(56px,6vw,88px) 0}
.sec-head{max-width:760px}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;flex-wrap:wrap}

/* ===== 价值主张 ===== */
.num-list{margin-top:8px}
.num-list li{display:grid;grid-template-columns:64px 1fr;gap:16px;padding:24px 0;border-top:1px solid var(--c-line)}
.num-list li:first-child{border-top:none;padding-top:0}
.num-list .num{font-size:1.75rem;font-weight:800;line-height:1;color:var(--c-sand);letter-spacing:-.03em}
.num-list h3{margin-bottom:8px}
.num-list p{font-size:.9375rem;line-height:1.8;color:var(--c-muted);max-width:52ch}

/* ===== 能力卡 ===== */
.cap-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;margin-top:var(--sp-5)}
.cap-card{
  grid-column:span 6;background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:28px;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.cap-card:hover{transform:translateY(-2px);border-color:var(--c-line-strong);box-shadow:var(--sh-2)}
.cap-card--wide{grid-column:span 7}
.cap-card--narrow{grid-column:span 5}
.cap-card .cap-num{font-size:1.75rem;font-weight:800;color:var(--c-sand);line-height:1;letter-spacing:-.03em}
.cap-card h3{margin-top:14px}
.cap-card p{margin-top:10px;font-size:.9375rem;line-height:1.8;color:var(--c-muted)}
.cap-thumb{margin-top:22px;border:1px solid var(--c-line);border-radius:var(--r-sm);overflow:hidden}
.cap-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--dur-lg) var(--ease)}
.cap-card:hover .cap-thumb img{transform:scale(1.03)}
.cap-foot{margin-top:20px;display:flex;justify-content:flex-end}

/* ===== 使用场景 ===== */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;padding:clamp(36px,4vw,56px) 0;border-top:1px solid var(--c-line)}
.scene:first-of-type{border-top:none}
.scene-media{border:1px solid var(--c-line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);background:var(--c-card)}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.scene--rev .scene-media{order:2}
.scene--rev .scene-body{order:1}
.scene-body h3{margin-top:14px;font-size:1.5rem}
.scene-body p{margin-top:14px;font-size:.9375rem;line-height:1.85;color:var(--c-muted)}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}

/* ===== 深色证据区 ===== */
.section--dark{background:var(--c-ink);color:var(--c-paper);border-top-color:rgba(245,242,236,.16)}
.section--dark .lead{color:rgba(245,242,236,.66)}
.proof-quote{
  font-size:clamp(1.5rem,2.6vw,2rem);font-weight:800;line-height:1.5;letter-spacing:-.02em;
  border-left:2px solid var(--c-accent);padding-left:24px;max-width:22ch;
}
.proof-quote em{font-style:normal;color:var(--c-accent)}
.proof-metrics{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(245,242,236,.16);border:1px solid rgba(245,242,236,.16);border-radius:var(--r-md);overflow:hidden}
.proof-metrics div{background:var(--c-ink-2);padding:24px 20px}
.proof-metrics strong{display:block;font-size:clamp(1.5rem,2.4vw,2rem);font-weight:800;letter-spacing:-.03em;line-height:1.15}
.proof-metrics span{display:block;margin-top:8px;font-size:.8125rem;line-height:1.6;color:rgba(245,242,236,.62)}
.proof-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:40px;padding-top:32px;border-top:1px solid rgba(245,242,236,.16)}

/* ===== 档位 ===== */
.price-grid{display:grid;grid-template-columns:6fr 5fr;gap:24px;margin-top:var(--sp-5);align-items:start}
.plan{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-md);padding:32px;box-shadow:var(--sh-1);transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.plan:hover{transform:translateY(-2px);border-color:var(--c-line-strong)}
.plan-stack{display:grid;gap:24px}
.plan--main{background:var(--c-ink);color:var(--c-paper);border-color:var(--c-ink);box-shadow:var(--sh-2)}
.plan--main .plan-name{color:var(--c-paper)}
.plan--main .plan-for{color:rgba(245,242,236,.66)}
.plan--main .plan-feat li{color:rgba(245,242,236,.86);border-top-color:rgba(245,242,236,.14)}
.plan-name{font-size:1.375rem;font-weight:800;letter-spacing:-.01em}
.plan-for{margin-top:8px;font-size:.875rem;line-height:1.7;color:var(--c-muted)}
.plan-feat{margin-top:24px}
.plan-feat li{display:flex;align-items:flex-start;gap:10px;padding:12px 0;border-top:1px solid var(--c-line);font-size:.9375rem;line-height:1.7}
.plan-feat svg{width:16px;height:16px;flex:none;margin-top:4px;stroke:var(--c-alert);fill:none;stroke-width:2.4}
.plan--main .plan-feat svg{stroke:var(--c-accent)}
.plan .btn{margin-top:26px;width:100%}

/* ===== 资讯列表 ===== */
.news-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:var(--sp-5)}
.news-card{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.news-card:hover{transform:translateY(-2px);border-color:var(--c-line-strong);box-shadow:var(--sh-2)}
.news-link{display:flex;flex-direction:column;height:100%}
.news-thumb{overflow:hidden;border-bottom:1px solid var(--c-line)}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--dur-lg) var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:24px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:1.0625rem;line-height:1.5;margin-top:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover .news-body h3{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.news-body p{margin-top:10px;font-size:.9375rem;line-height:1.75;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;max-width:none}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:auto;padding-top:20px}
.news-meta time{font-size:.75rem;font-weight:700;letter-spacing:.06em;color:var(--c-muted)}
.read-more{font-size:.8125rem;font-weight:700;color:var(--c-ink);opacity:0;transform:translateX(-4px);transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease)}
.news-card:hover .read-more{opacity:1;transform:none}
.news-card--lead{grid-column:1/-1}
.news-card--lead .news-link{flex-direction:row}
.news-card--lead .news-thumb{width:42%;border-bottom:none;border-right:1px solid var(--c-line)}
.news-card--lead .news-thumb img{height:100%;aspect-ratio:auto;min-height:280px}
.news-card--lead .news-body{padding:32px;justify-content:center}
.news-card--lead .news-body h3{font-size:1.375rem;line-height:1.45;margin-top:16px}
.news-card--lead .news-body p{font-size:.9375rem;max-width:56ch}
.empty-state{
  margin-top:var(--sp-5);min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  border:1px dashed var(--c-line-strong);border-radius:var(--r-md);background:var(--c-card);
  text-align:center;padding:32px;
}
.empty-state svg{width:34px;height:34px;stroke:var(--c-line-strong);fill:none;stroke-width:1.4}
.empty-state p{color:var(--c-muted);font-size:.9375rem;max-width:none}

/* ===== FAQ ===== */
.faq{margin-top:var(--sp-5);max-width:760px}
.faq details{border-top:1px solid var(--c-line)}
.faq details:last-of-type{border-bottom:1px solid var(--c-line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:1.0625rem;font-weight:700;line-height:1.6;
  transition:color var(--dur) var(--ease);
}
.faq summary:hover{color:var(--c-ink-3)}
.faq summary .pm{
  flex:none;width:22px;height:22px;position:relative;
  transition:transform var(--dur) var(--ease);
}
.faq summary .pm::before,.faq summary .pm::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--c-ink);transform:translate(-50%,-50%);
}
.faq summary .pm::before{width:14px;height:2px}
.faq summary .pm::after{width:2px;height:14px}
.faq details[open] summary .pm{transform:rotate(45deg)}
.faq .faq-body{padding:0 0 24px;font-size:.9375rem;line-height:1.85;color:var(--c-muted);max-width:66ch}

/* ===== 底部 CTA ===== */
.cta-band{background:var(--c-ink);color:var(--c-paper);border-top:1px solid rgba(245,242,236,.16);padding:clamp(48px,6vw,80px) 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(1.5rem,2.6vw,2rem);max-width:20ch}
.cta-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}

/* ===== 页脚 ===== */
.site-footer{background:var(--c-ink);color:var(--c-paper);padding-top:clamp(56px,7vw,88px);border-top:1px solid rgba(245,242,236,.16)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand .logo-main{color:var(--c-paper)}
.footer-brand .logo-main span{color:rgba(245,242,236,.55)}
.footer-brand .logo-sub{color:rgba(245,242,236,.5)}
.footer-brand p{margin-top:18px;font-size:.9375rem;line-height:1.8;color:rgba(245,242,236,.62);max-width:34ch}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.footer-tags .badge{border-color:rgba(245,242,236,.24);color:rgba(245,242,236,.7)}
.footer-col h4{font-size:.8125rem;font-weight:700;letter-spacing:.1em;color:rgba(245,242,236,.5);display:flex;align-items:center;gap:8px}
.footer-col h4::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.footer-links{margin-top:20px;display:grid;gap:12px}
.footer-links a{font-size:.9375rem;color:rgba(245,242,236,.78);transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);display:inline-block}
.footer-links a:hover{color:var(--c-accent);transform:translateX(3px)}
.footer-info{margin-top:20px;display:grid;gap:12px;font-size:.9375rem;color:rgba(245,242,236,.72);line-height:1.7}
.footer-info strong{color:var(--c-paper);font-weight:700}
.footer-bottom{margin-top:clamp(40px,5vw,64px);border-top:1px solid rgba(245,242,236,.16);padding:24px 0 28px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:.8125rem;color:rgba(245,242,236,.5)}

/* ===== 动效 ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.fade-item{animation:fadeUp var(--dur-lg) var(--ease) both}
.fade-item:nth-of-type(1){animation-delay:.05s}
.fade-item:nth-of-type(2){animation-delay:.13s}
.fade-item:nth-of-type(3){animation-delay:.21s}
.fade-item:nth-of-type(4){animation-delay:.29s}
.reveal{opacity:0;transform:translateY(12px);transition:opacity var(--dur-lg) var(--ease),transform var(--dur-lg) var(--ease)}
.reveal.is-in{opacity:1;transform:translateY(0)}

/* ===== 响应式 ===== */
@media (max-width:1023px){
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}
  .nav-links,.header-cta{display:none}
  .nav-toggle{display:flex}
  .tabbar{display:flex}
  .hero{padding-top:112px}
  .hero-visual{margin-top:0}
  .cap-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cap-card,.cap-card--wide,.cap-card--narrow{grid-column:span 1}
  .scene{grid-template-columns:1fr;gap:24px}
  .scene--rev .scene-media,.scene--rev .scene-body{order:initial}
  .price-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .news-card--lead .news-link{flex-direction:column}
  .news-card--lead .news-thumb{width:100%;border-right:none;border-bottom:1px solid var(--c-line)}
  .news-card--lead .news-thumb img{min-height:0;aspect-ratio:16/9}
  .news-card--lead .news-body{padding:24px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .read-more{opacity:1;transform:none}
}
@media (max-width:767px){
  .grid-container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .hero-metrics li{padding-top:14px}
  .hero-metrics strong{font-size:1.5rem}
  .num-list li{grid-template-columns:48px 1fr;gap:12px}
  .num-list .num{font-size:1.375rem}
  .cap-grid{grid-template-columns:1fr;gap:18px}
  .cap-card{padding:22px}
  .plan{padding:24px}
  .proof-metrics{grid-template-columns:1fr 1fr}
  .news-card--lead .news-body h3{font-size:1.1875rem}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-inner .btn{width:100%}
  .scene-body h3{font-size:1.25rem}
  .proof-quote{font-size:1.375rem;padding-left:18px;max-width:none}
}
@media (max-width:520px){
  h1{font-size:2rem}
  .hero-actions .btn{width:100%}
  .hero-metrics{flex-wrap:wrap}
  .hero-metrics li{flex:1 1 50%;min-width:0;padding-right:12px}
  .hero-metrics li:nth-child(3){border-left:none;padding-left:0;border-top:1px solid var(--c-line);margin-top:14px;padding-top:14px}
  .proof-metrics{grid-template-columns:1fr}
  .news-meta{flex-direction:column;align-items:flex-start;gap:6px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1!important;transform:none!important}
}

/* roulang page: article */
:root{
  --c-ink:#101A17;
  --c-ink-2:#2A3733;
  --c-ink-3:#46534E;
  --c-paper:#F5F2EC;
  --c-card:#FFFFFF;
  --c-sand:#E7DFD2;
  --c-accent:#C6F24A;
  --c-alert:#E2542C;
  --c-muted:#6E7A75;
  --c-line:rgba(16,26,23,0.12);
  --c-line-strong:rgba(16,26,23,0.24);
  --r-sm:6px;
  --r-md:12px;
  --r-pill:999px;
  --sh-1:0 1px 0 rgba(16,26,23,.04), 0 8px 24px -14px rgba(16,26,23,.18);
  --sh-2:0 24px 60px -32px rgba(16,26,23,.32);
  --sp-1:8px;
  --sp-2:16px;
  --sp-3:24px;
  --sp-4:32px;
  --sp-5:48px;
  --sp-6:64px;
  --sp-7:96px;
  --sp-8:128px;
  --ease:cubic-bezier(.22,1,.36,1);
  --dur:240ms;
  --dur-lg:600ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:var(--c-paper);
  color:var(--c-ink);
  font-size:16px;
  line-height:1.9;
  font-variant-numeric:tabular-nums;
  padding-bottom:calc(64px + env(safe-area-inset-bottom));
  -webkit-font-smoothing:antialiased;
}
@media (min-width:1024px){
  body{padding-bottom:0}
}
h1,h2,h3,h4,h5,h6{font-family:inherit;color:var(--c-ink);margin:0;letter-spacing:-0.02em}
p{font-size:inherit;line-height:inherit;margin:0}
ul,ol{margin:0;padding:0}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;background-color:transparent}
a:hover{color:inherit}
button{font-family:inherit;cursor:pointer}
time{font-variant-numeric:tabular-nums}
::selection{background:var(--c-ink);color:var(--c-paper)}
.grid-container{max-width:1200px;width:100%;margin:0 auto;padding:0 24px}
@media (max-width:520px){
  .grid-container{padding:0 20px}
}
/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 28px;border-radius:var(--r-pill);
  font-size:.9375rem;font-weight:700;letter-spacing:0;
  border:1px solid transparent;background:transparent;color:var(--c-ink);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
  white-space:nowrap;
}
.btn svg{width:16px;height:16px;flex:none;transition:transform var(--dur) var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn:focus-visible{outline:2px solid var(--c-ink);outline-offset:2px}
.btn-primary{background:var(--c-ink);color:var(--c-paper)}
.btn-primary:hover{background:var(--c-accent);color:var(--c-ink)}
.btn-secondary{background:transparent;color:var(--c-ink);border-color:var(--c-line-strong)}
.btn-secondary:hover{background:var(--c-ink);color:var(--c-paper);border-color:var(--c-ink)}
.btn-on-dark{background:var(--c-accent);color:var(--c-ink)}
.btn-on-dark:hover{background:var(--c-paper);color:var(--c-ink)}
.btn-sm{height:40px;padding:0 22px;font-size:.875rem}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:var(--r-pill);border:1px solid var(--c-line-strong);
  font-size:.75rem;font-weight:700;letter-spacing:.06em;
  color:var(--c-ink-2);background:transparent;white-space:nowrap;
}
.badge-alert{border-color:var(--c-alert);color:var(--c-alert)}
.meta{font-size:.75rem;font-weight:700;letter-spacing:.08em;color:var(--c-muted)}
/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(245,242,236,.94);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--dur) var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 30px -24px rgba(16,26,23,.5)}
.header-inner{display:flex;align-items:center;gap:20px;height:80px;transition:height var(--dur) var(--ease)}
.site-header.is-scrolled .header-inner{height:64px}
.logo{display:flex;flex-direction:column;line-height:1.15;letter-spacing:-0.02em;flex:none}
.logo-main{font-size:1.25rem;font-weight:800;color:var(--c-ink);white-space:nowrap}
.logo-main span{color:var(--c-ink-3);font-weight:800}
.logo-sub{font-size:.6875rem;font-weight:600;letter-spacing:.08em;color:var(--c-muted);margin-top:3px}
.nav-links{display:none;margin-left:auto;gap:30px;align-items:center}
.nav-links a{
  position:relative;font-size:.9375rem;font-weight:500;color:var(--c-ink-2);
  padding:6px 0;transition:color var(--dur) var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--c-ink);transition:width var(--dur) var(--ease);
}
.nav-links a:hover{color:var(--c-ink)}
.nav-links a:hover::after,.nav-links a.is-active::after{width:100%}
.nav-links a.is-active{color:var(--c-ink);font-weight:700}
.header-cta{display:none;height:40px;padding:0 22px;font-size:.875rem;flex:none}
.nav-toggle{
  margin-left:auto;display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--c-line-strong);background:transparent;color:var(--c-ink);
  transition:background var(--dur) var(--ease);
}
.nav-toggle:hover{background:var(--c-sand)}
.nav-toggle:focus-visible{outline:2px solid var(--c-ink);outline-offset:2px}
.nav-toggle svg{width:20px;height:20px}
.mobile-menu{
  border-top:1px solid var(--c-line);background:var(--c-paper);
  padding:8px 0 20px;
}
.mobile-menu nav{display:flex;flex-direction:column}
.mobile-menu a{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 0;font-size:1rem;font-weight:600;color:var(--c-ink-2);
  border-bottom:1px solid var(--c-line);
}
.mobile-menu a:last-child{border-bottom:none}
.mobile-menu a.is-active{color:var(--c-ink)}
.mobile-menu a::after{content:"→";color:var(--c-muted);font-size:.9375rem}
@media (min-width:1024px){
  .nav-links{display:flex}
  .header-cta{display:inline-flex}
  .nav-toggle{display:none}
  .mobile-menu{display:none}
}
/* ---------- 移动底部 Tab ---------- */
.tab-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:flex;
  background:rgba(245,242,236,.97);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-top:1px solid var(--c-line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tab-item{
  position:relative;flex:1;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:3px;
  height:64px;font-size:10px;font-weight:700;letter-spacing:.04em;
  color:var(--c-muted);transition:color var(--dur) var(--ease);
}
.tab-item::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:0;height:2px;background:var(--c-accent);
  transition:width var(--dur) var(--ease);
}
.tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.6}
.tab-item.is-active{color:var(--c-ink)}
.tab-item.is-active::before{width:26px}
.tab-item:focus-visible{outline:2px solid var(--c-ink);outline-offset:-4px}
@media (min-width:1024px){
  .tab-bar{display:none}
}
/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:28px 0 0;font-size:.8125rem;color:var(--c-muted);
}
.breadcrumb a{color:var(--c-muted);transition:color var(--dur) var(--ease)}
.breadcrumb a:hover{color:var(--c-ink)}
.breadcrumb .sep{color:var(--c-line-strong)}
.breadcrumb .current{color:var(--c-ink);font-weight:600}
/* ---------- 文章头部 ---------- */
.article-head{padding:24px 0 40px;border-bottom:1px solid var(--c-line)}
.article-head-inner{max-width:860px}
.article-title{
  font-size:clamp(1.85rem,4.4vw,3.25rem);
  font-weight:800;line-height:1.15;letter-spacing:-0.03em;
  color:var(--c-ink);margin:20px 0 24px;
  overflow-wrap:break-word;word-break:break-word;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  font-size:.75rem;font-weight:700;letter-spacing:.08em;color:var(--c-muted);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--c-line-strong)}
/* ---------- 正文 ---------- */
.article-main{padding:clamp(40px,5vw,64px) 0 0}
.article-wrap{max-width:760px;margin:0 auto}
.article-body{color:var(--c-ink-2);font-size:1.0625rem;line-height:1.9;overflow-wrap:break-word}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:clamp(1.375rem,2.4vw,1.75rem);font-weight:800;line-height:1.3;
  color:var(--c-ink);margin:40px 0 16px;padding-left:16px;
  border-left:3px solid var(--c-accent);letter-spacing:-0.02em;
}
.article-body h3{
  font-size:1.1875rem;font-weight:700;color:var(--c-ink);
  margin:32px 0 12px;line-height:1.45;
}
.article-body h4{font-size:1.0625rem;font-weight:700;color:var(--c-ink);margin:24px 0 10px}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.2em}
.article-body li{margin-bottom:.5em;line-height:1.85}
.article-body li::marker{color:var(--c-muted)}
.article-body blockquote{
  margin:28px 0;padding:24px;border-left:2px solid var(--c-ink);
  background:#FFFFFF;border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--c-ink-2);font-size:1rem;line-height:1.85;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  margin:28px 0;border:1px solid var(--c-line);border-radius:var(--r-md);
  width:100%;height:auto;object-fit:cover;
}
.article-body figure{margin:28px 0}
.article-body figcaption{
  font-size:.8125rem;color:var(--c-muted);margin-top:10px;text-align:center;
}
.article-body a{
  color:var(--c-ink);text-decoration:underline;
  text-decoration-thickness:1px;text-underline-offset:3px;
  transition:color var(--dur) var(--ease);
}
.article-body a:hover{color:var(--c-alert)}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;
  font-size:.9375rem;line-height:1.7;
}
.article-body th,.article-body td{
  border:1px solid var(--c-line);padding:12px 14px;text-align:left;
}
.article-body th{background:var(--c-sand);font-weight:700;color:var(--c-ink)}
.article-body code{
  background:var(--c-sand);border-radius:4px;padding:2px 6px;
  font-size:.9em;
}
/* ---------- 文末 ---------- */
.article-foot{
  margin-top:48px;padding-top:28px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
/* ---------- 空态 ---------- */
.empty-state{
  text-align:center;padding:56px 24px;border:1px solid var(--c-line);
  border-radius:var(--r-md);background:var(--c-card);box-shadow:var(--sh-1);
}
.empty-state svg{
  width:40px;height:40px;margin:0 auto 16px;display:block;
  stroke:var(--c-muted);fill:none;stroke-width:1.4;
}
.empty-state h2{font-size:1.375rem;font-weight:800;margin-bottom:10px}
.empty-state p{color:var(--c-muted);font-size:.9375rem;margin-bottom:24px}
/* ---------- 区块标题 ---------- */
.section{padding:clamp(48px,6vw,88px) 0}
.section-line{border-top:1px solid var(--c-line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:16px;justify-content:space-between;margin-bottom:32px}
.section-title{
  font-size:clamp(1.5rem,3vw,2.125rem);font-weight:800;line-height:1.2;
  letter-spacing:-0.02em;
}
.section-desc{color:var(--c-muted);font-size:.9375rem;line-height:1.75;margin-top:8px}
.link-more{
  display:inline-flex;align-items:center;gap:8px;font-size:.9375rem;font-weight:700;
  color:var(--c-ink);position:relative;padding-bottom:4px;
}
.link-more::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--c-ink);transition:width var(--dur) var(--ease);
}
.link-more:hover::after{width:100%}
.link-more svg{width:15px;height:15px;transition:transform var(--dur) var(--ease)}
.link-more:hover svg{transform:translateX(4px)}
/* ---------- 相关卡片 ---------- */
.related-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){
  .related-grid{grid-template-columns:repeat(3,1fr)}
}
.news-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.news-card:hover{transform:translateY(-2px);border-color:var(--c-line-strong);box-shadow:var(--sh-2)}
.news-thumb{aspect-ratio:16/10;overflow:hidden;border-bottom:1px solid var(--c-line)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--dur-lg) var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-body h3{font-size:1.0625rem;font-weight:700;line-height:1.5}
.news-body p{font-size:.9375rem;line-height:1.75;color:var(--c-muted)}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:8px}
.news-foot .meta{font-size:.75rem}
.news-foot .read{font-size:.875rem;font-weight:700;color:var(--c-ink);display:inline-flex;align-items:center;gap:6px}
.news-foot .read svg{width:14px;height:14px;transition:transform var(--dur) var(--ease)}
.news-card:hover .read svg{transform:translateX(4px)}
/* ---------- 深色 CTA ---------- */
.cta-band{
  background:var(--c-ink);color:var(--c-paper);border-radius:var(--r-md);
  padding:clamp(32px,5vw,56px);display:flex;flex-wrap:wrap;gap:28px;
  align-items:center;justify-content:space-between;box-shadow:var(--sh-2);
}
.cta-band h2{
  font-size:clamp(1.375rem,2.6vw,2rem);font-weight:800;line-height:1.25;
  color:var(--c-paper);letter-spacing:-0.02em;margin-bottom:12px;
}
.cta-band p{color:rgba(245,242,236,.7);font-size:.9375rem;line-height:1.8;max-width:52ch}
.cta-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.cta-band .badge{border-color:rgba(198,242,74,.55);color:var(--c-accent)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-ink);color:var(--c-paper);
  margin-top:clamp(64px,8vw,120px);
  padding:clamp(56px,7vw,96px) 0 0;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:768px){
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:40px}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px}
}
.site-footer .logo-main{color:var(--c-paper)}
.site-footer .logo-main span{color:rgba(245,242,236,.55)}
.site-footer .logo-sub{color:rgba(245,242,236,.45)}
.footer-brand p{
  color:rgba(245,242,236,.7);font-size:.9375rem;line-height:1.8;
  margin:16px 0 20px;max-width:34ch;
}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.site-footer .badge{border-color:rgba(245,242,236,.24);color:rgba(245,242,236,.8)}
.footer-col h4{
  position:relative;font-size:.9375rem;font-weight:700;
  color:var(--c-paper);margin:0 0 18px;padding-left:14px;letter-spacing:0;
}
.footer-col h4::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--c-accent);
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{
  font-size:.9375rem;color:rgba(245,242,236,.7);
  transition:color var(--dur) var(--ease);
}
.footer-links a:hover{color:var(--c-accent)}
.footer-info{display:flex;flex-direction:column;gap:14px;font-size:.9375rem;color:rgba(245,242,236,.7);line-height:1.7}
.footer-info strong{color:var(--c-paper);font-weight:700;display:inline-block;margin-bottom:2px}
.footer-bottom{
  margin-top:clamp(40px,5vw,64px);padding:24px 0;
  border-top:1px solid rgba(245,242,236,.16);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:.8125rem;color:rgba(245,242,236,.5);
}
@media (max-width:767px){
  .footer-bottom{padding-bottom:32px}
}
/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity var(--dur-lg) var(--ease),transform var(--dur-lg) var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --c-ink:#101A17; --c-ink-2:#2A3733; --c-ink-3:#46534E;
  --c-paper:#F5F2EC; --c-card:#FFFFFF; --c-sand:#E7DFD2;
  --c-accent:#C6F24A; --c-alert:#E2542C; --c-muted:#6E7A75;
  --c-line:rgba(16,26,23,.12); --c-line-strong:rgba(16,26,23,.24);
  --r-sm:6px; --r-md:12px; --r-pill:999px;
  --sh-1:0 1px 0 rgba(16,26,23,.04), 0 8px 24px -14px rgba(16,26,23,.18);
  --sh-2:0 24px 60px -32px rgba(16,26,23,.32);
  --sp-1:8px; --sp-2:16px; --sp-3:24px; --sp-4:32px;
  --sp-5:48px; --sp-6:64px; --sp-7:96px; --sp-8:128px;
  --ease:cubic-bezier(.22,1,.36,1); --dur:240ms; --dur-lg:600ms;
  --header-h:80px; --tab-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:112px}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.9;font-weight:400;
  color:var(--c-ink);background:var(--c-paper);
  font-variant-numeric:tabular-nums;
  padding-top:var(--header-h);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.18;letter-spacing:-.02em;color:var(--c-ink)}
h1{font-size:clamp(2.25rem,5vw,4rem);line-height:1.1;letter-spacing:-.03em}
h2{font-size:clamp(1.75rem,3vw,2.5rem)}
h3{font-size:1.25rem;font-weight:700;line-height:1.4}
h4{font-size:1.0625rem;font-weight:700;line-height:1.4}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
time{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--c-ink);outline-offset:2px}
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto}
@media (max-width:520px){.grid-container{padding-left:20px;padding-right:20px}}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 28px;border-radius:var(--r-pill);
  font-size:.9375rem;font-weight:700;letter-spacing:.02em;line-height:1;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn .arrow{transition:transform var(--dur) var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn--primary{background:var(--c-ink);color:var(--c-paper)}
.btn--primary:hover,.btn--primary:active{background:var(--c-accent);color:var(--c-ink)}
.btn--ghost{background:transparent;border:1px solid var(--c-line-strong);color:var(--c-ink)}
.btn--ghost:hover,.btn--ghost:active{background:var(--c-ink);border-color:var(--c-ink);color:var(--c-paper)}
.btn--dark{background:var(--c-accent);color:var(--c-ink)}
.btn--dark:hover,.btn--dark:active{background:var(--c-paper);color:var(--c-ink)}
.btn--dark:focus-visible{outline-color:var(--c-accent)}
.btn--sm{height:40px;padding:0 22px;font-size:.875rem}
.badge{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:var(--r-pill);
  border:1px solid var(--c-line-strong);
  font-size:.75rem;font-weight:700;letter-spacing:.06em;line-height:1.6;
  color:var(--c-ink-2);background:transparent;
}
.reveal{opacity:0;transform:translateY(12px);transition:opacity var(--dur-lg) var(--ease),transform var(--dur-lg) var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:opacity 180ms linear}
  .btn:hover .arrow{transform:none}
}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:200;
  background:var(--c-paper);border-bottom:1px solid transparent;
  transition:box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header .header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:var(--header-h);
  transition:height var(--dur) var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:0 1px 0 rgba(16,26,23,.06)}
.site-header.is-scrolled .header-inner{height:64px}
.logo{display:flex;flex-direction:column;line-height:1.1}
.logo-main{font-size:1.125rem;font-weight:800;letter-spacing:-.02em;color:var(--c-ink)}
.logo-sub{margin-top:4px;font-size:.6875rem;font-weight:500;letter-spacing:.14em;color:var(--c-muted)}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{position:relative;padding:6px 0;font-size:.9375rem;font-weight:500;color:var(--c-ink-2);transition:color var(--dur) var(--ease)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--c-ink);transition:width var(--dur) var(--ease)}
.nav-links a:hover{color:var(--c-ink)}
.nav-links a:hover::after{width:100%}
.nav-links a.is-active{color:var(--c-ink);font-weight:700}
.nav-links a.is-active::after{width:100%}
.nav-links a:focus-visible{outline-offset:4px}
.header-actions{display:flex;align-items:center;gap:12px}
.menu-toggle{
  display:none;width:40px;height:40px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid var(--c-line-strong);border-radius:var(--r-sm);
  transition:border-color var(--dur) var(--ease)
}
.menu-toggle:hover{border-color:var(--c-ink)}
.menu-toggle span{display:block;width:18px;height:1.5px;background:var(--c-ink);transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.mobile-menu{
  display:none;position:absolute;top:100%;left:0;right:0;
  background:var(--c-paper);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
  padding:8px 24px 16px;box-shadow:var(--sh-2);
}
.mobile-menu.is-open{display:block}
.mobile-menu a{display:block;padding:13px 0;border-bottom:1px solid var(--c-line);font-size:1rem;color:var(--c-ink-2)}
.mobile-menu a:last-child{border-bottom:0}
.mobile-menu a.is-active{color:var(--c-ink);font-weight:700}
@media (max-width:1023px){
  .nav-links{display:none}
  .header-actions .btn{display:none}
  .menu-toggle{display:flex}
  .logo-main{font-size:1rem}
  .logo-sub{font-size:.625rem;letter-spacing:.12em}
  body{padding-top:64px}
  .site-header .header-inner{height:64px}
}

/* ============ 页面头部 ============ */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--c-ink);color:var(--c-paper);
  padding:clamp(40px,5vw,64px) 0 clamp(56px,7vw,88px);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:url(/assets/images/backpic/back-2.png) center/cover no-repeat;
  opacity:.15;
}
.page-hero .grid-container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.8125rem;color:rgba(245,242,236,.58)}
.breadcrumb a{color:rgba(245,242,236,.58);transition:color var(--dur) var(--ease)}
.breadcrumb a:hover{color:var(--c-accent)}
.breadcrumb .sep{color:rgba(245,242,236,.32)}
.breadcrumb .current{color:var(--c-paper)}
.page-hero h1{margin:20px 0 18px;max-width:22ch;color:var(--c-paper)}
.page-hero h1 .hl{color:var(--c-accent)}
.hero-lead{max-width:62ch;margin:0;font-size:1rem;line-height:1.9;color:rgba(245,242,236,.74)}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.hero-tags .badge{border-color:rgba(198,242,74,.5);color:var(--c-accent)}

/* ============ 主体分栏 ============ */
.cat-main{padding:clamp(56px,7vw,96px) 0 clamp(64px,8vw,112px)}
.cat-layout{display:flex;flex-wrap:wrap;align-items:flex-start}
.cat-aside{width:100%}
.cat-content{width:100%}
@media (min-width:1024px){
  .cat-aside{width:27%;padding-right:44px;flex:0 0 27%}
  .cat-content{width:73%;flex:0 0 73%}
}
.toc{position:sticky;top:104px}
.toc-title{margin-bottom:16px;font-size:.75rem;font-weight:700;letter-spacing:.1em;color:var(--c-muted)}
.toc-list{display:flex;flex-direction:column}
.toc-list a{
  display:flex;align-items:baseline;gap:10px;
  padding:10px 0 10px 14px;border-left:2px solid transparent;
  font-size:.9375rem;line-height:1.6;color:var(--c-ink-3);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.toc-list a .num{font-size:.75rem;font-weight:700;letter-spacing:.06em;color:var(--c-muted);transition:color var(--dur) var(--ease)}
.toc-list a:hover{color:var(--c-ink);border-left-color:var(--c-line-strong)}
.toc-list a.is-active{color:var(--c-ink);font-weight:700;border-left-color:var(--c-accent)}
.toc-list a.is-active .num{color:var(--c-ink)}
@media (max-width:1023px){
  .cat-aside{
    position:sticky;top:64px;z-index:90;
    padding:12px 0 10px;margin-bottom:20px;
    background:var(--c-paper);border-bottom:1px solid var(--c-line);
  }
  .toc{position:static;top:auto}
  .toc-title{display:none}
  .toc-list{flex-direction:row;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
  .toc-list::-webkit-scrollbar{display:none}
  .toc-list a{
    flex:0 0 auto;white-space:nowrap;
    padding:7px 14px;border:1px solid var(--c-line);border-radius:var(--r-pill);
    font-size:.8125rem;background:var(--c-card);
  }
  .toc-list a:hover{border-color:var(--c-line-strong)}
  .toc-list a.is-active{background:var(--c-ink);border-color:var(--c-ink);color:var(--c-paper)}
  .toc-list a.is-active .num{color:var(--c-accent)}
}

/* ============ 功能模块 ============ */
.module{
  position:relative;
  padding:clamp(24px,3.2vw,40px);
  margin-bottom:24px;
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
  scroll-margin-top:120px;
}
.module:hover{border-color:var(--c-line-strong);transform:translateY(-2px)}
.module--alt{background:var(--c-paper)}
.module:last-child{margin-bottom:0}
.module-head{display:flex;align-items:flex-start;gap:16px;margin-bottom:18px}
.module-num{flex:0 0 auto;font-size:1.75rem;font-weight:800;line-height:1;color:var(--c-sand)}
.module h2{font-size:clamp(1.375rem,2.2vw,1.75rem);letter-spacing:-.02em}
.module-text{max-width:68ch;color:var(--c-ink-2);font-size:1rem;line-height:1.9}
.feature-list{display:grid;grid-template-columns:1fr;gap:10px 24px;margin-top:24px}
@media (min-width:640px){.feature-list{grid-template-columns:1fr 1fr}}
.feature-list li{position:relative;padding-left:26px;font-size:.9375rem;line-height:1.75;color:var(--c-ink-2)}
.feature-list li::before{
  content:"";position:absolute;left:2px;top:.62em;
  width:11px;height:6px;
  border-left:1.5px solid var(--c-ink);border-bottom:1.5px solid var(--c-ink);
  transform:rotate(-45deg);
}
.module-figure{margin-top:26px}
.module-figure img{
  width:100%;aspect-ratio:16/7;object-fit:cover;
  border:1px solid var(--c-line);border-radius:var(--r-sm);
  background:var(--c-sand);
}
@media (max-width:767px){.module-figure img{aspect-ratio:16/10}}

/* ============ 深色内嵌 CTA ============ */
.inline-cta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  margin:24px 0;padding:clamp(24px,3vw,36px);
  background:var(--c-ink);color:var(--c-paper);border-radius:var(--r-md);
  box-shadow:var(--sh-2);
}
.inline-cta .cta-title{margin:0 0 6px;font-size:1.125rem;font-weight:800;color:var(--c-paper);letter-spacing:-.01em}
.inline-cta p{margin:0;max-width:46ch;font-size:.9375rem;line-height:1.8;color:rgba(245,242,236,.72)}
.inline-cta .cta-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--c-accent);margin-right:8px;vertical-align:middle}

/* ============ 板块标题 ============ */
.section-head{max-width:720px;margin-bottom:clamp(28px,4vw,44px)}
.section-head h2{margin-bottom:14px}
.section-head p{margin:0;font-size:1rem;line-height:1.85;color:var(--c-muted)}

/* ============ 场景入口 ============ */
.scene-section{padding:clamp(56px,7vw,96px) 0;border-top:1px solid var(--c-line);background:var(--c-paper)}
.scene-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.scene-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.scene-card{
  display:flex;flex-direction:column;gap:10px;
  padding:28px;background:var(--c-card);
  border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.scene-card:hover{transform:translateY(-2px);border-color:var(--c-line-strong);box-shadow:var(--sh-2)}
.scene-card .idx{font-size:.75rem;font-weight:700;letter-spacing:.08em;color:var(--c-muted)}
.scene-card h3{font-size:1.0625rem;font-weight:700}
.scene-card p{margin:0;font-size:.9375rem;line-height:1.75;color:var(--c-muted)}
.scene-card .more{
  display:inline-flex;align-items:center;gap:8px;margin-top:auto;padding-top:6px;
  font-size:.875rem;font-weight:700;color:var(--c-ink);
}
.scene-card .more::after{content:"→";transition:transform var(--dur) var(--ease)}
.scene-card:hover .more::after{transform:translateX(4px)}

/* ============ FAQ ============ */
.faq-section{padding:clamp(56px,7vw,96px) 0;border-top:1px solid var(--c-line);background:var(--c-card)}
.faq-list{max-width:820px}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item:first-child{border-top:1px solid var(--c-line)}
.faq-q{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 0;text-align:left;
  font-size:1.0625rem;font-weight:700;color:var(--c-ink);line-height:1.5;
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--c-ink-3)}
.faq-icon{position:relative;flex:0 0 18px;width:18px;height:18px;transition:transform var(--dur) var(--ease)}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-ink);border-radius:1px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:1.5px}
.faq-icon::after{width:1.5px;height:14px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--dur-lg) var(--ease)}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a-inner{max-width:760px;padding:0 0 22px;font-size:.9375rem;line-height:1.85;color:var(--c-ink-3)}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:var(--c-paper);padding:clamp(48px,6vw,80px) 0 0}
.site-footer .logo-main{color:var(--c-paper)}
.site-footer .logo-sub{color:rgba(245,242,236,.5)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px}}
.footer-brand p{margin:16px 0 20px;max-width:38ch;font-size:.9375rem;line-height:1.8;color:rgba(245,242,236,.66)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.site-footer .badge{border-color:rgba(245,242,236,.28);color:rgba(245,242,236,.72)}
.footer-col h4{
  display:flex;align-items:center;gap:8px;
  margin:0 0 16px;font-size:.8125rem;font-weight:700;letter-spacing:.08em;color:var(--c-paper);
}
.footer-col h4::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:.9375rem;color:rgba(245,242,236,.66);transition:color var(--dur) var(--ease)}
.footer-links a:hover{color:var(--c-accent)}
.footer-info{display:flex;flex-direction:column;gap:12px;font-size:.9375rem;line-height:1.7;color:rgba(245,242,236,.66)}
.footer-info strong{display:block;font-size:.8125rem;font-weight:700;letter-spacing:.04em;color:var(--c-paper)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;
  margin-top:clamp(32px,4vw,56px);padding:24px 0;
  border-top:1px solid rgba(245,242,236,.16);
  font-size:.8125rem;color:rgba(245,242,236,.5);
}

/* ============ 移动端底部 Tab ============ */
.tab-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:150;
  display:none;background:rgba(245,242,236,.98);
  border-top:1px solid var(--c-line);
  padding-bottom:env(safe-area-inset-bottom);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.tab-item{
  position:relative;flex:1 1 0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:var(--tab-h);font-size:10px;line-height:1.2;color:var(--c-muted);
  transition:color var(--dur) var(--ease);
}
.tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tab-item.is-active{color:var(--c-ink);font-weight:700}
.tab-item.is-active svg{fill:currentColor;fill-opacity:.14}
.tab-item.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;background:var(--c-accent);
}
@media (max-width:1023px){
  .tab-bar{display:flex}
  body{padding-bottom:calc(var(--tab-h) + env(safe-area-inset-bottom) + 8px)}
  html{scroll-padding-top:150px}
}

/* roulang page: category2 */
:root{
  --c-ink:#101A17;
  --c-ink-2:#2A3733;
  --c-ink-3:#46534E;
  --c-paper:#F5F2EC;
  --c-card:#FFFFFF;
  --c-sand:#E7DFD2;
  --c-accent:#C6F24A;
  --c-alert:#E2542C;
  --c-muted:#6E7A75;
  --c-line:rgba(16,26,23,0.12);
  --c-line-strong:rgba(16,26,23,0.24);
  --c-line-invert:rgba(245,242,236,0.16);
  --r-sm:6px;
  --r-md:12px;
  --r-pill:999px;
  --sh-1:0 1px 0 rgba(16,26,23,.04),0 8px 24px -14px rgba(16,26,23,.18);
  --sh-2:0 24px 60px -32px rgba(16,26,23,.32);
  --sp-1:8px;--sp-2:16px;--sp-3:24px;--sp-4:32px;
  --sp-5:48px;--sp-6:64px;--sp-7:96px;--sp-8:128px;
  --ease:cubic-bezier(.22,1,.36,1);
  --dur:240ms;
  --dur-lg:600ms;
  --font: "Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:1rem;
  line-height:1.9;
  font-weight:400;
  color:var(--c-ink);
  background:var(--c-paper);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:inherit;text-decoration:none;}
a:hover{color:inherit;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
input,textarea,select{font:inherit;color:inherit;}
::selection{background:var(--c-ink);color:var(--c-paper);}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--c-sand);}
::-webkit-scrollbar-thumb{background:var(--c-ink-3);border-radius:var(--r-pill);}
::-webkit-scrollbar-thumb:hover{background:var(--c-ink);}
:focus-visible{outline:2px solid var(--c-ink);outline-offset:2px;}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--c-ink);color:var(--c-paper);
  padding:12px 20px;border-radius:0 0 var(--r-sm) 0;font-size:.875rem;
}
.skip-link:focus{left:0;}

.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;}
@media screen and (max-width:520px){
  .grid-container{padding-left:20px;padding-right:20px;}
}

/* ---------- 排版 ---------- */
h1{
  font-size:clamp(2.25rem,5vw,4rem);
  font-weight:800;
  line-height:1.1;
  letter-spacing:-.03em;
}
h2{
  font-size:clamp(1.75rem,3vw,2.5rem);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.02em;
}
h3{font-size:1.25rem;font-weight:700;line-height:1.4;letter-spacing:-.01em;}
h4{font-size:1.0625rem;font-weight:700;line-height:1.5;}
p{max-width:68ch;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.75rem;font-weight:700;letter-spacing:.14em;
  color:var(--c-muted);text-transform:uppercase;
  margin-bottom:var(--sp-2);
}
.eyebrow::before{
  content:"";width:22px;height:2px;background:var(--c-alert);display:block;
}
.section-lead{
  margin-top:var(--sp-2);
  font-size:.9375rem;line-height:1.75;color:var(--c-muted);max-width:62ch;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 28px;
  border-radius:var(--r-pill);
  font-size:.9375rem;font-weight:700;letter-spacing:.01em;
  background:var(--c-ink);color:var(--c-paper);
  border:1px solid var(--c-ink);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
  white-space:nowrap;
}
.btn .btn-arrow{display:inline-block;transition:transform var(--dur) var(--ease);font-weight:700;}
.btn:hover{background:var(--c-accent);color:var(--c-ink);border-color:var(--c-accent);}
.btn:hover .btn-arrow{transform:translateX(4px);}
.btn:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 22px;font-size:.8125rem;}
.btn-ghost{
  background:transparent;color:var(--c-ink);border:1px solid var(--c-line-strong);
}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-paper);border-color:var(--c-ink);}
.btn-ghost:hover .btn-arrow{transform:translateX(4px);}
.btn-accent{background:var(--c-accent);color:var(--c-ink);border-color:var(--c-accent);}
.btn-accent:hover{background:var(--c-paper);color:var(--c-ink);border-color:var(--c-paper);}
.btn-invert{background:var(--c-paper);color:var(--c-ink);border-color:var(--c-paper);}
.btn-invert:hover{background:var(--c-accent);border-color:var(--c-accent);color:var(--c-ink);}

.text-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.875rem;font-weight:700;color:var(--c-ink);
  position:relative;padding-bottom:2px;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--c-ink);transform:scaleX(0);transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.text-link:hover::after{transform:scaleX(1);}
.text-link span{transition:transform var(--dur) var(--ease);}
.text-link:hover span{transform:translateX(4px);}

/* ---------- 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  border:1px solid var(--c-line-strong);
  font-size:.75rem;font-weight:700;letter-spacing:.06em;
  color:var(--c-ink-2);background:transparent;
  white-space:nowrap;
}
.badge-alert{border-color:rgba(226,84,44,.55);color:var(--c-alert);}
.badge-key{border-color:rgba(16,26,23,.4);color:var(--c-ink);}
.badge-accent{border-color:rgba(198,242,74,.6);color:var(--c-accent);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:var(--sp-3);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  color:var(--c-paper);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
  border-bottom:1px solid transparent;
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);
  height:80px;
  transition:height var(--dur) var(--ease);
}
.logo{display:inline-flex;flex-direction:column;gap:2px;line-height:1.1;}
.logo-main{
  font-size:1.1875rem;font-weight:800;letter-spacing:-.02em;
  color:var(--c-paper);
  transition:color var(--dur) var(--ease);
}
.logo-main span{color:inherit;}
.logo-sub{
  font-size:.6875rem;font-weight:500;letter-spacing:.16em;
  color:rgba(245,242,236,.6);
  transition:color var(--dur) var(--ease);
}
.nav-links{display:flex;align-items:center;gap:var(--sp-4);}
.nav-links a{
  position:relative;
  font-size:.9375rem;font-weight:500;
  color:rgba(245,242,236,.82);
  padding:6px 0;
  transition:color var(--dur) var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--c-accent);transform:scaleX(0);transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.nav-links a:hover{color:var(--c-paper);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--c-paper);font-weight:700;}
.nav-links a.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:var(--sp-2);}
.site-header .btn-cta{
  background:var(--c-accent);color:var(--c-ink);border-color:var(--c-accent);
}
.site-header .btn-cta:hover{background:var(--c-paper);border-color:var(--c-paper);color:var(--c-ink);}

.site-header.is-scrolled{
  background:rgba(245,242,236,.96);
  backdrop-filter:saturate(150%) blur(10px);
  color:var(--c-ink);
  border-bottom-color:var(--c-line);
  box-shadow:0 10px 30px -24px rgba(16,26,23,.5);
}
.site-header.is-scrolled .header-inner{height:64px;}
.site-header.is-scrolled .logo-main{color:var(--c-ink);}
.site-header.is-scrolled .logo-sub{color:var(--c-muted);}
.site-header.is-scrolled .nav-links a{color:var(--c-ink-3);}
.site-header.is-scrolled .nav-links a:hover,
.site-header.is-scrolled .nav-links a.is-active{color:var(--c-ink);}
.site-header.is-scrolled .nav-links a::after{background:var(--c-ink);}
.site-header.is-scrolled .btn-cta{background:var(--c-ink);color:var(--c-paper);border-color:var(--c-ink);}
.site-header.is-scrolled .btn-cta:hover{background:var(--c-accent);color:var(--c-ink);border-color:var(--c-accent);}
.site-header.is-scrolled .nav-toggle{border-color:var(--c-line-strong);}

.nav-toggle{
  display:none;width:40px;height:40px;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid rgba(245,242,236,.4);border-radius:var(--r-sm);
  color:inherit;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);}
.site-header.menu-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.site-header.menu-open .nav-toggle span:nth-child(2){opacity:0;}
.site-header.menu-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-menu{
  display:none;
  background:var(--c-paper);
  border-top:1px solid var(--c-line);
  padding:8px 20px 22px;
}
.mobile-menu a{
  display:block;
  padding:14px 0;
  font-size:1rem;font-weight:600;
  color:var(--c-ink-2);
  border-bottom:1px solid var(--c-line);
}
.mobile-menu a:last-child{border-bottom:0;}
.mobile-menu a.is-active{color:var(--c-ink);}
.mobile-menu a.is-active::after{content:"当前";margin-left:10px;font-size:.6875rem;letter-spacing:.12em;color:var(--c-alert);}

/* ---------- 首屏 ---------- */
.page-hero{
  position:relative;
  padding:168px 0 88px;
  background:var(--c-ink);
  color:var(--c-paper);
  overflow:hidden;
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center right;
  opacity:.42;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(16,26,23,.96) 0%,rgba(16,26,23,.86) 46%,rgba(16,26,23,.42) 100%);
}
.page-hero .grid-container{position:relative;z-index:2;}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:.8125rem;color:rgba(245,242,236,.62);
  margin-bottom:var(--sp-4);
}
.crumbs a{color:rgba(245,242,236,.62);transition:color var(--dur) var(--ease);}
.crumbs a:hover{color:var(--c-accent);}
.crumbs em{font-style:normal;color:var(--c-paper);font-weight:700;}
.page-hero h1{
  max-width:19ch;
  color:var(--c-paper);
}
.page-hero .hero-lead{
  margin-top:var(--sp-3);
  max-width:56ch;
  font-size:1.0625rem;line-height:1.85;
  color:rgba(245,242,236,.78);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--sp-4);}
.hero-tags .badge{border-color:rgba(198,242,74,.5);color:var(--c-accent);}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;
  margin-top:var(--sp-6);
  border-top:1px solid var(--c-line-invert);
}
.hero-stat{
  padding:var(--sp-3) var(--sp-3) 0 0;
  border-right:1px solid var(--c-line-invert);
}
.hero-stat:last-child{border-right:0;padding-right:0;}
.hero-stat .num{
  font-size:clamp(1.5rem,2.4vw,2rem);
  font-weight:800;line-height:1.1;letter-spacing:-.02em;
  color:var(--c-accent);
  font-variant-numeric:tabular-nums;
}
.hero-stat .lab{
  display:block;margin-top:8px;
  font-size:.75rem;font-weight:700;letter-spacing:.08em;
  color:rgba(245,242,236,.6);
}

/* ---------- 板块通用 ---------- */
main > section{border-top:1px solid var(--c-line);}
main > section:first-child{border-top:0;}
.section{padding:clamp(72px,8vw,128px) 0;}
.section-head{max-width:760px;}
.section-head h2{margin-top:6px;}

/* ---------- 场景区块 ---------- */
.scenes{padding-top:clamp(72px,8vw,128px);padding-bottom:0;background:var(--c-paper);}
.scenes .section-head{margin:0 auto var(--sp-7);}
.scene-block{
  position:relative;
  min-height:560px;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
  border-top:1px solid var(--c-line);
}
.scene-block::before{
  content:"";position:absolute;inset:0;
  background-image:var(--scene-img);
  background-size:cover;background-position:center;
}
.scene-block::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(16,26,23,.78) 0%,rgba(16,26,23,.4) 52%,rgba(16,26,23,.12) 100%);
}
.scene-block.is-right::after{
  background:linear-gradient(270deg,rgba(16,26,23,.78) 0%,rgba(16,26,23,.4) 52%,rgba(16,26,23,.12) 100%);
}
.scene-frame{
  position:relative;z-index:2;
  width:100%;max-width:1200px;
  padding:56px 24px;
  display:flex;justify-content:flex-start;
}
.scene-block.is-right .scene-frame{justify-content:flex-end;}
.scene-card{
  width:min(520px,100%);
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-2);
  padding:32px;
}
.scene-no{
  display:block;
  font-size:1.75rem;font-weight:800;line-height:1;
  color:var(--c-sand);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  margin-bottom:var(--sp-2);
}
.scene-card h3{
  margin:var(--sp-3) 0 var(--sp-2);
  font-size:clamp(1.25rem,1.7vw,1.5rem);
  letter-spacing:-.02em;
}
.scene-card p{
  font-size:.9375rem;line-height:1.8;color:var(--c-ink-3);
  margin-bottom:12px;max-width:none;
}
.scene-card .text-link{margin-top:var(--sp-3);}

/* ---------- 时间轴 ---------- */
.section-flow{background:var(--c-card);}
.flow-track{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:var(--sp-4);
  position:relative;
  margin-top:var(--sp-7);
}
.flow-track::before{
  content:"";position:absolute;left:0;right:0;top:24px;height:1px;
  background:var(--c-line-strong);
}
.flow-node{position:relative;padding-top:64px;}
.flow-dot{
  position:absolute;top:0;left:0;
  width:48px;height:48px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-accent);color:var(--c-ink);
  font-size:.875rem;font-weight:800;letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
  border:4px solid var(--c-card);
  box-shadow:0 0 0 1px var(--c-line-strong);
}
.flow-node h3{margin-bottom:8px;font-size:1.0625rem;}
.flow-node p{font-size:.9375rem;line-height:1.75;color:var(--c-muted);}

/* ---------- 引述 ---------- */
.section-quotes{background:var(--c-paper);}
.quote-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:var(--sp-3);
  margin-top:var(--sp-6);
}
.quote-card{
  position:relative;
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:36px 32px 28px;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.quote-card:hover{transform:translateY(-2px);border-color:var(--c-line-strong);box-shadow:var(--sh-2);}
.quote-mark{
  position:absolute;top:10px;left:26px;
  font-size:3.5rem;line-height:1;font-weight:800;
  color:var(--c-sand);
}
.quote-card blockquote{
  position:relative;
  font-size:1.0625rem;line-height:1.85;color:var(--c-ink-2);
  padding-top:var(--sp-2);
}
.quote-card figcaption{
  margin-top:var(--sp-4);
  padding-top:var(--sp-3);
  border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:var(--sp-3);
}
.quote-stats{display:flex;gap:var(--sp-4);}
.quote-stats dt{
  font-size:.75rem;font-weight:700;letter-spacing:.08em;color:var(--c-muted);
}
.quote-stats dd{
  margin:4px 0 0;
  font-size:1.375rem;font-weight:800;line-height:1.1;letter-spacing:-.02em;
  color:var(--c-ink);font-variant-numeric:tabular-nums;
}

/* ---------- 深色 CTA 横条 ---------- */
.mid-cta{
  background:var(--c-ink);
  color:var(--c-paper);
  border-top:0;
}
.mid-cta .grid-container{
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);
  padding-top:clamp(40px,5vw,64px);
  padding-bottom:clamp(40px,5vw,64px);
  flex-wrap:wrap;
}
.mid-cta .cta-copy{display:flex;align-items:center;gap:var(--sp-3);flex-wrap:wrap;}
.mid-cta .dot{width:10px;height:10px;border-radius:50%;background:var(--c-accent);display:block;flex:0 0 auto;}
.mid-cta strong{
  font-size:clamp(1.125rem,2vw,1.5rem);
  font-weight:800;letter-spacing:-.01em;
}
.mid-cta .badge{border-color:rgba(198,242,74,.5);color:var(--c-accent);}

/* ---------- FAQ ---------- */
.section-faq{background:var(--c-card);}
.faq-accordion{
  background:transparent;
  margin:var(--sp-6) 0 0;
  max-width:820px;
  border:0;
}
.faq-accordion .accordion-item{
  background:transparent;
  border:0;
  border-top:1px solid var(--c-line);
}
.faq-accordion .accordion-item:last-child{border-bottom:1px solid var(--c-line);}
.faq-accordion .accordion-title{
  display:block;
  position:relative;
  padding:22px 52px 22px 0;
  margin:0;
  border:0;
  background:transparent;
  color:var(--c-ink);
  font-size:1.0625rem;font-weight:700;line-height:1.5;
  transition:color var(--dur) var(--ease);
}
.faq-accordion .accordion-title:hover{color:var(--c-ink-3);}
.faq-accordion .accordion-title::before{
  content:"+";
  position:absolute;right:10px;top:50%;
  transform:translateY(-50%);
  font-size:1.5rem;font-weight:400;line-height:1;
  color:var(--c-ink);
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);
}
.faq-accordion .accordion-title[aria-expanded="true"]::before{
  transform:translateY(-50%) rotate(45deg);
  color:var(--c-alert);
}
.faq-accordion .accordion-content{
  display:none;
  padding:0 52px 24px 0;
  border:0;
  background:transparent;
  color:var(--c-ink-3);
  font-size:.9375rem;line-height:1.85;
}
.faq-accordion .accordion-content p{max-width:66ch;}
.faq-accordion .accordion-content.is-open{display:block;}

/* ---------- 底部 CTA ---------- */
.final-cta{
  background:var(--c-ink);
  color:var(--c-paper);
  border-top:0;
}
.final-cta .grid-container{
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-5);
  padding-top:clamp(56px,6vw,88px);
  padding-bottom:clamp(56px,6vw,88px);
  flex-wrap:wrap;
}
.final-cta h2{color:var(--c-paper);max-width:20ch;}
.final-cta p{
  margin-top:var(--sp-2);
  color:rgba(245,242,236,.7);
  font-size:.9375rem;line-height:1.8;
  max-width:52ch;
}
.final-cta .hero-tags{margin-top:var(--sp-3);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-ink);
  color:var(--c-paper);
  border-top:1px solid var(--c-line-invert);
  padding-top:clamp(56px,6vw,80px);
  padding-bottom:32px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.1fr;
  gap:var(--sp-5);
  padding-bottom:var(--sp-6);
}
.footer-brand .logo{margin-bottom:var(--sp-3);}
.footer-brand .logo-main{color:var(--c-paper);}
.footer-brand .logo-sub{color:rgba(245,242,236,.55);}
.footer-brand p{
  font-size:.875rem;line-height:1.8;
  color:rgba(245,242,236,.62);
  max-width:36ch;
}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:var(--sp-3);}
.footer-tags .badge{border-color:rgba(245,242,236,.28);color:rgba(245,242,236,.78);}
.footer-col h4{
  position:relative;
  font-size:.8125rem;font-weight:700;letter-spacing:.12em;
  color:var(--c-paper);
  padding-left:14px;margin-bottom:var(--sp-3);
}
.footer-col h4::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--c-accent);
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  font-size:.875rem;color:rgba(245,242,236,.62);
  transition:color var(--dur) var(--ease);
  width:fit-content;
}
.footer-links a:hover{color:var(--c-accent);}
.footer-info{display:flex;flex-direction:column;gap:12px;font-size:.875rem;color:rgba(245,242,236,.62);line-height:1.7;}
.footer-info strong{color:var(--c-paper);font-weight:700;font-size:.8125rem;letter-spacing:.06em;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:var(--sp-3);
  border-top:1px solid var(--c-line-invert);
  font-size:.8125rem;color:rgba(245,242,236,.5);
}

/* ---------- 移动端底部 Tab ---------- */
.tab-bar{display:none;}
@media screen and (max-width:1023px){
  .tab-bar{
    display:flex;
    position:fixed;left:0;right:0;bottom:0;z-index:90;
    height:64px;
    background:rgba(245,242,236,.97);
    backdrop-filter:saturate(150%) blur(10px);
    border-top:1px solid var(--c-line);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .tab-item{
    flex:1 1 0;
    position:relative;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    color:var(--c-muted);
    font-size:10px;font-weight:600;letter-spacing:.02em;
    transition:color var(--dur) var(--ease);
  }
  .tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
  .tab-item.is-active{color:var(--c-ink);}
  .tab-item.is-active svg{stroke:var(--c-ink);fill:rgba(198,242,74,.28);}
  .tab-item.is-active::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:34px;height:2px;background:var(--c-accent);border-radius:0 0 2px 2px;
  }
  .tab-item:active{background:rgba(16,26,23,.04);}
  body{padding-bottom:76px;}
}

/* ---------- 动效 ---------- */
.reveal{opacity:1;transform:none;}
.js .reveal{opacity:0;transform:translateY(12px);}
.js .reveal.is-in{
  opacity:1;transform:none;
  transition:opacity var(--dur-lg) var(--ease),transform var(--dur-lg) var(--ease);
}
.hero-anim{opacity:1;transform:none;}
.js .hero-anim{opacity:0;transform:translateY(12px);animation:heroUp 620ms var(--ease) forwards;}
.js .hero-anim:nth-child(1){animation-delay:0ms;}
.js .hero-anim:nth-child(2){animation-delay:80ms;}
.js .hero-anim:nth-child(3){animation-delay:160ms;}
.js .hero-anim:nth-child(4){animation-delay:240ms;}
.js .hero-anim:nth-child(5){animation-delay:320ms;}
@keyframes heroUp{to{opacity:1;transform:none;}}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .js .reveal,.js .hero-anim{opacity:1 !important;transform:none !important;animation:none !important;}
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1023px){
  .nav-links{display:none;}
  .header-actions .btn-cta{display:none;}
  .nav-toggle{display:flex;}
  .site-header{
    background:rgba(245,242,236,.97);
    color:var(--c-ink);
    border-bottom:1px solid var(--c-line);
  }
  .site-header .logo-main{color:var(--c-ink);}
  .site-header .logo-sub{color:var(--c-muted);}
  .site-header .nav-toggle{border-color:var(--c-line-strong);}
  .header-inner{height:64px;}
  .site-header.menu-open .mobile-menu{display:block;}
  .page-hero{padding-top:120px;}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .hero-stat{border-right:1px solid var(--c-line-invert);}
  .hero-stat:nth-child(2n){border-right:0;padding-right:0;}
  .hero-stat:nth-child(n+3){margin-top:var(--sp-3);}
  .flow-track{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:var(--sp-6);}
  .flow-track::before{display:none;}
  .flow-node{padding-top:60px;}
  .quote-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-5);}
}

@media screen and (max-width:767px){
  .page-hero{padding:112px 0 64px;}
  .page-hero h1{max-width:none;}
  .section{padding:56px 0;}
  .scenes{padding-top:56px;}
  .scenes .section-head{margin-bottom:var(--sp-5);}
  .scene-block{
    display:block;min-height:0;
    background:var(--c-ink);
  }
  .scene-block::before{position:static;display:block;height:220px;}
  .scene-block::after{display:none;}
  .scene-frame{padding:20px;justify-content:flex-start;}
  .scene-block.is-right .scene-frame{justify-content:flex-start;}
  .scene-card{width:100%;padding:24px;margin-top:16px;}
  .flow-track{grid-template-columns:1fr;row-gap:0;}
  .flow-track::before{
    display:block;
    top:0;bottom:0;left:23px;right:auto;
    width:1px;height:auto;
    background:var(--c-line-strong);
  }
  .flow-node{padding:0 0 32px 64px;}
  .flow-node:last-child{padding-bottom:0;}
  .flow-dot{top:0;left:0;border-color:var(--c-card);}
  .quote-card{padding:28px 22px 22px;}
  .quote-mark{left:16px;}
  .quote-card figcaption{flex-direction:column;align-items:flex-start;}
  .mid-cta .grid-container{flex-direction:column;align-items:flex-start;}
  .final-cta .grid-container{flex-direction:column;align-items:flex-start;}
  .final-cta h2{max-width:none;}
  .footer-grid{grid-template-columns:1fr;gap:var(--sp-4);}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-accordion .accordion-title{padding-right:42px;font-size:1rem;}
  .faq-accordion .accordion-content{padding-right:0;}
}

@media screen and (max-width:520px){
  .hero-stats{grid-template-columns:1fr;}
  .hero-stat{border-right:0;padding-right:0;padding-bottom:var(--sp-3);}
  .hero-stat:last-child{padding-bottom:0;}
  .hero-stat:nth-child(n+3){margin-top:0;}
  .scene-card{padding:20px;}
  .btn{height:44px;padding:0 22px;font-size:.875rem;}
  .footer-tags .badge{font-size:.6875rem;}
}