:root {
  --ink: #17211f;
  --muted: #687570;
  --paper: #f3f5f0;
  --panel: #ffffff;
  --forest: #14201d;
  --forest-2: #20332d;
  --mint: #b7ded1;
  --mint-strong: #6ab59e;
  --coral: #d87860;
  --gold: #d5a75d;
  --line: #dbe2dc;
  --shadow: 0 18px 44px rgba(20, 32, 29, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body { margin: 0; color: var(--ink); background: var(--paper); font: 15px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif; }
a { color: inherit; }
.wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 3; padding: 17px 0; border-bottom: 1px solid rgba(219,226,220,.84); background: rgba(243,245,240,.95); backdrop-filter: blur(12px); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); font-size: 18px; font-weight: 850; letter-spacing: .04em; text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 10px; object-fit: cover; }
.nav-links { display: flex; flex-wrap: wrap; gap: 20px; color: var(--muted); font-size: 13px; }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.nav-links .nav-strong { color: #4d927c; font-weight: 800; }
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr); gap: 72px; align-items: center; padding: 94px 0 92px; }
.eyebrow { margin: 0 0 15px; color: #4d927c; font-size: 12px; font-weight: 850; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; color: var(--ink); line-height: 1.16; letter-spacing: -.02em; }
h1 { max-width: 690px; font-size: clamp(48px, 6.5vw, 82px); }
h1 span { color: var(--coral); }
.lead { max-width: 660px; margin: 25px 0 0; color: var(--muted); font-size: 17px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 45px; padding: 0 18px; border: 1px solid var(--ink); border-radius: 7px; font-weight: 800; text-decoration: none; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 9px 18px rgba(23,33,32,.12); }
.button.primary { color: #fff; background: var(--forest); }
.button.secondary { color: var(--ink); background: transparent; }
.hero-note { margin-top: 16px; color: var(--muted); font-size: 12px; }
.hero-visual { position: relative; display: grid; place-items: center; min-height: 420px; padding: 45px; border: 1px solid #cfddd5; border-radius: 10px; background: var(--mint); box-shadow: var(--shadow); overflow: hidden; }
.hero-visual::before { content: "言灵"; position: absolute; top: 22px; left: 25px; color: rgba(20,32,29,.28); font-size: 12px; font-weight: 850; letter-spacing: .18em; writing-mode: vertical-rl; }
.hero-visual::after { content: "Y A N L I N G"; position: absolute; right: 23px; bottom: 22px; color: rgba(20,32,29,.3); font-size: 10px; letter-spacing: .24em; }
.hero-visual img { position: relative; z-index: 1; width: min(285px, 82%); border-radius: 52px; box-shadow: 0 24px 43px rgba(20,32,29,.20); }
.section { padding: 78px 0; border-top: 1px solid var(--line); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-head p { max-width: 580px; margin: 0; color: var(--muted); }
h2 { font-size: clamp(32px, 4.5vw, 49px); }
h3 { font-size: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.tile { padding: 25px; border: 1px solid var(--line); border-radius: 9px; background: var(--panel); }
.tile p { margin: 10px 0 0; color: var(--muted); }
.number { display: inline-grid; place-items: center; width: 32px; height: 32px; margin-bottom: 19px; border-radius: 50%; color: var(--ink); background: var(--mint); font-size: 12px; font-weight: 900; }
.release-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, .7fr); gap: 26px; align-items: start; padding: 29px; border-left: 5px solid var(--coral); background: var(--panel); box-shadow: var(--shadow); }
.release-panel p { margin: 8px 0 0; color: var(--muted); }
.hash { display: block; margin-top: 16px; padding: 13px; overflow-wrap: anywhere; border: 1px solid var(--line); border-radius: 7px; color: #42695c; background: #f7faf7; font: 700 12px/1.6 ui-monospace, SFMono-Regular, Consolas, monospace; }
.copy-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.copy-row button { min-height: 38px; padding: 0 12px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); background: #fff; font-weight: 700; cursor: pointer; }
.steps { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; counter-reset: step; }
.steps li { display: grid; grid-template-columns: 34px 1fr; gap: 13px; align-items: start; counter-increment: step; }
.steps li::before { content: counter(step); display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; color: #fff; background: var(--forest); font-weight: 800; }
.steps strong { display: block; } .steps span { color: var(--muted); font-size: 14px; }
.notice { padding: 18px 20px; border: 1px solid #ead0c8; border-radius: 8px; color: #77483d; background: #fff7f3; }
.notice strong { color: #5c332b; }
.faq-list { display: grid; gap: 10px; margin-top: 31px; }
details { padding: 17px 20px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
summary { cursor: pointer; font-weight: 800; } details p, details ul { margin: 12px 0 0; color: var(--muted); }
.prose { max-width: 850px; } .prose h2 { margin-top: 43px; font-size: 30px; } .prose h3 { margin-top: 28px; } .prose p, .prose li { color: var(--muted); } .prose ul, .prose ol { padding-left: 23px; }
.prose code { padding: 2px 5px; border-radius: 4px; color: #42695c; background: #e6f0eb; font: 13px ui-monospace, SFMono-Regular, Consolas, monospace; }
.prose pre { white-space: pre-wrap; overflow: auto; padding: 20px; border: 1px solid var(--line); border-radius: 8px; background: #fff; font: 13px/1.7 ui-monospace, SFMono-Regular, Consolas, monospace; }
.footer { padding: 39px 0 54px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 15px; margin-top: 10px; } .footer-links a { color: var(--ink); }
@media (max-width: 760px) {
  .wrap { width: min(100% - 28px, 620px); } .site-header { position: static; } .nav { align-items: flex-start; flex-direction: column; gap: 13px; } .nav-links { gap: 12px 17px; }
  .hero { grid-template-columns: 1fr; gap: 34px; padding: 55px 0 58px; } h1 { font-size: 49px; } .lead { font-size: 16px; } .hero-visual { min-height: 280px; padding: 32px; } .hero-visual img { width: 190px; border-radius: 32px; }
  .section { padding: 54px 0; } .section-head { align-items: flex-start; flex-direction: column; } h2 { font-size: 34px; } .grid-3, .grid-2, .release-panel { grid-template-columns: 1fr; } .release-panel { padding: 22px; }
}