/* 主页 / 隐私 / 条款 共用样式:白底营销风格,跟随系统深色模式(prefers-color-scheme) */

  :root { --blue: #0a84ff; --blue-d: #0066cc; --ink: #101418; --ink-2: #4b5560; --ink-3: #7b8590; --line: #e6eaf0;
          --soft: #f5f8fc; --sky: #eef7fd; --deep: #2f5fe6; --bg: #ffffff; --card: #ffffff; --top: rgba(255,255,255,.92);
          --hero: #eaf3ff; --pill: #eaf3ff; --pill-fg: #0066cc; --btn-s: #ffffff; --btn-s-b: #d5dbe3; --mock-bg: #0f1115; --pro: #fffaf0; --shadow: rgba(16,20,24,.10); }
  @media (prefers-color-scheme: dark) {          /* 跟随系统:未手动选亮色时用深色变量 */
    :root:not([data-theme="light"]) { --blue: #4a9eff; --blue-d: #6fb2ff; --ink: #eaeef2; --ink-2: #aab3bd; --ink-3: #7b8590; --line: #262b32;
            --soft: #13161b; --sky: #10161f; --bg: #0d0f12; --card: #161a20; --top: rgba(13,15,18,.9);
            --hero: #0f1a2b; --pill: #16233a; --pill-fg: #8fc1ff; --btn-s: #161a20; --btn-s-b: #2f353d; --pro: #1f1a10; --shadow: rgba(0,0,0,.45); }
  }
  :root[data-theme="dark"] { --blue: #4a9eff; --blue-d: #6fb2ff; --ink: #eaeef2; --ink-2: #aab3bd; --ink-3: #7b8590; --line: #262b32;
            --soft: #13161b; --sky: #10161f; --bg: #0d0f12; --card: #161a20; --top: rgba(13,15,18,.9);
            --hero: #0f1a2b; --pill: #16233a; --pill-fg: #8fc1ff; --btn-s: #161a20; --btn-s-b: #2f353d; --pro: #1f1a10; --shadow: rgba(0,0,0,.45); }       /* 手动选深色 */
  .theme-btn { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--btn-s-b); background: var(--btn-s); color: var(--ink-2); cursor: pointer; font-size: 15px; line-height: 1; padding: 0; }
  .theme-btn:hover { color: var(--ink); }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body { margin: 0; background: var(--bg); color: var(--ink); font-family: Inter, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; line-height: 1.5; -webkit-font-smoothing: antialiased; }
  a { color: var(--blue); text-decoration: none; }
  .wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
  /* header */
  .top { position: sticky; top: 0; z-index: 50; background: var(--top); backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid var(--line); }
  .top .wrap { display: flex; align-items: center; gap: 22px; height: 64px; }
  .logo { font-weight: 800; font-size: 18px; color: var(--ink); display: flex; align-items: center; gap: 8px; white-space: nowrap; }
  .logo small { font-weight: 500; font-size: 12px; color: var(--ink-3); }
  nav.mk { display: flex; gap: 4px; flex: 1; }
  nav.mk a { color: var(--ink-2); font-size: 14px; font-weight: 500; padding: 8px 12px; border-radius: 8px; white-space: nowrap; }
  nav.mk a:hover { background: var(--soft); color: var(--ink); }
  .top-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }
  .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 8px; padding: 11px 20px; font-size: 15px; font-weight: 700; cursor: pointer; border: 1px solid transparent; transition: transform .12s, background .12s, box-shadow .12s; white-space: nowrap; }
  .btn.p { background: var(--blue); color: #fff; box-shadow: 0 6px 18px rgba(10,132,255,.28); }
  .btn.p:hover { background: var(--blue-d); transform: translateY(-1px); }
  .btn.s { background: var(--btn-s); color: var(--ink); border-color: var(--btn-s-b); }
  .btn.s:hover { border-color: var(--ink-3); }
  .btn.sm { padding: 8px 14px; font-size: 13px; }
  .btn.ghost { background: transparent; color: var(--ink-2); border-color: transparent; font-weight: 600; }
  .btn.ghost:hover { background: var(--soft); }
  .avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--pill); color: var(--pill-fg); font-weight: 700; display: inline-flex; align-items: center; justify-content: center; font-size: 14px; border: 1px solid #cfe1ff; }
  select.lang { border: 1px solid var(--btn-s-b); border-radius: 8px; padding: 6px 8px; font-size: 13px; background: var(--btn-s); color: var(--ink-2); }
  /* hero */
  .hero { padding: 84px 0 40px; text-align: center; background: radial-gradient(1200px 500px at 50% -80px, var(--hero) 0%, rgba(255,255,255,0) 70%); }
  .eyebrow { display: inline-flex; gap: 8px; align-items: center; font-size: 13px; font-weight: 600; color: var(--pill-fg); background: var(--pill); border-radius: 999px; padding: 6px 14px; margin-bottom: 22px; }
  h1 { font-size: 60px; line-height: 1.12; font-weight: 800; letter-spacing: -0.02em; margin: 0 auto 20px; max-width: 900px; }
  h1 em { font-style: normal; color: var(--blue); }
  .lead { font-size: 19px; color: var(--ink-2); max-width: 720px; margin: 0 auto 30px; }
  .cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
  .note { margin-top: 14px; font-size: 13px; color: var(--ink-3); }
  /* product mock */
  .mock { margin: 54px auto 0; max-width: 1080px; border-radius: 16px; background: var(--mock-bg); box-shadow: 0 30px 80px var(--shadow), 0 0 0 1px rgba(128,128,128,.12); overflow: hidden; text-align: left; }
  .mock-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: #171a21; border-bottom: 1px solid #23272f; }
  .mock-bar i { width: 11px; height: 11px; border-radius: 50%; background: #3a3f4a; display: inline-block; }
  .mock-bar i:nth-child(1) { background: #ff5f57; } .mock-bar i:nth-child(2) { background: #febc2e; } .mock-bar i:nth-child(3) { background: #28c840; }
  .mock-tabs { margin-left: 18px; display: flex; gap: 6px; }
  .mock-tabs span { font-size: 12px; color: #9aa3ad; padding: 4px 10px; border-radius: 6px; background: #20242c; }
  .mock-tabs span.on { background: #21354d; color: #cfe3ff; box-shadow: inset 0 0 0 1px #3a6ea5; }
  .mock-body { display: grid; grid-template-columns: 1.15fr 1fr; gap: 0; position: relative; }
  .mock-body img { width: 100%; height: 100%; object-fit: cover; display: block; }
  .mock-sheet { background: #fff; padding: 14px 10px 0; overflow: hidden; }   /* 乐谱纸面保持白色 */
  .mock-sheet img { object-fit: contain; object-position: top; }
  /* 真实播放器 iframe 盖在占位图上,就绪后淡入;手机端不挂 iframe,只给「在线试玩」按钮 */
  .mock-live { position: absolute; inset: 0; opacity: 0; transition: opacity .6s ease; pointer-events: none; }
  .mock-live iframe { width: 100%; height: 100%; border: 0; display: block; background: #0d0d0d; }
  .mock.live .mock-live { opacity: 1; pointer-events: auto; }
  .mock.live .mock-body > img, .mock.live .mock-sheet { visibility: hidden; }
  .mock-play { display: none; position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); padding: 12px 24px;
    border-radius: 999px; background: #0066cc; color: #fff; font-weight: 600; font-size: 15px; text-decoration: none; box-shadow: 0 8px 24px rgba(0,0,0,.35); }
  .mock-cap { margin: 12px auto 0; max-width: 1080px; font-size: 13px; color: var(--ink-3); text-align: center; }
  .mock-cap a { color: var(--pill-fg); text-decoration: none; margin-left: 8px; white-space: nowrap; }
  @media (min-width: 901px) { .mock-body { aspect-ratio: 16 / 9; max-height: 640px; } .mock-sheet { height: 100%; } }
  .svgbox svg { width: 100%; height: auto; display: block; }
  /* stats */
  .stats { display: flex; justify-content: center; gap: 36px; flex-wrap: wrap; padding: 40px 0 10px; color: var(--ink-2); font-size: 14px; font-weight: 500; }
  .stats b { color: var(--ink); font-size: 22px; display: block; font-weight: 800; }
  /* sections */
  section { padding: 84px 0; }
  section.soft { background: var(--soft); }
  section.sky { background: var(--sky); }
  h2 { font-size: 40px; line-height: 1.2; font-weight: 800; letter-spacing: -0.015em; margin: 0 0 12px; text-align: center; color: var(--ink); }
  .sub2 { text-align: center; color: var(--ink-2); font-size: 17px; max-width: 700px; margin: 0 auto 46px; }
  .cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 28px 26px; box-shadow: 0 4px 16px var(--shadow); }
  .card .ic { font-size: 30px; margin-bottom: 14px; }
  .card h3 { margin: 0 0 8px; font-size: 19px; font-weight: 700; }
  .card p { margin: 0; color: var(--ink-2); font-size: 14.5px; line-height: 1.65; }
  .feat { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 34px 0; }
  .feat.rev .fx { order: 2; }
  .feat h3 { font-size: 30px; line-height: 1.25; font-weight: 800; margin: 0 0 12px; letter-spacing: -0.01em; }
  .feat p { color: var(--ink-2); font-size: 16px; margin: 0 0 16px; }
  .feat ul { margin: 0; padding: 0 0 0 18px; color: var(--ink-2); font-size: 15px; line-height: 1.9; }
  .fx { border-radius: 16px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 16px 40px var(--shadow); background: #fff; }
  .fx img { display: block; width: 100%; }
  .fx.dark { background: #0f1115; }
  .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: s; }
  .step { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 28px 26px; position: relative; }
  .step .n { width: 36px; height: 36px; border-radius: 50%; background: var(--blue); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
  .step h3 { margin: 0 0 8px; font-size: 18px; }
  .step p { margin: 0; color: var(--ink-2); font-size: 14.5px; line-height: 1.65; }
  .split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
  .panel { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 32px 30px; }
  .panel h3 { font-size: 24px; margin: 0 0 10px; font-weight: 800; }
  .panel p { color: var(--ink-2); margin: 0 0 18px; font-size: 15px; }
  .price { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 820px; margin: 0 auto; }
  .plan { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 30px 28px; }
  .plan.pro { border-color: #ffd36a; background: linear-gradient(180deg, var(--pro), var(--card)); }
  .plan .nm { font-weight: 700; color: var(--ink-3); font-size: 13px; letter-spacing: .04em; text-transform: uppercase; }
  .plan .amt { font-size: 40px; font-weight: 800; margin: 6px 0 14px; }
  .plan .amt small { font-size: 14px; color: var(--ink-3); font-weight: 500; }
  .plan ul { margin: 0 0 20px; padding: 0; list-style: none; color: var(--ink-2); font-size: 14.5px; line-height: 2; }
  .plan li::before { content: '✓  '; color: #1fa462; font-weight: 800; }
  .band { background: linear-gradient(120deg, #2f5fe6, #5b8dff); color: #fff; text-align: center; padding: 72px 0; }
  .band h2 { color: #fff; }
  .band p { opacity: .9; font-size: 17px; margin: 0 0 26px; }
  .band .btn.p { background: #fff; color: var(--deep); box-shadow: none; }
  footer.mk { background: #101418; color: #9aa3ad; padding: 48px 0 32px; font-size: 13px; }
  footer.mk .cols { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 28px; margin-bottom: 30px; }
  footer.mk h4 { color: #fff; font-size: 13px; margin: 0 0 10px; letter-spacing: .04em; }
  footer.mk a { color: #9aa3ad; display: block; line-height: 2; }
  footer.mk a:hover { color: #fff; }
  footer.mk .copy { border-top: 1px solid #23272f; padding-top: 18px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
  @media (max-width: 900px) {
    h1 { font-size: 38px; } .lead { font-size: 16px; } h2 { font-size: 28px; } section { padding: 56px 0; }
    .cards, .steps, .split, .price, .feat { grid-template-columns: 1fr; }
    .feat { gap: 24px; } .feat.rev .fx { order: 0; } .feat h3 { font-size: 24px; }
    .mock-body { grid-template-columns: 1fr; } .mock-sheet { max-height: 360px; } .mock-play { display: inline-block; }
    nav.mk { display: none; } .top .wrap { height: 58px; gap: 10px; } .logo small, #langSlot { display: none; } footer.mk .cols { grid-template-columns: 1fr 1fr; }
    .hero { padding: 48px 0 24px; } .stats { gap: 22px; }
    .hide-m { display: none !important; }
  }

  /* 语言未应用前隐藏可翻译文本(非中文访客),避免中文闪一下再变 */
  .i18n-pending [data-i18n] { visibility: hidden; }
  /* 法务页 */
  .legal { max-width: 820px; margin: 0 auto; padding: 48px 24px 80px; }
  .legal h1 { font-size: 34px; margin: 0 0 6px; text-align: left; }
  .legal .upd { color: var(--ink-3); font-size: 13px; margin-bottom: 28px; }
  .legal h2 { font-size: 20px; text-align: left; margin: 30px 0 8px; }
  .legal p, .legal li { color: var(--ink-2); font-size: 15px; line-height: 1.75; }
  .legal ul { padding-left: 20px; }
  .posts { display: grid; gap: 14px; }
  .post { display: block; border: 1px solid var(--line); background: var(--card); border-radius: 12px; padding: 16px 18px; color: inherit; }
  .post:hover { border-color: var(--blue); }
  .post .pt { font-weight: 700; font-size: 18px; }
  .post .pm { color: var(--ink-3); font-size: 12px; margin: 4px 0 6px; }
  .post p { margin: 0; color: var(--ink-2); font-size: 14px; }
  .legal article img { max-width: 100%; border-radius: 8px; }
  .legal pre { background: var(--soft); border: 1px solid var(--line); padding: 12px 14px; border-radius: 8px; overflow: auto; font-size: 13px; }
  .legal code { background: var(--soft); padding: 1px 5px; border-radius: 4px; font-size: 90%; }
  .legal pre code { background: none; padding: 0; }
  .legal table { border-collapse: collapse; margin: 10px 0; }
  .legal td, .legal th { border: 1px solid var(--line); padding: 6px 10px; font-size: 14px; }
  .legal blockquote { border-left: 3px solid var(--line); margin: 0; padding: 4px 14px; color: var(--ink-2); }
  .legal .todo { background: var(--pill); color: var(--pill-fg); border-radius: 8px; padding: 10px 14px; font-size: 13px; margin-bottom: 24px; }