:root {
  --extension-bg: #070b12;
  --extension-surface: #0f1722;
  --extension-surface-raised: #141f2c;
  --extension-line: rgba(154, 175, 197, .18);
  --extension-ink: #f3f7fb;
  --extension-muted: #98a7b8;
  --extension-soft: #c5d1df;
  --extension-accent: #00d8ee;
  --extension-green: #35c995;
  --extension-gold: #d6a94a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--extension-bg); }
body { margin: 0; min-height: 100vh; color: var(--extension-ink); background: var(--extension-bg); font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
code, kbd { font-family: Consolas, "SFMono-Regular", monospace; }
code { color: #a7eaf0; }
kbd { display: inline-block; border: 1px solid var(--extension-line); border-radius: 4px; padding: 2px 5px; color: var(--extension-soft); background: rgba(255,255,255,.05); font-size: 11px; }

.extension-page { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.extension-hero { min-height: 560px; display: grid; grid-template-columns: minmax(0, .92fr) minmax(420px, 1.08fr); gap: 42px; align-items: center; padding: 64px 0 58px; }
.extension-eyebrow { margin: 0 0 12px; color: var(--extension-accent); font-size: 11px; font-weight: 850; letter-spacing: .14em; }
.extension-hero h1 { max-width: 600px; margin: 0; font-size: clamp(38px, 5vw, 66px); line-height: 1.08; letter-spacing: 0; }
.extension-hero-lead { max-width: 580px; margin: 22px 0 0; color: var(--extension-soft); font-size: 18px; line-height: 1.8; }
.extension-hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.extension-primary-action, .extension-secondary-action { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border-radius: 7px; padding: 0 17px; font-size: 13px; font-weight: 850; text-decoration: none; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.extension-primary-action { border: 1px solid rgba(0,216,238,.62); color: #03151a; background: var(--extension-accent); box-shadow: 0 12px 30px rgba(0,216,238,.12); }
.extension-primary-action:hover { transform: translateY(-2px); background: #35e4f2; }
.extension-primary-action small { opacity: .7; font-size: 11px; }
.extension-secondary-action { border: 1px solid var(--extension-line); color: var(--extension-soft); background: rgba(255,255,255,.035); }
.extension-secondary-action:hover { transform: translateY(-2px); border-color: rgba(0,216,238,.5); background: rgba(0,216,238,.08); }
.extension-icon-download { width: 16px; height: 16px; display: inline-block; background: currentColor; -webkit-mask: url("/icons/download.svg") center / contain no-repeat; mask: url("/icons/download.svg") center / contain no-repeat; }
.extension-release-strip { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 20px; color: var(--extension-muted); font-size: 11px; }
.extension-release-strip span + span { padding-left: 18px; border-left: 1px solid var(--extension-line); }
.extension-release-strip strong { color: var(--extension-ink); }

.extension-hero-visual { position: relative; min-height: 390px; display: grid; place-items: center; }
.extension-glow { position: absolute; width: 310px; height: 260px; border-radius: 50%; background: rgba(0,216,238,.16); filter: blur(70px); }
.extension-window { position: relative; z-index: 1; width: min(510px, 100%); border: 1px solid rgba(144, 188, 208, .3); border-radius: 12px; overflow: hidden; transform: rotate(1.2deg); background: #0d151f; box-shadow: 0 35px 85px rgba(0,0,0,.5), 0 0 0 10px rgba(255,255,255,.025); }
.extension-window-bar { height: 40px; display: flex; align-items: center; gap: 6px; padding: 0 14px; border-bottom: 1px solid var(--extension-line); background: #101c29; }
.extension-window-bar span { width: 7px; height: 7px; border-radius: 50%; background: #3f5967; }
.extension-window-bar span:first-child { background: #35c995; }
.extension-window-bar strong { margin-left: 8px; color: #a4b5c5; font-size: 11px; }
.extension-window-body { padding: 20px; background: linear-gradient(145deg, #111d2a, #0b111a); }
.extension-window-brand { display: flex; align-items: center; gap: 10px; }
.extension-window-brand img { width: 54px; height: 36px; object-fit: contain; }
.extension-window-brand span { display: grid; gap: 3px; }
.extension-window-brand strong { color: var(--extension-accent); font-size: 13px; letter-spacing: .08em; }
.extension-window-brand small { color: var(--extension-muted); font-size: 10px; }
.extension-window-search, .extension-window-editor { margin-top: 20px; border: 1px solid var(--extension-line); border-radius: 6px; background: #091019; }
.extension-window-search { padding: 11px 12px; color: #728596; font-size: 11px; }
.extension-window-editor { min-height: 126px; padding: 13px; }
.extension-window-editor span { color: var(--extension-accent); font-size: 11px; font-weight: 800; }
.extension-window-editor p { margin: 14px 0 0; color: #d3e1ec; font: 12px/1.8 Consolas, monospace; }
.extension-window-chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 13px; }
.extension-window-chips span { border: 1px solid rgba(0,216,238,.24); border-radius: 4px; padding: 5px 7px; color: #8edfe7; background: rgba(0,216,238,.08); font-size: 10px; }

.extension-proof { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--extension-line); border-bottom: 1px solid var(--extension-line); }
.extension-proof div { min-height: 92px; display: grid; align-content: center; gap: 5px; padding: 14px 22px; }
.extension-proof div + div { border-left: 1px solid var(--extension-line); }
.extension-proof strong { color: var(--extension-ink); font-size: 14px; }
.extension-proof span { color: var(--extension-muted); font-size: 11px; }

.extension-section { padding: 92px 0 24px; }
.extension-section-heading { max-width: 660px; }
.extension-section-heading h2, .extension-install h2, .extension-final-cta h2 { margin: 0; font-size: clamp(27px, 3vw, 40px); line-height: 1.2; }
.extension-section-heading > p:last-child, .extension-install-copy > p, .extension-final-cta > p { margin-top: 12px; color: var(--extension-muted); font-size: 13px; line-height: 1.75; }
.extension-feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 28px; }
.extension-feature-card { min-height: 174px; position: relative; padding: 20px; border: 1px solid var(--extension-line); border-radius: 8px; background: linear-gradient(145deg, rgba(20,31,44,.96), rgba(12,19,29,.96)); }
.extension-feature-card::after { content: ""; position: absolute; right: 18px; bottom: 18px; width: 34px; height: 1px; background: var(--extension-accent); opacity: .55; }
.extension-feature-index { color: var(--extension-accent); font: 800 11px Consolas, monospace; }
.extension-feature-card h3 { margin: 20px 0 8px; font-size: 16px; }
.extension-feature-card p { margin: 0; color: var(--extension-muted); font-size: 12px; line-height: 1.7; }

.extension-workflow { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
.extension-steps { display: grid; gap: 10px; }
.extension-steps article { display: grid; grid-template-columns: 38px minmax(0, 1fr); gap: 13px; padding: 16px; border: 1px solid var(--extension-line); border-radius: 7px; background: rgba(255,255,255,.025); }
.extension-steps article > span { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 6px; color: #03151a; background: var(--extension-accent); font-weight: 900; }
.extension-steps h3 { margin: 1px 0 6px; font-size: 14px; }
.extension-steps p { margin: 0; color: var(--extension-muted); font-size: 12px; line-height: 1.7; }

.extension-install { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 48px; align-items: start; padding-top: 78px; }
.extension-install-copy ul { display: grid; gap: 9px; margin: 22px 0 0; padding-left: 19px; color: var(--extension-soft); font-size: 12px; line-height: 1.7; }
.extension-release-card { border: 1px solid rgba(0,216,238,.32); border-radius: 8px; padding: 20px; background: linear-gradient(145deg, rgba(0,216,238,.1), rgba(15,23,34,.98) 45%); }
.extension-release-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.extension-release-card-top div { display: grid; gap: 7px; }
.extension-release-label { color: var(--extension-accent); font: 800 10px Consolas, monospace; letter-spacing: .12em; }
.extension-release-card-top strong { font-size: 16px; }
.extension-release-card-top b { color: var(--extension-accent); font: 800 14px Consolas, monospace; }
.extension-release-card dl { display: grid; gap: 8px; margin: 22px 0; }
.extension-release-card dl div { display: flex; justify-content: space-between; gap: 10px; padding-bottom: 8px; border-bottom: 1px solid rgba(154,175,197,.11); }
.extension-release-card dt { color: var(--extension-muted); font-size: 11px; }
.extension-release-card dd { margin: 0; color: var(--extension-soft); font-size: 11px; }
.extension-release-download { width: 100%; }
.extension-release-card > p { margin: 14px 0 0; color: #718396; font-size: 10px; }
.extension-release-card > .extension-release-status { color: #6f9ca5; line-height: 1.5; }

.extension-faq { padding-top: 72px; }
.extension-faq-list { display: grid; gap: 8px; max-width: 820px; margin-top: 25px; }
.extension-faq-list details { border: 1px solid var(--extension-line); border-radius: 7px; background: rgba(255,255,255,.025); }
.extension-faq-list summary { padding: 16px 18px; color: var(--extension-soft); cursor: pointer; font-size: 13px; font-weight: 800; }
.extension-faq-list p { margin: -3px 18px 17px; color: var(--extension-muted); font-size: 12px; line-height: 1.75; }
.extension-final-cta { margin: 72px 0 20px; padding: 62px 24px; border: 1px solid rgba(0,216,238,.24); border-radius: 8px; text-align: center; background: radial-gradient(circle at 50% 0, rgba(0,216,238,.15), transparent 52%), #0d1722; }
.extension-final-cta > p { max-width: 480px; margin-inline: auto; }
.extension-final-cta .extension-primary-action { margin-top: 25px; }
.extension-footer { width: min(1180px, calc(100% - 32px)); display: flex; flex-wrap: wrap; gap: 16px; margin: 0 auto; padding: 20px 0 36px; color: #728396; font-size: 11px; }
.extension-footer a { color: var(--extension-soft); text-decoration: none; }
.extension-footer a:hover { color: var(--extension-accent); }

@media (max-width: 900px) {
  .extension-hero { grid-template-columns: 1fr; gap: 16px; padding-top: 50px; }
  .extension-hero-copy { max-width: 680px; }
  .extension-hero-visual { min-height: 330px; }
  .extension-workflow, .extension-install { grid-template-columns: 1fr; gap: 28px; }
  .extension-install { padding-top: 60px; }
}

@media (max-width: 640px) {
  .extension-page { width: min(100% - 20px, 560px); }
  .extension-hero { min-height: 0; padding: 36px 0 38px; }
  .extension-hero h1 { font-size: 40px; }
  .extension-hero-lead { font-size: 15px; }
  .extension-hero-actions { align-items: stretch; flex-direction: column; }
  .extension-primary-action, .extension-secondary-action { width: 100%; }
  .extension-release-strip { gap: 8px 12px; }
  .extension-release-strip span + span { padding-left: 12px; }
  .extension-hero-visual { min-height: 255px; }
  .extension-window { transform: none; }
  .extension-window-body { padding: 14px; }
  .extension-window-editor { min-height: 105px; }
  .extension-proof { grid-template-columns: repeat(2, 1fr); }
  .extension-proof div { min-height: 74px; padding: 12px; }
  .extension-proof div:nth-child(3) { border-left: 0; border-top: 1px solid var(--extension-line); }
  .extension-proof div:nth-child(4) { border-top: 1px solid var(--extension-line); }
  .extension-section { padding-top: 64px; }
  .extension-feature-grid { grid-template-columns: 1fr; }
  .extension-feature-card { min-height: 145px; }
  .extension-release-card { width: 100%; }
  .extension-final-cta { margin-top: 55px; padding: 46px 18px; }
  .extension-footer { width: calc(100% - 20px); }
}