:root {
    --ink: #1f2d2a;
    --muted: #62706b;
    --green: #1f5a47;
    --green-dark: #173f35;
    --green-soft: #e5eee7;
    --cream: #f7f1e6;
    --paper: #fffaf0;
    --line: rgba(31, 45, 42, 0.12);
    --shadow: 0 24px 60px rgba(31, 45, 42, 0.12);
    --radius: 26px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.75;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }

.container {
    width: min(1160px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(255, 250, 240, 0.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}

.header-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    letter-spacing: 0.03em;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: var(--cream);
    background: radial-gradient(circle at 35% 30%, #7ea58f, var(--green-dark));
    box-shadow: 0 12px 28px rgba(31, 90, 71, 0.22);
}

.brand-text { font-size: 20px; }

.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
}

.main-nav a {
    padding: 9px 13px;
    border-radius: 999px;
    color: var(--muted);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--green-dark);
    background: var(--green-soft);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: transparent;
    padding: 10px;
}

.nav-toggle span {
    display: block;
    height: 2px;
    margin: 5px 0;
    background: var(--green-dark);
}

.hero {
    padding: 82px 0 64px;
    overflow: hidden;
}

.hero-home {
    background:
        radial-gradient(circle at 80% 12%, rgba(31, 90, 71, 0.18), transparent 32%),
        linear-gradient(180deg, #fffaf0 0%, #f2eadc 100%);
}

.hero-grid,
.page-hero-grid,
.topic-layout,
.split,
.contact-grid,
.learning-strip {
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 56px;
    align-items: center;
}

.hero-copy h1,
.page-hero h1 {
    margin: 0;
    font-size: clamp(38px, 6vw, 70px);
    line-height: 1.08;
    letter-spacing: -0.06em;
    color: var(--green-dark);
}

.hero-lead,
.page-hero p,
.section-head p,
.topic-copy p,
.manifesto p {
    color: var(--muted);
    font-size: 18px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin: 34px 0 24px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 22px;
    border-radius: 999px;
    font-weight: 700;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--green);
    color: #fffaf0;
    box-shadow: 0 14px 34px rgba(31, 90, 71, 0.22);
}

.btn-secondary {
    background: transparent;
    color: var(--green-dark);
    border-color: rgba(31, 90, 71, 0.24);
}

.domain-card,
.address-panel {
    display: grid;
    gap: 4px;
    max-width: 520px;
    padding: 18px 22px;
    border-radius: 20px;
    background: rgba(255, 250, 240, 0.78);
    border: 1px solid var(--line);
}

.domain-card span,
.address-panel span {
    color: var(--muted);
    font-size: 14px;
}

.domain-card strong,
.address-panel strong {
    color: var(--green-dark);
    overflow-wrap: anywhere;
}

.hero-media,
.page-hero img,
.topic-map,
.image-card {
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.46);
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.62);
    overflow: hidden;
}

.section { padding: 80px 0; }
.no-top { padding-top: 0; }

.soft-section {
    background: linear-gradient(180deg, rgba(229, 238, 231, 0.72), rgba(247, 241, 230, 0.66));
}

.intro-band {
    padding: 44px 0;
    background: var(--green-dark);
    color: #fffaf0;
}

.intro-band p { color: rgba(255, 250, 240, 0.76); }

.eyebrow {
    margin: 0 0 12px;
    color: var(--green);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.intro-band .eyebrow { color: #cfe5d7; }

.section-head {
    max-width: 760px;
    margin: 0 0 34px;
}

.section-head h2,
.split h2,
.topic-copy h2,
.learning-strip h2,
.manifesto h2,
.contact-info h2 {
    margin: 0;
    font-size: clamp(30px, 4vw, 48px);
    line-height: 1.16;
    letter-spacing: -0.04em;
    color: var(--green-dark);
}

.section-head.compact { margin-bottom: 18px; }

.category-grid,
.video-grid,
.values-grid,
.plan-grid,
.recommendation-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

.feature-card,
.video-card,
.recommend-card,
.values-grid article,
.plan-card,
.topic-card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 250, 240, 0.86);
    box-shadow: 0 18px 50px rgba(31, 45, 42, 0.08);
    overflow: hidden;
}

.feature-card { padding: 22px; }
.feature-card img { margin-bottom: 18px; border-radius: 18px; background: var(--green-soft); }
.feature-card h3,
.video-card h2,
.video-card h3,
.recommend-card h3,
.values-grid h2,
.plan-card h2,
.topic-card h2,
.timeline-list h2 {
    margin: 8px 0 8px;
    color: var(--green-dark);
    line-height: 1.28;
}

.feature-card p,
.video-card p,
.recommend-card p,
.values-grid p,
.plan-card p,
.topic-card p,
.timeline-list p,
.form-note {
    color: var(--muted);
    margin: 0;
}

.tag {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 10px;
    border-radius: 999px;
    background: var(--green-soft);
    color: var(--green-dark);
    font-size: 13px;
    font-weight: 700;
}

.check-list {
    padding: 0;
    margin: 24px 0 0;
    list-style: none;
    display: grid;
    gap: 12px;
}

.check-list li {
    position: relative;
    padding-left: 28px;
    color: var(--ink);
}

.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.62em;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--green);
}

.video-grid { grid-template-columns: repeat(3, 1fr); }
.video-card img { width: 100%; background: var(--green-soft); }
.video-body { padding: 22px; }
.video-body a { color: var(--green); font-weight: 800; display: inline-block; margin-top: 12px; }

.recommendation-grid { grid-template-columns: 1.4fr repeat(3, 1fr); align-items: stretch; }
.recommend-card { padding: 24px; }

.learning-strip {
    grid-template-columns: 1fr auto;
    padding: 34px;
    border-radius: var(--radius);
    background: var(--green-dark);
    color: #fffaf0;
}
.learning-strip h2 { color: #fffaf0; }
.learning-strip p { color: rgba(255, 250, 240, 0.76); }
.learning-strip .eyebrow { color: #cfe5d7; }
.learning-strip .btn-primary { background: #fffaf0; color: var(--green-dark); }

.faq-list { display: grid; gap: 14px; }
.faq-list details {
    border: 1px solid var(--line);
    border-radius: 20px;
    background: rgba(255, 250, 240, 0.9);
    padding: 18px 22px;
}
.faq-list summary { cursor: pointer; font-weight: 800; color: var(--green-dark); }
.faq-list p { color: var(--muted); margin-bottom: 0; }

.contact-cta { padding-top: 26px; }
.page-hero { padding: 70px 0; background: linear-gradient(180deg, #fffaf0 0%, #f2eadc 100%); }

.split.reverse { grid-template-columns: 0.82fr 1.18fr; }
.pill-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.pill-row span { padding: 8px 12px; border-radius: 999px; background: var(--green-soft); color: var(--green-dark); font-weight: 700; }

.values-grid { grid-template-columns: repeat(3, 1fr); }
.values-grid article { padding: 28px; }
.manifesto { max-width: 860px; }

.filter-section { padding-bottom: 28px; }
.filter-pills { display: flex; flex-wrap: wrap; gap: 12px; }
.filter-btn {
    border: 1px solid var(--line);
    background: var(--paper);
    color: var(--green-dark);
    padding: 10px 16px;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 700;
}
.filter-btn.active { background: var(--green); color: #fffaf0; }
.documentary-list .video-card.is-hidden { display: none; }

.topic-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}
.topic-card { padding: 26px; min-height: 240px; }
.topic-card.large { grid-column: span 2; }
.topic-card.image-card { padding: 0; }
.topic-card.image-card img { width: 100%; height: 100%; object-fit: cover; }

.timeline-list { display: grid; gap: 18px; max-width: 940px; }
.timeline-list article {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 24px;
    padding: 28px;
    border-radius: var(--radius);
    background: rgba(255, 250, 240, 0.9);
    border: 1px solid var(--line);
}
.timeline-list span {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--green);
    color: #fffaf0;
    font-weight: 900;
}
.plan-grid { grid-template-columns: repeat(3, 1fr); }
.plan-card { padding: 28px; }
.plan-card ul { padding-left: 20px; margin-bottom: 0; color: var(--muted); }

.contact-grid { grid-template-columns: 0.86fr 1.14fr; align-items: start; }
.address-panel.wide { max-width: none; margin-top: 22px; }
.contact-form {
    display: grid;
    gap: 18px;
    padding: 30px;
    border-radius: var(--radius);
    background: rgba(255, 250, 240, 0.92);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.contact-form label { display: grid; gap: 8px; font-weight: 800; color: var(--green-dark); }
.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 13px 14px;
    background: #fffdf7;
    color: var(--ink);
    font: inherit;
}

.site-footer {
    padding: 56px 0;
    background: #142f2a;
    color: rgba(255, 250, 240, 0.78);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 0.8fr 0.9fr;
    gap: 34px;
}
.footer-brand { color: #fffaf0; font-size: 22px; font-weight: 900; }
.site-footer h2 { color: #fffaf0; font-size: 18px; margin: 0 0 10px; }
.site-footer a { display: block; margin: 6px 0; }
.site-footer p { margin: 8px 0 0; }

@media (max-width: 980px) {
    .hero-grid,
    .page-hero-grid,
    .topic-layout,
    .split,
    .split.reverse,
    .contact-grid,
    .learning-strip { grid-template-columns: 1fr; }
    .category-grid,
    .recommendation-grid,
    .values-grid,
    .plan-grid,
    .topic-cards { grid-template-columns: repeat(2, 1fr); }
    .video-grid { grid-template-columns: repeat(2, 1fr); }
    .recommendation-grid .section-head { grid-column: 1 / -1; }
    .topic-card.large { grid-column: span 1; }
}

@media (max-width: 760px) {
    .container { width: min(100% - 28px, 1160px); }
    .header-inner { min-height: 68px; }
    .nav-toggle { display: block; }
    .main-nav {
        position: absolute;
        left: 14px;
        right: 14px;
        top: 74px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 14px;
        background: var(--paper);
        border: 1px solid var(--line);
        border-radius: 20px;
        box-shadow: var(--shadow);
    }
    .main-nav.is-open { display: flex; }
    .main-nav a { padding: 12px 14px; }
    .hero { padding: 54px 0 42px; }
    .page-hero { padding: 48px 0; }
    .section { padding: 54px 0; }
    .category-grid,
    .video-grid,
    .recommendation-grid,
    .values-grid,
    .plan-grid,
    .topic-cards,
    .footer-grid { grid-template-columns: 1fr; }
    .timeline-list article { grid-template-columns: 1fr; }
    .learning-strip { padding: 24px; }
    .hero-actions { align-items: stretch; }
    .btn { width: 100%; }
}