.design-style-professional_blockchain_application_development_web_design_skk {
  --bg: oklch(0.15 0.03 207);
  --surface: oklch(0.21 0.045 207);
  --surface-2: oklch(0.185 0.04 207);
  --surface-3: oklch(0.25 0.05 207);
  --primary: oklch(0.72 0.12 207);
  --secondary: oklch(0.62 0.12 255);
  --accent: oklch(0.78 0.14 42);
  --accent-2: oklch(0.9 0.1 42);
  --text: oklch(0.94 0.02 207);
  --muted: oklch(0.62 0.03 207);
  --line: oklch(0.34 0.035 207);
  --line-soft: oklch(0.28 0.035 207);
  --ink: oklch(0.16 0.03 207);
  --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: 42px; --sp-8: 56px;
  --r-sm: 10px; --r-md: 16px; --r-lg: 22px; --r-pill: 999px;
  --sh-1: 0 1px 0 rgba(255,255,255,.05) inset, 0 2px 8px rgba(0,0,0,.35);
  --sh-2: 0 1px 0 rgba(255,255,255,.06) inset, 0 10px 26px rgba(0,0,0,.45);
  --sh-3: 0 1px 0 rgba(255,255,255,.08) inset, 0 20px 52px rgba(0,0,0,.55);
  --fs-xs: clamp(.72rem,.7rem + .1vw,.78rem);
  --fs-sm: clamp(.82rem,.8rem + .15vw,.9rem);
  --fs-md: clamp(.95rem,.9rem + .25vw,1.06rem);
  --fs-lg: clamp(1.15rem,1.05rem + .5vw,1.4rem);
  --fs-xl: clamp(1.45rem,1.28rem + .9vw,1.92rem);
  --fs-2xl: clamp(1.9rem,1.5rem + 2vw,2.9rem);
  --fs-3xl: clamp(2.35rem,1.8rem + 2.8vw,3.5rem);
  --lh-tight: 1.12; --lh-snug: 1.32; --lh-body: 1.6;
  --ease: cubic-bezier(.4,0,.2,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
  --t-fast: .15s; --t-base: .25s; --t-slow: .45s;

  box-sizing: border-box;
  position: relative;
  display: block;
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
  background: var(--bg);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: var(--fs-md);
  line-height: var(--lh-body);
  overflow-wrap: break-word;
  word-break: break-word;
  -webkit-font-smoothing: antialiased;
}
.design-style-professional_blockchain_application_development_web_design_skk *,
.design-style-professional_blockchain_application_development_web_design_skk *::before,
.design-style-professional_blockchain_application_development_web_design_skk *::after { box-sizing: border-box; }
.design-style-professional_blockchain_application_development_web_design_skk img { max-width: 100%; height: auto; display: block; }
.design-style-professional_blockchain_application_development_web_design_skk a { color: inherit; text-decoration: none; }
.design-style-professional_blockchain_application_development_web_design_skk ul,
.design-style-professional_blockchain_application_development_web_design_skk ol { margin: 0; padding: 0; list-style: none; }
.design-style-professional_blockchain_application_development_web_design_skk p,
.design-style-professional_blockchain_application_development_web_design_skk h1,
.design-style-professional_blockchain_application_development_web_design_skk h2,
.design-style-professional_blockchain_application_development_web_design_skk h3,
.design-style-professional_blockchain_application_development_web_design_skk h4,
.design-style-professional_blockchain_application_development_web_design_skk figure { margin: 0; }
.design-style-professional_blockchain_application_development_web_design_skk :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* ============ 顶部参考提示条 ============ */
.design-style-professional_blockchain_application_development_web_design_skk .bc-refbar {
  position: relative;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: 100%;
  padding: var(--sp-2) var(--gutter);
  background: linear-gradient(90deg, oklch(0.2 0.045 207), oklch(0.18 0.04 207));
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-xs);
  letter-spacing: .08em;
  color: var(--accent-2);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-refbar .dot {
  width: 8px; height: 8px; flex: none;
  border-radius: var(--r-pill);
  background: var(--accent);
  box-shadow: 0 0 0 4px oklch(0.78 0.14 42 / .18);
  animation: bc-pulse 2.4s var(--ease) infinite;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-refbar b { color: var(--text); font-weight: 600; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-refbar .ref-tag {
  margin-left: auto;
  color: var(--muted);
  white-space: nowrap;
}

/* ============ 布局容器 ============ */
.design-style-professional_blockchain_application_development_web_design_skk .bc-wrap {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ============ 顶栏导航（错位拼贴） ============ */
.design-style-professional_blockchain_application_development_web_design_skk .bc-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(0.17 0.035 207 / .86);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-nav-in {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding-block: var(--sp-3);
  min-width: 0;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-brand {
  display: flex; align-items: center; gap: var(--sp-2);
  font-weight: 700; letter-spacing: .04em;
  font-size: var(--fs-sm);
  flex: none; min-width: 0;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-brand .mark {
  width: 26px; height: 26px; flex: none;
  border-radius: var(--r-pill);
  background: conic-gradient(from 210deg, var(--primary), var(--secondary) 55%, var(--accent) 88%, var(--primary));
  box-shadow: var(--sh-1);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-nav-links {
  display: flex; align-items: center; gap: var(--sp-2);
  margin-left: auto; min-width: 0; flex-wrap: wrap;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-nav-links a {
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-pill);
  font-size: var(--fs-xs);
  color: var(--muted);
  border: 1px solid transparent;
  transition: color var(--t-base) var(--ease), border-color var(--t-base) var(--ease), background var(--t-base) var(--ease);
  white-space: nowrap;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-nav-links a:hover,
.design-style-professional_blockchain_application_development_web_design_skk .bc-nav-links a:focus-visible {
  color: var(--text);
  border-color: var(--line);
  background: var(--surface-3);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-nav-cta {
  flex: none;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-pill);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--ink);
  background: var(--accent);
  box-shadow: var(--sh-2);
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease), filter var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--sh-3);
}

/* ============ Hero：非对称错落 + 环形放射 ============ */
.design-style-professional_blockchain_application_development_web_design_skk .bc-hero {
  position: relative;
  padding-block: var(--sp-7) var(--sp-6);
  overflow: hidden;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-halftone {
  position: absolute;
  inset: -10% -18% auto auto;
  width: 60%;
  aspect-ratio: 1 / 1;
  background-image: radial-gradient(oklch(0.78 0.14 42 / .3) 1.6px, transparent 1.7px);
  background-size: 14px 14px;
  -webkit-mask-image: radial-gradient(circle at 72% 26%, #000 0%, transparent 68%);
  mask-image: radial-gradient(circle at 72% 26%, #000 0%, transparent 68%);
  pointer-events: none;
  z-index: 0;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-rings {
  position: absolute;
  top: -56px; right: -56px;
  width: min(520px, 58vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 1px solid var(--line);
  pointer-events: none;
  z-index: 0;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-rings::before,
.design-style-professional_blockchain_application_development_web_design_skk .bc-rings::after {
  content: "";
  position: absolute; inset: 16%;
  border-radius: 50%;
  border: 1px dashed oklch(0.72 0.12 207 / .32);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-rings::after {
  inset: 34%;
  border-style: solid;
  border-color: oklch(0.62 0.12 255 / .36);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: var(--sp-6);
  align-items: center;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-kicker {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-3);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: var(--fs-xs);
  color: var(--primary);
  background: var(--surface);
  letter-spacing: .06em;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-h1 {
  margin-top: var(--sp-4);
  font-size: var(--fs-3xl);
  line-height: var(--lh-tight);
  letter-spacing: -.02em;
  font-weight: 800;
  max-width: 18ch;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-h1 .em {
  color: var(--accent);
  background: linear-gradient(transparent 62%, oklch(0.78 0.14 42 / .22) 62%);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-h1 .outline {
  color: transparent;
  -webkit-text-fill-color: transparent;
  -webkit-text-stroke: 1px var(--primary);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-sub {
  margin-top: var(--sp-4);
  color: var(--muted);
  font-size: var(--fs-sm);
  max-width: 54ch;
  line-height: var(--lh-body);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-hero-stats {
  display: flex; flex-wrap: wrap; gap: var(--sp-2);
  margin-top: var(--sp-5);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-stat {
  flex: 1 1 130px;
  min-width: 0;
  padding: var(--sp-3);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  box-shadow: var(--sh-1);
  transition: transform var(--t-base) var(--ease), border-color var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-stat:hover {
  transform: translateY(-2px);
  border-color: var(--line-soft);
  box-shadow: var(--sh-2);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-stat .n {
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--accent-2);
  letter-spacing: -.01em;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-stat .l {
  font-size: var(--fs-xs);
  color: var(--muted);
  margin-top: var(--sp-1);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-hero-actions {
  display: flex; flex-wrap: wrap; gap: var(--sp-3);
  margin-top: var(--sp-5);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-btn {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  min-height: 44px;
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--r-pill);
  font-size: var(--fs-sm);
  font-weight: 700;
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease), background var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-btn-solid {
  color: var(--ink);
  background: var(--accent);
  box-shadow: var(--sh-2);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-btn-solid:hover { transform: translateY(-2px); box-shadow: var(--sh-3); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-btn-ghost {
  color: var(--text);
  border: 1px solid var(--line);
  background: oklch(0.21 0.045 207 / .7);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-btn-ghost:hover { transform: translateY(-2px); border-color: var(--primary); }

/* Hero 右侧拼贴图组 */
.design-style-professional_blockchain_application_development_web_design_skk .bc-collage {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-shot {
  position: relative;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--sh-2);
  min-width: 0;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-shot img {
  width: 100%; height: 100%; object-fit: cover;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-shot.tall { grid-row: span 2; aspect-ratio: 3 / 5; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-shot.wide { aspect-ratio: 4 / 3; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-shot .cap {
  position: absolute; left: var(--sp-2); bottom: var(--sp-2);
  padding: var(--sp-1) var(--sp-2);
  font-size: var(--fs-xs);
  border-radius: var(--r-pill);
  background: oklch(0.15 0.03 207 / .82);
  color: var(--accent-2);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-collage .stamp {
  position: absolute;
  left: -16px; bottom: -16px;
  width: 80px; height: 80px;
  border-radius: 50%;
  display: grid; place-items: center;
  text-align: center;
  font-size: var(--fs-xs);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
  background: var(--accent-2);
  box-shadow: var(--sh-3);
  transform: rotate(-12deg);
}

/* ============ 主体：粘性侧栏目录 + 内容 ============ */
.design-style-professional_blockchain_application_development_web_design_skk .bc-body {
  padding-block: var(--sp-7);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: var(--sp-6);
  align-items: start;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-toc {
  position: sticky;
  top: 74px;
  align-self: start;
  padding: var(--sp-4);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--sh-1);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-toc .tt {
  font-size: var(--fs-xs);
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: var(--sp-3);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-toc a {
  display: block;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  font-size: var(--fs-xs);
  color: var(--muted);
  transition: color var(--t-base) var(--ease), background var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-toc a:hover,
.design-style-professional_blockchain_application_development_web_design_skk .bc-toc a:focus-visible {
  color: var(--text);
  background: var(--surface-3);
  border-left-color: var(--accent);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-toc-note {
  margin-top: var(--sp-3);
  padding-top: var(--sp-3);
  border-top: 1px dashed var(--line);
  font-size: var(--fs-xs);
  color: var(--muted);
  line-height: var(--lh-snug);
}

/* 区块通用 */
.design-style-professional_blockchain_application_development_web_design_skk .bc-sec { margin-bottom: var(--sp-7); min-width: 0; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-sec:last-child { margin-bottom: 0; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-sec-head {
  display: flex; align-items: baseline; gap: var(--sp-3);
  flex-wrap: wrap;
  margin-bottom: var(--sp-4);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-sec-head .idx {
  font-size: var(--fs-xs);
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 0 var(--sp-2);
  line-height: 1.7;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-sec-head h2 {
  font-size: var(--fs-xl);
  line-height: var(--lh-snug);
  letter-spacing: -.01em;
  font-weight: 800;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-sec-head .note {
  font-size: var(--fs-xs);
  color: var(--muted);
  margin-left: auto;
}

/* 最新动态：错位资讯拼贴 */
.design-style-professional_blockchain_application_development_web_design_skk .bc-news {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card {
  display: flex; flex-direction: column;
  min-width: 0;
  padding: var(--sp-4);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  box-shadow: var(--sh-1);
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--sh-2);
  border-color: oklch(0.72 0.12 207 / .5);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card .meta {
  display: flex; align-items: center; gap: var(--sp-2);
  font-size: var(--fs-xs);
  color: var(--muted);
  margin-bottom: var(--sp-2);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card .tag {
  color: var(--primary);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 0 var(--sp-2);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card h3 {
  font-size: var(--fs-sm);
  line-height: var(--lh-snug);
  font-weight: 700;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card p {
  margin-top: var(--sp-2);
  font-size: var(--fs-xs);
  color: var(--muted);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card .kpi {
  margin-top: auto;
  padding-top: var(--sp-3);
  font-size: var(--fs-xs);
  color: var(--accent-2);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card.wide { grid-column: span 2; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card .thumb {
  aspect-ratio: 16 / 9;
  border-radius: var(--r-sm);
  overflow: hidden;
  margin-bottom: var(--sp-3);
  border: 1px solid var(--line);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-news-card .thumb img { width: 100%; height: 100%; object-fit: cover; }

/* 工作流程步骤 */
.design-style-professional_blockchain_application_development_web_design_skk .bc-flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--sp-3);
  counter-reset: flow;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-flow-step {
  position: relative;
  min-width: 0;
  padding: var(--sp-4) var(--sp-3);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, var(--surface-3), var(--surface-2));
  box-shadow: var(--sh-1);
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-flow-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--sh-2);
  border-color: oklch(0.72 0.12 207 / .45);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-flow-step::before {
  counter-increment: flow;
  content: "0" counter(flow);
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 800;
  color: var(--ink);
  background: var(--accent);
  border-radius: var(--r-pill);
  padding: 0 var(--sp-2);
  margin-bottom: var(--sp-2);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-flow-step h3 { font-size: var(--fs-sm); font-weight: 700; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-flow-step p { margin-top: var(--sp-2); font-size: var(--fs-xs); color: var(--muted); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-flow-step .out {
  margin-top: var(--sp-3);
  padding-top: var(--sp-2);
  border-top: 1px dashed var(--line);
  font-size: var(--fs-xs);
  color: var(--accent-2);
}

/* 横向滚动卡片带：特性 5 张 */
.design-style-professional_blockchain_application_development_web_design_skk .bc-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(228px, 1fr);
  gap: var(--sp-4);
  overflow-x: auto;
  padding-bottom: var(--sp-3);
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-rail::-webkit-scrollbar { height: 8px; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-rail::-webkit-scrollbar-thumb { background: var(--line); border-radius: var(--r-pill); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-feat {
  scroll-snap-align: start;
  min-width: 0;
  padding: var(--sp-5) var(--sp-4);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--sh-1);
  transition: transform var(--t-base) var(--ease), border-color var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-feat:hover {
  transform: translateY(-4px);
  border-color: oklch(0.78 0.14 42 / .55);
  box-shadow: var(--sh-2);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-feat .ico {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--surface-3);
  color: var(--primary);
  margin-bottom: var(--sp-3);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-feat h3 { font-size: var(--fs-sm); font-weight: 700; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-feat p { margin-top: var(--sp-2); font-size: var(--fs-xs); color: var(--muted); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-feat .spec {
  margin-top: var(--sp-3);
  font-size: var(--fs-xs);
  color: var(--accent-2);
}

/* FAQ */
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq { display: grid; gap: var(--sp-3); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq details {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  box-shadow: var(--sh-1);
  overflow: hidden;
  transition: border-color var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq details:hover { border-color: var(--line-soft); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq details[open] { box-shadow: var(--sh-2); border-color: oklch(0.72 0.12 207 / .4); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq summary {
  cursor: pointer;
  list-style: none;
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-4);
  font-size: var(--fs-sm);
  font-weight: 700;
  min-height: 44px;
  transition: color var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq summary:hover { color: var(--accent-2); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq summary::-webkit-details-marker { display: none; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq summary::after {
  content: "+";
  margin-left: auto;
  color: var(--accent);
  font-weight: 800;
  transition: transform var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq details[open] summary::after { transform: rotate(45deg); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq .ans {
  padding: 0 var(--sp-4) var(--sp-4);
  font-size: var(--fs-xs);
  color: var(--muted);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-faq .ans b { color: var(--accent-2); }

/* 应用场景展示 */
.design-style-professional_blockchain_application_development_web_design_skk .bc-cases {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-4);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-case {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: var(--sp-3);
  align-items: stretch;
  min-width: 0;
  padding: var(--sp-3);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--sh-1);
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-case:hover {
  transform: translateY(-3px);
  box-shadow: var(--sh-2);
  border-color: var(--line-soft);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-case .pic {
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 1 / 1;
  min-width: 0;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-case .pic img { width: 100%; height: 100%; object-fit: cover; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-case h3 { font-size: var(--fs-sm); font-weight: 700; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-case p { margin-top: var(--sp-2); font-size: var(--fs-xs); color: var(--muted); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-case .nums {
  display: flex; gap: var(--sp-3); flex-wrap: wrap;
  margin-top: var(--sp-3);
  font-size: var(--fs-xs);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-case .nums span { color: var(--accent-2); }

/* 实用指导清单 */
.design-style-professional_blockchain_application_development_web_design_skk .bc-guide {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3) var(--sp-5);
  padding: var(--sp-5);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, oklch(0.22 0.05 207), oklch(0.18 0.04 207));
  box-shadow: var(--sh-1);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-guide li {
  position: relative;
  min-width: 0;
  padding-left: var(--sp-6);
  font-size: var(--fs-xs);
  color: var(--muted);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-guide li strong { display: block; color: var(--text); font-size: var(--fs-sm); margin-bottom: var(--sp-1); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-guide li::before {
  content: "✓";
  position: absolute; left: 0; top: 2px;
  width: 20px; height: 20px;
  display: grid; place-items: center;
  border-radius: var(--r-pill);
  font-size: var(--fs-xs);
  color: var(--ink);
  background: var(--accent);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-guide li em { color: var(--accent-2); font-style: normal; }

/* CTA 内嵌色带 */
.design-style-professional_blockchain_application_development_web_design_skk .bc-cta {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
  gap: var(--sp-5);
  align-items: center;
  padding: var(--sp-6);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--sh-2);
  overflow: hidden;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-cta::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--primary), var(--secondary) 60%, var(--accent));
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-cta h2 { font-size: var(--fs-xl); line-height: var(--lh-snug); font-weight: 800; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-cta p { margin-top: var(--sp-3); font-size: var(--fs-sm); color: var(--muted); max-width: 60ch; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-cta .cta-side { display: grid; gap: var(--sp-3); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-cta .chk {
  font-size: var(--fs-xs); color: var(--muted);
  padding: var(--sp-3);
  border: 1px dashed var(--line);
  border-radius: var(--r-sm);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-cta .chk b { color: var(--accent-2); }

/* 页脚 */
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot {
  border-top: 1px solid var(--line);
  background: oklch(0.17 0.035 207);
  padding-block: var(--sp-6) var(--sp-5);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) repeat(3, minmax(0, .7fr));
  gap: var(--sp-5);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot h4 { font-size: var(--fs-xs); letter-spacing: .1em; color: var(--muted); margin-bottom: var(--sp-3); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot li { font-size: var(--fs-xs); color: var(--muted); padding-block: var(--sp-1); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot li a { transition: color var(--t-fast) var(--ease); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot li a:hover { color: var(--accent-2); }
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot .brandline { font-size: var(--fs-sm); font-weight: 700; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot .desc { margin-top: var(--sp-2); font-size: var(--fs-xs); color: var(--muted); max-width: 42ch; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot-bottom {
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px dashed var(--line);
  display: flex; flex-wrap: wrap; gap: var(--sp-3);
  align-items: center;
  font-size: var(--fs-xs);
  color: var(--muted);
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-foot-bottom .badge {
  padding: var(--sp-1) var(--sp-3);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--primary);
}

/* ============ 动效：渐显错峰（默认可见，加载即自动播放） ============ */
@keyframes bc-fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes bc-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-fade {
  animation: bc-fade-up .7s var(--ease-out) both;
}
.design-style-professional_blockchain_application_development_web_design_skk .bc-d1 { animation-delay: .05s; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-d2 { animation-delay: .14s; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-d3 { animation-delay: .23s; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-d4 { animation-delay: .32s; }
.design-style-professional_blockchain_application_development_web_design_skk .bc-d5 { animation-delay: .41s; }

/* ============ 响应式 ============ */
@media (min-width: 1600px) {
  .design-style-professional_blockchain_application_development_web_design_skk .bc-wrap { max-width: var(--container-lg); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-news { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-news-card.wide { grid-column: span 2; }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-flow { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-cases { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-layout { grid-template-columns: 240px minmax(0, 1fr); gap: var(--sp-7); }
}
@media (min-width: 2200px) {
  .design-style-professional_blockchain_application_development_web_design_skk .bc-wrap { max-width: var(--container-xl); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-rail { grid-auto-columns: minmax(264px, 1fr); }
}
@media (max-width: 1024px) {
  .design-style-professional_blockchain_application_development_web_design_skk .bc-hero-grid { grid-template-columns: minmax(0, 1fr); gap: var(--sp-5); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-layout { grid-template-columns: minmax(0, 1fr); gap: var(--sp-5); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-toc { position: static; }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-toc a { display: inline-block; border-left: none; border: 1px solid var(--line); margin: 2px 4px 2px 0; }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-news { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-cases { grid-template-columns: minmax(0, 1fr); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-cta { grid-template-columns: minmax(0, 1fr); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .design-style-professional_blockchain_application_development_web_design_skk .bc-nav-links { display: none; }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-nav-cta { margin-left: auto; }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-hero { padding-block: var(--sp-5) var(--sp-4); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-news { grid-template-columns: minmax(0, 1fr); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-news-card.wide { grid-column: auto; }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-flow { grid-template-columns: minmax(0, 1fr); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-guide { grid-template-columns: minmax(0, 1fr); padding: var(--sp-4); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-case { grid-template-columns: minmax(0, 1fr); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-foot-grid { grid-template-columns: minmax(0, 1fr); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-sec-head .note { margin-left: 0; }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-collage .stamp { display: none; }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-body { padding-block: var(--sp-5); }
}
@media (max-width: 380px) {
  .design-style-professional_blockchain_application_development_web_design_skk { font-size: var(--fs-sm); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-wrap { padding-inline: var(--sp-3); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-refbar { font-size: .68rem; padding-inline: var(--sp-3); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-refbar .ref-tag { display: none; }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-h1 { font-size: clamp(1.7rem, 8vw, 2.2rem); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-rail { grid-auto-columns: minmax(206px, 1fr); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-cta { padding: var(--sp-4); }
  .design-style-professional_blockchain_application_development_web_design_skk .bc-btn { width: 100%; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  .design-style-professional_blockchain_application_development_web_design_skk .bc-fade,
  .design-style-professional_blockchain_application_development_web_design_skk .bc-refbar .dot {
    animation: none !important;
  }
  .design-style-professional_blockchain_application_development_web_design_skk *,
  .design-style-professional_blockchain_application_development_web_design_skk *::before,
  .design-style-professional_blockchain_application_development_web_design_skk *::after {
    transition-duration: .01ms !important;
  }
}