/* ===== LuyA 撸呀 官网样式 ===== */
:root {
  --bg: #f5f5f7;
  --card: #ffffff;
  --ink: #171719;
  --muted: #73747b;
  --line: #e5e5ea;
  --primary: #007aff;
  --primary-dark: #0056cc;
  --accent: #34c759;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
  --max-w: 1100px;
}

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

html { scroll-behavior: smooth; }

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

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ===== 导航栏 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245,245,247,0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.navbar-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar-brand .logo {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--primary), #5ac8fa);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px; font-weight: 800;
}
.navbar-links { display: flex; gap: 28px; align-items: center; }
.navbar-links a {
  color: var(--ink);
  font-size: 15px;
  font-weight: 500;
  opacity: 0.85;
  transition: opacity 0.2s;
}
.navbar-links a:hover { opacity: 1; text-decoration: none; }
.navbar-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 980px;
  font-size: 14px;
  font-weight: 600;
  opacity: 1 !important;
  transition: background 0.2s;
}
.navbar-cta:hover { background: var(--primary-dark); }

/* ===== Hero 区 ===== */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 24px 60px;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  background: rgba(0,122,255,0.1);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 980px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero h1 .gradient {
  background: linear-gradient(135deg, var(--primary), #5ac8fa, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 20px;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto 36px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 980px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; }
.btn-secondary {
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-secondary:hover { border-color: var(--muted); text-decoration: none; }

/* ===== 手机预览 ===== */
.hero-preview {
  margin-top: 60px;
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
.phone-mockup {
  width: 280px;
  height: 580px;
  background: var(--card);
  border-radius: 40px;
  box-shadow: var(--shadow-lg);
  border: 8px solid #171719;
  overflow: hidden;
  position: relative;
}
.phone-mockup .phone-notch {
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 120px; height: 28px;
  background: #171719;
  border-radius: 0 0 18px 18px;
  z-index: 2;
}
.phone-mockup .phone-screen {
  width: 100%; height: 100%;
  background: var(--bg);
  padding: 40px 16px 16px;
  overflow: hidden;
}
.phone-screen .mock-card {
  background: var(--card);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
}
.phone-screen .mock-line {
  height: 10px;
  background: var(--line);
  border-radius: 5px;
  margin-bottom: 8px;
}
.phone-screen .mock-line.short { width: 60%; }
.phone-screen .mock-line.medium { width: 80%; }
.phone-screen .mock-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), #5ac8fa);
  border-radius: 10px;
  margin-bottom: 10px;
}

/* ===== 功能区 ===== */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 24px;
}
.section-title {
  text-align: center;
  margin-bottom: 56px;
}
.section-title h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.section-title p {
  font-size: 18px;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
}
.feature-icon.blue { background: rgba(0,122,255,0.12); }
.feature-icon.green { background: rgba(52,199,89,0.12); }
.feature-icon.orange { background: rgba(255,149,0,0.12); }
.feature-icon.purple { background: rgba(175,82,222,0.12); }
.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
}

/* ===== 数据亮点 ===== */
.stats {
  background: var(--card);
  border-radius: var(--radius);
  padding: 48px 32px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  text-align: center;
}
.stat-item .stat-num {
  font-size: 40px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
}
.stat-item .stat-label {
  font-size: 14px;
  color: var(--muted);
  margin-top: 6px;
}

/* ===== CTA 区 ===== */
.cta-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
}
.cta-box {
  background: linear-gradient(135deg, var(--primary), #5ac8fa);
  border-radius: 24px;
  padding: 64px 40px;
  color: #fff;
}
.cta-box h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-box p {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 32px;
}
.cta-box .btn {
  background: #fff;
  color: var(--primary);
}
.cta-box .btn:hover { background: rgba(255,255,255,0.9); }

/* ===== 页脚 ===== */
.footer {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 48px 24px 32px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--muted);
  margin-top: 12px;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--ink);
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 10px;
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--muted);
}
.footer-beian {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-beian a {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
}
.footer-beian a:hover { color: var(--primary); }

/* ===== 内容页（隐私政策/协议/关于） ===== */
.content-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}
.content-page h1 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.content-page .meta {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.content-page h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 36px 0 14px;
}
.content-page h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 24px 0 10px;
}
.content-page p {
  font-size: 15px;
  color: var(--ink);
  line-height: 1.8;
  margin-bottom: 14px;
}
.content-page ul, .content-page ol {
  margin: 12px 0 16px 24px;
}
.content-page li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  margin-bottom: 6px;
}
.content-page .highlight {
  background: rgba(0,122,255,0.06);
  border-left: 3px solid var(--primary);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 20px 0;
  font-size: 14px;
  color: var(--ink);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 17px; }
  .section-title h2 { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .navbar-links { gap: 16px; }
  .navbar-links a:not(.navbar-cta) { display: none; }
  .phone-mockup { width: 240px; height: 500px; }
  .cta-box { padding: 40px 24px; }
  .cta-box h2 { font-size: 28px; }
}

/* 导航栏品牌链接悬停无下划线 */
.navbar-brand:hover { text-decoration: none; }