/* StoreGo Pro 宣传页 — 原创样式，适配 Cloudflare Pages */

:root {
  --bg: #0f0f12;
  --bg-elevated: #18181c;
  --text: #e8e8ed;
  --text-muted: #9a9aa8;
  --accent: #f59e0b;
  --accent-hover: #fbbf24;
  --border: #2a2a32;
  --radius: 12px;
  --font-sans: "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "SF Pro Display", "PingFang SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(15, 15, 18, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
}

.logo:hover {
  color: var(--accent);
}

.site-header nav {
  display: flex;
  gap: 1.5rem;
}

.site-header nav a {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.site-header nav a:hover {
  color: var(--text);
}

/* Sections common */
.section-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 1.25rem;
}

section h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 2rem;
  text-align: center;
  color: var(--text);
}

/* Hero */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.25rem;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(245, 158, 11, 0.08) 0%, transparent 55%);
}

.hero-inner {
  max-width: 640px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  font-weight: 800;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.hero-tagline {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--text);
  margin: 0 0 0.5rem;
}

.hero-sub {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0 0 2rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--bg);
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.btn:hover {
  background: var(--accent-hover);
}

.btn:focus-visible {
  outline: 2px solid var(--accent-hover);
  outline-offset: 2px;
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* Features */
.features {
  background: var(--bg-elevated);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(245, 158, 11, 0.4);
}

.feature-icon {
  display: block;
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text);
}

.feature-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Flow */
.flow-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 2rem;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 180px;
}

.flow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--bg);
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.flow-text {
  color: var(--text);
  font-size: 0.9375rem;
}

.flow-note {
  text-align: center;
  margin: 2rem 0 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* Philosophy */
.philosophy {
  background: var(--bg-elevated);
}

.philosophy-quote {
  text-align: center;
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  font-weight: 600;
  color: var(--text);
  margin: 0;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

/* CTA */
.cta {
  text-align: center;
  padding: 4rem 1.25rem;
}

.cta p {
  color: var(--text-muted);
  margin: 0 0 1.5rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.25rem;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.footer-brand {
  font-weight: 700;
  font-size: 1rem;
  margin: 0 0 0.25rem;
  color: var(--text);
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0 0 1rem;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  margin: 0 0 1rem;
  font-size: 0.875rem;
}

.footer-links a {
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--text);
}

/* Legal pages (privacy, terms) */
.legal-page {
  padding: 2rem 0 4rem;
}

.legal-page .section-inner {
  max-width: 720px;
  padding: 0 1.25rem;
}

.legal-page h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2rem);
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text);
}

.legal-updated {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0 0 2rem;
}

.legal-page section {
  margin-bottom: 2rem;
}

.legal-page h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  text-align: left;
  color: var(--text);
}

.legal-page h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.25rem 0 0.5rem;
  color: var(--text);
}

.legal-page p,
.legal-page li {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0 0 0.75rem;
}

.legal-page ul {
  margin: 0 0 0.75rem;
  padding-left: 1.5rem;
}

.legal-page li {
  margin-bottom: 0.35rem;
}

.legal-page strong {
  color: var(--text);
}

/* Responsive */
@media (max-width: 640px) {
  .site-header nav {
    gap: 1rem;
  }

  .section-inner {
    padding: 2rem 1rem;
  }

  .flow-steps {
    flex-direction: column;
    align-items: center;
  }

  .flow-step {
    min-width: auto;
    width: 100%;
    max-width: 280px;
  }
}