:root {
    --green: #2F7D5B;
    --green-dark: #1F2A26;
    --green-soft: #EEF3EF;
    --pink: #D96C8A;
    --pink-soft: #F7E9ED;
    --orange: #E58A3A;
    --orange-soft: #FBF0E5;
    --bg: #F7F8F5;
    --surface: #FFFFFF;
    --text: #28312D;
    --muted: #6B756F;
    --border: #D9E2DC;
    --shadow: 0 18px 50px rgba(31, 42, 38, .08);
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 30px;
    --content: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--text);
    background: var(--bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--green); }
button, input, textarea, select { font: inherit; }
button { color: inherit; }
:focus-visible { outline: 3px solid rgba(229,138,58,.45); outline-offset: 3px; }

.skip-link {
    position: fixed;
    left: 12px;
    top: 12px;
    z-index: 1000;
    padding: 10px 14px;
    background: var(--green-dark);
    color: #fff;
    border-radius: 8px;
    transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(247,248,245,.94);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(217,226,220,.85);
}
.site-header__inner {
    width: min(var(--content), calc(100% - 36px));
    min-height: 76px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 11px; min-width: max-content; }
.brand img { width: 46px; height: 46px; object-fit: contain; border-radius: 12px; }
.brand span { display: flex; flex-direction: column; line-height: 1.15; }
.brand strong { font-size: 18px; letter-spacing: .02em; color: var(--green-dark); }
.brand small { margin-top: 5px; color: var(--muted); font-size: 12px; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
    padding: 9px 13px;
    border-radius: 999px;
    font-size: 14px;
    color: #46504B;
    transition: background .2s ease, color .2s ease;
}
.site-nav a:hover, .site-nav a.is-active { background: var(--green-soft); color: var(--green); }
.nav-toggle { display: none; border: 0; background: var(--green-soft); border-radius: 10px; padding: 8px 12px; cursor: pointer; }

.section-shell { width: min(var(--content), calc(100% - 36px)); margin: 0 auto; }
.home-lead {
    display: grid;
    grid-template-columns: 1.04fr .96fr;
    gap: 52px;
    align-items: center;
    padding-top: 54px;
    padding-bottom: 54px;
}
.lead-copy { max-width: 650px; }
.eyebrow {
    margin: 0 0 10px;
    color: var(--green);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}
h1, h2, h3 { color: var(--green-dark); line-height: 1.25; letter-spacing: -.025em; }
h1 { margin: 0; font-size: clamp(34px, 5vw, 62px); }
h2 { margin: 0; font-size: clamp(25px, 3vw, 36px); }
h3 { margin: 0; font-size: 20px; }
.lead-text { margin: 22px 0 0; max-width: 600px; color: #4C5651; font-size: 18px; }
.lead-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 18px;
    border-radius: 12px;
    font-weight: 750;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button--primary { color: #fff; background: var(--green); box-shadow: 0 10px 22px rgba(47,125,91,.2); }
.button--primary:hover { color: #fff; background: #276d4e; }
.button--ghost { border: 1px solid var(--border); background: rgba(255,255,255,.6); color: var(--green-dark); }
.lead-visual { margin: 0; position: relative; }
.lead-visual img { width: 100%; aspect-ratio: 1.35; object-fit: cover; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.lead-visual figcaption {
    position: absolute;
    left: 22px;
    right: 22px;
    bottom: 20px;
    padding: 13px 16px;
    color: #fff;
    background: rgba(31,42,38,.82);
    border-radius: 12px;
    font-size: 13px;
    backdrop-filter: blur(10px);
}

.content-band { padding-top: 68px; padding-bottom: 70px; border-top: 1px solid var(--border); }
.section-heading { margin-bottom: 24px; }
.section-heading--split { display: grid; grid-template-columns: 1fr 400px; gap: 32px; align-items: end; }
.section-heading--split > p { margin: 0; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: 1.35fr .65fr .65fr; gap: 18px; align-items: stretch; }
.feature-main {
    grid-row: span 2;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow);
}
.feature-main > img { width: 100%; aspect-ratio: 1.63; object-fit: cover; }
.feature-main__body { padding: 24px; }
.feature-main h3 { margin-top: 13px; font-size: 26px; }
.feature-main p { color: var(--muted); margin: 12px 0 16px; }
.chip {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 3px 9px;
    border-radius: 999px;
    background: var(--green-soft);
    color: var(--green);
    font-size: 12px;
    font-weight: 800;
}
.chip--accent { background: var(--orange-soft); color: #9B551C; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--green); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }

.story-card {
    min-width: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
}
.story-card--compact { padding: 18px; }
.story-card--compact h3 { margin-top: 10px; font-size: 17px; }
.story-card--compact p { margin: 8px 0 0; font-size: 14px; color: var(--muted); line-height: 1.65; }
.story-card__meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 12px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 7px; padding: 0; margin: 14px 0 0; list-style: none; }
.tag-row li { padding: 3px 8px; background: #F5F6F3; border-radius: 7px; color: #758078; font-size: 11px; }

.stream-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 50px; padding-top: 72px; padding-bottom: 80px; }
.story-stream { display: grid; gap: 12px; }
.story-card--row { padding: 20px 22px; }
.story-card--row h3 { margin-top: 9px; font-size: 20px; }
.story-card--row p { margin: 9px 0 0; color: var(--muted); }
.story-card--row:hover { border-color: #BFD2C6; box-shadow: 0 12px 34px rgba(31,42,38,.05); }
.sticky-panel { position: sticky; top: 96px; padding: 22px; background: var(--green-soft); border: 1px solid #D5E3DA; border-radius: var(--radius-md); }
.sticky-panel h2 { font-size: 23px; margin-bottom: 16px; }
.topic-list { padding: 0; margin: 0; list-style: none; display: grid; gap: 9px; }
.topic-list a { display: block; padding: 12px 0; border-top: 1px solid rgba(47,125,91,.14); }
.topic-list strong { display: block; font-size: 15px; }
.topic-list span { display: block; margin-top: 2px; color: var(--muted); font-size: 12px; line-height: 1.55; }

.split-callout {
    display: grid;
    grid-template-columns: 1fr .82fr;
    gap: 48px;
    align-items: center;
    padding: 44px;
    margin-bottom: 74px;
    background: var(--pink-soft);
    border: 1px solid #EED5DD;
    border-radius: var(--radius-lg);
}
.split-callout--reverse { grid-template-columns: .95fr 1fr; background: var(--green-soft); }
.split-callout p:not(.eyebrow) { color: #5C5558; margin: 16px 0 22px; }
.split-callout img { width: 100%; aspect-ratio: 1.48; object-fit: cover; border-radius: 20px; }

.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; padding-bottom: 82px; }
.soft-card { padding: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); }
.soft-card img { width: 100%; aspect-ratio: 1.7; object-fit: cover; border-radius: 13px; margin-bottom: 18px; }
.soft-card h2 { font-size: 22px; }
.soft-card p { color: var(--muted); }

.faq-block { padding-bottom: 90px; }
.faq-list { display: grid; gap: 10px; max-width: 900px; }
.faq-list details { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 0 18px; }
.faq-list summary { padding: 16px 0; cursor: pointer; font-weight: 800; color: var(--green-dark); }
.faq-list details p { margin: 0; padding: 0 0 18px; color: var(--muted); }

.breadcrumb { width: min(var(--content), calc(100% - 36px)); margin: 18px auto 0; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; color: var(--muted); font-size: 13px; }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #ABB3AE; }
.page-hero { display: grid; grid-template-columns: 1fr .78fr; gap: 48px; align-items: center; padding: 58px 42px; margin-top: 28px; border-radius: var(--radius-lg); }
.page-hero h1 { font-size: clamp(32px, 4.5vw, 52px); }
.page-hero p:not(.eyebrow) { margin: 18px 0 0; max-width: 650px; }
.page-hero img { width: 100%; aspect-ratio: 1.5; object-fit: cover; border-radius: 20px; }
.page-hero--pink { background: var(--pink-soft); border: 1px solid #EFD6DE; }
.page-hero--green { background: var(--green-soft); border: 1px solid #D6E2D9; }
.page-hero--orange { background: var(--orange-soft); border: 1px solid #F0D8BF; }
.page-hero--dark { background: var(--green-dark); border: 1px solid #263731; }
.page-hero--dark h1, .page-hero--dark p { color: #F5F7F5; }
.page-hero--dark .eyebrow { color: #F0A763; }

.evidence-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; padding-top: 28px; }
.evidence-strip > div { position: relative; padding: 22px 22px 18px 64px; background: var(--surface); border: 1px solid var(--border); border-radius: 15px; }
.evidence-strip span { position: absolute; left: 20px; top: 20px; color: var(--pink); font-weight: 900; }
.evidence-strip strong { display: block; font-size: 18px; }
.evidence-strip p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }
.accent-panel { background: var(--pink-soft); border-color: #EDD6DD; }
.plain-list { padding-left: 20px; color: #5E6160; }
.plain-list li { margin: 9px 0; }
.editorial-note { display: grid; grid-template-columns: .8fr 1fr; gap: 40px; align-items: center; padding: 34px; margin-bottom: 82px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); }
.editorial-note img { width: 100%; aspect-ratio: 1.55; object-fit: cover; border-radius: 18px; }
.editorial-note p:not(.eyebrow) { color: var(--muted); }

.material-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; padding-top: 26px; padding-bottom: 74px; }
.material-grid article { padding: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: 17px; }
.material-grid h2 { font-size: 22px; }
.material-grid p { margin-bottom: 0; color: var(--muted); }
.story-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; padding-bottom: 76px; }
.story-grid .story-card { padding: 22px; }
.story-grid .story-card h3 { margin-top: 11px; }
.story-grid .story-card p { color: var(--muted); }

.community-rules { padding-top: 58px; padding-bottom: 66px; }
.community-rules h2 { max-width: 760px; }
.community-rules ol { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; padding: 0; margin: 26px 0 0; list-style: none; counter-reset: card; }
.community-rules li { position: relative; padding: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: 17px; }
.community-rules strong { display: block; margin-bottom: 8px; font-size: 17px; }
.community-rules span { color: var(--muted); font-size: 14px; }

.app-points { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; padding-top: 30px; padding-bottom: 70px; }
.app-points > div { padding: 22px; background: #FFFDFC; border: 1px solid #ECDCCB; border-radius: 16px; }
.app-points strong { font-size: 17px; color: var(--green-dark); }
.app-points p { margin-bottom: 0; color: var(--muted); font-size: 14px; }

.article { padding-top: 42px; padding-bottom: 90px; }
.article-head { max-width: 920px; margin: 0 auto 44px; text-align: center; }
.article-head h1 { margin-top: 16px; font-size: clamp(34px, 5vw, 56px); }
.article-deck { max-width: 760px; margin: 20px auto 0; color: var(--muted); font-size: 18px; }
.article-meta { display: flex; justify-content: center; gap: 8px; margin-top: 16px; color: #85908A; font-size: 13px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 760px) 250px; justify-content: center; gap: 58px; }
.article-body { font-size: 17px; }
.lead-paragraph { padding: 22px 24px; margin: 0 0 34px; background: var(--green-soft); border-left: 4px solid var(--green); border-radius: 0 12px 12px 0; color: #39463F; }
.article-body section { margin: 36px 0; }
.article-body section h2 { margin-bottom: 12px; font-size: 26px; }
.article-body section p { color: #48534E; }
.article-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding-top: 22px; border-top: 1px solid var(--border); }
.article-tags strong { margin-right: 4px; font-size: 13px; }
.article-tags span { padding: 4px 9px; background: var(--green-soft); border-radius: 999px; color: var(--green); font-size: 12px; }
.article-aside .sticky-panel { display: grid; gap: 8px; }
.article-aside .sticky-panel h2 { margin-bottom: 5px; }
.article-aside .sticky-panel a { padding: 8px 0; border-top: 1px solid rgba(47,125,91,.15); font-size: 14px; font-weight: 700; }

.not-found { min-height: 62vh; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding-top: 70px; padding-bottom: 70px; }
.not-found h1 { font-size: clamp(36px, 6vw, 66px); }
.not-found > p:not(.eyebrow) { max-width: 640px; color: var(--muted); font-size: 18px; }
.topic-jumps { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.topic-jumps a { padding: 9px 13px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; font-weight: 700; }

.site-footer { padding: 54px 0 26px; background: var(--green-dark); color: #DCE4DF; }
.site-footer__grid { width: min(var(--content), calc(100% - 36px)); margin: 0 auto; display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 45px; }
.site-footer strong { color: #fff; font-size: 20px; }
.site-footer p { color: #AFBBB4; font-size: 14px; }
.site-footer nav { display: grid; align-content: start; gap: 8px; }
.site-footer nav a { color: #DCE4DF; font-size: 14px; }
.site-footer nav a:hover { color: #F0A763; }
.copyright { width: min(var(--content), calc(100% - 36px)); margin: 32px auto 0 !important; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); font-size: 12px !important; }

@media (max-width: 1020px) {
    .feature-grid { grid-template-columns: 1.2fr .8fr; }
    .feature-main { grid-row: span 4; }
    .stream-layout { grid-template-columns: minmax(0,1fr) 270px; gap: 28px; }
    .page-hero { grid-template-columns: 1fr .65fr; gap: 30px; }
    .cards-3 { grid-template-columns: 1fr 1fr; }
    .cards-3 > :last-child { grid-column: 1 / -1; }
    .article-layout { grid-template-columns: minmax(0,680px) 220px; gap: 34px; }
}

@media (max-width: 820px) {
    .home-lead { grid-template-columns: 1fr; gap: 30px; padding-top: 36px; }
    .lead-copy { max-width: none; }
    .section-heading--split { grid-template-columns: 1fr; gap: 12px; }
    .stream-layout { grid-template-columns: 1fr; }
    .sticky-panel { position: static; }
    .split-callout, .split-callout--reverse { grid-template-columns: 1fr; padding: 28px; }
    .page-hero { grid-template-columns: 1fr; padding: 36px 28px; }
    .page-hero img { max-height: 360px; }
    .editorial-note { grid-template-columns: 1fr; }
    .article-layout { grid-template-columns: 1fr; }
    .article-aside { display: none; }
    .site-footer__grid { grid-template-columns: 1fr 1fr; }
    .footer-note { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
    .site-header__inner { min-height: 68px; }
    .nav-toggle { display: inline-flex; }
    .site-nav {
        position: fixed;
        inset: 68px 0 auto;
        display: none;
        padding: 14px 18px 22px;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 18px 30px rgba(31,42,38,.08);
    }
    .site-nav.is-open { display: grid; gap: 6px; }
    .site-nav a { border-radius: 10px; padding: 11px 12px; }
    body.menu-open { overflow: hidden; }
    .feature-grid { grid-template-columns: 1fr; }
    .feature-main { grid-row: auto; }
    .feature-main h3 { font-size: 22px; }
    .evidence-strip, .material-grid, .community-rules ol, .app-points { grid-template-columns: 1fr; }
    .story-grid { grid-template-columns: 1fr; }
    .cards-3 { grid-template-columns: 1fr; }
    .cards-3 > :last-child { grid-column: auto; }
    .site-footer__grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-note { grid-column: auto; }
}

@media (max-width: 560px) {
    .section-shell, .site-header__inner, .breadcrumb, .site-footer__grid, .copyright { width: min(100% - 24px, var(--content)); }
    h1 { font-size: 36px; }
    .home-lead { padding-bottom: 42px; }
    .lead-text { font-size: 16px; }
    .lead-actions { flex-direction: column; align-items: stretch; }
    .button { width: 100%; }
    .lead-visual figcaption { position: static; margin-top: 10px; background: transparent; color: var(--muted); padding: 0 3px; }
    .content-band { padding-top: 48px; padding-bottom: 50px; }
    .stream-layout { padding-top: 48px; padding-bottom: 56px; }
    .story-card--row { padding: 17px; }
    .story-card--row h3 { font-size: 18px; }
    .split-callout { margin-bottom: 56px; padding: 22px; }
    .page-hero { padding: 30px 20px; margin-top: 18px; }
    .page-hero h1 { font-size: 34px; }
    .editorial-note { padding: 20px; margin-bottom: 56px; }
    .article { padding-top: 28px; }
    .article-head { text-align: left; margin-bottom: 30px; }
    .article-meta { justify-content: flex-start; }
    .article-deck { font-size: 16px; }
    .article-body { font-size: 16px; }
    .lead-paragraph { padding: 18px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}