:root {
  --paper: #f7f7f5;
  --surface: #fff;
  --soft: #efefed;
  --ink: #191919;
  --muted: #787774;
  --faint: #9b9a97;
  --line: #e3e3e1;
  --line-strong: #d3d3d1;
  --pico-font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  --pico-background-color: var(--paper);
  --pico-color: var(--ink);
  --pico-muted-color: var(--muted);
  --pico-primary: var(--ink);
  --pico-primary-background: var(--ink);
  --pico-primary-border: var(--ink);
  --pico-primary-hover: #fff;
  --pico-primary-hover-background: #37352f;
  --pico-primary-hover-border: #37352f;
  --pico-secondary: var(--muted);
  --pico-secondary-background: transparent;
  --pico-secondary-border: var(--line);
  --pico-border-radius: 6px;
  --pico-form-element-spacing-vertical: 0.8rem;
  --pico-form-element-spacing-horizontal: 1.35rem;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
}

a[role="button"]:not(.outline) {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}

a[role="button"]:not(.outline):is(:hover, :focus) {
  background: #37352f;
  border-color: #37352f;
}

.container {
  width: min(1180px, calc(100% - 48px));
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

.site-header {
  padding-block: 14px;
  background: rgba(247, 247, 245, 0.9);
  border-bottom: 1px solid var(--line);
}

.site-header nav,
.site-header ul {
  margin: 0;
}

.site-header nav {
  min-height: 48px;
}

.site-header [role="button"] {
  margin: 0;
  padding: 0.55rem 1rem;
  color: var(--ink);
  border-color: var(--line-strong);
  font-size: 0.78rem;
}

.nav-link {
  color: var(--muted);
  font-size: 0.78rem;
}

.nav-link:hover {
  color: var(--ink);
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  padding: 7px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  place-items: center;
}

.brand-mark img {
  width: 100%;
  height: 100%;
}

.brand strong {
  font-size: 0.95rem;
  letter-spacing: -0.03em;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: clamp(48px, 8vw, 120px);
  align-items: center;
  min-height: 820px;
  padding-block: 84px;
}

.hero-copy small,
.section-heading small,
.closing small {
  color: var(--muted);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero h1 {
  max-width: 760px;
  margin: 22px 0 30px;
  font-size: clamp(4.6rem, 8vw, 7.6rem);
  font-weight: 760;
  line-height: 0.92;
  letter-spacing: -0.08em;
  text-wrap: balance;
}

.hero-copy > p {
  max-width: 560px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 12px;
  width: fit-content;
  margin-top: 38px;
}

.hero-actions [role="button"] {
  min-width: 150px;
  margin: 0;
}

.product-shot {
  justify-self: center;
  width: min(100%, 410px);
  margin: 0;
  padding: 14px 14px 11px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  box-shadow: 0 18px 60px rgba(15, 15, 15, 0.06);
}

.product-shot img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 9px;
}

.product-shot figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}

.method {
  padding-block: 110px;
  background: var(--surface);
  border-block: 1px solid var(--line);
}

.section-heading {
  margin-bottom: 56px;
}

.section-heading > p {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

.section-heading h2,
.closing h2 {
  margin: 15px 0 0;
  color: inherit;
  font-size: clamp(2.8rem, 5.4vw, 5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.06em;
}

.method-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.method-list li {
  display: flex;
  gap: 24px;
  min-height: 190px;
  padding: 32px 28px 28px 0;
  border-right: 1px solid var(--line);
}

.method-list li + li {
  padding-left: 28px;
}

.method-list li:last-child {
  border-right: 0;
}

.method-list > li > span {
  color: var(--faint);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.68rem;
}

.method-list h3 {
  margin: -4px 0 10px;
  color: var(--ink);
  font-size: 1.35rem;
  letter-spacing: -0.04em;
}

.method-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.tools {
  padding-block: 130px 40px;
}

.tools-heading {
  max-width: 780px;
  margin-bottom: 90px;
}

.tool-feature {
  display: grid;
  grid-template-columns: minmax(320px, 0.92fr) minmax(320px, 1.08fr);
  gap: clamp(56px, 9vw, 130px);
  align-items: center;
  min-height: 720px;
  padding-block: 72px;
  border-top: 1px solid var(--line);
}

.tool-feature-reverse .tool-shot {
  grid-column: 2;
}

.tool-feature-reverse .tool-copy {
  grid-row: 1;
  grid-column: 1;
}

.tool-shot {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  height: 640px;
  margin: 0;
  padding: 36px;
  overflow: hidden;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.tool-shot img {
  width: auto;
  height: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  box-shadow: 0 18px 48px rgba(15, 15, 15, 0.08);
}

.tool-copy {
  max-width: 520px;
}

.tool-number {
  display: block;
  margin-bottom: 18px;
  color: var(--faint);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.tool-copy h3 {
  margin: 0 0 22px;
  color: var(--ink);
  font-size: clamp(2.4rem, 4.2vw, 4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.06em;
}

.tool-copy > p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
}

.tool-copy ul {
  margin: 28px 0 32px;
  padding: 0;
  color: var(--ink);
  list-style: none;
  border-top: 1px solid var(--line);
}

.tool-copy li {
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.85rem;
}

.tool-copy > a {
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 650;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 5px;
}

.tool-copy > a:hover {
  text-decoration-color: var(--ink);
}

.closing {
  padding-block: 160px;
  text-align: center;
}

.closing h2 {
  margin-bottom: 36px;
}

.closing [role="button"] {
  min-width: 190px;
  margin: 0;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 28px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.68rem;
}

.site-footer nav {
  display: flex;
  gap: 24px;
  align-items: center;
}

.site-footer a {
  color: var(--muted);
}

.site-footer a:hover {
  color: var(--ink);
}

@media (max-width: 760px) {
  .container {
    width: min(100% - 28px, 560px);
  }

  .site-header {
    padding-block: 12px;
  }

  .nav-link {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 64px;
    min-height: 0;
    padding-block: 76px 90px;
  }

  .hero h1 {
    margin-block: 18px 24px;
    font-size: clamp(3.45rem, 17vw, 5.2rem);
  }

  .hero-copy > p {
    font-size: 1rem;
    line-height: 1.7;
  }

  .hero-actions {
    width: 100%;
    margin-top: 30px;
  }

  .hero-actions [role="button"] {
    min-width: 0;
  }

  .product-shot {
    width: min(100%, 370px);
    padding: 10px 10px 8px;
    border-radius: 14px;
  }

  .product-shot img {
    border-radius: 8px;
  }

  .method {
    padding-block: 88px;
  }

  .section-heading {
    margin-bottom: 42px;
  }

  .method-list {
    grid-template-columns: 1fr;
  }

  .method-list li,
  .method-list li + li {
    min-height: 0;
    padding: 26px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .method-list li:last-child {
    border-bottom: 0;
  }

  .tools {
    padding-block: 90px 20px;
  }

  .tools-heading {
    margin-bottom: 56px;
  }

  .tool-feature,
  .tool-feature-reverse {
    grid-template-columns: 1fr;
    gap: 42px;
    min-height: 0;
    padding-block: 58px;
  }

  .tool-feature-reverse .tool-shot,
  .tool-feature-reverse .tool-copy {
    grid-row: auto;
    grid-column: auto;
  }

  .tool-shot {
    height: 560px;
    padding: 24px;
  }

  .tool-copy h3 {
    font-size: clamp(2.45rem, 12vw, 3.5rem);
  }

  .closing {
    padding-block: 100px;
  }

  .site-footer {
    align-items: flex-start;
  }

  .site-footer nav {
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
  }
}

@media (max-width: 420px) {
  .site-header nav ul:first-child li {
    padding-left: 0;
  }

  .brand strong {
    font-size: 0.86rem;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
    gap: 20px;
  }

  .site-footer nav {
    align-items: flex-start;
  }
}