/* ============================================================
   CpqSystemTool 官网 · 视觉焕新（功能 / 内容不变，仅美化 + 动画优化）
   设计令牌：品牌青绿 #089182；圆角卡片；玻璃拟态导航；交错入场；深浅双主题滑块
   ============================================================ */
:root {
  --accent: #089182;
  --accent-700: #0a6b5e;
  --accent-600: #0c7d6e;
  --accent-300: #5fd6c2;
  --accent-light: #16e0bd;
  --accent-dark: #0a3d38;
  --accent-soft: #e6faf6;
  --ink: #10201f;
  --text: #16242b;
  --text-soft: #566871;
  --bg: #f4f8f7;
  --bg-2: #e9f2f0;
  --panel: #ffffff;
  --border: #e2ebf0;
  --border-strong: #cfe0dc;
  --shadow-sm: 0 2px 8px rgba(20,60,70,.06);
  --shadow: 0 8px 24px rgba(20,60,70,.10);
  --shadow-lg: 0 18px 44px rgba(20,60,70,.16);
  --radius: 16px;
  --radius-sm: 11px;
  --maxw: 1200px;
  --ease: cubic-bezier(.16,1,.3,1);
  --nav-h: 64px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.25; color: var(--ink); }
.mono { font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---------- 导航：玻璃拟态 ---------- */
nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.78);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(20,60,70,.03);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); width: 100%; padding: 0 22px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 16px; color: var(--text); }
.brand .logo {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  display: grid; place-items: center; overflow: hidden;
  box-shadow: 0 4px 12px rgba(8,145,130,.32);
}
.brand .logo img { width: 22px; height: 22px; object-fit: contain; display: block; }
.nav-links { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.nav-links a { color: var(--text-soft); font-size: 14.5px; font-weight: 600; transition: color .2s var(--ease); }
.nav-links a:hover { color: var(--accent); text-decoration: none; }
.nav-links a.active { color: var(--accent); }
.nav-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-600));
  color: #fff !important; padding: 8px 16px; border-radius: 999px; font-weight: 700;
  box-shadow: 0 6px 16px rgba(8,145,130,.30); transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.nav-cta:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 10px 22px rgba(8,145,130,.38); }
.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer;
  font-size: 22px; color: var(--text); line-height: 1; padding: 4px 8px; border-radius: 8px;
}
.nav-toggle:hover { background: var(--accent-soft); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1100px 520px at 78% -8%, rgba(22,224,189,.20), transparent 60%),
    radial-gradient(900px 460px at 8% 18%, rgba(8,145,130,.16), transparent 62%),
    linear-gradient(180deg, #f3fbf9 0%, var(--bg) 78%);
  padding: 72px 0 64px;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(460px 380px at 88% 6%, rgba(22,224,189,.18), transparent 70%),
    radial-gradient(520px 440px at 10% 24%, rgba(8,145,130,.12), transparent 72%),
    radial-gradient(640px 520px at 62% 104%, rgba(95,214,194,.10), transparent 76%);
}  /* ponytail: replaced literal dot-grid (AI tell) with soft aurora blooms */
.hero .container { position: relative; }
.badge {
  display: inline-block; font-size: 13px; font-weight: 700; color: var(--accent-700);
  background: rgba(255,255,255,.7); border: 1px solid var(--border-strong);
  padding: 6px 14px; border-radius: 999px; box-shadow: var(--shadow-sm);
}
.hero h1 {
  font-size: clamp(30px, 5vw, 50px); font-weight: 900; letter-spacing: -.5px; margin: 18px 0 10px;
  background: linear-gradient(120deg, var(--ink) 30%, var(--accent-700));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.tagline { font-size: clamp(17px, 2.4vw, 22px); font-weight: 700; color: var(--ink); }
.sub { font-size: 15.5px; color: var(--text-soft); margin-top: 8px; }
.hero-note { font-size: 13.5px; color: var(--text-soft); margin-top: 14px; }
.cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.trust {
  display: flex; flex-wrap: wrap; gap: 14px 30px; margin-top: 34px;
  font-size: 14px; color: var(--text-soft);
}
.trust div { display: flex; align-items: center; gap: 8px; }
.trust b { color: var(--accent-700); font-size: 18px; font-weight: 900; }

/* ---------- 按钮系统 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font-size: 15px; font-weight: 700; padding: 12px 22px; border-radius: 12px;
  border: 1px solid transparent; transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
  text-decoration: none !important;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-600)); color: #fff; box-shadow: 0 10px 24px rgba(8,145,130,.34); }
.btn-primary:hover { box-shadow: 0 14px 30px rgba(8,145,130,.44); }
.btn-ghost { background: #fff; color: var(--accent-700); border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.btn-ghost:hover { border-color: var(--accent); }
.btn-outline { background: transparent; color: var(--accent-700); border-color: var(--accent); }
.btn-outline:hover { background: var(--accent-soft); }
.btn-accent { background: linear-gradient(135deg, var(--accent-700), var(--accent)); color: #fff; box-shadow: 0 10px 24px rgba(8,145,130,.30); }

/* ---------- 区块标题 ---------- */
.section-head { text-align: center; max-width: 720px; margin: 0 auto 34px; }
.eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); background: var(--accent-soft); padding: 4px 12px; border-radius: 999px; margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(24px, 3.4vw, 34px); font-weight: 900; }
.section-head p { color: var(--text-soft); margin-top: 10px; font-size: 15.5px; }

/* ---------- 为什么选择 ---------- */
#why { padding: 72px 0 8px; }
.why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; }
.why {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
  text-align: center;
  text-align: center;
  text-align: center;
  text-align: center;
  text-align: center;
  box-shadow: var(--shadow-sm); transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.why:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--accent-300); }  /* ponytail: lift + accent edge */
.why .ico {
  width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center; font-size: 26px;
  background: linear-gradient(135deg, var(--accent-soft), #fff); border: 1px solid var(--border); margin: 0 auto 14px;
}
.why h3 { font-size: 16.5px; font-weight: 800; margin-bottom: 6px; }
.why p { font-size: 14px; color: var(--text-soft); }

/* ---------- 功能卡片网格 ---------- */
#features { padding: 64px 0 64px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.card {
  display: flex; flex-direction: column; align-items: center; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); color: inherit; text-decoration: none !important;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
  text-align: center;
  position: relative; /* ponytail: needed for .card-index absolute positioning */
  transform: none; /* override .reveal transform to ensure .card-index positions correctly */
  /* overflow: hidden removed — it clips the large watermark at top:8px/left:8px */
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--accent-300); }
.card .icon {
  width: 48px; height: 48px; border-radius: 12px; display: inline-grid; place-items: center; font-size: 25px; vertical-align: middle;
  background: linear-gradient(135deg, var(--accent), var(--accent-600)); color: #fff; margin: 0 0 12px;
  box-shadow: 0 6px 16px rgba(8,145,130,.26);
}
.card h3 { font-size: 16px; font-weight: 800; margin-bottom: 0; display: inline-block; vertical-align: middle; }
.card p { font-size: 13.5px; color: var(--text-soft); margin-bottom: 14px; }
.tags { display: flex; flex-wrap: nowrap; gap: 8px; justify-content: center; margin: auto 0 0 0; }  /* design-taste: tags sit below body, aligned to card bottom */
.tag {
  font-size: 12px; font-weight: 700; color: var(--accent-700);
  background: var(--accent-soft); border: 1px solid var(--border-strong);
  padding: 3px 10px; border-radius: 999px;
}
.card-index {
  position: absolute;
  top: -48px;
  left: 24px;
  font-size: 84px;
  font-weight: 800;
  color: rgba(8,145,130,0.15);
  pointer-events: none;
  user-select: none;
  z-index: 0;
  transform: none;
}
.card-index .d1 { display: inline-block; }
.card-index .d2 { display: inline-block; margin-top: 36px; }
.card .card-head .icon { margin: 0; }
.card .card-head h3 { display: block; margin: 0; }

/* ---------- 次级页头 ---------- */
.subhero { background: linear-gradient(180deg, #f1faf8, var(--bg)); padding: 52px 0 40px; border-bottom: 1px solid var(--border); }
.subhero h1 { font-size: clamp(26px, 3.6vw, 38px); font-weight: 900; }
.subhero p { color: var(--text-soft); margin-top: 10px; max-width: 760px; }
.crumbs { font-size: 13px; color: var(--text-soft); margin-bottom: 10px; }
.crumbs a { color: var(--accent); }

/* ---------- 深浅主题对比滑块 ---------- */
.preview-wrap { display: grid; grid-template-columns: 1.35fr 1fr; gap: 30px; align-items: start; }
.cmp {
  position: relative; width: 100%; aspect-ratio: 960 / 560; border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-lg); border: 1px solid var(--border-strong);
  user-select: none; touch-action: none; cursor: ew-resize; background: #0b1418;
}
.cmp__layer { position: absolute; inset: 0; }
.cmp__layer svg { width: 100%; height: 100%; display: block; }
.cmp__dark { clip-path: inset(0 50% 0 0); }
.cmp__handle {
  position: absolute; top: 0; bottom: 0; left: 50%; width: 3px; transform: translateX(-50%);
  background: #fff; box-shadow: 0 0 0 1px rgba(0,0,0,.15); z-index: 4;
}
.cmp__grip {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 38px; height: 38px; border-radius: 50%; background: #fff; box-shadow: 0 4px 14px rgba(0,0,0,.3);
  background-image: linear-gradient(90deg, transparent 44%, #cbd5e1 44%, #cbd5e1 56%, transparent 56%);
}
.cmp__badge {
  position: absolute; top: 12px; z-index: 5; font-size: 12px; font-weight: 800; padding: 4px 10px; border-radius: 999px; color: #fff;
}
.cmp__badge--dark { right: 12px; background: rgba(11,20,24,.7); }
.cmp__badge--light { left: 12px; background: rgba(255,255,255,.8); color: var(--ink); }
.cmp__hint {
  position: absolute; left: 0; right: 0; bottom: 10px; text-align: center; z-index: 5;
  font-size: 12px; color: rgba(255,255,255,.82); text-shadow: 0 1px 3px rgba(0,0,0,.5);
}
.preview-copy h3 { font-size: 20px; font-weight: 800; margin-bottom: 14px; }
.preview-copy ul { list-style: none; display: grid; gap: 10px; }
.preview-copy li { position: relative; padding-left: 26px; font-size: 14.5px; color: var(--text-soft); }
.preview-copy li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  width: 18px; height: 18px; border-radius: 50%; background: var(--accent-soft); color: var(--accent-700);
  font-size: 12px; font-weight: 900; display: grid; place-items: center;
}

/* ---------- CTA 横幅 ---------- */
.cta-section { padding: 56px 0; }
.cta-band {
  background: linear-gradient(120deg, var(--accent-700), var(--accent) 55%, var(--accent-light));
  border-radius: 22px; padding: 42px 32px; text-align: center; color: #fff;
  box-shadow: 0 22px 50px rgba(8,145,130,.30); position: relative; overflow: hidden;
}
.cta-band::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(420px 200px at 85% 10%, rgba(255,255,255,.22), transparent 70%);
}
.cta-band h2 { color: #fff; font-size: clamp(22px, 3vw, 30px); font-weight: 900; position: relative; }
.cta-band p { color: rgba(255,255,255,.92); margin: 10px 0 22px; position: relative; }
.cta-band .btn-accent { background: #fff; color: var(--accent-700); position: relative; box-shadow: 0 12px 26px rgba(0,0,0,.18); }

/* ---------- 页脚（深色） ---------- */
footer { background: linear-gradient(180deg, #0e2a27, #0a1f1d); color: rgba(255,255,255,.82); padding: 40px 0 30px; margin-top: 24px; }
footer .links { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; margin-bottom: 14px; }
footer .links a { color: rgba(255,255,255,.82); font-size: 14px; font-weight: 600; }
footer .links a:hover { color: var(--accent-light); text-decoration: none; }
footer .copy { text-align: center; font-size: 13px; color: rgba(255,255,255,.55); }

/* ============================================================
   下载页：深色玻璃双栏
   ============================================================ */
.dl-subnav {
  position: sticky; top: var(--nav-h); z-index: 40;
  background: rgba(255,255,255,.9); backdrop-filter: saturate(180%) blur(10px); -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.dl-subnav .container { display: flex; gap: 10px; flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px; }
.dl-subnav a { color: var(--text-soft); font-size: 14px; font-weight: 700; padding: 6px 14px; border-radius: 999px; background: var(--bg); border: 1px solid var(--border); transition: background .2s, color .2s; }
.dl-subnav a:hover { color: var(--accent-dark); background: var(--accent-soft); text-decoration: none; }
.download { --dl-card-h: 400px; --dl-card-max-offset: 160px; --dl-tabs-h: 74px; --dl-scrollbar-w: 6px; padding: 30px 0 50px; }
.download .container { max-width: 95vw; }
.dl-layout { width: 100%; }
.dl-layout-row { display: grid; grid-template-columns: minmax(380px, 0.65fr) minmax(0, 1.85fr); gap: 24px; align-items: stretch; }
.dl-main {
  background: linear-gradient(160deg, var(--accent-soft), #d8efea);  /* design-taste: light panel, not dark glass */
  border: 1px solid var(--border-strong); border-radius: 20px; padding: 26px;
  box-shadow: var(--shadow-lg); transition: transform .25s var(--ease), box-shadow .25s var(--ease);
  display: flex; flex-direction: column;
}
.dl-main:hover { transform: translateY(-4px); box-shadow: 0 22px 52px rgba(8,50,45,.30); }
.dl-main, .dl-changelog { height: var(--dl-card-h); max-height: calc(100vh - var(--dl-card-max-offset)); overflow: hidden; }
.dl-main .dl-tabs { margin-bottom: 16px; max-height: var(--dl-tabs-h); overflow-y: auto; padding: 0 4px 2px 0; display: flex; flex-wrap: wrap; gap: 6px; }
.dl-tabs, .chlog-panels { color-scheme: light; scrollbar-width: thin !important; scrollbar-color: rgba(8,145,130,.55) transparent !important; }
.dl-tabs::-webkit-scrollbar, .chlog-panels::-webkit-scrollbar { width: var(--dl-scrollbar-w); background: transparent; }
.dl-tabs::-webkit-scrollbar-thumb, .chlog-panels::-webkit-scrollbar-thumb { background: rgba(8,145,130,.55); border-radius: 999px; }
.dl-tabs::-webkit-scrollbar-thumb:hover, .chlog-panels::-webkit-scrollbar-thumb:hover { background: rgba(8,145,130,.85); }
.dl-tab {
  font-size: 13px; font-weight: 700; color: var(--text-soft);
  background: #fff; border: 1px solid var(--border-strong);
  padding: 6px 10px; border-radius: 999px; cursor: pointer; transition: all .2s var(--ease);
}
.dl-tab:hover { background: var(--accent-soft); color: var(--accent-700); }
.dl-tab.active { background: linear-gradient(135deg, var(--accent-light), var(--accent)); color: #06231f; border-color: transparent; box-shadow: 0 4px 12px rgba(22,224,189,.35); }
.dl-tab:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 2px; }
.dl-panels { position: relative; flex: 1; min-height: 0; overflow-y: auto; scrollbar-width: none; }
.dl-panels::-webkit-scrollbar { display: none; }
.dl-panel { display: none; }
.dl-panel.active { display: block; animation: fadeIn .25s ease; }
.dl-main .dl-ver { font-size: 17px; font-weight: 800; margin-bottom: 10px; color: var(--ink); }
.dl-main .dl-ver span { font-size: 13px; opacity: .75; font-weight: 500; }
.dl-main .meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-bottom: 16px; }  /* design-taste: 2x2 chips */
.dl-main .meta span { font-size: 13px; color: var(--accent-700); background: #fff; border: 1px solid var(--border-strong); padding: 4px 10px; border-radius: 999px; text-align: center; }
.dl-main .btn { margin: 0 auto 14px; font-size: 13px; padding: 10px 18px; white-space: nowrap; text-align: center; display: block; }
.dl-main .hash { font-size: 12px; color: var(--text-soft); word-break: break-all; font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; }
.dl-changelog {
  text-align: left; background: linear-gradient(160deg, var(--accent-soft), #d8efea);  /* design-taste: light panel */
  border: 1px solid var(--border-strong); border-radius: 20px; padding: 14px 26px 18px;
  box-shadow: var(--shadow-lg); transition: transform .25s var(--ease), box-shadow .25s var(--ease);
  display: flex; flex-direction: column;
}
.dl-changelog:hover { transform: translateY(-4px); box-shadow: 0 22px 52px rgba(8,50,45,.30); }
.dl-chlog-title-page { font-size: 16px; font-weight: 800; color: var(--ink); margin-bottom: 6px; padding: 6px 0 14px; border-bottom: 1px solid var(--border-strong); text-align: center; }
.chlog-panels { position: relative; flex: 1; min-height: 0; overflow-y: auto; padding: 0 6px 1em 0; }
.chlog-panel { display: none; }
.chlog-panel.active { display: block; animation: fadeIn .25s ease; }
.dl-changelog .chg-body, .dl-changelog .chg-body p, .dl-changelog .chg-body h4,
.dl-changelog .chg-body li, .dl-changelog .chg-body strong, .dl-changelog .chg-body blockquote, .dl-changelog .chg-body code { color: var(--text); }
.dl-changelog .chg-body code { background: var(--accent-soft); }
.dl-changelog .chg-body blockquote { background: var(--bg-2); border-left-color: var(--accent); }
.dl-changelog .chg-body li::marker { color: var(--accent-700); }
.dl-note { text-align: center; color: var(--text-soft); margin-top: auto; padding-top: 18px; font-size: 13.5px; }
.dl-layout .alt { margin-top: 6px; font-size: 13.5px; opacity: .9; text-align: center; }

/* ============================================================
   更新日志时间线（浅色卡片）
   ============================================================ */
.timeline { position: relative; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--accent-300), var(--border-strong)); }
.tl-item { position: relative; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; margin-bottom: 22px; box-shadow: var(--shadow-sm); transition: transform .25s var(--ease), box-shadow .25s var(--ease); }
.tl-item:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.tl-item::before { content: ""; position: absolute; left: -26px; top: 26px; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.tl-item .ver { display: inline-block; font-size: 14px; font-weight: 800; color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-600)); padding: 4px 12px; border-radius: 999px; margin-right: 10px; }
.tl-item .date { font-size: 13px; color: var(--text-soft); font-weight: 600; }
.tl-item .chg-body { color: var(--text-soft); margin-top: 12px; }
.tl-item .chg-body h4 { color: var(--text); }
.tl-item .chg-body strong { color: var(--accent-dark); }
.tl-item .chg-body li::marker { color: var(--accent); }
.tl-item .chg-body blockquote { background: var(--accent-soft); color: var(--text-soft); }
.tl-item .chg-body code { background: rgba(8,145,130,.10); color: #0a6b5e; }

/* 富文本（与 CHANGELOG.md 一致） */
.chg-body { font-size: 14px; line-height: 1.72; }
.chg-body p { margin: 6px 0; }
.chg-body h4 { font-size: 15px; font-weight: 800; margin: 14px 0 7px; }
.chg-body ul { margin: 6px 0 10px; padding-left: 20px; }
.chg-body li { margin-bottom: 7px; list-style: disc; }
.chg-body strong { font-weight: 800; }
.chg-body code { font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; font-size: 12.5px; padding: 1px 5px; border-radius: 5px; background: rgba(8,145,130,.10); color: #0a6b5e; word-break: break-all; }
.chg-body blockquote { margin: 10px 0; padding: 8px 14px; border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; font-size: 13px; line-height: 1.6; }

/* ============================================================
   更新日志筛选器与滚动容器
   ============================================================ */
.chlog-filter {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  padding: 16px 0 12px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.chlog-filter-inner {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.chlog-filter input[type="text"] {
  flex: 1;
  min-width: 160px;
  padding: 8px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color .2s;
}
.chlog-filter input[type="text"]:focus {
  border-color: var(--accent);
}
.chlog-filter select {
  padding: 8px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  outline: none;
  cursor: pointer;
  min-width: 120px;
}
.chlog-filter .filter-count {
  font-size: 13px;
  color: var(--text-soft);
  white-space: nowrap;
}
.timeline-scroll {
  max-height: 60vh;
  overflow-y: auto;
  scroll-behavior: smooth;
  position: relative;
}
.timeline-scroll::-webkit-scrollbar { width: 6px; }
.timeline-scroll::-webkit-scrollbar-track { background: transparent; }
.timeline-scroll::-webkit-scrollbar-thumb { background: rgba(8,145,130,.3); border-radius: 999px; }
.timeline-scroll::-webkit-scrollbar-thumb:hover { background: rgba(8,145,130,.6); }
.tl-item.hidden { display: none; }
.tl-item.highlighted {
  box-shadow: 0 0 0 2px var(--accent), 0 8px 24px rgba(8,145,130,.2);
  transform: translateY(-2px);
  animation: chlogHighlight .6s ease;
}
@keyframes chlogHighlight {
  0% { box-shadow: 0 0 0 0 rgba(8,145,130,.4); }
  50% { box-shadow: 0 0 0 4px rgba(8,145,130,.3); }
  100% { box-shadow: 0 0 0 2px var(--accent), 0 8px 24px rgba(8,145,130,.2); }
}

/* ============================================================
   关于页
   ============================================================ */
.about-section { padding: 52px 0; }
.section-title { font-size: 26px; font-weight: 800; margin-bottom: 22px; color: var(--text); }
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.about-grid.single { grid-template-columns: 1fr; }
.about-grid:not(.single):not([style]) { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.info-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; display: flex; gap: 16px; align-items: center; box-shadow: var(--shadow-sm); transition: transform .2s var(--ease), box-shadow .2s var(--ease); }
.info-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.info-card .icon { font-size: 28px; line-height: 1; flex-shrink: 0; width: 52px; height: 52px; border-radius: 13px; display: grid; place-items: center; background: var(--accent-soft); border: 1px solid var(--border); }
.info-body h3 { font-size: 14px; font-weight: 700; color: var(--text-soft); margin-bottom: 4px; }
.info-body p { font-size: 15px; font-weight: 600; color: var(--text); line-height: 1.5; }
.profile-card { background: linear-gradient(135deg, var(--panel) 60%, var(--accent-soft)); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; display: flex; gap: 24px; align-items: center; box-shadow: var(--shadow); transition: transform .2s var(--ease), box-shadow .2s var(--ease); }
.profile-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.profile-avatar { width: 84px; height: 84px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--accent-light)); color: #fff; display: grid; place-items: center; font-size: 34px; font-weight: 800; flex-shrink: 0; box-shadow: 0 8px 20px rgba(8,145,130,.25); }
.profile-body { display: flex; flex-direction: column; align-items: center; text-align: center; }
.profile-body h3 { font-size: 22px; font-weight: 800; margin-bottom: 4px; }
.profile-role { color: var(--text-soft); font-size: 15px; margin-bottom: 14px; }

/* 版本说明强调框 */
.version-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(8,145,130,.08), rgba(8,145,130,.15));
  border: 1px solid var(--accent);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--text);
  margin-top: 8px;
}
.version-note .icon {
  font-size: 16px;
}

.profile-links { display: flex; gap: 12px; flex-wrap: wrap; justify-content: space-between; width: 100%; }
.contact-item { flex: 1 1 0; min-width: 0; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; display: flex; flex-direction: column; gap: 10px; box-shadow: var(--shadow-sm); transition: transform .2s var(--ease), box-shadow .2s var(--ease); }
.contact-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.contact-btn { align-self: center; display: inline-flex; align-items: center; gap: 6px; background: var(--accent-soft); color: var(--accent-dark); padding: 7px 13px; border-radius: 999px; font-size: 14px; font-weight: 700; text-decoration: none !important; transition: background .2s; }
.contact-btn:hover { background: #c8f5ee; }
.contact-addr { font-size: 13.5px; color: var(--text); word-break: break-all; line-height: 1.5; font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; user-select: text; }
.disclaimer { background: rgba(255,193,7,.10); border: 1px solid rgba(255,193,7,.45); border-radius: var(--radius); padding: 24px 28px; }
.disclaimer h3 { color: #856404; margin-bottom: 12px; font-size: 18px; }
.disclaimer p { color: #6c5a12; margin-bottom: 10px; line-height: 1.65; }
.disclaimer p:last-child { margin-bottom: 0; }

/* 兼容可能的 FAQ / steps / req 结构 */
.faq { display: grid; gap: 14px; }
.steps { display: grid; gap: 16px; counter-reset: step; }
.step { display: flex; gap: 16px; align-items: flex-start; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow-sm); }
.step .num, .num { flex-shrink: 0; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-600)); }
.req-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }  /* design-taste: 2x2 calmer than 4-wide */
.req { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; box-shadow: var(--shadow-sm); text-align: center; }
.req .ico { display: inline-block; font-size: 26px; vertical-align: middle; margin: 0 8px 6px 0; }
.req h3 { display: inline-block; vertical-align: middle; margin-bottom: 0; }

/* ============================================================
   入场动画（交错 + 降级）
   ============================================================ */
.reveal { opacity: 1; transform: none; }                 /* 无 JS 时可见（安全降级） */
html.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: var(--rd, 0ms); }
html.js .reveal.in { opacity: 1; transform: none; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
  .preview-wrap { grid-template-columns: 1fr; }
  .download .container { max-width: var(--maxw); }
  .dl-layout-row { grid-template-columns: 1fr; gap: 18px; }
  .dl-main, .dl-changelog { height: auto; max-height: var(--dl-card-h); }
  .profile-card { flex-direction: column; text-align: center; gap: 18px; align-items: center; }
  
/* 版本说明强调框 */
  .req-grid { grid-template-columns: 1fr; }
  .tags { flex-wrap: wrap; }
}
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: var(--nav-h); right: 14px; left: 14px;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 10px;
    box-shadow: var(--shadow-lg);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 12px; border-radius: 9px; }
  .nav-links a:hover { background: var(--accent-soft); }
  .nav-cta { text-align: center; }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .hero { padding: 54px 0 48px; }
  .trust { gap: 10px 18px; }
}

/* 尊重「减少动态效果」系统偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  html.js .reveal { opacity: 1 !important; transform: none !important; }
}

/* contact区域水平居中 */
.contact-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
}