/* ============================================
   Quickq 官网 - Node.js 风格深色极简设计
   ============================================ */

/* ---- 变量 ---- */
:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --text2: #8b949e;
  --green: #3fb950;
  --green-dim: #238636;
  --green-light: #56d364;
  --blue: #58a6ff;
  --radius: 8px;
  --max-w: 1200px;
  --nav-h: 72px;
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--green); text-decoration: none; transition: color .2s; }
a:hover { color: var(--green-light); }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ---- 容器 ---- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- 导航 ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(13, 17, 23, .88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  height: var(--nav-h);
  gap: 32px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-brand:hover { color: #fff; }
.nav-logo-wrap {
  width: 36px;
  height: 36px;
  background: var(--green);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 900;
  color: #fff;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: 6px;
  font-size: .9rem;
  color: var(--text2);
  transition: color .2s, background .2s;
}
.nav-links a:hover {
  color: #fff;
  background: var(--bg3);
}
.nav-cta {
  background: var(--green-dim) !important;
  color: #fff !important;
  font-weight: 600;
}
.nav-cta:hover {
  background: var(--green) !important;
  color: #fff !important;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: .3s;
}

/* ---- 页面头部 ---- */
.page-hd {
  padding: calc(var(--nav-h) + 80px) 0 60px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #0d1117 0%, var(--bg) 100%);
}
.page-hd h1 { font-size: 2.8rem; font-weight: 800; color: #fff; margin-bottom: 12px; }
.page-hd .g { color: var(--green); }
.page-hd p { color: var(--text2); font-size: 1.1rem; margin-bottom: 20px; }
.crumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: .875rem;
  color: var(--text2);
}
.crumb a { color: var(--text2); }
.crumb a:hover { color: var(--green); }
.crumb span { color: var(--green); }

/* ---- Hero ---- */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 40px) 0 80px;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(63,185,80,.12) 0%, transparent 70%), var(--bg);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(63,185,80,.12);
  border: 1px solid rgba(63,185,80,.3);
  color: var(--green);
  padding: 4px 14px;
  border-radius: 50px;
  font-size: .8rem;
  margin-bottom: 24px;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.3); }
}
.hero h1 {
  font-size: 3.6rem;
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero h1 .g { color: var(--green); }
.hero-sub {
  font-size: 1.15rem;
  color: var(--text2);
  margin-bottom: 40px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .2s;
  text-decoration: none;
}
.btn-pri {
  background: var(--green);
  color: #fff;
}
.btn-pri:hover { background: var(--green-light); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(63,185,80,.35); }
.btn-sec {
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-sec:hover { background: var(--bg2); color: #fff; border-color: var(--text2); }
.btn-lg { padding: 14px 36px; font-size: 1.05rem; }

.hero-stats {
  display: flex;
  gap: 40px;
}
.stat-item { display: flex; flex-direction: column; gap: 4px; }
.stat-n { font-size: 1.8rem; font-weight: 800; color: var(--green); }
.stat-l { font-size: .8rem; color: var(--text2); }

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-logo-wrap {
  width: 280px;
  height: 280px;
  background: linear-gradient(135deg, rgba(63,185,80,.2), rgba(88,166,255,.1));
  border-radius: 48px;
  border: 1px solid rgba(63,185,80,.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  animation: float 4s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
.hero-logo-wrap .qbig {
  font-size: 7rem;
  font-weight: 900;
  color: var(--green);
  line-height: 1;
}
.hero-logo-wrap .qsub {
  font-size: 1.1rem;
  color: var(--text2);
  font-weight: 500;
}

/* ---- 区块 ---- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg2); }
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.tag {
  display: inline-block;
  background: rgba(63,185,80,.12);
  border: 1px solid rgba(63,185,80,.3);
  color: var(--green);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: .8rem;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.section h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.section-sub { color: var(--text2); font-size: 1.05rem; }

/* ---- 功能卡片 ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}
.feature-card:hover {
  border-color: var(--green-dim);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(63,185,80,.1);
}
.feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(63,185,80,.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.feature-card p { color: var(--text2); font-size: .925rem; line-height: 1.7; }

/* ---- 下载卡片 ---- */
.downloads-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.download-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}
.download-card:hover {
  border-color: var(--green-dim);
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(63,185,80,.1);
}
.download-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}
.dl-icon {
  width: 52px;
  height: 52px;
  background: rgba(63,185,80,.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}
.dl-info h3 { font-size: 1.15rem; font-weight: 700; color: #fff; }
.dl-info p { font-size: .8rem; color: var(--text2); }
.dl-tag {
  display: inline-block;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
  padding: 2px 10px;
  border-radius: 50px;
  font-size: .7rem;
  margin-top: 4px;
}
.download-card p { color: var(--text2); font-size: .875rem; margin-bottom: 20px; }

/* ---- 内容页卡片 ---- */
.con-section { display: flex; flex-direction: column; gap: 24px; max-width: 860px; margin: 0 auto; }
.con-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}
.con-card h2 { font-size: 1.3rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.con-card p { color: var(--text2); line-height: 1.8; margin-bottom: 12px; }
.con-card ul { display: flex; flex-direction: column; gap: 10px; }
.con-card li {
  color: var(--text2);
  padding-left: 20px;
  position: relative;
}
.con-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}
.info-box {
  padding: 16px 20px;
  border-radius: 8px;
  font-size: .9rem;
  margin-top: 16px;
  border-left: 3px solid;
}
.info-box.green {
  background: rgba(63,185,80,.08);
  border-color: var(--green);
  color: var(--text2);
}
.info-box.blue {
  background: rgba(88,166,255,.08);
  border-color: var(--blue);
  color: var(--text2);
}
.tip-box {
  background: rgba(88,166,255,.08);
  border: 1px solid rgba(88,166,255,.2);
  border-radius: 8px;
  padding: 20px 24px;
  margin-top: 20px;
}
.tip-box h4 { color: var(--blue); font-size: 1rem; margin-bottom: 8px; }
.tip-box p { color: var(--text2); font-size: .9rem; }

/* ---- 步骤 ---- */
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: flex;
  gap: 28px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.step:last-child { border-bottom: none; }
.step-n {
  width: 48px;
  height: 48px;
  background: var(--green-dim);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}
.step h3 { font-size: 1.15rem; font-weight: 700; color: #fff; margin-bottom: 6px; }
.step p { color: var(--text2); font-size: .925rem; }

/* ---- FAQ ---- */
.faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.faq-item summary {
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.4rem; color: var(--green); font-weight: 400; transition: transform .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item[open] summary { color: var(--green); }
.faq-body { padding: 0 24px 20px; color: var(--text2); font-size: .925rem; border-top: 1px solid var(--border); padding-top: 16px; }

/* ---- 对比表 ---- */
.tbl-wrap { overflow-x: auto; border-radius: 12px; border: 1px solid var(--border); }
.tbl { width: 100%; border-collapse: collapse; }
.tbl th {
  background: var(--bg3);
  padding: 14px 20px;
  text-align: left;
  font-size: .9rem;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid var(--border);
}
.tbl th.c { text-align: center; }
.tbl td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text2);
  font-size: .9rem;
}
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: var(--bg2); }
.tbl td.c { text-align: center; }
.yes { color: var(--green); font-weight: 700; font-size: 1rem; }
.no { color: var(--text2); }

/* ---- CTA ---- */
.cta {
  padding: 80px 0;
  text-align: center;
  background: radial-gradient(ellipse 70% 50% at 50% 50%, rgba(63,185,80,.1) 0%, transparent 70%);
}
.cta h2 { font-size: 2rem; font-weight: 800; color: #fff; margin-bottom: 12px; }
.cta p { color: var(--text2); margin-bottom: 32px; }
.btn-w {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 40px;
  background: var(--green);
  color: #fff;
  border-radius: var(--radius);
  font-size: 1.05rem;
  font-weight: 700;
  transition: all .2s;
}
.btn-w:hover { background: var(--green-light); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(63,185,80,.4); }

/* ---- Footer ---- */
.footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}
.footer-brand .flogo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.flogo {
  width: 32px;
  height: 32px;
  background: var(--green);
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 900;
  color: #fff;
}
.footer-brand p { color: var(--text2); font-size: .875rem; }
.footer-col h4 { color: #fff; font-size: .9rem; font-weight: 700; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: var(--text2); font-size: .875rem; }
.footer-col a:hover { color: var(--green); }
.footer-bottom {
  padding: 24px 0;
  text-align: center;
  color: var(--text2);
  font-size: .8rem;
}

/* ---- 返回顶部 ---- */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--text);
  cursor: pointer;
  opacity: 0;
  transition: opacity .3s, background .2s;
  z-index: 50;
}
.back-top.show { opacity: 1; }
.back-top:hover { background: var(--green); color: #fff; border-color: var(--green); }

/* ---- 弹窗 ---- */
.popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
}
.popup-overlay.show { opacity: 1; pointer-events: all; }
.popup {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  transform: scale(.9);
  transition: transform .25s;
}
.popup-overlay.show .popup { transform: scale(1); }
.popup-ic {
  width: 64px;
  height: 64px;
  background: rgba(63,185,80,.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 20px;
}
.popup h3 { font-size: 1.3rem; font-weight: 800; color: #fff; margin-bottom: 8px; }
.popup p { color: var(--text2); font-size: .925rem; margin-bottom: 28px; }
.popup-btns { display: flex; gap: 12px; justify-content: center; }
.popup .btn { min-width: 120px; justify-content: center; }

/* ---- 滚动动画 ---- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-visual { display: none; }
  .hero h1 { font-size: 2.8rem; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .downloads-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    gap: 4px;
  }
  .nav-links.open a { padding: 10px 16px; }
  .hero h1 { font-size: 2rem; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .page-hd h1 { font-size: 2rem; }
  .section h2 { font-size: 1.7rem; }
}