/* ============================================
   过了吗 · 官网（PC + 移动端）
   ============================================ */
:root {
  --primary: #2f6bff;
  --primary-dark: #1e4fd4;
  --primary-light: #5488ff;
  --primary-glow: rgba(47, 107, 255, 0.35);
  --accent: #16a34a;
  --accent-soft: #e9faf1;
  --text: #171d2b;
  --text-secondary: #606878;
  --text-muted: #949cb0;
  --bg: #f7f9fc;
  --bg-white: #ffffff;
  --border: #e9eef6;
  --shadow: 0 20px 60px rgba(47, 107, 255, 0.12);
  --shadow-sm: 0 8px 30px rgba(15, 23, 42, 0.06);
  --radius: 20px;
  --radius-lg: 28px;
  --nav-height: 72px;
  --nav-height-mobile: 60px;
  --max-width: 1200px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: min(100% - 48px, var(--max-width));
  margin: 0 auto;
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.nav-brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

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

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
  transition: width var(--transition);
}

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

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

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

.nav-cta-desktop {
  flex-shrink: 0;
}

.nav-links-cta {
  display: none;
}

/* 汉堡菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: 10px;
  -webkit-tap-highlight-color: transparent;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav.scrolled .nav-toggle-bar {
  background: var(--text);
}

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--nav-height-mobile);
  background: rgba(15, 23, 42, 0.45);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.nav-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

body.menu-open {
  overflow: hidden;
}

.btn-block {
  width: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  box-shadow: 0 8px 24px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--primary-glow);
}

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

.btn-outline:hover {
  background: rgba(47, 107, 255, 0.06);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(47, 107, 255, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(84, 136, 255, 0.1) 0%, transparent 50%),
    linear-gradient(180deg, #f0f4ff 0%, var(--bg) 100%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(47, 107, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 107, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 20%, transparent 70%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orbFloat 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  background: rgba(47, 107, 255, 0.2);
  top: 10%;
  right: 10%;
}

.hero-orb-2 {
  width: 300px;
  height: 300px;
  background: rgba(84, 136, 255, 0.15);
  bottom: 20%;
  left: 5%;
  animation-delay: -4s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -30px) scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 80px 0 100px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(47, 107, 255, 0.08);
  border: 1px solid rgba(47, 107, 255, 0.15);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
}

.hero-badge .pulse {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
}

.hero-stat .num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.hero-stat .label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Phone mockup */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 420px;
}

.hero-tags {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.hero-tags .floating-card {
  pointer-events: auto;
}

.phone-frame {
  position: relative;
  z-index: 2;
  width: 280px;
  padding: 12px;
  background: linear-gradient(145deg, #1a1a2e 0%, #2d2d44 100%);
  border-radius: 40px;
  box-shadow:
    0 40px 80px rgba(15, 23, 42, 0.25),
    0 0 0 1px rgba(255, 255, 255, 0.1) inset;
  animation: phoneFloat 6s ease-in-out infinite;
}

.phone-frame::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 24px;
  background: #1a1a2e;
  border-radius: 12px;
  z-index: 2;
}

.phone-screen {
  border-radius: 32px;
  overflow: hidden;
  background: #fff;
}

.phone-screen img {
  width: 100%;
  height: auto;
  display: block;
}

.phone-glow {
  position: absolute;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  z-index: -1;
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes phoneFloat {
  0%, 100% { transform: translateY(0) rotate(-1deg); }
  50% { transform: translateY(-16px) rotate(1deg); }
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

.floating-card {
  position: absolute;
  background: var(--bg-white);
  border-radius: 16px;
  padding: 14px 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  animation: cardFloat 5s ease-in-out infinite;
}

.floating-card-1 {
  top: 15%;
  left: -20px;
  animation-delay: 0s;
}

.floating-card-2 {
  bottom: 25%;
  right: -30px;
  animation-delay: -2.5s;
}

.floating-card .icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
}

.floating-card .icon-wrap.blue {
  background: rgba(47, 107, 255, 0.1);
  color: var(--primary);
}

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---- Section common ---- */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(47, 107, 255, 0.08);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(32px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---- Advantages ---- */
.advantages {
  background: var(--bg-white);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.advantage-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(47, 107, 255, 0.2);
}

.advantage-card:hover::before {
  transform: scaleX(1);
}

.advantage-card.featured {
  grid-column: span 1;
  background: linear-gradient(135deg, rgba(47, 107, 255, 0.06) 0%, rgba(84, 136, 255, 0.03) 100%);
  border-color: rgba(47, 107, 255, 0.15);
}

.advantage-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(47, 107, 255, 0.1);
  color: var(--primary);
  margin-bottom: 20px;
  transition: transform var(--transition);
}

.advantage-card:hover .advantage-icon {
  transform: scale(1.08) rotate(-3deg);
}

.advantage-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}

.advantage-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.advantage-card .tag {
  display: inline-block;
  margin-top: 14px;
  padding: 4px 10px;
  background: rgba(47, 107, 255, 0.08);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
}

/* ---- Product / Screenshots ---- */
.product {
  background: linear-gradient(180deg, var(--bg) 0%, #eef2ff 100%);
}

.product-showcase {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: start;
}

.product-tabs {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.product-tab {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-white);
  border: 2px solid transparent;
  border-radius: 16px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
}

.product-tab:hover {
  border-color: var(--border);
}

.product-tab.active {
  border-color: var(--primary);
  background: rgba(47, 107, 255, 0.04);
  box-shadow: var(--shadow-sm);
}

.product-tab .tab-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text-secondary);
  transition: all var(--transition);
  flex-shrink: 0;
}

.product-tab.active .tab-icon {
  background: var(--primary);
  color: #fff;
}

.product-tab h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 2px;
}

.product-tab p {
  font-size: 12px;
  color: var(--text-muted);
}

.product-preview {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 560px;
}

.preview-phone {
  width: 300px;
  padding: 14px;
  background: linear-gradient(145deg, #1a1a2e, #2d2d44);
  border-radius: 44px;
  box-shadow: 0 40px 80px rgba(15, 23, 42, 0.2);
}

.preview-screen {
  border-radius: 34px;
  overflow: hidden;
  position: relative;
}

.preview-screen img {
  width: 100%;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.preview-screen img.fade-out {
  opacity: 0;
  transform: scale(0.96);
}

.preview-info {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-white);
  padding: 16px 28px;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  min-width: 280px;
  transition: opacity 0.4s ease;
}

.preview-info h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.preview-info p {
  font-size: 13px;
  color: var(--text-secondary);
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 64px;
}

.screenshot-thumb {
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  border: 3px solid transparent;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}

.screenshot-thumb:hover,
.screenshot-thumb.active {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.screenshot-thumb img {
  width: 100%;
  aspect-ratio: 9/19.5;
  object-fit: cover;
  object-position: top;
}

/* ---- About ---- */
.about {
  background: var(--bg-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-content h3 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 20px;
}

.about-content p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg);
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
}

.about-feature i {
  color: var(--primary);
  flex-shrink: 0;
}

.about-visual {
  position: relative;
}

.about-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -30%;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.about-card h4 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
  position: relative;
}

.about-card ul {
  list-style: none;
  position: relative;
}

.about-card li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.6;
  opacity: 0.95;
}

.about-card li i {
  flex-shrink: 0;
  margin-top: 3px;
}

/* ---- CTA ---- */
.cta {
  padding: 80px 0;
}

.cta-box {
  background: linear-gradient(135deg, var(--primary) 0%, #1a4fd9 100%);
  border-radius: var(--radius-lg);
  padding: 64px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(255,255,255,0.08) 0%, transparent 40%);
}

.cta-box h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
}

.cta-box p {
  font-size: 17px;
  opacity: 0.9;
  margin-bottom: 32px;
  position: relative;
}

.cta-box .btn {
  position: relative;
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.cta-box .btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

/* ---- Contact / WeChat ---- */
.contact-box {
  max-width: 640px;
  margin: 0 auto;
}

.wechat-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 24px 28px;
  margin-bottom: 20px;
  position: relative;
  flex-wrap: wrap;
  justify-content: center;
}

.wechat-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.wechat-icon svg {
  width: 28px;
  height: 28px;
  color: #fff;
}

.wechat-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  flex: 1;
  min-width: 140px;
}

.wechat-label {
  font-size: 13px;
  opacity: 0.8;
  margin-bottom: 4px;
}

.wechat-id {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 0.06em;
  font-family: "SF Mono", "Menlo", monospace;
}

.btn-copy {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border: none;
  cursor: pointer;
}

.btn-copy.copied {
  background: #e9faf1;
  color: var(--accent);
}

.contact-tip {
  font-size: 14px;
  opacity: 0.75;
  position: relative;
  margin-bottom: 0 !important;
}

/* ---- Footer ---- */
.footer {
  background: #0f172a;
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  max-width: 280px;
}

.footer h5 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

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

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-beian {
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition);
}

.footer-beian:hover {
  color: rgba(255, 255, 255, 0.9);
}

/* ---- Animations (AOS overrides) ---- */
[data-aos] {
  pointer-events: none;
}
[data-aos].aos-animate {
  pointer-events: auto;
}

/* ---- Responsive ---- */

/* 平板 */
@media (max-width: 1024px) {
  .section {
    padding: 72px 0;
  }

  .section-header {
    margin-bottom: 48px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 48px 0 72px;
    gap: 40px;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
    font-size: 16px;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
    gap: 28px;
  }

  .hero-visual {
    order: -1;
    flex-direction: column;
    min-height: auto;
    gap: 16px;
    padding: 8px 0 4px;
    width: 100%;
  }

  .phone-glow {
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    height: 280px;
  }

  .hero-tags {
    position: static;
    display: flex;
    flex-direction: row;
    gap: 12px;
    width: 100%;
    max-width: 400px;
    pointer-events: auto;
    z-index: 4;
  }

  .hero-tags .floating-card {
    flex: 1;
    position: static;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    bottom: auto !important;
    animation: none;
    justify-content: center;
    white-space: normal;
    min-width: 0;
  }

  .floating-card-1,
  .floating-card-2 {
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
  }

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

  .product-showcase {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .product-preview {
    min-height: auto;
    padding-bottom: 48px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .screenshot-grid {
    grid-template-columns: repeat(5, minmax(100px, 1fr));
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
  }

  .screenshot-thumb {
    scroll-snap-align: start;
    min-width: 100px;
  }
}

/* 手机 */
@media (max-width: 768px) {
  :root {
    --nav-height: var(--nav-height-mobile);
  }

  html {
    scroll-padding-top: calc(var(--nav-height-mobile) + 8px);
  }

  .container {
    width: min(100% - 32px, var(--max-width));
  }

  .nav {
    height: var(--nav-height-mobile);
  }

  .nav-brand {
    font-size: 17px;
    gap: 10px;
  }

  .nav-brand img {
    width: 34px;
    height: 34px;
  }

  .nav-cta-desktop {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-overlay {
    display: block;
    top: var(--nav-height-mobile);
  }

  /* 移动端侧滑菜单 */
  .nav-links {
    position: fixed;
    top: var(--nav-height-mobile);
    right: 0;
    width: min(280px, 85vw);
    height: calc(100vh - var(--nav-height-mobile));
    height: calc(100dvh - var(--nav-height-mobile));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 20px 20px calc(20px + env(safe-area-inset-bottom));
    background: var(--bg-white);
    box-shadow: -8px 0 32px rgba(15, 23, 42, 0.12);
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 999;
    overflow-y: auto;
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-links li {
    border-bottom: 1px solid var(--border);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links a {
    display: block;
    padding: 16px 4px;
    font-size: 16px;
  }

  .nav-links a::after {
    display: none;
  }

  .nav-links-cta {
    display: block;
    margin-top: 16px;
    border-bottom: none !important;
    padding-top: 8px;
  }

  .nav-toggle.open .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.open .nav-toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.open .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .btn {
    padding: 11px 22px;
    font-size: 14px;
  }

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

  .hero {
    min-height: auto;
  }

  .hero-content {
    padding: 32px 0 56px;
  }

  .hero-badge {
    font-size: 12px;
    margin-bottom: 16px;
  }

  .hero-title {
    font-size: clamp(28px, 8vw, 36px);
    margin-bottom: 16px;
  }

  .hero-desc {
    font-size: 15px;
    margin-bottom: 28px;
    line-height: 1.75;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-bottom: 32px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-stats {
    gap: 20px;
    flex-wrap: wrap;
  }

  .hero-stat {
    flex: 1;
    min-width: 80px;
  }

  .hero-stat .num {
    font-size: 26px;
  }

  .phone-frame {
    width: min(240px, 72vw);
    padding: 10px;
    border-radius: 32px;
  }

  .phone-frame::before {
    width: 64px;
    height: 20px;
    top: 14px;
  }

  .phone-screen {
    border-radius: 26px;
  }

  .hero-tags {
    max-width: 340px;
    gap: 10px;
  }

  .hero-tags .floating-card {
    padding: 12px 10px;
    font-size: 12px;
    gap: 8px;
    text-align: center;
  }

  .hero-tags .floating-card span {
    line-height: 1.3;
  }

  .floating-card .icon-wrap {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
  }

  .section {
    padding: 56px 0;
  }

  .section-header {
    margin-bottom: 36px;
  }

  .section-title {
    font-size: clamp(24px, 6vw, 32px);
  }

  .section-desc {
    font-size: 15px;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .advantage-card {
    padding: 24px 20px;
  }

  .advantage-card h3 {
    font-size: 16px;
  }

  .product-tabs {
    flex-direction: row;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: 10px;
    padding-bottom: 4px;
    margin: 0 -4px;
    scrollbar-width: none;
  }

  .product-tabs::-webkit-scrollbar {
    display: none;
  }

  .product-tab {
    min-width: 148px;
    flex-shrink: 0;
    scroll-snap-align: start;
    padding: 14px 16px;
  }

  .product-tab .tab-icon {
    width: 38px;
    height: 38px;
  }

  .product-tab h4 {
    font-size: 14px;
  }

  .preview-phone {
    width: min(260px, 78vw);
    padding: 12px;
    border-radius: 36px;
  }

  .preview-screen {
    border-radius: 28px;
  }

  .preview-info {
    position: static;
    transform: none;
    margin-top: 20px;
    min-width: auto;
    width: 100%;
    padding: 14px 18px;
  }

  .product-preview {
    flex-direction: column;
    padding-bottom: 0;
  }

  .screenshot-grid {
    grid-template-columns: repeat(5, minmax(88px, 1fr));
    gap: 10px;
    margin-top: 40px;
  }

  .screenshot-thumb {
    min-width: 88px;
    border-radius: 12px;
    border-width: 2px;
  }

  .about-content h3 {
    font-size: 22px;
  }

  .about-content p {
    font-size: 15px;
  }

  .about-features {
    grid-template-columns: 1fr;
  }

  .about-card {
    padding: 32px 24px;
  }

  .about-card h4 {
    font-size: 18px;
  }

  .about-card li {
    font-size: 14px;
  }

  .cta {
    padding: 56px 0;
  }

  .cta-box {
    padding: 36px 20px;
    border-radius: 20px;
  }

  .cta-box h2 {
    font-size: clamp(22px, 5.5vw, 28px);
    line-height: 1.35;
  }

  .cta-box p {
    font-size: 15px;
    margin-bottom: 24px;
  }

  .wechat-card {
    flex-direction: column;
    text-align: center;
    padding: 20px;
    gap: 16px;
  }

  .wechat-info {
    align-items: center;
  }

  .wechat-id {
    font-size: 24px;
  }

  .btn-copy {
    width: 100%;
  }

  .contact-tip {
    font-size: 13px;
    line-height: 1.6;
  }

  .footer {
    padding: 48px 0 calc(24px + env(safe-area-inset-bottom));
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 32px;
  }

  .footer-desc {
    max-width: none;
  }

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

/* 小屏手机 */
@media (max-width: 380px) {
  .hero-stats {
    justify-content: space-between;
  }

  .hero-stat .num {
    font-size: 22px;
  }

  .hero-stat .label {
    font-size: 11px;
  }

  .product-tab {
    min-width: 130px;
  }
}

/* 触控设备：减少 hover 依赖 */
@media (hover: none) {
  .advantage-card:hover {
    transform: none;
    box-shadow: none;
  }

  .advantage-card:active {
    transform: scale(0.98);
  }

  .btn-primary:hover,
  .btn-outline:hover {
    transform: none;
  }
}