:root {
    --blue: #008ace;
    --text: #303030;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; color: var(--text); background: #fff; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; }
button { font: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
button:disabled { cursor: wait; opacity: .65; }
button:focus-visible, a:focus-visible { outline: 3px solid #008ace; outline-offset: 5px; }
[hidden] { display: none !important; }
.svg-symbols { position: absolute; width: 0; height: 0; overflow: hidden; }
svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.container { width: min(1280px, calc(100% - 64px)); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 10; height: 80px; background: #fff; box-shadow: 0 3px 12px #00000009; }
.header-inner { display: flex; height: 100%; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--blue); font-size: 28px; white-space: nowrap; }
.download-button, .trial-button { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 64px; padding: 15px 28px; border: 0; border-radius: 3px; color: #fff; background: var(--blue); font-size: 24px; }
.download-button:hover { filter: brightness(1.08); }
.trial-button { background: #ffffff40; }
.header-inner .download-button { min-height: 46px; padding: 8px 20px; font-size: 20px; gap: 8px; }
.header-inner svg { width: 21px; height: 21px; }
.hero { height: 598px; color: #fff; background: #081020 url("earth/hero.png") center / cover no-repeat; }
.hero-copy { padding-top: 106px; }
h1 { margin: 0; font-size: 58px; line-height: 1.4; }
h1 span, h2 span { color: var(--blue); }
.hero-copy > p { margin: 24px 0 36px; font-size: 26px; line-height: 2.2; }
.actions { display: flex; gap: 24px; }
.actions > button { min-width: 210px; }
.hero-copy .statistics { margin: 22px 0 0; font-size: 16px; line-height: 1.8; }
.statistics strong { color: #fff; font-weight: 500; }
h2 { margin: 0; text-align: center; font-size: 44px; line-height: 1.5; }
.section-description { margin: 22px 0 64px; color: #999; text-align: center; font-size: 22px; line-height: 1.8; }
.features { padding-top: 60px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card { position: relative; display: block; min-width: 0; height: 120px; padding: 14px 18px; border: 1px solid #e8e8e8; border-radius: 3px; color: #333; background: #fff; text-align: left; }
.feature-icon { display: grid; place-items: center; width: 34px; height: 34px; color: var(--blue); background: #eaf6fc; border-radius: 50%; }
.feature-icon svg { width: 22px; height: 22px; }
.feature-card strong { display: block; margin: 8px 0; font-size: 16px; font-weight: 500; }
.feature-card small { display: block; color: #aaa; font-size: 12px; line-height: 1.5; }
.feature-card .arrow { position: absolute; top: 46px; right: 20px; color: #aaa; font-size: 24px; }
.scenarios { padding-top: 148px; }
.scenario-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.scenario-card { position: relative; aspect-ratio: 625 / 288; color: #fff; overflow: hidden; border-radius: 5px; }
.scenario-card > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.scenario-card > div { position: relative; padding: 42px 30px; }
.scenario-card h3 { margin: 0 0 14px; font-size: 28px; font-weight: 500; }
.scenario-card h3 svg { width: 30px; height: 30px; vertical-align: -4px; }
.scenario-card p { width: 60%; margin: 0; font-size: 18px; line-height: 2.05; }
.reviews { padding: 140px 0 150px; }
.review-title { display: flex; justify-content: center; align-items: center; gap: 0; font-size: 38px; }
.review-title::before, .review-title::after { content: ""; width: 150px; height: 2px; margin-inline: 40px; background: linear-gradient(90deg, transparent, #309ad3); }
.review-title::after { transform: scaleX(-1); }
.reviews .section-description { margin: 22px 24px 60px; font-size: 16px; }
/* 素材包未含页尾山谷图，先使用同产品首屏素材保持深蓝视觉。 */
.download-banner { padding: 48px 24px; min-height: 326px; color: #fff; text-align: center; background: linear-gradient(#002c49dd, #002c49dd), url("earth/hero.png") center / cover; }
.download-banner h2 { display: flex; justify-content: center; align-items: center; gap: 12px; font-size: 28px; font-weight: 500; }
.download-banner p { margin: 30px 0 42px; font-size: 20px; line-height: 1.8; }
.download-banner .actions { justify-content: center; }
.download-banner .version { font-size: 13px; margin: 15px 0 0; }

.review-marquee { max-width: 1600px; margin-inline: auto; overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.review-row { overflow: hidden; margin-bottom: 22px; }
.review-row:last-child { margin-bottom: 0; }
/* 两份等宽内容首尾相接，移动一组宽度即可无缝循环。 */
.review-track { width: max-content; display: flex; animation: reviews-scroll 36s linear infinite; }
.review-row:nth-child(2) .review-track { animation-direction: reverse; animation-duration: 42s; }
.review-row:nth-child(3) .review-track { animation-duration: 39s; }
/* 图片左侧间距为右侧的1.3倍，组尾留白保持一致以保证滚动衔接。 */
.review-group { display: flex; align-items: center; gap: 33.8px; padding-right: 33.8px; }
.review-item { display: flex; align-items: center; gap: 26px; }
.review-item img { width: 76px; height: 76px; object-fit: contain; }
.review-item p { display: flex; align-items: center; width: 900px; height: 68px; margin: 0; padding: 12px 30px; border: 1px solid #88abe6; border-radius: 3px; background: #fff; font-size: 20px; line-height: 1.6; white-space: nowrap; }
.review-marquee:hover .review-track, .review-marquee:focus-within .review-track { animation-play-state: paused; }
@keyframes reviews-scroll { to { transform: translateX(-50%); } }
.site-footer { display: flex; justify-content: center; flex-wrap: wrap; gap: 20px; padding: 16px 24px; font-size: 12px; color: #888; }
.site-footer button { border: 0; background: none; color: var(--blue); }
.download-status { position: fixed; z-index: 30; left: 50%; bottom: 24px; transform: translateX(-50%); max-width: calc(100% - 32px); width: max-content; padding: 14px 24px; background: #25364ef2; color: white; border-radius: 8px; font-size: 15px; box-shadow: 0 4px 20px #0002; }


@media (max-width: 1100px) {
    .hero { background-position: 58% center; }
    h1 { font-size: 44px; }
    .hero-copy > p { font-size: 22px; }
    h2 { font-size: 34px; }
    .section-description { font-size: 18px; }
    .scenario-card > div { padding: 24px; }
    .scenario-card h3 { font-size: 23px; }
    .scenario-card p { font-size: 14px; line-height: 1.8; width: 65%; }
    .feature-card small { padding-right: 20px; }
}

@media (max-width: 700px) {
    .container { width: calc(100% - 36px); }
    .site-header { height: 68px; }
    .header-inner { gap: 8px; }
    .brand { font-size: 17px; gap: 6px; }
    .brand img { width: 32px; height: 32px; }
    .header-inner .download-button { min-height: 36px; padding: 6px 9px; font-size: 13px; gap: 4px; white-space: nowrap; }
    .header-inner svg { width: 14px; height: 14px; }
    /* 手机图文上下排布，按比例展示原图中的完整电脑，避免固定高度裁掉右侧。 */
    .hero { height: auto; background-image: none; }
    .hero::after { content: ""; display: block; width: 100%; aspect-ratio: 960 / 598; background: url("earth/hero.png") 89% center / auto 100% no-repeat; }
    .hero-copy { padding-top: 32px; padding-bottom: 12px; }
    h1 { font-size: clamp(28px, 7.6vw, 42px); }
    .hero-copy > p { margin: 16px 0 22px; font-size: 15px; line-height: 1.9; }
    .hero-copy > p br { display: none; }
    .actions { gap: 14px; }
    .actions > button { min-width: 0; min-height: 48px; padding: 10px 20px; gap: 10px; font-size: 17px; }
    .hero .actions > button { flex: 1; padding-inline: 12px; }
    .actions svg { width: 20px; height: 20px; }
    .hero-copy .statistics { font-size: 13px; margin-top: 16px; }
    h2 { font-size: 25px; }
    .section-description { font-size: 14px; margin: 16px 0 28px; }
    .features { padding-top: 44px; }
    .feature-grid { grid-template-columns: 1fr; gap: 12px; }
    .feature-card { height: 124px; }
    .feature-card strong { font-size: 17px; }
    .scenarios { padding-top: 64px; }
    .scenario-grid { grid-template-columns: 1fr; gap: 18px; }
    .scenario-card { min-height: 230px; aspect-ratio: auto; min-width: 0; }
    .scenario-card > div { padding: 24px 18px; }
    .scenario-card p { width: 65%; font-size: 13px; }
    .scenario-card h3 { font-size: 23px; }
    .reviews { padding: 64px 0; }
    .review-title { font-size: 25px; }
    .review-title::before, .review-title::after { width: 28px; margin-inline: 12px; }
    .reviews .section-description { font-size: 12px; margin: 18px 24px 30px; }
    .review-item { gap: 12px; }
    .review-item img { width: 48px; height: 48px; }
    .review-item p { width: 510px; height: 56px; font-size: 14px; padding-inline: 15px; }
    .review-group { gap: 15.6px; padding-right: 15.6px; }
    .review-row { margin-bottom: 14px; }
    .download-banner { min-height: 290px; padding: 40px 18px; }
    .download-banner h2 { font-size: 24px; }
    .download-banner h2 img { width: 36px; height: 36px; }
    .download-banner p { margin: 20px 0 28px; font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .review-track { animation: none; }
    .review-row { overflow-x: auto; }
    .review-marquee { mask-image: none; }
    .review-group[aria-hidden="true"] { display: none; }
}