/* 奇乐多官网 v1 · 纯静态零依赖（CSP: default-src 'self'） */
:root {
  --ink: #17202a;
  --ink-2: #4a5568;
  --ink-3: #8a94a6;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --bg-deep: #101828;
  --line: #e6eaf1;
  --brand: #2f5af5;
  --brand-deep: #1f3fd0;
  --brand-soft: #eef2ff;
  --teal: #0e9f8a;
  --amber: #b7791f;
  --red: #d64550;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 8px 24px rgba(16, 24, 40, .06);
  --font: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font); color: var(--ink);
  background: var(--bg); line-height: 1.7; font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }
img, svg { vertical-align: middle; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.small { font-size: 13px; color: var(--ink-3); }
.muted { color: var(--ink-2); }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
}
.nav-in { display: flex; align-items: center; gap: 28px; height: 60px; }
.logo { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 17px; color: var(--ink); }
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 28px; height: 28px; border-radius: 8px; flex: none;
  background: linear-gradient(135deg, var(--brand) 0%, #7c3aed 100%);
  display: inline-flex; align-items: center; justify-content: center;
}
.logo-mark svg { width: 16px; height: 16px; }
.nav-links { display: flex; gap: 22px; margin-left: 8px; }
.nav-links a { color: var(--ink-2); font-size: 14.5px; }
.nav-cta { margin-left: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 11px 22px; border-radius: 10px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: .15s;
  font-family: inherit; line-height: 1.2;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-deep); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn-sm { padding: 8px 16px; font-size: 14px; border-radius: 8px; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }

/* ---------- Hero ---------- */
.hero { background: var(--bg-deep); color: #fff; overflow: hidden; }
.hero-in { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; padding: 84px 0 72px; align-items: center; }
.hero h1 { font-size: 42px; line-height: 1.28; margin: 18px 0 14px; font-weight: 700; letter-spacing: .5px; }
.hero .sub { color: #b9c2d4; font-size: 17px; max-width: 34em; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 600;
  color: #9db4ff; background: rgba(47, 90, 245, .16); border: 1px solid rgba(47, 90, 245, .45);
  padding: 6px 14px; border-radius: 999px;
}
.hero .badge .dot { width: 7px; height: 7px; border-radius: 50%; background: #34d399; }
.hero-cta { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 13px; color: #7f8aa3; }

/* 演示窗（动图占位） */
.demo {
  border-radius: 16px; border: 1px solid rgba(255, 255, 255, .14);
  background: linear-gradient(160deg, #182238 0%, #131b2c 100%);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35); overflow: hidden;
}
.demo-bar { display: flex; gap: 6px; padding: 12px 14px; border-bottom: 1px solid rgba(255, 255, 255, .1); }
.demo-bar i { width: 10px; height: 10px; border-radius: 50%; background: #2c3852; }
.demo-bar i:first-child { background: #47546f; }
.demo-body { padding: 26px 26px 30px; min-height: 300px; display: flex; flex-direction: column; gap: 14px; }
.demo-line { height: 12px; border-radius: 6px; background: #232f4a; animation: pulse 2.4s ease-in-out infinite; }
.demo-line.w1 { width: 46%; } .demo-line.w2 { width: 78%; } .demo-line.w3 { width: 64%; }
.demo-line.accent { background: rgba(47, 90, 245, .55); }
@keyframes pulse { 0%, 100% { opacity: .55; } 50% { opacity: 1; } }
.demo-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 6px; }
.demo-tag {
  font-size: 12px; color: #aab6d3; border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 999px; padding: 4px 12px;
}
.demo-tag.ok { color: #6ee7b7; border-color: rgba(52, 211, 153, .4); }
.demo-caption { padding: 12px 18px; border-top: 1px solid rgba(255, 255, 255, .1); font-size: 12.5px; color: #7f8aa3; text-align: center; }

/* ---------- 通用 section ---------- */
.section { padding: 72px 0; }
.section.soft { background: var(--bg-soft); }
.sec-head { max-width: 620px; margin-bottom: 40px; }
.sec-kicker { font-size: 13px; font-weight: 700; letter-spacing: .12em; color: var(--brand); text-transform: uppercase; }
.sec-head h2 { font-size: 30px; margin: 10px 0 12px; line-height: 1.35; }
.sec-head p { color: var(--ink-2); margin: 0; }

/* ---------- S2 痛点对照 ---------- */
.vs { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.vs-card { border-radius: var(--radius); padding: 28px; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); }
.vs-card.bad { border-top: 3px solid var(--ink-3); }
.vs-card.good { border-top: 3px solid var(--teal); background: linear-gradient(180deg, #f0fdf9 0%, #fff 60%); }
.vs-card h3 { margin: 0 0 6px; font-size: 17px; display: flex; align-items: center; gap: 8px; }
.vs-card .tagline { font-size: 13px; color: var(--ink-3); margin-bottom: 16px; }
.vs-card ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 11px; }
.vs-card li { display: flex; gap: 10px; font-size: 14.5px; color: var(--ink-2); align-items: baseline; }
.vs-card li::before { content: ""; flex: none; width: 6px; height: 6px; border-radius: 50%; background: var(--ink-3); position: relative; top: -2px; }
.vs-card.good li::before { background: var(--teal); }
.vs-card li strong { color: var(--ink); font-weight: 600; }

/* ---------- S3 平台卡片墙 ---------- */
.wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.pcard { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 20px 18px; box-shadow: var(--shadow); }
.pcard-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.pcard-avatar {
  width: 34px; height: 34px; border-radius: 9px; flex: none; font-size: 15px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center; color: #fff;
}
.pcard-head .name { font-weight: 600; font-size: 15px; }
.pcard .title { font-size: 14px; color: var(--ink); margin: 0 0 8px; line-height: 1.55; }
.pcard .meta { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-size: 12px; color: var(--ink-2); background: var(--bg-soft); border: 1px solid var(--line); padding: 3px 9px; border-radius: 999px; }
.chip.src { background: var(--brand-soft); color: var(--brand-deep); border-color: transparent; }

/* ---------- S4 矩阵表 ---------- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 640px; }
th, td { text-align: left; padding: 13px 18px; border-bottom: 1px solid var(--line); }
th { font-size: 13px; color: var(--ink-3); font-weight: 600; letter-spacing: .04em; background: var(--bg-soft); }
tr:last-child td { border-bottom: none; }
td .plat { display: flex; align-items: center; gap: 9px; font-weight: 600; }
.status { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--amber); }
.status.beta { color: var(--amber); }
.status.beta::before { background: #f6c76a; }

/* ---------- S5 三承诺 ---------- */
.promise { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pm-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.pm-num { font-size: 13px; font-weight: 700; color: var(--brand); letter-spacing: .1em; }
.pm-card h3 { margin: 8px 0 8px; font-size: 17px; }
.pm-card p { margin: 0 0 14px; font-size: 14px; color: var(--ink-2); }
.pm-card a { font-size: 13.5px; }

/* ---------- S6 定价 ---------- */
.pricing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.price-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 28px; box-shadow: var(--shadow); display: flex; flex-direction: column; position: relative; }
.price-card.hot { border: 2px solid var(--brand); }
.price-flag { position: absolute; top: -13px; left: 24px; background: var(--brand); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 999px; }
.price-card .plan { font-size: 15px; font-weight: 600; color: var(--ink-2); }
.price { display: flex; align-items: baseline; gap: 6px; margin: 12px 0 4px; }
.price .num { font-size: 40px; font-weight: 700; letter-spacing: -.02em; }
.price .unit { font-size: 14px; color: var(--ink-3); }
.price-card ul { list-style: none; margin: 18px 0 24px; padding: 0; display: flex; flex-direction: column; gap: 10px; font-size: 14px; color: var(--ink-2); flex: 1; }
.price-card li { display: flex; gap: 9px; align-items: baseline; }
.price-card li::before { content: "✓"; color: var(--teal); font-weight: 700; flex: none; }
.price-note { margin-top: 22px; font-size: 13px; color: var(--ink-3); text-align: center; }
.share-hint { margin-top: 14px; background: var(--brand-soft); border-radius: 10px; padding: 12px 16px; font-size: 13.5px; color: var(--brand-deep); text-align: center; }

/* ---------- S7 FAQ ---------- */
.faq { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); overflow: hidden; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:last-child { border-bottom: none; }
.faq summary {
  cursor: pointer; padding: 18px 22px; font-weight: 600; font-size: 15px;
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 20px; color: var(--ink-3); font-weight: 400; flex: none; transition: .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .a { padding: 0 22px 20px; color: var(--ink-2); font-size: 14.5px; max-width: 46em; }
.faq .a code { background: var(--bg-soft); border: 1px solid var(--line); padding: 1px 6px; border-radius: 5px; font-size: 13px; }

/* ---------- S7.5 公告条 ---------- */
.notice { display: flex; align-items: center; gap: 14px; background: var(--brand-soft); border: 1px solid rgba(47, 90, 245, .25); border-radius: var(--radius); padding: 14px 20px; font-size: 14px; color: var(--brand-deep); flex-wrap: wrap; }
.notice .date { font-weight: 600; flex: none; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-deep); color: #97a1b5; padding: 44px 0 36px; font-size: 13.5px; }
.footer a { color: #c3cbdc; }
.footer-grid { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer h4 { color: #fff; font-size: 14px; margin: 0 0 12px; }
.footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.footer .brand-line { margin-top: 30px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .1); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------- 法务/长文页 ---------- */
.doc { padding: 56px 0 72px; }
.doc-nav { font-size: 13.5px; color: var(--ink-3); margin-bottom: 26px; }
.doc h1 { font-size: 30px; margin: 0 0 6px; }
.doc .meta { color: var(--ink-3); font-size: 13.5px; margin-bottom: 34px; }
.doc article { max-width: 760px; }
.doc h2 { font-size: 19px; margin: 38px 0 12px; padding-top: 22px; border-top: 1px solid var(--line); }
.doc h2:first-of-type { border-top: none; padding-top: 0; }
.doc h2 .no { color: var(--brand); margin-right: 8px; font-variant-numeric: tabular-nums; }
.doc p, .doc li { color: var(--ink-2); font-size: 15px; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin-bottom: 8px; }
.doc strong { color: var(--ink); }

/* ---------- changelog ---------- */
.log { position: relative; padding-left: 26px; border-left: 2px solid var(--line); margin-left: 6px; }
.log-item { position: relative; padding: 0 0 34px; }
.log-item::before { content: ""; position: absolute; left: -33px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 3px solid var(--brand); }
.log-item .date { font-size: 13px; color: var(--ink-3); font-weight: 600; }
.log-item h3 { margin: 4px 0 8px; font-size: 17px; }
.log-item p { color: var(--ink-2); font-size: 14.5px; margin: 0 0 10px; max-width: 46em; }
.log-item .tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* ---------- 下载页 ---------- */
.dl-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 30px; max-width: 760px; }
.dl-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.dl-row:last-of-type { border-bottom: none; }
.dl-name { font-weight: 600; font-size: 15px; }
.dl-hash { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; color: var(--ink-3); word-break: break-all; margin-top: 4px; }
.code-block {
  background: var(--bg-deep); color: #d5dded; border-radius: 10px; padding: 15px 18px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px;
  overflow-x: auto; white-space: pre; margin: 10px 0;
}

/* ---------- 404 ---------- */
.center { text-align: center; padding: 110px 24px; }
.center h1 { font-size: 56px; margin: 0 0 8px; color: var(--ink); }
.center p { color: var(--ink-2); margin: 0 0 28px; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero-in { grid-template-columns: 1fr; padding: 56px 0 48px; gap: 36px; }
  .hero h1 { font-size: 32px; }
  .wall, .promise, .pricing { grid-template-columns: 1fr; }
  .vs { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}