/* ========== CSS Reset & Base ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 70px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #0a0e27;
  color: #e0e0e0;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0d1230; }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, #ff4655, #e03a47); border-radius: 4px; }

/* ========== Utility ========== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section-title {
  text-align: center;
  margin-bottom: 50px;
  position: relative;
}
.section-title h2 {
  font-size: 32px;
  font-weight: 800;
  background: linear-gradient(135deg, #ff4655, #ff8a00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
  letter-spacing: 2px;
}
.section-title p {
  color: #8892b0;
  font-size: 15px;
  margin-top: 10px;
}
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #ff4655, #ff8a00);
  margin: 15px auto 0;
  border-radius: 2px;
}
section { padding: 80px 0; }

/* ========== Navigation ========== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 14, 39, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 70, 85, 0.15);
  transition: background 0.3s;
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 65px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
}
.nav-logo .logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, #ff4655, #ff8a00);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -1px;
}
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a {
  color: #a0aec0;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
  padding: 5px 0;
}
.nav-links a:hover { color: #ff4655; }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 2px;
  background: #ff4655;
  transform: scaleX(0);
  transition: transform 0.2s;
}
.nav-links a:hover::after { transform: scaleX(1); }
.nav-download {
  background: linear-gradient(135deg, #ff4655, #e03a47);
  color: #fff !important;
  padding: 8px 22px !important;
  border-radius: 6px;
  font-weight: 600 !important;
  transition: transform 0.2s, box-shadow 0.2s !important;
}
.nav-download:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(255, 70, 85, 0.4);
}
.nav-download::after { display: none !important; }

/* Mobile Nav */
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 5px; }
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: 0.3s;
}

/* ========== Hero Banner ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 65px;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(255, 70, 85, 0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(0, 120, 255, 0.06) 0%, transparent 50%);
  animation: heroBg 20s ease-in-out infinite alternate;
}
@keyframes heroBg {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-5%, 3%) rotate(3deg); }
}
.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 60px;
}
.hero-content { flex: 1; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 70, 85, 0.12);
  border: 1px solid rgba(255, 70, 85, 0.25);
  color: #ff4655;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}
.hero-badge .pulse-dot {
  width: 8px; height: 8px;
  background: #ff4655;
  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(1.4); }
}
.hero h1 {
  font-size: 52px;
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero h1 .highlight {
  background: linear-gradient(135deg, #ff4655, #ff8a00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 17px;
  color: #8892b0;
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 520px;
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #ff4655, #e03a47);
  color: #fff;
  padding: 14px 36px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 70, 85, 0.4);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  padding: 14px 36px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: background 0.2s, border-color 0.2s;
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Hero Visual */
.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
.hero-card {
  width: 380px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 30px;
  backdrop-filter: blur(10px);
  transform: perspective(800px) rotateY(-5deg) rotateX(3deg);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4),
              0 0 80px rgba(255, 70, 85, 0.08);
}
.hero-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.hero-card-avatar {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #ff4655, #ff8a00);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  font-weight: 900;
  color: #fff;
}
.hero-card-info h4 { color: #fff; font-size: 15px; }
.hero-card-info span { color: #6b7a90; font-size: 12px; }
.hero-card-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}
.hero-stat {
  text-align: center;
  padding: 14px 8px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.hero-stat .num {
  font-size: 22px;
  font-weight: 800;
  color: #ff4655;
}
.hero-stat .label {
  font-size: 11px;
  color: #6b7a90;
  margin-top: 4px;
}
.hero-card-bars { display: flex; flex-direction: column; gap: 12px; }
.bar-item { display: flex; flex-direction: column; gap: 5px; }
.bar-item .bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: #8892b0;
}
.bar-track {
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, #ff4655, #ff8a00);
  animation: barGrow 1.5s ease-out forwards;
  transform-origin: left;
  transform: scaleX(0);
}
@keyframes barGrow { to { transform: scaleX(1); } }
.bar-fill.green { background: linear-gradient(90deg, #00d4aa, #00a8ff); }
.bar-fill.purple { background: linear-gradient(90deg, #a855f7, #6366f1); }

/* ========== Stats Section ========== */
.stats-section {
  background: rgba(255, 255, 255, 0.01);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 50px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}
.stat-item .stat-number {
  font-size: 40px;
  font-weight: 900;
  background: linear-gradient(135deg, #ff4655, #ff8a00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}
.stat-item .stat-number.blue {
  background: linear-gradient(135deg, #00d4aa, #00a8ff);
  -webkit-background-clip: text;
  background-clip: text;
}
.stat-item .stat-number.purple {
  background: linear-gradient(135deg, #a855f7, #6366f1);
  -webkit-background-clip: text;
  background-clip: text;
}
.stat-item .stat-label {
  color: #6b7a90;
  font-size: 14px;
  margin-top: 6px;
}

/* ========== Features Section ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 32px 28px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #ff4655, #ff8a00);
  transform: scaleX(0);
  transition: transform 0.3s;
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 70, 85, 0.2);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.feature-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}
.feature-icon.red { background: rgba(255, 70, 85, 0.12); }
.feature-icon.blue { background: rgba(0, 168, 255, 0.12); }
.feature-icon.green { background: rgba(0, 212, 170, 0.12); }
.feature-icon.purple { background: rgba(168, 85, 247, 0.12); }
.feature-icon.orange { background: rgba(255, 138, 0, 0.12); }
.feature-icon.cyan { background: rgba(0, 212, 255, 0.12); }
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: #6b7a90;
  line-height: 1.7;
}
.feature-card .tag {
  display: inline-block;
  margin-top: 16px;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}
.feature-card .tag.hot {
  background: rgba(255, 70, 85, 0.15);
  color: #ff4655;
}
.feature-card .tag.new {
  background: rgba(0, 212, 170, 0.15);
  color: #00d4aa;
}

/* ========== Showcase / Screenshots ========== */
.showcase {
  background: rgba(255, 255, 255, 0.01);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.showcase-item {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.02);
  transition: transform 0.3s, box-shadow 0.3s;
}
.showcase-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.showcase-thumb {
  width: 100%;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  position: relative;
  overflow: hidden;
}
.showcase-thumb.t1 {
  background: linear-gradient(135deg, #1a1f4e, #2a1f4e);
}
.showcase-thumb.t2 {
  background: linear-gradient(135deg, #1a2f3e, #1a3f4e);
}
.showcase-thumb.t3 {
  background: linear-gradient(135deg, #2a1f3e, #1a1f3e);
}
.showcase-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 70, 85, 0.1), transparent 70%);
}
.showcase-info { padding: 20px; }
.showcase-info h3 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.showcase-info p {
  font-size: 13px;
  color: #6b7a90;
  line-height: 1.6;
}

/* ========== Download Section ========== */
.download-section {
  text-align: center;
  position: relative;
  overflow: hidden;
}
.download-section::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255, 70, 85, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.download-box {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  padding: 50px 40px;
  backdrop-filter: blur(10px);
}
.download-icon {
  width: 80px; height:  80px;
  margin: 0 auto 24px;
  background: linear-gradient(135deg, #ff4655, #ff8a00);
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.download-box h2 {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.download-box p {
  color: #6b7a90;
  font-size: 15px;
  margin-bottom: 30px;
}
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, #ff4655, #e03a47);
  color: #fff;
  padding: 16px 48px;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
  cursor: pointer;
}
.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(255, 70, 85, 0.5);
}
.download-btn .arrow { font-size: 22px; transition: transform 0.2s; }
.download-btn:hover .arrow { transform: translateY(3px); }
.download-meta {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.download-meta span {
  font-size: 13px;
  color: #4a5568;
  display: flex;
  align-items: center;
  gap: 6px;
}
.download-meta .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #ff4655;
  display: inline-block;
}

/* ========== How It Works ========== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-card {
  text-align: center;
  padding: 36px 24px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  position: relative;
  transition: transform 0.3s, border-color 0.3s;
}
.step-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 70, 85, 0.2);
}
.step-number {
  width: 48px; height: 48px;
  line-height: 48px;
  text-align: center;
  border-radius: 14px;
  background: linear-gradient(135deg, #ff4655, #ff8a00);
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  margin: 0 auto 18px;
}
.step-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.step-card p {
  font-size: 13px;
  color: #6b7a90;
  line-height: 1.7;
}
.step-arrow {
  position: absolute;
  top: 50%;
  right: -18px;
  transform: translateY(-50%);
  color: #ff4655;
  font-size: 22px;
  opacity: 0.5;
}

/* ========== FAQ Section ========== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item:hover { border-color: rgba(255, 70, 85, 0.15); }
.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-question h3 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}
.faq-toggle {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  color: #8892b0;
  transition: transform 0.3s, background 0.3s;
  flex-shrink: 0;
}
.faq-item.active .faq-toggle {
  transform: rotate(180deg);
  background: rgba(255, 70, 85, 0.15);
  color: #ff4655;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.active .faq-answer { max-height: 400px; }
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: #6b7a90;
  line-height: 1.8;
}

/* ========== Footer ========== */
.footer {
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-text {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 13px;
  color: #4a5568;
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a {
  font-size: 13px;
  color: #4a5568;
  transition: color 0.2s;
}
.footer-col ul a:hover { color: #ff4655; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 12px;
  color: #4a5568;
}
.footer-bottom a { color: #4a5568; transition: color 0.2s; }
.footer-bottom a:hover { color: #ff4655; }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero .container { flex-direction: column; text-align: center; }
  .hero h1 { font-size: 40px; }
  .hero-desc { margin: 0 auto 30px; }
  .hero-buttons { justify-content: center; }
  .hero-card { width: 340px; transform: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .step-arrow { display: none; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 65px; left: 0; right: 0;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(12px);
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid rgba(255, 70, 85, 0.15);
  }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 30px; }
  .hero-desc { font-size: 15px; }
  .hero-card { width: 100%; max-width: 340px; }
  .features-grid { grid-template-columns: 1fr; }
  .showcase-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .download-box { padding: 36px 24px; }
  .download-btn { padding: 14px 36px; font-size: 16px; }
  section { padding: 60px 0; }
  .section-title h2 { font-size: 24px; }
}

/* ========== Animations (Intersection Observer fallback with :target) ========== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}