:root {
  --ink: #172033;
  --muted: #637083;
  --line: #dfe5ec;
  --bg: #f7f9fc;
  --panel: #ffffff;
  --blue: #2563eb;
  --green: #0f9f6e;
  --rose: #d9487f;
  --amber: #c77700;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: 1120px;
  margin: 0 auto;
  min-height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0;
  color: var(--blue);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  color: var(--muted);
}

.nav-links a {
  text-decoration: none;
}

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

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 56px 24px 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 36px;
  align-items: center;
  padding: 24px 0 44px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.12;
  letter-spacing: 0;
}

.title-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.app-icon {
  width: 72px;
  height: 72px;
  flex: 0 0 auto;
  border-radius: 16px;
  box-shadow: 0 12px 28px rgba(23, 32, 51, 0.16);
}

.lead {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
  max-width: 680px;
}

.hero-media img,
.tool-image img,
.detail-visual img {
  display: block;
  width: 100%;
  height: auto;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.button.primary {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}

.button.disabled {
  color: #7a8494;
  background: #eef2f7;
  border-color: #d8e0ea;
  cursor: not-allowed;
}

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

.button.disabled:hover {
  transform: none;
}

.section-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin: 32px 0 20px;
}

.section-title h2 {
  margin: 0;
  font-size: 24px;
}

.section-title p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  text-decoration: none;
  box-shadow: 0 12px 32px rgba(23, 32, 51, 0.05);
}

.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 42px rgba(23, 32, 51, 0.1);
}

.tool-body {
  padding: 18px;
}

.tool-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.tool-type {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.status {
  font-size: 12px;
  font-weight: 700;
  color: var(--green);
}

.tool-body h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.tool-body p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 14px;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 34px;
  align-items: start;
  margin-top: 28px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
}

.panel h2 {
  margin: 0 0 14px;
  font-size: 22px;
}

.panel h3 {
  margin: 24px 0 10px;
  font-size: 18px;
}

.panel p,
.panel li {
  color: var(--muted);
  line-height: 1.8;
}

.panel ul,
.panel ol {
  padding-left: 20px;
}

.notice {
  margin-top: 22px;
  padding: 14px 16px;
  border: 1px solid #f2c166;
  border-radius: 8px;
  background: #fff7e6;
  color: #6b4a00;
  line-height: 1.75;
}

.code {
  overflow-x: auto;
  padding: 14px 16px;
  border-radius: 8px;
  background: #101827;
  color: #e7eefc;
  line-height: 1.7;
  font-size: 13px;
}

.facts {
  display: grid;
  gap: 10px;
}

.fact {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.fact strong {
  color: var(--ink);
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px 36px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

@media (max-width: 860px) {
  .hero,
  .detail-layout {
    grid-template-columns: 1fr;
  }

  .hero-media,
  .detail-visual {
    max-width: 420px;
  }

  .tool-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    display: block;
  }
}

@media (max-width: 560px) {
  .nav {
    display: block;
    padding: 16px 20px;
  }

  .nav-links {
    margin-top: 10px;
    flex-wrap: wrap;
  }

  .page {
    padding: 36px 18px 56px;
  }

  .app-icon {
    width: 56px;
    height: 56px;
  }
}