/* roulang page: index */
:root{
  --c-primary:#0F6F6B;
  --c-primary-deep:#0A4F4C;
  --c-primary-soft:#E3F1EF;
  --c-accent:#E4772F;
  --c-accent-hover:#CF6626;
  --c-accent-soft:#FDEEDF;
  --c-ink:#14201F;
  --c-body:#3D4A48;
  --c-muted:#7C8A88;
  --c-line:#DCE4E1;
  --c-bg:#F7F8F5;
  --c-surface:#FFFFFF;
  --c-dark:#12211F;
  --c-success:#2E8B57;
  --c-danger:#C0392B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,32,31,.06);
  --sh-2:0 8px 24px -12px rgba(20,32,31,.18);
  --sh-3:0 18px 40px -20px rgba(10,79,76,.28);
  --ease:160ms ease-out;
  --ease-slow:220ms ease-out;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--c-primary-deep);text-decoration:underline;text-underline-offset:4px}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:600;letter-spacing:.5px}
h1{font-weight:700}
p{margin:0}
figure{margin:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
::selection{background:var(--c-primary-soft);color:var(--c-primary-deep)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.ky-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ===== 顶部导航 ===== */
.ky-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,248,245,.92);
  -webkit-backdrop-filter:saturate(180%) blur(10px);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--ease-slow);
}
.ky-header.is-scrolled{box-shadow:var(--sh-1)}
.ky-header-inner{display:flex;align-items:center;gap:24px;min-height:68px}
.ky-logo{
  display:inline-flex;align-items:center;gap:8px;
  font-size:18px;font-weight:700;letter-spacing:.5px;
  color:var(--c-primary);white-space:nowrap;
}
.ky-logo:hover{color:var(--c-primary-deep);text-decoration:none}
.ky-logo svg{width:26px;height:26px;flex:none}
.ky-menu{display:flex;align-items:center;gap:2px}
.ky-menu a{
  position:relative;display:inline-flex;align-items:center;
  height:68px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--c-body);
}
.ky-menu a:hover{color:var(--c-primary);text-decoration:none}
.ky-menu a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:14px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;
  transition:transform var(--ease-slow);
}
.ky-menu a:hover::after,.ky-menu a.is-active::after{transform:scaleX(1)}
.ky-menu a.is-active{color:var(--c-primary);font-weight:600}
.ky-nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.ky-search{position:relative;width:240px}
.ky-search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--c-muted);pointer-events:none}
.ky-search input{
  width:100%;height:40px;padding:0 16px 0 40px;
  border:1px solid var(--c-line);border-radius:var(--r-pill);
  background:var(--c-surface);font-size:14px;color:var(--c-ink);
  outline:none;transition:border-color var(--ease),box-shadow var(--ease);
}
.ky-search input::placeholder{color:var(--c-muted)}
.ky-search input:focus{border-color:var(--c-primary);box-shadow:var(--sh-1)}
.ky-login{font-size:15px;color:var(--c-body);padding:8px 4px}
.ky-login:hover{color:var(--c-primary);text-decoration:none}
.ky-burger{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:var(--r-sm);color:var(--c-ink);
}
.ky-burger:hover{background:var(--c-primary-soft)}

/* ===== 按钮 ===== */
.ky-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.3px;white-space:nowrap;
  transition:background-color var(--ease),color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.ky-btn:hover{text-decoration:none}
.ky-btn-accent{background:var(--c-accent);color:#fff}
.ky-btn-accent:hover{background:var(--c-accent-hover);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px)}
.ky-btn-primary{background:var(--c-primary);color:#fff}
.ky-btn-primary:hover{background:var(--c-primary-deep);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px)}
.ky-btn-ghost{background:var(--c-surface);color:var(--c-primary);border:1px solid var(--c-primary)}
.ky-btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-deep)}
.ky-btn-ghost-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5)}
.ky-btn-ghost-light:hover{background:rgba(255,255,255,.14);color:#fff}
.ky-btn-sm{height:36px;padding:0 16px;font-size:14px}
.ky-btn-block{width:100%}
.ky-btn:disabled,.ky-btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.ky-icon-btn{
  width:40px;height:40px;border-radius:var(--r-pill);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--c-primary);background:var(--c-surface);border:1px solid var(--c-line);
  transition:background-color var(--ease),border-color var(--ease),transform var(--ease);
}
.ky-icon-btn:hover{background:var(--c-primary-soft);border-color:var(--c-primary)}
.ky-icon-btn svg{width:18px;height:18px}

/* ===== 徽章与标签 ===== */
.ky-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;font-weight:500;line-height:1;
  background:var(--c-primary-soft);color:var(--c-primary);white-space:nowrap;
}
.ky-badge-accent{background:var(--c-accent-soft);color:var(--c-accent)}
.ky-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.ky-tags li{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  border-radius:var(--r-pill);font-size:13px;
  background:var(--c-primary-soft);color:var(--c-primary);
}
.ky-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--c-muted);font-variant-numeric:tabular-nums}
.ky-meta .ky-dot{width:3px;height:3px;border-radius:50%;background:var(--c-line)}

/* ===== Hero ===== */
.ky-hero{position:relative;overflow:hidden;padding:72px 0 64px;background:linear-gradient(180deg,#F1F7F5 0%,var(--c-bg) 100%)}
.ky-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(15,111,107,.14) 1px,transparent 1px);
  background-size:22px 22px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 78%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 78%);
  opacity:.7;pointer-events:none;
}
.ky-hero-inner{position:relative;display:grid;grid-template-columns:6fr 5fr;gap:56px;align-items:center}
.ky-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:500;letter-spacing:1px;color:var(--c-accent);
  text-transform:none;margin-bottom:16px;
}
.ky-eyebrow::before{content:"";width:22px;height:1px;background:var(--c-accent);display:inline-block}
.ky-hero h1{font-size:44px;line-height:1.28;letter-spacing:.5px;margin-bottom:16px}
.ky-hero-sub{font-size:17px;line-height:1.85;color:var(--c-body);max-width:30em}
.ky-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.ky-hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-3);background:var(--c-primary-soft)}
.ky-hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.ky-media-fallback{background:var(--c-primary-soft);position:relative}
.ky-media-fallback::after{
  content:"开云kaiyun网站";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:var(--c-primary);font-weight:600;letter-spacing:2px;
}

/* ===== 板块通用 ===== */
.ky-section{padding:80px 0}
.ky-section-alt{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.ky-section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.ky-section-head h2{
  position:relative;font-size:30px;line-height:1.35;padding-left:16px;
}
.ky-section-head h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--c-primary);
}
.ky-section-desc{margin-top:10px;font-size:15px;color:var(--c-muted);max-width:56em}
.ky-link-more{font-size:14px;font-weight:500;color:var(--c-primary);white-space:nowrap}
.ky-link-more::after{content:" →";transition:transform var(--ease)}

/* ===== 合集目录 ===== */
.ky-toc{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 32px}
.ky-toc-item{
  display:flex;align-items:center;gap:16px;
  padding:16px 18px;border-radius:var(--r-md);
  border:1px solid var(--c-line);background:var(--c-surface);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease),background-color var(--ease);
}
.ky-toc-item:hover{
  text-decoration:none;border-color:var(--c-primary);
  box-shadow:var(--sh-2);transform:translateY(-2px);
}
.ky-toc-num{
  font-size:15px;font-weight:700;color:var(--c-accent);
  font-variant-numeric:tabular-nums;letter-spacing:1px;flex:none;
}
.ky-toc-text{flex:1;min-width:0}
.ky-toc-text strong{display:block;font-size:16px;font-weight:600;color:var(--c-ink);letter-spacing:.5px}
.ky-toc-text span{display:block;font-size:13px;color:var(--c-muted);margin-top:2px}
.ky-toc-arrow{flex:none;color:var(--c-primary);transition:transform var(--ease)}
.ky-toc-item:hover .ky-toc-arrow{transform:translateX(4px)}

/* ===== 精选错落栅格 ===== */
.ky-pick-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.ky-pick-main{grid-column:span 7}
.ky-pick-side{grid-column:span 5;display:grid;gap:24px;align-content:start}
.ky-card{
  display:block;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);overflow:hidden;color:inherit;
  transition:transform var(--ease-slow),box-shadow var(--ease-slow),border-color var(--ease-slow);
}
.ky-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9D8D4}
.ky-card:hover h3{color:var(--c-primary)}
.ky-card-cover{position:relative;overflow:hidden;background:var(--c-primary-soft)}
.ky-card-cover img{width:100%;object-fit:cover;transition:transform var(--ease-slow)}
.ky-card:hover .ky-card-cover img{transform:scale(1.03)}
.ky-card-main .ky-card-cover img{aspect-ratio:16/9}
.ky-card-body{padding:20px 22px 22px}
.ky-card-body h3{font-size:20px;line-height:1.5;margin-bottom:10px}
.ky-card-body p{font-size:14px;line-height:1.8;color:var(--c-body);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ky-card-main .ky-card-body h3{font-size:23px}
.ky-card-side{display:grid;grid-template-columns:132px 1fr;align-items:stretch}
.ky-card-side .ky-card-cover{height:100%}
.ky-card-side .ky-card-cover img{height:100%;aspect-ratio:4/3}
.ky-card-side .ky-card-body{padding:16px 18px;display:flex;flex-direction:column;gap:6px}
.ky-card-side .ky-card-body h3{font-size:17px;margin-bottom:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ky-card-side .ky-card-body p{font-size:13px;margin-bottom:2px}
.ky-card-foot{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:12px}

/* ===== 最新信息列表 ===== */
.ky-list{display:grid;gap:4px}
.ky-list-item{
  display:grid;grid-template-columns:200px 1fr;gap:24px;align-items:center;
  padding:16px;border-radius:var(--r-md);color:inherit;
  border-bottom:1px solid var(--c-line);
  transition:background-color var(--ease),transform var(--ease);
}
.ky-list-item:hover{text-decoration:none;background:rgba(227,241,239,.6);transform:translateY(-1px)}
.ky-list-item:hover h3{color:var(--c-primary)}
.ky-list-thumb{border-radius:12px;overflow:hidden;background:var(--c-primary-soft)}
.ky-list-thumb img{width:200px;height:132px;object-fit:cover}
.ky-list-body{min-width:0}
.ky-list-body h3{font-size:18px;line-height:1.5;margin-bottom:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ky-list-body p{
  font-size:14px;color:var(--c-body);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.ky-list-meta{display:flex;align-items:center;gap:12px;margin-top:12px;font-size:13px;color:var(--c-muted);font-variant-numeric:tabular-nums}
.ky-empty{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:56px 24px;border-radius:var(--r-md);
  background:var(--c-primary-soft);text-align:center;color:var(--c-primary-deep);
}
.ky-empty svg{width:44px;height:44px;color:var(--c-primary);opacity:.8}
.ky-empty p{font-size:15px}

/* ===== 数据带 ===== */
.ky-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.ky-fact{
  padding:28px 24px;border-radius:var(--r-md);
  background:var(--c-bg);border:1px solid var(--c-line);
}
.ky-fact-num{font-size:34px;font-weight:700;color:var(--c-primary);line-height:1.2;font-variant-numeric:tabular-nums;letter-spacing:.5px}
.ky-fact-num small{font-size:16px;font-weight:600;margin-left:2px}
.ky-fact p{margin-top:8px;font-size:14px;color:var(--c-muted);line-height:1.7}

/* ===== 横滑推荐 ===== */
.ky-rail-wrap{position:relative}
.ky-rail{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 18px;scrollbar-width:thin;
}
.ky-rail::-webkit-scrollbar{height:6px}
.ky-rail::-webkit-scrollbar-thumb{background:var(--c-line);border-radius:var(--r-pill)}
.ky-rail-card{
  flex:0 0 260px;scroll-snap-align:start;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  overflow:hidden;color:inherit;
  transition:transform var(--ease-slow),box-shadow var(--ease-slow),border-color var(--ease-slow);
}
.ky-rail-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9D8D4}
.ky-rail-card:hover h3{color:var(--c-primary)}
.ky-rail-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--c-primary-soft)}
.ky-rail-body{padding:16px 18px 18px}
.ky-rail-body h3{font-size:16px;line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ky-rail-body p{font-size:13px;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ky-rail-nav{position:absolute;top:38%;width:40px;height:40px;z-index:2}
.ky-rail-nav.prev{left:-14px}
.ky-rail-nav.next{right:-14px}

/* ===== 深色 CTA ===== */
.ky-cta{
  position:relative;overflow:hidden;
  background:var(--c-dark);border-radius:var(--r-lg);
  padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.ky-cta::after{
  content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;
  border:1px solid rgba(255,255,255,.14);border-radius:50%;pointer-events:none;
}
.ky-cta h2{color:#fff;font-size:24px;line-height:1.5;position:relative;z-index:1}
.ky-cta p{color:rgba(255,255,255,.68);font-size:14px;margin-top:8px;position:relative;z-index:1}
.ky-cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}

/* ===== FAQ ===== */
.ky-faq{border-top:1px solid var(--c-line)}
.ky-faq-item{border-bottom:1px solid var(--c-line)}
.ky-faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 4px;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-ink);letter-spacing:.5px;
  transition:color var(--ease);
}
.ky-faq-q:hover{color:var(--c-primary)}
.ky-faq-icon{
  flex:none;width:24px;height:24px;position:relative;
  transition:transform var(--ease-slow);
}
.ky-faq-icon::before,.ky-faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;
  transform:translate(-50%,-50%);
}
.ky-faq-icon::before{width:14px;height:2px}
.ky-faq-icon::after{width:2px;height:14px;transition:transform var(--ease-slow),opacity var(--ease-slow)}
.ky-faq-item.is-open .ky-faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.ky-faq-a{padding:0 40px 0 4px;max-height:0;overflow:hidden;transition:max-height var(--ease-slow),padding var(--ease-slow)}
.ky-faq-item.is-open .ky-faq-a{max-height:260px;padding-bottom:22px}
.ky-faq-a p{font-size:15px;line-height:1.85;color:var(--c-body)}

/* ===== 分栏内容区 ===== */
.ky-split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.ky-split h2{font-size:30px;line-height:1.4;margin-bottom:16px}
.ky-split p{font-size:15px;line-height:1.9;color:var(--c-body);margin-bottom:14px}
.ky-split-media{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);background:var(--c-primary-soft)}
.ky-split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.ky-check{display:grid;gap:12px;margin-top:22px}
.ky-check li{display:flex;gap:10px;font-size:15px;color:var(--c-body)}
.ky-check svg{flex:none;width:20px;height:20px;margin-top:5px;color:var(--c-success)}

/* ===== 分类入口卡 ===== */
.ky-cats{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.ky-cat{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--r-lg);border:1px solid var(--c-line);background:var(--c-surface);
  color:inherit;transition:transform var(--ease-slow),box-shadow var(--ease-slow),border-color var(--ease-slow);
}
.ky-cat:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9D8D4}
.ky-cat img{width:100%;aspect-ratio:16/7;object-fit:cover;background:var(--c-primary-soft)}
.ky-cat-body{padding:22px 24px 26px}
.ky-cat-body h3{font-size:20px;margin-bottom:8px}
.ky-cat:hover .ky-cat-body h3{color:var(--c-primary)}
.ky-cat-body p{font-size:14px;color:var(--c-body)}
.ky-cat-foot{margin-top:16px;font-size:14px;font-weight:600;color:var(--c-primary)}

/* ===== 页脚 ===== */
.ky-footer{position:relative;overflow:hidden;background:var(--c-dark);color:rgba(255,255,255,.72);margin-top:80px}
.ky-footer::before{
  content:"";position:absolute;left:-120px;bottom:-160px;width:420px;height:420px;
  border:1px solid rgba(255,255,255,.1);border-radius:50%;pointer-events:none;
}
.ky-footer-inner{position:relative;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;padding:64px 0 40px}
.ky-footer .ky-logo{color:#fff}
.ky-footer .ky-logo:hover{color:#fff;text-decoration:none}
.ky-footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:32em}
.ky-footer h3{font-size:14px;font-weight:600;color:rgba(255,255,255,.7);margin-bottom:16px;letter-spacing:1px}
.ky-footer ul{display:grid;gap:10px}
.ky-footer ul a{font-size:14px;color:rgba(255,255,255,.6)}
.ky-footer ul a:hover{color:#fff;text-decoration:none}
.ky-footer-bottom{
  position:relative;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 32px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}
.ky-footer-bottom a{color:rgba(255,255,255,.6)}
.ky-footer-bottom a:hover{color:#fff;text-decoration:none}

/* ===== 抽屉与遮罩 ===== */
.ky-mask{
  position:fixed;inset:0;background:rgba(20,32,31,.45);
  opacity:0;visibility:hidden;transition:opacity var(--ease-slow),visibility var(--ease-slow);z-index:90;
}
.ky-mask.is-open{opacity:1;visibility:visible}
.ky-drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:360px;
  background:var(--c-surface);z-index:100;
  transform:translateX(102%);transition:transform var(--ease-slow);
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
}
.ky-drawer.is-open{transform:translateX(0)}
.ky-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.ky-drawer-close{width:44px;height:44px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;color:var(--c-ink)}
.ky-drawer-close:hover{background:var(--c-primary-soft)}
.ky-drawer nav{display:grid;margin:8px 0 20px}
.ky-drawer nav a{display:flex;align-items:center;height:52px;font-size:16px;color:var(--c-ink);border-bottom:1px solid var(--c-line)}
.ky-drawer nav a.is-active{color:var(--c-primary);font-weight:600}
.ky-drawer .ky-search{width:100%;margin-bottom:16px}
.ky-drawer-actions{display:grid;gap:12px}

/* ===== Toast ===== */
.ky-toast{
  position:fixed;right:24px;bottom:24px;z-index:200;
  padding:12px 20px;border-radius:var(--r-pill);
  background:var(--c-dark);color:#fff;font-size:14px;
  box-shadow:var(--sh-3);opacity:0;transform:translateY(12px);
  transition:opacity var(--ease-slow),transform var(--ease-slow);pointer-events:none;
}
.ky-toast.is-show{opacity:1;transform:translateY(0)}

/* ===== 响应式 ===== */
@media (max-width:1023px){
  .container{padding:0 24px}
  .ky-menu,.ky-nav-right{display:none}
  .ky-burger{display:inline-flex;margin-left:auto}
  .ky-hero{padding:48px 0}
  .ky-hero-inner{grid-template-columns:1fr;gap:32px}
  .ky-hero-media{order:-1}
  .ky-hero h1{font-size:32px}
  .ky-section{padding:56px 0}
  .ky-section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
  .ky-section-head h2{font-size:24px}
  .ky-toc{grid-template-columns:1fr}
  .ky-pick-grid{grid-template-columns:1fr}
  .ky-pick-main,.ky-pick-side{grid-column:1/-1}
  .ky-facts{grid-template-columns:repeat(2,1fr)}
  .ky-split{grid-template-columns:1fr;gap:32px}
  .ky-cats{grid-template-columns:1fr}
  .ky-cta{flex-direction:column;align-items:flex-start;padding:32px 28px}
  .ky-cta h2{font-size:21px}
  .ky-rail-nav{display:none}
  .ky-footer-inner{grid-template-columns:repeat(2,1fr);gap:32px;padding:48px 0 32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .ky-hero h1{font-size:28px}
  .ky-hero-sub{font-size:16px}
  .ky-hero-actions .ky-btn{flex:1 1 auto}
  .ky-section{padding:48px 0}
  .ky-section-head h2{font-size:22px}
  .ky-card-main .ky-card-body h3{font-size:19px}
  .ky-card-side{grid-template-columns:112px 1fr}
  .ky-list-item{grid-template-columns:1fr;gap:14px}
  .ky-list-thumb img{width:100%;height:auto;aspect-ratio:16/9}
  .ky-list-body h3{white-space:normal;font-size:17px}
  .ky-facts{grid-template-columns:1fr}
  .ky-rail-card{flex:0 0 78%}
  .ky-footer-inner{grid-template-columns:1fr}
  .ky-footer-bottom{flex-direction:column}
  .ky-toast{left:16px;right:16px;bottom:16px;text-align:center}
  .ky-faq-q{font-size:15px;padding:18px 2px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --c-primary:#0F6F6B;
  --c-primary-deep:#0A4F4C;
  --c-primary-soft:#E3F1EF;
  --c-accent:#E4772F;
  --c-accent-deep:#CF6626;
  --c-accent-soft:#FDEEDF;
  --c-ink:#14201F;
  --c-body:#3D4A48;
  --c-muted:#7C8A88;
  --c-line:#DCE4E1;
  --c-bg:#F7F8F5;
  --c-surface:#FFFFFF;
  --c-dark:#12211F;
  --c-success:#2E8B57;
  --c-danger:#C0392B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,32,31,.06);
  --sh-2:0 8px 24px -12px rgba(20,32,31,.18);
  --sh-3:0 18px 40px -20px rgba(10,79,76,.28);
  --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;
  --dur:200ms;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-body);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--c-primary-deep);text-decoration:underline;text-underline-offset:4px}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:600;letter-spacing:.5px}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:var(--r-sm)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.ky-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- Header ---------- */
.ky-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,248,245,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.ky-header.is-scrolled{box-shadow:var(--sh-1)}
.ky-header-inner{
  display:flex;align-items:center;gap:var(--sp-5);
  min-height:68px;
}
.ky-logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:18px;font-weight:700;color:var(--c-primary);
  letter-spacing:.5px;white-space:nowrap;
}
.ky-logo:hover{text-decoration:none;color:var(--c-primary-deep)}
.ky-logo svg{width:24px;height:24px;flex:none}
.ky-menu{display:flex;align-items:center;gap:4px;margin-right:auto}
.ky-menu a{
  position:relative;display:inline-block;
  padding:10px 14px;font-size:15px;font-weight:600;color:var(--c-body);
  border-radius:var(--r-sm);
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.ky-menu a:hover{color:var(--c-primary);background:var(--c-primary-soft);text-decoration:none}
.ky-menu a.is-active{color:var(--c-primary)}
.ky-menu a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;background:var(--c-primary);
}
.ky-actions{display:flex;align-items:center;gap:var(--sp-3)}
.ky-search{position:relative;display:flex;align-items:center}
.ky-search svg{
  position:absolute;left:14px;width:16px;height:16px;color:var(--c-muted);pointer-events:none;
}
.ky-search input{
  width:220px;height:40px;
  padding:0 16px 0 38px;
  font-size:14px;color:var(--c-ink);
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-pill);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.ky-search input::placeholder{color:var(--c-muted)}
.ky-search input:focus{
  outline:none;border-color:var(--c-primary);box-shadow:var(--sh-1);
}
.ky-login{
  font-size:14px;font-weight:600;color:var(--c-body);padding:8px 6px;white-space:nowrap;
}
.ky-login:hover{color:var(--c-primary);text-decoration:none}
.ky-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  font-size:15px;font-weight:600;letter-spacing:.5px;
  border:1px solid transparent;border-radius:var(--r-pill);
  cursor:pointer;white-space:nowrap;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.ky-btn-sm{height:38px;padding:0 18px;font-size:14px}
.ky-btn-primary{background:var(--c-accent);color:#fff}
.ky-btn-primary:hover{background:var(--c-accent-deep);color:#fff;text-decoration:none;box-shadow:var(--sh-2)}
.ky-btn-primary:active{transform:translateY(1px)}
.ky-btn-outline{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-primary)}
.ky-btn-outline:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);text-decoration:none}
.ky-btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.ky-btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;text-decoration:none}
.ky-burger{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-sm);color:var(--c-ink);cursor:pointer;
}
.ky-burger svg{width:20px;height:20px}
.ky-drawer{
  position:fixed;top:0;right:0;z-index:80;
  width:82%;max-width:360px;height:100%;
  background:var(--c-surface);
  border-left:1px solid var(--c-line);
  padding:var(--sp-5);
  transform:translateX(102%);
  transition:transform 240ms var(--ease);
  overflow-y:auto;
}
.ky-drawer.is-open{transform:translateX(0)}
.ky-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--sp-5)}
.ky-drawer-close{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  background:var(--c-bg);border:1px solid var(--c-line);border-radius:var(--r-sm);
  color:var(--c-ink);cursor:pointer;
}
.ky-drawer nav{display:flex;flex-direction:column;border-top:1px solid var(--c-line)}
.ky-drawer nav a{
  display:flex;align-items:center;min-height:52px;
  font-size:16px;font-weight:600;color:var(--c-ink);
  border-bottom:1px solid var(--c-line);
}
.ky-drawer nav a.is-active{color:var(--c-primary)}
.ky-drawer-cta{display:flex;flex-direction:column;gap:var(--sp-3);margin-top:var(--sp-5)}
.ky-overlay{
  position:fixed;inset:0;z-index:70;background:rgba(20,32,31,.45);
  opacity:0;visibility:hidden;transition:opacity 240ms var(--ease),visibility 240ms var(--ease);
}
.ky-overlay.is-open{opacity:1;visibility:visible}

/* ---------- Breadcrumb ---------- */
.ky-crumb{padding:20px 0 0;font-size:14px;color:var(--c-muted)}
.ky-crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.ky-crumb li{display:flex;align-items:center;gap:8px}
.ky-crumb li+li::before{content:"/";color:var(--c-line)}
.ky-crumb a{color:var(--c-muted)}
.ky-crumb a:hover{color:var(--c-primary);text-decoration:none}
.ky-crumb [aria-current="page"]{
  color:var(--c-ink);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ---------- Article head ---------- */
.ky-article-head{padding:32px 0 0;max-width:820px}
.ky-eyebrow{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:16px}
.ky-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;
  font-size:12px;font-weight:600;letter-spacing:.5px;
  border-radius:var(--r-pill);background:var(--c-primary-soft);color:var(--c-primary);
}
.ky-badge-accent{background:var(--c-accent-soft);color:var(--c-accent)}
.ky-article-head h1{
  font-size:40px;line-height:1.25;font-weight:700;letter-spacing:.5px;margin-bottom:20px;
}
.ky-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  font-size:14px;color:var(--c-muted);font-variant-numeric:tabular-nums;
  padding-bottom:20px;border-bottom:1px solid var(--c-line);
}
.ky-meta span{display:inline-flex;align-items:center;gap:6px}
.ky-meta svg{width:15px;height:15px}

/* ---------- Reader ---------- */
.ky-reader{padding:40px 0 0}
.ky-reader-inner{max-width:760px;margin:0 auto}
.ky-article-body{font-size:17px;line-height:1.85;color:var(--c-body)}
.ky-article-body>*:first-child{margin-top:0}
.ky-article-body p{margin:0 0 1.2em}
.ky-article-body h2{
  font-size:30px;line-height:1.35;font-weight:600;margin:1.7em 0 .7em;
  padding-left:14px;border-left:4px solid var(--c-primary);
}
.ky-article-body h3{font-size:20px;line-height:1.5;font-weight:600;margin:1.6em 0 .6em}
.ky-article-body h4{font-size:17px;font-weight:600;margin:1.4em 0 .5em;color:var(--c-ink)}
.ky-article-body ul,.ky-article-body ol{margin:0 0 1.2em;padding-left:1.3em}
.ky-article-body ul{list-style:disc}
.ky-article-body ol{list-style:decimal}
.ky-article-body li{margin:.4em 0}
.ky-article-body a{border-bottom:1px solid rgba(15,111,107,.35)}
.ky-article-body a:hover{border-bottom-color:var(--c-primary-deep);text-decoration:none}
.ky-article-body blockquote{
  margin:1.5em 0;padding:16px 20px;
  border-left:3px solid var(--c-accent);
  background:var(--c-accent-soft);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--c-ink);
}
.ky-article-body blockquote p:last-child{margin-bottom:0}
.ky-article-body img{border-radius:12px;margin:1.4em auto;height:auto}
.ky-article-body figure{margin:1.6em 0}
.ky-article-body figcaption{
  margin-top:8px;font-size:13px;color:var(--c-muted);text-align:center;
}
.ky-article-body table{
  display:block;width:100%;overflow-x:auto;
  border-collapse:collapse;font-size:15px;margin:1.5em 0;
}
.ky-article-body th,.ky-article-body td{
  padding:10px 14px;border:1px solid var(--c-line);text-align:left;white-space:nowrap;
}
.ky-article-body th{background:var(--c-primary-soft);color:var(--c-ink);font-weight:600}
.ky-article-body pre{
  margin:1.5em 0;padding:18px 20px;overflow-x:auto;
  background:#0E1B1A;color:#DCE4E1;border-radius:var(--r-md);
  font-size:14px;line-height:1.7;
}
.ky-article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;background:var(--c-primary-soft);color:var(--c-primary-deep);
  padding:2px 6px;border-radius:6px;
}
.ky-article-body pre code{background:transparent;color:inherit;padding:0}
.ky-article-body hr{border:0;border-top:1px solid var(--c-line);margin:2em 0}

/* ---------- Empty state ---------- */
.ky-empty{
  text-align:center;padding:56px 24px;
  background:var(--c-primary-soft);border-radius:var(--r-lg);
}
.ky-empty svg{width:44px;height:44px;color:var(--c-primary);margin:0 auto 14px}
.ky-empty h2{font-size:22px;margin-bottom:8px}
.ky-empty p{color:var(--c-body);margin-bottom:20px}

/* ---------- Article footer actions ---------- */
.ky-tags{
  display:flex;flex-wrap:wrap;gap:10px;margin:40px 0 0;
  padding-top:24px;border-top:1px solid var(--c-line);
}
.ky-actions-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:24px;
}
.ky-icon-btn{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 18px;font-size:14px;font-weight:600;
  background:var(--c-surface);color:var(--c-ink);
  border:1px solid var(--c-line);border-radius:var(--r-pill);cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.ky-icon-btn:hover{background:var(--c-primary-soft);color:var(--c-primary);border-color:var(--c-primary)}
.ky-icon-btn svg{width:16px;height:16px}

/* ---------- Related ---------- */
.ky-section{padding:64px 0 0}
.ky-section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
  margin-bottom:28px;
}
.ky-section-head h2{font-size:26px}
.ky-section-head h2::before{
  content:"";display:inline-block;width:4px;height:20px;border-radius:2px;
  background:var(--c-primary);margin-right:12px;vertical-align:-2px;
}
.ky-section-head a{font-size:14px;font-weight:600}
.ky-rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ky-card{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);overflow:hidden;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.ky-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9D8D5;text-decoration:none}
.ky-card-thumb{position:relative;aspect-ratio:16/10;background:var(--c-primary-soft);overflow:hidden}
.ky-card-thumb img{width:100%;height:100%;object-fit:cover}
.ky-card-body{padding:18px 18px 20px}
.ky-card-body h3{
  font-size:17px;font-weight:600;line-height:1.5;margin-bottom:8px;color:var(--c-ink);
  transition:color var(--dur) var(--ease);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.ky-card:hover .ky-card-body h3{color:var(--c-primary)}
.ky-card-body p{
  font-size:14px;color:var(--c-muted);margin:0 0 12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.ky-card-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--c-muted);font-variant-numeric:tabular-nums}
.ky-tag{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;
  font-size:12px;font-weight:600;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary);
}

/* ---------- FAQ ---------- */
.ky-faq{max-width:820px;border-top:1px solid var(--c-line)}
.ky-faq-item{border-bottom:1px solid var(--c-line)}
.ky-faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-ink);letter-spacing:.5px;
}
.ky-faq-q:hover{color:var(--c-primary)}
.ky-faq-q span.sign{
  flex:none;width:24px;height:24px;display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:400;color:var(--c-primary);
  transition:transform 180ms var(--ease);
}
.ky-faq-q[aria-expanded="true"] span.sign{transform:rotate(45deg)}
.ky-faq-a{max-height:0;overflow:hidden;transition:max-height 220ms var(--ease)}
.ky-faq-a p{margin:0;padding:0 0 20px;font-size:15px;line-height:1.8;color:var(--c-body)}

/* ---------- CTA band ---------- */
.ky-cta{
  margin-top:80px;
  background:var(--c-dark);color:rgba(255,255,255,.72);
  border-radius:var(--r-lg);
  padding:36px 40px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  position:relative;overflow:hidden;
}
.ky-cta::after{
  content:"";position:absolute;right:-60px;top:-40px;width:280px;height:280px;
  border:1px solid rgba(255,255,255,.1);border-radius:50%;
}
.ky-cta strong{display:block;color:#fff;font-size:20px;font-weight:600;letter-spacing:.5px;margin-bottom:6px}
.ky-cta p{margin:0;font-size:14px}
.ky-cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1}

/* ---------- Toast ---------- */
.ky-toast{
  position:fixed;right:24px;bottom:24px;z-index:120;
  padding:12px 20px;border-radius:var(--r-pill);
  background:var(--c-dark);color:#fff;font-size:14px;box-shadow:var(--sh-3);
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity 200ms var(--ease),transform 200ms var(--ease);
}
.ky-toast.is-show{opacity:1;transform:translateY(0)}

/* ---------- Footer ---------- */
.ky-footer{
  margin-top:96px;background:var(--c-dark);color:rgba(255,255,255,.6);
  padding:64px 0 28px;position:relative;overflow:hidden;
}
.ky-footer::before{
  content:"";position:absolute;left:-80px;bottom:-120px;width:360px;height:360px;
  border:1px solid rgba(255,255,255,.1);border-radius:50%;
}
.ky-footer-inner{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  position:relative;z-index:1;
}
.ky-footer-brand .ky-logo{color:#fff}
.ky-footer-brand .ky-logo:hover{color:#fff;text-decoration:none}
.ky-footer-brand p{font-size:14px;line-height:1.8;margin:16px 0 0;max-width:360px}
.ky-footer h3{
  font-size:14px;font-weight:600;color:rgba(255,255,255,.72);
  margin-bottom:16px;letter-spacing:.5px;
}
.ky-footer ul li{margin-bottom:10px}
.ky-footer ul a{font-size:14px;color:rgba(255,255,255,.6)}
.ky-footer ul a:hover{color:#fff;text-decoration:none}
.ky-footer-bottom{
  margin-top:48px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.5);position:relative;z-index:1;
}
.ky-footer-bottom a{color:rgba(255,255,255,.7)}
.ky-footer-bottom a:hover{color:#fff;text-decoration:none}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  .container{padding:0 24px}
  .ky-menu,.ky-search,.ky-login{display:none}
  .ky-burger{display:inline-flex}
  .ky-actions .ky-btn-sm{display:none}
  .ky-article-head h1{font-size:32px}
  .ky-article-body h2{font-size:24px}
  .ky-rel-grid{grid-template-columns:repeat(2,1fr)}
  .ky-footer-inner{grid-template-columns:1fr 1fr;gap:32px}
  .ky-section{padding-top:48px}
  .ky-cta{margin-top:56px;padding:28px 24px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .ky-header-inner{min-height:60px;gap:12px}
  .ky-logo{font-size:16px}
  .ky-logo svg{width:22px;height:22px}
  .ky-crumb{padding-top:16px}
  .ky-article-head{padding-top:24px}
  .ky-article-head h1{font-size:28px;line-height:1.3}
  .ky-article-body{font-size:16px;line-height:1.85}
  .ky-article-body h2{font-size:22px;padding-left:12px;border-left-width:4px}
  .ky-article-body h3{font-size:18px}
  .ky-meta{gap:10px;font-size:13px}
  .ky-rel-grid{grid-template-columns:1fr}
  .ky-section-head h2{font-size:22px}
  .ky-cta{flex-direction:column;align-items:flex-start}
  .ky-cta-actions{width:100%}
  .ky-cta-actions .ky-btn{flex:1 1 auto}
  .ky-footer{padding:48px 0 24px;margin-top:64px}
  .ky-footer-inner{grid-template-columns:1fr;gap:28px}
  .ky-faq-q{font-size:15px}
}
@media (max-width:520px){
  .ky-article-head h1{font-size:24px}
  .ky-crumb [aria-current="page"]{max-width:200px}
  .ky-btn{width:100%}
  .ky-cta-actions .ky-btn{width:100%}
  .ky-icon-btn{width:100%;justify-content:center}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --c-primary:#0F6F6B;
  --c-primary-deep:#0A4F4C;
  --c-primary-soft:#E3F1EF;
  --c-accent:#E4772F;
  --c-accent-deep:#CF6626;
  --c-accent-soft:#FDEEDF;
  --c-ink:#14201F;
  --c-body:#3D4A48;
  --c-muted:#7C8A88;
  --c-line:#DCE4E1;
  --c-bg:#F7F8F5;
  --c-surface:#FFFFFF;
  --c-dark:#12211F;
  --c-success:#2E8B57;
  --c-danger:#C0392B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,32,31,.06);
  --sh-2:0 8px 24px -12px rgba(20,32,31,.18);
  --sh-3:0 18px 40px -20px rgba(10,79,76,.28);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --ease:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease);}
a:hover{text-decoration:underline;text-underline-offset:4px;}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:600;letter-spacing:.5px;}
h1{font-size:40px;line-height:1.25;font-weight:700;}
h2{font-size:30px;line-height:1.35;}
h3{font-size:20px;line-height:1.5;}
p{margin:0 0 16px;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.ky-skip{position:absolute;left:-9999px;top:0;background:var(--c-surface);padding:10px 16px;border-radius:var(--r-sm);z-index:999;}
.ky-skip:focus{left:16px;top:16px;}

/* ============ 导航 ============ */
.ky-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(247,248,245,.92);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--ease);
}
.ky-header.is-scrolled{box-shadow:var(--sh-1);}
.ky-header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:68px;
}
.ky-logo{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:18px;
  font-weight:700;
  color:var(--c-primary);
  letter-spacing:.5px;
  white-space:nowrap;
  flex:0 0 auto;
}
.ky-logo:hover{text-decoration:none;color:var(--c-primary-deep);}
.ky-logo svg{width:24px;height:24px;flex:0 0 auto;}
.ky-menu{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:8px;
}
.ky-menu a{
  position:relative;
  font-size:15px;
  color:var(--c-body);
  padding:22px 0;
  white-space:nowrap;
}
.ky-menu a:hover{color:var(--c-primary);text-decoration:none;}
.ky-menu a.is-active{color:var(--c-primary);font-weight:600;}
.ky-menu a.is-active::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:14px;
  height:2px;
  border-radius:2px;
  background:var(--c-primary);
}
.ky-header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:12px;
}
.ky-search{
  position:relative;
  width:240px;
}
.ky-search svg{
  position:absolute;
  left:14px;top:50%;
  transform:translateY(-50%);
  width:16px;height:16px;
  color:var(--c-muted);
  pointer-events:none;
}
.ky-search input{
  width:100%;
  height:40px;
  padding:0 16px 0 38px;
  border:1px solid var(--c-line);
  border-radius:var(--r-pill);
  background:var(--c-surface);
  font-size:14px;
  color:var(--c-ink);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.ky-search input::placeholder{color:var(--c-muted);}
.ky-search input:focus{
  outline:none;
  border-color:var(--c-primary);
  box-shadow:var(--sh-1);
}
.ky-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  line-height:1;
  padding:12px 22px;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.ky-btn:hover{text-decoration:none;}
.ky-btn--primary{background:var(--c-accent);color:#fff;box-shadow:var(--sh-1);}
.ky-btn--primary:hover{background:var(--c-accent-deep);color:#fff;box-shadow:var(--sh-2);}
.ky-btn--ghost{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-primary);}
.ky-btn--ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.ky-btn--text{background:transparent;color:var(--c-primary);padding:12px 8px;}
.ky-btn--text:hover{text-decoration:underline;text-underline-offset:4px;}
.ky-btn--light{background:#fff;color:var(--c-primary-deep);}
.ky-btn--light:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.ky-btn--outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.ky-btn--outline-light:hover{background:rgba(255,255,255,.12);color:#fff;}
.ky-btn:disabled,.ky-btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;}
.ky-burger{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--c-line);
  border-radius:var(--r-sm);
  background:var(--c-surface);
  color:var(--c-ink);
  align-items:center;
  justify-content:center;
}
.ky-burger svg{width:20px;height:20px;}
.ky-drawer{
  position:fixed;
  top:0;right:0;
  width:82%;
  max-width:380px;
  height:100%;
  background:var(--c-surface);
  box-shadow:var(--sh-3);
  transform:translateX(105%);
  transition:transform 240ms ease-out;
  z-index:120;
  padding:20px 20px 32px;
  overflow-y:auto;
}
.ky-drawer.is-open{transform:translateX(0);}
.ky-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.ky-drawer-close{
  width:44px;height:44px;
  border:1px solid var(--c-line);
  border-radius:var(--r-sm);
  background:var(--c-surface);
  color:var(--c-ink);
  display:flex;align-items:center;justify-content:center;
}
.ky-drawer-close svg{width:18px;height:18px;}
.ky-drawer .ky-search{width:100%;margin-bottom:16px;}
.ky-drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--c-line);}
.ky-drawer-nav a{
  display:flex;
  align-items:center;
  min-height:52px;
  padding:0 4px;
  font-size:16px;
  color:var(--c-ink);
  border-bottom:1px solid var(--c-line);
}
.ky-drawer-nav a.is-active{color:var(--c-primary);font-weight:600;}
.ky-drawer-actions{display:flex;flex-direction:column;gap:12px;margin-top:24px;}
.ky-drawer-actions .ky-btn{width:100%;}
.ky-mask{
  position:fixed;
  inset:0;
  background:rgba(20,32,31,.45);
  opacity:0;
  visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);
  z-index:110;
}
.ky-mask.is-open{opacity:1;visibility:visible;}

/* ============ 分类页头 ============ */
.ky-breadcrumb{
  padding:20px 0 0;
  font-size:14px;
  color:var(--c-muted);
}
.ky-breadcrumb a{color:var(--c-muted);}
.ky-breadcrumb a:hover{color:var(--c-primary);text-decoration:none;}
.ky-breadcrumb span.sep{margin:0 8px;color:var(--c-line);}
.ky-breadcrumb .current{color:var(--c-ink);}
.ky-cat-hero{
  position:relative;
  margin-top:20px;
  border-radius:var(--r-lg);
  overflow:hidden;
  background:linear-gradient(120deg,#0F6F6B 0%,#147F79 55%,#0A4F4C 100%);
  color:#fff;
  padding:48px 48px 44px;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:40px;
  align-items:center;
}
.ky-cat-hero::before{
  content:"";
  position:absolute;
  right:-60px;top:-80px;
  width:340px;height:340px;
  border:1px solid rgba(255,255,255,.18);
  border-radius:50%;
  pointer-events:none;
}
.ky-cat-hero::after{
  content:"";
  position:absolute;
  right:40px;bottom:-120px;
  width:260px;height:260px;
  border:1px solid rgba(255,255,255,.12);
  border-radius:50%;
  pointer-events:none;
}
.ky-cat-hero-text{position:relative;z-index:2;}
.ky-cat-hero h1{color:#fff;font-size:40px;margin-bottom:14px;}
.ky-cat-hero p.sub{
  font-size:16px;
  color:rgba(255,255,255,.86);
  margin-bottom:24px;
  max-width:520px;
}
.ky-cat-hero-media{
  position:relative;
  z-index:2;
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--c-primary-soft);
  aspect-ratio:4/3;
  box-shadow:var(--sh-3);
}
.ky-cat-hero-media img{width:100%;height:100%;object-fit:cover;}
.ky-cat-hero-media.is-fallback{
  background:var(--c-primary-soft);
  background-image:radial-gradient(circle at 30% 30%,rgba(15,111,107,.12) 0,transparent 60%);
}
.is-fallback::after{
  content:"";
  position:absolute;
  inset:24px;
  border:1px solid rgba(15,111,107,.25);
  border-radius:var(--r-md);
}
.ky-tags{display:flex;flex-wrap:wrap;gap:10px;}
.ky-tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:var(--r-pill);
  font-size:12px;
  line-height:1;
  background:var(--c-primary-soft);
  color:var(--c-primary);
}
.ky-tag--accent{background:var(--c-accent-soft);color:var(--c-accent);}
.ky-cat-hero .ky-tag{background:rgba(255,255,255,.16);color:#fff;}

/* ============ 板块 ============ */
.ky-section{padding:80px 0;}
.ky-section--tight{padding:64px 0;}
.ky-section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
  padding-bottom:16px;
  border-bottom:1px solid var(--c-line);
}
.ky-section-head h2{position:relative;padding-left:16px;}
.ky-section-head h2::before{
  content:"";
  position:absolute;
  left:0;top:6px;bottom:6px;
  width:4px;
  border-radius:2px;
  background:var(--c-primary);
}
.ky-section-head p{
  margin:8px 0 0 16px;
  font-size:14px;
  color:var(--c-muted);
}
.ky-more{
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
}
.ky-more:hover{text-decoration:underline;text-underline-offset:4px;}

/* 分类概述 */
.ky-overview{
  display:grid;
  grid-template-columns:1.4fr .9fr;
  gap:48px;
  align-items:start;
}
.ky-overview p{font-size:16px;color:var(--c-body);}
.ky-stats{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
}
.ky-stat{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  padding:20px;
  box-shadow:var(--sh-1);
}
.ky-stat strong{
  display:block;
  font-size:28px;
  line-height:1.2;
  color:var(--c-primary);
  font-variant-numeric:tabular-nums;
  font-weight:700;
}
.ky-stat span{display:block;font-size:13px;color:var(--c-muted);margin-top:6px;}

/* 专题目录 */
.ky-toc{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:0 40px;
  border-top:1px solid var(--c-line);
}
.ky-toc a{
  display:flex;
  align-items:center;
  gap:16px;
  padding:20px 8px;
  border-bottom:1px solid var(--c-line);
  color:var(--c-ink);
}
.ky-toc a:hover{
  background:var(--c-primary-soft);
  text-decoration:none;
}
.ky-toc .num{
  font-size:14px;
  font-weight:700;
  color:var(--c-accent);
  font-variant-numeric:tabular-nums;
  flex:0 0 auto;
}
.ky-toc .txt{flex:1 1 auto;min-width:0;}
.ky-toc .txt b{display:block;font-size:16px;font-weight:600;color:var(--c-ink);}
.ky-toc .txt em{
  display:block;
  font-style:normal;
  font-size:13px;
  color:var(--c-muted);
  margin-top:2px;
}
.ky-toc .arrow{
  flex:0 0 auto;
  color:var(--c-muted);
  transition:transform var(--ease),color var(--ease);
}
.ky-toc a:hover .arrow{transform:translateX(4px);color:var(--c-primary);}

/* 条目卡 */
.ky-entries{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:32px 24px;
}
.ky-entry{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.ky-entry:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
  border-color:#c9dad6;
}
.ky-entry-media{
  position:relative;
  aspect-ratio:4/3;
  background:var(--c-primary-soft);
  overflow:hidden;
}
.ky-entry-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out;}
.ky-entry:hover .ky-entry-media img{transform:scale(1.03);}
.ky-entry-body{padding:20px 22px 24px;}
.ky-entry-body h3{font-size:17px;margin-bottom:8px;transition:color var(--ease);}
.ky-entry:hover .ky-entry-body h3{color:var(--c-primary);}
.ky-entry-body p{
  font-size:14px;
  color:var(--c-body);
  margin:0 0 14px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.ky-meta{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:12px;
  color:var(--c-muted);
  font-variant-numeric:tabular-nums;
}
.ky-meta .badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:var(--r-pill);
  background:var(--c-primary-soft);
  color:var(--c-primary);
  font-size:12px;
}
.ky-entry--lead{
  grid-column:1 / -1;
  display:grid;
  grid-template-columns:1.1fr 1fr;
  align-items:stretch;
}
.ky-entry--lead .ky-entry-media{aspect-ratio:16/9;height:100%;}
.ky-entry--lead .ky-entry-body{
  padding:32px 34px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.ky-entry--lead .ky-entry-body h3{font-size:22px;margin-bottom:12px;}
.ky-entry--lead .ky-entry-body p{
  font-size:15px;
  -webkit-line-clamp:3;
  margin-bottom:20px;
}
.ky-read{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--c-primary);
}

/* 交叉链接 */
.ky-cross{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.ky-cross a{
  display:block;
  padding:26px 24px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  color:var(--c-ink);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.ky-cross a:hover{
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
  border-color:var(--c-primary);
}
.ky-cross h3{font-size:17px;margin-bottom:8px;transition:color var(--ease);}
.ky-cross a:hover h3{color:var(--c-primary);}
.ky-cross p{font-size:14px;color:var(--c-muted);margin:0;}
.ky-cross .ky-tag{margin-top:14px;}

/* CTA 条 */
.ky-cta{
  background:var(--c-dark);
  color:#fff;
  border-radius:var(--r-lg);
  padding:40px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  position:relative;
  overflow:hidden;
}
.ky-cta::after{
  content:"";
  position:absolute;
  right:-40px;bottom:-90px;
  width:240px;height:240px;
  border:1px solid rgba(255,255,255,.1);
  border-radius:50%;
}
.ky-cta p{
  position:relative;
  z-index:2;
  margin:0;
  font-size:20px;
  font-weight:600;
  color:#fff;
  letter-spacing:.5px;
}
.ky-cta-actions{position:relative;z-index:2;display:flex;gap:12px;flex-wrap:wrap;}

/* FAQ */
.ky-faq{max-width:820px;}
.ky-faq-item{border-bottom:1px solid var(--c-line);}
.ky-faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 4px;
  background:transparent;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--c-ink);
}
.ky-faq-q:hover{color:var(--c-primary);}
.ky-faq-icon{
  flex:0 0 auto;
  width:22px;height:22px;
  position:relative;
  transition:transform 180ms ease-out;
  color:var(--c-primary);
}
.ky-faq-icon::before,.ky-faq-icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:currentColor;
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.ky-faq-icon::before{width:14px;height:2px;}
.ky-faq-icon::after{width:2px;height:14px;transition:opacity 180ms ease-out;}
.ky-faq-item.is-open .ky-faq-icon::after{opacity:0;}
.ky-faq-item.is-open .ky-faq-icon{transform:rotate(180deg);}
.ky-faq-a{
  display:none;
  padding:0 4px 22px;
  font-size:15px;
  line-height:1.8;
  color:var(--c-body);
  max-width:680px;
}
.ky-faq-item.is-open .ky-faq-a{display:block;}

/* 页脚 */
.ky-footer{
  background:var(--c-dark);
  color:rgba(255,255,255,.6);
  margin-top:80px;
  padding:64px 0 28px;
  position:relative;
  overflow:hidden;
}
.ky-footer::before{
  content:"";
  position:absolute;
  left:-80px;top:-120px;
  width:320px;height:320px;
  border:1px solid rgba(255,255,255,.1);
  border-radius:50%;
  pointer-events:none;
}
.ky-footer-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.ky-footer-brand .ky-logo{color:#fff;margin-bottom:14px;}
.ky-footer-brand .ky-logo:hover{color:#fff;}
.ky-footer-brand p{font-size:14px;color:rgba(255,255,255,.6);max-width:360px;margin:0;}
.ky-footer h3{
  font-size:14px;
  font-weight:600;
  color:rgba(255,255,255,.7);
  margin-bottom:16px;
  letter-spacing:.5px;
}
.ky-footer ul li{margin-bottom:10px;}
.ky-footer ul a{font-size:14px;color:rgba(255,255,255,.6);}
.ky-footer ul a:hover{color:#fff;text-decoration:none;}
.ky-footer-bottom{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:24px;
  font-size:13px;
  color:rgba(255,255,255,.5);
}
.ky-footer-bottom a{color:rgba(255,255,255,.7);}
.ky-footer-bottom a:hover{color:#fff;}

/* Toast */
.ky-toast{
  position:fixed;
  right:24px;bottom:24px;
  background:var(--c-dark);
  color:#fff;
  font-size:14px;
  padding:12px 20px;
  border-radius:var(--r-pill);
  box-shadow:var(--sh-3);
  opacity:0;
  transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease);
  pointer-events:none;
  z-index:200;
}
.ky-toast.is-show{opacity:1;transform:translateY(0);}

/* 响应式 */
@media (max-width:1023px){
  .container{padding:0 24px;}
  .ky-menu{display:none;}
  .ky-search--desk{display:none;}
  .ky-header-actions .ky-btn--ghost{display:none;}
  .ky-burger{display:flex;}
  h1{font-size:32px;}
  .ky-cat-hero{grid-template-columns:1fr;padding:36px 28px;gap:28px;}
  .ky-cat-hero h1{font-size:32px;}
  .ky-cat-hero-media{aspect-ratio:16/9;}
  .ky-overview{grid-template-columns:1fr;gap:32px;}
  .ky-toc{grid-template-columns:1fr;}
  .ky-entries{grid-template-columns:1fr;}
  .ky-entry--lead{grid-template-columns:1fr;}
  .ky-entry--lead .ky-entry-media{aspect-ratio:16/9;height:auto;}
  .ky-cross{grid-template-columns:1fr;}
  .ky-section{padding:48px 0;}
  .ky-cta{flex-direction:column;align-items:flex-start;padding:32px 28px;}
  .ky-footer-inner{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  .ky-cat-hero h1{font-size:28px;}
  .ky-cat-hero{padding:28px 20px;border-radius:var(--r-md);}
  .ky-section{padding:48px 0;}
  .ky-section-head{flex-direction:column;align-items:flex-start;margin-bottom:24px;}
  .ky-stats{grid-template-columns:1fr 1fr;}
  .ky-cta p{font-size:17px;}
  .ky-cta-actions{width:100%;}
  .ky-cta-actions .ky-btn{flex:1 1 auto;}
  .ky-footer-inner{grid-template-columns:1fr;}
  .ky-toast{left:16px;right:16px;text-align:center;}
}
@media (max-width:520px){
  .ky-stats{grid-template-columns:1fr;}
  .ky-cat-hero .ky-tags{gap:8px;}
  .ky-btn{padding:12px 18px;font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category2 */
:root{
  --c-primary:#0F6F6B;
  --c-primary-deep:#0A4F4C;
  --c-primary-soft:#E3F1EF;
  --c-accent:#E4772F;
  --c-accent-deep:#CF6626;
  --c-accent-soft:#FDEEDF;
  --c-ink:#14201F;
  --c-body:#3D4A48;
  --c-muted:#7C8A88;
  --c-line:#DCE4E1;
  --c-bg:#F7F8F5;
  --c-surface:#FFFFFF;
  --c-dark:#12211F;
  --c-success:#2E8B57;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,32,31,.06);
  --sh-2:0 8px 24px -12px rgba(20,32,31,.18);
  --sh-3:0 18px 40px -20px rgba(10,79,76,.28);
  --sec:80px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.8;color:var(--c-body);background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease}
a:hover{text-decoration:underline;text-underline-offset:4px}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:600;letter-spacing:.5px;line-height:1.35}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* ---------- 导航 ---------- */
.ky-header{
  position:sticky;top:0;z-index:80;background:rgba(247,248,245,.94);
  border-bottom:1px solid var(--c-line);transition:box-shadow .2s ease;
}
.ky-header.is-scrolled{box-shadow:var(--sh-1)}
.ky-header-inner{display:flex;align-items:center;gap:24px;height:68px}
.ky-logo{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--c-primary);letter-spacing:.5px;flex-shrink:0}
.ky-logo:hover{text-decoration:none;color:var(--c-primary-deep)}
.ky-logo svg{width:24px;height:24px;flex-shrink:0}
.ky-menu{display:flex;align-items:center;gap:26px;margin-left:6px}
.ky-menu a{position:relative;font-size:15px;color:var(--c-body);padding:6px 0;white-space:nowrap}
.ky-menu a:hover{color:var(--c-primary);text-decoration:none}
.ky-menu a.is-active{color:var(--c-primary);font-weight:600}
.ky-menu a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--c-primary);border-radius:2px}
.ky-header-tools{display:flex;align-items:center;gap:14px;margin-left:auto}
.ky-search{position:relative;width:240px}
.ky-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--c-muted)}
.ky-search input{
  width:100%;height:40px;border-radius:var(--r-pill);border:1px solid var(--c-line);
  background:var(--c-surface);padding:0 16px 0 36px;font-size:14px;color:var(--c-ink);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.ky-search input::placeholder{color:var(--c-muted)}
.ky-search input:focus{outline:none;border-color:var(--c-primary);box-shadow:var(--sh-1)}
.ky-text-btn{font-size:15px;color:var(--c-body);white-space:nowrap}
.ky-text-btn:hover{color:var(--c-primary);text-decoration:none}
.ky-menu-toggle{display:none;width:44px;height:44px;border-radius:var(--r-sm);align-items:center;justify-content:center;color:var(--c-ink)}
.ky-menu-toggle:hover{background:var(--c-primary-soft)}
.ky-menu-toggle svg{width:22px;height:22px}

/* 抽屉 */
.ky-drawer{position:fixed;inset:0;z-index:120;pointer-events:none}
.ky-drawer-mask{position:absolute;inset:0;background:rgba(20,32,31,.45);opacity:0;transition:opacity .22s ease}
.ky-drawer-panel{
  position:absolute;top:0;right:0;width:82%;max-width:360px;height:100%;background:var(--c-surface);
  transform:translateX(100%);transition:transform .24s ease;padding:20px 20px 32px;overflow-y:auto;
  display:flex;flex-direction:column;gap:8px;
}
.ky-drawer.is-open{pointer-events:auto}
.ky-drawer.is-open .ky-drawer-mask{opacity:1}
.ky-drawer.is-open .ky-drawer-panel{transform:translateX(0)}
.ky-drawer-close{width:44px;height:44px;align-self:flex-end;display:flex;align-items:center;justify-content:center;border-radius:var(--r-sm);color:var(--c-ink)}
.ky-drawer-close:hover{background:var(--c-primary-soft)}
.ky-drawer-close svg{width:22px;height:22px}
.ky-drawer a.ky-drawer-link{display:flex;align-items:center;height:52px;font-size:16px;color:var(--c-body);border-bottom:1px solid var(--c-line);padding:0 4px}
.ky-drawer a.ky-drawer-link:hover{color:var(--c-primary);text-decoration:none}
.ky-drawer a.ky-drawer-link.is-active{color:var(--c-primary);font-weight:600}
.ky-drawer .ky-search{width:100%;margin:16px 0 8px}

/* ---------- 按钮 ---------- */
.ky-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-pill);font-size:15px;font-weight:600;
  border:1px solid transparent;transition:background-color .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease;
  cursor:pointer;white-space:nowrap;
}
.ky-btn:hover{text-decoration:none}
.ky-btn-solid{background:var(--c-accent);color:#fff;box-shadow:var(--sh-1)}
.ky-btn-solid:hover{background:var(--c-accent-deep);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px)}
.ky-btn-outline{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-primary)}
.ky-btn-outline:hover{background:var(--c-primary-soft);color:var(--c-primary-deep)}
.ky-btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.ky-btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.ky-btn-sm{height:38px;padding:0 18px;font-size:14px}
.ky-btn-block{width:100%}
.ky-text-link{font-size:15px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px}
.ky-text-link:hover{text-decoration:underline;text-underline-offset:4px}

/* ---------- 徽章 ---------- */
.ky-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;line-height:1;background:var(--c-primary-soft);color:var(--c-primary);white-space:nowrap;
}
.ky-badge-accent{background:var(--c-accent-soft);color:var(--c-accent-deep)}

/* ---------- 深色窄幅页头 ---------- */
.ky-hero{position:relative;background:var(--c-dark);color:#fff;overflow:hidden}
.ky-hero::before{
  content:"";position:absolute;right:-90px;top:-120px;width:420px;height:420px;border-radius:50%;
  border:1px solid rgba(255,255,255,.14);pointer-events:none;
}
.ky-hero::after{
  content:"";position:absolute;left:-40px;bottom:-70px;width:220px;height:220px;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:16px 16px;opacity:.7;pointer-events:none;
}
.ky-hero-inner{position:relative;z-index:2;padding:30px 0 42px;min-height:196px;display:flex;flex-direction:column;justify-content:center}
.ky-crumb{font-size:14px;color:rgba(255,255,255,.62);margin-bottom:16px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.ky-crumb a{color:rgba(255,255,255,.62)}
.ky-crumb a:hover{color:#fff;text-decoration:none}
.ky-crumb span.sep{color:rgba(255,255,255,.35)}
.ky-crumb strong{color:#fff;font-weight:600}
.ky-hero h1{color:#fff;font-size:40px;line-height:1.25;max-width:860px;letter-spacing:.5px}
.ky-hero-sub{margin:14px 0 0;font-size:17px;color:rgba(255,255,255,.78);max-width:700px}
.ky-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}

/* ---------- 通用板块 ---------- */
.ky-section{padding:var(--sec) 0}
.ky-section-tight{padding:56px 0}
.ky-section-alt{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.ky-section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.ky-section-head h2{font-size:30px;position:relative;padding-left:16px}
.ky-section-head h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--c-primary)}
.ky-section-head p{margin:8px 0 0;color:var(--c-muted);font-size:15px;max-width:620px}

/* ---------- 概述 + 数据 ---------- */
.ky-overview{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:start}
.ky-overview p{font-size:16px;color:var(--c-body)}
.ky-overview figure{margin:0}
.ky-overview figure img{border-radius:var(--r-lg);box-shadow:var(--sh-2);aspect-ratio:4/3;object-fit:cover;background:var(--c-primary-soft)}
.ky-overview figcaption{font-size:13px;color:var(--c-muted);margin-top:10px;text-align:center}
.ky-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:32px}
.ky-stat{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);padding:20px;box-shadow:var(--sh-1);transition:box-shadow .2s ease,transform .2s ease}
.ky-stat:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.ky-stat b{display:block;font-size:30px;line-height:1.2;color:var(--c-primary);font-variant-numeric:tabular-nums;font-weight:700}
.ky-stat span{display:block;font-size:14px;color:var(--c-muted);margin-top:6px}

/* ---------- 双栏：粘性目录 + 内容流 ---------- */
.ky-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.ky-side{position:sticky;top:92px;display:flex;flex-direction:column;gap:20px}
.ky-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1)}
.ky-toc{padding:22px}
.ky-toc h3{font-size:16px;margin-bottom:14px}
.ky-toc ul li + li{margin-top:2px}
.ky-toc a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 12px;border-radius:var(--r-sm);font-size:15px;color:var(--c-body);
  transition:background-color .18s ease,color .18s ease;
}
.ky-toc a:hover{background:var(--c-primary-soft);color:var(--c-primary);text-decoration:none}
.ky-toc a span.arrow{color:var(--c-muted);font-size:14px}
.ky-aside{padding:20px}
.ky-aside h3{font-size:15px;margin-bottom:12px}
.ky-aside li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--c-body);padding:9px 0;border-bottom:1px dashed var(--c-line)}
.ky-aside li:last-child{border-bottom:0}
.ky-aside li time{color:var(--c-muted);font-variant-numeric:tabular-nums;flex-shrink:0}
.ky-aside .ky-aside-note{font-size:13px;color:var(--c-muted);margin:12px 0 0}

.ky-flow > section + section{margin-top:64px}
.ky-flow h2{font-size:26px;margin-bottom:8px}
.ky-flow .ky-flow-lead{color:var(--c-muted);font-size:15px;margin-bottom:24px;max-width:680px}

/* ---------- 编号清单 ---------- */
.ky-numlist{border-top:1px solid var(--c-line)}
.ky-numitem{
  display:grid;grid-template-columns:56px minmax(0,1fr) auto 22px;gap:16px;align-items:center;
  min-height:72px;padding:14px 12px;border-bottom:1px solid var(--c-line);color:var(--c-body);
  transition:background-color .18s ease;
}
.ky-numitem:hover{background:rgba(227,241,239,.55);text-decoration:none;color:var(--c-body)}
.ky-num{font-size:18px;font-weight:700;color:var(--c-accent);font-variant-numeric:tabular-nums}
.ky-num-main{display:block;min-width:0}
.ky-num-title{display:block;font-size:17px;font-weight:600;color:var(--c-ink);line-height:1.5}
.ky-numitem:hover .ky-num-title{color:var(--c-primary)}
.ky-num-desc{display:block;font-size:14px;color:var(--c-muted);line-height:1.7;margin-top:2px}
.ky-num-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.ky-num-arrow{color:var(--c-muted);font-size:16px}
.ky-numitem:hover .ky-num-arrow{color:var(--c-primary)}

/* ---------- 场景卡 ---------- */
.ky-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.ky-usecase{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease}
.ky-usecase:hover{transform:translateY(-2px);box-shadow:var(--sh-3)}
.ky-usecase img{aspect-ratio:16/9;object-fit:cover;width:100%;background:var(--c-primary-soft)}
.ky-usecase-body{padding:22px}
.ky-usecase-body h3{font-size:18px;margin-bottom:10px}
.ky-usecase-body p{font-size:15px;color:var(--c-body);margin-bottom:14px}
.ky-usecase-body ul{display:flex;flex-direction:column;gap:6px}
.ky-usecase-body ul li{position:relative;padding-left:16px;font-size:14px;color:var(--c-muted)}
.ky-usecase-body ul li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--c-primary)}

/* ---------- 流程 ---------- */
.ky-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;counter-reset:step}
.ky-step{position:relative;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);padding:24px 22px;box-shadow:var(--sh-1)}
.ky-step b{
  display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;
  background:var(--c-accent-soft);color:var(--c-accent-deep);font-size:14px;font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.ky-step h3{font-size:17px;margin-bottom:8px}
.ky-step p{font-size:14px;color:var(--c-muted);margin:0}

/* ---------- FAQ ---------- */
.ky-faq{border-top:1px solid var(--c-line)}
.ky-faq-item{border-bottom:1px solid var(--c-line)}
.ky-faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;
  padding:20px 4px;font-size:16px;font-weight:600;color:var(--c-ink);
}
.ky-faq-q:hover{color:var(--c-primary)}
.ky-faq-icon{position:relative;width:20px;height:20px;flex-shrink:0;color:var(--c-primary)}
.ky-faq-icon::before,.ky-faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px;transition:transform .18s ease,opacity .18s ease}
.ky-faq-icon::before{left:2px;right:2px;top:9px;height:2px}
.ky-faq-icon::after{top:2px;bottom:2px;left:9px;width:2px}
.ky-faq-item.is-open .ky-faq-icon::after{transform:scaleY(0);opacity:0}
.ky-faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .2s ease}
.ky-faq-item.is-open .ky-faq-a{grid-template-rows:1fr}
.ky-faq-a > div{overflow:hidden}
.ky-faq-a p{margin:0;padding:0 4px 20px;font-size:15px;color:var(--c-body);max-width:760px}

/* ---------- CTA ---------- */
.ky-cta{
  position:relative;background:var(--c-dark);border-radius:var(--r-lg);overflow:hidden;
  padding:44px 40px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.ky-cta::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(18,33,31,.88),rgba(18,33,31,.92)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;opacity:.9;pointer-events:none;
}
.ky-cta-inner{position:relative;z-index:2;max-width:560px}
.ky-cta h2{color:#fff;font-size:26px;margin-bottom:8px}
.ky-cta p{color:rgba(255,255,255,.72);font-size:15px;margin:0}
.ky-cta-actions{position:relative;z-index:2;display:flex;gap:12px;flex-wrap:wrap}

/* ---------- Toast ---------- */
.ky-toast{
  position:fixed;right:24px;bottom:24px;z-index:200;background:var(--c-dark);color:#fff;
  padding:12px 20px;border-radius:var(--r-pill);font-size:14px;box-shadow:var(--sh-3);
  opacity:0;transform:translateY(10px);transition:opacity .2s ease,transform .2s ease;pointer-events:none;
}
.ky-toast.is-show{opacity:1;transform:translateY(0)}

/* ---------- 页脚 ---------- */
.ky-footer{background:var(--c-dark);color:rgba(255,255,255,.62);position:relative;overflow:hidden;margin-top:var(--sec)}
.ky-footer::before{
  content:"";position:absolute;right:-60px;top:-80px;width:300px;height:300px;border-radius:50%;
  border:1px solid rgba(255,255,255,.1);pointer-events:none;
}
.ky-footer-inner{position:relative;z-index:2;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding:64px 0 40px}
.ky-footer h3{color:rgba(255,255,255,.7);font-size:14px;font-weight:600;margin-bottom:16px;letter-spacing:.5px}
.ky-footer p{font-size:14px;line-height:1.8;margin:16px 0 0;max-width:340px}
.ky-footer ul li + li{margin-top:10px}
.ky-footer a{color:rgba(255,255,255,.6);font-size:14px}
.ky-footer a:hover{color:#fff;text-decoration:none}
.ky-footer .ky-logo{color:#fff}
.ky-footer .ky-logo:hover{color:#fff}
.ky-footer-bottom{
  position:relative;z-index:2;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 30px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;
}
.ky-footer-bottom a{font-size:13px}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .ky-search{width:200px}
  .ky-menu{gap:20px}
}
@media (max-width:1023px){
  :root{--sec:64px}
  .container{padding:0 24px}
  .ky-menu,.ky-search,.ky-text-btn{display:none}
  .ky-menu-toggle{display:flex}
  .ky-header-tools .ky-btn{height:38px;padding:0 16px;font-size:14px}
  .ky-overview{grid-template-columns:1fr;gap:32px}
  .ky-layout{grid-template-columns:1fr;gap:32px}
  .ky-side{position:static}
  .ky-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ky-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ky-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ky-footer-inner{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding:48px 0 32px}
  .ky-hero h1{font-size:32px}
  .ky-numitem{grid-template-columns:48px minmax(0,1fr) 20px;gap:14px}
  .ky-num-tags{grid-column:2 / 3;justify-content:flex-start;margin-top:6px}
  .ky-num-arrow{grid-row:1 / 2;grid-column:3 / 4}
}
@media (max-width:767px){
  :root{--sec:48px}
  .container{padding:0 16px}
  .ky-header-inner{height:62px;gap:14px}
  .ky-logo{font-size:16px}
  .ky-hero-inner{padding:24px 0 34px;min-height:auto}
  .ky-hero h1{font-size:28px}
  .ky-hero-sub{font-size:15px}
  .ky-hero-actions .ky-btn{flex:1 1 100%}
  .ky-section-head h2{font-size:22px}
  .ky-flow h2{font-size:22px}
  .ky-grid-3,.ky-steps,.ky-stats{grid-template-columns:1fr}
  .ky-cta{padding:32px 22px;border-radius:var(--r-md)}
  .ky-cta h2{font-size:22px}
  .ky-cta-actions{width:100%}
  .ky-cta-actions .ky-btn{flex:1 1 100%}
  .ky-footer-inner{grid-template-columns:1fr;padding:40px 0 28px}
  .ky-footer-bottom{flex-direction:column;gap:8px}
  .ky-numitem{grid-template-columns:40px minmax(0,1fr);padding:16px 8px}
  .ky-num-tags{grid-column:2 / 3}
  .ky-num-arrow{display:none}
  .ky-num-title{font-size:16px}
  .ky-toast{left:16px;right:16px;bottom:16px;text-align:center}
}