.design-style-time_chain_digital_bridge_between_retro_and_future_kah{
  --bg:oklch(0.985 0.013 60);
  --bg-soft:oklch(0.973 0.016 60);
  --surface:oklch(0.962 0.02 60);
  --surface-2:oklch(0.944 0.024 60);
  --primary:oklch(0.54 0.09 60);
  --primary-deep:oklch(0.48 0.085 60);
  --secondary:oklch(0.62 0.09 20);
  --accent:oklch(0.66 0.11 210);
  --accent-2:oklch(0.78 0.07 210);
  --accent-soft:oklch(0.78 0.07 210 / .16);
  --text:oklch(0.28 0.022 60);
  --text-strong:oklch(0.24 0.024 60);
  --muted:oklch(0.47 0.02 60);
  --muted-soft:oklch(0.56 0.02 60);
  --line:oklch(0.86 0.03 60);
  --line-strong:oklch(0.74 0.05 60);
  --ink:oklch(0.30 0.03 60);
  --ink-text:oklch(0.96 0.02 60);
  --on-dark:oklch(0.90 0.02 60);
  --on-dark-soft:oklch(0.82 0.02 60);
  --container:1140px;--container-lg:1400px;--container-xl:1680px;
  --gutter:clamp(14px,2.2vw,28px);
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:22px;--sp-6:30px;--sp-7:44px;--sp-8:60px;
  --r-sm:8px;--r-md:12px;--r-lg:16px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(120,90,60,.06),0 1px 3px rgba(120,90,60,.08);
  --sh-2:0 6px 14px -3px rgba(120,90,60,.12),0 2px 6px -2px rgba(120,90,60,.08);
  --sh-3:0 22px 46px -12px rgba(120,90,60,.20),0 8px 18px -8px rgba(120,90,60,.11);
  --sh-hover:0 12px 26px -8px rgba(120,90,60,.17),0 4px 10px -4px rgba(120,90,60,.10);
  --fs-xs:clamp(.71rem,.69rem + .1vw,.77rem);
  --fs-sm:clamp(.81rem,.79rem + .15vw,.89rem);
  --fs-md:clamp(.94rem,.9rem + .25vw,1.05rem);
  --fs-lg:clamp(1.14rem,1.04rem + .5vw,1.38rem);
  --fs-xl:clamp(1.46rem,1.28rem + 1vw,1.96rem);
  --fs-2xl:clamp(1.86rem,1.48rem + 2vw,2.84rem);
  --fs-3xl:clamp(2.32rem,1.76rem + 3vw,3.5rem);
  --lh-tight:1.12;--lh-snug:1.3;--lh-body:1.6;
  --ls-wide:.08em;--ls-wider:.16em;--ls-widest:.2em;
  --ease:cubic-bezier(.4,0,.2,1);--ease-out:cubic-bezier(.16,1,.3,1);
  --t-fast:.15s;--t-base:.25s;--t-slow:.45s;
  font-family:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",ui-rounded,"Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:var(--lh-body);
  font-size:var(--fs-md);
  overflow-wrap:break-word;
  word-break:break-word;
  -webkit-font-smoothing:antialiased;
  position:relative;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah *,
.design-style-time_chain_digital_bridge_between_retro_and_future_kah *::before,
.design-style-time_chain_digital_bridge_between_retro_and_future_kah *::after{box-sizing:border-box;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah img{max-width:100%;height:auto;display:block;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah a{color:inherit;text-decoration:none;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah ul{margin:0;padding:0;list-style:none;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah h1,
.design-style-time_chain_digital_bridge_between_retro_and_future_kah h2,
.design-style-time_chain_digital_bridge_between_retro_and_future_kah h3,
.design-style-time_chain_digital_bridge_between_retro_and_future_kah h4{
  margin:0;font-weight:700;line-height:var(--lh-tight);letter-spacing:.008em;color:var(--text-strong);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah p{margin:0;}

/* ---- 顶部提示条 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-notice{
  display:flex;align-items:center;justify-content:center;gap:var(--sp-3);
  padding:var(--sp-2) var(--gutter);
  background:var(--ink);
  color:var(--ink-text);
  font-size:var(--fs-xs);
  letter-spacing:var(--ls-wide);
  text-align:center;
  position:relative;z-index:60;
  border-bottom:1px solid oklch(0.24 0.028 60);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-notice::before{
  content:"";width:6px;height:6px;border-radius:50%;flex:0 0 auto;
  background:var(--accent);box-shadow:0 0 0 3px oklch(0.66 0.11 210 / .22);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-notice span{min-width:0;}

/* ---- 布局容器 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wrap{
  width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter);
}

/* ---- 顶栏 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-head{
  position:sticky;top:0;z-index:50;
  background:oklch(0.985 0.013 60 / .9);
  -webkit-backdrop-filter:saturate(1.1) blur(10px);
  backdrop-filter:saturate(1.1) blur(10px);
  border-bottom:1px solid var(--line);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-head__in{
  display:flex;align-items:center;gap:var(--sp-4);
  padding:var(--sp-3) 0;min-width:0;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-brand{
  display:flex;align-items:center;gap:var(--sp-3);min-width:0;flex:1 1 auto;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-brand__mark{
  width:36px;height:36px;flex:0 0 auto;border-radius:var(--r-sm);
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  display:grid;place-items:center;color:oklch(0.97 0.015 60);
  box-shadow:var(--sh-1);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-brand__mark svg{width:21px;height:21px;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-brand__txt{min-width:0;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-brand__name{
  display:block;font-size:var(--fs-md);font-weight:800;letter-spacing:.05em;line-height:1.18;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-brand__sub{
  display:block;font-size:var(--fs-xs);color:var(--muted);letter-spacing:var(--ls-wider);text-transform:uppercase;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-nav{
  display:flex;align-items:center;gap:var(--sp-1);flex-wrap:wrap;justify-content:flex-end;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-nav a{
  font-size:var(--fs-sm);color:var(--muted);padding:var(--sp-2) var(--sp-3);
  border-radius:var(--r-pill);min-width:0;
  transition:color var(--t-fast) var(--ease),background var(--t-fast) var(--ease),transform var(--t-fast) var(--ease-out);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-nav a:hover{
  color:var(--text);background:var(--surface);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-nav .tc-nav__cta{
  background:var(--primary);color:oklch(0.97 0.015 60);font-weight:600;
  box-shadow:var(--sh-1);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-nav .tc-nav__cta:hover{
  background:var(--primary-deep);transform:translateY(-1px);box-shadow:var(--sh-2);
}

/* ---- HERO 分屏 + 斜切色带 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 0%,oklch(0.78 0.07 210 / .18),transparent 62%),
    radial-gradient(90% 70% at 6% 100%,oklch(0.62 0.09 20 / .12),transparent 60%),
    var(--bg);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__band{
  position:absolute;inset:-20% -30% auto auto;width:78%;height:150%;
  background:linear-gradient(180deg,oklch(0.54 0.09 60 / .09),oklch(0.54 0.09 60 / .02));
  transform:rotate(-14deg);
  pointer-events:none;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__band--b{
  inset:auto auto -30% -22%;width:64%;height:120%;
  background:linear-gradient(0deg,oklch(0.66 0.11 210 / .14),oklch(0.66 0.11 210 / .02));
  transform:rotate(12deg);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__in{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:var(--sp-6);align-items:center;
  padding:var(--sp-7) 0 var(--sp-6);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-kicker{
  display:inline-flex;align-items:center;gap:var(--sp-2);
  font-size:var(--fs-xs);letter-spacing:var(--ls-widest);text-transform:uppercase;
  color:var(--muted);border:1px dashed var(--line-strong);
  border-radius:var(--r-pill);padding:5px var(--sp-3);margin-bottom:var(--sp-4);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-kicker b{color:var(--accent);font-weight:700;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__title{
  font-size:var(--fs-3xl);line-height:var(--lh-tight);letter-spacing:-.012em;
  margin-bottom:var(--sp-4);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__title em{
  font-style:normal;color:var(--primary);
  background-image:linear-gradient(transparent 62%,oklch(0.66 0.11 210 / .26) 62%);
  padding:0 2px;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__lead{
  color:var(--muted);max-width:56ch;font-size:var(--fs-md);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-actions{
  display:flex;flex-wrap:wrap;gap:var(--sp-3);margin-top:var(--sp-5);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-2);
  padding:var(--sp-3) var(--sp-5);border-radius:var(--r-pill);
  font-size:var(--fs-sm);font-weight:600;letter-spacing:.03em;
  border:1px solid transparent;min-height:42px;min-width:0;
  transition:transform var(--t-base) var(--ease-out),box-shadow var(--t-base) var(--ease-out),background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-btn--solid{
  background:var(--primary);color:oklch(0.97 0.015 60);box-shadow:var(--sh-2);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-btn--solid:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-btn--ghost{
  border-color:var(--line-strong);color:var(--text);background:oklch(0.985 0.013 60 / .6);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-btn--ghost:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--accent);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-3);
  margin-top:var(--sp-5);padding-top:var(--sp-4);border-top:1px solid var(--line);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__stats>div{min-width:0;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stat__n{
  font-size:var(--fs-xl);font-weight:800;color:var(--primary);letter-spacing:-.02em;line-height:1.1;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stat__l{font-size:var(--fs-xs);color:var(--muted);letter-spacing:.05em;}

/* Hero 卡片堆叠 */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stack{position:relative;min-width:0;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stack__card{
  position:relative;margin:0;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--surface);
  box-shadow:var(--sh-2);
  animation:tc-float 7s var(--ease) infinite;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stack__card img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  filter:sepia(.18) saturate(.94) contrast(1.02);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stack__card figcaption{
  padding:var(--sp-3) var(--sp-4);font-size:var(--fs-xs);color:var(--muted);
  display:flex;justify-content:space-between;gap:var(--sp-3);border-top:1px dashed var(--line);
  flex-wrap:wrap;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stack__card figcaption b{color:var(--accent);font-weight:700;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stack__mini{
  position:absolute;right:calc(var(--sp-4) * -1);bottom:calc(var(--sp-6) * -1);
  width:46%;max-width:230px;margin:0;border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line);background:var(--bg);box-shadow:var(--sh-3);
  animation:tc-float 7s var(--ease) infinite reverse;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stack__mini img{width:100%;aspect-ratio:4/3;object-fit:cover;filter:sepia(.2) saturate(.9);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stack__mini span{
  display:block;padding:var(--sp-2) var(--sp-3);font-size:var(--fs-xs);color:var(--muted);
}
@keyframes tc-float{
  0%,100%{transform:translateY(0);}
  50%{transform:translateY(-8px);}
}
@keyframes tc-rise{
  from{transform:translateY(14px);}
  to{transform:translateY(0);}
}

/* ---- 粘性目录 + 主体布局 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-main{
  display:grid;grid-template-columns:minmax(0,232px) minmax(0,1fr);
  gap:var(--sp-6);align-items:start;
  padding:var(--sp-6) 0 var(--sp-7);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-main>main{min-width:0;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-aside{position:sticky;top:78px;min-width:0;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-toc{
  border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);
  padding:var(--sp-4);box-shadow:var(--sh-1);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-toc__h{
  font-size:var(--fs-xs);letter-spacing:var(--ls-wide);text-transform:uppercase;color:var(--muted);
  padding-bottom:var(--sp-3);margin-bottom:var(--sp-2);border-bottom:1px dashed var(--line);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-toc a{
  display:flex;align-items:center;gap:var(--sp-2);
  font-size:var(--fs-sm);color:var(--muted);padding:var(--sp-2);
  border-radius:var(--r-sm);border-left:2px solid transparent;
  transition:color var(--t-fast) var(--ease),background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
  min-width:0;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-toc a i{
  font-style:normal;font-size:var(--fs-xs);color:var(--line-strong);font-variant-numeric:tabular-nums;flex:0 0 auto;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-toc a:hover,
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-toc a:focus-visible{
  color:var(--text);background:var(--bg);border-left-color:var(--accent);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-aside__note{
  margin-top:var(--sp-3);font-size:var(--fs-xs);color:var(--muted);line-height:var(--lh-snug);
  padding:var(--sp-3);border:1px dashed var(--line-strong);border-radius:var(--r-md);
}

/* ---- 通用区块 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-sec{padding:var(--sp-6) 0;border-top:1px solid var(--line);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-sec:first-child{border-top:0;padding-top:0;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-sec__head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:var(--sp-4);
  margin-bottom:var(--sp-5);flex-wrap:wrap;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-sec__head>div{min-width:0;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-sec__k{
  font-size:var(--fs-xs);letter-spacing:var(--ls-widest);text-transform:uppercase;color:var(--accent);
  display:block;margin-bottom:var(--sp-2);font-weight:700;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-sec__t{font-size:var(--fs-xl);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-sec__d{font-size:var(--fs-sm);color:var(--muted);max-width:62ch;}

/* ---- 价格档位 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tiers{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-4);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:var(--sp-5);box-shadow:var(--sh-1);
  display:flex;flex-direction:column;gap:var(--sp-3);min-width:0;
  transition:transform var(--t-base) var(--ease-out),box-shadow var(--t-base) var(--ease-out);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier--pick{
  border-color:var(--accent);box-shadow:var(--sh-2);
  background:linear-gradient(180deg,oklch(0.78 0.07 210 / .12),var(--surface) 46%);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier--pick:hover{box-shadow:var(--sh-3);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier__tag{
  position:absolute;top:calc(var(--sp-4) * -1 + 2px);left:var(--sp-5);
  font-size:var(--fs-xs);font-weight:700;letter-spacing:.06em;
  background:var(--accent);color:oklch(0.99 0.01 210);
  padding:2px var(--sp-3);border-radius:var(--r-pill);box-shadow:var(--sh-1);
  max-width:calc(100% - var(--sp-5) * 2);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier__name{font-size:var(--fs-lg);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier__price{
  font-size:var(--fs-2xl);font-weight:800;color:var(--primary);letter-spacing:-.02em;line-height:1;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier__price small{font-size:var(--fs-xs);color:var(--muted);font-weight:600;letter-spacing:.03em;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier ul{display:grid;gap:var(--sp-2);font-size:var(--fs-sm);color:var(--muted);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier li{display:flex;gap:var(--sp-2);align-items:flex-start;min-width:0;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;margin-top:.55em;border-radius:2px;
  background:var(--accent);transform:rotate(45deg);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier__foot{
  margin-top:auto;padding-top:var(--sp-3);border-top:1px dashed var(--line);
  font-size:var(--fs-xs);color:var(--muted);
}

/* ---- 指导清单 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-3);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide__item{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:var(--sp-3);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:var(--sp-4);min-width:0;box-shadow:var(--sh-1);
  transition:transform var(--t-base) var(--ease-out),box-shadow var(--t-base) var(--ease-out),border-color var(--t-fast) var(--ease);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide__item:hover{
  transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--line-strong);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide__no{
  width:30px;height:30px;flex:0 0 auto;border-radius:var(--r-sm);
  display:grid;place-items:center;font-size:var(--fs-xs);font-weight:800;
  color:oklch(0.99 0.01 210);background:var(--primary);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide__item h4{font-size:var(--fs-md);margin-bottom:var(--sp-2);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide__item p{font-size:var(--fs-sm);color:var(--muted);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide__item code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;background:var(--accent-soft);color:var(--text);
  padding:1px 6px;border-radius:6px;border:1px solid var(--line);
  overflow-wrap:anywhere;
}

/* ---- 核心能力卡片（4） ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-caps{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-4);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:var(--sp-4);box-shadow:var(--sh-1);min-width:0;
  display:flex;flex-direction:column;gap:var(--sp-3);
  transition:transform var(--t-base) var(--ease-out),box-shadow var(--t-base) var(--ease-out),border-color var(--t-fast) var(--ease);
  animation:tc-rise .7s var(--ease-out) both;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap:nth-child(2){animation-delay:.08s;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap:nth-child(3){animation-delay:.16s;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap:nth-child(4){animation-delay:.24s;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:var(--line-strong);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap__ico{
  width:40px;height:40px;border-radius:var(--r-sm);display:grid;place-items:center;
  background:var(--accent-soft);border:1px solid var(--line);color:var(--accent);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap__ico svg{width:21px;height:21px;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap h3{font-size:var(--fs-md);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap p{font-size:var(--fs-sm);color:var(--muted);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap__m{
  margin-top:auto;font-size:var(--fs-xs);color:var(--primary);font-weight:700;
  padding-top:var(--sp-3);border-top:1px dashed var(--line);letter-spacing:.02em;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap figure{margin:0;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap figure img{width:100%;aspect-ratio:16/9;object-fit:cover;filter:sepia(.16) saturate(.95);}

/* ---- 工作流程：编号步骤卡 + 连接线 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-flow{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-4);
  position:relative;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-flow::before{
  content:"";position:absolute;left:2%;right:2%;top:26px;height:2px;
  background:repeating-linear-gradient(90deg,var(--line-strong) 0 8px,transparent 8px 16px);
  z-index:0;pointer-events:none;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-step{
  position:relative;z-index:1;min-width:0;
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r-md);
  padding:var(--sp-4);box-shadow:var(--sh-1);
  transition:transform var(--t-base) var(--ease-out),box-shadow var(--t-base) var(--ease-out),border-color var(--t-fast) var(--ease);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-step:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:var(--line-strong);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-step__n{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:var(--fs-sm);font-weight:800;color:oklch(0.97 0.015 60);
  background:var(--primary);box-shadow:var(--sh-1);margin-bottom:var(--sp-3);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-step h4{font-size:var(--fs-md);margin-bottom:var(--sp-2);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-step p{font-size:var(--fs-sm);color:var(--muted);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-step__t{
  display:inline-block;margin-top:var(--sp-3);font-size:var(--fs-xs);color:var(--accent);font-weight:700;
  border:1px solid var(--line);border-radius:var(--r-pill);padding:2px var(--sp-3);
}

/* ---- 合作墙 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-partners{
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:var(--sp-5);align-items:center;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-partners figure{margin:0;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-2);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-partners figure img{width:100%;aspect-ratio:16/10;object-fit:cover;filter:sepia(.15) saturate(.95);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wall{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-3);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wall div{
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);
  padding:var(--sp-3);font-size:var(--fs-sm);font-weight:700;color:var(--muted);
  display:flex;align-items:center;gap:var(--sp-2);min-width:0;box-shadow:var(--sh-1);
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease-out);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wall div:hover{color:var(--text);border-color:var(--accent);transform:translateY(-2px);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wall span{
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wall i{
  font-style:normal;width:8px;height:8px;flex:0 0 auto;border-radius:2px;background:var(--accent);transform:rotate(45deg);
}

/* ---- 内嵌色带 CTA（斜切） ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cta{
  position:relative;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,var(--surface),var(--bg));
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cta::after{
  content:"";position:absolute;inset:-40% -10% auto auto;width:52%;height:190%;
  background:linear-gradient(180deg,oklch(0.54 0.09 60 / .11),transparent 72%);
  transform:rotate(-13deg);pointer-events:none;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cta__in{
  position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:var(--sp-5);
  align-items:center;justify-content:space-between;
  padding:var(--sp-6) 0;
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cta__in>div{min-width:0;flex:1 1 320px;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cta__in .tc-actions{margin-top:0;flex:0 0 auto;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cta__t{font-size:var(--fs-xl);max-width:44ch;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cta__s{font-size:var(--fs-sm);color:var(--muted);margin-top:var(--sp-2);max-width:52ch;}

/* ---- 页脚 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot{
  background:var(--ink);color:var(--on-dark);
  padding:var(--sp-6) 0 var(--sp-5);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot__grid{
  display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:var(--sp-5);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot__grid>div{min-width:0;}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot h4{
  font-size:var(--fs-xs);letter-spacing:var(--ls-wider);text-transform:uppercase;
  color:var(--accent-2);margin-bottom:var(--sp-3);
}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot li{font-size:var(--fs-sm);padding:var(--sp-1) 0;color:var(--on-dark-soft);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot a{transition:color var(--t-fast) var(--ease);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot a:hover{color:oklch(0.99 0.01 210);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot__brand p{font-size:var(--fs-sm);color:oklch(0.80 0.02 60);max-width:44ch;margin-top:var(--sp-3);}
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot__bar{
  margin-top:var(--sp-5);padding-top:var(--sp-4);border-top:1px solid oklch(0.42 0.03 60);
  display:flex;flex-wrap:wrap;gap:var(--sp-3);justify-content:space-between;
  font-size:var(--fs-xs);color:oklch(0.76 0.02 60);
}

/* ---- 焦点态 ---- */
.design-style-time_chain_digital_bridge_between_retro_and_future_kah a:focus-visible,
.design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-btn:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-sm);
}

/* ===== 响应式 ===== */
@media (min-width:1600px){
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wrap{max-width:var(--container-lg);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-main{grid-template-columns:minmax(0,262px) minmax(0,1fr);gap:var(--sp-7);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-caps{grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-5);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide{grid-template-columns:repeat(3,minmax(0,1fr));}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-flow{grid-template-columns:repeat(4,minmax(0,1fr));}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__in{padding:var(--sp-8) 0 var(--sp-7);}
}
@media (min-width:2100px){
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wrap{max-width:var(--container-xl);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tiers{grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-5);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wall{grid-template-columns:repeat(4,minmax(0,1fr));}
}
@media (max-width:1024px){
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__in{grid-template-columns:minmax(0,1fr);gap:var(--sp-5);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-stack__mini{position:static;width:100%;max-width:none;margin-top:var(--sp-3);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-main{grid-template-columns:minmax(0,1fr);gap:var(--sp-5);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-aside{position:static;}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-toc{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px var(--sp-3);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-toc__h{grid-column:1 / -1;}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-caps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-flow::before{display:none;}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-partners{grid-template-columns:minmax(0,1fr);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot__grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tiers{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:640px){
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-head__in{flex-wrap:wrap;gap:var(--sp-2);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-nav{width:100%;justify-content:flex-start;gap:var(--sp-1);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-nav a{padding:var(--sp-2);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-2);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide{grid-template-columns:minmax(0,1fr);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-caps{grid-template-columns:minmax(0,1fr);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-flow{grid-template-columns:minmax(0,1fr);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wall{grid-template-columns:repeat(2,minmax(0,1fr));}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-foot__grid{grid-template-columns:minmax(0,1fr);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-toc{grid-template-columns:minmax(0,1fr);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cta__in{padding:var(--sp-5) 0;gap:var(--sp-4);}
}
@media (max-width:380px){
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah{font-size:.91rem;}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wrap{padding:0 var(--sp-3);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-notice{font-size:.68rem;letter-spacing:.03em;gap:var(--sp-2);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-sec{padding:var(--sp-5) 0;}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-tier,
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-cap,
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-step,
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-guide__item{padding:var(--sp-3);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-hero__stats{grid-template-columns:minmax(0,1fr);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-wall{grid-template-columns:minmax(0,1fr);}
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah .tc-btn{width:100%;justify-content:center;}
}
@media (prefers-reduced-motion:reduce){
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah *,
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah *::before,
  .design-style-time_chain_digital_bridge_between_retro_and_future_kah *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}