/* rufus.baozangapp.com — 浅色工具风单页(主色 #3f4555,白底)
   与 bongocat-single(暖白百科风)仍保持形态差异:终端下载卡、编号章节、等宽数据。 */

:root {
  --bg: #ffffff;
  --bg-soft: #f4f6fa;
  --panel: #f8fafc;
  --panel-2: #eef1f6;
  --line: #e2e7ef;
  --text: #232936;
  --sub: #5a6578;
  --mut: #8a94a6;
  --accent: #3f4555;      /* 主色 */
  --accent-deep: #343a48;
  --accent-soft: rgba(63, 69, 85, 0.08);
  --ok: #0f8a4e;          /* 链接与就绪绿(白底可读) */
  --ok-soft: rgba(15, 138, 78, 0.09);
  --warn: #8a6d1a;
  --warn-line: rgba(217, 152, 26, 0.55);
  --warn-bg: #fdf8ec;
  /* 终端下载卡专用(主色深面板,白页的视觉锚点) */
  --term-bg: #3f4555;
  --term-bar: #363c4a;
  --term-line: rgba(255, 255, 255, 0.14);
  --term-text: #ffffff;
  --term-sub: rgba(255, 255, 255, 0.58);
  --term-green: #6ee7a8;
  --wrap: 1280px;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
section, .wrap-pad { scroll-margin-top: 84px; }
a { color: var(--ok); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: var(--mono); font-size: 0.92em; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; color: var(--accent-deep); }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }

/* ---------- top nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-in { display: flex; align-items: center; gap: 22px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 18px; }
.brand img { width: 26px; height: 26px; }
.brand .ver { font-family: var(--mono); font-size: 12.5px; color: var(--accent); border: 1px solid var(--line); background: var(--accent-soft); border-radius: 99px; padding: 1px 9px; font-weight: 400; }
.nav-links { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.nav-links a {
  color: var(--sub); font-size: 14.5px; padding: 8px 11px; border-radius: 8px;
  min-height: 44px; display: inline-flex; align-items: center;
}
.nav-links a:hover { color: var(--text); background: var(--panel-2); text-decoration: none; }
.nav-cta {
  color: #ffffff !important; background: var(--accent); font-weight: 600;
  border-radius: 8px; padding: 8px 16px !important;
}
.nav-cta:hover { background: var(--accent-deep); }
.burger { display: none; background: none; border: 1px solid var(--line); color: var(--text); font-size: 20px; border-radius: 8px; width: 44px; height: 44px; margin-left: auto; cursor: pointer; }

/* ---------- hero ---------- */
.hero { border-bottom: 1px solid var(--line); background:
  radial-gradient(1100px 500px at 85% -10%, rgba(63, 69, 85, 0.07), transparent 60%),
  radial-gradient(800px 420px at -10% 110%, rgba(15, 138, 78, 0.05), transparent 60%);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 44px; padding: 58px 0 62px; align-items: center; }
.kicker { font-family: var(--mono); color: var(--ok); font-size: 13.5px; letter-spacing: 0.12em; text-transform: uppercase; }
.hero h1 { font-size: 40px; line-height: 1.28; margin: 12px 0 16px; font-weight: 700; }
.hero h1 .hl { color: var(--accent); }
.hero-intro { color: var(--sub); font-size: 17px; max-width: 60ch; margin: 0 0 22px; }
.hero-intro strong { color: var(--text); font-weight: 600; }
.badges { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 26px; }
.badge { font-family: var(--mono); font-size: 12.5px; color: var(--sub); border: 1px solid var(--line); background: var(--bg); border-radius: 99px; padding: 3px 11px; }
.badge.on { color: var(--ok); border-color: rgba(15, 138, 78, 0.4); background: var(--ok-soft); }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: stretch; }
.btn-primary, .btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 52px; padding: 10px 24px; border-radius: 10px; font-size: 16.5px; font-weight: 600;
}
.btn-primary { background: var(--accent); color: #ffffff; border: none; cursor: pointer; }
.btn-primary:hover { background: var(--accent-deep); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--panel-2); text-decoration: none; }
.btn-ghost .mono, .btn-primary .mono { font-size: 0.85em; opacity: 0.8; }
.hero-note { font-family: var(--mono); font-size: 12.5px; color: var(--mut); margin-top: 16px; }

/* terminal download card(主色深面板) */
.term { background: var(--term-bg); border: 1px solid var(--term-bg); border-radius: 14px; overflow: hidden; box-shadow: 0 18px 50px rgba(63, 69, 85, 0.28); color: var(--term-text); }
.term-bar { display: flex; align-items: center; gap: 8px; padding: 13px 16px; border-bottom: 1px solid var(--term-line); background: var(--term-bar); }
.term-bar i { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.term-bar i:nth-child(1) { background: #ff5f57; } .term-bar i:nth-child(2) { background: #febc2e; } .term-bar i:nth-child(3) { background: #28c840; }
.term-bar .t { font-family: var(--mono); font-size: 12.5px; color: var(--term-sub); margin-left: 6px; }
.term-head { padding: 14px 18px 4px; font-family: var(--mono); font-size: 13px; color: var(--term-sub); }
.term-head .ok { color: var(--term-green); }
.term-list { padding: 8px 12px 12px; }
.term-row { display: grid; grid-template-columns: 1.5fr 0.6fr auto; gap: 10px; align-items: center; padding: 9px 8px; border-radius: 9px; }
.term-row:hover { background: rgba(255, 255, 255, 0.07); }
.term-row .f { font-family: var(--mono); font-size: 13.5px; color: var(--term-text); }
.term-row .f em { font-style: normal; color: var(--term-green); }
.term-row .f .tag { color: var(--term-sub); }
.term-row .s { font-family: var(--mono); font-size: 12.5px; color: var(--term-sub); text-align: right; }
.term-row .g { font-family: var(--mono); font-size: 12.5px; color: var(--term-green); white-space: nowrap; }
.term-foot { padding: 12px 18px 16px; border-top: 1px dashed var(--term-line); font-size: 13.5px; color: var(--term-sub); display: flex; gap: 16px; flex-wrap: wrap; }
.term-foot a { color: var(--term-green); }

/* ---------- facts strip ---------- */
.facts { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; padding: 26px 0; }
.fact { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.fact .k { font-size: 12.5px; color: var(--mut); font-family: var(--mono); }
.fact .v { font-size: 16.5px; font-weight: 600; margin-top: 3px; }
.fact .v.mono { font-size: 15px; }

/* ---------- sections ---------- */
.section { padding: 58px 0; border-bottom: 1px solid var(--line); }
.section h2 { font-size: 29px; line-height: 1.35; margin: 0 0 8px; font-weight: 700; }
.sec-no { font-family: var(--mono); font-size: 14px; color: var(--accent); display: block; margin-bottom: 10px; letter-spacing: 0.14em; }
.lede { color: var(--sub); font-size: 17px; max-width: none; margin: 0 0 26px; }
.lede strong, .section p strong { color: var(--text); font-weight: 600; }
.section h3 { font-size: 20px; margin: 34px 0 10px; font-weight: 600; }
.section p { color: var(--sub); }
.section p strong { color: var(--text); }

.caveat {
  border: 1px solid var(--warn-line); background: var(--warn-bg);
  border-radius: 10px; padding: 13px 16px; color: var(--warn); font-size: 14.5px; margin: 0 0 20px;
}
.caveat::before { content: "⚠ "; }

blockquote {
  margin: 18px 0; padding: 12px 18px; border-left: 3px solid #d9981a;
  background: var(--warn-bg); color: var(--warn); border-radius: 0 8px 8px 0; font-size: 15px;
}

/* tables */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); }
table { border-collapse: collapse; width: 100%; min-width: 640px; font-size: 14.5px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-family: var(--mono); font-size: 12.5px; color: var(--mut); font-weight: 400; letter-spacing: 0.06em; white-space: nowrap; background: var(--bg-soft); }
td { color: var(--sub); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: rgba(63, 69, 85, 0.02); }
td.num, td .num { font-family: var(--mono); color: var(--text); }
td strong { color: var(--text); }
td a { white-space: nowrap; }

/* feature cards & scene cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.card .t { font-weight: 600; font-size: 16.5px; margin-bottom: 6px; }
.card .t .n { font-family: var(--mono); color: var(--accent); font-size: 13px; margin-right: 8px; }
.card p { margin: 0; font-size: 14.5px; }
.card ul { margin: 0; padding-left: 18px; color: var(--sub); font-size: 14.5px; }

/* accent panel */
.panel-accent { border: 1px solid rgba(63, 69, 85, 0.35); background: linear-gradient(180deg, rgba(63, 69, 85, 0.05), rgba(63, 69, 85, 0.01)); border-radius: 14px; padding: 22px 24px; }
.panel-accent .t { font-weight: 700; font-size: 18px; margin-bottom: 8px; }
.panel-accent p { margin: 0 0 12px; }
.panel-accent p:last-child { margin-bottom: 0; }

ol.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
ol.steps li { counter-increment: step; position: relative; padding: 14px 16px 14px 66px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; margin-bottom: 12px; }
ol.steps li::before {
  content: counter(step, decimal-leading-zero); position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); font-size: 20px; color: var(--accent); border: 1px solid rgba(63, 69, 85, 0.35);
  background: var(--accent-soft); border-radius: 9px; padding: 4px 10px;
}
ol.steps li b { color: var(--text); }
ol.steps li p { margin: 4px 0 0; font-size: 14.5px; }

/* faq */
.faq details { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; margin-bottom: 10px; overflow: hidden; }
.faq summary {
  cursor: pointer; list-style: none; padding: 15px 20px; font-size: 16.5px; font-weight: 600; color: var(--text);
  display: flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 44px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--accent); font-size: 20px; }
.faq details[open] summary::after { content: "−"; }
.faq details[open] summary { border-bottom: 1px solid var(--line); }
.faq .a { padding: 14px 20px 16px; color: var(--sub); font-size: 15px; }
.faq .a a { word-break: break-all; }

/* changelog timeline */
.cl-table td:first-child { font-family: var(--mono); color: var(--accent); white-space: nowrap; }
.cl-table td:nth-child(2) { font-family: var(--mono); white-space: nowrap; }

/* sources */
.src-list { margin: 0; padding: 0; list-style: none; }
.src-list li { padding: 12px 0; border-bottom: 1px dashed var(--line); color: var(--sub); font-size: 15px; }
.src-list li:last-child { border-bottom: none; }
.src-list .u { font-family: var(--mono); font-size: 13px; word-break: break-all; }
.src-list b { color: var(--text); }

/* footer */
footer { padding: 40px 0 46px; color: var(--mut); font-size: 13.5px; }
.foot-grid { display: flex; gap: 30px; flex-wrap: wrap; justify-content: space-between; }
footer a { color: var(--sub); }
.foot-note { margin-top: 22px; font-family: var(--mono); font-size: 12px; line-height: 1.9; }

/* 404 */
.p404 { min-height: 60vh; display: flex; align-items: center; justify-content: center; flex-direction: column; text-align: center; padding: 60px 20px; }
.p404 .code { font-family: var(--mono); font-size: 84px; color: var(--accent); font-weight: 700; }
.p404-links { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-top: 24px; }
.p404-links a { border: 1px solid var(--line); border-radius: 8px; padding: 10px 16px; min-height: 44px; display: inline-flex; align-items: center; color: var(--text); background: var(--panel); }
.p404-links a:hover { background: var(--panel-2); text-decoration: none; }

/* back to top */
#toTop {
  position: fixed; right: 22px; bottom: 26px; z-index: 40; width: 44px; height: 44px; border-radius: 10px;
  background: var(--accent); border: none; color: #ffffff; font-size: 18px;
  cursor: pointer; opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
#toTop.show { opacity: 1; pointer-events: auto; }
#toTop:hover { background: var(--accent-deep); }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .facts { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 30px; padding: 42px 0 46px; }
  .hero h1 { font-size: 32px; }
  .grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .burger { display: block; }
  .nav-links {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    background: rgba(255, 255, 255, 0.98); border-bottom: 1px solid var(--line);
    padding: 10px 20px 16px; flex-direction: column;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 8px; }
  .facts { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 44px 0; }
  .section h2 { font-size: 25px; }
  .cta-row .btn-primary, .cta-row .btn-ghost { flex: 1 1 100%; }
}
@media (max-width: 480px) {
  .wrap { padding: 0 18px; }
  .facts { grid-template-columns: 1fr 1fr; }
  .term-row { grid-template-columns: 1.4fr 0.6fr auto; }
}