/* ============================================================
   OmniPlay 站点样式
   深色为默认,prefers-color-scheme 自动切浅色
   ============================================================ */

:root {
  --bg: #0b0d14;
  --bg-alt: #0e111a;
  --surface: #141824;
  --surface-2: #1a1f2e;
  --border: rgba(255, 255, 255, .09);
  --border-strong: rgba(255, 255, 255, .16);
  --text: #e9ebf2;
  --text-muted: #99a2b8;
  --text-dim: #6b7488;

  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --accent-soft: rgba(99, 102, 241, .14);

  --radius: 14px;
  --radius-lg: 20px;
  --wrap: 1080px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
          "Noto Sans CJK SC", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --bg-alt: #f7f8fc;
    --surface: #ffffff;
    --surface-2: #f2f4f9;
    --border: rgba(16, 20, 35, .10);
    --border-strong: rgba(16, 20, 35, .18);
    --text: #141824;
    --text-muted: #5a6274;
    --text-dim: #858d9e;
    --accent-soft: rgba(99, 102, 241, .10);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.25; margin: 0; letter-spacing: -.02em; font-weight: 650; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .12em .42em;
}

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* ── 导航 ──────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 650; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  position: relative;
  flex: none;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 0; margin: auto;
  width: 0; height: 0;
  border-left: 8px solid #fff;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  transform: translateX(1.5px);
}
.brand-name { font-size: 16px; letter-spacing: -.01em; }
.nav-links { display: flex; gap: 26px; font-size: 14.5px; color: var(--text-muted); }
.nav-links a { transition: color .16s ease; }
.nav-links a:hover { color: var(--text); }

/* ── Hero ──────────────────────────────────────────── */
.hero { position: relative; padding: 92px 0 76px; overflow: hidden; }
.eyebrow {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 560;
  letter-spacing: .04em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
  border-radius: 999px;
  padding: 5px 13px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(32px, 5.6vw, 54px);
  font-weight: 700;
  letter-spacing: -.035em;
  margin-bottom: 22px;
}
.grad {
  background: linear-gradient(120deg, var(--accent) 10%, var(--accent-2) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  font-size: clamp(16px, 2vw, 18.5px);
  color: var(--text-muted);
  max-width: 620px;
  margin-bottom: 14px;
}
.hero-note {
  font-size: 15px;
  color: var(--text-dim);
  max-width: 620px;
  padding-left: 14px;
  border-left: 2px solid var(--border-strong);
}
.hero-glow {
  position: absolute;
  top: -220px; left: 50%;
  width: 900px; height: 560px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center,
    rgba(99, 102, 241, .20), rgba(139, 92, 246, .07) 45%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* ── 按钮 ──────────────────────────────────────────── */
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.cta-row.center { justify-content: center; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 22px;
  border-radius: 11px;
  font-size: 15px;
  font-weight: 570;
  border: 1px solid transparent;
  transition: transform .14s ease, background .16s ease, border-color .16s ease, opacity .16s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 6px 20px -8px rgba(99, 102, 241, .7);
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { background: var(--surface-2); }
.btn[disabled], .btn[aria-disabled="true"] {
  opacity: .5; cursor: not-allowed; box-shadow: none;
}

/* ── 区块 ──────────────────────────────────────────── */
.section { padding: 76px 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.section-head { margin-bottom: 40px; }
.section-head h2 { font-size: clamp(24px, 3.4vw, 32px); margin-bottom: 10px; }
.section-sub { color: var(--text-muted); font-size: 15.5px; max-width: 560px; }

/* ── 下载卡 ────────────────────────────────────────── */
.download-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
}
.dl-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 14.5px;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 26px;
}
.tag {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 9px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .01em;
}
.tag-version { background: var(--accent-soft); color: var(--accent); }
.tag-pre { background: rgba(245, 158, 11, .16); color: #d97706; }
@media (prefers-color-scheme: dark) {
  .tag-pre { color: #fbbf24; }
}
.dl-buttons { display: flex; gap: 12px; flex-wrap: wrap; }
.dl-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  min-width: 186px;
  padding: 13px 20px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  transition: filter .16s ease, transform .14s ease;
}
.dl-btn:hover { filter: brightness(1.08); }
.dl-btn:active { transform: translateY(1px); }
.dl-btn-label { font-size: 15.5px; font-weight: 620; }
.dl-btn-sub { font-size: 12.5px; opacity: .82; font-weight: 450; }
.dl-foot { margin-top: 18px; font-size: 13.5px; color: var(--text-dim); }
.dl-foot a { color: var(--accent); }
.dl-foot a:hover { text-decoration: underline; }

.skeleton-line {
  display: inline-block;
  width: 190px; height: 15px;
  border-radius: 5px;
  background: linear-gradient(90deg,
    var(--surface-2) 25%, var(--border) 50%, var(--surface-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.3s infinite linear;
}
@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}

.empty-state {
  background: var(--surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 22px;
  width: 100%;
}
.empty-state-title { font-size: 15.5px; font-weight: 600; margin-bottom: 6px; }
.empty-state-body { font-size: 14px; color: var(--text-muted); }

/* ── 特性网格 ──────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(272px, 1fr));
  gap: 14px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color .18s ease, transform .18s ease;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
/* 内联 SVG 图标:不用字体符号,避免不同平台字形缺失 */
.card-icon {
  display: block;
  width: 36px; height: 36px;
  padding: 7px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 14px;
}
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card p { font-size: 14.2px; color: var(--text-muted); line-height: 1.65; }

/* ── 步骤 ──────────────────────────────────────────── */
.steps {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(258px, 1fr));
  gap: 20px;
  counter-reset: step;
}
.step-n {
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 13.5px;
  font-weight: 680;
  margin-bottom: 14px;
}
.steps h3 { font-size: 16px; margin-bottom: 8px; }
.steps p { font-size: 14.2px; color: var(--text-muted); line-height: 1.65; }

/* ── 路线图 ────────────────────────────────────────── */
.roadmap { display: grid; gap: 12px; }
.rm-item {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.rm-item p { font-size: 14.2px; color: var(--text-muted); line-height: 1.65; }
.rm-tag {
  display: inline-block;
  text-align: center;
  font-size: 12px;
  font-weight: 620;
  border-radius: 6px;
  padding: 3px 9px;
  white-space: nowrap;
}
.rm-done .rm-tag { background: rgba(16, 185, 129, .15); color: #059669; }
.rm-wip  .rm-tag { background: rgba(245, 158, 11, .16); color: #d97706; }
.rm-next .rm-tag { background: var(--surface-2); color: var(--text-dim); }
@media (prefers-color-scheme: dark) {
  .rm-done .rm-tag { color: #34d399; }
  .rm-wip  .rm-tag { color: #fbbf24; }
}

/* ── CTA 带 ────────────────────────────────────────── */
.cta-band-inner { text-align: center; }
.cta-band h2 { font-size: clamp(22px, 3.2vw, 30px); margin-bottom: 10px; }
.cta-band p { color: var(--text-muted); }

/* ── 页脚 ──────────────────────────────────────────── */
.footer { border-top: 1px solid var(--border); padding: 28px 0; }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13.5px;
  color: var(--text-dim);
}
.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--text); }

/* ── 响应式 ────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-links { gap: 18px; font-size: 14px; }
  .nav-links a:nth-child(3) { display: none; }
  .hero { padding: 64px 0 52px; }
  .section { padding: 56px 0; }
  .download-card { padding: 22px; }
  .dl-btn { flex: 1 1 100%; min-width: 0; }
  .rm-item { grid-template-columns: 1fr; gap: 10px; }
  .rm-tag { justify-self: start; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}