:root {
    --bg: #f8f6ef;
    --surface: #fffdf7;
    --surface-2: #efeee4;
    --text: #17392e;
    --dim: #60675c;
    --border: #dcded1;
    --accent: #345c42;
    --mark: #dee7cc;
    --forest: #102c24;
    --cream: #f5f0df;
    --font-sans: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-serif: Georgia, 'Noto Serif SC', 'Songti SC', serif;
    color-scheme: light;
}
html[data-lang="en"] [lang="zh"], html[data-lang="zh"] [lang="en"] { display: none !important; }
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { font-family: var(--font-sans); background: var(--bg); color: var(--text); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }
a, button { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible { outline: 2px solid currentColor; outline-offset: 6px; }
.container { width: min(100%, 1440px); margin: 0 auto; padding: 0 80px; }
h1, h2 { font-family: var(--font-serif); font-weight: 500; letter-spacing: -.045em; line-height: 1.08; }
h2 { font-size: clamp(2rem, 3.6vw, 3.25rem); }
h3 { font-weight: 600; font-size: 1.15rem; line-height: 1.35; }
mark { background: var(--mark); color: inherit; padding: 0 2px; }
section { padding: 104px 0; }
.skip-link { position: fixed; left: 16px; top: -100px; padding: 12px 20px; background: var(--cream); color: var(--forest); z-index: 20; }
.skip-link:focus { top: 16px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 24px; border: 1px solid transparent; border-radius: 100px; font-size: .95rem; line-height: 1.4; font-weight: 600; cursor: pointer; transition: background .2s, color .2s, transform .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--text); color: var(--bg); }
.btn-primary:hover { background: #39604b; color: var(--cream); }
.btn-ghost { background: transparent; border-color: #f5f0df55; color: inherit; min-width: 58px; padding: 8px 16px; font-weight: 400; }
.btn-ghost:hover { background: #f5f0df12; }
.text-link { display: inline-flex; gap: 14px; align-items: center; font-size: 1.1rem; min-height: 48px; }
.text-link > span[lang] { text-decoration: underline; text-underline-offset: 8px; text-decoration-thickness: 1px; }
.text-link:hover { color: #d5e1be; }
.material-symbols-rounded { font-size: 28px; font-weight: 400; line-height: 1; }
.site-header { position: relative; z-index: 2; background: var(--forest); color: var(--cream); }
.header-content { min-height: 112px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: inline-flex; align-items: center; gap: 14px; font-family: var(--font-serif); font-size: 2rem; line-height: 1; letter-spacing: -.035em; }
.logo img { width: 46px; height: 46px; object-fit: contain; }
.site-header nav { display: flex; align-items: center; gap: 32px; font-size: .9rem; }
.nav-link { padding: 12px 0; }
.nav-link:hover { text-decoration: underline; text-underline-offset: 7px; }
.forest-intro { position: relative; isolation: isolate; background: var(--forest); color: var(--cream); }
.hero-scene { position: absolute; z-index: -1; width: 100%; height: 100%; inset: 0; object-fit: cover; object-position: center; }
.forest-intro .site-header { background: transparent; }
.hero { padding: 0; }
.hero-content { min-height: 712px; display: flex; align-items: center; padding-top: 28px; padding-bottom: 72px; }
.hero-copy { width: 58%; max-width: 720px; }
.eyebrow { font-family: var(--font-serif); font-size: 1.2rem; letter-spacing: .055em; margin-bottom: 32px; }
.hero h1 { font-size: clamp(4rem, 7.4vw, 6.7rem); margin-bottom: 32px; letter-spacing: -.05em; line-height: 1.02; }
html[data-lang="zh"] .hero h1 { font-size: clamp(3.2rem, 6.2vw, 5.6rem); line-height: 1.2; letter-spacing: -.04em; }
.hero .lead { font-size: clamp(1rem, 1.55vw, 1.375rem); line-height: 1.65; color: #f5f0dfeb; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 24px 32px; align-items: center; margin-top: 48px; }
.hero .btn-primary { background: var(--cream); color: var(--forest); padding: 20px 36px; font-size: 1.2rem; }
.hero .btn-primary:hover { background: #e2e8d0; }
.hero-note { font-size: 1rem; margin-top: 20px; color: #f5f0dfcf; }
.growth-strip { padding: 64px 0; border-bottom: 1px solid var(--border); }
.growth-content { display: grid; grid-template-columns: 1.18fr 1fr 1fr; gap: 40px; align-items: center; }
.growth-content h2 { font-size: clamp(2rem, 3.9vw, 3.5rem); line-height: 1.12; }
.growth-item { display: flex; gap: 20px; border-left: 1px solid var(--border); padding-left: 32px; }
.growth-item .material-symbols-rounded { flex-shrink: 0; font-size: 40px; color: var(--accent); }
.growth-item h3 { font-family: var(--font-serif); font-size: 1.6rem; font-weight: 500; margin-bottom: 12px; }
.growth-item p { color: var(--dim); font-size: 1rem; line-height: 1.65; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head h2 { margin-bottom: 20px; }
.section-head p { color: var(--dim); font-size: 1.05rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px 64px; }
.feature-card { padding-top: 24px; border-top: 1px solid var(--border); }
.feature-icon { color: var(--accent); margin-bottom: 20px; }
.feature-card h3 { margin-bottom: 12px; }
.feature-card p { color: var(--dim); font-size: .95rem; }
.steps { background: var(--surface-2); }
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 64px; counter-reset: step; }
.step { counter-increment: step; }
.step::before { content: counter(step, decimal-leading-zero); display: block; color: var(--accent); font-family: var(--font-serif); font-size: 2rem; margin-bottom: 24px; }
.step h3 { margin-bottom: 12px; }
.step p { color: var(--dim); font-size: .95rem; }
.quote { text-align: center; }
.quote blockquote { font-family: var(--font-serif); font-weight: 500; letter-spacing: -.025em; font-size: clamp(1.8rem, 3.6vw, 3.1rem); line-height: 1.4; max-width: 960px; margin: auto; }
.cta { padding: 80px 0; background: var(--forest); color: var(--cream); text-align: center; }
.cta-card { max-width: 760px; margin: auto; }
.cta h2 { margin-bottom: 24px; }
.cta p { color: #f5f0dfbd; max-width: 580px; margin: 0 auto 32px; }
.cta .btn-primary { background: var(--cream); color: var(--forest); }
.cta .btn-primary:hover { background: #e2e8d0; }
footer { padding: 48px 0 32px; background: var(--forest); color: #f5f0dfc2; border-top: 1px solid #f5f0df24; font-size: .85rem; }
.footer-content { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 32px; }
footer .logo { font-size: 1.45rem; color: var(--cream); }
.footer-links { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 24px; }
.footer-links a, .footer-links button { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 0; }
.footer-links a:hover, .footer-links button:hover { color: var(--cream); text-decoration: underline; text-underline-offset: 5px; }
.footer-links button { border: 0; background: none; color: inherit; font: inherit; cursor: pointer; }
.copyright { width: 100%; color: #f5f0df90; font-size: .75rem; }
.policy { padding: 64px 0 96px; }
.policy-container { max-width: 920px; }
.policy h1 { font-size: clamp(2.4rem, 4vw, 3.4rem); margin-bottom: 24px; }
.policy-meta { color: var(--dim); padding-bottom: 24px; margin-bottom: 32px; border-bottom: 1px solid var(--border); }
.policy-section { margin-bottom: 32px; }
.policy-section h2 { font-family: var(--font-sans); font-size: 1.2rem; font-weight: 600; letter-spacing: 0; margin-bottom: 12px; }
.policy-section p, .policy-section li { color: var(--dim); margin-bottom: 12px; }
.policy-section ul { padding-left: 24px; }
.policy-section strong { color: var(--text); }
.policy-section a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.policy > .container > img { filter: brightness(.3) sepia(1) hue-rotate(85deg) saturate(1.4); }
@media (prefers-color-scheme: dark) {
    :root { --bg: #142d25; --surface: #1b372c; --surface-2: #1b3429; --text: #f0eddf; --dim: #b9c3b4; --border: #3b5142; --accent: #b6caa0; --mark: #3d5736; color-scheme: dark; }
    .btn-primary { background: var(--cream); color: var(--forest); }
    .policy > .container > img { filter: none; }
}
@media (min-width: 1600px) {
    .forest-intro { max-height: 1000px; }
    .hero-content { min-height: 780px; }
    /* Keep wide-image cropping below the navigation instead of lifting the phone into it. */
    .hero-scene { object-position: center top; }
}
@media (max-width: 1150px) {
    .container { padding: 0 48px; }
    .hero-content { padding-top: 36px; padding-bottom: 72px; min-height: 680px; }
    .hero-copy { width: 58%; }
    .hero-actions { gap: 12px 24px; margin-top: 32px; }
    .hero .btn-primary { padding: 16px 24px; font-size: .9rem; }
    .growth-content { gap: 24px; }
    .growth-item { padding-left: 24px; gap: 12px; }
    .growth-item .material-symbols-rounded { font-size: 28px; }
    .feature-grid, .step-grid { gap: 32px; }
}
@media (max-width: 1000px) {
    .container { padding-left: 24px; padding-right: 24px; }
    .header-content { min-height: 88px; }
    .logo { font-size: 1.65rem; gap: 8px; }
    .logo img { width: 38px; height: 38px; }
    .site-header nav { gap: 16px; }
    .hero-content { min-height: 0; padding-top: 44px; padding-bottom: 0; }
    .hero-copy { width: 100%; max-width: 540px; }
    .eyebrow { font-size: .95rem; margin-bottom: 24px; }
    .hero h1 { font-size: clamp(2.75rem, 14vw, 5.1rem); margin-bottom: 24px; }
    html[data-lang="zh"] .hero h1 { font-size: clamp(2.8rem, 9.4vw, 4.5rem); }
    .hero .lead { font-size: 1rem; }
    .hero .lead br { display: none; }
    .hero-actions { gap: 12px 24px; margin-top: 28px; }
    .hero .btn-primary { font-size: .9rem; padding: 16px 22px; }
    .hero-note { font-size: .85rem; margin-top: 16px; }
    .hero-scene { position: relative; inset: auto; z-index: 0; height: 440px; width: 100%; object-fit: cover; object-position: right bottom; margin-top: 24px; }
    .forest-intro { display: flex; flex-direction: column; }
    .forest-intro .site-header { order: -2; }
    .hero { order: -1; }
    section { padding: 64px 0; }
    .growth-strip { padding: 48px 0; }
    .growth-content { grid-template-columns: 1fr; gap: 32px; }
    .growth-content h2 { font-size: 2.35rem; margin-bottom: 4px; }
    .growth-item { border-left: 0; border-top: 1px solid var(--border); padding: 24px 0 0; gap: 20px; }
    .growth-item .material-symbols-rounded { font-size: 32px; }
    .growth-item h3 { font-size: 1.5rem; margin-bottom: 8px; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 24px; }
    .step-grid { grid-template-columns: 1fr; gap: 32px; }
    .step::before { margin-bottom: 12px; }
    .section-head { margin-bottom: 32px; }
    .quote blockquote { font-size: 1.95rem; }
    .footer-content { align-items: flex-start; flex-direction: column; gap: 24px; }
    .footer-links { gap: 8px 24px; }
    .policy { padding: 48px 0 64px; }
}
@media (min-width: 600px) and (max-width: 1000px) {
    .hero-copy { max-width: 700px; }
    .hero-scene { height: 560px; }
}
@media (max-width: 600px) {
    .site-header nav .nav-link { display: none; }
}
@media (max-width: 420px) {
    .hero .text-link { font-size: .9rem; }
    .hero-scene { height: 390px; }
    .feature-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .btn { transition: none; }
    .btn:hover { transform: none; }
}