/* ============================================
   黑客24小时在线接单 · 科技霓虹主题
   Design: Dark Tech + Neon Cyan + Purple Gradient
   ============================================ */

:root {
  --bg: #0a1628;
  --bg-2: #0f1e35;
  --bg-3: #152744;
  --card: #132238;
  --card-h: #1a2d4a;
  --border: rgba(0, 212, 255, 0.12);
  --border-2: rgba(139, 92, 246, 0.15);
  --text: #e6edf7;
  --text-2: #94a3b8;
  --text-3: #64748b;
  --cyan: #00d4ff;
  --cyan-d: #00b8e0;
  --purple: #8b5cf6;
  --purple-d: #7c3aed;
  --accent: #06b6d4;
  --grad: linear-gradient(135deg, #00d4ff 0%, #8b5cf6 100%);
  --grad-2: linear-gradient(135deg, #06b6d4 0%, #6366f1 100%);
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html, body { width: 100%; overflow-x: hidden; }

body.zbc280body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
ul, ol { list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
svg { vertical-align: middle; }

.zbc280wrap {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 按钮 ---------- */
.zbc280btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.zbc280btnprimary {
  background: var(--grad);
  color: #fff !important;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}
.zbc280btnprimary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
}
.zbc280btnline {
  background: transparent;
  color: var(--text) !important;
  border: 1px solid var(--border);
}
.zbc280btnline:hover {
  border-color: var(--cyan);
  color: var(--cyan) !important;
}
.zbc280btnwhite {
  background: #fff;
  color: var(--bg) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}
.zbc280btnwhite:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}
.zbc280btnglow {
  background: var(--grad);
  color: #fff !important;
  padding: 8px 20px;
  font-size: 14px;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 212, 255, 0.3);
}
.zbc280btnglow:hover {
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.5);
  transform: translateY(-1px);
}
.zbc280btnblock { width: 100%; }

/* ---------- 顶部导航 ---------- */
.zbc280navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.zbc280navinner {
  display: flex;
  align-items: center;
  min-height: 68px;
  gap: 16px;
}
.zbc280brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: #fff;
  flex-shrink: 0;
}
.zbc280branddot {
  width: 10px; height: 10px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--cyan);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 12px var(--cyan); }
  50% { opacity: 0.6; box-shadow: 0 0 20px var(--cyan); }
}
.zbc280brandname { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.zbc280topnav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.zbc280topnav ul {
  display: flex;
  gap: 4px;
}
.zbc280topnav a {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text-2);
  border-radius: 6px;
  font-weight: 500;
}
.zbc280topnav a:hover { color: var(--cyan); background: rgba(0, 212, 255, 0.08); }

/* 移动端菜单 */
.zbc280menutg { position: absolute; left: -9999px; opacity: 0; }
.zbc280menubtn {
  display: none;
  margin-left: auto;
  width: 40px; height: 40px;
  cursor: pointer;
  position: relative;
}
.zbc280menubtn i {
  position: absolute;
  left: 8px; right: 8px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.zbc280menubtn i:nth-child(1) { top: 14px; }
.zbc280menubtn i:nth-child(2) { top: 19px; }
.zbc280menubtn i:nth-child(3) { top: 24px; }

/* ---------- Hero 首屏 ---------- */
.zbc280hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 100px;
  overflow: hidden;
}
.zbc280herobg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  z-index: 0;
}
.zbc280herogrid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  z-index: 0;
}
.zbc280herocontent {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}
.zbc280herotag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 100px;
  font-size: 14px;
  color: var(--cyan);
  margin-bottom: 28px;
  font-weight: 500;
}
.zbc280pulsedot {
  width: 8px; height: 8px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse-dot 1.5s ease-in-out infinite;
}
.zbc280herotitle {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}
.zbc280gradienttext {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.zbc280herodesc {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.9;
  max-width: 680px;
  margin: 0 auto 36px;
}
.zbc280herocta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* 浮动数据条 */
.zbc280herostats {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow), var(--shadow-glow);
  overflow: hidden;
  width: 92%;
  max-width: 900px;
  padding: 0;
}
.zbc280statitem {
  text-align: center;
  padding: 24px 16px;
  border-right: 1px solid var(--border);
}
.zbc280statitem:last-child { border-right: none; }
.zbc280statitem strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin-bottom: 4px;
}
.zbc280statitem span {
  font-size: 13px;
  color: var(--text-3);
}

/* ---------- 广告位 ---------- */
.zbc280adzone {
  padding: 70px 0 20px;
  background: var(--bg-2);
}

/* ---------- 通用区块 ---------- */
.zbc280section {
  padding: 90px 0;
  position: relative;
}
.zbc280sechead {
  text-align: center;
  margin-bottom: 56px;
}
.zbc280seclabel {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.zbc280sechead h2 {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 700;
  margin-bottom: 14px;
  color: #fff;
}
.zbc280sechead p {
  font-size: 16px;
  color: var(--text-2);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---------- 核心服务卡片 ---------- */
.zbc280service { background: var(--bg); }
.zbc280cardgrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.zbc280card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}
.zbc280card:before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.zbc280card:hover {
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 212, 255, 0.08);
  background: var(--card-h);
}
.zbc280card:hover:before { transform: scaleX(1); }
.zbc280cardicon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #fff;
}
.zbc280icon1 { background: linear-gradient(135deg, #00d4ff, #0099cc); }
.zbc280icon2 { background: linear-gradient(135deg, #8b5cf6, #6366f1); }
.zbc280icon3 { background: linear-gradient(135deg, #10b981, #059669); }
.zbc280icon4 { background: linear-gradient(135deg, #f59e0b, #d97706); }
.zbc280icon5 { background: linear-gradient(135deg, #ef4444, #dc2626); }
.zbc280icon6 { background: linear-gradient(135deg, #ec4899, #be185d); }
.zbc280cardtag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 212, 255, 0.1);
  color: var(--cyan);
  font-size: 12px;
  border-radius: 100px;
  margin-bottom: 12px;
  font-weight: 600;
}
.zbc280cardbody h3 {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.zbc280cardbody p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 16px;
}
.zbc280cardlink {
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.zbc280cardlink:hover {
  color: var(--purple);
  gap: 8px;
}

/* ---------- 核心优势 ---------- */
.zbc280advsec { background: var(--bg-2); }
.zbc280advgrid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}
.zbc280advleft h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  margin: 14px 0 18px;
  color: #fff;
}
.zbc280advleft p {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.9;
  margin-bottom: 28px;
}
.zbc280advright {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.zbc280advitem {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
}
.zbc280advitem:hover {
  border-color: rgba(139, 92, 246, 0.3);
  background: var(--card-h);
  transform: translateX(6px);
}
.zbc280advnum {
  flex-shrink: 0;
  width: 48px; height: 48px;
  background: var(--grad-2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 800;
  color: #fff;
}
.zbc280advtext h3 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.zbc280advtext p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

/* ---------- 接单流程 ---------- */
.zbc280stepssec { background: var(--bg); }
.zbc280steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.zbc280step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all 0.3s ease;
  position: relative;
}
.zbc280step:hover {
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}
.zbc280stepicon {
  width: 52px; height: 52px;
  background: rgba(0, 212, 255, 0.12);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  margin-bottom: 18px;
}
.zbc280stepnum {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--purple);
  margin-bottom: 8px;
}
.zbc280stepbody h3 {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.zbc280stepbody p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.75;
}

/* ---------- CTA横幅 ---------- */
.zbc280ctabanner {
  background: var(--grad);
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}
.zbc280ctabanner:before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 40%),
    radial-gradient(circle at 80% 50%, rgba(255,255,255,0.08) 0%, transparent 40%);
}
.zbc280ctacontent {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  position: relative;
  z-index: 1;
}
.zbc280ctacontent h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.zbc280ctacontent p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- 联系我们 ---------- */
.zbc280contactsec { background: var(--bg-2); }
.zbc280contactgrid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 30px;
}
.zbc280contactform {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}
.zbc280contactform h3,
.zbc280contactinfo h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.zbc280contactsub {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 24px;
}
.zbc280formrow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.zbc280field {
  margin-bottom: 16px;
}
.zbc280formrow .zbc280field { margin-bottom: 0; }
.zbc280field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 8px;
}
.zbc280field input,
.zbc280field select,
.zbc280field textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  transition: all 0.25s ease;
  outline: none;
}
.zbc280field input:focus,
.zbc280field select:focus,
.zbc280field textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}
.zbc280field textarea { resize: vertical; min-height: 100px; }
.zbc280formtip {
  margin-top: 14px;
  font-size: 12px;
  color: var(--text-3);
  text-align: center;
}

.zbc280contactinfo {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}
.zbc280infolist {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.zbc280infolist li {
  display: flex;
  gap: 14px;
  padding: 14px;
  background: var(--bg-3);
  border-radius: 10px;
  transition: all 0.25s ease;
}
.zbc280infolist li:hover {
  background: rgba(0, 212, 255, 0.06);
  border-left: 3px solid var(--cyan);
  padding-left: 11px;
}
.zbc280infoicon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  background: rgba(0, 212, 255, 0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
}
.zbc280infolist span {
  display: block;
  font-size: 12px;
  color: var(--text-3);
  margin-bottom: 2px;
}
.zbc280infolist strong {
  font-size: 14px;
  color: #fff;
  font-weight: 600;
}

/* ---------- FAQ ---------- */
.zbc280faqsec { background: var(--bg); }
.zbc280faqlist {
  max-width: 800px;
  margin: 0 auto;
}
.zbc280faqlist details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}
.zbc280faqlist details[open] {
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}
.zbc280faqlist summary {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  list-style: none;
  transition: background 0.25s ease;
}
.zbc280faqlist summary::-webkit-details-marker { display: none; }
.zbc280faqlist summary:hover { background: var(--card-h); }
.zbc280faqq {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  line-height: 1.6;
}
.zbc280faqicon {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.12);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  transition: all 0.3s ease;
}
.zbc280faqlist details[open] .zbc280faqicon {
  background: var(--cyan);
  color: var(--bg);
  transform: rotate(45deg);
}
.zbc280faqa {
  padding: 0 24px 22px;
}
.zbc280faqa p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.85;
  padding-top: 4px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ---------- 数据大屏 / 关于我们 ---------- */
.zbc280aboutsec { background: var(--bg-2); }
.zbc280databoard {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 20px;
}
.zbc280datacard {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: all 0.3s ease;
}
.zbc280datacard:hover {
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}
.zbc280datamain {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(139, 92, 246, 0.08));
  border-color: rgba(0, 212, 255, 0.2);
}
.zbc280datalabel {
  display: block;
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 10px;
  font-weight: 500;
}
.zbc280datanum {
  display: block;
  font-size: 42px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1.2;
  margin-bottom: 10px;
}
.zbc280datanum span {
  font-size: 20px;
  font-weight: 700;
  -webkit-text-fill-color: inherit;
  margin-left: 2px;
}
.zbc280datacard p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.6;
}
.zbc280datamain .zbc280datanum { font-size: 56px; }
.zbc280datamain p { font-size: 14px; max-width: 300px; margin: 0 auto; }

/* ---------- 友情链接 ---------- */
.zbc280flinksec { background: var(--bg); }
.zbc280flinkcloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  justify-content: center;
  max-width: 900px;
  margin: 0 auto;
}
.zbc280flinkcloud a {
  display: inline-block;
  padding: 8px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-2);
  transition: all 0.25s ease;
}
.zbc280flinkcloud a:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 页脚 ---------- */
.zbc280footer {
  background: #060e1c;
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
}
.zbc280footinner {
  text-align: center;
}
.zbc280footbrand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}
.zbc280footbrand strong {
  font-size: 20px;
  color: #fff;
  font-weight: 700;
}
.zbc280footnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin-bottom: 24px;
}
.zbc280footnav a {
  font-size: 14px;
  color: var(--text-2);
}
.zbc280footnav a:hover { color: var(--cyan); }
.zbc280footcopy {
  font-size: 12px;
  color: var(--text-3);
  line-height: 2;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.zbc280footcopy a { color: var(--cyan); }
.zbc280footcopy strong { color: var(--cyan); }

/* ============================================
   响应式适配
   ============================================ */
@media (max-width: 960px) {
  .zbc280topnav { display: none; }
  .zbc280menubtn { display: block; }
  .zbc280menutg:checked ~ .zbc280topnav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--bg-2);
    padding: 20px;
    border-bottom: 1px solid var(--border);
    gap: 12px;
  }
  .zbc280topnav ul { flex-direction: column; gap: 4px; }
  .zbc280topnav a { padding: 12px 16px; }
  .zbc280topnav .zbc280btnglow { align-self: flex-start; }

  .zbc280cardgrid { grid-template-columns: 1fr 1fr; }
  .zbc280advgrid { grid-template-columns: 1fr; gap: 40px; }
  .zbc280steps { grid-template-columns: 1fr 1fr; }
  .zbc280contactgrid { grid-template-columns: 1fr; }
  .zbc280ctacontent { flex-direction: column; text-align: center; }
  .zbc280databoard { grid-template-columns: 1fr 1fr; }
  .zbc280datamain { grid-row: span 1; }
  .zbc280datamain .zbc280datanum { font-size: 42px; }
}

@media (max-width: 640px) {
  .zbc280section { padding: 60px 0; }
  .zbc280sechead { margin-bottom: 36px; }
  .zbc280hero { min-height: auto; padding: 100px 0 80px; }
  .zbc280herodesc { font-size: 15px; }
  .zbc280herostats {
    grid-template-columns: 1fr 1fr;
    position: relative;
    bottom: auto;
    transform: none;
    margin-top: 40px;
  }
  .zbc280statitem:nth-child(2) { border-right: none; }
  .zbc280statitem:nth-child(-n+2) { border-bottom: 1px solid var(--border); }

  .zbc280cardgrid { grid-template-columns: 1fr; }
  .zbc280steps { grid-template-columns: 1fr; }
  .zbc280formrow { grid-template-columns: 1fr; }
  .zbc280databoard { grid-template-columns: 1fr; }
  .zbc280contactform, .zbc280contactinfo { padding: 24px 20px; }
  .zbc280adzone { padding: 40px 0 10px; }
}