/* QuickQ 站点共享样式：与 index.html / download.html 保持同一套配色与组件规范 */

:root {
  --primary: #6C5CE7;
  --secondary: #00D2FF;
  --accent: #FF6B9D;
  --bg-dark: #0A0A0F;
  --bg-light: #F7F7FA;
  --text-white: #FFFFFF;
  --text-dark: #1A1A1A;
  --text-muted: #A0A0B0;
  --card-bg-dark: rgba(255, 255, 255, 0.04);
  --card-border-dark: rgba(255, 255, 255, 0.08);
  --radius-card: 16px;
  --radius-btn: 12px;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --transition: all 0.3s ease;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  padding-left: 22px;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border-dark);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  padding: 0;
}

.nav-menu a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 15px;
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-white);
}

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

.btn-login {
  padding: 8px 16px;
  border: 1px solid var(--card-border-dark);
  border-radius: var(--radius-btn);
  color: var(--text-white);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.btn-login:hover {
  border-color: var(--primary);
  background: rgba(108, 92, 231, 0.1);
}

.btn-primary {
  display: inline-block;
  padding: 14px 30px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-btn);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 16px;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(108, 92, 231, 0.4);
}

.btn-secondary {
  display: inline-block;
  padding: 14px 30px;
  border: 1px solid var(--card-border-dark);
  border-radius: var(--radius-btn);
  color: var(--text-white);
  font-weight: 600;
  font-size: 16px;
  transition: var(--transition);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--text-white);
}

.btn-download-sm {
  padding: 9px 18px;
  font-size: 14px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--card-border-dark);
  border-radius: 10px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--text-white);
  border-radius: 2px;
}

/* ===== 页头 ===== */
.page-hero {
  padding: 148px 0 56px;
  text-align: center;
  background: radial-gradient(ellipse at top, rgba(108, 92, 231, 0.18), transparent 65%);
  border-bottom: 1px solid var(--card-border-dark);
}

.page-hero h1 {
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
}

.page-hero p {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 720px;
  margin: 0 auto;
}

.page-meta-line {
  margin-top: 18px;
  color: var(--text-muted);
  font-size: 14px;
}

/* ===== 内容区 ===== */
.section {
  padding: 64px 0;
}

.section + .section {
  border-top: 1px solid var(--card-border-dark);
}

.section-title {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-muted);
  margin-bottom: 34px;
  font-size: 16px;
}

.card {
  background: var(--card-bg-dark);
  border: 1px solid var(--card-border-dark);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(108, 92, 231, 0.5);
}

.card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
}

.card p,
.card li {
  color: var(--text-muted);
  line-height: 1.75;
}

.card li {
  margin-bottom: 8px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.step-list {
  list-style: none;
  padding: 0;
  counter-reset: step;
}

.step-list li {
  position: relative;
  padding-left: 42px;
  margin-bottom: 16px;
  counter-increment: step;
  color: var(--text-muted);
}

.step-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.note {
  margin-top: 26px;
  padding: 18px 22px;
  border-left: 3px solid var(--primary);
  background: rgba(108, 92, 231, 0.08);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  color: var(--text-muted);
  font-size: 15px;
}

/* ===== 页脚 ===== */
.footer {
  border-top: 1px solid var(--card-border-dark);
  padding: 54px 0 28px;
  background: rgba(255, 255, 255, 0.02);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 36px;
}

.footer-about p {
  color: var(--text-muted);
  font-size: 14px;
  margin: 16px 0;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

.footer-col li {
  margin-bottom: 9px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 14px;
  transition: var(--transition);
}

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

.page-meta {
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--card-border-dark);
  color: var(--text-muted);
  font-size: 13px;
}

.footer-bottom {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 13px;
}

.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 900px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--card-border-dark);
    padding: 8px 24px 18px;
    display: none;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu li {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid var(--card-border-dark);
  }

  .btn-login,
  .btn-download-sm {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== 数据表格（结构化对比，便于用户与 AI 摘要直接读取） ===== */
.data-table-wrap {
  overflow-x: auto;
  margin-top: 18px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.data-table caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 10px;
  font-size: 14px;
  color: var(--text-muted);
}

.data-table th,
.data-table td {
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 12px 14px;
  text-align: left;
}

.data-table th {
  background: rgba(108, 92, 231, 0.18);
  color: var(--text-white);
  font-weight: 700;
}

.data-table td {
  color: var(--text-muted);
}

.table-note {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-muted);
}

@media (prefers-color-scheme: light) {
  .data-table th {
    background: rgba(108, 92, 231, 0.1);
    color: var(--text-dark);
  }

  .data-table th,
  .data-table td {
    border-color: rgba(0, 0, 0, 0.1);
  }

  .data-table td {
    color: #555;
  }
}