/* ============================================================
   项目合集 · 站点样式
   风格：浅色、规整、留白充足 —— 企业官网基调
   ============================================================ */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --surface: #ffffff;          /* 卡片 / 按钮 / 表单底色 */
  --surface-head: rgba(255, 255, 255, 0.9);
  --ink: #0f172a;
  --ink-2: #475569;
  --ink-3: #8a97ac;
  --line: #e4e9f0;
  --line-strong: #cbd5e1;
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --deep: #0f172a;             /* 深色块：公告条、页脚 */
  --deep-ink: #94a3b8;
  --deep-ink-strong: #e2e8f0;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 32px -16px rgba(15, 23, 42, 0.22);
}

/* 深色主题：换一组变量值就行 */
html[data-theme='dark'] {
  --bg: #0d1420;
  --bg-soft: #131c2b;
  --surface: #172234;
  --surface-head: rgba(13, 20, 32, 0.88);
  --ink: #e6edf7;
  --ink-2: #a7b6cc;
  --ink-3: #7c8ca5;
  --line: #22314a;
  --line-strong: #33456b;
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --deep: #080e17;
  --deep-ink: #8d9cb3;
  --deep-ink-strong: #dbe3ef;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 12px 32px -16px rgba(0, 0, 0, 0.65);
}

/* 切主题时只过渡颜色，避免布局抖动 */
body,
.header,
.card,
.btn,
.section-alt,
.about-item,
.modal,
.footer,
.announce {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { line-height: 1.25; }

a { color: inherit; }

.wrap {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------------------------------------------------------------- 公告条 */

.announce {
  background: var(--deep);
  color: var(--deep-ink);
  font-size: 13px;
  letter-spacing: 0.2px;
}
.announce .wrap { padding-top: 8px; padding-bottom: 8px; text-align: center; }

/* ---------------------------------------------------------------- 导航 */

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--surface-head);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-mark {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--primary), #0ea5e9);
}

.nav { display: flex; gap: 26px; margin-right: auto; }
.nav a {
  font-size: 14.5px;
  color: var(--ink-2);
  text-decoration: none;
  transition: color 0.15s;
}
.nav a:hover { color: var(--ink); }

.header-side { display: flex; align-items: center; gap: 16px; }
.header-meta { font-size: 13px; color: var(--ink-3); }

/* 深浅色切换按钮 */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  font-size: 16px;
  line-height: 1;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.theme-toggle:hover {
  background: var(--bg-soft);
  color: var(--ink);
}

/* ---------------------------------------------------------------- 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover { background: var(--bg-soft); }

.btn.primary {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}
.btn.primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }

.btn.ghost { background: transparent; }
.btn.ghost:hover { background: var(--bg-soft); }

.btn-lg { padding: 12px 26px; font-size: 15px; }

.btn[aria-disabled='true'] {
  opacity: 0.45;
  pointer-events: none;
}

.btn:disabled { opacity: 0.55; pointer-events: none; }

/* ---------------------------------------------------------------- Hero */

.hero { padding: 88px 0 72px; }

.hero-label {
  margin: 0 0 18px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
}

.hero-title {
  max-width: 820px;
  margin: 0 0 22px;
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.hero-sub {
  max-width: 620px;
  margin: 0 0 34px;
  font-size: 18px;
  color: var(--ink-2);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  margin-top: 56px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.stat { display: flex; flex-direction: column; }
.stat b { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.stat span { font-size: 13px; color: var(--ink-3); }

/* ---------------------------------------------------------------- 区块 */

.section { padding: 72px 0; border-top: 1px solid var(--line); }

.section-alt {
  background: var(--bg-soft);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 34px;
}

.section-head h2 {
  margin: 0 0 6px;
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-head p { margin: 0; font-size: 15.5px; color: var(--ink-2); }

/* ---------------------------------------------------------------- 筛选 */

.filters { display: flex; gap: 8px; flex-wrap: wrap; }

.chip {
  padding: 7px 16px;
  font-family: inherit;
  font-size: 14px;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.chip:hover { border-color: var(--line-strong); }
.chip.active {
  color: #fff;
  background: var(--ink);
  border-color: var(--ink);
}

/* ---------------------------------------------------------------- 产品网格 */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 20px;
}

.loading {
  grid-column: 1 / -1;
  padding: 56px;
  text-align: center;
  color: var(--ink-3);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: border-color 0.18s, box-shadow 0.18s, transform 0.18s;
}
.card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* 顶部色条在浅色风格里显得花哨，去掉 */
.card-top { display: none; }

.card-body { flex: 1; padding: 22px 22px 18px; }

.card-head { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 14px; }

.symbol {
  flex: none;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  border-radius: 10px;
}

.card-head h3 {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.card-head .ver { font-size: 12.5px; font-weight: 500; color: var(--ink-3); }
.card-head .platform { margin: 3px 0 0; font-size: 13px; color: var(--ink-3); }

.tagline {
  margin: 0 0 14px;
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.6;
}

.tags { display: flex; flex-wrap: wrap; gap: 6px; }

.tag {
  padding: 3px 10px;
  font-size: 12px;
  color: var(--ink-2);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 22px;
  border-top: 1px solid var(--line);
}

.size { font-size: 13px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.card-meta { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.mirror-note { font-size: 12px; color: var(--primary); }
.card-actions { display: flex; gap: 8px; }

/* 纯网页产品卡片：没有安装包，整张卡片点进去就是游戏 */
.card-web:hover { border-color: var(--primary); }
.card-web .size { color: var(--primary); font-weight: 500; }

/* ---------------------------------------------------------------- 关于 */

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.about-item {
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.about-item h4 { margin: 0 0 8px; font-size: 16px; font-weight: 600; }
.about-item p { margin: 0; font-size: 14.5px; color: var(--ink-2); }

/* ---------------------------------------------------------------- 弹窗 */

.modal-host:empty { display: none; }

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.45);
  animation: fade-in 0.18s ease both;
}

.modal {
  width: min(620px, 100%);
  max-height: 86vh;
  overflow: auto;
  background: var(--surface);
  border-radius: 14px;
  box-shadow: 0 32px 80px -32px rgba(15, 23, 42, 0.45);
  animation: fade-up 0.22s ease both;
}

.modal-top { display: none; }

.modal-inner { padding: 30px; }

.modal-head { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 18px; }
.modal-head .symbol { width: 52px; height: 52px; font-size: 15px; }
.modal-head h2 { margin: 0; font-size: 22px; font-weight: 700; letter-spacing: -0.02em; }
.modal-head .meta { margin: 4px 0 0; font-size: 13.5px; color: var(--ink-3); }

.modal-tagline { margin: 0 0 22px; font-size: 15.5px; color: var(--ink-2); }

.modal h4 {
  margin: 0 0 12px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.highlights { list-style: none; margin: 0 0 20px; padding: 0; display: grid; gap: 10px; }

.highlights li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  color: var(--ink-2);
}
.highlights li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--primary);
}

.modal-note {
  margin: 0 0 20px;
  padding: 14px 16px;
  font-size: 14px;
  color: var(--ink-2);
  background: var(--bg-soft);
  border-left: 3px solid var(--primary);
  border-radius: 6px;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.modal-actions .btn { padding: 10px 22px; font-size: 14.5px; }
.modal-actions .spacer { flex: 1; }

/* ---------------------------------------------------------------- 页脚 */

.footer {
  background: var(--deep);
  color: var(--deep-ink);
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-top: 56px;
  padding-bottom: 44px;
}

.footer-brand .brand { color: #fff; }
.footer-brand p { margin: 14px 0 0; max-width: 300px; font-size: 13.5px; color: #94a3b8; }

.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col h4 {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--deep-ink-strong);
}
.footer-col a {
  font-size: 14px;
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.15s;
}
.footer-col a:hover { color: #fff; }
.footer-col span { font-size: 13.5px; color: #94a3b8; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 22px;
  padding-bottom: 30px;
  font-size: 13px;
  color: #64748b;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ---------------------------------------------------------------- 动画 */

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes fade-up {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 860px) {
  .nav { display: none; }
  .header-meta { display: none; }
  .hero { padding: 56px 0 48px; }
  .hero-stats { gap: 32px; }
  .section { padding: 52px 0; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 16px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 600px) {
  .wrap { padding: 0 20px; }
  .grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}