:root {
  --page: #f7f8f6;
  --surface: #ffffff;
  --ink: #19211d;
  --muted: #66716b;
  --line: #dfe5e0;
  --brand: #007b65;
  --brand-dark: #005e4e;
  --code: #17221f;
  --notice: #fff7dc;
  --notice-line: #e8c76b;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--page); color: var(--ink); font-family: Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.65; }
a { color: var(--brand-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--brand); }
.topbar { height: 58px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .96); display: flex; align-items: center; padding: 0 max(20px, calc((100vw - 1180px) / 2)); position: sticky; top: 0; z-index: 10; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 750; text-decoration: none; }
.brand-mark { width: 28px; height: 28px; display: grid; place-items: center; background: var(--brand); color: white; font-size: 15px; font-weight: 800; border-radius: 6px; }
.topbar nav { margin-left: auto; display: flex; gap: 22px; font-size: 14px; }
.topbar nav a { color: var(--muted); text-decoration: none; }
.topbar nav a:hover, .topbar nav a.active { color: var(--brand-dark); }
.shell { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 224px minmax(0, 1fr); min-height: calc(100vh - 58px); }
.sidebar { border-right: 1px solid var(--line); padding: 34px 26px 48px 0; }
.sidebar h2 { font-size: 12px; color: var(--muted); font-weight: 700; margin: 0 0 10px; text-transform: uppercase; letter-spacing: .06em; }
.sidebar a { display: block; padding: 7px 10px; color: #43504a; text-decoration: none; font-size: 14px; border-left: 2px solid transparent; }
.sidebar a:hover { color: var(--brand-dark); background: #edf5f1; }
.sidebar a.active { color: var(--brand-dark); background: #e8f3ef; border-left-color: var(--brand); font-weight: 650; }
.sidebar section + section { margin-top: 28px; }
main { padding: 44px 56px 72px; max-width: 820px; }
.eyebrow { color: var(--brand-dark); font-size: 13px; font-weight: 700; margin: 0 0 10px; }
h1 { font-size: 34px; line-height: 1.22; margin: 0 0 14px; letter-spacing: 0; }
h2 { font-size: 22px; line-height: 1.35; margin: 46px 0 14px; }
p { margin: 0 0 16px; }
.lead { color: var(--muted); font-size: 18px; max-width: 700px; }
.notice { border: 1px solid var(--notice-line); background: var(--notice); padding: 14px 16px; margin: 24px 0; font-size: 14px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); margin: 28px 0; }
.grid a { display: block; min-height: 126px; padding: 18px; background: var(--surface); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-decoration: none; }
.grid a:hover { background: #f1f8f5; }
.grid strong { display: block; color: var(--ink); font-size: 16px; margin-bottom: 5px; }
.grid span { color: var(--muted); font-size: 14px; }
ol, ul { padding-left: 22px; margin: 0 0 18px; }
li { margin: 6px 0; }
code { background: #e9eeeb; color: #26312c; padding: 1px 5px; border-radius: 3px; font-family: "SFMono-Regular", Consolas, monospace; font-size: .9em; }
pre { margin: 16px 0 22px; padding: 18px; overflow-x: auto; background: var(--code); color: #e7f1eb; border-radius: 5px; font: 13px/1.65 "SFMono-Regular", Consolas, monospace; }
pre code { background: transparent; padding: 0; color: inherit; }
table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: 14px; background: var(--surface); }
th, td { text-align: left; border: 1px solid var(--line); padding: 10px 12px; vertical-align: top; }
th { background: #f0f4f1; font-weight: 700; }
.footer { color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); padding-top: 24px; margin-top: 56px; }
.pricing-main { max-width: 920px; }
.pricing-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 28px 0 12px; }
.pricing-summary > div, .model-card { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; }
.pricing-summary > div { padding: 18px; }
.summary-label, .model-kind { display: block; color: var(--brand-dark); font-size: 11px; font-weight: 750; letter-spacing: .06em; }
.pricing-summary strong { display: block; margin: 5px 0 6px; font-size: 15px; }
.pricing-summary p, .model-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.product-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.product-tab { min-height: 34px; padding: 6px 12px; color: #43504a; border: 1px solid var(--line); border-radius: 5px; background: var(--surface); font: inherit; font-size: 13px; cursor: pointer; }
.product-tab:hover { background: #edf5f1; color: var(--brand-dark); }
.product-tab.active { background: var(--brand); border-color: var(--brand); color: #fff; }
.model-catalog { display: grid; gap: 12px; }
.model-card { padding: 20px; }
.model-card[hidden] { display: none; }
.model-card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 10px; }
.model-card h3 { margin: 3px 0 0; font-size: 18px; line-height: 1.35; }
.model-status { flex: 0 0 auto; padding: 3px 8px; border: 1px solid #b9d9cf; border-radius: 99px; background: #edf7f3; color: var(--brand-dark); font-size: 12px; font-weight: 650; }
.model-card dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--line); }
.model-card dl div { min-width: 0; }
.model-card dt { color: var(--muted); font-size: 12px; }
.model-card dd { margin: 3px 0 0; font-size: 13px; }
.numbered-steps { padding: 0; list-style: none; counter-reset: steps; }
.numbered-steps li { position: relative; min-height: 42px; padding: 0 0 16px 42px; counter-increment: steps; }
.numbered-steps li::before { content: counter(steps); position: absolute; left: 0; top: 1px; display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: #e8f3ef; color: var(--brand-dark); font-size: 13px; font-weight: 750; }
.numbered-steps strong { display: block; font-size: 15px; }
.numbered-steps span { color: var(--muted); font-size: 14px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); background: var(--surface); }
.faq-list summary { padding: 14px 16px; cursor: pointer; font-weight: 650; font-size: 14px; }
.faq-list p { padding: 0 16px 14px; margin: 0; color: var(--muted); font-size: 14px; }
@media (max-width: 760px) { .topbar { padding: 0 18px; } .topbar nav { gap: 14px; } .topbar nav a:nth-child(3) { display: none; } .shell { display: block; } .sidebar { display: none; } main { padding: 32px 20px 56px; } h1 { font-size: 30px; } .grid, .pricing-summary { grid-template-columns: 1fr; } .model-card dl { grid-template-columns: 1fr; } }