/* ===== CSS Variables ===== */
:root {
  --gold-start: #D4A574;
  --gold-end: #B8860B;
  --gold-mid: #C4954A;
  --bg: #FFF8F0;
  --bg-card: #FFFFFF;
  --text-primary: #2D2013;
  --text-secondary: #6B5B4E;
  --text-light: #9A8B7A;
  --shadow: 0 4px 24px rgba(180,134,11,0.10);
  --shadow-hover: 0 8px 40px rgba(180,134,11,0.20);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.35s cubic-bezier(0.4,0,0.2,1);
  --max-w: 1200px;
  --nav-h: 64px;
}

/* ===== Reset ===== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { border: none; cursor: pointer; font-family: inherit; }

/* ===== Utilities ===== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section-title {
  text-align: center;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--gold-start), var(--gold-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 56px;
}
.gold-gradient {
  background: linear-gradient(135deg, var(--gold-start), var(--gold-end));
}
.btn-gold {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--gold-start), var(--gold-end));
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 1px;
  box-shadow: 0 4px 20px rgba(180,134,11,0.35);
  transition: var(--transition);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(180,134,11,0.45);
}
.fade-in {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  z-index: 1000;
  transition: var(--transition);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(255,248,240,0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 16px rgba(180,134,11,0.08);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
}
.nav-logo svg { width: 36px; height: 36px; }
.nav-logo-text {
  background: linear-gradient(135deg, var(--gold-start), var(--gold-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--gold-start), var(--gold-end));
  transition: var(--transition);
}
.nav-links a:hover { color: var(--gold-end); }
.nav-links a:hover::after { width: 100%; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2.5px;
  background: var(--gold-end);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #FFF8F0 0%, #F5E6D3 40%, #E8D5B8 100%);
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%; right: -20%;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(212,165,116,0.18) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%; left: -15%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(184,134,11,0.12) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-content { position: relative; z-index: 1; padding: 120px 24px 80px; }
.hero-badge {
  display: inline-block;
  padding: 6px 20px;
  border-radius: 50px;
  background: rgba(184,134,11,0.1);
  color: var(--gold-end);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(184,134,11,0.2);
}
.hero h1 {
  font-size: clamp(2.2rem, 7vw, 4rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--gold-start), var(--gold-end), #8B6914);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 40px;
}
.hero-cta-group { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.qr-placeholder {
  width: 200px; height: 200px;
  border: 2px dashed rgba(184,134,11,0.3);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 0.85rem;
  background: rgba(255,255,255,0.6);
  margin-top: 12px;
}

/* ===== Sections ===== */
section { padding: 100px 0; }

/* Product Intro */
.product-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 40px 28px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold-start), var(--gold-end));
  opacity: 0;
  transition: var(--transition);
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}
.product-card:hover::before { opacity: 1; }
.product-card .icon {
  width: 72px; height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  background: linear-gradient(135deg, rgba(212,165,116,0.15), rgba(184,134,11,0.1));
}
.product-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.product-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}
.product-card .step-num {
  position: absolute;
  top: 16px; right: 20px;
  font-size: 3rem;
  font-weight: 900;
  color: rgba(184,134,11,0.06);
  line-height: 1;
}

/* Goal Types */
.goal-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.goal-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.goal-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.goal-item .icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
}
.goal-item h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.goal-item p {
  font-size: 0.82rem;
  color: var(--text-light);
}

/* Monitor Modes */
.monitor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.monitor-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 48px 36px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.monitor-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.monitor-card .mode-badge {
  display: inline-block;
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(212,165,116,0.15), rgba(184,134,11,0.1));
  color: var(--gold-end);
}
.monitor-card h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.monitor-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
}
.monitor-card .features {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.monitor-card .features span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.monitor-card .features span::before {
  content: '✓';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-start), var(--gold-end));
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* Judge */
.judge-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.judge-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.judge-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.judge-card .emoji { font-size: 2.5rem; margin-bottom: 12px; }
.judge-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 14px;
}
.judge-card blockquote {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-style: italic;
  line-height: 1.6;
  position: relative;
  padding: 0 8px;
}

/* Charity */
.charity {
  background: linear-gradient(160deg, #2D2013 0%, #4A3520 100%);
  color: #fff;
}
.charity .section-title {
  background: linear-gradient(135deg, #F0D9A0, #D4A574);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.charity .section-subtitle { color: rgba(255,255,255,0.6); }
.charity-content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.charity-content p {
  color: rgba(255,255,255,0.8);
  font-size: 1.05rem;
  margin-bottom: 16px;
  line-height: 1.8;
}
.charity-highlight {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 800;
  color: #F0D9A0;
  margin-bottom: 32px !important;
}
.charity-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: 50px;
  border: 1.5px solid rgba(212,165,116,0.4);
  color: #F0D9A0;
  font-weight: 600;
  transition: var(--transition);
  margin-top: 12px;
}
.charity-link:hover {
  background: rgba(212,165,116,0.12);
  border-color: #D4A574;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--gold-start), var(--gold-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* Download */
.download {
  text-align: center;
  background: linear-gradient(160deg, #FFF8F0 0%, #F5E6D3 100%);
}
.download-qr {
  width: 200px; height: 200px;
  margin: 0 auto 24px;
  border: 2px dashed rgba(184,134,11,0.3);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 0.9rem;
  background: rgba(255,255,255,0.8);
}
.download p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-top: 8px;
}

/* Footer */
footer {
  background: #1A1208;
  color: rgba(255,255,255,0.6);
  padding: 56px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .nav-logo { margin-bottom: 12px; }
.footer-brand .nav-logo-text {
  background: linear-gradient(135deg, var(--gold-start), var(--gold-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-brand p { font-size: 0.9rem; line-height: 1.7; }
.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 0.88rem;
  margin-bottom: 10px;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--gold-start); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== Mobile Menu ===== */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: rgba(255,248,240,0.98);
  backdrop-filter: blur(12px);
  padding: 24px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  z-index: 999;
}
.mobile-menu.active { display: block; }
.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(184,134,11,0.08);
}
.mobile-menu a:last-child { border-bottom: none; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .goal-grid { grid-template-columns: repeat(3, 1fr); }
  .judge-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .product-cards { grid-template-columns: 1fr; }
  .goal-grid { grid-template-columns: repeat(2, 1fr); }
  .monitor-grid { grid-template-columns: 1fr; }
  .judge-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  section { padding: 72px 0; }
  .hero-content { padding: 100px 20px 60px; }
}
@media (max-width: 480px) {
  .goal-grid { grid-template-columns: 1fr; }
  .judge-grid { grid-template-columns: 1fr; }
}

/* ===== Logo & QR Code ===== */
.nav-logo { height: 40px; width: auto; vertical-align: middle; }
.qrcode-img { width: 200px; height: 200px; object-fit: contain; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }