:root {
    color-scheme: light;
    --ink: #14212b;
    --muted: #62717c;
    --paper: #f4f7f5;
    --card: #ffffff;
    --line: #d9e2dd;
    --green: #4f9d78;
    --green-dark: #24644d;
    --orange: #f1a461;
    --shadow: 0 24px 70px rgba(20, 33, 43, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Segoe UI", "Microsoft YaHei", sans-serif; }
a { color: inherit; text-decoration: none; }
.page-shell { min-height: 100vh; overflow: hidden; background: radial-gradient(circle at 85% 5%, rgba(241, 164, 97, 0.28), transparent 28rem), radial-gradient(circle at 8% 30%, rgba(79, 157, 120, 0.16), transparent 24rem); }
.site-header, main, .site-footer { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; padding: 28px 0; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: 0.02em; }
.brand-mark { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 12px 12px 12px 3px; color: white; background: var(--green-dark); box-shadow: 6px 6px 0 rgba(241, 164, 97, 0.65); }
.brand small { display: block; margin-top: 2px; color: var(--muted); font-size: 9px; letter-spacing: 0.22em; }
.site-nav { display: flex; align-items: center; gap: 28px; color: var(--muted); font-size: 14px; }
.site-nav a:hover { color: var(--green-dark); }
.site-nav .account-link { padding: 0; border: 0; color: var(--green-dark); background: transparent; font: inherit; font-weight: 800; cursor: pointer; }
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr); align-items: center; min-height: 570px; gap: 40px; }
.eyebrow { margin: 0 0 18px; color: var(--green-dark); font-size: 11px; font-weight: 800; letter-spacing: 0.22em; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 680px; margin-bottom: 24px; font-size: clamp(42px, 7vw, 78px); line-height: 1.03; letter-spacing: -0.055em; }
h1 em { color: var(--green-dark); font-style: normal; }
.hero-text { max-width: 560px; color: var(--muted); font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 700; transition: transform 180ms ease, box-shadow 180ms ease; }
.button:hover { transform: translateY(-3px); }
.button-primary { color: white; background: var(--green-dark); box-shadow: 0 12px 28px rgba(36, 100, 77, 0.25); }
.button-secondary { border: 1px solid var(--line); background: rgba(255,255,255,0.72); }
.hero-orbit { position: relative; display: grid; min-height: 420px; place-items: center; }
.orbit { position: absolute; border: 1px solid rgba(36, 100, 77, 0.28); border-radius: 50%; transform: rotate(-24deg); }
.orbit-one { width: 360px; height: 220px; }
.orbit-two { width: 260px; height: 390px; transform: rotate(52deg); border-color: rgba(241, 164, 97, 0.55); }
.signal-card { position: relative; display: grid; width: 220px; height: 220px; place-content: center; gap: 8px; padding: 26px; border: 1px solid rgba(255,255,255,0.72); border-radius: 30px; background: linear-gradient(145deg, rgba(36,100,77,0.96), rgba(20,33,43,0.98)); color: white; box-shadow: var(--shadow); transform: rotate(-7deg); }
.signal-card span { color: var(--orange); font-size: 54px; font-weight: 900; letter-spacing: -0.08em; }
.signal-card strong { font-size: 17px; letter-spacing: 0.22em; }
.signal-card small { color: rgba(255,255,255,0.65); font-size: 8px; letter-spacing: 0.18em; }
.feature-section { padding: 92px 0 110px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
h2 { max-width: 520px; margin-bottom: 0; font-size: clamp(30px, 4vw, 48px); letter-spacing: -0.04em; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { min-height: 260px; padding: 30px; border: 1px solid var(--line); border-radius: 26px; background: var(--card); box-shadow: 0 12px 34px rgba(20,33,43,0.05); }
.feature-card-dark { color: white; border-color: transparent; background: var(--ink); }
.feature-card-accent { background: #fff4e8; border-color: #f8d3ad; }
.feature-number { display: block; margin-bottom: 70px; color: var(--orange); font-size: 12px; font-weight: 800; letter-spacing: 0.18em; }
.feature-card h3 { margin-bottom: 12px; font-size: 24px; }
.feature-card p { margin-bottom: 0; color: var(--muted); line-height: 1.7; }
.feature-card-dark p { color: rgba(255,255,255,0.68); }
.site-footer { display: flex; justify-content: space-between; gap: 16px; padding: 24px 0 34px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; letter-spacing: 0.08em; }
.community-section { padding: 0 0 96px; }
.community-intro { max-width: 390px; margin: 0; color: var(--muted); line-height: 1.75; }
.community-actions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.feedback-card { display: grid; min-height: 220px; gap: 12px; padding: 30px; border: 1px solid var(--line); border-radius: 26px; background: var(--card); box-shadow: 0 12px 34px rgba(20,33,43,0.05); transition: transform 180ms ease, box-shadow 180ms ease; }
.feedback-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.feedback-card span { color: var(--green-dark); font-size: 11px; font-weight: 800; letter-spacing: .18em; }
.feedback-card strong { font-size: 28px; }
.feedback-card small { max-width: 420px; color: var(--muted); line-height: 1.7; }
.feedback-card b { align-self: end; color: var(--green-dark); font-size: 13px; }
.feedback-card-bug { background: #fff4e8; border-color: #f8d3ad; }
.feedback-card-bug span { color: #b24a3b; }
@media (max-width: 760px) { .community-section { padding-bottom: 60px; } .community-actions { grid-template-columns: 1fr; } }
@media (max-width: 760px) { .site-header, main, .site-footer { width: min(100% - 32px, 620px); } .site-nav { gap: 12px; font-size: 12px; } .hero { grid-template-columns: 1fr; min-height: auto; padding: 70px 0 40px; } .hero-orbit { min-height: 320px; } .orbit-one { width: 280px; height: 180px; } .orbit-two { width: 210px; height: 310px; } .feature-section { padding-top: 60px; } .section-heading { display: block; } .feature-grid { grid-template-columns: 1fr; } .feature-number { margin-bottom: 42px; } .site-footer { display: block; line-height: 2; } }