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

figure {
  margin: 0;
}

:root {
  --wechat-green: #07c160;
  --wechat-green-dark: #0a9f4a;
  --wechat-green-soft: rgba(7, 193, 96, 0.12);
  --bg: #f5f7f9;
  --bg-strong: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  position: relative;
}

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

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

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.bg-animated {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background: linear-gradient(135deg, #f1f5f9 0%, #f8fafc 40%, #eef2f7 100%);
}

.bg-animated::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(15, 23, 42, 0.05) 1px,
      transparent 1px),
    linear-gradient(120deg,
      rgba(7, 193, 96, 0.08),
      rgba(59, 130, 246, 0.05),
      rgba(7, 193, 96, 0.1));
  background-size: 32px 32px, 200% 200%;
  animation: meshShift 18s ease-in-out infinite;
  opacity: 0.9;
}

.mesh {
  position: absolute;
  inset: -20%;
  background: radial-gradient(circle at 20% 20%,
      rgba(7, 193, 96, 0.18),
      transparent 60%),
    radial-gradient(circle at 80% 10%,
      rgba(59, 130, 246, 0.18),
      transparent 55%),
    radial-gradient(circle at 70% 80%,
      rgba(34, 197, 94, 0.2),
      transparent 60%);
  filter: blur(12px);
  opacity: 0.8;
  animation: meshFloat 22s ease-in-out infinite;
}

.orb {
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  filter: blur(0);
  opacity: 0.7;
  mix-blend-mode: multiply;
  animation: float 16s ease-in-out infinite;
}

.orb-1 {
  background: radial-gradient(circle, rgba(7, 193, 96, 0.35), transparent 70%);
  top: -120px;
  left: -80px;
}

.orb-2 {
  background: radial-gradient(circle, rgba(59, 130, 246, 0.28), transparent 70%);
  top: 10%;
  right: -120px;
  animation-delay: -6s;
}

.orb-3 {
  background: radial-gradient(circle, rgba(16, 185, 129, 0.3), transparent 70%);
  bottom: -140px;
  left: 20%;
  animation-delay: -10s;
}

.orb-4 {
  background: radial-gradient(circle, rgba(56, 189, 248, 0.24), transparent 70%);
  bottom: 10%;
  right: 12%;
  animation-delay: -4s;
}

.nav {
  position: sticky;
  top: 16px;
  z-index: 20;
  margin: 16px auto 0;
  width: min(1120px, 92vw);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(16px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, #09d071, #04a453);
  display: grid;
  place-items: center;
  position: relative;
  box-shadow: 0 10px 20px rgba(7, 193, 96, 0.25);
}

.logo-dot {
  width: 16px;
  height: 16px;
  border-radius: 6px;
  background: #ffffff;
  box-shadow: inset 0 -4px 8px rgba(0, 0, 0, 0.08);
}

.logo-text {
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-weight: 500;
}

.nav-links a {
  padding: 8px 10px;
  border-radius: 10px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(7, 193, 96, 0.12);
}

.nav-actions {
  display: flex;
  gap: 10px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(7, 193, 96, 0.12);
  color: var(--wechat-green);
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

.nav-drawer {
  display: none;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  border-top: 1px solid var(--border);
}

.nav-drawer a {
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
  background: rgba(15, 23, 42, 0.04);
}

.nav-drawer-actions {
  display: grid;
  gap: 10px;
  margin-top: 8px;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  align-items: center;
  padding: 70px 0 40px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--wechat-green-soft);
  color: var(--wechat-green-dark);
  font-weight: 600;
  font-size: 0.85rem;
}

.hero h1 {
  margin: 18px 0 16px;
  font-size: clamp(2.2rem, 3vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.brand-gradient {
  background: linear-gradient(120deg, #07c160, #38bdf8);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: textShine 8s ease-in-out infinite;
}

.hero-subtitle {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 20px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  color: var(--muted);
}

.hero-stats strong {
  font-size: 1.2rem;
  color: var(--text);
  display: block;
  margin-bottom: 6px;
}

.btn {
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #07c160, #0bbf5e);
  color: #ffffff;
  box-shadow: 0 14px 30px rgba(7, 193, 96, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 34px rgba(7, 193, 96, 0.3);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.btn-lg {
  padding: 12px 22px;
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
}

.phone-mock {
  width: min(360px, 90vw);
  background: #ffffff;
  border-radius: 32px;
  padding: 18px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.phone-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 14px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.15);
}

.chat-list {
  background: #f8fafc;
  border-radius: 18px;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.chat-item {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px;
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.06);
  font-size: 0.78rem;
}

.chat-item.active {
  border: 1px solid rgba(7, 193, 96, 0.3);
}

.chat-item p {
  margin: 0;
  font-weight: 600;
}

.chat-item span {
  color: var(--muted);
  font-size: 0.72rem;
}

.chat-item small {
  color: #94a3b8;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(135deg, #07c160, #38bdf8);
}

.avatar.muted {
  background: linear-gradient(135deg, #cbd5f5, #a5b4fc);
}

.chat-bubbles {
  margin-top: 12px;
  display: grid;
  gap: 8px;
}

.bubble {
  background: #f1f5f9;
  padding: 10px 14px;
  border-radius: 16px 16px 16px 4px;
  font-size: 0.82rem;
  color: var(--text);
}

.bubble.me {
  background: var(--wechat-green);
  color: #ffffff;
  margin-left: auto;
  border-radius: 16px 16px 4px 16px;
}

.input-bar {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.input-pill {
  flex: 1;
  height: 36px;
  border-radius: 999px;
  background: #f1f5f9;
}

.send-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--wechat-green);
  color: #ffffff;
  display: grid;
  place-items: center;
}

.floating-card {
  position: absolute;
  bottom: -40px;
  right: -10px;
  width: 220px;
  background: #ffffff;
  border-radius: 18px;
  padding: 14px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(7, 193, 96, 0.2);
}

.card-header {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  margin-bottom: 8px;
}

.pill {
  background: rgba(7, 193, 96, 0.12);
  color: var(--wechat-green-dark);
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.7rem;
}

.card-actions {
  display: flex;
  gap: 10px;
  color: #64748b;
  font-size: 0.7rem;
  margin-top: 8px;
}

.section {
  padding: 70px 0;
}

.section-alt {
  background: #f8fafc;
  border-top: 1px solid rgba(15, 23, 42, 0.05);
  border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: clamp(1.6rem, 2.4vw, 2.4rem);
  margin-bottom: 10px;
}

.section-header p {
  color: var(--muted);
  max-width: 640px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.feature-card {
  padding: 22px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 34px rgba(15, 23, 42, 0.12);
}

.feature-card h3 {
  margin: 16px 0 10px;
  font-size: 1.1rem;
}

.feature-card p {
  color: var(--muted);
  margin: 0 0 16px;
  line-height: 1.6;
}

.icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: rgba(7, 193, 96, 0.12);
  color: var(--wechat-green-dark);
  display: grid;
  place-items: center;
}

.icon svg {
  width: 22px;
  height: 22px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chips span {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.05);
  color: #334155;
  font-size: 0.72rem;
  font-weight: 600;
}

.moments-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.moment-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.06);
}

.moment-header {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.moment-avatar {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  background: linear-gradient(135deg, #07c160, #38bdf8);
}

.moment-avatar.alt {
  background: linear-gradient(135deg, #34d399, #fbbf24);
}

.moment-avatar.muted {
  background: linear-gradient(135deg, #cbd5f5, #94a3b8);
}

.moment-header p {
  margin: 4px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.moment-body {
  margin: 0;
  color: var(--text);
  line-height: 1.6;
}

.moment-footer {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  font-size: 0.72rem;
  color: #64748b;
}

.table-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.06);
  padding: 8px;
}

.table-scroll {
  overflow-x: auto;
}

.friend-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.friend-table th,
.friend-table td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  font-size: 0.9rem;
}

.friend-table th {
  color: var(--muted);
  font-weight: 600;
  background: #f8fafc;
}

.friend-table tr:last-child td {
  border-bottom: none;
}

.friend-table tbody tr {
  transition: background 0.2s ease;
}

.friend-table tbody tr:hover {
  background: rgba(7, 193, 96, 0.08);
}

.carousel {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.carousel-window {
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.carousel-track {
  display: flex;
  width: 100%;
  transition: transform 0.6s ease;
}

.carousel-item {
  flex: 0 0 100%;
  text-align: center;
}

.carousel-item img {
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  background: #f8fafc;
  max-height: 70vh;
  object-fit: contain;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.carousel-item figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.85rem;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(15, 23, 42, 0.08);
  color: var(--text);
  box-shadow: 0 10px 18px rgba(15, 23, 42, 0.1);
  display: grid;
  place-items: center;
  transition: transform 0.2s ease;
}

.carousel-btn:hover {
  transform: translateY(-2px);
}

.carousel-btn svg {
  width: 18px;
  height: 18px;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 18px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.2);
  transition: width 0.2s ease, background 0.2s ease;
}

.dot.active {
  width: 28px;
  background: var(--wechat-green);
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.roadmap-column {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 22px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.06);
}

.roadmap-column h3 {
  margin: 0 0 16px;
  font-size: 1.05rem;
}

.roadmap-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.roadmap-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 10px 12px;
  border-radius: 14px;
  background: #f8fafc;
  border: 1px solid rgba(15, 23, 42, 0.05);
  font-size: 0.9rem;
}

.roadmap-item .status-icon {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1.5px solid rgba(15, 23, 42, 0.12);
  background: #ffffff;
  display: grid;
  place-items: center;
  margin-top: 2px;
  flex-shrink: 0;
}

.roadmap-item.done {
  background: #ecfdf5;
  border-color: rgba(7, 193, 96, 0.22);
  color: var(--text);
}

.roadmap-item.done .status-icon {
  background: var(--wechat-green);
  border-color: var(--wechat-green);
}

.roadmap-item.done .status-icon::after {
  content: "";
  width: 8px;
  height: 4px;
  border-left: 2px solid #ffffff;
  border-bottom: 2px solid #ffffff;
  transform: rotate(-45deg);
  display: block;
}

.roadmap-item.pending {
  color: var(--muted);
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.stack-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 22px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.06);
}

.stack-card h3 {
  margin-top: 0;
}

.stack-card p {
  color: var(--muted);
  line-height: 1.6;
}

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.stack-tags span {
  background: rgba(7, 193, 96, 0.12);
  color: var(--wechat-green-dark);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
}

.cta-banner {
  margin-top: 32px;
  padding: 26px;
  border-radius: 22px;
  background: linear-gradient(135deg, #07c160, #38bdf8);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.cta-banner h3 {
  margin: 0 0 6px;
}

.footer {
  padding: 40px 0 60px;
  color: var(--muted);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@keyframes float {

  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }

  50% {
    transform: translate3d(18px, -20px, 0);
  }
}

@keyframes meshShift {
  0% {
    background-position: 0% 50%, 0% 50%;
  }

  50% {
    background-position: 100% 50%, 100% 50%;
  }

  100% {
    background-position: 0% 50%, 0% 50%;
  }
}

@keyframes meshFloat {

  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }

  50% {
    transform: translate3d(-12px, 14px, 0);
  }
}

@keyframes textShine {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

@media (max-width: 900px) {

  .nav-links,
  .nav-actions {
    display: none;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .nav-drawer.open {
    display: flex;
  }

  .floating-card {
    position: static;
    margin-top: 16px;
  }

  .carousel-btn {
    display: none;
  }

  .cta-banner {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .orb,
  .mesh,
  .brand-gradient {
    animation: none !important;
  }
}
/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  cursor: zoom-out;
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transform: scale(0.9);
  transition: transform 0.3s ease;
  cursor: default;
}

.lightbox.active .lightbox-img {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-size: 2rem;
  display: grid;
  place-items: center;
  transition: background 0.2s ease, transform 0.2s ease;
  cursor: pointer;
  border: none;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.carousel-item img {
  cursor: zoom-in;
}