* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0b1020;
  --bg-soft: #111a33;
  --card: #151f3d;
  --border: #26345c;
  --text: #e8edf9;
  --text-muted: #9aa7cc;
  --accent: #5b8cff;
  --accent-strong: #7aa2ff;
  --good: #34d399;
  --bad: #f87171;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

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

code {
  background: rgba(91, 140, 255, 0.12);
  border: 1px solid rgba(91, 140, 255, 0.25);
  border-radius: 5px;
  padding: 0.1em 0.4em;
  font-size: 0.92em;
  color: var(--accent-strong);
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
}

.hero {
  background: radial-gradient(1200px 600px at 80% -10%, rgba(91, 140, 255, 0.22), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(52, 211, 153, 0.12), transparent 60%);
  border-bottom: 1px solid var(--border);
  padding-bottom: 72px;
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.brand-icon {
  font-size: 20px;
}

.nav-links {
  display: flex;
  gap: 22px;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 14px;
  transition: color 0.2s;
}

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

.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 24px 0;
}

.eyebrow {
  color: var(--accent-strong);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero-inner h1 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  max-width: 720px;
  margin-bottom: 16px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 640px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  border-radius: 10px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fff;
  box-shadow: 0 6px 20px rgba(91, 140, 255, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 8px 26px rgba(91, 140, 255, 0.45);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 24px;
}

section {
  margin-bottom: 72px;
}

section h2 {
  font-size: clamp(22px, 3vw, 30px);
  margin-bottom: 28px;
  position: relative;
  padding-left: 16px;
}

section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 5px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.card-icon {
  font-size: 30px;
  margin-bottom: 14px;
}

.card h2 {
  font-size: 19px;
  margin-bottom: 10px;
  padding-left: 0;
}

.card h2::before {
  display: none;
}

.card p {
  color: var(--text-muted);
  font-size: 14.5px;
}

.steps ol {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.steps li {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
}

.step-num {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
}

.steps h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.steps p {
  color: var(--text-muted);
  font-size: 14.5px;
}

.risk-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 14px;
}

.risk-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  background: var(--bg-soft);
}

.risk-tag {
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 700;
  border-radius: 6px;
  padding: 3px 10px;
  color: #fff;
}

.risk-bad .risk-tag {
  background: var(--bad);
}

.risk-good .risk-tag {
  background: var(--good);
}

.risk-item p {
  font-size: 14.5px;
  color: var(--text);
}

.tool-desc {
  color: var(--text-muted);
  margin-bottom: 20px;
  max-width: 640px;
}

.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}

.key-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.key-form input,
.key-form select {
  flex: 1;
  min-width: 200px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 14.5px;
  outline: none;
  transition: border-color 0.2s;
}

.key-form select {
  flex: 0 0 auto;
  min-width: 110px;
}

.key-form input:focus,
.key-form select:focus {
  border-color: var(--accent);
}

.key-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-soft);
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.key-info {
  flex: 1;
  min-width: 180px;
}

.key-name {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 2px;
}

.key-meta {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.key-value {
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
  font-size: 13.5px;
  color: var(--accent-strong);
  background: rgba(91, 140, 255, 0.1);
  border: 1px solid rgba(91, 140, 255, 0.2);
  border-radius: 8px;
  padding: 8px 12px;
  max-width: 100%;
  overflow-x: auto;
  white-space: nowrap;
}

.key-actions {
  display: flex;
  gap: 8px;
}

.key-actions button {
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.key-actions .copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.key-actions .delete-btn:hover {
  border-color: var(--bad);
  color: var(--bad);
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 30px 0;
  border: 1px dashed var(--border);
  border-radius: 12px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-soft);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  background: none;
  border: none;
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.faq-toggle {
  font-size: 22px;
  color: var(--accent-strong);
  transition: transform 0.25s;
  line-height: 1;
}

.faq-item.open .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  padding: 0 22px 18px;
  color: var(--text-muted);
  font-size: 14.5px;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%) translateY(20px);
  background: var(--card);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 12px 22px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  font-size: 14.5px;
  z-index: 100;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 640px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-inner {
    padding-top: 36px;
  }

  .key-item {
    flex-direction: column;
    align-items: stretch;
  }
}