/* ============================================================
   开源榜 HotRepo · 官网样式
   黑白灰为主，蓝色为品牌强调色
   ============================================================ */

:root {
  --bg: #ffffff;
  --bg-alt: #f7f8fa;
  --bg-elev: #ffffff;
  --text: #1d1d1f;
  --text-soft: #4b5563;
  --text-mute: #6b7280;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --accent: #2563eb;
  --accent-soft: #eff4ff;
  --accent-strong: #1d4ed8;
  --dark: #0b1220;
  --dark-soft: #111827;
  --code-bg: #f3f4f6;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 6px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --container: 1180px;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --bg-alt: #111827;
    --bg-elev: #0f172a;
    --text: #f3f4f6;
    --text-soft: #cbd5e1;
    --text-mute: #94a3b8;
    --border: #1f2937;
    --border-strong: #334155;
    --accent: #60a5fa;
    --accent-soft: rgba(96, 165, 250, 0.12);
    --accent-strong: #3b82f6;
    --dark: #050810;
    --dark-soft: #0b1220;
    --code-bg: #1e293b;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Navbar ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
@media (prefers-color-scheme: dark) {
  .navbar { background: rgba(11, 18, 32, 0.85); }
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 17px;
}
.brand-name { letter-spacing: -0.01em; }
.brand-en { color: var(--text-mute); font-weight: 500; }

.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  color: var(--text-soft);
  font-size: 14.5px;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }

.nav-actions { display: flex; gap: 10px; align-items: center; }

.primary-btn, .ghost-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14.5px;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.primary-btn {
  background: var(--accent);
  color: #fff !important;
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.primary-btn:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: #fff !important;
}

.ghost-btn {
  background: transparent;
  color: var(--text) !important;
  border-color: var(--border-strong);
}
.ghost-btn:hover {
  background: var(--bg-alt);
  color: var(--text) !important;
}

.primary-btn.lg, .ghost-btn.lg {
  padding: 13px 22px;
  font-size: 15.5px;
}

/* ===== Hero ===== */
.hero {
  padding: 80px 0 96px;
  background:
    radial-gradient(1200px 600px at 80% -10%, var(--accent-soft), transparent 60%),
    radial-gradient(800px 400px at -10% 30%, var(--accent-soft), transparent 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
}

.badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.1;
  margin: 0 0 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.hero h1 .hl {
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  font-size: 18px;
  color: var(--text-soft);
  margin: 0 0 32px;
  max-width: 540px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-meta {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 540px;
}
.hero-meta li {
  display: flex;
  flex-direction: column;
  border-left: 2px solid var(--border-strong);
  padding-left: 14px;
}
.hero-meta strong {
  font-size: 30px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}
.hero-meta span {
  font-size: 13px;
  color: var(--text-mute);
  margin-top: 2px;
}

/* Hero visual: phone mockup */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 520px;
}

.phone-frame {
  width: 290px;
  height: 580px;
  background: var(--dark);
  border-radius: 38px;
  padding: 12px;
  box-shadow: var(--shadow-lg);
  position: relative;
  border: 1px solid var(--border-strong);
}

.phone-notch {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 22px;
  background: var(--dark);
  border-radius: 12px;
  z-index: 2;
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 28px;
  object-fit: cover;
  background: #fff;
}

.float-card {
  position: absolute;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-md);
  font-size: 13px;
  z-index: 3;
}
.card-1 { top: 60px; left: -10px; max-width: 240px; }
.card-2 { bottom: 80px; right: -20px; max-width: 200px; flex-direction: column; align-items: flex-start; gap: 4px; }
.float-card .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: #10b981; flex-shrink: 0;
}
.card-title { font-weight: 600; color: var(--text); }
.card-meta { color: var(--text-mute); font-size: 12px; margin-top: 2px; }

/* ===== Data strip ===== */
.strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 20px 0;
}
.strip-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.strip-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.strip-logos { display: flex; flex-wrap: wrap; gap: 10px; }
.logo-chip {
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-soft);
}

/* ===== Sections ===== */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  margin: 0 0 14px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-head p {
  font-size: 17px;
  color: var(--text-soft);
  margin: 0;
}

/* ===== Features ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.feature-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-card h3 {
  font-size: 19px;
  margin: 0 0 8px;
  font-weight: 700;
}
.feature-card p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14.5px;
}

/* ===== Preview ===== */
.preview-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.preview-shot {
  margin: 0;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  transition: all var(--transition);
}
.preview-shot:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.preview-shot img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.preview-shot figcaption {
  margin-top: 14px;
  font-size: 14px;
  color: var(--text-soft);
  font-weight: 500;
}

/* ===== Steps ===== */
.step-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.step {
  position: relative;
  padding: 32px 28px 28px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.step-num {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.step h3 {
  font-size: 19px;
  margin: 0 0 8px;
  font-weight: 700;
}
.step p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14.5px;
}

/* ===== Stack ===== */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.stack-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
}
.stack-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--dark);
  color: #fff;
  margin-bottom: 14px;
}
.stack-card h3 {
  font-size: 19px;
  margin: 0 0 10px;
  font-weight: 700;
}
.stack-card p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14.5px;
}

/* ===== Download ===== */
.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 32px;
}
.store-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 24px;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text) !important;
  transition: all var(--transition);
  position: relative;
}
.store-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  color: var(--text) !important;
}
.store-icon {
  width: 52px; height: 52px;
  background: var(--dark);
  color: #fff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.store-icon svg { width: 28px; height: 28px; }
.store-card.ios .store-icon { background: linear-gradient(135deg, #1d1d1f, #4b5563); }
.store-card.harmony .store-icon { background: linear-gradient(135deg, #c8102e, #ff4d4f); }

.store-text { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.store-eyebrow { font-size: 12px; color: var(--text-mute); letter-spacing: 0.04em; }
.store-name { font-size: 22px; font-weight: 800; color: var(--text); letter-spacing: -0.01em; }
.store-meta { font-size: 12px; color: var(--text-mute); margin-top: 2px; }
.store-arrow {
  font-size: 22px;
  color: var(--text-mute);
  transition: transform var(--transition);
}
.store-card:hover .store-arrow { transform: translateX(4px); color: var(--accent); }

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  justify-content: center;
  padding-top: 24px;
  border-top: 1px dashed var(--border-strong);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-soft);
}
.meta-label {
  font-weight: 600;
  color: var(--text-mute);
}

/* ===== CTA band ===== */
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  box-shadow: var(--shadow-sm);
}
.cta-band h2 {
  font-size: 26px;
  margin: 0 0 6px;
  font-weight: 800;
}
.cta-band p { margin: 0; color: var(--text-soft); }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 36px 0 48px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  text-align: center;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
}
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a {
  color: var(--text-soft);
  font-size: 14px;
}
.footer-links a:hover { color: var(--text); }
.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--text-mute);
}

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .hero { padding: 56px 0 64px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { min-height: auto; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .preview-row { grid-template-columns: repeat(2, 1fr); }
  .step-grid { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 32px; flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .preview-row { grid-template-columns: 1fr; }
  .hero-meta { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .phone-frame { width: 240px; height: 480px; }
  .float-card.card-1 { display: none; }
  .float-card.card-2 { right: 0; bottom: 30px; }
}