/* roulang page: index */
:root{
  --k-bg-900:#061319;
  --k-bg-800:#0A1E27;
  --k-surface:#0F2733;
  --k-glass:rgba(18,52,63,.55);
  --k-line:rgba(120,220,200,.14);
  --k-brand-500:#17B79A;
  --k-brand-400:#3FD9B8;
  --k-brand-600:#0E8E7A;
  --k-accent:#F2B544;
  --k-ink-100:#EAF6F4;
  --k-ink-300:#A9C4C4;
  --k-ink-500:#6E8A8C;
  --k-r-card:18px;
  --k-r-glass:24px;
  --k-r-btn:12px;
  --k-sh-1:0 10px 28px rgba(0,0,0,.42);
  --k-sh-2:0 18px 44px rgba(0,0,0,.55);
  --k-sh-glow:0 0 0 1px rgba(23,183,154,.35),0 10px 30px rgba(23,183,154,.26);
  --k-ease:cubic-bezier(.2,.7,.3,1);

  --bs-primary:#17B79A;
  --bs-body-bg:#061319;
  --bs-body-color:#EAF6F4;
  --bs-border-color:rgba(120,220,200,.14);
  --bs-border-radius:18px;
  --bs-font-sans-serif:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-link-color:#3FD9B8;
  --bs-link-hover-color:#17B79A;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--k-bg-900);
  color:var(--k-ink-100);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--k-brand-400);text-decoration:none;transition:color .18s var(--k-ease)}
a:hover{color:var(--k-brand-500)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
ul,ol{padding-left:1.2em}
h1,h2,h3,h4,h5{margin:0;letter-spacing:-.2px;font-weight:700}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
:focus-visible{outline:2px solid var(--k-brand-400);outline-offset:2px}
section{position:relative}
.k-container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.k-section{padding:104px 0}
.k-section--tight{padding:76px 0}
.k-eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:1.4px;
  color:var(--k-brand-400);text-transform:uppercase;margin-bottom:14px;
}
.k-h2{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.35}
.k-lead{color:var(--k-ink-300);font-size:15px;max-width:640px;margin-top:12px}
.k-sec-head{margin-bottom:44px}
.k-sec-head .k-h2{margin-bottom:0}

/* 顶部活动条 */
.k-topbar{
  background:linear-gradient(90deg,rgba(23,183,154,.16),rgba(6,19,25,.9));
  border-bottom:1px solid var(--k-line);
  font-size:13px;
  position:relative;
  z-index:1045;
}
.k-topbar .k-container{display:flex;align-items:center;gap:14px;min-height:38px;flex-wrap:wrap}
.k-topbar-status{
  display:inline-flex;align-items:center;gap:8px;color:var(--k-ink-300);
}
.k-topbar-status .k-dot{
  width:8px;height:8px;border-radius:50%;background:var(--k-brand-400);
  box-shadow:0 0 0 4px rgba(63,217,184,.16);
}
.k-topbar-right{margin-left:auto;display:flex;align-items:center;gap:16px}
.k-countdown{display:inline-flex;align-items:center;gap:6px;color:var(--k-accent);font-variant-numeric:tabular-nums}
.k-countdown b{font-weight:700;font-size:13px}
.k-topbar-close{
  background:transparent;border:1px solid var(--k-line);border-radius:999px;
  width:24px;height:24px;line-height:1;color:var(--k-ink-300);cursor:pointer;font-size:14px;
  display:inline-flex;align-items:center;justify-content:center;transition:all .18s var(--k-ease);
}
.k-topbar-close:hover{color:var(--k-brand-400);border-color:rgba(23,183,154,.5)}

/* 导航 */
.k-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(6,19,25,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--k-line);
  transition:background .22s var(--k-ease),box-shadow .22s var(--k-ease);
}
.k-header.k-scrolled{background:rgba(4,16,26,.92);box-shadow:0 12px 30px rgba(0,0,0,.45)}
.k-nav{display:flex;align-items:center;gap:22px;min-height:72px;transition:min-height .22s var(--k-ease)}
.k-header.k-scrolled .k-nav{min-height:60px}
.k-logo{display:flex;align-items:center;gap:11px;flex-shrink:0}
.k-logo-mark{
  width:38px;height:38px;border-radius:12px;flex-shrink:0;
  background:linear-gradient(135deg,var(--k-brand-500),var(--k-brand-600));
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--k-sh-glow);
}
.k-logo-mark svg{width:20px;height:20px;fill:#04141A}
.k-logo-text{display:flex;flex-direction:column;line-height:1.15}
.k-logo-text b{font-size:16px;font-weight:800;color:var(--k-ink-100);letter-spacing:-.3px}
.k-logo-text span{font-size:11px;color:var(--k-ink-500);letter-spacing:1.6px}
.k-menu{display:flex;align-items:center;gap:6px;margin-left:14px}
.k-menu a{
  position:relative;padding:8px 12px;border-radius:10px;font-size:15px;font-weight:500;
  color:var(--k-ink-300);transition:color .18s var(--k-ease),background .18s var(--k-ease);
}
.k-menu a:hover{color:var(--k-ink-100);background:rgba(23,183,154,.08)}
.k-menu a.k-active{color:var(--k-brand-400)}
.k-menu a.k-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;
  background:var(--k-brand-400);
}
.k-nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.k-chip{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  padding:5px 11px;border-radius:999px;border:1px solid rgba(242,181,68,.45);
  color:var(--k-accent);white-space:nowrap;
}
.k-burger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--k-line);
  background:transparent;cursor:pointer;align-items:center;justify-content:center;
}
.k-burger span{display:block;width:18px;height:2px;background:var(--k-ink-100);border-radius:2px;position:relative}
.k-burger span::before,.k-burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--k-ink-100);border-radius:2px;
}
.k-burger span::before{top:-6px}
.k-burger span::after{top:6px}
.k-drawer{
  display:none;position:fixed;inset:0;z-index:1055;background:rgba(6,19,25,.97);
  backdrop-filter:blur(14px);padding:28px 24px;
}
.k-drawer.k-open{display:block}
.k-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.k-drawer-close{
  background:transparent;border:1px solid var(--k-line);border-radius:12px;color:var(--k-ink-100);
  width:42px;height:42px;font-size:20px;cursor:pointer;
}
.k-drawer nav{display:flex;flex-direction:column;gap:6px}
.k-drawer nav a{
  font-size:17px;color:var(--k-ink-100);padding:14px 12px;border-radius:12px;
  border-bottom:1px solid var(--k-line);
}
.k-drawer nav a.k-active{color:var(--k-brand-400)}
.k-drawer .btn{margin-top:22px;width:100%}

/* 按钮 */
.k-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--k-r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .18s var(--k-ease),box-shadow .18s var(--k-ease),background .18s var(--k-ease),color .18s var(--k-ease),border-color .18s var(--k-ease);
}
.k-btn-primary{
  background:linear-gradient(135deg,#17B79A,#0E8E7A);
  color:#04191A;
  box-shadow:0 0 0 1px rgba(23,183,154,.35),0 10px 30px rgba(23,183,154,.26);
}
.k-btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(63,217,184,.5),0 16px 36px rgba(23,183,154,.4);color:#04191A}
.k-btn-primary:active{transform:translateY(-1px)}
.k-btn-ghost{
  background:var(--k-glass);border-color:rgba(23,183,154,.45);color:var(--k-brand-400);
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
}
.k-btn-ghost:hover{transform:translateY(-2px);border-color:var(--k-brand-400);color:var(--k-brand-400);box-shadow:0 12px 30px rgba(0,0,0,.45)}
.k-btn-quiet{background:transparent;color:var(--k-ink-300);padding:10px 14px}
.k-btn-quiet:hover{color:var(--k-brand-400)}
.k-btn-sm{padding:10px 18px;font-size:14px}

/* Hero */
.k-hero{padding:88px 0 96px;overflow:hidden}
.k-hero::before{
  content:"";position:absolute;top:-220px;right:-160px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(23,183,154,.20),transparent 68%);pointer-events:none;
}
.k-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,220,200,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(120,220,200,.045) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 72%);
}
.k-hero .k-container{position:relative;z-index:2}
.k-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.k-badge-line{
  display:inline-flex;align-items:center;gap:9px;padding:7px 14px;border-radius:999px;
  background:var(--k-glass);border:1px solid var(--k-line);font-size:13px;color:var(--k-ink-300);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);margin-bottom:22px;
}
.k-badge-line .k-dot{width:7px;height:7px;border-radius:50%;background:var(--k-brand-400);box-shadow:0 0 0 4px rgba(63,217,184,.14)}
.k-hero h1{
  font-size:clamp(30px,5vw,54px);font-weight:800;line-height:1.18;letter-spacing:-.5px;
  margin-bottom:18px;
}
.k-hero h1 em{font-style:normal;color:var(--k-brand-400)}
.k-hero-sub{font-size:17px;color:var(--k-ink-300);max-width:520px;margin-bottom:30px}
.k-hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:38px}
.k-stats{display:flex;gap:38px;flex-wrap:wrap;padding-top:26px;border-top:1px solid var(--k-line)}
.k-stat b{display:block;font-size:30px;font-weight:800;color:var(--k-ink-100);line-height:1.15;font-variant-numeric:tabular-nums}
.k-stat b i{font-style:normal;font-size:14px;font-weight:600;color:var(--k-ink-500);margin-left:4px}
.k-stat span{font-size:13px;color:var(--k-ink-500)}
.k-hero-card{
  background:var(--k-glass);border:1px solid var(--k-line);border-radius:var(--k-r-glass);
  padding:18px;backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--k-sh-2);position:relative;
}
.k-hero-card-img{position:relative;border-radius:18px;overflow:hidden;border:1px solid rgba(23,183,154,.28)}
.k-hero-card-img img{width:100%;aspect-ratio:16/10;object-fit:cover}
.k-hero-card-img::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(6,19,25,.85) 0%,rgba(6,19,25,.15) 60%,transparent 100%);
}
.k-hero-card-tag{
  position:absolute;top:14px;left:14px;z-index:2;font-size:12px;font-weight:600;
  padding:5px 11px;border-radius:999px;background:rgba(6,19,25,.72);border:1px solid rgba(23,183,154,.5);
  color:var(--k-brand-400);backdrop-filter:blur(8px);
}
.k-hero-card-cap{
  position:absolute;left:16px;right:16px;bottom:14px;z-index:2;
}
.k-hero-card-cap strong{display:block;font-size:17px;font-weight:700;color:#fff;margin-bottom:3px}
.k-hero-card-cap span{font-size:13px;color:var(--k-ink-300)}
.k-hero-card-list{margin-top:16px;display:grid;gap:10px}
.k-hero-row{
  display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;
  background:rgba(6,19,25,.5);border:1px solid var(--k-line);
}
.k-hero-row i{
  font-style:normal;width:26px;height:26px;border-radius:8px;flex-shrink:0;
  background:rgba(23,183,154,.16);color:var(--k-brand-400);font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.k-hero-row p{margin:0;font-size:14px;color:var(--k-ink-300)}

/* 通用卡片 */
.k-grid{display:grid;gap:20px}
.k-card{
  background:var(--k-surface);border:1px solid var(--k-line);border-radius:var(--k-r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s var(--k-ease),border-color .2s var(--k-ease),box-shadow .2s var(--k-ease);
}
.k-card:hover{transform:translateY(-4px);border-color:rgba(23,183,154,.5);box-shadow:var(--k-sh-2)}
.k-card-img{position:relative;overflow:hidden;aspect-ratio:16/10;background:linear-gradient(135deg,#0E2C36,#0A1E27)}
.k-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--k-ease)}
.k-card:hover .k-card-img img{transform:scale(1.04)}
.k-card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.k-card-body h3{font-size:19px;font-weight:600;margin-bottom:10px}
.k-card-body p{color:var(--k-ink-300);font-size:14px;margin-bottom:16px}
.k-card-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px solid var(--k-line);
}
.k-spec{font-size:13px;color:var(--k-ink-500)}
.k-price{font-size:15px;font-weight:700;color:var(--k-brand-400);text-align:right}
.k-tag{
  display:inline-flex;align-items:center;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;
  background:rgba(23,183,154,.13);color:var(--k-brand-400);border:1px solid rgba(23,183,154,.28);
}
.k-tag-accent{background:rgba(242,181,68,.12);color:var(--k-accent);border-color:rgba(242,181,68,.32)}

/* 爆款错落网格 */
.k-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.k-feature-grid .k-card:first-child{grid-column:span 2}
.k-feature-grid .k-card:first-child .k-card-img{aspect-ratio:21/10}

/* 评价轮播 */
.k-review-section{background:var(--k-bg-800)}
.k-review-card{
  background:var(--k-glass);border:1px solid var(--k-line);border-radius:var(--k-r-glass);
  padding:28px;backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  height:100%;
}
.k-review-top{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.k-avatar{
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--k-brand-500),var(--k-brand-600));
  display:flex;align-items:center;justify-content:center;font-weight:700;color:#04191A;font-size:17px;
}
.k-review-top strong{display:block;font-size:15px;font-weight:600}
.k-review-top span{display:block;font-size:13px;color:var(--k-ink-500)}
.k-stars{color:var(--k-accent);font-size:13px;letter-spacing:2px;margin-bottom:10px}
.k-review-card p{font-size:15px;color:var(--k-ink-300);margin:0}
.k-carousel{padding-bottom:56px}
.k-carousel .carousel-indicators{margin-bottom:0;bottom:0;gap:8px}
.k-carousel .carousel-indicators [data-bs-target]{
  width:26px;height:4px;border-radius:999px;background:rgba(120,220,200,.24);
  border:0;opacity:1;margin:0;transition:background .2s var(--k-ease),width .2s var(--k-ease);
}
.k-carousel .carousel-indicators .active{background:var(--k-brand-500);width:38px}
.k-carousel .carousel-control-prev,.k-carousel .carousel-control-next{display:none}

/* 保障条 */
.k-guard{
  background:var(--k-surface);border:1px solid var(--k-line);border-radius:var(--k-r-card);
  display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden;
}
.k-guard-item{padding:26px 24px;border-right:1px solid var(--k-line);display:flex;gap:14px;align-items:flex-start}
.k-guard-item:last-child{border-right:0}
.k-guard-icon{
  width:38px;height:38px;border-radius:12px;flex-shrink:0;
  background:rgba(23,183,154,.13);border:1px solid rgba(23,183,154,.28);
  display:flex;align-items:center;justify-content:center;color:var(--k-brand-400);
}
.k-guard-icon svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.k-guard-item strong{display:block;font-size:14px;font-weight:600;margin-bottom:4px}
.k-guard-item span{display:block;font-size:13px;color:var(--k-ink-500);line-height:1.65}

/* CTA 表单 */
.k-cta-band{
  background:linear-gradient(135deg,rgba(14,142,122,.22),rgba(10,30,39,.9) 55%);
  border:1px solid rgba(23,183,154,.28);border-radius:var(--k-r-glass);padding:48px;
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
  box-shadow:var(--k-sh-1);
}
.k-cta-band h2{font-size:clamp(22px,3vw,30px);margin-bottom:14px}
.k-cta-band p{color:var(--k-ink-300);font-size:15px;max-width:440px}
.k-form-panel{
  background:var(--k-glass);border:1px solid var(--k-line);border-radius:var(--k-r-glass);
  padding:26px;backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
}
.k-field{margin-bottom:16px}
.k-field label{display:block;font-size:13px;color:var(--k-ink-300);margin-bottom:7px}
.k-input,.k-select{
  width:100%;background:#0B222C;border:1px solid var(--k-line);border-radius:12px;
  padding:12px 14px;color:var(--k-ink-100);outline:none;
  transition:border-color .18s var(--k-ease),box-shadow .18s var(--k-ease);
}
.k-input::placeholder{color:var(--k-ink-500)}
.k-input:focus,.k-select:focus{border-color:var(--k-brand-500);box-shadow:0 0 0 4px rgba(23,183,154,.18)}
.k-form-note{font-size:12px;color:var(--k-ink-500);margin-top:12px}

/* 最新信息 */
.k-filter{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.k-filter button{
  background:transparent;border:1px solid var(--k-line);border-radius:999px;padding:7px 16px;
  font-size:13px;color:var(--k-ink-300);cursor:pointer;transition:all .18s var(--k-ease);
}
.k-filter button:hover{color:var(--k-brand-400);border-color:rgba(23,183,154,.45)}
.k-filter button.k-on{background:rgba(23,183,154,.14);border-color:rgba(23,183,154,.5);color:var(--k-brand-400);font-weight:600}
.k-post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.k-post-grid .k-card:first-child{grid-column:span 2}
.k-post-grid .k-card:first-child .k-card-img{aspect-ratio:21/10}
.k-post-title{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.k-post-sum{font-size:14px;color:var(--k-ink-300);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.k-post-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--k-line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.k-post-foot time{font-size:13px;color:var(--k-ink-500)}
.k-empty{
  border:1px dashed rgba(120,220,200,.28);border-radius:var(--k-r-card);padding:46px 24px;
  text-align:center;color:var(--k-ink-300);background:rgba(15,39,51,.5);
}
.k-empty p{margin-bottom:16px;font-size:15px}

/* FAQ */
.k-faq{max-width:880px;margin:0 auto}
.k-faq .accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--k-line);border-radius:0;
}
.k-faq .accordion-button{
  background:transparent;color:var(--k-ink-100);font-size:16px;font-weight:600;
  padding:22px 44px 22px 0;box-shadow:none;line-height:1.6;
}
.k-faq .accordion-button:not(.collapsed){color:var(--k-brand-400);background:rgba(23,183,154,.05)}
.k-faq .accordion-button:focus{box-shadow:none;border-color:transparent}
.k-faq .accordion-button::after{
  background-image:none;content:"+";font-size:20px;font-weight:400;color:var(--k-brand-400);
  width:22px;height:22px;line-height:20px;text-align:center;position:absolute;right:0;top:50%;
  transform:translateY(-50%);transition:transform .24s var(--k-ease);margin:0;
}
.k-faq .accordion-button:not(.collapsed)::after{content:"–";transform:translateY(-50%) rotate(180deg)}
.k-faq .accordion-body{padding:0 0 24px;color:var(--k-ink-300);font-size:15px;line-height:1.8}

/* 页脚 */
.k-footer{background:#04101A;border-top:1px solid var(--k-line);padding:72px 0 0;margin-top:104px}
.k-footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px}
.k-footer h4{font-size:15px;font-weight:600;margin-bottom:18px}
.k-footer p{font-size:14px;color:var(--k-ink-500);line-height:1.8}
.k-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:11px}
.k-footer ul a{font-size:14px;color:var(--k-ink-300)}
.k-footer ul a:hover{color:var(--k-brand-400)}
.k-footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.k-footer-qr{
  width:92px;height:92px;border-radius:14px;border:1px solid var(--k-line);
  background:linear-gradient(135deg,#0E2C36,#0A1E27);display:flex;align-items:center;justify-content:center;
  font-size:12px;color:var(--k-ink-500);text-align:center;line-height:1.4;margin-top:12px;
}
.k-footer-bottom{
  margin-top:56px;border-top:1px solid var(--k-line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--k-ink-500);
}
.k-footer-bottom a{color:var(--k-ink-500)}
.k-footer-bottom a:hover{color:var(--k-brand-400)}

/* 动效与响应式 */
@media (max-width:1199px){
  .k-hero-grid{gap:40px}
  .k-cta-band{padding:40px;gap:32px}
}
@media (max-width:991px){
  .k-section{padding:76px 0}
  .k-section--tight{padding:60px 0}
  .k-menu,.k-nav-right .k-chip{display:none}
  .k-burger{display:inline-flex}
  .k-hero{padding:64px 0 72px}
  .k-hero-grid{grid-template-columns:1fr;gap:36px}
  .k-hero-sub{max-width:none}
  .k-feature-grid{grid-template-columns:repeat(2,1fr)}
  .k-feature-grid .k-card:first-child{grid-column:span 2}
  .k-post-grid{grid-template-columns:repeat(2,1fr)}
  .k-post-grid .k-card:first-child{grid-column:span 2}
  .k-guard{grid-template-columns:repeat(2,1fr)}
  .k-guard-item:nth-child(2){border-right:0}
  .k-guard-item:nth-child(1),.k-guard-item:nth-child(2){border-bottom:1px solid var(--k-line)}
  .k-cta-band{grid-template-columns:1fr}
  .k-footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:767px){
  .k-container{padding:0 16px}
  .k-section{padding:56px 0}
  .k-section--tight{padding:48px 0}
  .k-hero h1{font-size:clamp(27px,8vw,34px)}
  .k-hero-actions{gap:10px}
  .k-hero-actions .k-btn{flex:1 1 auto;min-width:140px}
  .k-stats{gap:22px}
  .k-stat b{font-size:24px}
  .k-feature-grid,.k-post-grid{grid-template-columns:1fr}
  .k-feature-grid .k-card:first-child,.k-post-grid .k-card:first-child{grid-column:span 1}
  .k-feature-grid .k-card:first-child .k-card-img,.k-post-grid .k-card:first-child .k-card-img{aspect-ratio:16/10}
  .k-guard{grid-template-columns:1fr}
  .k-guard-item{border-right:0;border-bottom:1px solid var(--k-line)}
  .k-guard-item:last-child{border-bottom:0}
  .k-cta-band{padding:26px 20px}
  .k-form-panel{padding:20px}
  .k-form-panel .k-btn{width:100%}
  .k-footer{padding-top:52px;margin-top:56px}
  .k-footer-grid{grid-template-columns:1fr}
  .k-footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .k-topbar .k-container{gap:10px}
  .k-topbar-right{margin-left:0;width:100%;justify-content:space-between}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .k-card:hover,.k-btn:hover{transform:none}
  .k-card:hover .k-card-img img{transform:none}
}

/* roulang page: article */
:root{
  --k-bg-900:#061319;
  --k-bg-800:#0A1E27;
  --k-surface:#0F2733;
  --k-glass:rgba(18,52,63,.55);
  --k-line:rgba(120,220,200,.14);
  --k-brand-500:#17B79A;
  --k-brand-400:#3FD9B8;
  --k-brand-600:#0E8E7A;
  --k-accent:#F2B544;
  --k-ink-100:#EAF6F4;
  --k-ink-300:#A9C4C4;
  --k-ink-500:#6E8A8C;
  --k-r-card:18px;
  --k-r-glass:24px;
  --k-r-btn:12px;
  --k-shadow-1:0 10px 28px rgba(0,0,0,.42);
  --k-shadow-2:0 18px 44px rgba(0,0,0,.55);
  --k-glow:0 0 0 1px rgba(23,183,154,.35), 0 10px 30px rgba(23,183,154,.26);
  --k-ease:cubic-bezier(.2,.7,.3,1);
  --k-font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--k-bg-900);
  color:var(--k-ink-100);
  font-family:var(--k-font);
  font-size:16px;
  line-height:1.8;
  overflow-x:hidden;
  --bs-body-bg:var(--k-bg-900);
  --bs-body-color:var(--k-ink-100);
  --bs-border-color:var(--k-line);
  --bs-border-radius:12px;
  --bs-primary:#17B79A;
  --bs-link-color:#3FD9B8;
  --bs-link-hover-color:#3FD9B8;
  --bs-font-sans-serif:var(--k-font);
}
img{max-width:100%;display:block;}
a{color:var(--k-brand-400);text-decoration:none;transition:color .18s var(--k-ease);}
a:hover{color:var(--k-brand-500);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.35;color:var(--k-ink-100);}
p{margin:0 0 1em;}
ul,ol{margin:0;}
.k-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 按钮体系 ---------- */
.k-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;border-radius:var(--k-r-btn);
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--k-ease),box-shadow .18s var(--k-ease),background .18s var(--k-ease),color .18s var(--k-ease),border-color .18s var(--k-ease);
  white-space:nowrap;
}
.k-btn:focus-visible{outline:2px solid var(--k-brand-400);outline-offset:2px;}
.k-btn-primary{background:linear-gradient(135deg,#17B79A,#0E8E7A);color:#03181A;box-shadow:var(--k-glow);}
.k-btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(23,183,154,.6),0 16px 36px rgba(23,183,154,.34);color:#02100F;}
.k-btn-primary:active{transform:translateY(1px);}
.k-btn-ghost{background:var(--k-glass);border-color:var(--k-line);color:var(--k-brand-400);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);}
.k-btn-ghost:hover{transform:translateY(-2px);border-color:rgba(23,183,154,.55);color:var(--k-brand-400);box-shadow:var(--k-shadow-1);}
.k-btn-ghost:active{transform:translateY(1px);}
.k-btn-plain{background:transparent;color:var(--k-ink-300);}
.k-btn-plain:hover{color:var(--k-brand-400);}
.k-btn-sm{padding:10px 18px;font-size:14px;}

/* ---------- 导航 ---------- */
.k-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(6,19,25,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--k-line);
  transition:background .25s var(--k-ease);
}
.k-nav{display:flex;align-items:center;gap:24px;height:72px;transition:height .25s var(--k-ease);}
.k-header.k-scrolled{background:rgba(4,16,22,.92);}
.k-header.k-scrolled .k-nav{height:60px;}
.k-logo{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.k-logo-mark{
  width:38px;height:38px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#17B79A,#0E8E7A);
  box-shadow:0 0 0 1px rgba(23,183,154,.35),0 8px 20px rgba(23,183,154,.25);
}
.k-logo-mark svg{width:22px;height:22px;fill:#03181A;}
.k-logo-text{display:flex;flex-direction:column;line-height:1.15;}
.k-logo-text b{font-size:17px;font-weight:800;color:var(--k-ink-100);letter-spacing:.2px;}
.k-logo-text span{font-size:10px;letter-spacing:2px;color:var(--k-ink-500);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;}
.k-menu{display:flex;align-items:center;gap:6px;flex:1;margin-left:8px;}
.k-menu a{
  position:relative;
  font-size:15px;font-weight:500;color:var(--k-ink-300);
  padding:8px 12px;border-radius:10px;
  transition:color .18s var(--k-ease),background .18s var(--k-ease);
}
.k-menu a:hover{color:var(--k-ink-100);background:rgba(23,183,154,.08);}
.k-menu a.k-active{color:var(--k-brand-400);}
.k-menu a.k-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  border-radius:2px;background:var(--k-brand-500);
}
.k-nav-right{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.k-chip{
  font-size:12px;font-weight:600;color:var(--k-accent);
  border:1px solid rgba(242,181,68,.45);border-radius:999px;
  padding:5px 12px;white-space:nowrap;
}
.k-burger{
  display:none;width:42px;height:42px;border-radius:12px;
  background:var(--k-glass);border:1px solid var(--k-line);cursor:pointer;
  align-items:center;justify-content:center;padding:0;
}
.k-burger span{display:block;width:18px;height:2px;background:var(--k-ink-100);border-radius:2px;position:relative;}
.k-burger span::before,.k-burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--k-ink-100);border-radius:2px;}
.k-burger span::before{top:-6px;}
.k-burger span::after{top:6px;}
.k-drawer{
  position:fixed;inset:0;z-index:1200;
  background:rgba(6,19,25,.97);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  display:none;padding:96px 24px 40px;
}
.k-drawer.k-open{display:block;}
.k-drawer a{
  display:block;font-size:17px;font-weight:600;color:var(--k-ink-100);
  padding:16px 4px;border-bottom:1px solid var(--k-line);
}
.k-drawer a.k-active{color:var(--k-brand-400);}
.k-drawer .k-btn{width:100%;margin-top:26px;}
.k-drawer-close{
  position:absolute;top:22px;right:24px;width:42px;height:42px;border-radius:12px;
  background:var(--k-glass);border:1px solid var(--k-line);color:var(--k-ink-100);
  font-size:20px;line-height:1;cursor:pointer;
}

/* ---------- 面包屑 ---------- */
.k-crumb-wrap{padding-top:26px;}
.k-crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--k-ink-500);
}
.k-crumb a{color:var(--k-ink-500);}
.k-crumb a:hover{color:var(--k-brand-400);}
.k-crumb span.k-sep{color:rgba(110,138,140,.7);}
.k-crumb .k-crumb-cur{
  color:var(--k-ink-300);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ---------- 文章头 ---------- */
.k-article-head{padding:34px 0 8px;}
.k-article-head-inner{max-width:820px;margin:0 auto;}
.k-cat-pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--k-brand-400);
  background:rgba(23,183,154,.10);border:1px solid rgba(23,183,154,.3);
  border-radius:999px;padding:6px 14px;margin-bottom:18px;
}
.k-article-head h1{
  font-size:clamp(28px,4.4vw,44px);font-weight:800;letter-spacing:-.5px;line-height:1.3;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:18px;
}
.k-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px 22px;
  font-size:13px;color:var(--k-ink-500);
  padding-bottom:24px;border-bottom:1px solid var(--k-line);
}
.k-meta i{font-style:normal;color:var(--k-ink-300);}
.k-meta .k-dot{width:4px;height:4px;border-radius:50%;background:rgba(110,138,140,.6);display:inline-block;}

/* ---------- 正文 ---------- */
.k-post-wrap{padding:40px 0 8px;}
.k-post-body{
  max-width:800px;margin:0 auto;
  font-size:17px;line-height:1.9;color:var(--k-ink-100);
  overflow-wrap:break-word;word-wrap:break-word;
}
.k-post-body p{margin:0 0 1.2em;}
.k-post-body h2{
  font-size:clamp(22px,2.6vw,28px);font-weight:700;
  margin:2.2em 0 .8em;padding-left:14px;border-left:4px solid var(--k-brand-500);
}
.k-post-body h2:first-child{margin-top:.2em;}
.k-post-body h3{font-size:20px;font-weight:600;margin:1.8em 0 .6em;display:flex;align-items:center;gap:10px;}
.k-post-body h3::before{
  content:"";width:8px;height:8px;border-radius:2px;background:var(--k-brand-500);flex-shrink:0;
}
.k-post-body h4{font-size:17px;font-weight:600;margin:1.5em 0 .5em;color:var(--k-brand-400);}
.k-post-body ul,.k-post-body ol{padding-left:1.4em;margin:0 0 1.2em;}
.k-post-body li{margin-bottom:.5em;}
.k-post-body ul li::marker{color:var(--k-brand-500);}
.k-post-body ol li::marker{color:var(--k-brand-400);font-weight:600;}
.k-post-body blockquote{
  margin:1.6em 0;padding:18px 22px;
  border-left:3px solid var(--k-brand-500);
  background:var(--k-glass);border-radius:14px;
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  color:var(--k-ink-300);
}
.k-post-body blockquote p:last-child{margin-bottom:0;}
.k-post-body img{margin:1.7em auto;border-radius:14px;border:1px solid var(--k-line);}
.k-post-body figure{margin:1.7em 0;}
.k-post-body figcaption{font-size:13px;color:var(--k-ink-500);text-align:center;margin-top:10px;}
.k-post-body table{
  width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;
  border:1px solid var(--k-line);border-radius:14px;overflow:hidden;
}
.k-post-body th,.k-post-body td{padding:12px 14px;border:1px solid var(--k-line);text-align:left;vertical-align:top;}
.k-post-body thead th{background:rgba(23,183,154,.10);color:var(--k-ink-100);font-weight:600;}
.k-post-body tbody tr:nth-child(even){background:rgba(255,255,255,.024);}
.k-post-body pre{
  background:#04101A;border:1px solid var(--k-line);border-radius:14px;
  padding:16px 18px;overflow-x:auto;margin:1.6em 0;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;line-height:1.7;
}
.k-post-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;background:rgba(23,183,154,.12);color:var(--k-brand-400);
  padding:2px 6px;border-radius:6px;
}
.k-post-body pre code{background:none;padding:0;color:var(--k-ink-100);}
.k-post-body hr{border:0;border-top:1px solid var(--k-line);margin:2.2em 0;}
.k-post-body a{border-bottom:1px solid rgba(63,217,184,.4);}
.k-post-body a:hover{border-bottom-color:var(--k-brand-500);}

/* ---------- 文章空态 ---------- */
.k-empty{
  max-width:800px;margin:0 auto;text-align:center;
  background:var(--k-surface);border:1px solid var(--k-line);
  border-radius:var(--k-r-glass);padding:64px 28px;box-shadow:var(--k-shadow-1);
}
.k-empty h2{font-size:24px;font-weight:700;margin-bottom:12px;}
.k-empty p{color:var(--k-ink-300);margin-bottom:26px;}

/* ---------- 标签与操作 ---------- */
.k-post-foot{max-width:800px;margin:0 auto;padding:34px 0 0;}
.k-tags{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding-bottom:26px;border-bottom:1px solid var(--k-line);}
.k-tags .k-tag{
  font-size:13px;color:var(--k-ink-300);
  background:var(--k-surface);border:1px solid var(--k-line);
  border-radius:999px;padding:6px 14px;
  transition:color .18s var(--k-ease),border-color .18s var(--k-ease);
}
.k-tags .k-tag:hover{color:var(--k-brand-400);border-color:rgba(23,183,154,.45);}
.k-actions{display:flex;flex-wrap:wrap;gap:12px;padding:24px 0 0;}

/* ---------- 相关推荐 ---------- */
.k-related{padding:104px 0 0;}
.k-sec-head{max-width:760px;margin-bottom:38px;}
.k-sec-head h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:12px;}
.k-sec-head p{color:var(--k-ink-300);font-size:15px;margin:0;}
.k-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.k-card{
  display:flex;flex-direction:column;
  background:var(--k-surface);border:1px solid var(--k-line);
  border-radius:var(--k-r-card);overflow:hidden;
  box-shadow:var(--k-shadow-1);
  transition:transform .2s var(--k-ease),border-color .2s var(--k-ease),box-shadow .2s var(--k-ease);
}
.k-card:hover{transform:translateY(-4px);border-color:rgba(23,183,154,.45);box-shadow:var(--k-shadow-2);}
.k-card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,#0F2733,#0A1E27);}
.k-card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s var(--k-ease);}
.k-card:hover .k-card-media img{transform:scale(1.04);}
.k-card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.k-card-body h3{font-size:18px;font-weight:600;line-height:1.5;}
.k-card-body p{font-size:14px;color:var(--k-ink-300);margin:0;}
.k-card-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--k-line);
  font-size:13px;color:var(--k-ink-500);
}
.k-card-meta .k-card-cat{
  font-size:12px;color:var(--k-brand-400);
  background:rgba(23,183,154,.10);border:1px solid rgba(23,183,154,.28);
  border-radius:999px;padding:4px 10px;
}

/* ---------- CTA ---------- */
.k-cta{padding:104px 0 0;}
.k-cta-panel{
  position:relative;overflow:hidden;
  background:var(--k-glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--k-line);border-radius:var(--k-r-glass);
  padding:54px 48px;
  box-shadow:var(--k-shadow-1);
}
.k-cta-panel::after{
  content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(23,183,154,.30),transparent 68%);pointer-events:none;
}
.k-cta-flex{display:flex;align-items:center;justify-content:space-between;gap:38px;position:relative;z-index:2;}
.k-cta-flex h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:12px;}
.k-cta-flex p{color:var(--k-ink-300);margin:0;max-width:56ch;}
.k-cta-btns{display:flex;gap:14px;flex-wrap:wrap;flex-shrink:0;}

/* ---------- 页脚 ---------- */
.k-footer{margin-top:104px;background:#04101A;border-top:1px solid var(--k-line);padding:64px 0 0;}
.k-footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:38px;}
.k-footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.k-footer-grid p{font-size:14px;color:var(--k-ink-300);line-height:1.8;margin:0;}
.k-footer-grid h4{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--k-ink-100);}
.k-footer-grid ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px;}
.k-footer-grid ul a{font-size:14px;color:var(--k-ink-300);}
.k-footer-grid ul a:hover{color:var(--k-brand-400);}
.k-footer-qr{
  margin-top:16px;width:120px;height:120px;border-radius:14px;
  border:1px dashed var(--k-line);background:rgba(23,183,154,.06);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;color:var(--k-ink-500);line-height:1.6;
}
.k-footer-bottom{
  margin-top:52px;padding:22px 0;border-top:1px solid var(--k-line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--k-ink-500);
}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .k-container{padding:0 22px;}
}
@media (max-width:992px){
  .k-menu{display:none;}
  .k-burger{display:inline-flex;}
  .k-nav-right .k-chip{display:none;}
  .k-nav{height:64px;}
  .k-header.k-scrolled .k-nav{height:58px;}
  .k-grid-3{grid-template-columns:repeat(2,1fr);}
  .k-related,.k-cta{padding-top:76px;}
  .k-footer{margin-top:76px;}
  .k-footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .k-cta-flex{flex-direction:column;align-items:flex-start;}
  .k-cta-panel{padding:40px 32px;}
  .k-post-body{font-size:16.5px;}
}
@media (max-width:768px){
  .k-container{padding:0 16px;}
  .k-grid-3{grid-template-columns:1fr;}
  .k-related,.k-cta{padding-top:56px;}
  .k-footer{margin-top:56px;padding-top:48px;}
  .k-footer-grid{grid-template-columns:1fr;gap:30px;}
  .k-footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .k-logo-text b{font-size:15.5px;}
  .k-article-head{padding:24px 0 4px;}
  .k-post-wrap{padding:28px 0 0;}
  .k-post-body{font-size:16px;line-height:1.85;}
  .k-cta-panel{padding:32px 22px;}
  .k-cta-btns{width:100%;}
  .k-cta-btns .k-btn{flex:1;min-width:140px;}
  .k-card-body{padding:18px;}
  .k-breadcrumb,.k-crumb .k-crumb-cur{max-width:26ch;}
}
@media (max-width:520px){
  .k-btn{padding:13px 20px;}
  .k-article-head h1{font-size:26px;}
  .k-actions .k-btn{width:100%;}
  .k-footer-qr{width:100%;max-width:180px;}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
  .k-card:hover,.k-btn:hover{transform:none !important;}
}

/* roulang page: category1 */
:root{
  --k-bg-900:#061319;
  --k-bg-800:#0A1E27;
  --k-surface:#0F2733;
  --k-glass:rgba(18,52,63,0.55);
  --k-line:rgba(120,220,200,0.14);
  --k-brand-500:#17B79A;
  --k-brand-400:#3FD9B8;
  --k-brand-600:#0E8E7A;
  --k-accent:#F2B544;
  --k-ink-100:#EAF6F4;
  --k-ink-300:#A9C4C4;
  --k-ink-500:#6E8A8C;
  --k-r-card:18px;
  --k-r-glass:24px;
  --k-r-btn:12px;
  --k-shadow-1:0 10px 28px rgba(0,0,0,.42);
  --k-shadow-2:0 18px 44px rgba(0,0,0,.55);
  --k-glow:0 0 0 1px rgba(23,183,154,.35), 0 10px 30px rgba(23,183,154,.26);
  --k-font:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --k-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --bs-body-bg:var(--k-bg-900);
  --bs-body-color:var(--k-ink-100);
  --bs-primary:#17B79A;
  --bs-border-color:var(--k-line);
  --bs-border-radius:18px;
  --bs-font-sans-serif:var(--k-font);
  --bs-link-color:#3FD9B8;
  --bs-link-hover-color:#17B79A;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--k-font);
  font-size:16px;
  line-height:1.8;
  color:var(--k-ink-100);
  background:var(--k-bg-900);
  background-image:
    radial-gradient(900px 520px at 12% -8%, rgba(23,183,154,.16), transparent 62%),
    radial-gradient(760px 460px at 92% 4%, rgba(23,183,154,.09), transparent 66%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--k-brand-400);text-decoration:none;transition:color .18s cubic-bezier(.2,.7,.3,1);}
a:hover{color:var(--k-brand-500);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{color:var(--k-ink-100);margin:0;line-height:1.35;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--k-brand-400);outline-offset:2px;border-radius:6px;}
.k-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- header / nav ---------- */
.k-header{
  position:sticky;top:0;z-index:1030;
  background:var(--k-glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--k-line);
  transition:background .22s ease, box-shadow .22s ease;
}
.k-header.k-scrolled{background:rgba(6,19,25,.92);box-shadow:0 10px 30px rgba(0,0,0,.45);}
.k-nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;transition:height .22s ease;}
.k-header.k-scrolled .k-nav{height:60px;}
.k-logo{display:flex;align-items:center;gap:10px;color:var(--k-ink-100);}
.k-logo:hover{color:var(--k-ink-100);}
.k-logo-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--k-brand-500),var(--k-brand-600));
  box-shadow:0 0 0 1px rgba(23,183,154,.35), 0 8px 22px rgba(23,183,154,.28);
}
.k-logo-mark svg{width:22px;height:22px;fill:#04191A;}
.k-logo-text{display:flex;flex-direction:column;line-height:1.15;}
.k-logo-text b{font-size:16px;font-weight:700;letter-spacing:.2px;}
.k-logo-text span{font-size:11px;letter-spacing:1.6px;color:var(--k-ink-500);font-family:var(--k-mono);}
.k-menu{display:flex;align-items:center;gap:6px;}
.k-menu a{
  position:relative;display:inline-block;padding:8px 14px;border-radius:10px;
  font-size:15px;font-weight:600;color:var(--k-ink-300);
}
.k-menu a:hover{color:var(--k-ink-100);background:rgba(23,183,154,.09);}
.k-menu a.k-active{color:var(--k-brand-400);}
.k-menu a.k-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--k-brand-500);box-shadow:0 0 10px rgba(23,183,154,.7);
}
.k-nav-right{display:flex;align-items:center;gap:12px;}
.k-chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--k-accent);
  border:1px solid rgba(242,181,68,.45);background:rgba(242,181,68,.08);
  padding:5px 12px;border-radius:999px;white-space:nowrap;
}
.k-chip::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--k-accent);box-shadow:0 0 8px rgba(242,181,68,.9);}
.k-burger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--k-line);
  background:rgba(15,39,51,.7);cursor:pointer;position:relative;
}
.k-burger span,.k-burger span::before,.k-burger span::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  width:18px;height:2px;border-radius:2px;background:var(--k-ink-100);transition:.2s;
}
.k-burger span{top:50%;margin-top:-1px;}
.k-burger span::before{top:-6px;}
.k-burger span::after{top:6px;}

/* ---------- buttons ---------- */
.k-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:13px 24px;border-radius:var(--k-r-btn);border:1px solid transparent;
  cursor:pointer;transition:transform .18s cubic-bezier(.2,.7,.3,1), box-shadow .18s, background .18s, color .18s;
}
.k-btn:active{transform:translateY(1px);}
.k-btn-primary{
  background:linear-gradient(135deg,var(--k-brand-500),var(--k-brand-600));
  color:#04191A;box-shadow:var(--k-glow);
}
.k-btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(23,183,154,.5),0 16px 36px rgba(23,183,154,.4);color:#04191A;}
.k-btn-ghost{
  background:rgba(18,52,63,.5);border-color:rgba(23,183,154,.45);color:var(--k-brand-400);
  backdrop-filter:blur(10px);
}
.k-btn-ghost:hover{transform:translateY(-2px);color:var(--k-brand-400);border-color:var(--k-brand-500);box-shadow:0 12px 28px rgba(23,183,154,.2);}
.k-btn-sm{padding:10px 18px;font-size:14px;}

/* ---------- page head ---------- */
.k-pagehead{position:relative;padding:48px 0 40px;}
.k-pagehead-panel{
  position:relative;overflow:hidden;
  border-radius:var(--k-r-glass);
  border:1px solid var(--k-line);
  background:var(--k-glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  padding:34px 36px;
  box-shadow:var(--k-shadow-1);
}
.k-pagehead-panel::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.22;pointer-events:none;
}
.k-pagehead-panel > *{position:relative;z-index:1;}
.k-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--k-ink-500);margin-bottom:14px;}
.k-crumb a{color:var(--k-ink-300);}
.k-crumb a:hover{color:var(--k-brand-400);}
.k-crumb span{color:var(--k-ink-500);}
.k-crumb em{font-style:normal;color:var(--k-ink-500);}
.k-pagehead h1{font-size:clamp(26px,3.6vw,42px);font-weight:800;letter-spacing:-.5px;max-width:900px;}
.k-pagehead-desc{margin:14px 0 0;max-width:760px;color:var(--k-ink-300);font-size:16px;}

/* ---------- anchor nav ---------- */
.k-anchor{
  display:flex;flex-wrap:wrap;gap:10px;padding:0 0 8px;
}
.k-anchor-item{
  display:inline-flex;align-items:center;
  padding:9px 18px;border-radius:999px;font-size:14px;font-weight:600;
  color:var(--k-ink-300);border:1px solid var(--k-line);background:rgba(15,39,51,.7);
  transition:.18s cubic-bezier(.2,.7,.3,1);
}
.k-anchor-item:hover{color:var(--k-ink-100);border-color:rgba(23,183,154,.45);transform:translateY(-2px);}
.k-anchor-item.k-active{
  color:#04191A;background:linear-gradient(135deg,var(--k-brand-500),var(--k-brand-600));
  border-color:transparent;box-shadow:var(--k-glow);
}
.k-anchor-item.k-active:hover{color:#04191A;}

/* ---------- sections ---------- */
.k-section{padding:84px 0;}
.k-section-tight{padding:56px 0;}
.k-sec-head{max-width:760px;margin-bottom:40px;}
.k-sec-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;letter-spacing:-.3px;}
.k-sec-head p{margin:12px 0 0;color:var(--k-ink-300);font-size:16px;}
.k-eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:1px;
  color:var(--k-brand-400);text-transform:uppercase;margin-bottom:10px;font-family:var(--k-mono);
}

/* ---------- feature rows ---------- */
.k-feature{
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
  padding:26px 0;
}
.k-feature + .k-feature{border-top:1px solid var(--k-line);}
.k-feature-media{
  position:relative;border-radius:var(--k-r-card);overflow:hidden;
  border:1px solid rgba(23,183,154,.24);box-shadow:var(--k-shadow-1);
  background:linear-gradient(140deg,#0d2b33,#061319);
}
.k-feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.3,1);}
.k-feature:hover .k-feature-media img{transform:scale(1.04);}
.k-feature-media::after{
  content:"";position:absolute;inset:auto 0 0 0;height:58%;
  background:linear-gradient(180deg,transparent,rgba(4,16,26,.72));pointer-events:none;
}
.k-feature-alt .k-feature-media{order:2;}
.k-feature-body h3{font-size:20px;font-weight:600;margin-bottom:12px;}
.k-feature-body p{color:var(--k-ink-300);margin-bottom:16px;}
.k-tag{
  display:inline-block;font-size:13px;font-weight:600;padding:4px 12px;border-radius:999px;
  color:var(--k-brand-400);background:rgba(23,183,154,.1);border:1px solid rgba(23,183,154,.3);
  margin-bottom:12px;
}
.k-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--k-brand-400);}
.k-link:hover{gap:10px;color:var(--k-brand-500);}

/* ---------- cards ---------- */
.k-grid{display:grid;gap:20px;grid-template-columns:repeat(3,1fr);}
.k-card{
  background:var(--k-surface);
  border:1px solid var(--k-line);
  border-radius:var(--k-r-card);
  padding:24px;
  box-shadow:var(--k-shadow-1);
  transition:transform .2s cubic-bezier(.2,.7,.3,1), border-color .2s, box-shadow .2s;
}
.k-card:hover{transform:translateY(-4px);border-color:rgba(23,183,154,.42);box-shadow:var(--k-shadow-2);}
.k-card h3{font-size:17px;font-weight:600;margin-bottom:10px;}
.k-card p{color:var(--k-ink-300);font-size:15px;margin:0;}
.k-card-num{
  font-family:var(--k-mono);font-size:13px;font-weight:600;color:var(--k-brand-400);
  display:inline-block;margin-bottom:12px;padding:3px 10px;border-radius:8px;
  background:rgba(23,183,154,.1);border:1px solid rgba(23,183,154,.28);
}

/* ---------- steps ---------- */
.k-steps{display:grid;gap:20px;grid-template-columns:repeat(2,1fr);}
.k-step{
  display:flex;gap:18px;align-items:flex-start;
  background:var(--k-surface);border:1px solid var(--k-line);
  border-radius:var(--k-r-card);padding:24px;box-shadow:var(--k-shadow-1);
}
.k-step-idx{
  flex:0 0 44px;width:44px;height:44px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--k-mono);font-weight:700;font-size:16px;color:#04191A;
  background:linear-gradient(135deg,var(--k-brand-500),var(--k-brand-600));
  box-shadow:0 8px 20px rgba(23,183,154,.28);
}
.k-step h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.k-step p{margin:0;color:var(--k-ink-300);font-size:15px;}

/* ---------- faq ---------- */
.k-faq{max-width:880px;margin:0 auto;}
.k-faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--k-line);}
.k-faq .accordion-item:first-child{border-top:1px solid var(--k-line);}
.k-faq{
  --bs-accordion-bg:transparent;
  --bs-accordion-border-color:var(--k-line);
  --bs-accordion-btn-color:var(--k-ink-100);
  --bs-accordion-btn-bg:transparent;
  --bs-accordion-active-color:var(--k-brand-400);
  --bs-accordion-active-bg:rgba(23,183,154,.06);
  --bs-accordion-body-bg:transparent;
  --bs-accordion-body-color:var(--k-ink-300);
  --bs-accordion-btn-focus-box-shadow:none;
  --bs-accordion-border-radius:0;
  --bs-accordion-inner-border-radius:0;
}
.k-faq .accordion-button{
  font-size:16px;font-weight:600;padding:20px 6px;box-shadow:none;
  transition:color .2s, background .2s;
}
.k-faq .accordion-button::after{
  background-image:none;content:"";width:10px;height:10px;flex:0 0 10px;
  border-right:2px solid var(--k-brand-400);border-bottom:2px solid var(--k-brand-400);
  transform:rotate(45deg);transition:transform .25s cubic-bezier(.2,.7,.3,1);
  border-radius:1px;margin-left:auto;
}
.k-faq .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);}
.k-faq .accordion-body{padding:0 6px 22px;font-size:15px;line-height:1.8;color:var(--k-ink-300);}

/* ---------- cta ---------- */
.k-cta{
  position:relative;overflow:hidden;border-radius:var(--k-r-glass);
  border:1px solid rgba(23,183,154,.3);
  background:linear-gradient(140deg,rgba(23,183,154,.16),rgba(15,39,51,.9) 62%);
  padding:44px;box-shadow:var(--k-shadow-2);
}
.k-cta::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.16;pointer-events:none;
}
.k-cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center;}
.k-cta h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;margin-bottom:12px;}
.k-cta p{color:var(--k-ink-300);margin-bottom:22px;}
.k-cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.k-form-panel{
  background:var(--k-glass);border:1px solid var(--k-line);border-radius:var(--k-r-glass);
  padding:26px;backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.k-field{margin-bottom:16px;}
.k-field label{display:block;font-size:13px;color:var(--k-ink-300);margin-bottom:7px;}
.k-form-panel .form-control,.k-form-panel .form-select{
  width:100%;background:#0B222C;border:1px solid var(--k-line);color:var(--k-ink-100);
  border-radius:var(--k-r-btn);padding:12px 14px;font-size:15px;
  transition:border-color .18s, box-shadow .18s;
}
.k-form-panel .form-control::placeholder{color:var(--k-ink-500);}
.k-form-panel .form-control:focus,.k-form-panel .form-select:focus{
  background:#0B222C;color:var(--k-ink-100);border-color:var(--k-brand-500);
  box-shadow:0 0 0 4px rgba(23,183,154,.22);outline:none;
}
.k-form-note{font-size:13px;color:var(--k-ink-500);margin:12px 0 0;}

/* ---------- footer ---------- */
.k-footer{background:#04101A;border-top:1px solid var(--k-line);padding:64px 0 0;margin-top:24px;}
.k-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.k-footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.k-footer p{color:var(--k-ink-300);font-size:14px;}
.k-footer h4{font-size:15px;font-weight:600;margin-bottom:14px;}
.k-footer ul li{margin-bottom:10px;}
.k-footer ul li a{font-size:14px;color:var(--k-ink-300);}
.k-footer ul li a:hover{color:var(--k-brand-400);}
.k-footer-qr{
  margin-top:14px;width:104px;height:104px;border-radius:14px;
  border:1px dashed rgba(23,183,154,.4);display:flex;align-items:center;justify-content:center;
  text-align:center;font-size:12px;color:var(--k-ink-500);line-height:1.5;
  background:rgba(15,39,51,.6);
}
.k-footer-bottom{
  margin-top:48px;border-top:1px solid var(--k-line);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--k-ink-500);
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .k-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  .k-menu{
    position:fixed;inset:72px 0 0 0;z-index:1029;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(6,19,25,.97);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    padding:22px 24px;overflow-y:auto;
    display:none;
  }
  body.k-menu-open .k-menu{display:flex;}
  .k-menu a{font-size:17px;padding:14px 12px;}
  .k-menu a.k-active::after{left:12px;right:auto;width:28px;}
  .k-burger{display:block;}
  .k-pagehead{padding:32px 0 28px;}
  .k-pagehead-panel{padding:26px 22px;}
  .k-feature{grid-template-columns:1fr;gap:22px;padding:30px 0;}
  .k-feature-alt .k-feature-media{order:0;}
  .k-cta{padding:32px 24px;}
  .k-cta-inner{grid-template-columns:1fr;gap:28px;}
  .k-footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .k-section{padding:64px 0;}
  .k-steps{grid-template-columns:1fr;}
}
@media (max-width:767.98px){
  .k-container{padding:0 16px;}
  .k-logo-text span{display:none;}
  .k-chip{display:none;}
  .k-nav{height:64px;gap:12px;}
  .k-header.k-scrolled .k-nav{height:58px;}
  .k-menu{inset:64px 0 0 0;}
  .k-grid{grid-template-columns:1fr;}
  .k-section{padding:52px 0;}
  .k-sec-head{margin-bottom:26px;}
  .k-pagehead h1{font-size:clamp(24px,6.4vw,30px);}
  .k-cta-actions .k-btn{width:100%;}
  .k-footer-grid{grid-template-columns:1fr;}
  .k-footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .k-card:hover,.k-btn:hover,.k-feature:hover .k-feature-media img{transform:none;}
}

/* roulang page: category3 */
:root{
  --k-bg-900:#061319;
  --k-bg-800:#0A1E27;
  --k-surface:#0F2733;
  --k-glass:rgba(18,52,63,.55);
  --k-line:rgba(120,220,200,.14);
  --k-line-strong:rgba(120,220,200,.28);
  --k-brand-500:#17B79A;
  --k-brand-400:#3FD9B8;
  --k-brand-600:#0E8E7A;
  --k-accent:#F2B544;
  --k-ink-100:#EAF6F4;
  --k-ink-300:#A9C4C4;
  --k-ink-500:#6E8A8C;
  --k-radius-card:18px;
  --k-radius-panel:24px;
  --k-radius-btn:12px;
  --k-shadow-1:0 10px 28px rgba(0,0,0,.42);
  --k-shadow-2:0 18px 44px rgba(0,0,0,.55);
  --k-glow:0 0 0 1px rgba(23,183,154,.35),0 10px 30px rgba(23,183,154,.26);
  --k-ease:cubic-bezier(.2,.7,.3,1);

  --bs-primary:#17B79A;
  --bs-body-bg:#061319;
  --bs-body-color:#EAF6F4;
  --bs-border-color:rgba(120,220,200,.14);
  --bs-border-radius:18px;
  --bs-font-sans-serif:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-link-color:#3FD9B8;
  --bs-link-hover-color:#17B79A;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--k-bg-900);color:var(--k-ink-100);
  font-family:var(--bs-font-sans-serif);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--k-brand-400);text-decoration:none;transition:color .18s var(--k-ease)}
a:hover{color:var(--k-brand-500)}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--k-brand-400);outline-offset:2px}
::selection{background:rgba(23,183,154,.35)}

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

/* ============ 顶部导航 ============ */
.k-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(6,19,25,.74);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--k-line);
  transition:background .25s var(--k-ease),box-shadow .25s var(--k-ease);
}
.k-header.k-scrolled{background:rgba(6,19,25,.94);box-shadow:0 10px 28px rgba(0,0,0,.42)}
.k-nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;transition:height .25s var(--k-ease)}
.k-header.k-scrolled .k-nav{height:60px}
.k-logo{display:flex;align-items:center;gap:10px;color:var(--k-ink-100);flex:0 0 auto}
.k-logo:hover{color:var(--k-ink-100)}
.k-logo-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,#17B79A,#0E8E7A);
  box-shadow:0 0 0 1px rgba(23,183,154,.35),0 8px 20px rgba(23,183,154,.24);
}
.k-logo-mark svg{width:22px;height:22px;fill:#04120F}
.k-logo-text{display:flex;flex-direction:column;line-height:1.15}
.k-logo-text b{font-size:16px;font-weight:800;letter-spacing:-.2px}
.k-logo-text span{font-size:11px;letter-spacing:2px;color:var(--k-ink-500)}
.k-menu{display:flex;align-items:center;gap:4px}
.k-menu a{
  position:relative;padding:8px 13px;border-radius:10px;font-size:15px;color:var(--k-ink-300);
  transition:color .18s var(--k-ease),background .18s var(--k-ease);
}
.k-menu a:hover{color:var(--k-ink-100);background:rgba(63,217,184,.09)}
.k-menu a.k-active{color:var(--k-brand-400)}
.k-menu a.k-active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:18px;height:2px;border-radius:2px;background:var(--k-brand-500);
}
.k-nav-right{display:flex;align-items:center;gap:12px}
.k-chip{
  font-size:12.5px;padding:4px 11px;border-radius:999px;
  color:var(--k-accent);border:1px solid rgba(242,181,68,.45);
  background:rgba(242,181,68,.06);white-space:nowrap;
}
.k-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;padding:12px 22px;border-radius:var(--k-radius-btn);
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:transform .18s var(--k-ease),box-shadow .18s var(--k-ease),background .18s var(--k-ease),color .18s var(--k-ease),border-color .18s var(--k-ease);
}
.k-btn:active{transform:translateY(1px)}
.k-btn-primary{
  background:linear-gradient(135deg,#17B79A,#0E8E7A);color:#03130F;
  box-shadow:0 0 0 1px rgba(23,183,154,.35),0 10px 26px rgba(23,183,154,.26);
}
.k-btn-primary:hover{transform:translateY(-2px);color:#03130F;box-shadow:0 0 0 1px rgba(23,183,154,.5),0 16px 38px rgba(23,183,154,.4)}
.k-btn-ghost{
  background:rgba(18,52,63,.55);color:var(--k-brand-400);
  border-color:var(--k-line-strong);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.k-btn-ghost:hover{transform:translateY(-2px);color:var(--k-brand-400);border-color:var(--k-brand-500);box-shadow:var(--k-glow)}
.k-btn-weak{background:transparent;color:var(--k-ink-300);padding:10px 16px}
.k-btn-weak:hover{color:var(--k-brand-400)}
.k-btn-sm{padding:9px 16px;font-size:14px}
.k-btn-block{width:100%}
.k-burger{
  display:none;width:42px;height:42px;border-radius:12px;background:rgba(18,52,63,.6);
  border:1px solid var(--k-line);position:relative;
}
.k-burger span,.k-burger span::before,.k-burger span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--k-ink-100);
  transform:translateX(-50%);transition:transform .22s var(--k-ease),opacity .22s var(--k-ease);
}
.k-burger span{top:50%;margin-top:-1px}
.k-burger span::before{top:-6px}
.k-burger span::after{top:6px}
body.k-menu-open .k-burger span{background:transparent}
body.k-menu-open .k-burger span::before{transform:translateX(-50%) translateY(6px) rotate(45deg)}
body.k-menu-open .k-burger span::after{transform:translateX(-50%) translateY(-6px) rotate(-45deg)}
.k-drawer{
  position:fixed;inset:72px 0 0 0;z-index:1029;padding:26px 24px 40px;
  background:rgba(6,19,25,.96);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  display:none;flex-direction:column;gap:6px;
}
body.k-menu-open .k-drawer{display:flex}
.k-drawer a{
  font-size:17px;color:var(--k-ink-100);padding:14px 6px;border-bottom:1px solid var(--k-line);
}
.k-drawer a.k-active{color:var(--k-brand-400)}
.k-drawer .k-btn{margin-top:20px;font-size:16px}

/* ============ 页头 Banner ============ */
.k-banner{position:relative;padding:60px 0 46px;overflow:hidden}
.k-banner::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.30;
}
.k-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,19,25,.62) 0%,rgba(6,19,25,.88) 62%,var(--k-bg-900) 100%);
}
.k-banner-inner{position:relative;z-index:2}
.k-crumb{font-size:13.5px;color:var(--k-ink-500);display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.k-crumb a{color:var(--k-ink-300)}
.k-crumb a:hover{color:var(--k-brand-400)}
.k-banner-panel{
  max-width:860px;border-radius:var(--k-radius-panel);padding:34px 34px 30px;
  background:var(--k-glass);border:1px solid var(--k-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--k-shadow-1);
}
.k-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--k-brand-400);border:1px solid var(--k-line-strong);border-radius:999px;
  padding:5px 13px;margin-bottom:16px;background:rgba(23,183,154,.08);
}
.k-eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--k-brand-500);box-shadow:0 0 0 4px rgba(23,183,154,.18);display:block}
.k-banner h1{
  font-size:clamp(30px,5vw,52px);font-weight:800;letter-spacing:-.5px;line-height:1.24;margin-bottom:14px;
}
.k-banner h1 em{font-style:normal;color:var(--k-brand-400)}
.k-banner-panel p{color:var(--k-ink-300);font-size:16px;max-width:660px}
.k-banner-stats{display:flex;flex-wrap:wrap;gap:30px;margin-top:26px}
.k-stat b{font-size:27px;font-weight:800;color:var(--k-ink-100);letter-spacing:-.5px}
.k-stat b i{font-style:normal;font-size:13px;font-weight:600;color:var(--k-ink-500);margin-left:4px}
.k-stat span{display:block;font-size:13px;color:var(--k-ink-500)}

/* ============ 分类锚点 ============ */
.k-anchors{display:flex;flex-wrap:wrap;gap:10px;padding:28px 0 0}
.k-anchor{
  font-size:14px;font-weight:600;padding:9px 18px;border-radius:999px;
  border:1px solid var(--k-line);color:var(--k-ink-300);background:var(--k-bg-800);
  transition:color .18s var(--k-ease),border-color .18s var(--k-ease),transform .18s var(--k-ease);
}
.k-anchor:hover{color:var(--k-brand-400);border-color:var(--k-brand-500);transform:translateY(-1px)}
.k-anchor.is-current{
  color:#03130F;background:linear-gradient(135deg,#17B79A,#0E8E7A);border-color:transparent;
  box-shadow:0 0 0 1px rgba(23,183,154,.35),0 8px 22px rgba(23,183,154,.24);
}

/* ============ 通用板块 ============ */
.k-section{padding:104px 0}
.k-section.k-tight{padding:76px 0}
.k-section-head{max-width:760px;margin-bottom:44px}
.k-section-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.4px;line-height:1.3;margin-bottom:12px}
.k-section-head p{color:var(--k-ink-300)}
.k-rule{height:1px;background:linear-gradient(90deg,var(--k-line-strong),transparent);margin:0}

/* ============ 时间线 ============ */
.k-timeline{position:relative}
.k-step{display:grid;grid-template-columns:64px 1fr;gap:26px;padding-bottom:36px;position:relative}
.k-step:last-child{padding-bottom:0}
.k-step:not(:last-child)::before{
  content:"";position:absolute;left:31px;top:66px;bottom:4px;width:2px;
  background:linear-gradient(180deg,rgba(23,183,154,.55),rgba(23,183,154,.06));
}
.k-step-num{
  width:64px;height:64px;border-radius:50%;display:grid;place-items:center;
  font-size:19px;font-weight:800;color:var(--k-brand-400);
  background:var(--k-surface);border:1px solid var(--k-line-strong);
  box-shadow:0 0 0 5px rgba(23,183,154,.06),var(--k-shadow-1);
  position:relative;z-index:2;
}
.k-step-body{
  background:var(--k-surface);border:1px solid var(--k-line);border-radius:var(--k-radius-card);
  padding:22px 24px;box-shadow:var(--k-shadow-1);
  transition:transform .2s var(--k-ease),border-color .2s var(--k-ease),box-shadow .2s var(--k-ease);
}
.k-step-body:hover{transform:translateY(-4px);border-color:rgba(23,183,154,.42);box-shadow:var(--k-shadow-2)}
.k-step-body h3{font-size:20px;font-weight:600;margin-bottom:10px}
.k-step-body p{color:var(--k-ink-300);font-size:15.5px}
.k-step-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.k-tag{
  font-size:13px;padding:4px 11px;border-radius:999px;color:var(--k-ink-300);
  border:1px solid var(--k-line);background:rgba(10,30,39,.9);
}
.k-tag.is-brand{color:var(--k-brand-400);border-color:var(--k-line-strong);background:rgba(23,183,154,.08)}
.k-tag.is-warn{color:var(--k-accent);border-color:rgba(242,181,68,.35);background:rgba(242,181,68,.07)}

/* ============ 现象对照卡 ============ */
.k-grid-k{display:grid;gap:20px;grid-template-columns:repeat(2,minmax(0,1fr))}
.k-card{
  background:var(--k-surface);border:1px solid var(--k-line);border-radius:var(--k-radius-card);
  padding:24px;box-shadow:var(--k-shadow-1);
  transition:transform .2s var(--k-ease),border-color .2s var(--k-ease),box-shadow .2s var(--k-ease);
}
.k-card:hover{transform:translateY(-4px);border-color:rgba(23,183,154,.42);box-shadow:var(--k-shadow-2)}
.k-card h3{font-size:17px;font-weight:600;margin-bottom:8px;display:flex;align-items:center;gap:10px}
.k-card p{color:var(--k-ink-300);font-size:15px}
.k-card .k-tag{margin-top:14px;display:inline-block}
.k-dot{width:9px;height:9px;border-radius:50%;background:var(--k-brand-500);box-shadow:0 0 0 4px rgba(23,183,154,.14);flex:0 0 auto}
.k-dot.is-accent{background:var(--k-accent);box-shadow:0 0 0 4px rgba(242,181,68,.14)}

/* ============ 图文块 ============ */
.k-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:44px;align-items:center}
.k-figure{position:relative;border-radius:var(--k-radius-card);overflow:hidden;border:1px solid var(--k-line);box-shadow:var(--k-shadow-1)}
.k-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.k-figure::after{
  content:"";position:absolute;inset:auto 0 0 0;height:58%;
  background:linear-gradient(180deg,rgba(6,19,25,0),rgba(6,19,25,.86));
}
.k-figure-cap{
  position:absolute;left:20px;right:20px;bottom:16px;z-index:2;font-size:13px;color:var(--k-ink-300);
}
.k-checklist li{
  display:flex;gap:14px;padding:15px 0;border-bottom:1px solid var(--k-line);
}
.k-checklist li:last-child{border-bottom:0}
.k-checklist .k-check{
  width:24px;height:24px;border-radius:8px;flex:0 0 auto;display:grid;place-items:center;
  background:rgba(23,183,154,.14);color:var(--k-brand-400);font-size:13px;font-weight:700;margin-top:3px;
}
.k-checklist b{display:block;font-size:16px;font-weight:600;margin-bottom:3px}
.k-checklist span{color:var(--k-ink-300);font-size:14.5px}

/* ============ FAQ ============ */
.k-faq{max-width:880px;margin:0 auto;border-top:1px solid var(--k-line)}
.k-faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--k-line);border-radius:0}
.k-faq .accordion-button{
  background:transparent;color:var(--k-ink-100);font-size:16px;font-weight:600;
  padding:22px 46px 22px 18px;box-shadow:none;border-radius:0;line-height:1.6;
}
.k-faq .accordion-button::after{
  content:"+";background-image:none;font-size:22px;font-weight:400;color:var(--k-brand-400);
  width:auto;height:auto;transform:none;line-height:1;margin-left:auto;position:absolute;right:12px;
  transition:transform .22s var(--k-ease),color .22s var(--k-ease);
}
.k-faq .accordion-button:not(.collapsed){
  background:rgba(23,183,154,.07);color:var(--k-brand-400);box-shadow:none;
}
.k-faq .accordion-button:not(.collapsed)::after{transform:rotate(45deg);color:var(--k-brand-400)}
.k-faq .accordion-button:focus{box-shadow:none;outline:none}
.k-faq .accordion-button:focus-visible{outline:2px solid var(--k-brand-400);outline-offset:-2px}
.k-faq .accordion-body{color:var(--k-ink-300);font-size:15px;line-height:1.85;padding:0 46px 24px 18px}

/* ============ CTA ============ */
.k-cta{
  position:relative;border-radius:var(--k-radius-panel);overflow:hidden;
  background:linear-gradient(135deg,rgba(23,183,154,.16),rgba(10,30,39,.92) 58%);
  border:1px solid var(--k-line-strong);padding:48px;
  box-shadow:var(--k-shadow-2);
}
.k-cta-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:42px;align-items:start}
.k-cta h2{font-size:clamp(24px,3vw,32px);font-weight:700;letter-spacing:-.4px;margin-bottom:14px}
.k-cta p{color:var(--k-ink-300);max-width:520px}
.k-cta-points{margin-top:22px;display:grid;gap:10px}
.k-cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--k-ink-300)}
.k-cta-points li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--k-brand-500);margin-top:9px;flex:0 0 auto}
.k-form{
  border-radius:var(--k-radius-panel);padding:26px;background:var(--k-glass);
  border:1px solid var(--k-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--k-shadow-1);
}
.k-field{margin-bottom:16px}
.k-field label{display:block;font-size:13px;color:var(--k-ink-300);margin-bottom:7px}
.k-input{
  width:100%;padding:12px 14px;border-radius:var(--k-radius-btn);
  background:#0B222C;border:1px solid var(--k-line);color:var(--k-ink-100);
  transition:border-color .18s var(--k-ease),box-shadow .18s var(--k-ease);
}
.k-input::placeholder{color:var(--k-ink-500)}
.k-input:focus{outline:none;border-color:var(--k-brand-500);box-shadow:0 0 0 4px rgba(23,183,154,.18)}
.k-form-note{font-size:12.5px;color:var(--k-ink-500);margin-top:12px}

/* ============ 页脚 ============ */
.k-footer{background:#04101A;border-top:1px solid var(--k-line);padding:66px 0 0}
.k-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:38px}
.k-footer h4{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--k-ink-100)}
.k-footer p{color:var(--k-ink-300);font-size:14px;max-width:340px}
.k-footer ul li{margin-bottom:10px}
.k-footer ul a{color:var(--k-ink-300);font-size:14px}
.k-footer ul a:hover{color:var(--k-brand-400)}
.k-footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.k-footer-qr{
  margin-top:16px;width:112px;height:112px;border-radius:14px;border:1px dashed var(--k-line-strong);
  display:grid;place-items:center;text-align:center;font-size:12.5px;color:var(--k-ink-500);
  background:rgba(10,30,39,.7);line-height:1.6;padding:8px;
}
.k-footer-bottom{
  margin-top:52px;padding:20px 0;border-top:1px solid var(--k-line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--k-ink-500);
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .k-container{padding:0 20px}
}
@media (max-width:991.98px){
  .k-menu,.k-chip{display:none}
  .k-burger{display:block}
  .k-nav-right .k-btn{display:none}
  .k-section{padding:76px 0}
  .k-split{grid-template-columns:1fr;gap:30px}
  .k-cta-grid{grid-template-columns:1fr;gap:32px}
  .k-cta{padding:36px}
  .k-footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767.98px){
  .k-container{padding:0 16px}
  .k-banner{padding:42px 0 32px}
  .k-banner-panel{padding:24px 20px 22px}
  .k-banner-stats{gap:22px}
  .k-stat b{font-size:23px}
  .k-section{padding:56px 0}
  .k-section.k-tight{padding:48px 0}
  .k-section-head{margin-bottom:30px}
  .k-grid-k{grid-template-columns:1fr}
  .k-step{grid-template-columns:44px 1fr;gap:16px}
  .k-step-num{width:44px;height:44px;font-size:16px}
  .k-step:not(:last-child)::before{left:21px;top:48px}
  .k-step-body{padding:18px 16px}
  .k-cta{padding:26px 18px}
  .k-form{padding:20px 16px}
  .k-faq .accordion-button{padding:18px 40px 18px 12px;font-size:15.5px}
  .k-faq .accordion-body{padding:0 16px 20px 12px}
  .k-footer{padding-top:48px}
  .k-footer-grid{grid-template-columns:1fr;gap:26px}
  .k-footer-bottom{flex-direction:column;gap:6px}
  .k-btn-block-mobile{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .k-btn:hover,.k-card:hover,.k-step-body:hover,.k-anchor:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --k-bg-900:#061319;
  --k-bg-800:#0A1E27;
  --k-surface:#0F2733;
  --k-surface-2:#0B222C;
  --k-glass:rgba(18,52,63,.55);
  --k-line:rgba(120,220,200,.14);
  --k-line-strong:rgba(120,220,200,.30);
  --k-brand-500:#17B79A;
  --k-brand-400:#3FD9B8;
  --k-brand-600:#0E8E7A;
  --k-accent:#F2B544;
  --k-ink-100:#EAF6F4;
  --k-ink-300:#A9C4C4;
  --k-ink-500:#6E8A8C;
  --k-r-card:18px;
  --k-r-glass:24px;
  --k-r-btn:12px;
  --k-shadow-1:0 10px 28px rgba(0,0,0,.42);
  --k-shadow-2:0 18px 44px rgba(0,0,0,.55);
  --k-glow:0 0 0 1px rgba(23,183,154,.35),0 10px 30px rgba(23,183,154,.26);
  --k-ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#17B79A;
  --bs-body-bg:#061319;
  --bs-body-color:#EAF6F4;
  --bs-border-color:rgba(120,220,200,.14);
  --bs-border-radius:14px;
  --bs-font-sans-serif:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-link-color:#3FD9B8;
  --bs-link-hover-color:#17B79A;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16px;line-height:1.8;color:var(--k-ink-100);
  background:radial-gradient(1100px 560px at 82% -12%,rgba(23,183,154,.10),transparent 62%),var(--k-bg-900);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--k-brand-400);outline-offset:2px}
.k-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部活动条 ---------- */
.k-topbar{background:linear-gradient(90deg,#08222C,#061319 70%);border-bottom:1px solid var(--k-line);font-size:13px;color:var(--k-ink-300)}
.k-topbar .k-container{display:flex;align-items:center;justify-content:space-between;gap:16px;height:38px;min-height:38px}
.k-topbar-left{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.k-dot{width:8px;height:8px;border-radius:50%;background:var(--k-brand-500);box-shadow:0 0 0 4px rgba(23,183,154,.16);animation:kPulse 2.4s var(--k-ease) infinite}
@keyframes kPulse{0%,100%{box-shadow:0 0 0 4px rgba(23,183,154,.16)}50%{box-shadow:0 0 0 8px rgba(23,183,154,.05)}}
.k-topbar-right{display:inline-flex;align-items:center;gap:10px;color:var(--k-ink-500)}
.k-topbar-close{background:transparent;border:1px solid var(--k-line);color:var(--k-ink-300);width:22px;height:22px;line-height:1;border-radius:50%;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:14px;transition:all .18s var(--k-ease)}
.k-topbar-close:hover{border-color:var(--k-brand-500);color:var(--k-brand-400)}

/* ---------- 导航 ---------- */
.k-header{
  position:sticky;top:0;z-index:50;
  background:rgba(6,19,25,.74);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--k-line);
  transition:background .2s var(--k-ease),box-shadow .2s var(--k-ease);
}
.k-header.is-scrolled{background:rgba(4,16,26,.94);box-shadow:0 10px 30px rgba(0,0,0,.45)}
.k-nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;transition:height .2s var(--k-ease)}
.k-header.is-scrolled .k-nav{height:60px}
.k-logo{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.k-logo-mark{width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(140deg,rgba(23,183,154,.26),rgba(14,142,122,.10));border:1px solid rgba(23,183,154,.38);box-shadow:inset 0 0 18px rgba(23,183,154,.16)}
.k-logo-mark svg{width:22px;height:22px;fill:var(--k-brand-400)}
.k-logo-text{display:flex;flex-direction:column;line-height:1.15}
.k-logo-text b{font-size:17px;font-weight:800;letter-spacing:.2px;color:var(--k-ink-100)}
.k-logo-text span{font-size:10px;letter-spacing:.24em;color:var(--k-ink-500);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.k-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.k-menu a{position:relative;padding:9px 14px;border-radius:10px;font-size:15px;color:var(--k-ink-300);transition:color .18s var(--k-ease),background .18s var(--k-ease)}
.k-menu a:hover{color:var(--k-ink-100);background:rgba(23,183,154,.08)}
.k-menu a.k-active{color:var(--k-brand-400)}
.k-menu a.k-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--k-brand-500);box-shadow:0 0 10px rgba(23,183,154,.7)}
.k-nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.k-chip{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;border:1px solid rgba(242,181,68,.5);color:var(--k-accent);font-size:12px;letter-spacing:.04em;white-space:nowrap}
.k-burger{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--k-line-strong);background:rgba(18,52,63,.5);position:relative;cursor:pointer}
.k-burger span,.k-burger span::before,.k-burger span::after{position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--k-ink-100);transform:translateX(-50%);transition:all .22s var(--k-ease)}
.k-burger span{top:50%;margin-top:-1px}
.k-burger span::before,.k-burger span::after{content:"";left:0;transform:none}
.k-burger span::before{top:-6px}
.k-burger span::after{top:6px}
.k-burger[aria-expanded="true"] span{background:transparent}
.k-burger[aria-expanded="true"] span::before{top:0;transform:rotate(45deg);background:var(--k-brand-400)}
.k-burger[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg);background:var(--k-brand-400)}

/* ---------- 移动抽屉 ---------- */
.k-drawer{position:fixed;left:0;right:0;top:0;bottom:0;z-index:45;background:rgba(6,19,25,.97);backdrop-filter:blur(16px);padding:104px 24px 32px;transform:translateY(-100%);opacity:0;visibility:hidden;transition:transform .28s var(--k-ease),opacity .28s var(--k-ease),visibility .28s;overflow-y:auto;display:none}
.k-drawer.is-open{transform:none;opacity:1;visibility:visible}
.k-drawer-nav{display:flex;flex-direction:column}
.k-drawer-nav a{padding:16px 4px;font-size:17px;color:var(--k-ink-100);border-bottom:1px solid var(--k-line)}
.k-drawer-nav a.k-active{color:var(--k-brand-400)}
.k-drawer-cta{margin-top:24px;border-bottom:0!important}

/* ---------- 按钮 ---------- */
.k-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;padding:12px 22px;border-radius:var(--k-r-btn);border:1px solid transparent;cursor:pointer;line-height:1.2;text-align:center;transition:transform .18s var(--k-ease),box-shadow .18s var(--k-ease),background .18s var(--k-ease),border-color .18s var(--k-ease),color .18s var(--k-ease)}
.k-btn-primary{background:linear-gradient(135deg,#17B79A,#0E8E7A);color:#F4FFFD;box-shadow:var(--k-glow)}
.k-btn-primary:hover{transform:translateY(-2px);color:#FFFFFF;box-shadow:0 0 0 1px rgba(23,183,154,.5),0 16px 38px rgba(23,183,154,.34)}
.k-btn-primary:active{transform:translateY(1px)}
.k-btn-ghost{background:rgba(18,52,63,.5);border-color:var(--k-line-strong);color:var(--k-brand-400);backdrop-filter:blur(10px)}
.k-btn-ghost:hover{transform:translateY(-2px);border-color:rgba(23,183,154,.6);color:var(--k-brand-400);background:rgba(23,183,154,.12)}
.k-btn-ghost:active{transform:translateY(1px)}
.k-btn-weak{background:transparent;border-color:transparent;color:var(--k-ink-300);padding-left:6px;padding-right:6px}
.k-btn-weak:hover{color:var(--k-brand-400)}
.k-btn-sm{padding:9px 16px;font-size:14px}

/* ---------- 分类页头 ---------- */
.k-pagehead{
  position:relative;padding:48px 0 44px;
  background-image:linear-gradient(180deg,rgba(6,19,25,.86),rgba(6,19,25,.94)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--k-line);
}
.k-crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--k-ink-500);margin-bottom:18px;flex-wrap:wrap}
.k-crumb a{color:var(--k-ink-300)}
.k-crumb a:hover{color:var(--k-brand-400)}
.k-crumb span.sep{color:var(--k-ink-500)}
.k-crumb strong{color:var(--k-ink-100);font-weight:600}
.k-pagehead-panel{background:var(--k-glass);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);border:1px solid var(--k-line);border-radius:var(--k-r-glass);padding:30px 32px;box-shadow:var(--k-shadow-1)}
.k-eyebrow{display:inline-flex;align-items:center;gap:8px;padding:5px 13px;border-radius:999px;background:rgba(23,183,154,.12);border:1px solid rgba(23,183,154,.36);color:var(--k-brand-400);font-size:12px;letter-spacing:.06em;margin-bottom:16px}
.k-pagehead h1{font-size:clamp(28px,4.2vw,44px);font-weight:800;letter-spacing:-.5px;max-width:22em}
.k-pagehead .k-lead{margin-top:14px;color:var(--k-ink-300);font-size:16px;max-width:62ch}

/* ---------- 分类锚点 ---------- */
.k-anchors{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.k-anchor{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:999px;border:1px solid var(--k-line);background:rgba(11,34,44,.6);color:var(--k-ink-300);font-size:14px;transition:all .18s var(--k-ease)}
.k-anchor:hover{color:var(--k-ink-100);border-color:var(--k-line-strong);transform:translateY(-1px)}
.k-anchor.is-current{color:var(--k-brand-400);border-color:rgba(23,183,154,.55);background:rgba(23,183,154,.14);box-shadow:0 0 0 1px rgba(23,183,154,.22)}

/* ---------- 区块 ---------- */
.k-section{padding:104px 0}
.k-section-alt{background:var(--k-bg-800);border-top:1px solid var(--k-line);border-bottom:1px solid var(--k-line)}
.k-sec-head{max-width:720px;margin-bottom:40px}
.k-sec-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.3px}
.k-sec-head p{margin-top:12px;color:var(--k-ink-300)}
.k-sec-tag{display:inline-block;font-size:12px;letter-spacing:.16em;color:var(--k-brand-400);margin-bottom:12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}

/* ---------- 左窄右宽 ---------- */
.k-split{display:grid;grid-template-columns:340px minmax(0,1fr);gap:28px;align-items:start}
.k-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.k-glass{background:var(--k-glass);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);border:1px solid var(--k-line);border-radius:var(--k-r-glass);padding:24px;box-shadow:var(--k-shadow-1)}
.k-glass h3{font-size:17px;font-weight:600;margin-bottom:6px}
.k-glass .k-note{font-size:13px;color:var(--k-ink-500)}
.k-stats{display:flex;flex-direction:column;gap:14px;margin:18px 0 20px;padding:18px 0;border-top:1px solid var(--k-line);border-bottom:1px solid var(--k-line)}
.k-stat{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.k-stat b{font-size:26px;font-weight:800;color:var(--k-brand-400);font-variant-numeric:tabular-nums}
.k-stat b em{font-style:normal;font-size:13px;color:var(--k-ink-300);margin-left:3px;font-weight:600}
.k-stat span{font-size:13px;color:var(--k-ink-300)}
.k-points{display:flex;flex-direction:column;gap:12px}
.k-points li{position:relative;padding-left:24px;font-size:14px;color:var(--k-ink-300);line-height:1.7}
.k-points li::before{content:"";position:absolute;left:2px;top:9px;width:8px;height:8px;border-radius:3px;background:linear-gradient(135deg,#17B79A,#0E8E7A);box-shadow:0 0 10px rgba(23,183,154,.6)}
.k-side-cta{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.k-side-cta .k-btn{width:100%}

/* ---------- 条目列表 ---------- */
.k-list{display:flex;flex-direction:column;gap:20px}
.k-item{display:grid;grid-template-columns:236px minmax(0,1fr);gap:0;background:var(--k-surface);border:1px solid var(--k-line);border-radius:var(--k-r-card);overflow:hidden;transition:transform .2s var(--k-ease),border-color .2s var(--k-ease),box-shadow .2s var(--k-ease)}
.k-item:hover{transform:translateY(-4px);border-color:rgba(23,183,154,.55);box-shadow:var(--k-shadow-2)}
.k-item-media{position:relative;overflow:hidden;background:linear-gradient(140deg,#0E3843,#08202A)}
.k-item-media img{width:100%;height:100%;min-height:170px;object-fit:cover;transition:transform .25s var(--k-ease)}
.k-item:hover .k-item-media img{transform:scale(1.04)}
.k-item-body{padding:22px 24px;display:flex;flex-direction:column;gap:10px}
.k-item-body h3{font-size:19px;font-weight:600}
.k-item-body p{font-size:15px;color:var(--k-ink-300);line-height:1.8}
.k-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:6px;font-size:13px;color:var(--k-ink-500)}
.k-tag{display:inline-flex;align-items:center;gap:6px;padding:3px 11px;border-radius:999px;background:rgba(23,183,154,.13);border:1px solid rgba(23,183,154,.32);color:var(--k-brand-400);font-size:12px}
.k-link{display:inline-flex;align-items:center;gap:6px;color:var(--k-brand-400);font-size:14px;font-weight:600;transition:gap .18s var(--k-ease),color .18s var(--k-ease)}
.k-link:hover{gap:10px;color:var(--k-brand-500)}

/* ---------- 风险信号卡 ---------- */
.k-grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.k-alert{background:var(--k-surface);border:1px solid var(--k-line);border-radius:var(--k-r-card);padding:22px;display:flex;flex-direction:column;gap:12px;transition:transform .2s var(--k-ease),border-color .2s var(--k-ease)}
.k-alert:hover{transform:translateY(-4px);border-color:rgba(242,181,68,.5)}
.k-alert-icon{width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;background:rgba(242,181,68,.12);border:1px solid rgba(242,181,68,.35)}
.k-alert-icon svg{width:20px;height:20px;fill:none;stroke:var(--k-accent);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.k-alert h4{font-size:16px;font-weight:600}
.k-alert p{font-size:14px;color:var(--k-ink-300)}
.k-alert .k-advice{font-size:13px;color:var(--k-ink-500);border-top:1px dashed var(--k-line);padding-top:10px}
.k-alert .k-advice b{color:var(--k-brand-400);font-weight:600}

/* ---------- FAQ ---------- */
.k-faq{max-width:880px;margin:0 auto}
.k-faq .accordion-item{background:transparent;border:0;border-top:1px solid var(--k-line)}
.k-faq .accordion-item:last-child{border-bottom:1px solid var(--k-line)}
.k-faq .accordion-header{margin:0}
.k-faq .accordion-button{background:transparent;border:0;box-shadow:none;color:var(--k-ink-100);font-size:16px;font-weight:600;padding:22px 44px 22px 0;line-height:1.6;border-radius:0}
.k-faq .accordion-button:not(.collapsed){color:var(--k-brand-400);background:rgba(23,183,154,.06)}
.k-faq .accordion-button:hover{color:var(--k-brand-400)}
.k-faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--k-brand-400);outline-offset:-2px}
.k-faq .accordion-button::after{width:10px;height:10px;background-image:none;border-right:2px solid var(--k-brand-400);border-bottom:2px solid var(--k-brand-400);transform:rotate(45deg);transition:transform .22s var(--k-ease);margin-right:8px}
.k-faq .accordion-button:not(.collapsed)::after{transform:rotate(-135deg)}
.k-faq .accordion-body{padding:0 44px 24px 0;color:var(--k-ink-300);font-size:15px;line-height:1.85}

/* ---------- CTA ---------- */
.k-cta{background:linear-gradient(160deg,#0A1E27,#061319 70%);border-top:1px solid var(--k-line);padding:104px 0}
.k-cta-panel{background:var(--k-glass);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);border:1px solid var(--k-line);border-radius:var(--k-r-glass);padding:40px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;box-shadow:var(--k-shadow-1)}
.k-cta-panel h2{font-size:clamp(24px,3vw,32px);letter-spacing:-.3px}
.k-cta-panel .k-cta-text{margin-top:14px;color:var(--k-ink-300);font-size:15px}
.k-cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.k-form{display:flex;flex-direction:column;gap:16px}
.k-field{display:flex;flex-direction:column;gap:7px}
.k-field label{font-size:13px;color:var(--k-ink-300)}
.k-input,.k-select{width:100%;background:#0B222C;border:1px solid var(--k-line);border-radius:12px;color:var(--k-ink-100);font-size:15px;padding:12px 14px;transition:border-color .18s var(--k-ease),box-shadow .18s var(--k-ease)}
.k-input::placeholder{color:var(--k-ink-500)}
.k-input:focus,.k-select:focus{outline:none;border-color:var(--k-brand-500);box-shadow:0 0 0 4px rgba(23,183,154,.18)}
.k-select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--k-brand-400) 50%),linear-gradient(135deg,var(--k-brand-400) 50%,transparent 50%);background-position:calc(100% - 20px) 50%,calc(100% - 14px) 50%;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.k-form-msg{font-size:13px;color:var(--k-accent);min-height:20px}

/* ---------- 页脚 ---------- */
.k-footer{background:#04101A;border-top:1px solid var(--k-line);padding:72px 0 0}
.k-footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px}
.k-footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.k-footer p{font-size:14px;color:var(--k-ink-300);line-height:1.8}
.k-footer h4{font-size:15px;font-weight:600;margin-bottom:16px}
.k-footer ul{display:flex;flex-direction:column;gap:11px}
.k-footer ul a,.k-footer ul span{font-size:14px;color:var(--k-ink-300);transition:color .18s var(--k-ease)}
.k-footer ul a:hover{color:var(--k-brand-400)}
.k-footer-qr{margin-top:18px;width:112px;height:112px;border-radius:14px;border:1px dashed var(--k-line-strong);background:rgba(15,39,51,.7);display:flex;align-items:center;justify-content:center;text-align:center;font-size:12px;color:var(--k-ink-500);line-height:1.6}
.k-footer-bottom{margin-top:56px;border-top:1px solid var(--k-line);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:var(--k-ink-500);flex-wrap:wrap}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .k-container{padding:0 22px}
  .k-split{grid-template-columns:300px minmax(0,1fr)}
}
@media (max-width:992px){
  .k-menu{display:none}
  .k-drawer{display:block}
  .k-burger{display:block}
  .k-chip{display:none}
  .k-section{padding:76px 0}
  .k-cta{padding:76px 0}
  .k-split{grid-template-columns:1fr;gap:24px}
  .k-side{position:static}
  .k-cta-panel{grid-template-columns:1fr;gap:28px;padding:32px}
  .k-grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .k-footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .k-item{grid-template-columns:200px minmax(0,1fr)}
}
@media (max-width:768px){
  .k-container{padding:0 16px}
  .k-topbar .k-container{height:auto;min-height:38px;padding-top:8px;padding-bottom:8px;flex-wrap:wrap}
  .k-topbar-right{font-size:12px}
  .k-nav{height:64px}
  .k-header.is-scrolled .k-nav{height:58px}
  .k-logo-text b{font-size:15px}
  .k-pagehead{padding:32px 0 30px}
  .k-pagehead-panel{padding:22px 20px}
  .k-section{padding:56px 0}
  .k-cta{padding:56px 0}
  .k-sec-head{margin-bottom:28px}
  .k-item{grid-template-columns:1fr}
  .k-item-media img{min-height:190px}
  .k-item-body{padding:20px}
  .k-grid-4{grid-template-columns:1fr}
  .k-footer-grid{grid-template-columns:1fr;gap:28px}
  .k-footer{padding-top:56px}
  .k-cta-actions .k-btn{width:100%}
  .k-form .k-btn{width:100%}
  .k-faq .accordion-button{padding:18px 40px 18px 0;font-size:15px}
  .k-faq .accordion-body{padding:0 24px 20px 0}
}
@media (max-width:520px){
  .k-anchors{gap:8px}
  .k-anchor{font-size:13px;padding:8px 14px}
  .k-stat b{font-size:22px}
  .k-cta-panel{padding:24px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .k-item:hover,.k-alert:hover,.k-btn:hover{transform:none!important}
}