/* =========================================================
   人人视频 官网下载着陆页（响应式）
   主色调：匹配官方蓝 Logo（#007AFF 天蓝 → #003CC8 宝蓝）
   ========================================================= */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: #0c0e16;
  color: #f4f4f8;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 14, 22, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #f4f4f8;
  text-decoration: none;
  font-weight: 800;
  font-size: 18px;
}

.nav-logo {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: #c6c8d4;
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: #fff;
}

.nav-cta {
  display: inline-block;
  padding: 9px 20px;
  border-radius: 10px;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  background: linear-gradient(135deg, #007aff, #003cc8);
  box-shadow: 0 6px 16px rgba(0, 122, 255, 0.35);
  transition: transform 0.16s ease;
}

.nav-cta:active {
  transform: scale(0.96);
}

@media (max-width: 520px) {
  .nav-link { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100vh - 64px);
  min-height: calc(100svh - 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background:
    radial-gradient(120% 110% at 50% -10%, #12244a 0%, #0c1830 42%, #0c0e16 74%);
  padding: 64px 24px 56px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -22%;
  left: 50%;
  transform: translateX(-50%);
  width: 620px;
  height: 620px;
  max-width: 90vw;
  background: radial-gradient(circle, rgba(0, 122, 255, 0.4) 0%, rgba(0, 80, 220, 0.16) 45%, transparent 70%);
  filter: blur(24px);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.logo {
  width: 112px;
  height: 112px;
  border-radius: 26px;
  box-shadow: 0 18px 44px rgba(0, 122, 255, 0.42);
  margin-bottom: 22px;
}

.app-name {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: 2px;
  background: linear-gradient(90deg, #5ec0ff, #007aff 50%, #003cc8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.slogan {
  margin-top: 12px;
  font-size: 26px;
  font-weight: 700;
}

.hero-sub {
  margin-top: 10px;
  color: #9a9aa8;
  font-size: 16px;
}

/* ---------- CTA buttons ---------- */
.hero-actions {
  margin-top: 36px;
  display: flex;
  justify-content: center;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 58px;
  padding: 0 34px;
  border-radius: 16px;
  color: #fff;
  text-decoration: none;
  background: linear-gradient(135deg, #007aff 0%, #003cc8 100%);
  box-shadow: 0 14px 34px rgba(0, 90, 255, 0.5);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  animation: breathe 3.2s ease-in-out infinite;
  -webkit-tap-highlight-color: transparent;
}

.btn-download:active {
  transform: scale(0.96);
}

@keyframes breathe {
  0%, 100% { box-shadow: 0 14px 34px rgba(0, 90, 255, 0.36); }
  50% { box-shadow: 0 16px 46px rgba(0, 122, 255, 0.6); }
}

.btn-download .btn-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.15;
}

.btn-download .btn-copy small {
  font-size: 11px;
  opacity: 0.85;
  letter-spacing: 1.5px;
  font-weight: 600;
}

.btn-download .btn-copy b {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 1px;
}

/* ---------- Hero stats ---------- */
.hero-stats {
  margin-top: 40px;
  display: flex;
  gap: 12px;
  width: 100%;
  max-width: 520px;
  justify-content: center;
}

.stat {
  flex: 1;
  padding: 18px 10px;
  background: rgba(23, 28, 44, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat b {
  font-size: 22px;
  font-weight: 800;
  color: #5ec0ff;
}

.stat span {
  margin-top: 4px;
  font-size: 13px;
  color: #9a9aa8;
}

/* ---------- Sections ---------- */
.page {
  background: linear-gradient(180deg, #0c0e16, #111624);
}

.section {
  padding: 72px 0;
}

.section-title {
  text-align: center;
  font-size: 30px;
  font-weight: 800;
  line-height: 1.4;
}

.section-title span {
  background: linear-gradient(90deg, #007aff, #003cc8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-left: 6px;
}

.section-desc {
  text-align: center;
  margin-top: 10px;
  color: #9a9aa8;
  font-size: 15px;
}

/* ---------- Features ---------- */
.feature-list {
  list-style: none;
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px 22px;
  background: #171c2c;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-item:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 122, 255, 0.4);
}

.feature-icon {
  flex: 0 0 auto;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, #007aff, #003cc8);
  box-shadow: 0 8px 20px rgba(0, 90, 255, 0.3);
}

.feature-item h3 {
  font-size: 18px;
  font-weight: 700;
}

.feature-item p {
  margin-top: 6px;
  font-size: 14px;
  color: #9a9aa8;
}

/* ---------- Reviews ---------- */
.reviews {
  background: linear-gradient(180deg, #111624, #0e111c);
}

.review-list {
  list-style: none;
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.review-card {
  padding: 24px 22px;
  background: #171c2c;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.review-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 122, 255, 0.4);
}

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

.avatar {
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 17px;
  color: #fff;
  background: linear-gradient(135deg, #007aff, #003cc8);
}

.review-name {
  display: block;
  font-size: 15px;
  font-weight: 700;
}

.stars {
  display: inline-flex;
  gap: 1px;
  margin-top: 3px;
}

.review-text {
  margin-top: 14px;
  font-size: 14.5px;
  color: #cfcfd8;
}

/* ---------- CTA section ---------- */
.cta {
  position: relative;
}

.cta-card {
  max-width: 900px;
  text-align: center;
  padding: 56px 32px;
  border-radius: 26px;
  background:
    radial-gradient(120% 140% at 50% 0%, rgba(0, 122, 255, 0.22) 0%, rgba(0, 80, 220, 0.08) 48%, transparent 78%),
    #171c2c;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.cta-logo {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  margin-bottom: 18px;
  box-shadow: 0 10px 26px rgba(0, 122, 255, 0.34);
}

.cta-card h2 {
  font-size: 30px;
  font-weight: 800;
}

.cta-card p {
  margin-top: 10px;
  color: #9a9aa8;
  font-size: 15px;
}

.btn-lg {
  margin-top: 28px;
  padding: 0 48px;
  min-height: 62px;
  font-size: 18px;
}

.cta-note {
  display: block;
  margin-top: 18px;
  font-size: 12.5px;
  color: #6f6f7d;
}

/* ---------- Footer ---------- */
.footer {
  padding: 40px 0 48px;
  text-align: center;
  font-size: 13px;
  background: #0c0e16;
  color: #6f6f7d;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  color: #c6c8d4;
  margin-bottom: 10px;
}

.footer-logo {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.footer .footer-meta {
  margin-top: 6px;
  color: #55555f;
  font-size: 12.5px;
}

.footer-copy {
  margin-top: 14px;
  font-size: 12px;
  color: #4b4b55;
}

/* ---------- Responsive: tablet & mobile ---------- */
@media (max-width: 900px) {
  .review-list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .feature-list { grid-template-columns: 1fr; }

  .app-name { font-size: 36px; }
  .slogan { font-size: 21px; }
  .section-title { font-size: 24px; }
  .cta-card h2 { font-size: 24px; }
  .hero { min-height: auto; padding: 48px 24px 44px; }

  .review-list { grid-template-columns: 1fr; }
}

@media (max-width: 380px) {
  .app-name { font-size: 31px; }
  .stat b { font-size: 19px; }
}