/* ============================================================
   下载页样式  style.css
   双主题 · 模块化 · 去AI同质化差异化细节
   ============================================================ */

/* ---------- 1. 主题变量：亮色 ---------- */
:root,
[data-theme="light"] {
  --bg: #FAFAF7;                /* 极浅暖灰背景，非纯白，避免廉价感 */
  --bg-elevated: #FFFFFF;       /* 卡片/面板背景 */
  --bg-subtle: #F2F1EC;         /* 次级背景 */
  --bg-hover: #ECEBE5;

  --text: #1A1A1F;              /* 主文字：近黑深灰 */
  --text-secondary: #5C5C66;    /* 次级文字 */
  --text-tertiary: #8E8E98;     /* 辅助小字 */
  --text-inverse: #FAFAF7;

  --accent: #2D5BFF;            /* 主题强调色（低饱和蓝） */
  --accent-soft: rgba(45, 91, 255, 0.08);
  --accent-hover: #1F47E0;

  --border: #E4E3DC;            /* 主边框 */
  --border-strong: #D2D1C9;

  --success: #2F8F5B;
  --success-soft: rgba(47, 143, 91, 0.10);
  --warning: #C77A12;
  --warning-soft: rgba(199, 122, 18, 0.10);
  --danger: #C8453B;
  --danger-soft: rgba(200, 69, 59, 0.10);

  /* 分层微阴影：亮色下通透、克制 */
  --shadow-xs: 0 1px 2px rgba(20, 20, 30, 0.04);
  --shadow-sm: 0 1px 3px rgba(20, 20, 30, 0.05), 0 1px 2px rgba(20, 20, 30, 0.03);
  --shadow-md: 0 4px 12px rgba(20, 20, 30, 0.06), 0 2px 4px rgba(20, 20, 30, 0.04);
  --shadow-lg: 0 12px 32px rgba(20, 20, 30, 0.08), 0 4px 12px rgba(20, 20, 30, 0.05);

  --scrollbar-thumb: rgba(60, 60, 70, 0.22);
  --scrollbar-track: transparent;
  --header-bg: rgba(250, 250, 247, 0.78);
}

/* ---------- 1. 主题变量：暗色 ---------- */
[data-theme="dark"] {
  --bg: #0E0F13;                /* 深黑微蓝灰，通透不暗沉 */
  --bg-elevated: #16171D;
  --bg-subtle: #1B1C23;
  --bg-hover: #22232B;

  --text: #ECEDEF;
  --text-secondary: #A2A4AD;
  --text-tertiary: #6E7079;
  --text-inverse: #0E0F13;

  --accent: #6B8AFF;            /* 暗色下主题色微调，不刺眼 */
  --accent-soft: rgba(107, 138, 255, 0.14);
  --accent-hover: #859DFF;

  --border: #26272F;
  --border-strong: #34353F;

  --success: #4FB07E;
  --success-soft: rgba(79, 176, 126, 0.14);
  --warning: #E0A24A;
  --warning-soft: rgba(224, 162, 74, 0.14);
  --danger: #E0655B;
  --danger-soft: rgba(224, 101, 91, 0.14);

  /* 暗色阴影更深但更收敛 */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.30);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35), 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.40), 0 2px 4px rgba(0, 0, 0, 0.28);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.50), 0 4px 12px rgba(0, 0, 0, 0.32);

  --scrollbar-thumb: rgba(160, 162, 175, 0.22);
  --scrollbar-track: transparent;
  --header-bg: rgba(14, 15, 19, 0.78);
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

/* 确保 hidden 属性不被 display:flex 等显式规则覆盖 */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 15px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
}

/* ---------- 2.5 页面展示图 ---------- */
.hero-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 28px;
}
.hero-text {
  flex: 1 1 240px;
  min-width: 0;
}
.hero-figure {
  flex: 0 0 300px;
  max-width: 100%;
  margin: 6px auto 36px;
}
.hero-figure .hero-image {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  background: var(--bg-subtle);
  opacity: 0;
  transition: opacity 0.6s ease;
}
.hero-figure .hero-image.is-loaded { opacity: 1; }
.hero-figure .hero-image-caption {
  font-size: 12px;
  color: var(--text-tertiary);
  text-align: center;
  margin-top: 8px;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul { list-style: none; }
svg { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 1.8; }

::selection { background: var(--accent-soft); color: var(--text); }

/* 美化滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 8px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); background-clip: content-box; }

/* ---------- 3. 布局容器 ---------- */
.page {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- 4. 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--border);
  transition: background 0.4s ease, border-color 0.4s ease;
}
.header-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 28px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: inline-flex; align-items: center; }
.brand-mark {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text);
}
.header-nav { display: flex; gap: 26px; }
.nav-link {
  font-size: 13.5px;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
  position: relative;
}
.nav-link:hover { color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 9px;            /* 小圆角：按钮 */
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  transition: all 0.25s ease;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); background: var(--bg-hover); }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* ---------- 5. Hero / 最新版主推区 ---------- */
.hero { padding: 72px 0 48px; }

.hero-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.channel-badge {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 4px;            /* 超小圆角：标签 */
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid transparent;
}
.channel-badge.channel-beta { background: var(--warning-soft); color: var(--warning); }
.channel-badge.channel-alpha { background: var(--accent-soft); color: var(--accent); }
.version-id {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.release-date {
  font-size: 13px;
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
}
.release-date::before { content: "·"; margin-right: 12px; color: var(--text-tertiary); }

.hero-title {
  font-size: clamp(32px, 5vw, 46px);
  font-weight: 680;
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 16px;
}
.hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.7;
  margin-bottom: 36px;
}

/* 统计块 */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 20px 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;          /* 大圆角：卡片 */
  box-shadow: var(--shadow-sm);
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.stat-block { display: flex; flex-direction: column; gap: 4px; }
.stat-label {
  font-size: 11.5px;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.stat-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.stat-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
}

/* ---------- 6. 下载面板 ---------- */
.download-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  padding: 28px;
  margin-bottom: 40px;
}
.download-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.panel-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}
.mirror-toggle {
  font-size: 12.5px;
  color: var(--accent);
  padding: 6px 12px;
  border-radius: 6px;
  transition: background 0.2s ease;
}
.mirror-toggle:hover { background: var(--accent-soft); }

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}
.download-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 10px;          /* 中圆角：下载按钮 */
  text-align: left;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
  position: relative;
  overflow: hidden;
}
.download-btn:hover {
  border-color: var(--accent);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.download-btn:active { transform: translateY(0); }
.download-btn.is-loading { pointer-events: none; opacity: 0.7; }
.download-btn.is-invalid {
  opacity: 0.45;
  pointer-events: none;
  background: var(--bg-subtle);
}
.download-btn .platform-icon {
  width: 34px; height: 34px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-secondary);
}
.download-btn .platform-info { flex: 1; min-width: 0; }
.download-btn .platform-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  display: block;
  line-height: 1.3;
}
.download-btn .platform-meta {
  font-size: 11.5px;
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
}
.download-btn .download-arrow {
  color: var(--text-tertiary);
  transition: transform 0.18s ease, color 0.18s ease;
  flex-shrink: 0;
}
.download-btn:hover .download-arrow { color: var(--accent); transform: translateX(2px); }

/* 加载波纹 */
.download-btn .ripple {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, var(--accent-soft), transparent);
  transform: translateX(-100%);
  pointer-events: none;
}
.download-btn.is-loading .ripple { animation: ripple 1.1s ease-in-out infinite; }
@keyframes ripple { to { transform: translateX(100%); } }

/* 镜像列表 */
.mirror-list {
  margin-top: 16px;
  padding-top: 18px;
  border-top: 1px dashed var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mirror-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--bg-subtle);
  font-size: 13px;
  color: var(--text-secondary);
  transition: background 0.2s ease, color 0.2s ease;
}
.mirror-item:hover { background: var(--bg-hover); color: var(--text); }
.mirror-item .mirror-name { font-weight: 500; }
.mirror-item .mirror-link { color: var(--accent); font-size: 12.5px; }

/* ---------- 7. 更新日志 ---------- */
.latest-changelog { margin-bottom: 24px; }
.changelog-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.expand-btn {
  font-size: 12.5px;
  color: var(--accent);
  padding: 6px 12px;
  border-radius: 6px;
  transition: background 0.2s ease;
}
.expand-btn:hover { background: var(--accent-soft); }

.changelog-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 200px;
  overflow: hidden;
  position: relative;
  transition: max-height 0.4s ease;
}
.changelog-list.expanded { max-height: 2000px; }
.changelog-list:not(.expanded)::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}
.changelog-item {
  display: flex;
  gap: 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  padding: 2px 0;
}
.changelog-tag {
  flex-shrink: 0;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 2px 7px;
  border-radius: 4px;
  height: fit-content;
  margin-top: 2px;
  text-transform: uppercase;
}
.changelog-tag.tag-new { background: var(--success-soft); color: var(--success); }
.changelog-tag.tag-fix { background: var(--danger-soft); color: var(--danger); }
.changelog-tag.tag-opt { background: var(--accent-soft); color: var(--accent); }
.changelog-tag.tag-other { background: var(--bg-subtle); color: var(--text-tertiary); border: 1px solid var(--border); }

/* ---------- 8. 工具栏：搜索 + 筛选 ---------- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0 28px;
  flex-wrap: wrap;
}
.toolbar-left { flex: 1; min-width: 220px; }
.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0 14px;
  height: 42px;
  max-width: 360px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.search-box:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search-icon { color: var(--text-tertiary); flex-shrink: 0; }
#searchInput {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 14px;
}
#searchInput::placeholder { color: var(--text-tertiary); }

.toolbar-right { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-chip {
  font-size: 13px;
  padding: 8px 14px;
  border-radius: 999px;         /* 胶囊圆角：筛选 chip */
  color: var(--text-secondary);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  transition: all 0.2s ease;
}
.filter-chip:hover { color: var(--text); border-color: var(--border-strong); }
.filter-chip.is-active {
  background: var(--text);
  color: var(--text-inverse);
  border-color: var(--text);
}

/* ---------- 9. 历史版本 ---------- */
.history { padding-bottom: 80px; }
.history-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.section-title {
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text);
}
.collapse-toggle {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.collapse-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.collapse-toggle .toggle-icon {
  width: 12px; height: 12px;
  transition: transform 0.3s ease;
}
.collapse-toggle.is-expanded .toggle-icon { transform: rotate(180deg); }

.history-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease, opacity 0.4s ease;
  opacity: 0;
}
.history-list.is-expanded { max-height: 9999px; opacity: 1; }

.version-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;          /* 中大圆角：版本卡片 */
  padding: 22px 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.version-card:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.version-card.is-hidden { display: none; }

.version-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.version-card .v-num {
  font-size: 16px;
  font-weight: 650;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.version-card .v-date {
  font-size: 12.5px;
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
}
.version-card .v-summary {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.6;
}
.version-card .v-meta {
  display: flex;
  gap: 18px;
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.version-card .v-meta span { display: inline-flex; align-items: center; gap: 5px; }
.version-card .v-meta .meta-label { color: var(--text-tertiary); }
.version-card .v-meta .meta-value { color: var(--text-secondary); }

.version-card .v-downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.mini-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  padding: 7px 12px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  transition: all 0.18s ease;
}
.mini-download:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-elevated);
}
.mini-download.is-invalid { opacity: 0.4; pointer-events: none; }

.version-card .v-changelog-toggle {
  font-size: 12.5px;
  color: var(--accent);
  margin-top: 14px;
  padding: 4px 0;
  transition: opacity 0.2s ease;
}
.version-card .v-changelog-toggle:hover { opacity: 0.7; }
.version-card .v-changelog {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, margin-top 0.35s ease;
}
.version-card .v-changelog.is-expanded { max-height: 800px; margin-top: 14px; }
.version-card .v-changelog li {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 4px 0 4px 16px;
  position: relative;
}
.version-card .v-changelog li::before {
  content: "";
  position: absolute;
  left: 2px; top: 12px;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--text-tertiary);
}

/* ---------- 10. 空状态 ---------- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-tertiary);
}
.empty-state svg {
  width: 48px; height: 48px;
  color: var(--text-tertiary);
  opacity: 0.4;
  margin-bottom: 16px;
}
.empty-title { font-size: 15px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }
.empty-hint { font-size: 13px; }

/* ---------- 11. 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 28px;
  text-align: center;
}
.footer-text { font-size: 13px; color: var(--text-secondary); margin-bottom: 4px; }
.footer-sub { font-size: 11.5px; color: var(--text-tertiary); }

/* ---------- 12. 回到顶部 ---------- */
.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  color: var(--text-secondary);
  z-index: 40;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, color 0.2s ease, border-color 0.2s ease;
}
.back-to-top.is-visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { color: var(--accent); border-color: var(--accent); }
.back-to-top svg { width: 18px; height: 18px; stroke-width: 2; }

/* ---------- 13. 响应式适配 ---------- */
@media (max-width: 768px) {
  .page { padding: 0 20px; }
  .header-inner { padding: 0 20px; height: 54px; }
  .header-nav { display: none; }                    /* 移动端折叠非核心导航 */
  .hero { padding: 48px 0 36px; }
  .hero-title { font-size: 30px; }
  .hero-desc { font-size: 15px; }
  .hero-top { gap: 20px; }
  .hero-stats { gap: 18px; padding: 16px 18px; }
  .stat-divider { display: none; }
  .download-panel { padding: 20px; }
  .download-grid { grid-template-columns: 1fr; gap: 10px; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .toolbar-left { width: 100%; }
  .search-box { max-width: 100%; }
  .toolbar-right { overflow-x: auto; padding-bottom: 4px; flex-wrap: nowrap; }
  .filter-chip { white-space: nowrap; flex-shrink: 0; }
  .version-card { padding: 18px; }
  .back-to-top { right: 18px; bottom: 18px; }
}

@media (max-width: 350px) {
  .hero-meta { gap: 8px; }
  .release-date::before { margin-right: 8px; }
  .hero-title { font-size: 26px; }
  .hero-figure { display: none; }   /* 极窄屏幕放弃放置图片 */
}

/* 减弱动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}