:root {
  --bg: #fbfbfd;
  --panel: #ffffff;
  --text: #1a1a20;
  --muted: #6b6b78;
  --line: #e8e8ee;
  --accent: #4b6cf5;
  --accent-h: #3d5be0;
  --accent-weak: #eef1fe;
  --green: #1f9d63;
  --green-weak: #e8f7ef;
  --amber: #b0740a;
  --amber-weak: #fdf4e3;
  --radius: 14px;
  --wrap: 1060px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 26px; }

/* ---------------- 导航 ---------------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 16px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #7d93ff);
  color: #fff; font-weight: 700; font-size: 12.5px; letter-spacing: -.3px;
  display: flex; align-items: center; justify-content: center;
  flex: none;
}
.brand-name { font-size: 15.5px; font-weight: 620; letter-spacing: .2px; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav-links a {
  color: var(--muted); font-size: 13.5px; padding: 6px 11px;
  border-radius: 8px; transition: all .14s;
}
.nav-links a:hover { color: var(--text); background: #f4f4f7; text-decoration: none; }
.nav-links a.on { color: var(--text); font-weight: 600; background: var(--accent-weak); }
.nav .btn { margin-left: 10px; }
@media (max-width: 780px) {
  .nav-links a:not(.on) { display: none; }
  .nav .btn span.long { display: none; }
}

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 9px 18px; border-radius: 10px; font-size: 14px; font-weight: 550;
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  cursor: pointer; font-family: inherit; transition: all .15s;
  white-space: nowrap;
}
.btn:hover { background: #f5f5f8; text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-h); border-color: var(--accent-h); }
.btn-lg { padding: 12px 26px; font-size: 15px; border-radius: 11px; }
.btn-sm { padding: 6px 13px; font-size: 13px; border-radius: 8px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

.btn svg { width: 15px; height: 15px; }

/* ---------------- Hero ---------------- */
.hero { padding: 68px 0 54px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--accent-weak); color: #3d4ea8;
  font-size: 12.5px; font-weight: 550; padding: 5px 12px;
  border-radius: 999px; margin-bottom: 20px;
}
.eyebrow .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--green); }
.hero h1 {
  font-size: 38px; line-height: 1.32; letter-spacing: -.6px;
  font-weight: 680; margin: 0 0 16px; max-width: 720px;
}
.hero .lead {
  color: var(--muted); font-size: 16px; max-width: 640px; margin: 0 0 28px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; align-items: center; }
.hero-note { font-size: 12.5px; color: var(--muted); margin-top: 14px; }
@media (max-width: 720px) {
  .hero { padding: 44px 0 36px; }
  .hero h1 { font-size: 27px; }
  .hero .lead { font-size: 15px; }
}

/* ---------------- 区块 ---------------- */
.section { padding: 46px 0; border-top: 1px solid var(--line); }
.sec-head { margin-bottom: 24px; }
.sec-head h2 { font-size: 22px; font-weight: 640; margin: 0 0 7px; letter-spacing: -.2px; }
.sec-head p { margin: 0; color: var(--muted); font-size: 14px; }

.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 22px;
}
.card h3 { font-size: 14.5px; font-weight: 620; margin: 0 0 7px; }
.card p { margin: 0; color: var(--muted); font-size: 13.5px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 820px) { .grid-3 { grid-template-columns: 1fr; } }
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------------- 界面示意图 ---------------- */
.mock {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); overflow: hidden;
  box-shadow: 0 8px 28px rgba(24,24,40,.06);
}
.mock-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px; border-bottom: 1px solid var(--line); background: #fafafc;
}
.mock-bar i { width: 9px; height: 9px; border-radius: 50%; background: #e2e2ea; display: block; }
.mock-bar .title { margin-left: 8px; font-size: 12px; color: var(--muted); }
.mock-body { display: grid; grid-template-columns: 168px 1fr; min-height: 268px; }
.mock-side { border-right: 1px solid var(--line); padding: 12px 10px; background: #fcfcfe; }
.mock-side .item {
  display: flex; align-items: center; gap: 8px;
  font-size: 12.5px; color: var(--muted); padding: 7px 9px; border-radius: 7px;
}
.mock-side .item.on { background: var(--accent-weak); color: #3d4ea8; font-weight: 600; }
.mock-side .item .sq { width: 13px; height: 13px; border-radius: 4px; background: #dcdce6; flex: none; }
.mock-side .item.on .sq { background: var(--accent); }
.mock-main { padding: 16px 18px; }
.mock-row {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border: 1px solid var(--line); border-radius: 9px;
  margin-bottom: 8px; font-size: 12.5px; color: #4a4a58;
}
.mock-row .bar { height: 6px; border-radius: 3px; background: #ebebf2; flex: 1; }
.mock-row .pill {
  font-size: 10.5px; padding: 2px 8px; border-radius: 999px;
  background: var(--green-weak); color: var(--green); font-weight: 600;
}
.mock-row .pill.off { background: #f1f1f5; color: var(--muted); }
.mock-row .sw {
  width: 26px; height: 15px; border-radius: 999px; background: var(--accent); flex: none; position: relative;
}
.mock-row .sw::after {
  content: ""; position: absolute; right: 2px; top: 2px;
  width: 11px; height: 11px; border-radius: 50%; background: #fff;
}
.mock-row .sw.off { background: #d8d8e2; }
.mock-row .sw.off::after { right: auto; left: 2px; }
@media (max-width: 620px) {
  .mock-body { grid-template-columns: 1fr; }
  .mock-side { display: none; }
}

/* ---------------- 下载 ---------------- */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 860px) { .dl-grid { grid-template-columns: 1fr; } }
.dl-card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 22px; display: flex; flex-direction: column;
}
.dl-card.primary { border-color: #c9d4fd; box-shadow: 0 0 0 3px var(--accent-weak); }
.dl-card .os { display: flex; align-items: center; gap: 9px; font-weight: 620; font-size: 14.5px; }
.dl-card .os .badge {
  font-size: 10.5px; font-weight: 600; padding: 2px 8px; border-radius: 999px;
  background: var(--accent); color: #fff;
}
.dl-card .meta { color: var(--muted); font-size: 12.5px; margin: 8px 0 16px; line-height: 1.65; }
.dl-card .btn { width: 100%; margin-top: auto; }
.dl-card .alt { margin-top: 9px; font-size: 12.5px; text-align: center; }

.file-row {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 11px 14px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); font-size: 13px; margin-bottom: 8px;
}
.file-row .fname { font-weight: 550; }
.file-row .fmeta { color: var(--muted); font-size: 12.5px; margin-left: auto; }
.file-row code {
  font-family: ui-monospace, Consolas, monospace; font-size: 11.5px;
  color: var(--muted); background: #f5f5f8; padding: 2px 7px; border-radius: 5px;
}

/* ---------------- 提示条 ---------------- */
.tip {
  border-radius: 11px; padding: 13px 17px; font-size: 13.5px; line-height: 1.7;
  background: var(--accent-weak); color: #37469b; margin-top: 16px;
}
.tip.warn { background: var(--amber-weak); color: var(--amber); }
.tip b { font-weight: 620; }

/* ---------------- 价格 ---------------- */
.plans { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 720px) { .plans { grid-template-columns: 1fr; } }
.plan {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 24px;
}
.plan .pname { font-size: 14px; font-weight: 620; }
.plan .pdesc { color: var(--muted); font-size: 12.5px; margin-top: 3px; }
.plan .price-note {
  margin-top: 14px; font-size: 13px; color: var(--muted);
  background: var(--bg); border: 1px dashed var(--line);
  border-radius: 9px; padding: 9px 13px;
}
.plan ul { margin: 14px 0 0; padding-left: 19px; color: var(--muted); font-size: 13px; }
.plan li { margin: 4px 0; }

/* ---------------- 文档 ---------------- */
.doc h2 { font-size: 19px; font-weight: 640; margin: 34px 0 12px; letter-spacing: -.2px; }
.doc h2:first-child { margin-top: 0; }
.doc h3 { font-size: 14.5px; font-weight: 620; margin: 22px 0 7px; }
.doc p, .doc li { color: #3f3f4c; font-size: 14px; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin: 5px 0; }
.doc code {
  font-family: ui-monospace, Consolas, monospace; font-size: 12.5px;
  background: #f4f4f8; padding: 2px 6px; border-radius: 5px; color: #454555;
}
.doc pre {
  background: #f7f7fa; border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; overflow-x: auto; font-size: 12.5px; line-height: 1.7;
}
.doc pre code { background: none; padding: 0; }
.doc table { border-collapse: collapse; width: 100%; font-size: 13.5px; margin: 12px 0; }
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.doc th { background: #fafafc; font-weight: 600; font-size: 13px; }

/* ---------------- 页脚 ---------------- */
.footer {
  border-top: 1px solid var(--line); margin-top: 20px;
  padding: 30px 0 46px; font-size: 13px; color: var(--muted);
}
.footer-inner { display: flex; flex-wrap: wrap; gap: 14px 26px; align-items: center; }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--text); }
.footer .sep { color: #d5d5de; }
.footer .spacer { flex: 1; }
@media (max-width: 720px) {
  .footer .spacer { flex-basis: 100%; }
}

/* ---------------- 其余 ---------------- */
.toast {
  position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%) translateY(12px);
  background: #1f1f28; color: #fff; font-size: 13px; padding: 9px 18px;
  border-radius: 9px; opacity: 0; pointer-events: none; transition: all .2s; z-index: 60;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.stack { display: flex; flex-direction: column; gap: 10px; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }

/* ---------------- 更新日志 ---------------- */
.release {
  border-bottom: 1px solid var(--line);
  padding: 22px 0;
}
.release:first-child { padding-top: 4px; }
.release:last-child { border-bottom: 0; }
.rel-head { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; }
.rel-ver { font-size: 16px; font-weight: 640; letter-spacing: -.2px; }
.rel-badge {
  font-size: 10.5px; font-weight: 600; padding: 2px 8px; border-radius: 999px;
  background: var(--accent); color: #fff;
}
.rel-date { margin-left: auto; font-size: 12.5px; color: var(--muted); }
.rel-body { color: #3f3f4c; font-size: 13.5px; line-height: 1.75; }
.rel-links { display: flex; gap: 14px; margin-top: 10px; font-size: 13px; }
.rel-p { margin: 4px 0; }
.rel-item { position: relative; padding-left: 15px; margin: 3px 0; }
.rel-item::before {
  content: ""; position: absolute; left: 3px; top: .68em;
  width: 4px; height: 4px; border-radius: 50%; background: #c2c2cf;
}
.rel-quote {
  margin-top: 10px; padding: 2px 0 2px 12px;
  border-left: 2px solid var(--line); color: var(--muted); font-size: 12.5px;
}
.rel-h { font-weight: 620; margin: 10px 0 4px; }
.rel-body code {
  font-family: ui-monospace, Consolas, monospace; font-size: 12px;
  background: #f4f4f8; padding: 1px 5px; border-radius: 4px; color: #454555;
}

/* 下载按钮在「没有可下载版本」时的样子。
   必须写在文件末尾：.btn-primary 用的是单独的背景规则，靠顺序才能稳胜。 */
.btn.disabled,
.btn[aria-disabled="true"],
.btn.btn-primary.disabled {
  pointer-events: none;
  background: #ececf2 !important;
  border-color: transparent !important;
  color: #9b9baa !important;
  box-shadow: none !important;
}