:root {
  color-scheme: light;
  --paper: #f7f9f7;
  --ink: #192e2a;
  --green: #125b4e;
  --action: #176c5d;
  --muted: #5e7375;
  --line: #d8e4df;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 system-ui, "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: inherit; text-decoration: none; }
a:focus-visible, summary:focus-visible { outline: 3px solid #447f69; outline-offset: 6px; }
[hidden] { display: none !important; }
.page-width { width: min(1336px, calc(100% - 144px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 10; top: 12px; left: 16px; transform: translateY(-180%); background: white; padding: 10px 18px; border: 1px solid var(--green); border-radius: 8px; }
.skip-link:focus { transform: none; }
.site-header { border-bottom: 1px solid var(--line); }
.header-inner { height: 102px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.site-brand { display: flex; align-items: center; gap: 18px; flex-shrink: 0; font-size: 28px; font-weight: 750; line-height: 1.25; }
.brand-icon { display: grid; place-items: center; width: 54px; height: 54px; background: var(--green); color: white; border-radius: 14px; font-size: 32px; font-weight: 600; }
.site-brand small { display: block; margin-top: 5px; color: var(--muted); font-size: 11px; letter-spacing: 2.8px; font-weight: 500; }
nav { display: flex; align-items: center; gap: 40px; font-size: 16px; font-weight: 550; }
nav > a:not(.button):hover { color: var(--green); text-decoration: underline; text-underline-offset: 6px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 52px; padding: 12px 34px; border-radius: 10px; font-weight: 650; transition: background-color .15s, box-shadow .15s; }
.primary { background: var(--action); color: white; }
.primary:hover { background: #104f43; box-shadow: 0 3px 10px #125b4e16; }
.hero { position: relative; isolation: isolate; overflow: hidden; }
.hero-inner { min-height: 670px; padding-block: 70px 62px; position: relative; }
.hero-content { width: 510px; max-width: 44%; position: relative; z-index: 1; }
.eyebrow { margin: 0 0 23px; color: var(--green); font-size: 18px; letter-spacing: 2px; font-weight: 600; }
h1 { margin: 0; font-size: clamp(42px, 4.6vw, 68px); font-weight: 750; line-height: 1.3; letter-spacing: -1px; }
h1 span { color: var(--action); white-space: nowrap; }
.hero-copy { margin: 26px 0 0; max-width: 510px; color: var(--muted); font-size: 20px; line-height: 1.8; }
.hero-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; margin-top: 37px; }
.start-button { min-height: 68px; padding: 17px 44px; font-size: 21px; }
.login-link { color: var(--green); font-size: 17px; text-decoration: underline; text-underline-offset: 5px; }
.login-link:hover { color: #082e25; }
.helper { min-height: 26px; margin: 30px 0 0; color: var(--muted); font-size: 15px; overflow-wrap: anywhere; }
.hero-art { position: absolute; z-index: 0; width: min(64%, 950px); right: -1%; top: 12px; pointer-events: none; }
.hero-art img { width: 100%; height: auto; display: block; mix-blend-mode: multiply; }
.features { display: grid; grid-template-columns: 1fr 24px 1fr 24px 1fr; align-items: center; gap: 30px; padding: 41px 22px 45px; border-block: 1px solid var(--line); }
.features article { display: flex; align-items: center; gap: 20px; min-width: 0; }
.feature-icon { width: 94px; height: 94px; display: grid; place-items: center; flex-shrink: 0; border-radius: 50%; background: #e5eeea; color: var(--green); }
.icon { display: inline-block; width: 38px; height: 38px; background-color: currentColor; mask: var(--icon) center / contain no-repeat; -webkit-mask: var(--icon) center / contain no-repeat; flex-shrink: 0; }
.screening-icon { --icon: url('/assets/vendor/phosphor/file-magnifying-glass.svg'); }
.extraction-icon { --icon: url('/assets/vendor/phosphor/list-bullets.svg'); }
.collaboration-icon { --icon: url('/assets/vendor/phosphor/users-three.svg'); }
.arrow-icon { --icon: url('/assets/vendor/phosphor/arrow-right.svg'); width: 24px; height: 24px; }
.flow-arrow { color: #849695; }
.features h2 { margin: 0 0 5px; font-size: 23px; font-weight: 700; line-height: 1.4; }
.features p { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.65; }
.evidence-note { margin-block: 26px 34px; text-align: center; font-size: 14px; color: var(--muted); }
.workflow { scroll-margin-top: 30px; border-block: 1px solid var(--line); padding-block: 20px; }
.workflow summary { cursor: pointer; color: var(--green); font-size: 16px; font-weight: 600; }
.workflow summary > span { float: right; color: var(--muted); font-size: 14px; font-weight: 400; }
.workflow ol { display: grid; grid-template-columns: repeat(3, 1fr); gap: 46px; padding-left: 24px; margin: 26px 0 8px; }
.workflow li { padding-left: 4px; }
.workflow li > span { display: block; color: var(--muted); font-size: 14px; margin-top: 8px; }
.usage-guide { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 44px; margin-top: 32px; border-top: 1px solid var(--line); padding-top: 28px; }
.usage-guide h2 { margin: 0 0 10px; color: var(--ink); font-size: 18px; }
.usage-guide p { margin: 8px 0 0; color: var(--muted); font-size: 15px; line-height: 1.8; }
footer { display: flex; justify-content: space-between; gap: 20px; padding-block: 22px; color: var(--muted); font-size: 12px; }
@media (min-width: 1580px) {
  .hero-art { right: calc((100% - 1460px) / 2); width: 935px; }
}
@media (max-width: 1350px) {
  .hero-art { width: 60%; right: -2%; top: 40px; }
}
@media (max-width: 1250px) {
  .page-width { width: calc(100% - 80px); }
  .hero-inner { min-height: 602px; padding-block: 64px 50px; }
  .hero-content { max-width: 46%; }
  .hero-copy { font-size: 17px; }
  .hero-art { width: 56%; }
  .features { gap: 16px; padding-inline: 0; }
  .feature-icon { width: 68px; height: 68px; }
  .features article { gap: 14px; }
  .features h2 { font-size: 19px; }
  .features p { font-size: 14px; }
}
/* Desktop windows can be narrowed without hiding sign-in or the primary action. */
@media (max-width: 980px) {
  .page-width { width: calc(100% - 64px); }
  .header-inner { height: 90px; }
  .site-brand { font-size: 24px; gap: 12px; }
  nav { gap: 22px; font-size: 14px; }
  nav .button { padding-inline: 24px; }
  .hero-inner { min-height: 574px; padding-block: 52px 44px; }
  .hero-content { max-width: 51%; }
  h1 { font-size: clamp(32px, 4.3vw, 42px); }
  .eyebrow { font-size: 15px; }
  .hero-copy { font-size: 16px; }
  .hero-art { width: 52%; right: -2%; top: 110px; }
  .start-button { min-height: 56px; padding: 14px 28px; font-size: 18px; }
  .features { gap: 12px; grid-template-columns: repeat(3, 1fr); }
  .features article { align-items: flex-start; gap: 12px; }
  .feature-icon { width: 46px; height: 46px; }
  .feature-icon .icon { width: 28px; height: 28px; }
  .flow-arrow { display: none; }
  .features h2 { font-size: 17px; }
  .features p br { display: none; }
}
@media (max-width: 700px) {
  .page-width { width: calc(100% - 40px); }
  .header-inner { height: auto; min-height: 88px; flex-wrap: wrap; padding-block: 16px; gap: 16px; }
  .hero-art { position: relative; width: 100%; right: auto; top: auto; }
  .hero { display: flex; flex-direction: column-reverse; }
  .hero-inner { min-height: 0; padding-block: 38px 0; }
  .hero-content { width: 100%; max-width: none; }
  .hero-copy { max-width: 520px; }
  .features { grid-template-columns: 1fr; gap: 26px; }
  .workflow ol { grid-template-columns: 1fr; gap: 20px; }
  .usage-guide { grid-template-columns: 1fr; }
  .workflow summary > span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}