/* ============================================
   炬啸传媒 Giant Voice Media
   风格参考 bytedance.com · 深色科技风
   ============================================ */

:root {
  --bg: #0A0B0D;
  --bg-alt: #101216;
  --bg-card: #14171C;
  --text: #F5F7FA;
  --text-dim: #9AA3AF;
  --text-faint: #6B7280;
  --line: rgba(255, 255, 255, 0.08);
  --grad: linear-gradient(120deg, #3B82F6 0%, #8B5CF6 100%);
  --accent: #4D8DFF;
  --radius: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

a { color: inherit; text-decoration: none; }

.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- 导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 11, 13, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark { flex: none; }

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }

.brand-name { font-size: 18px; font-weight: 700; letter-spacing: 0.5px; }

.brand-en { font-size: 10.5px; letter-spacing: 2.5px; color: var(--text-dim); margin-top: 2px; }

.main-nav { display: flex; gap: 34px; }

.main-nav a {
  font-size: 15px;
  color: var(--text-dim);
  transition: color 0.25s ease;
}

.main-nav a:hover { color: var(--text); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 120px 0 96px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -240px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 620px;
  background: radial-gradient(closest-side, rgba(61, 108, 255, 0.28), rgba(139, 92, 246, 0.12) 55%, transparent 75%);
  pointer-events: none;
}

.hero-tag {
  display: inline-block;
  font-size: 14px;
  color: var(--text-dim);
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  margin-bottom: 28px;
}

.hero-title {
  font-size: clamp(38px, 6.5vw, 72px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -1px;
}

.hero-sub {
  margin-top: 26px;
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--text-dim);
  line-height: 1.8;
}

.hero-actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 30px rgba(75, 130, 246, 0.35);
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

/* 数据条 */
.hero-stats {
  margin-top: 72px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  border-top: 1px solid var(--line);
  padding-top: 44px;
}

.stat-num {
  font-size: clamp(34px, 4.5vw, 52px);
  font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-num span { font-size: 0.5em; margin-left: 2px; }

.stat-label { margin-top: 6px; font-size: 14px; color: var(--text-dim); }

/* ---------- 通用 section ---------- */
.section { padding: 96px 0; }

.section-alt { background: var(--bg-alt); }

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -0.5px;
}

.section-lead {
  margin-top: 16px;
  font-size: 17px;
  color: var(--text-dim);
  max-width: 720px;
}

.section-lead b { color: var(--text); }

/* ---------- 定位 ---------- */
.position-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.position-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.position-card:hover { border-color: rgba(75, 130, 246, 0.5); transform: translateY(-4px); }

.position-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.position-card p { font-size: 15px; color: var(--text-dim); line-height: 1.8; }

/* ---------- 服务 ---------- */
.services-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.service-card:hover { border-color: rgba(139, 92, 246, 0.5); transform: translateY(-4px); }

.service-icon { font-size: 26px; margin-bottom: 14px; }

.service-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }

.service-card p { font-size: 14.5px; color: var(--text-dim); line-height: 1.75; }

/* ---------- 资质条 ---------- */
.badge-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 26px 0;
}

.badge-strip .container {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: center;
  justify-content: center;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.badge-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(75, 130, 246, 0.8);
}

/* ---------- 客户 ---------- */
.clients-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.client-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px 18px;
  text-align: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-dim);
  transition: color 0.25s ease, border-color 0.25s ease;
}

.client-item:hover { color: var(--text); border-color: rgba(255, 255, 255, 0.2); }

/* ---------- 关于 ---------- */
.about-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.about-block h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--accent);
}

.about-block p { font-size: 15px; color: var(--text-dim); line-height: 1.85; }

.info-line { color: var(--text) !important; }

/* ---------- 联系 ---------- */
.contact-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.contact-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.contact-label { font-size: 13px; color: var(--text-faint); margin-bottom: 10px; }

.contact-value { font-size: 17px; font-weight: 600; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px 0 40px;
  background: var(--bg);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 22px;
  align-items: center;
  text-align: center;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-brand .brand-name { font-size: 20px; }

.footer-brand .brand-en { font-size: 11px; letter-spacing: 3px; }

.footer-links { display: flex; gap: 26px; font-size: 14px; color: var(--text-dim); }

.footer-links a:hover { color: var(--text); }

.footer-icp { font-size: 13px; color: var(--text-faint); line-height: 1.9; }

.footer-icp a { color: var(--text-dim); }

.footer-icp a:hover { color: var(--text); }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .main-nav { gap: 22px; }
  .main-nav a { font-size: 14px; }
  .hero { padding: 84px 0 64px; }
  .section { padding: 68px 0; }
  .badge-strip .container { gap: 22px; }
}

/* 滚动渐现 */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible { opacity: 1; transform: none; }