:root {
  --bg: #F8FAFC;
  --paper: #ffffff;
  --ink: #0F172A;
  --muted: #64748B;
  --line: #E2E8F0;
  --blue: #2563EB;
  --blue-dark: #1e40af;
  --blue-light: #60a5fa;
  --navy: #1e3a5f;
  --shadow: 0 18px 46px rgba(13, 27, 42, .12);
  --container: 1280px;
  --radius: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, PingFang SC, Microsoft YaHei, Arial, sans-serif;
  line-height: 1.68;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(var(--container), calc(100% - 44px)); margin: 0 auto; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid rgba(200, 216, 232, .82);
  backdrop-filter: blur(14px);
}
.header-inner {
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  color: #fff; background: var(--blue);
  font-size: 22px;
  font-weight: 900;
}
.brand-title {
  display: block;
  font-size: 22px; font-weight: 950; line-height: 1; white-space: nowrap; color: var(--navy);
}
.nav {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 800;
  justify-content: center;
  flex: 1;
}
.nav a {
  padding: 9px 15px;
  border-radius: var(--radius);
  color: #32403f;
  transition: color .22s ease, background-color .22s ease;
}
.nav a:hover, .nav a.active {
  background: #EFF6FF;
  color: #1D4ED8;
}
.nav-btn {
  color: #fff;
  background: var(--blue);
  padding: 9px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
  transition: background .2s ease, transform .15s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.nav-btn:hover { background: var(--blue-dark); transform: translateY(-1px); }
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  font-size: 15px;
}
.mobile-nav {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--paper);
}
.mobile-nav a {
  display: block;
  padding: 14px 22px;
  border-bottom: 1px solid #e8f0f8;
  font-weight: 800;
}
.mobile-nav-btn {
  display: block;
  text-align: center;
  background: var(--blue);
  color: #fff;
  padding: 14px 22px;
  border-radius: var(--radius);
  font-weight: 800;
  text-decoration: none;
}

/* Buttons */
.btn {
  min-height: 42px;
  padding: 0 18px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 900;
  cursor: pointer;
  white-space: nowrap;
  transition: background .2s ease, transform .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 14px 28px rgba(37,99,235, .22);
}
.btn-primary:hover { background: var(--blue-dark); }
.btn-light {
  background: var(--paper);
  border-color: var(--line);
  color: var(--ink);
}
.btn-dark {
  background: #1e3a5f;
  color: #fff;
}
.btn-download {
  color: #fff;
  background: linear-gradient(135deg, #1e3a5f, #2563EB);
  box-shadow: 0 8px 20px rgba(37,99,235,.28);
}
.btn-download:hover {
  background: linear-gradient(135deg, #1e40af, #2563EB);
  box-shadow: 0 10px 24px rgba(37,99,235,.35);
}
.btn-outline {
  background: transparent;
  border: 1.5px solid #E2E8F0;
  color: #32403f;
  font-weight: 800;
  padding: 0 20px;
  height: 42px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all .2s ease;
  width: 100%;
}
.btn-outline:hover {
  border-color: #2563EB;
  color: #1e3a5f;
  background: #EFF6FF;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 50%, #EFF6FF 100%);
  background-size: cover;
}
.hero-inner {
  min-height: 650px;
  padding: 76px 0 58px;
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  gap: 34px;
  align-items: center;
}
.hero-text h1 {
  margin: 0 0 16px;
  color: var(--navy);
  font-size: clamp(38px, 5.2vw, 68px);
  line-height: 1.06;
}
.hero-copy {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}
.hero-metrics {
  display: flex;
  gap: 32px;
  margin-top: 28px;
}
.metric { display: flex; flex-direction: column; gap: 2px; }
.metric b { font-size: 34px; font-weight: 900; color: #1D4ED8; line-height: 1; }
.metric span { font-size: 13px; color: var(--muted); font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-soft {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-soft img {
  width: 100%;
  max-width: 620px;
  border-radius: 20px;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}
.hero-soft-glow {
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(56,189,248,.25) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
  z-index: 0;
}
.soft-chip {
  position: absolute;
  z-index: 2;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 800;
  color: #1D4ED8;
  box-shadow: 0 8px 20px rgba(13,27,42,.12);
  white-space: nowrap;
}
.soft-chip-top { right: 10%; top: 12%; }
.soft-chip-bottom { left: 8%; bottom: 18%; }

/* Section Common */
.section { padding: 120px 0; }
.section-alt { background: var(--paper); }
.section-head { margin-bottom: 52px; }
.section-head-center { text-align: center; }
.section-head h2 {
  margin: 0 0 14px;
  font-size: 42px;
  font-weight: 950;
  color: var(--navy);
  line-height: 1.2;
}
.section-head p { margin: 0 auto; color: var(--muted); font-size: 17px; max-width: 680px; text-align: center; }

/* Stats Section - 优化版本 */
.stats-section {
  background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%);
}
.achievement-box {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.achievement-item {
  position: relative;
  text-align: center;
  padding: 36px 24px;
  background: linear-gradient(145deg, #ffffff 0%, #F8FAFC 100%);
  border-radius: 20px;
  border: 1px solid rgba(226, 232, 240, 0.6);
  box-shadow: 0 8px 32px rgba(148, 163, 184, 0.12), 0 2px 8px rgba(148, 163, 184, 0.08);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  transform: translateY(30px);
}
.achievement-item.visible {
  opacity: 1;
  transform: translateY(0);
}
.achievement-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(148, 163, 184, 0.18), 0 4px 12px rgba(148, 163, 184, 0.12);
  border-color: rgba(37, 99, 235, 0.2);
}
.achievement-icon-wrap {
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ach-icon {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}
.achievement-info {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.achievement-value {
  font-size: 48px;
  font-weight: 950;
  color: var(--navy);
  line-height: 1.1;
  letter-spacing: -1px;
  display: flex;
  align-items: baseline;
  justify-content: center;
}
.ach-suffix {
  font-size: 28px;
  font-weight: 800;
  margin-left: 2px;
  color: var(--blue);
}
.achievement-title {
  font-size: 14px;
  color: var(--muted);
  font-weight: 600;
  margin-top: 10px;
  letter-spacing: 0.2px;
}

/* Core Functions (核心功能) */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: transform .22s ease, box-shadow .22s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0,0,0,.08);
}
.feature-card .icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 17px;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, #2563EB, #60A5FA);
  margin-bottom: 16px;
}
.feature-card h3 { margin: 0 0 8px; font-size: 18px; font-weight: 800; color: var(--navy); }
.feature-card p { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.65; }

/* Advantages (为什么选择我们) */
.advantage-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 28px;
  align-items: stretch;
}
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.advantage-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform .22s ease, box-shadow .22s ease;
}
.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0,0,0,.08);
}
.adv-icon {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-size: 20px;
}
.advantage-card h3 { margin: 2px 0 8px; font-size: 17px; font-weight: 800; color: var(--navy); }
.advantage-card p { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.65; }
.advantage-stats {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.adv-stat {
  text-align: center;
  padding: 24px 20px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  box-shadow: 0 10px 28px rgba(37,99,235,.18);
  transition: transform .22s ease, box-shadow .22s ease;
}
.adv-stat:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(37,99,235,.25);
}
.adv-stat b {
  display: block;
  font-size: 34px;
  font-weight: 950;
  color: #fff;
  line-height: 1.1;
}
.adv-stat span {
  font-size: 14px;
  color: rgba(255,255,255,.75);
  font-weight: 600;
}

/* Core Features */
.core-features-section { background: linear-gradient(180deg, #F8FAFC 0%, #ffffff 100%); }
.core-features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}
.core-feature-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform .22s ease, box-shadow .22s ease;
}
.core-feature-card:hover { transform: translateY(-5px); box-shadow: 0 12px 30px rgba(0,0,0,.08); }
.cf-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}
.cf-icon-blue { background: linear-gradient(135deg, #2563EB, #60A5FA); }
.cf-icon-green { background: linear-gradient(135deg, #059669, #34D399); }
.cf-icon-purple { background: linear-gradient(135deg, #7C3AED, #A78BFA); }
.cf-icon-orange { background: linear-gradient(135deg, #EA580C, #FB923C); }
.cf-title { font-size: 18px; font-weight: 800; color: var(--navy); margin: 0 0 10px; }
.cf-desc { font-size: 14px; color: #64748B; margin-bottom: 20px; line-height: 1.6; }
.cf-list { list-style: none; padding: 0; margin: 0; text-align: left; display: flex; flex-direction: column; gap: 10px; }
.cf-list li { position: relative; padding-left: 20px; font-size: 13px; color: #475569; line-height: 1.45; }
.cf-list li::before { content: "\2713"; position: absolute; left: 0; font-weight: 700; font-size: 13px; line-height: 1; }
.cf-list-blue li::before { color: #2563EB; }
.cf-list-green li::before { color: #059669; }
.cf-list-purple li::before { color: #7C3AED; }
.cf-list-orange li::before { color: #EA580C; }

/* Gameplay */
.gameplay-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}
.gameplay-card {
  position: relative;
  padding: 32px 28px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--paper);
  transition: transform .22s ease, box-shadow .22s ease;
  overflow: hidden;
}
.gameplay-card::after {
  content: "";
  position: absolute;
  bottom: -30px;
  right: -30px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  opacity: .12;
}
.gameplay-card.gc-green { border-color: rgba(5,150,105,.2); }
.gameplay-card.gc-green::after { background: #059669; }
.gameplay-card.gc-blue { border-color: rgba(37,99,235,.2); }
.gameplay-card.gc-blue::after { background: linear-gradient(135deg, #2DD4BF, #10B981); }
.gameplay-card.gc-orange { border-color: rgba(234,88,12,.2); }
.gameplay-card.gc-orange::after { background: #EA580C; }
.gameplay-card.gc-purple { border-color: rgba(124,58,237,.2); }
.gameplay-card.gc-purple::after { background: #7C3AED; }
.gameplay-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0,0,0,.08);
}
.gc-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}
.gc-green  { background: linear-gradient(135deg, #059669, #34D399); }
.gc-blue   { background: linear-gradient(135deg, #2563EB, #60A5FA); }
.gc-orange { background: linear-gradient(135deg, #EA580C, #FB923C); }
.gc-purple { background: linear-gradient(135deg, #7C3AED, #A78BFA); }
.gameplay-card h3 { margin: 0 0 10px; font-size: 18px; font-weight: 800; color: var(--navy); }
.gameplay-card p { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.65; }

/* Pricing */
.pricing-section-head { margin-bottom: 52px; }
.pricing-section-head h2 { margin: 0 0 14px; font-size: 42px; font-weight: 950; color: var(--navy); line-height: 1.2; }
.pricing-section-head p { margin: 0 auto; color: var(--muted); font-size: 17px; max-width: 680px; text-align: center; }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  align-items: stretch;
}
.price-card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  transition: transform .22s ease, box-shadow .22s ease;
}
.price-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(37,99,235, .1);
}
.price-card-featured {
  border: 2px solid #2563EB;
  box-shadow: 0 16px 40px rgba(37,99,235,.15);
}
.price-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #2563EB, #38BDF8);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
}
.pc-top-bar {
  height: 4px;
  border-radius: 999px 999px 0 0;
  margin: -44px -36px 24px -36px;
}
.price-card .pc-top-bar { background: linear-gradient(90deg, #2563EB, #60A5FA); }
.price-card-featured .pc-top-bar { background: transparent; }
.pc-label {
  font-size: 13px;
  font-weight: 700;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.pc-price {
  font-size: 40px;
  font-weight: 950;
  color: #0F172A;
  line-height: 1;
  margin-bottom: 22px;
}
.pc-sub {
  font-size: 15px;
  font-weight: 600;
  color: #64748B;
  margin-left: 6px;
}
.pc-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pc-list li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  color: #475569;
  line-height: 1.5;
}
.pc-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  top: 0;
  color: #2563EB;
  font-weight: 800;
  font-size: 15px;
}
.price-card-featured .pc-list li::before { color: #2563EB; }

/* Contact */
.contact-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: stretch;
}
.contact-panel {
  position: relative;
  overflow: hidden;
  min-height: 340px;
  padding: 30px;
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 28px;
  align-items: center;
  border: 1px solid var(--line);
  background: var(--paper);
}
.contact-panel::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  opacity: .08;
}
.service-panel { border-color: rgba(5,150,105,.25); }
.service-panel::after { background: #059669; }
.tech-panel { border-color: rgba(37,99,235,.25); }
.tech-panel::after { background: #2563EB; }
.contact-panel-content { position: relative; z-index: 1; }
.contact-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(5,150,105,.1);
  color: #059669;
  margin-bottom: 12px;
}
.tech-panel .contact-label { background: rgba(59,130,246,.1); color: #245aa8; }
.contact-panel h3 { margin: 14px 0 10px; font-size: 31px; line-height: 1.18; color: var(--navy); }
.contact-panel p { margin: 0; color: var(--muted); font-size: 16px; }
.contact-tags { display: flex; gap: 8px; margin-top: 18px; flex-wrap: wrap; }
.contact-tags span {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  background: #F1F5F9;
  color: #475569;
  font-weight: 600;
}
.tech-panel .contact-tags span { border-color: rgba(59,130,246,.12); }
.qr-code { width: 140px; height: 140px; border-radius: 12px; object-fit: cover; border: 1px solid var(--line); }

/* CTA */
.cta {
  padding: 56px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  box-shadow: 0 16px 40px rgba(37,99,235,.2);
}
.cta h2 { margin: 0 0 8px; font-size: 34px; line-height: 1.2; color: #fff; }
.cta p { margin: 0; color: rgba(255,255,255,.8); max-width: 680px; font-size: 16px; }

/* Footer */
.site-footer {
  padding: 44px 0;
  background: var(--ink);
  color: rgba(255,255,255,.7);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
}
.site-footer strong { color: #fff; }
.site-footer p { margin: 6px 0; font-size: 14px; }
.footer-links { display: flex; gap: 48px; }
.footer-col { display: flex; flex-direction: column; gap: 8px; }
.footer-col strong { color: #fff; font-size: 14px; }
.footer-col a { color: rgba(255,255,255,.6); font-size: 14px; transition: color .2s ease; }
.footer-col a:hover { color: #fff; }
.footer-col span { font-size: 14px; color: rgba(255,255,255,.6); }

/* Media queries */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-text { order: 1; }
  .hero-soft { order: 0; }
  .hero-metrics { justify-content: center; }
  .hero-actions { justify-content: center; }
  .core-features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-layout { grid-template-columns: 1fr; }
  .achievement-box { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-links { gap: 28px; }
}
@media (max-width: 768px) {
  .nav { display: none; }
  .menu-toggle { display: flex; align-items: center; justify-content: center; }
  .mobile-nav.open { display: block; }
  .hero-inner { min-height: auto; padding: 48px 0 36px; }
  .hero-text h1 { font-size: 36px; }
  .hero-metrics { flex-direction: column; gap: 16px; align-items: center; }
  .core-features-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: 1fr; }
  .advantage-stats { flex-direction: column; }
  .gameplay-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; }
  .cta { flex-direction: column; text-align: center; padding: 36px 24px; }
  .cta h2 { font-size: 26px; }
  .footer-inner { flex-direction: column; }
  .footer-links { flex-direction: column; gap: 20px; }
  .section { padding: 68px 0; }
  .section h2 { font-size: 31px; }
  .pricing-section-head { text-align: center; }
  .pricing-section-head p { text-align: center; max-width: 680px; }
  .cta { display: block; padding: 30px; }
  .cta .hero-actions { margin-top: 22px; }
  .cta h2 { font-size: 26px; }
  .achievement-box { grid-template-columns: 1fr; }
}