:root { color-scheme: light; --ink: #263445; --muted: #5f6b78; --blue: #42a5f5; --line: #e7edf2; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.site-header { background: #fff; border-bottom: 1px solid #f3f5f8; }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 82px; gap: 24px; }
.brand { display: inline-flex; align-items: center; }
.brand img { display: block; width: 184px; height: auto; max-height: 55px; object-fit: contain; }
.header-nav { display: flex; gap: 28px; align-items: center; color: #4c5a69; font-size: 14px; font-weight: 600; }
.header-nav a:hover, .site-footer a:hover { color: var(--blue); }
.hero { text-align: center; overflow: hidden; }
.hero-inner { padding-top: 67px; }
.eyebrow { margin: 0 0 14px; color: #53bcb4; font-size: 12px; font-weight: 700; letter-spacing: .16em; }
.hero h1 { margin: 0; color: #36404b; font-size: clamp(30px, 4vw, 48px); font-weight: 550; letter-spacing: .02em; }
.hero-lead { margin: 16px 0 0; color: var(--muted); font-size: 18px; }
.primary-button { display: inline-flex; align-items: center; justify-content: center; gap: 14px; min-width: 180px; min-height: 48px; margin: 36px 0 24px; padding: 8px 20px; color: #fff; background: var(--blue); border-radius: 4px; box-shadow: 0 7px 18px rgb(66 165 245 / 18%); font-weight: 700; transition: transform .18s, background .18s; }
.primary-button:hover { transform: translateY(-2px); background: #218de0; }
.hero-art { display: block; width: min(100%, 1140px); height: auto; margin: 0 auto; }
.section { padding: 74px 0 82px; }
.section h2 { margin: 0; text-align: center; color: #303b47; font-size: clamp(27px, 3vw, 36px); font-weight: 600; }
.intro-text { max-width: 850px; margin: 27px auto 0; color: #52606f; font-size: 17px; line-height: 2; text-align: center; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 46px 34px; margin-top: 72px; }
.feature { text-align: center; }
.feature-icon { display: grid; width: 64px; height: 64px; margin: 0 auto 15px; place-items: center; color: #379fe9; font-size: 42px; font-weight: 300; line-height: 1; }
.feature h3 { margin: 0 0 8px; color: #394757; font-size: 19px; }
.feature p { max-width: 300px; margin: 0 auto; color: #65717e; font-size: 14px; line-height: 1.75; }
.partners { background: #fbfcfe; border-top: 1px solid var(--line); }
.partner-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; margin-top: 44px; }
.partner { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 150px; padding: 25px 12px; background: #fff; border: 1px solid #e5e9ed; border-radius: 5px; transition: box-shadow .18s, transform .18s; }
.partner:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgb(38 52 69 / 8%); }
.partner img { width: 36px; height: 36px; object-fit: contain; border-radius: 50%; }
.partner span { margin-top: 15px; color: #4c5661; font-size: 16px; font-weight: 550; }
.site-footer { border-top: 1px solid var(--line); color: #7b8793; font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; padding: 24px 0; }
@media (max-width: 800px) {
    .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 18px; }
    .partner-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .hero-inner { padding-top: 48px; }
    .section { padding: 54px 0; }
}
@media (max-width: 560px) {
    .header-inner { min-height: 68px; }
    .brand img { width: 142px; }
    .header-nav { gap: 12px; font-size: 12px; }
    .header-nav a:last-child { display: none; }
    .hero-lead { font-size: 15px; }
    .eyebrow { font-size: 10px; }
    .feature-grid, .partner-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .feature p { font-size: 13px; }
    .partner { min-height: 126px; }
    .partner span { font-size: 13px; }
    .intro-text { text-align: left; font-size: 15px; }
}