/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #1a1a2e;
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ===== Variables ===== */
:root {
  --primary: #4F46E5;
  --primary-dark: #3730A3;
  --accent: #06B6D4;
  --accent-light: #67E8F9;
  --dark: #0F172A;
  --dark-light: #1E293B;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  --white: #FFFFFF;
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E1B4B 50%, #312E81 100%);
  --gradient-card: linear-gradient(180deg, rgba(79,70,229,0.03) 0%, rgba(6,182,212,0.03) 100%);
  --gradient-cta: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #06B6D4 100%);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --max-width: 1200px;
  --nav-height: 72px;
}

/* ===== Container ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow 0.3s ease;
}
.nav.scrolled { box-shadow: var(--shadow-md); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--dark); }
.nav-logo img { height: 32px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 14px; font-weight: 500; color: var(--gray-600);
  transition: color 0.2s ease; position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a.active::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: var(--primary); border-radius: 1px;
}
.nav-dropdown { position: relative; }
.nav-dropdown-trigger {
  display: flex; align-items: center; gap: 4px; cursor: pointer;
  font-size: 14px; font-weight: 500; color: var(--gray-600);
  transition: color 0.2s ease; background: none; border: none; padding: 0;
}
.nav-dropdown-trigger:hover { color: var(--primary); }
.nav-dropdown-trigger svg { width: 12px; height: 12px; transition: transform 0.2s ease; }
.nav-dropdown:hover .nav-dropdown-trigger svg { transform: rotate(180deg); }
.nav-dropdown-menu {
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  margin-top: 16px; min-width: 240px;
  background: var(--white); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl); border: 1px solid var(--gray-200);
  padding: 8px; opacity: 0; visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}
.nav-dropdown:hover .nav-dropdown-menu { opacity: 1; visibility: visible; }
.nav-dropdown-menu a {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; border-radius: var(--radius);
  font-size: 14px; color: var(--gray-700);
  transition: background 0.15s ease;
}
.nav-dropdown-menu a:hover { background: var(--gray-50); color: var(--primary); }
.nav-dropdown-menu .dd-icon {
  width: 36px; height: 36px; border-radius: var(--radius);
  background: var(--gradient-card); display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
}
.nav-dropdown-menu .dd-text strong { display: block; font-weight: 600; font-size: 14px; }
.nav-dropdown-menu .dd-text span { display: block; font-size: 12px; color: var(--gray-500); margin-top: 2px; }
.nav-cta {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 20px; border-radius: var(--radius);
  font-size: 14px; font-weight: 600; color: var(--white);
  background: var(--primary); border: none; cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); }
.nav-mobile-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 36px; height: 36px; padding: 6px;
}
.nav-mobile-toggle span {
  display: block; width: 100%; height: 2px; background: var(--dark);
  border-radius: 1px; transition: all 0.3s ease;
}
.nav-mobile-toggle span + span { margin-top: 5px; }
.nav-mobile-toggle.open span:first-child { transform: rotate(45deg) translate(5px, 5px); }
.nav-mobile-toggle.open span:nth-child(2) { opacity: 0; }
.nav-mobile-toggle.open span:last-child { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Mobile Nav ===== */
.mobile-nav {
  display: none; position: fixed; top: var(--nav-height); left: 0; right: 0; bottom: 0;
  background: var(--white); z-index: 999; padding: 24px;
  transform: translateX(100%); transition: transform 0.3s ease;
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav a {
  display: block; padding: 16px 0; font-size: 16px; font-weight: 500;
  color: var(--gray-700); border-bottom: 1px solid var(--gray-100);
}
.mobile-nav a:hover { color: var(--primary); }

/* ===== Hero ===== */
.hero {
  padding: 160px 0 100px;
  background: var(--gradient-hero);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(79,70,229,0.15) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(6,182,212,0.1) 0%, transparent 60%);
  pointer-events: none;
}
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
  position: relative; z-index: 1;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px 6px 8px; border-radius: 100px;
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12);
  font-size: 13px; color: rgba(255,255,255,0.8); margin-bottom: 24px;
}
.hero-badge-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px rgba(6,182,212,0.5);
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px); font-weight: 800; line-height: 1.15;
  color: var(--white); letter-spacing: -0.02em; margin-bottom: 20px;
}
.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 50%, #A78BFA 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 17px; line-height: 1.7; color: rgba(255,255,255,0.7);
  max-width: 520px; margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius); font-size: 15px; font-weight: 600;
  cursor: pointer; transition: all 0.2s ease; border: none;
}
.btn-primary {
  background: var(--gradient-cta); color: var(--white);
  box-shadow: 0 4px 14px rgba(79,70,229,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(79,70,229,0.45); }
.btn-secondary {
  background: rgba(255,255,255,0.1); color: var(--white);
  border: 1px solid rgba(255,255,255,0.2);
}
.btn-secondary:hover { background: rgba(255,255,255,0.15); }
.hero-visual {
  position: relative; display: flex; align-items: center; justify-content: center;
}
.hero-visual-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl); padding: 32px; backdrop-filter: blur(8px);
  width: 100%; max-width: 480px;
}
.hero-visual-card .code-block {
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  font-size: 13px; line-height: 1.8; color: rgba(255,255,255,0.8);
}
.hero-visual-card .code-keyword { color: #C084FC; }
.hero-visual-card .code-string { color: #34D399; }
.hero-visual-card .code-comment { color: rgba(255,255,255,0.35); }
.hero-visual-card .code-func { color: #60A5FA; }
.hero-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin-top: 60px; position: relative; z-index: 1;
}
.hero-stat {
  text-align: center; padding: 24px 16px;
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
}
.hero-stat-number {
  font-size: 36px; font-weight: 800; color: var(--white);
  letter-spacing: -0.02em; line-height: 1.2;
}
.hero-stat-number .accent { color: var(--accent-light); }
.hero-stat-label { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 6px; }
/* ===== Trust Metrics Bar ===== */
.trust-bar {
  padding: 48px 0;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
}
.trust-bar-grid {
  display: flex; align-items: center; justify-content: center; gap: 48px;
}
.trust-item { text-align: center; flex: 1; }
.trust-number {
  font-size: 40px; font-weight: 800; color: var(--dark);
  letter-spacing: -0.03em; line-height: 1.2;
}
.trust-number .accent { color: var(--primary); }
.trust-label { font-size: 14px; color: var(--gray-500); margin-top: 8px; }
.trust-divider {
  width: 1px; height: 48px; background: var(--gray-200); flex-shrink: 0;
}

/* ===== Section Common ===== */
.section { padding: 100px 0; }
.section-dark { background: var(--dark); color: var(--white); }
.section-gray { background: var(--gray-50); }
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--primary); margin-bottom: 16px;
}
.section-dark .section-label { color: var(--accent-light); }
.section-title {
  font-size: clamp(28px, 4vw, 40px); font-weight: 800; line-height: 1.2;
  letter-spacing: -0.02em; margin-bottom: 16px;
}
.section-desc {
  font-size: 17px; line-height: 1.7; color: var(--gray-500); max-width: 640px;
}
.section-dark .section-desc { color: rgba(255,255,255,0.6); }
.section-header { margin-bottom: 60px; }
.section-header.center { text-align: center; }
.section-header.center .section-desc { margin: 0 auto; }

/* ===== About Section ===== */
.about-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.about-card {
  padding: 32px 28px; border-radius: var(--radius-lg);
  background: var(--white); border: 1px solid var(--gray-200);
  transition: all 0.3s ease; position: relative; overflow: hidden;
}
.about-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-cta); opacity: 0; transition: opacity 0.3s ease;
}
.about-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.about-card:hover::before { opacity: 1; }
.about-card-icon {
  width: 48px; height: 48px; border-radius: var(--radius);
  background: var(--gradient-card); border: 1px solid var(--gray-200);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 20px;
}
.about-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--dark); }
.about-card p { font-size: 14px; line-height: 1.7; color: var(--gray-500); }

/* ===== Features Section ===== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  padding: 36px 32px; border-radius: var(--radius-lg);
  background: var(--dark-light); border: 1px solid rgba(255,255,255,0.08);
  transition: all 0.3s ease; position: relative; overflow: hidden;
}
.feature-card::after {
  content: ''; position: absolute; top: -50%; right: -50%;
  width: 100%; height: 100%;
  background: radial-gradient(circle, rgba(79,70,229,0.08) 0%, transparent 70%);
  opacity: 0; transition: opacity 0.3s ease;
}
.feature-card:hover { border-color: rgba(79,70,229,0.3); transform: translateY(-4px); }
.feature-card:hover::after { opacity: 1; }
.feature-card-icon {
  width: 52px; height: 52px; border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(79,70,229,0.15) 0%, rgba(6,182,212,0.15) 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 24px; position: relative; z-index: 1;
}
.feature-card h3 {
  font-size: 18px; font-weight: 700; color: var(--white);
  margin-bottom: 12px; position: relative; z-index: 1;
}
.feature-card p {
  font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55);
  position: relative; z-index: 1;
}

/* ===== Products Section ===== */
.products-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.product-card {
  padding: 40px 36px; border-radius: var(--radius-xl);
  background: var(--white); border: 1px solid var(--gray-200);
  transition: all 0.3s ease; position: relative; overflow: hidden;
}
.product-card:hover { box-shadow: var(--shadow-xl); transform: translateY(-4px); }
.product-card-badge {
  display: inline-block; padding: 4px 12px; border-radius: 100px;
  font-size: 12px; font-weight: 600; margin-bottom: 20px;
}
.product-card-badge.enterprise { background: rgba(79,70,229,0.1); color: var(--primary); }
.product-card-badge.quick { background: rgba(6,182,212,0.1); color: var(--accent); }
.product-card h3 { font-size: 24px; font-weight: 800; color: var(--dark); margin-bottom: 12px; letter-spacing: -0.01em; }
.product-card .subtitle { font-size: 15px; color: var(--gray-500); margin-bottom: 24px; line-height: 1.6; }
.product-card-features { margin-bottom: 28px; }
.product-card-features li {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 10px 0; font-size: 14px; color: var(--gray-600);
  border-bottom: 1px solid var(--gray-100);
}
.product-card-features li:last-child { border-bottom: none; }
.product-card-features .check {
  width: 20px; height: 20px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; margin-top: 2px;
}
.product-card-features .check.purple { background: rgba(79,70,229,0.1); color: var(--primary); }
.product-card-features .check.cyan { background: rgba(6,182,212,0.1); color: var(--accent); }
.product-card-actions { display: flex; gap: 12px; }
.btn-outline {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border-radius: var(--radius); font-size: 14px; font-weight: 600;
  border: 1px solid var(--gray-300); color: var(--gray-700); background: var(--white);
  cursor: pointer; transition: all 0.2s ease;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-solid {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border-radius: var(--radius); font-size: 14px; font-weight: 600;
  border: none; color: var(--white); background: var(--primary);
  cursor: pointer; transition: all 0.2s ease;
}
.btn-solid:hover { background: var(--primary-dark); }

/* ===== Partners Section ===== */
.partners-logos {
  display: flex; align-items: center; justify-content: center; gap: 60px;
  padding: 40px 0; flex-wrap: wrap;
}
.partners-logos img { height: 40px; width: auto; opacity: 0.7; transition: opacity 0.3s ease; filter: grayscale(100%); }
.partners-logos img:hover { opacity: 1; filter: grayscale(0%); }
.partner-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 48px; }
.partner-card {
  padding: 32px; border-radius: var(--radius-lg);
  background: var(--dark-light); border: 1px solid rgba(255,255,255,0.08);
}
.partner-card h4 { font-size: 16px; font-weight: 700; color: var(--white); margin-bottom: 12px; }
.partner-card p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); }

/* ===== CTA Section ===== */
.cta {
  padding: 100px 0; text-align: center;
  background: var(--gradient-hero); position: relative; overflow: hidden;
}
.cta::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 50%, rgba(79,70,229,0.2) 0%, transparent 70%);
  pointer-events: none;
}
.cta-content { position: relative; z-index: 1; }
.cta h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; color: var(--white); margin-bottom: 16px; letter-spacing: -0.02em; }
.cta p { font-size: 17px; color: rgba(255,255,255,0.6); margin-bottom: 36px; max-width: 560px; margin-left: auto; margin-right: auto; }

/* ===== Footer ===== */
.footer {
  padding: 60px 0 40px; background: var(--gray-900); color: rgba(255,255,255,0.5);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand p { font-size: 14px; line-height: 1.7; margin-top: 16px; max-width: 320px; }
.footer-col h4 { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: rgba(255,255,255,0.8); margin-bottom: 20px; }
.footer-col a { display: block; font-size: 14px; padding: 6px 0; color: rgba(255,255,255,0.5); transition: color 0.2s ease; }
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: space-between;
  font-size: 13px;
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .about-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}
@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-mobile-toggle { display: block; }
  .mobile-nav { display: block; }
  .hero { padding: 130px 0 70px; }
  .hero h1 { font-size: 28px; }
  .hero-desc { font-size: 15px; }
  .hero-stats { grid-template-columns: 1fr; gap: 16px; }
  .hero-stat { padding: 16px; }
  .hero-stat-number { font-size: 28px; }
  .trust-bar { padding: 32px 0; }
  .trust-bar-grid { flex-direction: column; gap: 24px; }
  .trust-divider { width: 48px; height: 1px; }
  .trust-number { font-size: 32px; }
  .section { padding: 70px 0; }
  .about-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .partner-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .partners-logos { gap: 32px; }
  .partners-logos img { height: 32px; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .product-card-actions { flex-direction: column; }
  .product-card-actions .btn { width: 100%; }
  .trust-number { font-size: 28px; }
}