/* ============== Variables & Reset ============== */
:root {
  --bg: #f7f5f0;
  --bg-soft: #fbfaf6;
  --card: #ffffff;
  --line: #e9e3d6;
  --line-soft: #f0ebe0;
  --ink: #14171e;
  --ink-2: #3a4256;
  --muted: #7c7a72;
  --primary: #10b981;
  --primary-deep: #047857;
  --primary-soft: rgba(16, 185, 129, 0.08);
  --accent: #c97b3f;
  --accent-soft: rgba(201, 123, 63, 0.08);
  --warn: #f59e0b;
  --warn-soft: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.08);
  --radius: 14px;
  --radius-lg: 22px;
  --radius-sm: 8px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171e;
    --bg-soft: #1a1f2a;
    --card: #1d2330;
    --line: #2a3140;
    --line-soft: #232a38;
    --ink: #f1efe8;
    --ink-2: #c5cad6;
    --muted: #8a8e99;
    --primary: #34d399;
    --primary-deep: #10b981;
    --primary-soft: rgba(52, 211, 153, 0.1);
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.serif { font-family: 'DM Serif Display', Georgia, serif; font-weight: 400; letter-spacing: -0.01em; }
.mono { font-family: 'JetBrains Mono', Consolas, monospace; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* ============== Layout ============== */
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
@media (min-width: 768px) { .wrap { padding: 0 32px; } }
section { padding: 72px 0; }
@media (min-width: 768px) { section { padding: 96px 0; } }
.view { display: none; }
.view.active { display: block; }

/* ============== Nav ============== */
nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line-soft);
}
nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; cursor: pointer; }
.brand .mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-deep) 100%);
  display: grid; place-items: center; color: white;
  box-shadow: 0 4px 12px rgba(16,185,129,0.25);
}
.nav-links { display: none; gap: 28px; font-size: 14px; color: var(--ink-2); }
.nav-links a { transition: color .2s; }
.nav-links a:hover { color: var(--primary); }
@media (min-width: 768px) { .nav-links { display: flex; } }

/* ============== Hero ============== */
.hero { padding: 120px 0 96px; position: relative; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse at top left, var(--primary-soft) 0%, transparent 50%),
              radial-gradient(ellipse at bottom right, var(--accent-soft) 0%, transparent 50%);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 820px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 500; color: var(--primary-deep);
  padding: 6px 14px; border-radius: 999px; background: var(--primary-soft);
  border: 1px solid color-mix(in srgb, var(--primary) 20%, transparent);
  margin-bottom: 24px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--primary); animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }
h1.hero-title {
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
h1.hero-title em { font-style: italic; color: var(--primary-deep); }
.hero-sub {
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--ink-2);
  max-width: 640px;
  margin-bottom: 36px;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px; border-radius: 10px;
  font-weight: 600; font-size: 15px;
  transition: all .2s; cursor: pointer; border: none;
}
.btn-primary { background: var(--primary); color: white; box-shadow: 0 4px 16px rgba(16,185,129,0.25); }
.btn-primary:hover { background: var(--primary-deep); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(16,185,129,0.35); }
.btn-ghost { background: transparent; color: var(--ink-2); border: 1px solid var(--line); }

/* 下载按钮 disabled 状态(后端返回 available=false 时) */
.is-disabled { opacity: .5; cursor: not-allowed !important; pointer-events: none; }
.btn-ghost:hover { color: var(--ink); border-color: var(--ink); }
.btn-danger { background: transparent; color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent); }
.btn-danger:hover { background: var(--danger-soft); border-color: var(--danger); }
.btn-sm { padding: 8px 14px; font-size: 13px; }
.meta-row { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 18px 28px; font-size: 13px; color: var(--muted); }
.meta-row span { display: inline-flex; align-items: center; gap: 6px; }

/* ============== Sections ============== */
.section-head { margin-bottom: 48px; }
.section-label { font-size: 12px; font-weight: 600; color: var(--primary-deep); text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 12px; display: inline-flex; align-items: center; gap: 8px; }
.section-label::before { content: ""; width: 24px; height: 1px; background: var(--primary); }
.section-title { font-size: clamp(28px, 4vw, 42px); line-height: 1.15; margin-bottom: 16px; max-width: 720px; }
.section-sub { color: var(--ink-2); max-width: 640px; font-size: 16px; }

/* ============== Feature grid ============== */
.feature-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 768px) { .feature-grid { grid-template-columns: 1fr 1fr; } }
.feat {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px;
  transition: all .25s;
}
.feat:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -10px rgba(0,0,0,0.08); border-color: var(--primary); }
.feat .icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center;
  background: var(--primary-soft); color: var(--primary-deep);
  margin-bottom: 18px;
}
.feat h3 { font-size: 18px; margin-bottom: 8px; }
.feat p { color: var(--ink-2); font-size: 14px; line-height: 1.6; }
.feat ul { list-style: none; margin-top: 14px; font-size: 13px; color: var(--ink-2); }
.feat ul li { padding: 4px 0; padding-left: 18px; position: relative; }
.feat ul li::before { content: "·"; position: absolute; left: 6px; color: var(--primary); font-weight: 700; }

/* ============== Highlight ============== */
.highlight { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 40px; }
@media (min-width: 768px) { .highlight { padding: 56px; } }
.highlight-grid { display: grid; grid-template-columns: 1fr; gap: 40px; align-items: center; }
@media (min-width: 768px) { .highlight-grid { grid-template-columns: 1fr 1fr; } }
.highlight-title { font-size: clamp(26px, 3.4vw, 34px); line-height: 1.2; margin-bottom: 18px; }
.highlight-sub { color: var(--ink-2); font-size: 16px; margin-bottom: 24px; }
.flow-card { background: var(--bg-soft); border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 24px; font-family: 'JetBrains Mono', monospace; font-size: 12.5px; line-height: 1.9; }
.flow-step { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 6px; }
.flow-step .num { color: var(--primary); font-weight: 600; min-width: 18px; }
.flow-arrow { text-align: center; color: var(--primary); margin: 4px 0; font-size: 14px; }

/* ============== Versions ============== */
.version-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 36px; position: relative; overflow: hidden;
}
.version-card.featured { border-color: var(--primary); box-shadow: 0 12px 40px -16px rgba(16,185,129,0.3); }
.version-card.featured::before {
  content: "推荐"; position: absolute; top: 18px; right: 18px;
  background: var(--primary); color: white; font-size: 11px; font-weight: 600;
  padding: 4px 10px; border-radius: 999px; letter-spacing: 0.05em;
}
.ver-name { font-size: 24px; margin-bottom: 6px; }
.ver-tag { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.ver-price { font-size: 32px; font-weight: 600; margin-bottom: 4px; }
.ver-price small { font-size: 14px; color: var(--muted); font-weight: 400; }
.ver-price .orig { font-size: 14px; color: var(--muted); text-decoration: line-through; margin-left: 8px; font-weight: 400; }
.ver-list { list-style: none; margin: 22px 0 28px; font-size: 14px; }
.ver-list li { padding: 8px 0; padding-left: 24px; position: relative; border-bottom: 1px dashed var(--line-soft); }
.ver-list li:last-child { border-bottom: none; }
.ver-list li::before { content: ""; position: absolute; left: 0; top: 13px; width: 14px; height: 14px; background: var(--primary-soft); border-radius: 50%; }
.ver-list li::after { content: ""; position: absolute; left: 4px; top: 16px; width: 6px; height: 3px; border-left: 1.5px solid var(--primary-deep); border-bottom: 1.5px solid var(--primary-deep); transform: rotate(-45deg); }
.ver-list li.muted { color: var(--muted); }
.ver-list li.muted::before { background: var(--line-soft); }
.ver-list li.muted::after { border-color: var(--muted); }
.ver-cta { display: block; text-align: center; width: 100%; padding: 14px; border-radius: 10px; font-weight: 600; font-size: 14px; transition: all .2s; }
.ver-cta.primary { background: var(--primary); color: white; }
.ver-cta.primary:hover { background: var(--primary-deep); }
.ver-cta.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.ver-cta.ghost:hover { border-color: var(--ink); }

.ver-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
@media (min-width: 768px) { .ver-grid { grid-template-columns: 1fr 1fr; } }

/* ============== Specs ============== */
.specs { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 640px) { .specs { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .specs { grid-template-columns: repeat(3, 1fr); } }
.spec { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.spec .k { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 6px; }
.spec .v { font-size: 16px; font-weight: 500; }

/* ============== FAQ ============== */
.faq { max-width: 760px; }
.faq details { border-bottom: 1px solid var(--line-soft); padding: 18px 0; }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; font-weight: 500; font-size: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 22px; color: var(--muted); transition: transform .2s; font-weight: 300; }
.faq details[open] summary::after { content: "−"; }
.faq p { margin-top: 12px; color: var(--ink-2); font-size: 14px; }

/* ============== Final CTA ============== */
.final-cta {
  background: linear-gradient(135deg, #0f2d24 0%, #0a1f18 100%);
  color: #f1efe8; border-radius: var(--radius-lg);
  padding: 56px 32px; text-align: center;
  position: relative; overflow: hidden;
}
.final-cta::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse at top, rgba(16,185,129,0.18) 0%, transparent 60%);
}
.final-cta .inner { position: relative; }
.final-cta h2 { font-size: clamp(28px, 4vw, 38px); margin-bottom: 14px; color: white; }
.final-cta p { color: rgba(255,255,255,0.7); max-width: 540px; margin: 0 auto 28px; font-size: 16px; }
.final-cta .btn-primary { background: var(--primary); color: white; }
.final-cta .btn-primary:hover { background: #34d399; }
.final-cta .btn-ghost { color: rgba(255,255,255,0.8); border-color: rgba(255,255,255,0.2); }
.final-cta .btn-ghost:hover { color: white; border-color: white; }

/* ============== Footer ============== */
footer { padding: 40px 0 60px; border-top: 1px solid var(--line-soft); font-size: 13px; color: var(--muted); }
footer .wrap { display: flex; flex-direction: column; gap: 12px; }
.footer-top { display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; align-items: center; }
footer a:hover { color: var(--ink); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
/* V0.1.16:工信部 ICP 备案号 — 法规要求网站底部展示
   跟工信部官网链接(target=_blank,rel=noopener noreferrer 安全)
   灰色小字 + 跟主内容 separator 上方分隔 */
.beian {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px;
  color: var(--muted);
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}
.beian-link {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}
.beian-link:hover {
  color: var(--ink-2);
  text-decoration: underline;
}

/* ============== Auth (login/register) ============== */

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: var(--bg); padding: 12px 20px; border-radius: 10px;
  font-size: 14px; opacity: 0; transition: all .3s; pointer-events: none; z-index: 100;
  box-shadow: 0 12px 32px -8px rgba(0,0,0,0.3);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { background: var(--primary-deep); }
.toast.error { background: var(--danger); }

/* ============== Static pages (privacy / terms / changelog / status / shortcuts) ============== */
.page-wrap { padding: 64px 0 80px; min-height: calc(100vh - 64px); }
.page-head { margin-bottom: 32px; }
.page-head h1 { font-size: clamp(28px, 4vw, 36px); margin-bottom: 8px; }
.page-head .meta { color: var(--muted); font-size: 13px; }
.prose { max-width: 720px; font-size: 15px; line-height: 1.75; }
.prose h2 { font-size: 20px; margin: 32px 0 12px; }
.prose h3 { font-size: 16px; margin: 24px 0 8px; color: var(--ink-2); }
.prose p { margin-bottom: 14px; color: var(--ink-2); }
.prose ul, .prose ol { margin: 8px 0 16px 20px; color: var(--ink-2); }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--ink); }
.prose code { background: var(--bg-soft); padding: 1px 6px; border-radius: 4px; font-size: 13px; }

.changelog-item { padding: 24px 0; border-bottom: 1px solid var(--line-soft); }
.changelog-item:last-child { border-bottom: none; }
.changelog-item .ver { display: inline-block; font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 600; color: var(--primary-deep); background: var(--primary-soft); padding: 2px 8px; border-radius: 4px; margin-bottom: 6px; }
.changelog-item .date { font-size: 12px; color: var(--muted); margin-left: 10px; }
.changelog-item h3 { font-size: 18px; margin-bottom: 8px; }
.changelog-item ul { margin-left: 18px; margin-top: 8px; color: var(--ink-2); font-size: 14px; }
.changelog-item ul li { margin-bottom: 4px; }
.tag-row { display: flex; gap: 6px; margin-top: 8px; }
.tag-row .tag-pill { font-size: 10px; padding: 2px 6px; border-radius: 4px; background: var(--bg-soft); color: var(--ink-2); border: 1px solid var(--line); }

.status-grid { display: grid; gap: 12px; }
.status-row { display: flex; align-items: center; gap: 16px; padding: 16px 20px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.status-row .name { font-weight: 500; flex: 1; }
.status-row .desc { font-size: 13px; color: var(--muted); flex: 2; }
.status-indicator { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 500; }
.status-indicator .dot { width: 8px; height: 8px; border-radius: 50%; }
.status-indicator.operational .dot { background: var(--primary); }
.status-indicator.degraded .dot { background: var(--warn); }
.status-indicator.outage .dot { background: var(--danger); }
.status-indicator.maintenance .dot { background: #94a3b8; }
.status-summary { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px; text-align: center; margin-bottom: 24px; }
.status-summary .big { font-size: 28px; font-weight: 600; margin-bottom: 4px; }
.status-summary .sub { color: var(--ink-2); }

.shortcut-table { display: grid; gap: 8px; }
.shortcut-row { display: flex; align-items: center; padding: 12px 16px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.shortcut-row .keys { display: flex; gap: 4px; min-width: 200px; }
.shortcut-row .keys kbd { display: inline-block; padding: 2px 8px; font-family: 'JetBrains Mono', monospace; font-size: 12px; background: var(--bg-soft); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px; color: var(--ink); }
.shortcut-row .desc { flex: 1; color: var(--ink-2); font-size: 14px; }

/* reveal */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* callout (about page) */
.callout { background: var(--primary-soft); border-left: 3px solid var(--primary); padding: 20px 24px; border-radius: var(--radius); margin: 16px 0 24px; }
.callout p { margin: 0 0 8px; color: var(--ink); font-size: 15px; line-height: 1.8; }
.callout p:last-child { margin-bottom: 0; }