:root {
    --bg: #070707;
    --panel: #151515;
    --text: #ffffff;
    --muted: #b8b8b8;
    --soft: #e6e6e6;
    --red: #ed1010;
    --amber: #ffc857;
    --green: #28d17c;
    --line: rgba(255, 255, 255, .13);
    --shadow: 0 22px 55px rgba(237, 16, 16, .32);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: radial-gradient(circle at 18% 0%, rgba(237, 16, 16, .24), transparent 30rem),
                linear-gradient(180deg, #160000 0%, var(--bg) 28rem, #000 100%);
    color: var(--text);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    line-height: 1.45;
    -webkit-tap-highlight-color: transparent;
}

a, button { color: inherit; font: inherit; }
a { text-decoration: none; }
img { display: block; max-width: 100%; }
button { border: 0; cursor: pointer; }

/* 页面通用布局 */
.page { min-height: 100vh; padding-bottom: 6.4rem; overflow: hidden; }
.wrap { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

/* Hero 头部块 */
.hero { min-height: 100svh; display: grid; align-items: center; padding: 1rem 0 2.8rem; position: relative; }
.topbar { position: absolute; inset: 1rem 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .55rem; font-weight: 900; font-size: clamp(1.35rem, 5vw, 2.1rem); line-height: 1; }
.brand-mark { display: grid; place-items: center; width: 2.35rem; height: 2.35rem; border-radius: .55rem; background: var(--red); box-shadow: 0 0 22px rgba(237, 16, 16, .45); font-size: .85rem; font-weight: 1000; }
.age-pill { border: 1px solid var(--line); border-radius: 999px; padding: .45rem .75rem; color: var(--soft); background: rgba(0, 0, 0, .38); font-size: .78rem; font-weight: 800; white-space: nowrap; }

.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 440px); align-items: center; gap: clamp(2rem, 6vw, 5rem); padding-top: 4.7rem; }
.copy { max-width: 640px; }

.kicker { display: inline-flex; align-items: center; gap: .5rem; margin-bottom: 1rem; padding: .48rem .7rem; border: 1px solid rgba(255, 200, 87, .35); border-radius: 999px; background: rgba(255, 200, 87, .1); color: #ffe2a0; font-weight: 850; font-size: .88rem; }
.kicker::before { content: ""; width: .55rem; height: .55rem; border-radius: 999px; background: var(--green); box-shadow: 0 0 0 .33rem rgba(40, 209, 124, .13); }

h1 { margin: 0; max-width: 12ch; font-size: clamp(3.2rem, 10vw, 7.4rem); line-height: .86; font-weight: 1000; text-transform: uppercase; }
.subhead { margin: 1rem 0 0; max-width: 30rem; color: var(--soft); font-size: clamp(1.15rem, 4vw, 1.65rem); font-weight: 800; }
.subhead strong { color: #fff; }

.benefits { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .65rem; margin: 1.25rem 0 1.45rem; max-width: 34rem; }
.benefit { min-height: 4.25rem; padding: .72rem .78rem; border: 1px solid var(--line); border-radius: .65rem; background: rgba(255, 255, 255, .055); }
.benefit b { display: block; font-size: .94rem; line-height: 1.15; }
.benefit span { display: block; margin-top: .22rem; color: var(--muted); font-size: .78rem; }

.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem; margin-top: 1rem; }

/* 按钮与组件 */
.btn-download {
    position: relative; display: inline-flex; align-items: center; justify-content: center; gap: .75rem;
    min-height: 4.35rem; padding: 1rem 1.55rem; border-radius: .8rem;
    background: linear-gradient(180deg, #ff3434 0%, var(--red) 58%, #b40000 100%);
    color: #fff; box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, .32);
    font-weight: 1000; font-size: clamp(1.18rem, 4.8vw, 1.7rem); text-transform: uppercase;
    transition: transform .18s ease, filter .18s ease; isolation: isolate;
}
.btn-download::before {
    content: ""; width: 1.25rem; height: 1.25rem; border-radius: .28rem;
    background: linear-gradient(90deg, transparent 39%, #fff 40%, #fff 60%, transparent 61%) top / 100% 62% no-repeat,
                linear-gradient(135deg, transparent 0 36%, #fff 37% 63%, transparent 64%) bottom left / 50% 50% no-repeat,
                linear-gradient(225deg, transparent 0 36%, #fff 37% 63%, transparent 64%) bottom right / 50% 50% no-repeat;
}
.btn-download::after { content: ""; position: absolute; inset: -.28rem; border-radius: 1rem; border: 1px solid rgba(255, 255, 255, .18); z-index: -1; }
.btn-download:active { transform: scale(.97); }
.cta-note { color: var(--muted); font-size: .92rem; font-weight: 700; }

.install-strip { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1.05rem; color: #f1f1f1; font-size: .9rem; font-weight: 750; }
.install-strip span { display: inline-flex; align-items: center; gap: .38rem; }
.install-strip span::before { content: ""; width: .48rem; height: .48rem; border-radius: 999px; background: var(--green); }

/* 手机预览模型 */
.phone { position: relative; width: min(100%, 390px); margin: 0 auto; padding: .9rem; border: 1px solid rgba(255, 255, 255, .18); border-radius: 2rem; background: linear-gradient(145deg, #2a2a2a, #080808 38%, #171717); box-shadow: 0 40px 90px rgba(0, 0, 0, .55); }
.screen { min-height: 610px; border-radius: 1.35rem; overflow: hidden; background: #090909; border: 1px solid rgba(255, 255, 255, .08); }
.app-head { display: flex; align-items: center; justify-content: space-between; padding: .95rem .9rem; background: #111; border-bottom: 1px solid rgba(255, 255, 255, .08); font-weight: 900; }
.live-chip { padding: .24rem .45rem; border-radius: .35rem; background: rgba(237, 16, 16, .18); color: #ff7979; font-size: .72rem; font-weight: 950; }

.preview { position: relative; min-height: 270px; display: flex; align-items: end; padding: 1rem; background: linear-gradient(0deg, #090909 4%, rgba(9, 9, 9, .2) 50%, transparent), linear-gradient(145deg, #3a1010 0%, #101010 48%, #511313 100%); }
.media-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; opacity: .9; }
.media-img.is-missing { display: none; }

.play { position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%); width: 4.6rem; height: 4.6rem; border-radius: 999px; background: rgba(237, 16, 16, .94); z-index: 3; }
.play::after { content: ""; position: absolute; left: 1.85rem; top: 1.35rem; border-left: 1.35rem solid #fff; border-top: .88rem solid transparent; border-bottom: .88rem solid transparent; }
.preview-copy { position: relative; z-index: 3; }
.preview-copy b { display: block; font-size: 1.35rem; line-height: 1.1; }
.preview-copy span { color: var(--muted); font-size: .9rem; font-weight: 750; }

.mini-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem; padding: .8rem; }
.mini { position: relative; overflow: hidden; min-height: 7.6rem; display: flex; flex-direction: column; justify-content: end; padding: .58rem; border-radius: .8rem; background: #1a1a1a; border: 1px solid rgba(255, 255, 255, .08); }
.mini small { position: relative; z-index: 2; color: var(--amber); font-weight: 900; }
.mini b { position: relative; z-index: 2; margin-top: .1rem; font-size: .86rem; line-height: 1.15; }

.download-panel { padding: .8rem; border-top: 1px solid rgba(255, 255, 255, .08); background: #0f0f0f; }
.panel-row { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: .7rem; color: var(--muted); font-size: .82rem; font-weight: 750; }
.phone .btn-download { width: 100%; min-height: 3.45rem; font-size: 1.05rem; border-radius: .65rem; }

/* 各板块部分 */
.section { padding: clamp(2.6rem, 7vw, 5rem) 0; }
.section-title { margin: 0 0 1.15rem; font-size: clamp(1.9rem, 7vw, 3.4rem); line-height: .96; font-weight: 1000; text-transform: uppercase; max-width: 14ch; }

.reason-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .8rem; }
.reason { min-height: 10.2rem; padding: 1rem; border-radius: .8rem; background: linear-gradient(180deg, var(--panel), #0d0d0d); border: 1px solid var(--line); }
.reason .num { color: var(--red); font-size: .78rem; font-weight: 1000; }
.reason h3 { margin: .55rem 0 .42rem; font-size: 1.1rem; line-height: 1.12; }
.reason p { margin: 0; color: var(--muted); font-size: .92rem; }

.gallery { display: grid; grid-template-columns: 1.25fr .9fr .9fr; gap: .85rem; }
.shot { position: relative; overflow: hidden; min-height: 15rem; display: flex; align-items: end; padding: 1rem; border-radius: .9rem; border: 1px solid var(--line); background: #111; }
.shot:first-child { grid-row: span 2; min-height: 30.9rem; }
.shot-copy { position: relative; z-index: 2; }
.shot-copy small { display: inline-block; margin-bottom: .35rem; color: var(--amber); font-weight: 1000; text-transform: uppercase; }
.shot-copy b { display: block; max-width: 15rem; font-size: clamp(1.05rem, 3vw, 1.45rem); line-height: 1.05; }

.hot-strip { background: #f5f5f5; color: #080808; padding: 2.25rem 0; }
.hot-strip .wrap { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 1rem; align-items: center; }
.hot-strip h2 { margin: 0; font-size: clamp(1.8rem, 6vw, 3rem); line-height: 1; font-weight: 1000; text-transform: uppercase; }
.trends { display: flex; flex-wrap: wrap; gap: .55rem; justify-content: flex-end; }
.trends span { padding: .58rem .78rem; border-radius: 999px; background: #111; color: #fff; font-size: .9rem; font-weight: 850; }

.final { text-align: center; padding: clamp(3rem, 8vw, 5.5rem) 0; background: linear-gradient(180deg, #090909, #190303 55%, #000); }
.final h2 { margin: 0 auto .8rem; max-width: 12ch; font-size: clamp(2.35rem, 9vw, 5.4rem); line-height: .9; font-weight: 1000; text-transform: uppercase; }
.final p { margin: 0 auto 1.45rem; max-width: 32rem; color: var(--soft); font-size: 1.12rem; font-weight: 750; }

/* 底部固定栏与 Footer */
.sticky-cta { position: fixed; left: 0; right: 0; bottom: 0; z-index: 50; padding: .75rem .9rem max(.75rem, env(safe-area-inset-bottom)); background: rgba(5, 5, 5, .92); border-top: 1px solid rgba(255, 255, 255, .12); backdrop-filter: blur(12px); }
.sticky-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: .85rem; width: min(1120px, 100%); margin: 0 auto; }
.sticky-title { font-weight: 950; line-height: 1.1; }
.sticky-title span { display: block; margin-top: .18rem; color: var(--green); font-size: .82rem; font-weight: 850; }
.sticky-cta .btn-download { min-height: 3.25rem; padding: .75rem 1rem; border-radius: .65rem; font-size: .95rem; white-space: nowrap; }

footer { padding: 1.6rem 0 7.5rem; color: #777; border-top: 1px solid rgba(255, 255, 255, .08); background: #000; text-align: center; font-size: .75rem; }

/* 响应式媒体查询 */
@media (hover: hover) {
    .btn-download:hover { transform: translateY(-1px); filter: brightness(1.07); }
}

@media (max-width: 860px) {
    .hero { align-items: start; padding-top: .9rem; }
    .topbar { position: relative; inset: auto; }
    .hero-grid { grid-template-columns: 1fr; gap: 1.35rem; padding-top: 1.6rem; }
    .benefits { grid-template-columns: 1fr; gap: .55rem; }
    .benefit { min-height: auto; display: flex; justify-content: space-between; gap: 1rem; }
    .cta-row .btn-download, .cta-note { width: 100%; text-align: center; }
    .reason-grid, .gallery { grid-template-columns: 1fr 1fr; }
    .shot:first-child { grid-column: 1 / -1; grid-row: auto; min-height: 17rem; }
    .hot-strip .wrap { grid-template-columns: 1fr; }
    .trends { justify-content: flex-start; }
}

@media (max-width: 480px) {
    .wrap { width: min(100% - 24px, 1120px); }
    .reason-grid, .gallery { grid-template-columns: 1fr; }
    .sticky-inner { grid-template-columns: 1fr; }
    .sticky-title { display: none; }
    .sticky-cta .btn-download { width: 100%; }
}