/* ============================================================
   knowisp 灵犀知识库 · 产品站样式
   设计语言：暖纸质感（色调对标 quukk.com 主站）
   色板：米白 #FAF7F2 / 陶土 #AA603F / 深陶土 #8B482E / 暖沙 #A18A76 / 墨棕 #302A25
   ============================================================ */
:root {
  --bg: #FAF7F2;
  --panel: #F0E9DF;
  --card: #FFFFFF;
  --line: #EAE1D3;
  --ink: #302A25;
  --muted: #75695F;
  --accent: #AA603F;
  --accent-deep: #8B482E;
  --sand: #A18A76;
  --clay: #8B482E;
  --accent-soft: rgba(170, 96, 63, .08);
  --radius: 14px;
   /* 系统字体栈：不依赖外部字体 CDN（内网可访问性优先）；本机装有 Manrope/Noto Sans SC 时自动采用品牌字体 */
   --font: "Manrope", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

h1, h2, h3 { font-weight: 700; letter-spacing: -.03em; line-height: 1.18; color: var(--ink); }
h1 { font-size: clamp(40px, 5.2vw, 68px); letter-spacing: -.035em; }
h2 { font-size: clamp(32px, 3.8vw, 48px); }
h3 { font-size: 21px; letter-spacing: -.01em; }

/* ---------- 通用 ---------- */
.kicker {
  font-size: 13px; font-weight: 700; letter-spacing: .14em;
  color: var(--accent); margin-bottom: 18px;
}
.section { padding: 110px 0; }
.section-lead { color: var(--muted); font-size: 17px; margin-top: 20px; max-width: 640px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 15px 30px; border-radius: 5px; border: 0;
  font-size: 16px; font-weight: 600; transition: transform .15s ease, background .15s ease, box-shadow .15s ease;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-deep); transform: translateY(-1px); box-shadow: 0 10px 24px rgba(170, 96, 63, .3); }
.btn-sm { padding: 10px 20px; font-size: 14px; border-radius: 4px; }
.btn-link {
  display: inline-flex; align-items: center; padding: 15px 6px;
  font-weight: 600; font-size: 16px; color: var(--ink); transition: color .15s;
}
.btn-link:hover { color: var(--accent); }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  background: rgba(250, 247, 242, .82);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent; transition: border-color .2s, box-shadow .2s;
}
.nav.scrolled { border-bottom-color: var(--line); box-shadow: 0 6px 24px rgba(48, 42, 37, .05); }
.nav-inner { display: flex; align-items: center; gap: 36px; height: 68px; }
.nav-logo-img { height: 30px; width: auto; }
.nav-menu { display: flex; gap: 30px; margin-left: 12px; }
.nav-menu a { font-size: 15px; font-weight: 500; color: var(--ink); opacity: .78; transition: opacity .15s, color .15s; }
.nav-menu a:hover { opacity: 1; color: var(--accent); }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.btn-nav { padding: 10px 22px; font-size: 14.5px; border-radius: 5px; }
.nav-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; position: relative; }
.nav-toggle span { position: absolute; left: 9px; right: 9px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .25s, opacity .2s; }
.nav-toggle span:first-child { top: 15px; }
.nav-toggle span:last-child { bottom: 15px; }
.nav-toggle.open span:first-child { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle.open span:last-child { transform: translateY(-4.5px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding: 150px 0 90px; }
.hero h1 .hl-line { color: var(--accent); }
.hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 64px; align-items: center; }
.tag {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 13px; font-weight: 700; letter-spacing: .1em; color: var(--accent);
  background: var(--accent-soft); border: 1px solid rgba(170, 96, 63, .2);
  padding: 7px 14px; border-radius: 999px; margin-bottom: 26px;
}
.tag-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--sand); }
.lead { font-size: 17.5px; color: var(--muted); margin-top: 26px; max-width: 520px; }
.hero-cta { display: flex; align-items: center; gap: 22px; margin-top: 36px; flex-wrap: wrap; }
.hero-note { margin-top: 26px; font-size: 14px; color: var(--muted); }

.hero-stage {
  background: var(--panel); border-radius: 26px;
  padding: 28px; display: flex; align-items: center; justify-content: center;
}

/* ---------- 演示问答卡 ---------- */
.demo-card {
  width: 100%; max-width: 560px; background: var(--card);
  border: 1px solid var(--line); border-radius: 18px;
  box-shadow: 0 24px 60px rgba(48, 42, 37, .1);
  display: flex; flex-direction: column; overflow: hidden;
}
.demo-head { display: flex; align-items: center; gap: 10px; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.demo-logo { width: 20px; height: 20px; }
.demo-title { font-weight: 700; font-size: 14.5px; }
.demo-badge {
  margin-left: auto; font-size: 11.5px; font-weight: 600; color: var(--clay);
  background: rgba(170, 96, 63, .1); padding: 3px 10px; border-radius: 999px;
}
.demo-body { padding: 18px; display: flex; flex-direction: column; gap: 14px; min-height: 220px; max-height: 330px; overflow-y: auto; }
.msg { max-width: 92%; }
.msg p { font-size: 14.5px; line-height: 1.75; }
.msg-user { align-self: flex-end; background: var(--accent); color: #fff; border-radius: 14px 14px 4px 14px; padding: 11px 15px; }
.msg-user .msg-time { display: block; font-size: 11px; opacity: .72; margin-top: 4px; }
.msg-ai { align-self: flex-start; background: var(--bg); border: 1px solid var(--line); border-radius: 4px 14px 14px 14px; padding: 13px 16px; }
.msg-static { max-width: 100%; }
.cite {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 16px; height: 16px; padding: 0 3px; margin: 0 2px;
  font-size: 10.5px; font-weight: 700; font-style: normal;
  color: var(--accent); background: var(--accent-soft); border-radius: 5px;
  vertical-align: 2px;
}
.demo-sources { margin-top: 10px; display: flex; flex-direction: column; gap: 5px; }
.src { font-size: 12px; color: var(--muted); display: inline-flex; align-items: center; gap: 4px; }
.demo-chips { display: flex; gap: 8px; padding: 0 18px 12px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  font-size: 12.5px; padding: 6px 13px; border-radius: 999px; transition: border-color .15s, color .15s, background .15s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.demo-input { display: flex; gap: 10px; padding: 12px 18px; border-top: 1px solid var(--line); }
.demo-input input {
  flex: 1; border: 1px solid var(--line); border-radius: 8px; background: var(--bg);
  padding: 10px 14px; font-size: 14px; font-family: inherit; color: var(--ink); outline: none; transition: border-color .15s;
}
.demo-input input:focus { border-color: var(--accent); background: #fff; }
.demo-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line); background: var(--bg);
}
.demo-stats > div { padding: 14px 10px; text-align: center; }
.demo-stats b { display: block; font-size: 20px; font-weight: 800; color: var(--accent); letter-spacing: -.02em; }
.demo-stats span { font-size: 12px; color: var(--muted); }

/* 演示动画：正在检索 */
.msg-thinking { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13.5px; }
.spinner {
  width: 14px; height: 14px; border-radius: 50%; flex: none;
  border: 2px solid rgba(170, 96, 63, .25); border-top-color: var(--accent);
  animation: spin .8s linear infinite; display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }
.typing-cursor::after { content: "▍"; color: var(--accent); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- 黑白摄影带 ---------- */
.band {
  position: relative; min-height: 420px; display: flex; align-items: flex-end;
  background-size: cover; background-position: center 62%;
  filter: grayscale(1);
}
.band-scrim {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(53, 42, 35, .34) 0%, rgba(53, 42, 35, .68) 100%);
}
.band-inner { position: relative; z-index: 1; padding-top: 90px; padding-bottom: 64px; width: 100%; }
.band h2 { color: #fff; }
.band-credit { color: rgba(255, 255, 255, .68); font-size: 12.5px; margin-top: 18px; }

/* ---------- 对比表 ---------- */
.cmp { margin-top: 54px; border-top: 1px solid var(--line); }
.cmp-row {
  display: grid; grid-template-columns: 1.05fr 1fr 1fr 1.25fr;
  border-bottom: 1px solid var(--line); align-items: stretch;
}
.cmp-row > div { padding: 20px 22px; font-size: 15px; color: var(--muted); display: flex; align-items: center; }
.cmp-head > div { font-size: 13.5px; font-weight: 700; color: var(--ink); padding: 16px 22px; }
.cmp-k { font-weight: 600; color: var(--ink) !important; }
.cmp-hl { background: var(--accent); color: #fff !important; font-weight: 600; }
.cmp-head .cmp-hl { border-radius: 12px 12px 0 0; }
.cmp-row:last-child .cmp-hl { border-radius: 0 0 12px 12px; }
.cmp-row:not(.cmp-head) .cmp-hl { border-top: 1px solid rgba(255, 255, 255, .16); }

/* ---------- 左右分栏 ---------- */
.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 72px; align-items: center; }
.split-lead { font-size: 16.5px; color: var(--muted); margin-top: 22px; }
.split-note { margin-top: 26px; font-size: 14px; color: var(--muted); }
.split-bigquote { margin-top: 34px; font-size: 20px; font-weight: 600; letter-spacing: -.01em; color: var(--ink); }
.dots { list-style: none; margin-top: 28px; display: flex; flex-direction: column; gap: 18px; }
.dots li { position: relative; padding-left: 22px; font-size: 15.5px; color: var(--muted); }
.dots li::before {
  content: ""; position: absolute; left: 0; top: .62em;
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
}
.dots li:nth-child(2)::before { background: var(--sand); }
.dots li:nth-child(3)::before { background: var(--clay); }
.dots b { color: var(--ink); }

/* ---------- 拟态卡片（检索 / 生成） ---------- */
.mock-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  box-shadow: 0 24px 60px rgba(48, 42, 37, .08); padding: 24px 26px;
  position: relative;
}
.mock-badge {
  position: absolute; top: 18px; right: 22px;
  font-size: 11.5px; font-weight: 600; color: var(--clay);
  background: rgba(170, 96, 63, .1); border-radius: 999px; padding: 3px 10px;
}
.mock-step {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  width: 17px; height: 17px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 10.5px; font-weight: 700; font-style: normal;
}
.mock-search .mock-step { margin-right: 2px; }
.mock-label { display: flex; align-items: center; gap: 7px; }
.mock-note { margin-left: auto; font-size: 11.5px; font-weight: 400; color: var(--muted); }
.mock-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.mock-tab { font-size: 13.5px; font-weight: 600; color: var(--muted); padding: 6px 14px; border-radius: 8px; }
.mock-tab.on { background: var(--panel); color: var(--ink); }
.mock-search {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--line); background: var(--bg); border-radius: 10px;
  padding: 12px 16px; font-size: 14.5px; font-weight: 600; color: var(--ink);
}
.mock-search svg { color: var(--muted); flex: none; }
.mock-search em { margin-left: auto; font-style: normal; font-size: 12px; font-weight: 500; color: var(--muted); }
.mock-label { font-size: 12.5px; color: var(--muted); margin: 18px 0 8px; }
.mock-hit {
  display: grid; grid-template-columns: 1fr auto; gap: 3px 14px; align-items: baseline;
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px;
}
.mock-hit b { font-size: 14.5px; }
.mock-hit span { font-size: 12.5px; color: var(--muted); }
.mock-hit em { grid-row: span 2; align-self: center; font-style: normal; font-size: 12.5px; color: var(--muted); }
.mock-quote q { grid-column: 1; font-size: 13px; color: var(--muted); }
.hit-why { grid-column: 1 / -1; font-size: 12px; color: var(--muted); }
.hit-why-hl { color: var(--accent); font-weight: 600; }
.mock-foot { margin-top: 18px; font-size: 12.5px; color: var(--muted); }
.mock-foot b { color: var(--ink); font-weight: 600; }

.mock-progress-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.mock-progress-head b { font-size: 16px; letter-spacing: -.01em; }
.badge-doing {
  font-size: 12px; font-weight: 700; color: var(--accent);
  background: var(--accent-soft); padding: 4px 12px; border-radius: 999px;
}
.step {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 18px; margin-bottom: 10px; font-size: 14.5px; font-weight: 600;
}
.step i {
  width: 20px; height: 20px; border-radius: 50%; flex: none;
  display: inline-flex; align-items: center; justify-content: center;
  font-style: normal; font-size: 12px; color: #fff; background: var(--accent);
}
.step em { margin-left: auto; font-style: normal; font-size: 12.5px; font-weight: 500; color: var(--muted); }
.step.doing i { background: transparent; border: 0; width: 16px; height: 16px; }
.pbar { height: 5px; border-radius: 99px; background: var(--panel); margin: 16px 2px 0; overflow: hidden; }
.pbar i { display: block; height: 100%; border-radius: 99px; background: var(--accent); }

/* ---------- 流程三态 ---------- */
.flow { margin-top: 54px; display: grid; grid-template-columns: 1fr 1fr 1.35fr; gap: 26px; align-items: start; }
.flow-tag { font-size: 13.5px; font-weight: 700; color: var(--muted); margin-bottom: 12px; }
.flow-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 20px; display: flex; flex-direction: column; gap: 10px; min-height: 118px;
}
.flow-scan { display: flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px 15px; }
.flow-actions { display: flex; gap: 8px; margin-top: 4px; }
.flow-actions span {
  font-size: 12px; font-weight: 600; color: var(--muted);
  border: 1px solid var(--line); background: var(--bg); border-radius: 7px; padding: 5px 11px;
}
.flow-note { margin-top: 40px; font-size: 15px; color: var(--muted); max-width: 560px; }

/* ---------- 三列能力 ---------- */
.cols3 { margin-top: 56px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; }
.col-tag { font-size: 13.5px; font-weight: 700; margin-bottom: 14px; }
.tag-blue { color: var(--accent); }
.tag-teal { color: var(--sand); }
.tag-violet { color: var(--clay); }
.col3 p:last-child { margin-top: 12px; font-size: 15px; color: var(--muted); }

/* ---------- 界面实拍 ---------- */
.shot-tabs { display: flex; gap: 10px; margin: 40px 0 26px; flex-wrap: wrap; }
.shot-tabs button {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  font-size: 14.5px; font-weight: 600; padding: 11px 22px; border-radius: 10px;
  transition: background .15s, color .15s, border-color .15s;
}
.shot-tabs button:hover { border-color: var(--accent); color: var(--accent); }
.shot-tabs button[aria-selected="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.shot-pane { display: none; }
.shot-pane.on { display: block; animation: fadeUp .4s ease both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } }
.win {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  overflow: hidden; box-shadow: 0 30px 80px rgba(48, 42, 37, .1);
}
.win-bar { display: flex; align-items: center; gap: 14px; padding: 11px 16px; border-bottom: 1px solid var(--line); background: var(--bg); }
.win-dots { display: flex; gap: 6px; }
.win-dots i { width: 10px; height: 10px; border-radius: 50%; background: #E7DFD2; }
.win-dots i:first-child { background: #FF5F57; }
.win-dots i:nth-child(2) { background: #FEBC2E; }
.win-dots i:last-child { background: #28C840; }
.win-tab { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; font-weight: 600; color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 7px; padding: 4px 11px; }
.win-tab img { width: 13px; height: 13px; }
.win-url { margin-left: auto; font-size: 12px; color: var(--muted); }
.shot-img { width: 100%; height: auto; }
.shot-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 14px; }
.shot-meta p { font-size: 13.5px; color: var(--muted); }
.shot-zoom { border: 1px solid var(--line); background: var(--card); color: var(--ink); font-size: 13px; font-weight: 600; padding: 8px 16px; border-radius: 8px; transition: border-color .15s, color .15s; }
.shot-zoom:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- FAQ ---------- */
.faq { margin-top: 48px; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none; display: flex; align-items: center; justify-content: space-between;
  padding: 24px 4px; font-size: 17.5px; font-weight: 600; letter-spacing: -.01em; cursor: pointer;
  transition: color .15s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--accent); }
.faq-item summary i {
  position: relative; width: 16px; height: 16px; flex: none; margin-left: 20px;
}
.faq-item summary i::before, .faq-item summary i::after {
  content: ""; position: absolute; inset: 0; margin: auto; background: var(--muted); transition: transform .25s;
}
.faq-item summary i::before { width: 14px; height: 2px; }
.faq-item summary i::after { width: 2px; height: 14px; }
.faq-item[open] summary i::after { transform: rotate(90deg); }
.faq-a p { padding: 0 4px 26px; font-size: 15.5px; color: var(--muted); max-width: 760px; }

/* ---------- CTA ---------- */
.cta { padding: 130px 0; }
.cta-inner { text-align: center; }
.cta-inner .section-lead { margin-left: auto; margin-right: auto; }
.cta-center { justify-content: center; }

/* ---------- Footer ---------- */
.footer { background: var(--panel); border-top: 1px solid var(--line); }
.foot-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px;
  padding-top: 64px; padding-bottom: 44px;
}
.foot-logo { height: 30px; width: auto; margin-bottom: 16px; }
.foot-brand p { font-size: 14px; color: var(--muted); }
.foot-links p { font-size: 13px; font-weight: 700; margin-bottom: 14px; }
.foot-links a { display: block; font-size: 14px; color: var(--muted); padding: 4px 0; transition: color .15s; }
.foot-links a:hover { color: var(--accent); }
.foot-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding-top: 22px; padding-bottom: 26px; border-top: 1px solid var(--line);
  font-size: 12.5px; color: var(--muted);
}

/* ---------- 大图查看器 ---------- */
.viewer {
  position: fixed; inset: 0; z-index: 90;
  background: rgba(30, 25, 21, .72);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center; padding: 32px;
  animation: fadeIn .2s ease both;
}
@keyframes fadeIn { from { opacity: 0; } }
.viewer[hidden] { display: none; }
.viewer-panel {
  background: var(--card); border-radius: 18px; overflow: hidden;
  width: min(1200px, 100%); max-height: 100%;
  display: flex; flex-direction: column; box-shadow: 0 40px 120px rgba(0, 0, 0, .35);
}
.viewer-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 22px; border-bottom: 1px solid var(--line); }
.viewer-head p { font-weight: 700; font-size: 15px; }
.viewer-close { border: 0; background: var(--bg); width: 34px; height: 34px; border-radius: 8px; font-size: 15px; color: var(--muted); transition: background .15s, color .15s; }
.viewer-close:hover { background: var(--panel); color: var(--ink); }
.viewer-body { overflow: auto; }
.viewer-body img { width: 100%; height: auto; }
.viewer-foot { padding: 13px 22px; font-size: 12.5px; color: var(--muted); border-top: 1px solid var(--line); }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .hero-grid, .split { grid-template-columns: 1fr; gap: 44px; }
  .hero { padding-top: 128px; }
  .cols3 { grid-template-columns: 1fr; gap: 34px; }
  .flow { grid-template-columns: 1fr; }
  .flow-card { min-height: 0; }
  .cmp-row { grid-template-columns: 1fr 1fr; }
  .cmp-row > div { padding: 16px; }
  .cmp-head { display: none; }
  .cmp-row > .cmp-k { grid-column: 1 / -1; padding-bottom: 4px; background: var(--panel); }
  .cmp-hl { border-radius: 0 !important; }
  .cmp-row > .cmp-hl { grid-column: 1 / -1; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
  .section { padding: 76px 0; }
  .nav-menu {
    position: fixed; top: 68px; left: 0; right: 0;
    background: rgba(250, 247, 242, .96); border-bottom: 1px solid var(--line);
    flex-direction: column; gap: 0; padding: 8px 20px 16px; margin: 0;
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 13px 4px; font-size: 16px; border-top: 1px solid var(--line); }
  .nav-toggle { display: block; }
  .btn-nav { padding: 9px 16px; }
  .hero-stage { padding: 16px; border-radius: 20px; }
  .demo-body { max-height: 260px; }
  .band { min-height: 320px; }
  .cmp-row { grid-template-columns: 1fr; }
  .cmp-row > .cmp-k { padding-bottom: 8px; }
  .cta { padding: 90px 0; }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
  .viewer { padding: 14px; }
}