/* Testory 官网 — site.css */
:root {
  --bg-deep: #050816;
  --bg-card: rgba(15, 23, 42, 0.55);
  --bg-card-hover: rgba(30, 41, 59, 0.65);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --primary: #818cf8;
  --primary-bright: #a5b4fc;
  --accent-cyan: #22d3ee;
  --accent-violet: #c084fc;
  --accent-emerald: #34d399;
  --gradient-hero: linear-gradient(135deg, #6366f1 0%, #8b5cf6 40%, #06b6d4 100%);
  --gradient-text: linear-gradient(120deg, #e0e7ff, #c4b5fd, #67e8f9);
  --border: rgba(148, 163, 184, 0.12);
  --border-bright: rgba(129, 140, 248, 0.35);
  --radius: 16px;
  --radius-sm: 10px;
  --nav-h: 72px;
  --font-display: "Outfit", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "DM Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-glow: 0 0 80px rgba(99, 102, 241, 0.25);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-deep);
  overflow-x: hidden;
  line-height: 1.6;
}

/* 背景光晕 */
.bg-canvas {
  position: fixed;
  inset: 0;
  z-index: -2;
  background: var(--bg-deep);
  overflow: hidden;
}
.bg-canvas::before {
  content: "";
  position: absolute;
  width: 140%;
  height: 140%;
  top: -30%;
  left: -20%;
  background:
    radial-gradient(ellipse 50% 40% at 20% 20%, rgba(99, 102, 241, 0.22), transparent 55%),
    radial-gradient(ellipse 45% 35% at 80% 10%, rgba(139, 92, 246, 0.18), transparent 50%),
    radial-gradient(ellipse 40% 30% at 60% 80%, rgba(6, 182, 212, 0.12), transparent 55%);
  animation: aurora 18s ease-in-out infinite alternate;
}
@keyframes aurora {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-3%, 2%) rotate(2deg); }
}
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  z-index: -1;
  pointer-events: none;
  animation: float 12s ease-in-out infinite;
}
.orb-1 { width: 420px; height: 420px; background: #4f46e5; top: 10%; left: -8%; animation-delay: 0s; }
.orb-2 { width: 320px; height: 320px; background: #7c3aed; top: 50%; right: -5%; animation-delay: -4s; }
.orb-3 { width: 280px; height: 280px; background: #0891b2; bottom: 5%; left: 30%; animation-delay: -8s; }
@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -30px); }
}

/* 网格纹理 */
.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  width: min(1140px, calc(100% - 2.5rem));
  margin: 0 auto;
}

/* ---------- 导航 ---------- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.35s var(--ease-out), box-shadow 0.35s, backdrop-filter 0.35s;
}
.site-nav.scrolled {
  background: rgba(5, 8, 22, 0.75);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  width: min(1140px, calc(100% - 2.5rem));
  margin: 0 auto;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.nav-brand .logo,
.nav-brand .nav-logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  flex-shrink: 0;
}
.nav-brand .logo {
  background: var(--gradient-hero);
  display: grid;
  place-items: center;
  font-size: 1rem;
  font-weight: 800;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}
.nav-links {
  display: flex;
  gap: 0.25rem;
  flex: 1;
}
.nav-links a {
  padding: 0.45rem 0.85rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-actions { display: flex; gap: 0.65rem; align-items: center; margin-left: auto; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s, background 0.25s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--gradient-hero);
  color: #fff;
  box-shadow: 0 4px 24px rgba(99, 102, 241, 0.45);
}
.btn-primary:hover {
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.55);
  transform: translateY(-2px);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-bright);
}
.btn-lg { padding: 0.95rem 1.75rem; font-size: 1rem; }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 3rem) 0 4rem;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem 0.35rem 0.5rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(129, 140, 248, 0.25);
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--primary-bright);
  margin-bottom: 1.25rem;
  animation: fadeUp 0.8s var(--ease-out) both;
}
.hero-badge .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 12px var(--accent-emerald);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.2vw, 3.25rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin: 0 0 1.25rem;
  animation: fadeUp 0.8s 0.1s var(--ease-out) both;
}
.hero h1 .gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
  white-space: nowrap;
  font-size: 0.82em;
  letter-spacing: -0.02em;
}
@media (max-width: 480px) {
  .hero h1 .gradient {
    font-size: 0.72em;
    letter-spacing: -0.03em;
  }
}
.hero-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 32rem;
  margin: 0 0 2rem;
  animation: fadeUp 0.8s 0.2s var(--ease-out) both;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  animation: fadeUp 0.8s 0.3s var(--ease-out) both;
}
.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2.5rem;
  animation: fadeUp 0.8s 0.4s var(--ease-out) both;
}
.hero-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}
.hero-stat span { font-size: 0.8125rem; color: var(--text-dim); }

/* Hero 视觉 */
.hero-visual {
  position: relative;
  animation: fadeUp 1s 0.2s var(--ease-out) both;
}
.hero-mock {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  overflow: hidden;
  box-shadow: var(--shadow-glow), 0 24px 64px rgba(0,0,0,0.4);
  transform: perspective(1200px) rotateY(-6deg) rotateX(4deg);
  transition: transform 0.6s var(--ease-out);
}
.hero-mock:hover { transform: perspective(1200px) rotateY(0) rotateX(0); }
.mock-bar {
  display: flex;
  gap: 6px;
  padding: 12px 16px;
  background: rgba(0,0,0,0.3);
  border-bottom: 1px solid var(--border);
}
.mock-bar span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(148,163,184,0.3);
}
.mock-bar span:nth-child(1) { background: #f87171; }
.mock-bar span:nth-child(2) { background: #fbbf24; }
.mock-bar span:nth-child(3) { background: #34d399; }
.mock-body { padding: 1.25rem; }
.mock-row {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  align-items: center;
}
.mock-chip {
  height: 28px;
  border-radius: 6px;
  background: rgba(99, 102, 241, 0.2);
  flex: 1;
}
.mock-chip.w40 { flex: 0.4; }
.mock-chip.w60 { flex: 0.6; }
.mock-chip.accent { background: linear-gradient(90deg, rgba(34,211,238,0.25), rgba(129,140,248,0.25)); }
.mock-line {
  height: 8px;
  border-radius: 4px;
  background: rgba(148,163,184,0.12);
  margin-bottom: 0.5rem;
}
.mock-line:last-child { width: 70%; }
.float-card {
  position: absolute;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  font-size: 0.8125rem;
  box-shadow: 0 12px 32px rgba(0,0,0,0.3);
  animation: floatCard 6s ease-in-out infinite;
}
.float-card-1 { top: -12px; right: -20px; animation-delay: 0s; }
.float-card-2 { bottom: 20px; left: -24px; animation-delay: -3s; }
.float-card .label { color: var(--accent-emerald); font-weight: 600; }
@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Section 通用 ---------- */
.section {
  padding: 6rem 0;
  position: relative;
}
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3.5rem;
}
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}
.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}
.section-header p { color: var(--text-muted); margin: 0; font-size: 1.05rem; }

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 特性网格 ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.feature-card {
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  transition: transform 0.35s var(--ease-out), border-color 0.35s, background 0.35s;
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-bright);
  background: var(--bg-card-hover);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
}
.feature-icon.purple { background: rgba(129, 140, 248, 0.15); }
.feature-icon.cyan { background: rgba(34, 211, 238, 0.12); }
.feature-icon.emerald { background: rgba(52, 211, 153, 0.12); }
.feature-icon.rose { background: rgba(251, 113, 133, 0.12); }
.feature-icon.amber { background: rgba(251, 191, 36, 0.12); }
.feature-icon.violet { background: rgba(192, 132, 252, 0.12); }
.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}
.feature-card p { margin: 0; font-size: 0.9rem; color: var(--text-muted); line-height: 1.55; }

/* ---------- 产品展示 Tabs ---------- */
.showcase-wrap {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  align-items: start;
}
.showcase-tabs { display: flex; flex-direction: column; gap: 0.5rem; }
.tab-btn {
  text-align: left;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.95rem;
  transition: all 0.25s;
}
.tab-btn:hover { background: rgba(255,255,255,0.04); color: var(--text); }
.tab-btn.active {
  background: rgba(99, 102, 241, 0.12);
  border-color: var(--border-bright);
  color: var(--text);
}
.tab-btn strong { display: block; font-weight: 600; margin-bottom: 0.2rem; }
.tab-btn span { font-size: 0.8125rem; opacity: 0.8; }
.showcase-panel {
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  min-height: 320px;
}
.showcase-panel h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 0.75rem;
}
.showcase-panel p { color: var(--text-muted); margin: 0 0 1.25rem; }
.showcase-list { list-style: none; padding: 0; margin: 0; }
.showcase-list li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.showcase-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}
.tab-content { display: none; animation: fadeIn 0.4s var(--ease-out); }
.tab-content.active { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateX(12px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ---------- 流程 ---------- */
.steps-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  counter-reset: step;
}
.step-card {
  text-align: center;
  padding: 2rem 1.5rem;
  position: relative;
}
.step-card::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0.5;
  margin-bottom: 1rem;
}
.step-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
}
.step-card p { margin: 0; font-size: 0.9rem; color: var(--text-muted); }

/* ---------- 定价 ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  align-items: stretch;
}
.price-card {
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: transform 0.35s var(--ease-out);
}
.price-card:hover { transform: translateY(-4px); }
.price-card.featured {
  border-color: var(--border-bright);
  background: linear-gradient(180deg, rgba(99,102,241,0.12) 0%, var(--bg-card) 40%);
  box-shadow: var(--shadow-glow);
  transform: scale(1.03);
}
.price-card.featured:hover { transform: scale(1.03) translateY(-4px); }
.price-badge {
  align-self: flex-start;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: var(--gradient-hero);
  margin-bottom: 1rem;
}
.price-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0 0 0.25rem;
}
.price-card .desc { font-size: 0.875rem; color: var(--text-dim); margin-bottom: 1.25rem; }
.price-amount {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}
.price-amount small { font-size: 0.875rem; font-weight: 500; color: var(--text-dim); }
.price-features {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  flex: 1;
}
.price-features li {
  padding: 0.4rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-left: 1.35rem;
  position: relative;
}
.price-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-emerald);
  font-weight: 700;
}
.price-features li.off { opacity: 0.45; }
.price-features li.off::before { content: "—"; color: var(--text-dim); }

/* ---------- 下载 ---------- */
.download-section {
  text-align: center;
  padding: 4rem 2rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(6,182,212,0.08));
  border: 1px solid var(--border-bright);
  position: relative;
  overflow: hidden;
}
.download-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(129,140,248,0.2), transparent 60%);
  pointer-events: none;
}
.download-section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 0.75rem;
  position: relative;
}
.download-section p { color: var(--text-muted); margin: 0 0 1.75rem; position: relative; }
.download-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  position: relative;
}
.download-lead {
  max-width: 36rem;
  margin-left: auto !important;
  margin-right: auto !important;
}
.download-alert {
  color: #fca5a5 !important;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  max-width: 32rem;
  margin: 0 auto 1.25rem !important;
  font-size: 0.9rem;
}
.download-hint {
  margin-top: 0.75rem !important;
  margin-bottom: 0 !important;
  font-size: 0.875rem;
  color: var(--text-dim);
}
.download-btn { position: relative; }
.download-meta {
  margin-top: 1.25rem;
  font-size: 0.8125rem;
  color: var(--text-dim);
  position: relative;
}

/* ---------- FAQ ---------- */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-q {
  width: 100%;
  text-align: left;
  padding: 1.25rem 0;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq-q::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--primary);
  transition: transform 0.3s;
}
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out), padding 0.3s;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}
.faq-item.open .faq-a { max-height: 200px; padding-bottom: 1.25rem; }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2.5rem;
  align-items: start;
}
.contact-info h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 1rem;
}
.contact-info p { color: var(--text-muted); margin: 0 0 1.5rem; }
.contact-detail {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}
.contact-detail a { color: var(--primary-bright); }
.contact-detail a:hover { text-decoration: underline; }
.contact-form {
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.form-row { margin-bottom: 1.1rem; }
.form-row label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}
.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--border-bright);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}
.form-row textarea { min-height: 120px; resize: vertical; }
.form-msg {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  min-height: 1.25rem;
}
.form-msg.success { color: var(--accent-emerald); }
.form-msg.error { color: #f87171; }

/* ---------- Footer ---------- */
.site-footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer-brand p { color: var(--text-dim); font-size: 0.875rem; max-width: 280px; margin: 0.75rem 0 0; }
.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0 0 1rem;
}
.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-dim);
  padding: 0.25rem 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--primary-bright); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--text-dim);
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-cta, .hero-stats { justify-content: center; }
  .hero-visual { order: -1; max-width: 480px; margin: 0 auto; }
  .hero-mock { transform: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-wrap { grid-template-columns: 1fr; }
  .showcase-tabs { flex-direction: row; flex-wrap: wrap; }
  .steps-row, .pricing-grid { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links, .nav-actions .btn-ghost { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(5, 8, 22, 0.95);
    backdrop-filter: blur(16px);
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }
  .features-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 1rem; align-items: center; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- 文档页面 ---------- */
.docs-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 2rem;
  padding-top: calc(var(--nav-h) + 2rem);
  min-height: 100vh;
}

.docs-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 1rem);
  align-self: start;
  max-height: calc(100vh - var(--nav-h) - 2rem);
  overflow-y: auto;
  padding: 1rem 0;
}

.docs-sidebar-inner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  backdrop-filter: blur(8px);
}

.docs-sidebar-title {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.docs-nav {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.docs-nav-link {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-radius: 8px;
  transition: all 0.2s;
}

.docs-nav-link:hover {
  color: var(--text);
  background: rgba(129, 140, 248, 0.1);
}

.docs-nav-link.active {
  color: var(--primary-bright);
  background: rgba(129, 140, 248, 0.15);
}

.docs-content {
  min-width: 0;
  padding-bottom: 3rem;
}

.docs-hero {
  text-align: center;
  padding: 3rem 0 4rem;
}

.docs-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0.75rem 0 1rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.docs-lead {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 36rem;
  margin: 0 auto 2rem;
}

.docs-quick-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  background: rgba(129, 140, 248, 0.12);
  border: 1px solid rgba(129, 140, 248, 0.25);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary-bright);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}

.section-header {
  margin-bottom: 1.5rem;
}

.section-header h2,
.section-header h3 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.02em;
}

.section-header h3 { font-size: 1.5rem; }

.docs-section {
  padding: 2rem 0;
}

.docs-section h2 {
  scroll-margin-top: calc(var(--nav-h) + 1rem);
}

.docs-section h3 {
  scroll-margin-top: calc(var(--nav-h) + 1rem);
}

.docs-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
  transition: border-color 0.3s;
}

.docs-card:hover {
  border-color: var(--border-bright);
}

.docs-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 1rem;
}

.docs-card h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.docs-card p {
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.7;
  margin: 0 0 0.75rem;
}

.docs-card ul,
.docs-card ol {
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.8;
  padding-left: 1.25rem;
  margin: 0 0 0.75rem;
}

.docs-card li {
  margin-bottom: 0.35rem;
}

.docs-card strong {
  color: var(--text);
  font-weight: 600;
}

.docs-card code {
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary-bright);
  padding: 0.15rem 0.4rem;
  border-radius: 5px;
  font-size: 0.85em;
  font-family: "SF Mono", "Consolas", monospace;
}

.steps-list {
  list-style: none;
  padding: 0 !important;
  counter-reset: step;
}

.steps-list li {
  counter-increment: step;
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 1.25rem;
}

.steps-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: var(--gradient-hero);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
}

.notice {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  margin: 1rem 0;
  font-size: 0.9rem;
  line-height: 1.6;
  border-left: 3px solid;
}

.notice.info {
  background: rgba(59, 130, 246, 0.1);
  border-color: #3b82f6;
  color: #93c5fd;
}

.notice.warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: #f59e0b;
  color: #fcd34d;
}

.notice strong {
  color: inherit;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 1rem 0;
}

.feature-mini-card {
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
}

.feature-mini-card h5 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.feature-mini-card ol {
  padding-left: 1.25rem;
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.component-grid {
  display: grid;
  gap: 1rem;
  margin: 1rem 0;
}

.component-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.component-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.component-info h4 {
  margin: 0 0 0.35rem !important;
  font-size: 1rem;
}

.component-info p {
  margin: 0 0 0.35rem !important;
  font-size: 0.85rem;
}

.component-size {
  font-size: 0.8rem !important;
  color: var(--text-dim) !important;
  margin: 0 !important;
}

@media (max-width: 960px) {
  .docs-layout {
    grid-template-columns: 1fr;
  }
  .docs-sidebar {
    position: static;
    max-height: none;
    padding: 0;
  }
  .feature-grid { grid-template-columns: 1fr; }
}

.docs-page .site-nav .nav-links a[href*="docs"] {
  color: var(--text);
  background: rgba(255,255,255,0.06);
}