/* ============================================================
   Divinecord 官网设计系统
   深色主题 · blurple 品牌色 · 卡片化 · 滚动动效
   ============================================================ */

:root {
  --bg: #0b0c10;
  --bg-soft: #101118;
  --card: #15161d;
  --card-hover: #1a1b23;
  --border: #24252e;
  --border-strong: #31323d;
  --text: #e9eaee;
  --text-dim: #9ba1ac;
  --text-faint: #6b7078;
  --brand: #5865f2;
  --brand-2: #8b5cf6;
  --brand-soft: rgba(88, 101, 242, 0.14);
  --green: #3ba55d;
  --gradient: linear-gradient(135deg, #5865f2 0%, #8b5cf6 100%);
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  --shadow-brand: 0 8px 32px rgba(88, 101, 242, 0.28);
  --nav-h: 64px;
  --maxw: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

::selection { background: rgba(88, 101, 242, 0.4); }

/* ---------- 布局容器 ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.section { padding: 96px 0; }
.section-alt { background: var(--bg-soft); }

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(11, 12, 16, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.2px;
}
.brand-logo {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-brand);
  flex: none;
}
.brand-logo svg { width: 20px; height: 20px; }
.nav-links { display: flex; gap: 6px; margin-left: auto; align-items: center; }
.nav-links a {
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.nav-links a.active { color: var(--text); }
.nav-cta { margin-left: 10px; }

/* 汉堡按钮（移动端） */
.nav-burger {
  display: none;
  margin-left: auto;
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 10px;
  cursor: pointer;
  color: var(--text);
  place-items: center;
}
.nav-burger svg { width: 20px; height: 20px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(88, 101, 242, 0.42); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { border-color: var(--brand); color: #fff; background: var(--brand-soft); }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 9px; }
.btn-lg { padding: 14px 30px; font-size: 16px; border-radius: 12px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 88px) 0 110px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.5;
  animation: glowDrift 14s ease-in-out infinite alternate;
}
.hero-glow.g1 { width: 560px; height: 560px; background: rgba(88, 101, 242, 0.20); top: -180px; left: -120px; }
.hero-glow.g2 { width: 460px; height: 460px; background: rgba(139, 92, 246, 0.14); bottom: -220px; right: -80px; animation-delay: -7s; }
@keyframes glowDrift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(40px, 30px, 0) scale(1.12); }
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 999px;
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 22px;
}
.hero-badge .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(59, 165, 93, 0.5);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(59, 165, 93, 0.45); }
  70% { box-shadow: 0 0 0 9px rgba(59, 165, 93, 0); }
  100% { box-shadow: 0 0 0 0 rgba(59, 165, 93, 0); }
}
.hero h1 {
  font-size: clamp(38px, 5.2vw, 58px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
}
.hero h1 .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 520px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* hero 右侧：聊天窗口模拟 */
.chat-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: floatY 7s ease-in-out infinite;
}
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.chat-titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}
.chat-titlebar .tl { width: 11px; height: 11px; border-radius: 50%; }
.chat-titlebar .tl.r { background: #ff5f57; } .chat-titlebar .tl.y { background: #febc2e; } .chat-titlebar .tl.g { background: #28c840; }
.chat-titlebar span { margin-left: 8px; color: var(--text-dim); font-size: 13.5px; }
.chat-body { padding: 20px 18px 16px; display: flex; flex-direction: column; gap: 14px; min-height: 218px; }
.chat-msg {
  display: flex;
  gap: 12px;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.chat-msg.show { opacity: 1; transform: translateY(0); }
.chat-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 15px;
  color: #fff;
  flex: none;
}
.chat-avatar.a { background: linear-gradient(135deg, #5865f2, #7c3aed); }
.chat-avatar.b { background: linear-gradient(135deg, #3ba55d, #16a085); }
.chat-bubble .name { font-size: 13.5px; font-weight: 700; margin-bottom: 3px; }
.chat-bubble .name .time { color: var(--text-faint); font-weight: 400; font-size: 12px; margin-left: 7px; }
.chat-bubble .txt {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--border);
  padding: 9px 13px;
  border-radius: 4px 12px 12px 12px;
  font-size: 14px;
  color: var(--text);
}
.chat-status {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--green);
  font-size: 12.5px;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.chat-status.show { opacity: 1; }
.chat-status .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }

/* ---------- 区块标题 ---------- */
.sec-head { text-align: center; margin-bottom: 56px; }
.sec-eyebrow {
  display: inline-block;
  color: var(--brand);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.sec-head h2 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; letter-spacing: -0.4px; }
.sec-head p { color: var(--text-dim); margin-top: 12px; font-size: 16.5px; }

/* ---------- 功能卡片网格 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.fcard {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease, background 0.28s;
  overflow: hidden;
}
.fcard::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity 0.28s;
}
.fcard:hover {
  transform: translateY(-6px);
  border-color: rgba(88, 101, 242, 0.5);
  background: var(--card-hover);
  box-shadow: var(--shadow);
}
.fcard:hover::before { opacity: 1; }
.fcard-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  display: grid;
  place-items: center;
  margin-bottom: 20px;
}
.fcard-icon svg { width: 24px; height: 24px; }
.fcard h3 { font-size: 18.5px; margin-bottom: 10px; font-weight: 700; }
.fcard p { color: var(--text-dim); font-size: 14.5px; }

/* ---------- 安全亮点（大卡） ---------- */
.sec-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  transition: transform 0.28s, border-color 0.28s, box-shadow 0.28s;
}
.sec-card:hover { transform: translateY(-5px); border-color: rgba(88, 101, 242, 0.45); box-shadow: var(--shadow); }
.sec-card .shield {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--brand-soft);
  display: grid; place-items: center;
  color: var(--brand);
  margin-bottom: 20px;
}
.sec-card .shield svg { width: 26px; height: 26px; }
.sec-card h3 { font-size: 19px; margin-bottom: 10px; }
.sec-card p { color: var(--text-dim); font-size: 14.5px; }

/* ---------- 数据带 ---------- */
.stats-band {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(88, 101, 242, 0.04);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 52px 0; }
.stat { text-align: center; }
.stat .num {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.2;
}
.stat .label { color: var(--text-dim); font-size: 14px; margin-top: 6px; }

/* ---------- 下载区 ---------- */
.dl-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.dl-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  text-align: center;
  transition: transform 0.28s, border-color 0.28s, box-shadow 0.28s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.dl-card:hover { transform: translateY(-6px); border-color: rgba(88, 101, 242, 0.5); box-shadow: var(--shadow); }
.dl-icon { width: 54px; height: 54px; color: var(--text); }
.dl-icon svg { width: 100%; height: 100%; }
.dl-card h3 { font-size: 17px; }
.dl-card .meta { color: var(--text-faint); font-size: 12.5px; margin-top: -8px; }
.dl-card .btn { margin-top: 4px; width: 100%; justify-content: center; }

/* ---------- CTA 带 ---------- */
.cta-band {
  position: relative;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse 80% 130% at 20% -20%, rgba(88, 101, 242, 0.35), transparent 60%),
    radial-gradient(ellipse 70% 120% at 90% 130%, rgba(139, 92, 246, 0.25), transparent 60%),
    var(--card);
  border: 1px solid var(--border-strong);
  padding: 60px 48px;
  text-align: center;
  overflow: hidden;
}
.cta-band h2 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 800; margin-bottom: 12px; }
.cta-band p { color: var(--text-dim); margin-bottom: 30px; }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 52px 0 34px;
  background: var(--bg-soft);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}
.footer-brand p { color: var(--text-dim); font-size: 14px; margin-top: 12px; max-width: 300px; }
.footer h4 { font-size: 14px; margin-bottom: 16px; color: var(--text); }
.footer-col a {
  display: block;
  color: var(--text-dim);
  font-size: 14px;
  padding: 5px 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--brand); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--text-faint);
  font-size: 13px;
}

/* ---------- 页头（内页 hero） ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 72px) 0 64px;
  text-align: center;
  overflow: hidden;
}
.page-hero h1 { font-size: clamp(32px, 4.6vw, 50px); font-weight: 800; letter-spacing: -0.5px; margin-bottom: 16px; }
.page-hero .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.page-hero p { color: var(--text-dim); font-size: 17px; max-width: 640px; margin: 0 auto; }

/* ---------- 功能详情页 ---------- */
.feat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 44px 0;
}
.feat-row + .feat-row { border-top: 1px solid var(--border); }
.feat-row.flip .feat-visual { order: -1; }
.feat-copy .sec-eyebrow { margin-bottom: 10px; }
.feat-copy h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; margin-bottom: 14px; letter-spacing: -0.3px; }
.feat-copy > p { color: var(--text-dim); margin-bottom: 22px; }
.feat-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.feat-list li { display: flex; gap: 11px; align-items: flex-start; color: var(--text-dim); font-size: 15px; }
.feat-list li svg { width: 19px; height: 19px; color: var(--green); flex: none; margin-top: 4px; }
.feat-list li b { color: var(--text); font-weight: 600; }
.feat-visual {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow);
}

/* 可视化小部件通用 */
.widget-title { font-size: 13px; color: var(--text-faint); margin-bottom: 14px; letter-spacing: 1px; text-transform: uppercase; }
.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 8px 15px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--text-dim);
}
.chip.hl { border-color: rgba(88, 101, 242, 0.55); color: var(--text); background: var(--brand-soft); }
.mock-list { display: flex; flex-direction: column; gap: 12px; }
.mock-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 11px;
  font-size: 14px;
  color: var(--text-dim);
}
.mock-item .ic { color: var(--brand); display: grid; place-items: center; }
.mock-item .ic svg { width: 18px; height: 18px; }
.mock-item b { color: var(--text); font-weight: 600; }
.mock-item .tag {
  margin-left: auto;
  font-size: 11.5px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(59, 165, 93, 0.14);
  color: var(--green);
  border: 1px solid rgba(59, 165, 93, 0.3);
}
.mock-item .tag.warn { background: rgba(254, 188, 46, 0.12); color: #febc2e; border-color: rgba(254, 188, 46, 0.3); }

/* 语音房间示意 */
.voice-room { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; padding: 12px 0 4px; }
.voice-user { text-align: center; width: 84px; }
.voice-user .ava {
  width: 62px; height: 62px;
  margin: 0 auto 9px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 19px;
  color: #fff;
  position: relative;
}
.voice-user .ava.speaking { box-shadow: 0 0 0 3px var(--bg), 0 0 0 6px var(--green); }
.voice-user .ava.muted { opacity: 0.55; }
.voice-user .ava.muted::after {
  content: "";
  position: absolute;
  right: -2px; bottom: -2px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #ed4245 url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M12 15a3 3 0 0 0 3-3V6a3 3 0 1 0-6 0v6a3 3 0 0 0 3 3zm5-3a5 5 0 0 1-10 0H5a7 7 0 0 0 6 6.92V21h2v-2.08A7 7 0 0 0 19 12h-2z"/></svg>') center/12px no-repeat;
  border: 2px solid var(--bg);
}
.voice-user .nm { font-size: 12.5px; color: var(--text-dim); }

/* ---------- 关于页 ---------- */
.about-lead {
  font-size: 19px;
  color: var(--text);
  max-width: 780px;
  margin: 0 auto 18px;
  text-align: center;
}
.about-quote {
  text-align: center;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  margin: 40px auto 0;
  max-width: 720px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stack-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.timeline { position: relative; margin: 0 auto; max-width: 720px; padding-left: 30px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand), transparent);
}
.tl-item { position: relative; padding: 0 0 34px 22px; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -28px; top: 7px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--brand);
}
.tl-item .when { color: var(--brand); font-size: 13px; font-weight: 700; letter-spacing: 1px; }
.tl-item h3 { font-size: 17.5px; margin: 5px 0 6px; }
.tl-item p { color: var(--text-dim); font-size: 14.5px; }

/* ---------- 滚动渐入动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: opacity, transform;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }
.reveal-d4 { transition-delay: 0.32s; }
.reveal-d5 { transition-delay: 0.4s; }
.reveal-d6 { transition-delay: 0.48s; }

/* 页面载入淡入 */
body { animation: pageIn 0.5s ease; }
@keyframes pageIn { from { opacity: 0; } to { opacity: 1; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-sub { max-width: 100%; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .dl-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .feat-row { grid-template-columns: 1fr; gap: 30px; padding: 36px 0; }
  .feat-row.flip .feat-visual { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stack-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 68px 0; }
  .grid-3, .grid-2, .dl-grid { grid-template-columns: 1fr; }
  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(13, 14, 19, 0.97);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px 18px;
    gap: 4px;
    display: none;
    backdrop-filter: blur(16px);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; font-size: 16px; }
  .nav-burger { display: grid; }
  .nav-cta { margin: 8px 0 0; }
  .cta-band { padding: 44px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .stack-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}