/* 车机应用安装器 · 官网样式 */
:root {
  --brand: #28b894;
  --brand-dark: #20a080;
  --blue: #3b82f6;
  --ink: #191a23;
  --ink-2: #4c4f6b;
  --muted: #6b7686;
  --line: #e8ecf1;
  --soft: #f7fafc;
  --white: #fff;
  --grad: linear-gradient(135deg, #28b894, #3b82f6);
  --shadow-sm: 0 6px 20px rgba(25, 26, 35, .06);
  --shadow-md: 0 18px 48px rgba(25, 26, 35, .10);
  --shadow-lg: 0 28px 80px rgba(25, 26, 35, .16);
  --radius: 20px;
  --font: "PingFang SC", "Microsoft YaHei", Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--white); -webkit-font-smoothing: antialiased; line-height: 1.65; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.container { width: min(1200px, calc(100% - 48px)); margin: 0 auto; }
.container-narrow { width: min(860px, calc(100% - 48px)); }
.section { padding: 104px 0; position: relative; }
.section-soft { background: var(--soft); }
.sec-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.sec-tag { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px; background: rgba(40, 184, 148, .10); color: var(--brand-dark); font-size: 13px; font-weight: 700; letter-spacing: .02em; }
.sec-tag em { font-style: normal; font-size: 10px; letter-spacing: .14em; opacity: .65; font-weight: 600; }
.sec-head h2 { margin: 20px 0 14px; font-size: clamp(30px, 3.6vw, 44px); line-height: 1.25; letter-spacing: -.02em; font-weight: 800; }
.sec-head p { margin: 0; color: var(--muted); font-size: 17px; }
.sec-head.light .sec-tag { background: rgba(255, 255, 255, .12); color: #8ce9ce; }
.sec-head.light h2 { color: #fff; }
.sec-head.light p { color: rgba(255, 255, 255, .66); }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 0; border-radius: 12px; font-weight: 700; font-size: 15px; padding: 12px 22px; transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease; white-space: nowrap; }
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 26px rgba(40, 184, 148, .28); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(40, 184, 148, .36); }
.btn-ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand-dark); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--brand-dark); box-shadow: 0 12px 30px rgba(0, 0, 0, .16); }
.btn-light:hover { transform: translateY(-2px); }
.btn-lg { padding: 15px 28px; font-size: 16px; border-radius: 14px; }
.btn-sm { padding: 9px 17px; font-size: 14px; border-radius: 10px; }
.btn-block { width: 100%; padding: 15px 20px; font-size: 16px; border-radius: 13px; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .82); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid rgba(232, 236, 241, .8); transition: box-shadow .25s ease; }
.nav.scrolled { box-shadow: 0 8px 28px rgba(25, 26, 35, .07); }
.nav-inner { height: 72px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center; background: var(--grad); color: #fff; font-weight: 800; font-size: 18px; box-shadow: 0 6px 16px rgba(40, 184, 148, .30); }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text b { font-size: 16px; font-weight: 800; letter-spacing: -.01em; }
.brand-text small { font-size: 9px; letter-spacing: .16em; color: #9aa4b2; font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.nav-links a { font-size: 14px; font-weight: 600; color: var(--ink-2); position: relative; padding: 6px 0; transition: color .2s; }
.nav-links a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; border-radius: 2px; background: var(--brand); transition: width .25s; }
.nav-links a:hover, .nav-links a.active { color: var(--brand-dark); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; width: 38px; height: 38px; border: 1px solid var(--line); background: #fff; border-radius: 10px; padding: 10px; flex-direction: column; justify-content: space-between; }
.nav-toggle span { display: block; height: 2px; border-radius: 2px; background: var(--ink); }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 88px 0 0; background: linear-gradient(180deg, #fff 0%, #fbfefd 55%, #fff 100%); }
.hero-glow { position: absolute; inset: -260px -10% auto auto; width: 900px; height: 760px; background: radial-gradient(circle at 50% 50%, rgba(40, 184, 148, .20), rgba(59, 130, 246, .12) 42%, transparent 70%); filter: blur(20px); pointer-events: none; }
.hero-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(76, 79, 107, .045) 1px, transparent 1px), linear-gradient(90deg, rgba(76, 79, 107, .045) 1px, transparent 1px); background-size: 46px 46px; mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 78%); -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 78%); pointer-events: none; }
.hero-inner { position: relative; display: grid; grid-template-columns: .92fr 1.18fr; gap: 56px; align-items: center; }
.hero-copy { padding-bottom: 36px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 7px 15px; border: 1px solid rgba(40, 184, 148, .24); background: rgba(40, 184, 148, .07); color: var(--brand-dark); font-size: 12px; font-weight: 700; letter-spacing: .04em; border-radius: 999px; }
.pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 5px rgba(40, 184, 148, .16); animation: pulse 2.4s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 9px rgba(40, 184, 148, .04); } }
.hero h1 { margin: 26px 0 20px; font-size: clamp(38px, 4.6vw, 60px); line-height: 1.18; letter-spacing: -.035em; font-weight: 850; }
.hero-desc { margin: 0 0 32px; max-width: 500px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-chips { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 32px; font-size: 13px; color: var(--ink-2); font-weight: 600; }
.hero-chips i { display: inline-grid; place-items: center; width: 17px; height: 17px; margin-right: 6px; border-radius: 50%; background: rgba(40, 184, 148, .14); color: var(--brand-dark); font-size: 10px; font-style: normal; }
.hero-visual { position: relative; padding: 34px 0 46px; }
.hero-stats { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-top: 24px; }
.hero-stats > div { padding: 26px 0; text-align: center; position: relative; }
.hero-stats > div + div::before { content: ""; position: absolute; left: 0; top: 26px; bottom: 26px; width: 1px; background: var(--line); }
.hero-stats b { display: block; font-size: 28px; font-weight: 800; letter-spacing: -.02em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stats b small { font-size: 14px; margin-left: 2px; }
.hero-stats span { font-size: 13px; color: var(--muted); }

/* Product window mock */
.app-window { width: 100%; background: #f4f6f9; border: 1px solid #e3e9f0; border-radius: 16px; overflow: hidden; box-shadow: var(--shadow-lg); }
.win-bar { display: flex; align-items: center; gap: 12px; height: 42px; padding: 0 15px; background: #fff; border-bottom: 1px solid #e8edf3; }
.win-dots { display: flex; gap: 6px; }
.win-dots i { width: 9px; height: 9px; border-radius: 50%; background: #e3e8ef; }
.win-dots i:first-child { background: #ffb4a9; }
.win-dots i:nth-child(2) { background: #ffd79a; }
.win-dots i:nth-child(3) { background: #a8e6c8; }
.win-title { font-size: 12px; font-weight: 700; color: #3b4557; }
.win-title em { font-style: normal; font-size: 10px; color: #8a97a8; margin-left: 4px; }
.win-badge { margin-left: auto; font-size: 10px; color: var(--brand-dark); background: rgba(40, 184, 148, .10); padding: 3px 9px; border-radius: 6px; font-weight: 700; }
.win-body { padding: 18px; }
.win-head { display: flex; align-items: center; gap: 11px; margin-bottom: 15px; }
.win-logo { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; background: linear-gradient(135deg, #4f8df7, #2f6fe0); color: #fff; font-weight: 800; font-size: 16px; box-shadow: 0 5px 12px rgba(47, 111, 224, .28); }
.win-head strong { display: block; font-size: 14px; line-height: 1.3; }
.win-head span { display: block; font-size: 11px; color: #78879a; }
.win-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; margin-bottom: 14px; }
.ws { font-size: 10.5px; padding: 7px 5px; border-radius: 8px; text-align: center; background: #fff; border: 1px solid #e7ecf3; color: #8b95a4; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ws.done { color: var(--brand-dark); background: rgba(40, 184, 148, .08); border-color: rgba(40, 184, 148, .20); }
.ws.active { color: #2f6fe0; background: rgba(59, 130, 246, .09); border-color: rgba(59, 130, 246, .24); font-weight: 700; }
.win-cols { display: grid; grid-template-columns: 1.18fr 1fr; gap: 12px; }
.win-left, .win-right { display: flex; flex-direction: column; gap: 12px; }
.win-card { background: #fff; border: 1px solid #e8edf3; border-radius: 11px; padding: 13px; }
.wc-title { font-size: 11.5px; font-weight: 800; color: #3a4557; margin-bottom: 10px; display: flex; align-items: center; gap: 7px; }
.tag-soft { font-size: 9px; font-weight: 700; color: var(--brand-dark); background: rgba(40, 184, 148, .10); padding: 2px 7px; border-radius: 5px; }
.win-picker { border: 1px dashed #cfd9e6; border-radius: 9px; padding: 14px 8px; text-align: center; background: #fafbfd; }
.win-picker b { display: block; font-size: 12px; color: #3a4557; }
.win-picker small { display: block; font-size: 9.5px; color: #8a97a8; margin-top: 3px; }
.win-btns { display: flex; gap: 8px; }
.wb-main { flex: 1; text-align: center; padding: 9px; border-radius: 8px; color: #fff; font-size: 11.5px; font-weight: 700; background: linear-gradient(135deg, #6aa1ff, #4b82ec); box-shadow: 0 5px 12px rgba(75, 130, 236, .22); }
.wb-stop { width: 76px; text-align: center; padding: 9px; border-radius: 8px; color: #a4adba; font-size: 11.5px; background: #f3f5f8; }
.win-hint { margin-top: 8px; text-align: center; font-size: 9.5px; color: #8e9aa9; }
.win-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.win-stats > div { background: #f8fafc; border-radius: 8px; padding: 8px 9px; }
.win-stats span { display: block; font-size: 9px; color: #8a97a8; }
.win-stats b { font-size: 11px; color: #3a4557; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: #c9d2de; vertical-align: middle; margin-right: 3px; }
.dot.on { background: var(--brand); box-shadow: 0 0 0 3px rgba(40, 184, 148, .15); }
.win-progress { font-size: 10px; color: #6f7b8b; display: flex; align-items: center; gap: 7px; padding: 4px 0; }
.win-progress .ok { display: inline-grid; place-items: center; width: 14px; height: 14px; border-radius: 50%; background: rgba(40, 184, 148, .14); color: var(--brand-dark); font-size: 9px; }
.win-progress .wait { width: 14px; height: 14px; border-radius: 50%; border: 2px solid #dfe6ee; }
.float-card { position: absolute; z-index: 3; display: flex; align-items: center; gap: 10px; background: #fff; border: 1px solid rgba(232, 236, 241, .9); border-radius: 13px; padding: 11px 15px; box-shadow: var(--shadow-md); animation: float 5s ease-in-out infinite; }
.float-card b { display: block; font-size: 12px; }
.float-card small { display: block; font-size: 10px; color: var(--muted); }
.float-ico { width: 28px; height: 28px; border-radius: 9px; display: grid; place-items: center; background: rgba(40, 184, 148, .13); color: var(--brand-dark); font-weight: 800; font-size: 14px; }
.float-ico.blue { background: rgba(59, 130, 246, .12); color: var(--blue); }
.float-ok { top: 8px; right: -18px; border-left: 3px solid var(--brand); }
.float-net { bottom: 12px; left: -26px; animation-delay: -2.4s; }
@keyframes float { 50% { transform: translateY(-8px); } }

/* Features */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature-card { position: relative; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px 28px; box-shadow: var(--shadow-sm); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(40, 184, 148, .35); }
.fico { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 22px; }
.fico svg { width: 24px; height: 24px; }
.fico.green { background: rgba(40, 184, 148, .12); color: var(--brand-dark); }
.fico.blue { background: rgba(59, 130, 246, .11); color: var(--blue); }
.fico.teal { background: rgba(20, 184, 166, .12); color: #0d9488; }
.fico.purple { background: rgba(139, 92, 246, .11); color: #8b5cf6; }
.feature-card h3 { margin: 0 0 10px; font-size: 19px; font-weight: 800; }
.feature-card p { margin: 0; font-size: 14px; color: var(--muted); position: relative; z-index: 1; }
.fnum { position: absolute; right: 16px; top: 4px; font-size: 74px; font-weight: 900; color: rgba(76, 79, 107, .045); line-height: 1; letter-spacing: -.06em; }

/* Steps */
.steps-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.step-list { display: flex; flex-direction: column; gap: 12px; }
.step-item { display: flex; align-items: flex-start; gap: 16px; text-align: left; width: 100%; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; transition: all .22s ease; }
.step-item:hover { border-color: rgba(40, 184, 148, .4); }
.step-item.active { border-color: transparent; background: #fff; box-shadow: var(--shadow-md); outline: 2px solid rgba(40, 184, 148, .45); }
.step-n { flex-shrink: 0; width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center; background: var(--soft); color: var(--muted); font-weight: 800; font-size: 14px; transition: all .22s ease; }
.step-item.active .step-n { background: var(--grad); color: #fff; }
.step-item b { display: block; font-size: 16px; margin-bottom: 3px; }
.step-item small { display: block; font-size: 13px; color: var(--muted); line-height: 1.5; }
.step-panel { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 26px 28px 30px; box-shadow: var(--shadow-md); min-height: 470px; }
.panel-top { display: flex; justify-content: space-between; align-items: center; }
.panel-kicker { font-size: 11px; font-weight: 800; color: #9aa4b2; letter-spacing: .14em; }
.panel-kicker b { color: var(--brand-dark); font-size: 14px; }
.panel-badge { font-size: 11px; color: var(--brand-dark); background: rgba(40, 184, 148, .10); padding: 5px 11px; border-radius: 999px; font-weight: 700; }
.panel-illus { height: 150px; margin: 22px 0 24px; border-radius: 16px; background: linear-gradient(135deg, rgba(40, 184, 148, .09), rgba(59, 130, 246, .09)); position: relative; display: grid; place-items: center; overflow: hidden; }
.panel-illus::before { content: ""; position: absolute; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(40, 184, 148, .18), transparent 68%); }
.illus-icon { position: relative; font-size: 46px; color: var(--brand); opacity: .75; line-height: 1; }
.illus-lines { position: absolute; left: 24px; bottom: 22px; display: flex; flex-direction: column; gap: 7px; }
.illus-lines i { display: block; height: 5px; width: 74px; border-radius: 4px; background: rgba(76, 79, 107, .13); }
.illus-lines i:nth-child(2) { width: 54px; }
.illus-lines i:nth-child(3) { width: 62px; }
.illus-check { position: absolute; right: 22px; top: 18px; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--brand); color: #fff; font-size: 15px; box-shadow: 0 6px 16px rgba(40, 184, 148, .32); }
.step-panel h3 { margin: 0 0 10px; font-size: 22px; }
.step-panel > p { margin: 0; color: var(--muted); font-size: 15px; }
.panel-tips { margin: 20px 0 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.panel-tips li { position: relative; padding-left: 20px; font-size: 13px; color: var(--ink-2); }
.panel-tips li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 800; }

/* Showcase */
.showcase { background: linear-gradient(135deg, #1a202c, #4c4f6b); overflow: hidden; }
.showcase-glow { position: absolute; right: -120px; top: -160px; width: 700px; height: 620px; background: radial-gradient(circle, rgba(40, 184, 148, .24), transparent 66%); pointer-events: none; }
.showcase .container { position: relative; }
.showcase-stage { width: min(940px, 100%); margin: 0 auto; border-radius: 22px; padding: 14px; background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .14); box-shadow: 0 30px 90px rgba(0, 0, 0, .28); backdrop-filter: blur(6px); }
.showcase-stage .app-window { box-shadow: 0 18px 50px rgba(0, 0, 0, .24); }
.showcase-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 40px; }
.showcase-points > div { padding: 18px 20px; border-radius: 14px; background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .10); }
.showcase-points span { display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; background: rgba(40, 184, 148, .22); color: #8ce9ce; font-size: 12px; margin-bottom: 10px; }
.showcase-points b { display: block; color: #fff; font-size: 15px; }
.showcase-points small { display: block; color: rgba(255, 255, 255, .60); font-size: 12px; margin-top: 4px; }

/* Download */
.download-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.dl-card { min-width: 0; background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 28px; box-shadow: var(--shadow-md); }
.dl-head { display: flex; align-items: center; gap: 14px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.dl-ico { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; background: rgba(59, 130, 246, .10); color: var(--blue); }
.dl-ico svg { width: 24px; height: 24px; fill: currentColor; stroke: none; }
.dl-head b { display: block; font-size: 17px; }
.dl-head small { display: block; font-size: 12px; color: var(--muted); }
.dl-ver { margin-left: auto; font-size: 12px; font-weight: 800; color: var(--brand-dark); background: rgba(40, 184, 148, .10); padding: 5px 11px; border-radius: 999px; }
.dl-specs { list-style: none; padding: 0; margin: 20px 0 24px; }
.dl-specs li { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; font-size: 14px; border-bottom: 1px dashed #eef2f6; }
.dl-specs li:last-child { border-bottom: 0; }
.dl-specs span { color: var(--muted); flex-shrink: 0; }
.dl-specs b { font-weight: 700; text-align: right; }
.sha-row { display: flex; align-items: center; gap: 9px; margin-top: 16px; font-size: 11px; color: var(--muted); }
.sha-row > span { flex-shrink: 0; font-weight: 700; }
.sha-row code { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; background: var(--soft); border: 1px solid var(--line); border-radius: 7px; padding: 6px 9px; font-family: "SF Mono", Consolas, monospace; font-size: 10.5px; }
.sha-row button { border: 1px solid var(--line); background: #fff; border-radius: 7px; padding: 6px 10px; font-size: 11px; color: var(--ink-2); }
.sha-row button:hover { border-color: var(--brand); color: var(--brand-dark); }
.dl-notes { min-width: 0; padding: 8px 4px; }
.dl-notes h3 { font-size: 21px; margin: 0 0 18px; }
.note-item { display: flex; gap: 13px; margin-bottom: 16px; }
.note-item > span { flex-shrink: 0; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; background: rgba(40, 184, 148, .10); color: var(--brand-dark); font-size: 12px; font-weight: 800; }
.note-item p { margin: 0; font-size: 14px; color: var(--muted); }
.note-item b { color: var(--ink); display: block; font-size: 15px; }
.note-safety { margin-top: 22px; padding: 14px 16px; border-radius: 12px; background: #fff8ed; border: 1px solid #f7e3c4; color: #9a6b26; font-size: 12.5px; line-height: 1.6; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-list details { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 0 20px; transition: box-shadow .2s, border-color .2s; }
.faq-list details[open] { box-shadow: var(--shadow-sm); border-color: rgba(40, 184, 148, .32); }
.faq-list summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 0; font-size: 15.5px; font-weight: 700; cursor: pointer; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary i { position: relative; flex-shrink: 0; width: 16px; height: 16px; }
.faq-list summary i::before, .faq-list summary i::after { content: ""; position: absolute; left: 2px; top: 7px; width: 12px; height: 2px; border-radius: 2px; background: var(--brand); transition: transform .2s; }
.faq-list summary i::after { transform: rotate(90deg); }
.faq-list details[open] summary i::after { transform: rotate(0); }
.faq-list p { margin: 0 0 20px; color: var(--muted); font-size: 14px; line-height: 1.8; }

/* CTA */
.cta-band { background: var(--grad); padding: 62px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-inner h2 { margin: 0 0 8px; color: #fff; font-size: 32px; letter-spacing: -.02em; }
.cta-inner p { margin: 0; color: rgba(255, 255, 255, .86); font-size: 15px; }

/* Footer */
.footer { background: #14161f; color: #c5cbd6; padding: 62px 0 0; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 44px; }
.footer .brand-mark { width: 34px; height: 34px; font-size: 16px; }
.footer .brand-text b { color: #fff; }
.footer-brand p { margin: 18px 0 0; max-width: 360px; font-size: 13px; color: #8d96a5; line-height: 1.8; }
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col b { color: #fff; font-size: 14px; margin-bottom: 4px; }
.footer-col a { font-size: 13px; color: #8d96a5; transition: color .2s; }
.footer-col a:hover { color: var(--brand); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid rgba(255, 255, 255, .08); padding: 20px 0 26px; font-size: 12px; color: #757e8d; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .hero-copy { text-align: center; padding-bottom: 0; }
  .hero-desc, .hero-chips, .hero-actions { margin-left: auto; margin-right: auto; justify-content: center; }
  .hero-visual { width: min(760px, 100%); margin: 0 auto; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-layout, .download-grid { grid-template-columns: minmax(0, 1fr); }
  .step-panel { min-height: 0; }
  .showcase-points { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .nav-links { position: absolute; top: 72px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; background: #fff; padding: 12px 24px 20px; box-shadow: var(--shadow-md); border-bottom: 1px solid var(--line); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 4px; border-bottom: 1px solid #f2f5f8; }
  .nav-links a::after { display: none; }
  .nav-toggle { display: flex; }
  .nav-actions { margin-left: auto; }
  .section { padding: 76px 0; }
  .hero { padding-top: 60px; }
}
@media (max-width: 640px) {
  .container { width: calc(100% - 32px); }
  .container-narrow { width: calc(100% - 32px); }
  .nav-inner { gap: 10px; }
  .brand-mark { width: 34px; height: 34px; font-size: 16px; }
  .brand-text b { font-size: 14px; }
  .brand-text small { display: none; }
  .nav-actions { gap: 8px; }
  .nav-actions .btn-sm { padding: 8px 10px; font-size: 12px; }
  .nav-toggle { width: 34px; height: 34px; padding: 9px; }
  .hero h1 { font-size: 36px; }
  .hero-desc { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .float-ok { right: -4px; top: -6px; }
  .float-net { left: -4px; bottom: -4px; }
  .float-card { padding: 8px 11px; }
  .float-card small { display: none; }
  .win-body { padding: 12px; }
  .win-steps { grid-template-columns: repeat(2, 1fr); }
  .win-cols { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats > div:nth-child(3)::before { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .dl-card { padding: 20px; }
  .dl-card .btn-block { white-space: normal; font-size: 14px; line-height: 1.5; }
  .dl-head { flex-wrap: wrap; }
  .dl-specs li { flex-wrap: wrap; }
  .dl-specs b { min-width: 0; text-align: left; overflow-wrap: anywhere; }
  .sha-row { flex-wrap: wrap; }
  .sha-row code { flex: 1 1 100%; order: 3; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: 6px; }
  .showcase-stage { padding: 8px; border-radius: 16px; }
  .cta-inner h2 { font-size: 26px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}