/* ===== QuickQ 全局样式 ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --primary: #0066ff;
  --primary-dark: #0052cc;
  --primary-light: #3388ff;
  --accent: #00d4aa;
  --bg-dark: #0a0e1a;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --text-primary: #ffffff;
  --text-secondary: #b0b8c8;
  --text-muted: #6b7280;
  --border: #1e293b;
  --gradient-hero: linear-gradient(135deg, #0066ff 0%, #00d4aa 100%);
  --gradient-card: linear-gradient(145deg, #111827 0%, #1a2332 100%);
  --shadow-lg: 0 25px 60px rgba(0, 102, 255, 0.15);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

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

/* ===== 粒子背景 ===== */
.particles-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.15;
  animation: floatUp linear infinite;
}

@keyframes floatUp {
  0% {
    transform: translateY(100vh) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 0.2;
  }
  90% {
    opacity: 0.05;
  }
  100% {
    transform: translateY(-10vh) scale(1);
    opacity: 0;
  }
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 14, 26, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-hero);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  color: #fff;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-hero);
  border-radius: 1px;
  transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-btn {
  background: var(--gradient-hero);
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600 !important;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 102, 255, 0.4);
}

.nav-btn::after {
  display: none !important;
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-hero);
  color: #fff;
  box-shadow: 0 8px 30px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 102, 255, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(0, 102, 255, 0.1);
}

.btn-lg {
  padding: 18px 42px;
  font-size: 18px;
}

.btn-sm {
  padding: 10px 22px;
  font-size: 14px;
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 16px;
  font-size: 14px;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 12px;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* ===== 页面标题区 ===== */
.page-hero {
  padding: 160px 0 80px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.page-hero .badge {
  display: inline-block;
  background: rgba(0, 102, 255, 0.15);
  color: var(--primary-light);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px solid rgba(0, 102, 255, 0.2);
}

.page-hero h1 {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}

.page-hero h1 .gradient-text {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 320px;
    height: 100vh;
    background: var(--bg-card);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    transition: var(--transition);
    border-left: 1px solid var(--border);
    z-index: 1000;
  }

  .nav-links.active {
    right: 0;
  }

  .page-hero h1 {
    font-size: 32px;
  }

  .page-hero p {
    font-size: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .page-hero {
    padding: 140px 0 60px;
  }

  .page-hero h1 {
    font-size: 26px;
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 15px;
  }
}