:root {
  --chrome: #4285f4;
  --edge: #5c2d91;
  --firefox: #e66000;
  --bg: #f8fafc;
  --ink: #1e293b;
  --muted: #475569;
  --line: #e2e8f0;
  --paper: #fff;
}

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

html {
  scroll-behavior: auto;
}

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

svg {
  display: block;
}

a {
  color: #1d4ed8;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(1160px, calc(100% - 28px));
  margin: 0 auto;
}

.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand svg {
  width: 28px;
  height: 28px;
  color: #0f766e;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 14px;
}

.hero {
  padding: 36px 0 8px;
}

.hero h1 {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.35;
  margin-bottom: 12px;
}

.hero p {
  max-width: 48em;
  margin-bottom: 8px;
  color: var(--muted);
}

.section {
  padding: 32px 0;
}

.section h2 {
  font-size: 22px;
  margin-bottom: 14px;
}

.lead {
  margin-bottom: 16px;
  color: var(--muted);
}

.browser-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 8px;
}

.browser-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 0 0 10px 10px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
}

.tabbar {
  display: flex;
  align-items: flex-end;
  height: 36px;
  padding: 0 10px;
  border-radius: 10px 10px 0 0;
}

.tabbar.chrome {
  background: #d2e3fc;
}

.tabbar.edge {
  background: #ede4f5;
}

.tabbar.firefox {
  background: #ffe4d1;
}

.fake-tab {
  height: 28px;
  padding: 0 14px;
  border-radius: 8px 8px 0 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
}

.chrome .fake-tab {
  background: var(--chrome);
}

.edge .fake-tab {
  background: var(--edge);
}

.firefox .fake-tab {
  background: var(--firefox);
}

.fake-tab svg {
  width: 14px;
  height: 14px;
}

.browser-body {
  padding: 16px;
}

.browser-body h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.browser-body p + p {
  margin-top: 8px;
}

.table-scroll {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper);
  font-size: 14px;
}

th,
td {
  border: 1px solid var(--line);
  padding: 11px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f1f5f9;
}

th.col-chrome {
  color: var(--chrome);
}

th.col-edge {
  color: var(--edge);
}

th.col-firefox {
  color: var(--firefox);
}

.deep {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 16px;
  margin-bottom: 12px;
}

.deep-mark {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
}

.deep-mark.chrome {
  background: var(--chrome);
}

.deep-mark.edge {
  background: var(--edge);
}

.deep-mark.firefox {
  background: var(--firefox);
}

.deep h3 {
  margin-bottom: 8px;
}

.pick {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

.pick article {
  background: var(--paper);
  border-top: 6px solid #94a3b8;
  padding: 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.pick article:nth-child(1) {
  border-top-color: var(--chrome);
}

.pick article:nth-child(2) {
  border-top-color: var(--edge);
}

.pick article:nth-child(3) {
  border-top-color: var(--firefox);
}

.pick h3 {
  margin-bottom: 8px;
}

.tray {
  background: #0f172a;
  color: #e2e8f0;
  padding: 18px;
}

.tray h3 {
  color: #fff;
  margin-bottom: 8px;
}

.tray ul {
  padding-left: 18px;
}

.tray li {
  margin-bottom: 8px;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.faq-card {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 16px;
}

.faq-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
  line-height: 1.5;
}

.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 28px 0 36px;
  font-size: 14px;
}

.site-footer p {
  margin-bottom: 8px;
}

@media (max-width: 900px) {
  .header-row {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
  }

  .browser-grid,
  .pick,
  .faq-grid {
    grid-template-columns: 1fr;
  }

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