/* ==========================================================================
   实用工具箱 · 官网样式
   深色主题（靛蓝 → 紫罗兰渐变），响应式，无外部依赖
   ========================================================================== */
:root {
  --bg: #0b0d16;
  --bg2: #11142a;
  --card: #151a33;
  --card2: #1a1f3d;
  --line: #262c52;
  --text: #e8eaf6;
  --muted: #9aa3c7;
  --indigo: #6366f1;
  --violet: #8b5cf6;
  --purple: #a855f7;
  --cyan: #22d3ee;
  --green: #34d399;
  --amber: #fbbf24;
  --grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 55%, #a855f7 100%);
  --grad-soft: linear-gradient(135deg, rgba(99, 102, 241, .16), rgba(139, 92, 246, .10));
  --radius: 14px;
  --shadow: 0 10px 40px rgba(0, 0, 0, .45);
  --font: "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  --mono: Consolas, "Cascadia Mono", "Courier New", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.65;
  overflow-x: hidden;
}
::selection { background: rgba(139, 92, 246, .4); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
code { font-family: var(--mono); font-size: .92em; color: var(--cyan); background: rgba(34, 211, 238, .08); padding: 1px 5px; border-radius: 4px; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 22px; }
h2 { font-size: 30px; font-weight: 700; letter-spacing: .5px; }
h3 { font-size: 16px; }
.sec-sub { color: var(--muted); margin: 10px 0 34px; }
.badge { display: inline-block; padding: 3px 11px; border-radius: 999px; font-size: 12px; font-weight: 600; border: 1px solid var(--line); background: var(--card2); color: var(--muted); }
.badge.accent { color: #fff; border-color: transparent; background: var(--grad); }
.note { background: rgba(251, 191, 36, .07); border: 1px solid rgba(251, 191, 36, .3); border-radius: 10px; padding: 12px 16px; font-size: 13px; color: #fde68a; margin-top: 16px; }
.note b { color: var(--amber); }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; border-radius: 999px; font-size: 15px; font-weight: 600; transition: transform .15s, box-shadow .2s, background .2s; border: none; cursor: pointer; font-family: inherit; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 24px rgba(124, 92, 246, .4); }
.btn-primary:hover { box-shadow: 0 12px 32px rgba(124, 92, 246, .55); }
.btn-ghost { background: rgba(255, 255, 255, .06); color: var(--text); border: 1px solid var(--line); }
.btn-ghost:hover { background: rgba(255, 255, 255, .11); }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-block { width: 100%; justify-content: center; }

/* ---------- 顶部导航 ---------- */
nav { position: sticky; top: 0; z-index: 100; background: rgba(11, 13, 22, .84); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; gap: 18px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; flex-shrink: 0; }
.logo img { width: 32px; height: 32px; border-radius: 9px; }
.logo small { display: block; font-size: 11px; color: var(--muted); font-weight: 500; letter-spacing: .5px; }
.nav-links { display: flex; gap: 24px; font-size: 14px; color: var(--muted); }
.nav-links a:hover { color: var(--text); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
#navToggle { display: none; background: none; border: 1px solid var(--line); color: var(--text); border-radius: 8px; padding: 6px 11px; font-size: 17px; cursor: pointer; }
@media (max-width: 960px) {
  .nav-links { display: none; position: absolute; top: 62px; left: 0; right: 0; flex-direction: column; background: var(--bg2); padding: 16px 22px; border-bottom: 1px solid var(--line); gap: 14px; }
  .nav-links.open { display: flex; }
  #navToggle { display: block; }
  .nav-cta .btn { display: none; }
  h2 { font-size: 24px; }
}

/* ---------- Hero ---------- */
.hero { position: relative; padding: 68px 0 74px; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(900px 480px at 72% -12%, rgba(124, 92, 246, .28), transparent 60%), radial-gradient(700px 420px at 6% 108%, rgba(34, 211, 238, .12), transparent 60%); pointer-events: none; }
.hero-inner { position: relative; max-width: 760px; }
.hero h1 { font-size: 46px; line-height: 1.22; font-weight: 800; letter-spacing: .5px; margin-top: 16px; }
.hero h1 .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .tagline { color: var(--muted); font-size: 17px; margin: 18px 0 6px; }
.hero .tags { margin: 18px 0 26px; display: flex; flex-wrap: wrap; gap: 8px; }
.hero .tags .badge { font-size: 13px; padding: 5px 13px; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-meta { margin-top: 18px; color: var(--muted); font-size: 13px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 40px; position: relative; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.stat b { display: block; font-size: 22px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: var(--muted); font-size: 12.5px; }
@media (max-width: 900px) {
  .hero h1 { font-size: 31px; }
  .hero { padding: 44px 0 50px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 通用 section ---------- */
section { padding: 64px 0; }
section.alt { background: var(--bg2); }
.sec-head { text-align: center; max-width: 700px; margin: 0 auto; }

/* ---------- 产品卡片 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.app-card { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 24px; transition: transform .2s, border-color .2s, box-shadow .2s; position: relative; overflow: hidden; }
.app-card::after { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--app-accent, var(--grad)); opacity: .9; }
.app-card:hover { transform: translateY(-5px); border-color: rgba(139, 92, 246, .5); box-shadow: var(--shadow); }
.app-card .top { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.app-card .top img { width: 52px; height: 52px; border-radius: 13px; flex-shrink: 0; }
.app-card h3 { font-size: 17px; line-height: 1.35; }
.app-card .ver { color: var(--muted); font-size: 12px; }
.app-card .slogan { color: #cdd3ee; font-size: 14px; margin-bottom: 14px; min-height: 44px; }
.chips { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 16px; }
.chip { font-size: 11.5px; padding: 3px 10px; border-radius: 999px; background: var(--grad-soft); border: 1px solid var(--line); color: #c7cdf0; }
.app-card .meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 12.5px; border-top: 1px dashed var(--line); padding-top: 12px; margin-top: auto; }
.app-card .actions { display: flex; gap: 10px; margin-top: 16px; }
.app-card .actions .btn { flex: 1; justify-content: center; }
@media (max-width: 1020px) { .app-grid { grid-template-columns: 1fr; } .app-card .slogan { min-height: 0; } }

/* ---------- 特性网格 ---------- */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.f-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; transition: transform .2s, border-color .2s; }
.f-card:hover { transform: translateY(-4px); border-color: rgba(139, 92, 246, .5); }
.f-ic { width: 40px; height: 40px; border-radius: 10px; background: var(--grad-soft); border: 1px solid var(--line); display: grid; place-items: center; font-size: 19px; margin-bottom: 12px; }
.f-card h3 { font-size: 15.5px; margin-bottom: 6px; }
.f-card p { color: var(--muted); font-size: 13px; }
@media (max-width: 1000px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }

/* ---------- 下载区 ---------- */
.dl-list { display: flex; flex-direction: column; gap: 14px; }
.dl-row { display: grid; grid-template-columns: 1fr auto; gap: 18px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.dl-row:hover { border-color: rgba(139, 92, 246, .45); }
.dl-row .name { font-weight: 700; font-size: 15.5px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.dl-row .file { font-family: var(--mono); font-size: 12.5px; color: var(--muted); margin-top: 4px; word-break: break-all; }
.dl-row .sha { font-family: var(--mono); font-size: 11.5px; color: #7f88ad; margin-top: 6px; word-break: break-all; }
.dl-row .right { text-align: right; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.dl-row .size { color: var(--muted); font-size: 12.5px; }
@media (max-width: 720px) {
  .dl-row { grid-template-columns: 1fr; }
  .dl-row .right { align-items: stretch; text-align: left; }
  .dl-row .right .btn { justify-content: center; }
}

/* ---------- 支持作者 ---------- */
.support-wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 22px; align-items: start; }
.support-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.support-card h3 { font-size: 17px; margin-bottom: 6px; }
.support-card p { color: var(--muted); font-size: 13.5px; }
.qr-card { text-align: center; }
.qr-card img { width: 200px; height: 200px; object-fit: contain; border-radius: 12px; background: #fff; padding: 6px; margin: 12px auto 8px; }
.qr-card .hint { color: var(--muted); font-size: 12.5px; }
.chips-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
@media (max-width: 900px) { .support-wrap { grid-template-columns: 1fr; } }

/* ---------- 常见问题 ---------- */
.faq-list { max-width: 900px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
details.qa { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; }
details.qa[open] { border-color: rgba(139, 92, 246, .45); background: var(--card2); }
details.qa summary { cursor: pointer; font-weight: 600; font-size: 15px; list-style: none; display: flex; justify-content: space-between; gap: 14px; align-items: center; }
details.qa summary::-webkit-details-marker { display: none; }
details.qa summary::after { content: "＋"; color: var(--violet); font-weight: 700; flex-shrink: 0; }
details.qa[open] summary::after { content: "－"; }
details.qa .a { color: var(--muted); font-size: 14px; margin-top: 12px; line-height: 1.75; }

/* ---------- 表格 ---------- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 520px; }
table.tbl th, table.tbl td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.tbl th { background: var(--card2); color: var(--muted); font-weight: 600; font-size: 12.5px; white-space: nowrap; }
table.tbl td code { font-family: var(--mono); font-size: 12px; }
table.tbl tr:last-child td { border-bottom: none; }
.tbl-block { margin-top: 26px; }
.tbl-block > h3 { font-size: 17px; margin-bottom: 4px; }
.tbl-block > .sub { color: var(--muted); font-size: 13px; margin-bottom: 12px; }

/* ---------- 代码块 ---------- */
.cmd-block { position: relative; background: #0b0e1d; border: 1px solid var(--line); border-radius: 10px; padding: 14px 52px 14px 16px; font-family: var(--mono); font-size: 12.5px; color: #c7d2fe; overflow-x: auto; white-space: pre; margin: 12px 0; }
.copy-btn { position: absolute; top: 10px; right: 10px; background: var(--card2); color: var(--muted); border: 1px solid var(--line); border-radius: 6px; font-size: 11px; padding: 3px 9px; cursor: pointer; font-family: inherit; }
.copy-btn:hover { color: var(--text); }
.copy-btn.ok { color: var(--green); border-color: var(--green); }

/* ---------- 产品详情页 ---------- */
.crumb { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.crumb a:hover { color: var(--text); }
.app-hero { display: grid; grid-template-columns: 1.25fr .75fr; gap: 30px; align-items: start; }
.app-hero .head { display: flex; gap: 18px; align-items: center; }
.app-hero .head img { width: 76px; height: 76px; border-radius: 18px; flex-shrink: 0; }
.app-hero h1 { font-size: 32px; font-weight: 800; line-height: 1.25; }
.app-hero .verline { color: var(--muted); font-size: 13px; margin-top: 6px; }
.app-hero .tagline { font-size: 17px; margin: 18px 0 0; color: #d6dbf5; }
.app-hero .summary { color: var(--muted); font-size: 14.5px; margin-top: 12px; }
.app-hero .actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.side-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.side-card h3 { font-size: 15px; margin-bottom: 12px; }
.kv { display: flex; justify-content: space-between; gap: 12px; font-size: 13px; padding: 7px 0; border-bottom: 1px dashed var(--line); }
.kv:last-of-type { border-bottom: none; }
.kv span { color: var(--muted); flex-shrink: 0; }
.kv b { font-weight: 600; text-align: right; word-break: break-all; }
.kv b.mono { font-family: var(--mono); font-size: 11.5px; }
@media (max-width: 900px) {
  .app-hero { grid-template-columns: 1fr; }
  .app-hero h1 { font-size: 25px; }
  .app-hero .head img { width: 62px; height: 62px; }
}

/* ---------- 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.step { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 18px 18px; }
.step .no { position: absolute; top: -16px; left: 18px; width: 34px; height: 34px; border-radius: 50%; background: var(--grad); display: grid; place-items: center; font-weight: 800; font-size: 15px; box-shadow: 0 4px 14px rgba(124, 92, 246, .4); }
.step h3 { font-size: 15.5px; margin: 4px 0 8px; }
.step p { color: var(--muted); font-size: 13px; }
@media (max-width: 1000px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* ---------- 页脚 ---------- */
footer { border-top: 1px solid var(--line); background: var(--bg2); padding: 40px 0 28px; }
.foot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.foot-grid h4 { font-size: 14px; margin-bottom: 10px; }
.foot-grid div, .foot-grid a { color: var(--muted); font-size: 13px; line-height: 1.9; }
.foot-grid a:hover { color: var(--text); }
.foot-note { color: #7f88ad; font-size: 12.5px; border-top: 1px solid var(--line); margin-top: 26px; padding-top: 18px; text-align: center; }
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr; } }

/* ---------- 404 ---------- */
.err-wrap { min-height: 62vh; display: grid; place-items: center; text-align: center; padding: 60px 22px; }
.err-code { font-size: 92px; font-weight: 800; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.err-wrap p { color: var(--muted); margin: 14px 0 26px; }

/* ---------- 其它 ---------- */
.center { text-align: center; }
.mt24 { margin-top: 24px; }
.toast { position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 20px); background: var(--card2); border: 1px solid var(--line); color: var(--text); padding: 10px 20px; border-radius: 999px; font-size: 13.5px; opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s; z-index: 200; box-shadow: var(--shadow); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }