:root {
  --ink: #15211e;
  --muted: #596662;
  --paper: #fbfcf8;
  --line: #d8dfda;
  --mint: #c7eee0;
  --mint-deep: #0c6e58;
  --coral: #f36f62;
  --coral-deep: #a73e34;
  --amber: #f6c85f;
  --charcoal: #1e2926;
  --radius: 8px;
  --shadow: 0 14px 35px rgba(21, 33, 30, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}
button, input, select { font: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.16; }
ul, ol { margin: 0; padding: 0; }

.skip-link { position: fixed; top: -60px; left: 16px; z-index: 20; padding: 8px 12px; border-radius: 4px; background: var(--ink); color: #fff; }
.skip-link:focus { top: 12px; }
.page-shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.site-header { height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 0 max(24px, calc((100vw - 1180px) / 2)); background: rgba(251, 252, 248, 0.98); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 800; letter-spacing: 0; white-space: nowrap; }
.brand-mark { width: 31px; height: 31px; display: inline-grid; place-items: center; background: var(--coral); color: white; border-radius: 8px; }
.brand-mark svg { width: 17px; height: 17px; }
.brand-mark.small { width: 22px; height: 22px; vertical-align: -5px; margin-right: 6px; }
.brand-mark.small svg { width: 13px; height: 13px; }
.site-header nav { display: flex; align-items: center; gap: 28px; color: var(--muted); font-size: 14px; }
.site-header nav a:hover { color: var(--coral-deep); }
.public-badge { display: inline-flex; align-items: center; gap: 7px; color: var(--mint-deep); font-size: 13px; font-weight: 700; white-space: nowrap; }
.public-badge span { width: 8px; height: 8px; border-radius: 50%; background: #43b77d; }

.hero { min-height: min(720px, calc(86svh - 72px)); height: calc(86svh - 72px); position: relative; overflow: hidden; background: #edf0eb; display: flex; align-items: center; }
.hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: rgba(251, 252, 248, 0.12); }
.hero-content { position: relative; z-index: 1; padding-top: 42px; }
.eyebrow { color: var(--mint-deep); font-size: 12px; font-weight: 800; letter-spacing: 0; }
.eyebrow.coral { color: var(--coral-deep); }
.eyebrow.amber { color: #9a6700; }
.hero h1 { margin-top: 10px; max-width: 600px; font-size: clamp(48px, 7vw, 94px); letter-spacing: 0; }
.hero-copy { margin-top: 18px; max-width: 470px; font-size: clamp(20px, 2vw, 26px); line-height: 1.45; font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid transparent; border-radius: 6px; padding: 10px 16px; font-weight: 800; font-size: 14px; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button svg { width: 17px; height: 17px; }
.button-primary { background: var(--coral); color: #fff; box-shadow: 0 8px 18px rgba(165, 62, 52, .24); }
.button-primary:hover { background: var(--coral-deep); }
.button-secondary { background: rgba(255, 255, 255, .8); border-color: #b9c3be; }
.button-secondary:hover { background: #fff; }
.hero-note { display: flex; align-items: center; gap: 7px; margin-top: 21px; color: #41514c; font-size: 13px; font-weight: 600; }
.hero-note svg { width: 16px; height: 16px; color: var(--mint-deep); }
.scroll-cue { position: absolute; right: max(24px, calc((100vw - 1180px) / 2)); bottom: 26px; width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid rgba(21,33,30,.2); border-radius: 50%; background: rgba(255,255,255,.78); z-index: 1; }
.scroll-cue svg { width: 18px; }

.trust-strip { border-bottom: 1px solid var(--line); background: #f2f7f2; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.trust-grid p { display: grid; gap: 2px; padding: 20px 24px; border-right: 1px solid var(--line); }
.trust-grid p:last-child { border-right: none; }
.trust-grid strong { font-size: 15px; }
.trust-grid span { color: var(--muted); font-size: 13px; }

.section { padding: 112px 0; }
.section-heading { max-width: 690px; margin-bottom: 42px; }
.section-heading h2, .output-copy h2, .faq-layout h2, .evidence-layout h2 { margin-top: 10px; font-size: clamp(30px, 4vw, 52px); letter-spacing: 0; }
.section-heading > p:not(.eyebrow) { margin-top: 16px; color: var(--muted); font-size: 17px; }
.split-heading { max-width: none; display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, .62fr); align-items: end; gap: 48px; }
.split-heading > p { color: var(--muted); font-size: 16px; }

.demo-section { background: #fff; }
.demo-studio { display: grid; grid-template-columns: 286px minmax(0, 1fr); min-height: 550px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.demo-sidebar { padding: 25px; background: #eff7f2; border-right: 1px solid var(--line); display: flex; flex-direction: column; }
.panel-label { font-size: 12px; color: var(--muted); font-weight: 800; }
.product-picker { display: grid; gap: 8px; margin-top: 12px; }
.product-choice { text-align: left; padding: 10px 11px; border: 1px solid transparent; border-radius: 5px; background: transparent; color: #3f4e48; font-size: 14px; font-weight: 700; }
.product-choice:hover { background: rgba(255,255,255,.7); }
.product-choice.is-active { border-color: #85b7a5; background: #fff; color: var(--ink); }
.demo-input { display: grid; gap: 5px; margin-top: 26px; padding: 13px; border: 1px solid #c6d9d0; border-radius: 6px; background: #fff; }
.demo-input span { color: var(--muted); font-size: 12px; }
.demo-input strong { font-size: 15px; }
.demo-button { width: 100%; margin-top: 13px; }
.tiny-note { display: flex; align-items: flex-start; gap: 6px; margin-top: auto; color: #68756f; font-size: 12px; line-height: 1.45; }
.tiny-note svg { flex: 0 0 auto; width: 14px; height: 14px; }
.demo-main { min-width: 0; padding: 25px; background: #fcfdfb; }
.demo-topbar { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #a2aba7; }
.status-dot.is-running { background: var(--amber); box-shadow: 0 0 0 4px rgba(246,200,95,.22); }
.status-dot.is-done { background: #42ae76; box-shadow: 0 0 0 4px rgba(66,174,118,.16); }
.demo-mode { margin-left: auto; padding: 3px 7px; border-radius: 3px; background: #f2eee5; color: #87611a; font-size: 10px; font-weight: 800; }
.terminal { margin-top: 18px; padding: 19px; border-radius: 6px; background: var(--charcoal); color: #e9f3ee; }
.terminal-prompt { display: flex; gap: 8px; align-items: center; margin-bottom: 15px; color: #c8e7da; font-size: 13px; }
.terminal-prompt span { padding: 2px 6px; border-radius: 3px; background: rgba(199,238,224,.16); color: var(--mint); font-size: 11px; font-weight: 800; }
.demo-steps { display: grid; gap: 11px; list-style: none; }
.demo-steps li { display: flex; align-items: center; gap: 9px; color: #aebbb5; font-size: 14px; transition: color .2s ease; }
.demo-steps li svg { width: 15px; height: 15px; }
.demo-steps li.is-running { color: #ffe0a3; }
.demo-steps li.is-running svg { color: var(--amber); animation: pulse 1s infinite; }
.demo-steps li.is-done { color: #e5f7ef; }
.demo-steps li.is-done svg { color: #61d19a; }
@keyframes pulse { 50% { opacity: .35; transform: scale(.8); } }
.demo-result { margin-top: 18px; border: 1px solid var(--line); border-radius: 6px; background: #fff; overflow: hidden; }
.result-summary { min-height: 72px; display: flex; align-items: center; gap: 10px; padding: 13px 16px; border-bottom: 1px solid var(--line); }
.result-icon { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 6px; background: #e9f8f1; color: var(--mint-deep); }
.result-icon svg { width: 18px; }
.result-summary div { display: grid; gap: 1px; }
.result-summary span:not(.result-icon), .result-summary strong { font-size: 12px; color: var(--muted); }
.result-summary strong { color: var(--ink); font-size: 14px; }
.result-count { margin-left: auto; font-size: 12px !important; font-weight: 800; color: var(--mint-deep) !important; }
.result-content { padding: 16px; color: var(--muted); font-size: 14px; }
.result-content > p { margin: 0; }
.result-content.is-visible { color: var(--ink); }
.mini-output { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.mini-output div { padding: 10px; border-left: 3px solid var(--mint); background: #f7faf7; }
.mini-output b, .mini-output span { display: block; }
.mini-output b { font-size: 12px; color: var(--muted); }
.mini-output span { margin-top: 3px; font-size: 13px; font-weight: 800; }
.result-note { margin-top: 13px; padding-top: 13px; border-top: 1px dashed var(--line); color: var(--muted); font-size: 12px; }

.workflow-section { background: #edf7f2; }
.workflow-list { list-style: none; border-top: 1px solid #bcd4c9; }
.workflow-list li { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 30px; padding: 26px 0; border-bottom: 1px solid #bcd4c9; }
.workflow-number { color: var(--mint-deep); font-weight: 800; font-size: 14px; }
.workflow-list h3 { font-size: 21px; }
.workflow-list p { margin-top: 7px; color: var(--muted); max-width: 640px; }

.output-section { background: #fff; }
.output-layout { display: grid; grid-template-columns: minmax(0, .75fr) minmax(0, 1.25fr); gap: 68px; align-items: start; }
.output-copy p:not(.eyebrow) { margin-top: 16px; color: var(--muted); font-size: 17px; }
.output-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.output-grid article { min-height: 188px; padding: 23px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.output-grid svg { width: 22px; height: 22px; color: var(--coral); }
.output-grid h3 { margin-top: 28px; font-size: 18px; }
.output-grid p { margin-top: 6px; color: var(--muted); font-size: 14px; }

.boundaries-section { background: var(--charcoal); color: #fff; }
.boundaries-section .eyebrow { color: #9ee2c6; }
.boundaries-section .split-heading > p { color: #b9c8c1; }
.boundary-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.boundary-columns section { padding: 28px; border-radius: 7px; }
.boundary-good { background: #254e41; }
.boundary-stop { background: #54342f; }
.boundary-title { display: flex; align-items: center; gap: 10px; }
.boundary-title svg { width: 24px; height: 24px; }
.boundary-good svg { color: #8eebc5; }.boundary-stop svg { color: #ffad9f; }
.boundary-title h3 { font-size: 20px; }
.boundary-columns ul { display: grid; gap: 12px; margin-top: 21px; padding-left: 18px; color: #e8f0ec; }
.boundary-columns li { padding-left: 3px; }

.evidence-section { background: #f5ede0; }
.evidence-layout { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 72px; align-items: center; }
.evidence-layout p:not(.eyebrow) { margin-top: 16px; color: #615b50; font-size: 17px; }
.evidence-list { border-top: 1px solid #c9bda9; }
.evidence-list div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 15px; padding: 15px 0; border-bottom: 1px solid #c9bda9; }
.evidence-list dt { display: flex; align-items: center; gap: 9px; font-weight: 800; }
.evidence-list dt svg { width: 19px; height: 19px; color: #9a6700; }
.evidence-list dd { margin: 0; color: #615b50; text-align: right; }

.faq-section { background: #fff; }
.faq-layout { display: grid; grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); gap: 70px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; min-height: 67px; display: block; padding: 21px 36px 19px 0; cursor: pointer; font-weight: 800; line-height: 1.5; list-style: none; overflow-wrap: anywhere; }
.faq-list summary > span { display: block; min-width: 0; }
.faq-list summary::marker { content: ""; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary svg { position: absolute; top: 25px; right: 6px; width: 18px; transition: transform .2s ease; }
.faq-list details[open] summary svg { transform: rotate(45deg); }
.faq-list details p { margin: -4px 42px 18px 0; color: var(--muted); }

.site-footer { padding: 25px 0; background: var(--ink); color: #e6eee9; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 25px; font-size: 14px; }
.footer-inner small { color: #a5b5ad; }
.footer-inner > p:last-child { color: #b9c8c1; text-align: right; }

@media (max-width: 820px) {
  .site-header { height: 62px; padding: 0 16px; }.site-header nav { display: none; }.public-badge { font-size: 12px; }
  .page-shell { width: min(100% - 32px, 620px); }.hero { min-height: 630px; height: 84svh; align-items: flex-end; }.hero > img { object-position: 12% center; }.hero-shade { background: rgba(251, 252, 248, .24); }.hero-content { padding-bottom: 70px; }.hero h1 { font-size: clamp(46px, 15vw, 72px); }.hero-copy { font-size: 20px; max-width: 375px; }.scroll-cue { right: 16px; bottom: 18px; }
  .trust-grid { grid-template-columns: 1fr 1fr; }.trust-grid p:nth-child(2) { border-right: none; }.trust-grid p { padding: 15px; }.trust-grid p:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section { padding: 78px 0; }.split-heading, .output-layout, .evidence-layout, .faq-layout { grid-template-columns: 1fr; gap: 22px; }.section-heading { margin-bottom: 30px; }.section-heading h2, .output-copy h2, .faq-layout h2, .evidence-layout h2 { font-size: 34px; }
  .demo-studio { grid-template-columns: 1fr; }.demo-sidebar { min-height: auto; border-right: none; border-bottom: 1px solid var(--line); }.product-picker { grid-template-columns: repeat(3, minmax(0, 1fr)); }.product-choice { min-height: 54px; text-align: center; font-size: 12px; }.demo-input { margin-top: 18px; }.tiny-note { margin-top: 15px; }.demo-main { padding: 18px; }.mini-output { grid-template-columns: 1fr; }
  .workflow-list li { grid-template-columns: 50px minmax(0,1fr); gap: 16px; }.workflow-list h3 { font-size: 19px; }
  .output-grid { grid-template-columns: 1fr; }.output-grid article { min-height: auto; }.output-grid h3 { margin-top: 18px; }
  .boundary-columns { grid-template-columns: 1fr; }.boundary-columns section { padding: 22px; }.evidence-list div { grid-template-columns: 1fr; gap: 7px; }.evidence-list dd { text-align: left; padding-left: 28px; }.footer-inner { align-items: flex-start; flex-direction: column; }.footer-inner > p:last-child { text-align: left; }
}

@media (max-width: 400px) { .product-picker { grid-template-columns: 1fr; }.product-choice { min-height: 38px; text-align: left; }.hero-actions { display: grid; }.button { width: 100%; }.trust-grid p { padding: 13px; }.section-heading h2, .output-copy h2, .faq-layout h2, .evidence-layout h2 { font-size: 30px; } }