/* ============ 智上 AI 上货助手 · 官网主题（深色科技风） ============ */
:root {
  --bg0: #070b14;
  --bg1: #0b1220;
  --bg2: #101a30;
  --card: rgba(255, 255, 255, .045);
  --card-brd: rgba(255, 255, 255, .09);
  --text: #e8ecf6;
  --muted: #8b93a7;
  --faint: #5c6478;
  --grad: linear-gradient(135deg, #e11d48, #f97316);
  --grad2: linear-gradient(135deg, #6366f1, #8b5cf6);
  --rose: #fb7185;
  --amber: #fbbf24;
  --green: #34d399;
  --radius: 16px;
  --maxw: 1160px;
  --nav-h: 68px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg0); color: var(--text); font-size: 15px; line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
::selection { background: rgba(225, 29, 72, .4); }

/* ---------- 背景装饰 ---------- */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
}
.orb {
  position: absolute; border-radius: 50%; filter: blur(90px); pointer-events: none; z-index: -1;
}

/* ---------- 容器 ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { position: relative; padding: 96px 0; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 600;
  letter-spacing: 2px; color: var(--rose); text-transform: uppercase;
  padding: 6px 14px; border: 1px solid rgba(251,113,133,.25); border-radius: 999px;
  background: rgba(251,113,133,.08); margin-bottom: 16px;
}
.section-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--grad); }
.section-title { font-size: clamp(26px, 4vw, 38px); font-weight: 800; letter-spacing: .5px; line-height: 1.25; }
.section-sub { color: var(--muted); font-size: 16px; max-width: 620px; margin-top: 12px; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100; height: var(--nav-h);
  display: flex; align-items: center; transition: background .25s, box-shadow .25s, border-color .25s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: rgba(7,11,20,.82); backdrop-filter: blur(14px); border-color: rgba(255,255,255,.07); box-shadow: 0 8px 30px rgba(0,0,0,.35); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; letter-spacing: .5px; }
.brand img { width: 34px; height: 34px; }
.brand .en { font-size: 10.5px; color: var(--faint); font-weight: 500; letter-spacing: 3px; display: block; line-height: 1; margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: var(--muted); font-size: 14.5px; transition: color .15s; }
.nav-links a:hover { color: #fff; }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-cta .login { color: var(--muted); font-size: 14px; }
.nav-cta .login:hover { color: #fff; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: 12px; font-size: 15px; font-weight: 700; cursor: pointer;
  border: 1px solid transparent; transition: transform .15s, box-shadow .2s, filter .2s; white-space: nowrap;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 24px rgba(225,29,72,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(225,29,72,.5); filter: brightness(1.05); }
.btn-ghost { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.14); color: #e8ecf6; }
.btn-ghost:hover { background: rgba(255,255,255,.1); transform: translateY(-2px); }
.burger { display: none; background: none; border: 0; color: #fff; cursor: pointer; font-size: 24px; line-height: 1; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: calc(var(--nav-h) + 40px) 0 70px; overflow: hidden; }
.hero .orb-a { width: 520px; height: 520px; top: -140px; right: -80px; background: radial-gradient(circle, rgba(225,29,72,.28), transparent 70%); }
.hero .orb-b { width: 420px; height: 420px; bottom: -160px; left: -120px; background: radial-gradient(circle, rgba(99,102,241,.22), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600;
  color: var(--rose); padding: 7px 14px; border-radius: 999px;
  border: 1px solid rgba(251,113,133,.3); background: rgba(251,113,133,.08); margin-bottom: 22px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(52,211,153,.15); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .45; } }
.hero h1 {
  font-size: clamp(34px, 5.2vw, 58px); font-weight: 900; line-height: 1.18; letter-spacing: 1px;
}
.hero h1 .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { color: var(--muted); font-size: clamp(16px, 1.6vw, 18px); margin: 22px 0 32px; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-trust { display: flex; gap: 26px; margin-top: 40px; flex-wrap: wrap; }
.hero-trust li { list-style: none; display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13.5px; }
.hero-trust li svg { width: 16px; height: 16px; stroke: var(--green); flex: none; }

/* Hero 产品窗口 */
.hero-window {
  position: relative; border: 1px solid var(--card-brd); border-radius: 18px; overflow: hidden;
  background: linear-gradient(180deg, rgba(16,26,48,.9), rgba(11,18,32,.94));
  box-shadow: 0 40px 90px rgba(0,0,0,.55), 0 0 0 1px rgba(255,255,255,.04);
  backdrop-filter: blur(8px);
}
.hero-window::before { content: ""; position: absolute; inset: 0; border-radius: 18px; padding: 1px;
  background: linear-gradient(135deg, rgba(225,29,72,.5), rgba(249,115,22,.2), rgba(99,102,241,.35));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none; }
.window-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,.07); }
.window-bar i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.window-bar i:nth-child(1) { background: #ff5f57; } .window-bar i:nth-child(2) { background: #febc2e; } .window-bar i:nth-child(3) { background: #28c840; }
.window-bar .url { flex: 1; margin-left: 10px; font-size: 12px; color: var(--faint); background: rgba(255,255,255,.05);
  border-radius: 6px; padding: 4px 12px; }
.carousel { position: relative; height: 340px; }
.carousel .slide { position: absolute; inset: 0; opacity: 0; transition: opacity .7s ease; }
.carousel .slide.active { opacity: 1; }
.carousel .slide img { width: 100%; height: 100%; object-fit: cover; }
.carousel .slide .cap { position: absolute; left: 14px; bottom: 14px; font-size: 12px; font-weight: 600; color: #fff;
  background: rgba(7,11,20,.72); backdrop-filter: blur(6px); padding: 6px 12px; border-radius: 8px; }
.window-pills { display: flex; gap: 8px; padding: 12px 16px; flex-wrap: wrap; border-top: 1px solid rgba(255,255,255,.07); }
.pill { font-size: 12px; color: var(--muted); border: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.04);
  padding: 4px 10px; border-radius: 999px; }
.pill b { color: var(--rose); font-weight: 700; }
.window-tag { position: absolute; top: 60px; right: -14px; z-index: 3;
  background: var(--grad); color: #fff; font-size: 12.5px; font-weight: 700;
  padding: 9px 16px; border-radius: 12px; box-shadow: 0 10px 28px rgba(225,29,72,.45);
  transform: rotate(3deg); }
.window-tag small { display: block; font-size: 10px; font-weight: 500; opacity: .85; }

/* ---------- 统计条 ---------- */
.stats { padding: 0; margin-top: -30px; position: relative; z-index: 5; }
.stats .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  background: var(--card); border: 1px solid var(--card-brd); border-radius: 20px;
  padding: 30px 28px; backdrop-filter: blur(10px); }
.stat { text-align: center; padding: 6px 10px; }
.stat .num { font-size: clamp(26px, 3.4vw, 40px); font-weight: 900; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; line-height: 1.1; }
.stat .num.plain { background: none; -webkit-text-fill-color: initial; color: var(--text); }
.stat .lbl { color: var(--muted); font-size: 13px; margin-top: 6px; }

/* ---------- 通用卡片网格 ---------- */
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 44px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 44px; }
.card {
  position: relative; background: var(--card); border: 1px solid var(--card-brd); border-radius: var(--radius);
  padding: 28px; overflow: hidden; transition: transform .25s, border-color .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-5px); border-color: rgba(255,255,255,.16); box-shadow: 0 24px 48px rgba(0,0,0,.45); }
.card::after { content: ""; position: absolute; right: -30px; top: -30px; width: 110px; height: 110px; border-radius: 50%;
  background: radial-gradient(circle, rgba(225,29,72,.12), transparent 70%); pointer-events: none; }
.card .ico { width: 46px; height: 46px; border-radius: 13px; display: flex; align-items: center; justify-content: center;
  background: var(--grad); box-shadow: 0 8px 22px rgba(225,29,72,.35); margin-bottom: 18px; }
.card .ico svg { width: 22px; height: 22px; stroke: #fff; }
.card .ico.violet { background: var(--grad2); box-shadow: 0 8px 22px rgba(99,102,241,.35); }
.card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 14px; }
.card .link { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; color: var(--rose); font-size: 13.5px; font-weight: 600; }
.card .link svg { width: 15px; height: 15px; }

/* ---------- 痛点 ---------- */
.pain .card { display: flex; gap: 20px; align-items: flex-start; }
.pain .card .q { font-size: 22px; font-weight: 900; color: var(--faint); line-height: 1; flex: none; }
.pain .card h3 { margin-bottom: 8px; }
.pain .solve { color: var(--green); font-size: 13.5px; font-weight: 600; margin-top: 12px; display: block; }

/* ---------- 流程 ---------- */
.flow-line { position: relative; margin-top: 56px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.flow-line::before { content: ""; position: absolute; top: 26px; left: 8%; right: 8%; height: 2px;
  background: linear-gradient(90deg, transparent, rgba(225,29,72,.5), rgba(99,102,241,.5), transparent); }
.step { position: relative; text-align: center; padding: 0 8px; }
.step .no { width: 52px; height: 52px; margin: 0 auto 16px; border-radius: 16px; position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 900; color: #fff;
  background: var(--bg2); border: 1px solid rgba(255,255,255,.14); box-shadow: 0 8px 24px rgba(0,0,0,.4); }
.step:nth-child(odd) .no { background: var(--grad); box-shadow: 0 8px 24px rgba(225,29,72,.4); }
.step:nth-child(even) .no { background: var(--grad2); box-shadow: 0 8px 24px rgba(99,102,241,.4); }
.step h4 { font-size: 15.5px; font-weight: 700; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 13px; }

/* ---------- 安全 ---------- */
.safety { background: linear-gradient(180deg, var(--bg1), var(--bg0)); }
.safety .grid2 { grid-template-columns: repeat(4, 1fr); }
.safety .card { text-align: center; padding: 30px 22px; }
.safety .card .ico { margin: 0 auto 18px; }
.safety .card h3 { font-size: 15.5px; }

/* ---------- 展示 ---------- */
.showcase { background: var(--bg1); }
.showcase-group { margin-top: 44px; }
.showcase-group h4 { display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.showcase-group h4::before { content: ""; width: 4px; height: 16px; border-radius: 2px; background: var(--grad); flex: none; }
.showcase-group h4 .tip { font-size: 12.5px; color: var(--faint); font-weight: 400; }
.showcase-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.showcase-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.showcase-grid .cell, .showcase-pair .cell {
  position: relative; border-radius: 12px; overflow: hidden; cursor: zoom-in;
  border: 1px solid var(--card-brd); background: #0d1424;
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.showcase-grid .cell:hover, .showcase-pair .cell:hover { transform: translateY(-3px); border-color: rgba(255,255,255,.2); box-shadow: 0 18px 36px rgba(0,0,0,.4); }
.showcase-grid .cell img { width: 100%; height: 262px; object-fit: contain; display: block; }
.showcase-pair .cell img { width: 100%; height: 380px; object-fit: contain; display: block; }
.showcase-grid .cell .tag, .showcase-pair .cell .tag {
  position: absolute; left: 10px; top: 10px; font-size: 11px; font-weight: 600; color: #fff;
  background: rgba(7,11,20,.72); backdrop-filter: blur(4px); padding: 4px 10px; border-radius: 8px;
}

/* ---------- 下载 Agent ---------- */
.download { background: linear-gradient(180deg, var(--bg0), var(--bg1)); }
.download-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 18px; margin-top: 44px; }
.download-grid .card { padding: 32px; }
.download-grid .card h3 { font-size: 18px; font-weight: 700; margin-bottom: 18px; }
.download-info ul { list-style: none; margin-bottom: 24px; }
.download-info ul li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--muted); padding: 6px 0; }
.download-info ul li svg { width: 16px; height: 16px; stroke: var(--green); flex: none; margin-top: 4px; }
.btn-big { padding: 14px 30px; font-size: 16px; }
.download-info .ver { color: var(--faint); font-size: 12.5px; margin-top: 14px; }
.dl-pass {
  display: flex; align-items: center; gap: 14px; margin-top: 18px; padding: 14px 16px;
  border: 1.5px dashed rgba(251,113,133,.55); border-radius: 12px; background: rgba(251,113,133,.09);
}
.dl-pass .ico {
  width: 42px; height: 42px; border-radius: 12px; flex: none;
  background: var(--grad); display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 16px rgba(225,29,72,.4);
}
.dl-pass .ico svg { width: 22px; height: 22px; stroke: #fff; }
.dl-pass .label { font-size: 12.5px; color: var(--muted); }
.dl-pass .code { font-size: 26px; font-weight: 900; letter-spacing: 4px; color: var(--rose); line-height: 1.15; }
.download-steps ol { list-style: none; counter-reset: dl; }
.download-steps ol li { position: relative; padding: 0 0 22px 46px; font-size: 14px; color: var(--muted); counter-increment: dl; }
.download-steps ol li:last-child { padding-bottom: 6px; }
.download-steps ol li::before {
  content: counter(dl); position: absolute; left: 0; top: -2px; width: 30px; height: 30px;
  border-radius: 10px; background: var(--grad2); color: #fff; font-weight: 800;
  display: flex; align-items: center; justify-content: center; font-size: 14px;
}
.download-steps ol li b { color: var(--text); }
.download-steps code { background: rgba(255,255,255,.08); border: 1px solid var(--card-brd); padding: 2px 8px; border-radius: 6px; font-size: 12.5px; }
.download-steps .note { margin-top: 14px; font-size: 13px; color: var(--faint); border-top: 1px dashed rgba(255,255,255,.1); padding-top: 14px; }
.download-steps .note a { color: var(--rose); }

/* ---------- 图片查看器(Lightbox) ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(5,8,15,.95);
  display: none; align-items: center; justify-content: center; padding: 44px; cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 8px; box-shadow: 0 24px 70px rgba(0,0,0,.65); }
.lightbox .lb-cap { position: absolute; left: 0; right: 0; bottom: 20px; text-align: center; color: var(--muted); font-size: 14px; }
.lightbox .lb-close { position: absolute; top: 16px; right: 24px; font-size: 34px; color: #fff; cursor: pointer; line-height: 1; background: none; border: 0; opacity: .85; }
.lightbox .lb-close:hover { opacity: 1; }

/* ---------- 价格 ---------- */
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 44px; align-items: stretch; }
.price-card { position: relative; background: var(--card); border: 1px solid var(--card-brd); border-radius: var(--radius);
  padding: 30px 26px; display: flex; flex-direction: column; transition: transform .25s, border-color .25s; }
.price-card:hover { transform: translateY(-6px); border-color: rgba(255,255,255,.18); }
.price-card.hot { border-color: rgba(225,29,72,.6); background: linear-gradient(180deg, rgba(225,29,72,.09), rgba(11,18,32,.9)); box-shadow: 0 20px 50px rgba(225,29,72,.18); }
.price-card.hot::before { content: "最划算"; position: absolute; top: -13px; right: 20px; font-size: 11.5px; font-weight: 700; color: #fff;
  background: var(--grad); padding: 5px 14px; border-radius: 999px; box-shadow: 0 6px 16px rgba(225,29,72,.4); }
.price-card h3 { font-size: 16px; font-weight: 700; }
.price-card .desc { color: var(--faint); font-size: 13px; margin-top: 4px; min-height: 40px; }
.price-card .price { font-size: 34px; font-weight: 900; margin: 18px 0 4px; line-height: 1; }
.price-card .price small { font-size: 14px; font-weight: 600; color: var(--muted); }
.price-card .unit { color: var(--faint); font-size: 13px; }
.price-card ul { margin: 20px 0 24px; list-style: none; flex: 1; }
.price-card ul li { display: flex; gap: 9px; align-items: flex-start; font-size: 13.5px; color: var(--muted); padding: 5px 0; }
.price-card ul li svg { width: 15px; height: 15px; stroke: var(--green); flex: none; margin-top: 3px; }
.price-card .btn { width: 100%; }
.pricing-note { margin-top: 22px; color: var(--faint); font-size: 13px; text-align: center; }
.pricing-note b { color: var(--rose); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 44px auto 0; }
.faq-item { background: var(--card); border: 1px solid var(--card-brd); border-radius: 14px; margin-bottom: 12px; overflow: hidden; }
.faq-item summary { list-style: none; cursor: pointer; padding: 20px 24px; font-size: 15.5px; font-weight: 600;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; user-select: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .arr { transition: transform .25s; color: var(--rose); flex: none; }
.faq-item[open] summary .arr { transform: rotate(45deg); }
.faq-item .body { padding: 0 24px 20px; color: var(--muted); font-size: 14px; }

/* ---------- CTA ---------- */
.cta { padding: 40px 0 100px; }
.cta .box { position: relative; border-radius: 24px; padding: 64px 40px; text-align: center; overflow: hidden;
  border: 1px solid rgba(225,29,72,.4);
  background: radial-gradient(120% 140% at 50% 0%, rgba(225,29,72,.28), rgba(11,18,32,.0) 55%), var(--bg2); }
.cta .box::before { content: ""; position: absolute; inset: 0; border-radius: 24px; padding: 1px;
  background: linear-gradient(135deg, rgba(225,29,72,.6), rgba(249,115,22,.2), rgba(99,102,241,.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none; }
.cta h2 { font-size: clamp(24px, 3.6vw, 36px); font-weight: 900; }
.cta p { color: var(--muted); margin: 14px auto 30px; max-width: 520px; }
.cta .hero-actions { justify-content: center; }
.cta .free { margin-top: 20px; display: inline-flex; align-items: center; gap: 8px; color: var(--green); font-size: 13.5px; font-weight: 600; }
.cta .free svg { width: 16px; height: 16px; }

/* ---------- 页脚 ---------- */
footer { border-top: 1px solid rgba(255,255,255,.07); padding: 48px 0 30px; background: var(--bg1); }
footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; }
footer h5 { font-size: 13px; font-weight: 700; color: #fff; margin-bottom: 14px; letter-spacing: 1px; }
footer a.ft { display: block; color: var(--muted); font-size: 13.5px; padding: 4px 0; transition: color .15s; }
footer a.ft:hover { color: #fff; }
footer .about p { color: var(--muted); font-size: 13.5px; margin-top: 10px; max-width: 300px; }
.foot-bottom { border-top: 1px solid rgba(255,255,255,.06); margin-top: 36px; padding-top: 20px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--faint); font-size: 12.5px; }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero .hero-right { order: -1; }
  .window-tag { right: 8px; }
  .grid3, .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-line { grid-template-columns: 1fr; gap: 26px; }
  .flow-line::before { display: none; }
  .safety .grid2, .grid2 { grid-template-columns: repeat(2, 1fr); }
  .stats .wrap { grid-template-columns: repeat(2, 1fr); }
  footer .wrap { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; position: absolute; top: var(--nav-h); left: 0; right: 0; flex-direction: column;
    align-items: flex-start; gap: 4px; background: rgba(7,11,20,.97); padding: 16px 24px 22px; border-bottom: 1px solid var(--card-brd); }
  .nav-links.open a { padding: 10px 0; width: 100%; }
  .burger { display: block; }
  .nav-cta .login { display: none; }
  .grid3, .grid2, .pricing-grid, .safety .grid2 { grid-template-columns: 1fr; }
  .showcase-grid { grid-template-columns: 1fr 1fr; }
  .showcase-pair { grid-template-columns: 1fr; }
  .showcase-grid .cell img { height: 190px; }
  .showcase-pair .cell img { height: 240px; }
  .download-grid { grid-template-columns: 1fr; }
  section { padding: 70px 0; }
  .carousel { height: 240px; }
}