:root {
    --ink: #203a2d;
    --muted: #6e776b;
    --paper: #f3f6ec;
    --card: #fffdf4;
    --line: #d8dec9;
    --green: #2d6b4a;
    --leaf: #9bb66f;
    --red: #b45543;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "PingFang SC", "Microsoft YaHei", ui-sans-serif, sans-serif; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--leaf); outline-offset: 4px; border-radius: 4px; }
.page-shell { overflow: hidden; }
.site-header, .hero, .feature-section, .about-section, .site-footer { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; padding: 24px 0; }
.brand { display: inline-flex; align-items: center; gap: 8px; min-width: 0; }
.brand-name { color: var(--ink); font-size: .98rem; font-weight: 800; white-space: nowrap; }
.brand-logo { display: block; width: 104px; max-height: 46px; object-fit: contain; }
.site-nav { display: flex; gap: 24px; color: var(--muted); font-size: .9rem; }
.site-nav a:hover, .footer-links a:hover { color: var(--green); }
.hero { position: relative; display: grid; grid-template-columns: 120px minmax(0, 1fr); align-items: center; gap: 48px; min-height: 570px; padding: 64px 0 96px; }
.bookmark { width: 86px; height: 390px; background: linear-gradient(180deg, var(--green), #163425); clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 86%, 0 100%); box-shadow: 18px 18px 0 rgba(45,107,74,.12); }
.eyebrow { margin: 0 0 16px; color: var(--red); font-size: .78rem; font-weight: 900; letter-spacing: .18em; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.13; letter-spacing: -.035em; }
h1 { max-width: 700px; margin-bottom: 24px; font-size: clamp(3rem, 6vw, 5.8rem); }
h2 { max-width: 760px; margin-bottom: 24px; font-size: clamp(2rem, 3.8vw, 3.4rem); }
h3 { margin-bottom: 10px; font-size: 1.16rem; }
.hero-description { max-width: 530px; margin-bottom: 30px; color: var(--muted); font-size: 1.05rem; }
.button { display: inline-flex; align-items: center; gap: 12px; padding: 13px 20px; background: var(--green); color: #fffdf4; font-size: .9rem; font-weight: 900; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); background: var(--red); }
.feature-section { padding: 40px 0 110px; border-top: 1px solid var(--line); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-grid article { min-height: 215px; padding: 28px; background: var(--card); border-left: 6px solid var(--green); }
.feature-grid span { display: block; margin-bottom: 42px; color: var(--green); font-size: 1.4rem; font-weight: 900; }
.feature-grid p, .about-section p, .site-footer p { color: var(--muted); }
.about-section { padding: 84px 0 104px; border-top: 1px solid var(--line); background: linear-gradient(90deg, rgba(155,182,111,.18), transparent); }
.about-section h2, .about-section p, .about-section .eyebrow { max-width: 760px; }
.site-footer { display: grid; grid-template-columns: 1fr auto; gap: 16px 30px; align-items: end; padding: 34px 0 42px; border-top: 1px solid var(--line); }
.footer-links { display: flex; gap: 24px; color: var(--muted); font-size: .86rem; }
.site-footer p { grid-column: 1 / -1; margin: 10px 0 0; font-size: .78rem; }
@media (max-width: 780px) { .hero { grid-template-columns: 1fr; gap: 34px; }.bookmark { width: 100%; max-width: 420px; height: 78px; clip-path: polygon(0 0, 100% 0, 88% 50%, 100% 100%, 0 100%); }.feature-grid { grid-template-columns: 1fr; }.site-footer { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .site-header, .hero, .feature-section, .about-section, .site-footer { width: min(100% - 32px, 1120px); }.site-nav { gap: 13px; font-size: .78rem; }.brand-logo { width: 128px; }.hero { min-height: 0; padding: 54px 0 78px; }.footer-links { flex-wrap: wrap; gap: 12px 18px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; }.button { transition: none; }.button:hover { transform: none; } }