/* CarTV.app — 官网样式。品牌绿 #07C160(与 App AccentColor 同值)。
   中性灰底,浅色为默认;深色取 VS Code Dark Modern 配色(#1f1f1f / #181818 / #2b2b2b / #cccccc),由系统偏好(prefers-color-scheme)或 html[data-theme] 手动切换驱动,所有颜色走变量。 */
:root {
  --green: #07C160;
  --green-hover: #06AD56;
  --bg: #f5f5f7;
  --bg-2: #ffffff;
  --card: #ffffff;
  --card-border: rgba(0, 0, 0, 0.08);
  --card-border-strong: rgba(0, 0, 0, 0.18);
  --text: #1d1d1f;
  --heading: #1d1d1f;
  --text-2: #3a3a3c;
  --muted: #6e6e73;
  --muted-2: #86868b;
  --chip: rgba(0, 0, 0, 0.04);
  --nav-bg: rgba(245, 245, 247, 0.78);
  --nav-solid: rgba(245, 245, 247, 0.97);
  --shadow: rgba(0, 0, 0, 0.16);
  --store-bg: #000;
  --store-fg: #fff;
  --glow: 0.14;
  color-scheme: light;
  --max: 1120px;
  --radius: 18px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
  --bg: #1f1f1f;
  --bg-2: #181818;
  --card: #262626;
  --card-border: #2b2b2b;
  --card-border-strong: #454545;
  --text: #cccccc;
  --heading: #ffffff;
  --text-2: #bdbdbd;
  --muted: #9d9d9d;
  --muted-2: #7f7f7f;
  --chip: #2a2a2a;
  --nav-bg: rgba(24, 24, 24, 0.82);
  --nav-solid: rgba(24, 24, 24, 0.98);
  --shadow: rgba(0, 0, 0, 0.55);
  --store-bg: #f0f0f0;
  --store-fg: #1f1f1f;
  --glow: 0.16;
  color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1f1f1f;
  --bg-2: #181818;
  --card: #262626;
  --card-border: #2b2b2b;
  --card-border-strong: #454545;
  --text: #cccccc;
  --heading: #ffffff;
  --text-2: #bdbdbd;
  --muted: #9d9d9d;
  --muted-2: #7f7f7f;
  --chip: #2a2a2a;
  --nav-bg: rgba(24, 24, 24, 0.82);
  --nav-solid: rgba(24, 24, 24, 0.98);
  --shadow: rgba(0, 0, 0, 0.55);
  --store-bg: #f0f0f0;
  --store-fg: #1f1f1f;
  --glow: 0.16;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font); color: var(--text); background: var(--bg);
  line-height: 1.55; -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.hero .wrap > *, .split > *, .grid > *, .community > * { min-width: 0; }
h1, h2, h3 { margin: 0; line-height: 1.15; letter-spacing: -0.02em; text-wrap: balance; color: var(--heading); }
p { margin: 0; }
.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.muted { color: var(--muted); }
.green { color: var(--green); }

/* 导航 */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--nav-bg); backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--card-border);
}
.nav .wrap { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav-links { display: flex; gap: 22px; margin-inline-start: auto; font-size: 15px; color: var(--muted); }
.nav-links a:hover { color: var(--text); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.lang {
  appearance: none; -webkit-appearance: none; border: 1px solid var(--card-border); background: transparent; color: var(--muted); font: inherit; font-size: 13px;
  padding: 6px 10px; border-radius: 999px; cursor: pointer; max-width: 150px;
}
.lang:hover { color: var(--text); border-color: var(--card-border-strong); }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 999px;
  font-weight: 600; font-size: 15px; transition: transform .15s ease, background .15s ease; white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-hover); }
.btn-ghost { border: 1px solid var(--card-border-strong); color: var(--text); }
.btn-ghost:hover { background: var(--chip); }
.btn svg { width: 18px; height: 18px; fill: currentColor; }
.theme { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--card-border); background: transparent; color: var(--muted); display: grid; place-items: center; cursor: pointer; padding: 0; }
.theme:hover { color: var(--text); border-color: var(--card-border-strong); }
.theme svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.theme .sun { display: none; }
:root[data-theme="dark"] .theme .sun { display: block; }
:root[data-theme="dark"] .theme .moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme .sun { display: block; }
  :root:not([data-theme="light"]) .theme .moon { display: none; }
}
.nav-menu { display: none; margin-inline-start: auto; background: none; border: 0; color: var(--text); padding: 8px; cursor: pointer; }
.nav-menu svg { width: 24px; height: 24px; }

/* 首屏 */
.hero { position: relative; padding: 72px 0 40px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto; height: 120%; pointer-events: none;
  background: radial-gradient(55% 50% at 72% 35%, rgba(7, 193, 96, var(--glow)), transparent 70%);
}
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--green); margin-bottom: 18px; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 12px var(--green); }
.hero h1 { font-size: clamp(38px, 5.4vw, 64px); font-weight: 800; }
.hero .lead { font-size: 18px; color: var(--muted); margin: 20px 0 28px; max-width: 520px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.hero-meta { margin-top: 18px; font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 16px; }
.hero-meta span::before { content: "✓ "; color: var(--green); }
.hero-safety { margin-top: 10px; font-size: 12px; color: var(--muted-2); }
.hero-art { position: relative; }
.hero-art img { border-radius: var(--radius); box-shadow: 0 30px 80px var(--shadow), 0 0 0 1px var(--card-border); aspect-ratio: 3/2; object-fit: cover; }
.hero-art .glow { position: absolute; inset: 20% -10% -10%; background: radial-gradient(50% 50% at 50% 60%, rgba(7,193,96,0.28), transparent 70%); filter: blur(30px); z-index: -1; }

/* App Store 按钮 */
.store {
  display: inline-flex; align-items: center; gap: 10px; background: var(--store-bg); color: var(--store-fg); border-radius: 12px;
  padding: 8px 16px 8px 12px; line-height: 1.1; transition: transform .15s ease;
}
.store:active { transform: scale(0.97); }
.store svg { width: 26px; height: 26px; fill: currentColor; }
.store small { display: block; font-size: 10px; font-weight: 500; letter-spacing: .02em; }
.store strong { display: block; font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }

/* 通用分区 */
section { padding: 72px 0; }
.sec-head { max-width: 640px; margin-bottom: 40px; }
.sec-head h2 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; }
.sec-head p { color: var(--muted); font-size: 17px; margin-top: 12px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* 功能网格 */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 24px;
  transition: border-color .2s ease, transform .2s ease;
}
.card:hover { border-color: rgba(7,193,96,0.45); transform: translateY(-2px); }
.card .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(7,193,96,0.14); color: var(--green); margin-bottom: 16px; }
.card .ic svg { width: 24px; height: 24px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { font-size: 18px; margin-bottom: 8px; color: var(--heading); }
.card p { color: var(--muted); font-size: 15px; }

/* 截图 */
.shots { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.shots img { border-radius: 22px; box-shadow: 0 20px 50px var(--shadow), 0 0 0 1px var(--card-border); }

/* 图文分栏 */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split.flip > .art { order: 2; }
.split .art img { border-radius: var(--radius); box-shadow: 0 24px 60px var(--shadow), 0 0 0 1px var(--card-border); aspect-ratio: 3/2; object-fit: cover; }
.split h2 { font-size: clamp(28px, 3.4vw, 38px); font-weight: 800; }
.split .lead { color: var(--muted); font-size: 17px; margin: 14px 0 22px; }
.steps { display: grid; gap: 14px; }
.steps li { list-style: none; display: flex; gap: 14px; align-items: flex-start; }
.steps .n { flex: 0 0 28px; height: 28px; border-radius: 50%; background: rgba(7,193,96,0.16); color: var(--green); font-weight: 700; font-size: 13px; display: grid; place-items: center; margin-top: 2px; }
.steps b { display: block; font-size: 16px; }
.steps span { color: var(--muted); font-size: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.chips span { font-size: 13px; padding: 6px 12px; border-radius: 999px; background: var(--chip); border: 1px solid var(--card-border); color: var(--text-2); }
.chips .more { color: var(--green); border-color: rgba(7,193,96,0.35); }

/* 时刻 */
.moments { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%); }
.moments blockquote { margin: 0; font-size: 17px; color: var(--text-2); }
.moments .list { margin: 22px 0 0; padding: 0; display: grid; gap: 10px; }
.moments .list li { list-style: none; color: var(--muted); font-size: 15px; padding-inline-start: 24px; position: relative; }
.moments .list li::before { content: ""; position: absolute; inset-inline-start: 0; top: 9px; width: 10px; height: 10px; border-radius: 50%; background: var(--green); }

/* Pro */
.pro { background: var(--bg-2); }
.pro-box { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; padding: 40px; border-radius: 24px; background: linear-gradient(135deg, rgba(7,193,96,0.14), rgba(7,193,96,0.03)), var(--card); border: 1px solid rgba(7,193,96,0.3); }
.pro-box h2 { font-size: clamp(26px, 3.2vw, 36px); font-weight: 800; }
.pro-box .lead { color: var(--muted); margin-top: 12px; font-size: 16px; }
.pro-list { margin: 0; padding: 0; display: grid; gap: 12px; }
.pro-list li { list-style: none; display: flex; gap: 12px; align-items: flex-start; }
.pro-list svg { flex: 0 0 22px; width: 22px; height: 22px; stroke: var(--green); fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; margin-top: 2px; }
.pro-list b { display: block; }
.pro-list span { color: var(--muted); font-size: 14px; }
.pro-note { margin-top: 20px; font-size: 13px; color: var(--muted); }

/* 社群 */
.community { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.ch { display: flex; align-items: center; gap: 16px; padding: 18px 20px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--card-border); transition: transform .2s ease, border-color .2s ease; }
.ch:hover { transform: translateY(-2px); border-color: var(--card-border-strong); }
.ch .logo { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; flex: 0 0 48px; }
.ch .logo img, .ch .logo svg { width: 26px; height: 26px; }
.ch b { display: block; font-size: 16px; }
.ch span { color: var(--muted); font-size: 13px; }
.ch .arrow { margin-inline-start: auto; color: var(--muted); }
[dir="rtl"] .ch .arrow { transform: scaleX(-1); }

/* FAQ */
.faq { display: grid; gap: 10px; max-width: 800px; margin: 0 auto; }
.faq details { background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; padding: 4px 20px; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 16px; padding: 14px 0; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--green); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--muted); padding: 0 0 16px; font-size: 15px; }

/* 页脚 */
footer { border-top: 1px solid var(--card-border); padding: 40px 0; font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
footer a:hover { color: var(--text); }
footer .safety { width: 100%; font-size: 12px; color: var(--muted-2); }

/* 法律页 */
.doc { max-width: 760px; margin: 0 auto; padding: 56px 0 80px; }
.doc h1 { font-size: 34px; margin-bottom: 8px; }
.doc h2 { font-size: 20px; margin: 32px 0 10px; }
.doc p, .doc li { color: var(--text-2); font-size: 16px; }
.doc ul { padding-inline-start: 22px; }
.doc a { color: var(--green); }
.doc .updated { color: var(--muted); font-size: 14px; margin-bottom: 24px; }

.lang option { color: var(--text); background: var(--bg-2); }

/* 响应式 */
@media (max-width: 960px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .community { grid-template-columns: repeat(2, 1fr); }
  .hero .wrap { grid-template-columns: 1fr; gap: 36px; }
  .hero { padding-top: 48px; }
  .hero .lead { max-width: none; }
  .split, .split.flip { grid-template-columns: 1fr; gap: 28px; }
  .split.flip > .art { order: 0; }
  .pro-box { grid-template-columns: 1fr; padding: 28px; }
  .shots { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--nav-solid); border-bottom: 1px solid var(--card-border); padding: 8px 20px 16px; }
  .nav-links a { padding: 12px 0; font-size: 16px; }
  .nav.open .nav-links { display: flex; }
  .nav-menu { display: block; }
  .nav-cta .btn { display: none; }
  .nav .wrap { gap: 12px; }
  section { padding: 52px 0; }
  .hero h1 { font-size: 36px; }
  .grid, .community { grid-template-columns: 1fr; }
  .shots { display: flex; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; margin: 0 -20px; padding-inline: 20px; }
  .shots img { flex: 0 0 68%; scroll-snap-align: start; }
  .store strong { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .card, .ch, .btn, .store { transition: none; } }