:root {
    --green-900: #10261f;
    --green-800: #17372e;
    --green-700: #235044;
    --green-500: #4e806e;
    --sand-50: #fbf7ef;
    --sand-100: #f1e7d6;
    --sand-200: #e2d0b4;
    --gray-900: #1c2421;
    --gray-700: #4c5752;
    --gray-100: #f5f1e8;
    --line: rgba(16, 38, 31, .14);
    --shadow: 0 24px 60px rgba(15, 35, 29, .13);
    --radius: 26px;
    --max: 1180px;
}

* { 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(--gray-900);
    background: var(--sand-50);
    line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
p { margin: 0; color: var(--gray-700); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    min-height: 76px;
    padding: 16px clamp(18px, 4vw, 52px);
    background: rgba(251, 247, 239, .9);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; }
.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 46px;
    height: 46px;
    border-radius: 16px;
    color: var(--sand-50);
    background: linear-gradient(135deg, var(--green-900), var(--green-500));
    box-shadow: 0 10px 24px rgba(16, 38, 31, .2);
    letter-spacing: -.03em;
}
.brand-text { color: var(--green-900); letter-spacing: .04em; }
.site-nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
.site-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    font-size: 15px;
    color: var(--gray-700);
}
.site-nav a:hover,
.site-nav a.active { background: var(--green-900); color: var(--sand-50); }
.nav-toggle { display: none; border: 0; background: var(--green-900); color: var(--sand-50); border-radius: 12px; padding: 10px 12px; font-size: 20px; }

main { overflow: hidden; }
.section { max-width: var(--max); margin: 0 auto; padding: clamp(54px, 7vw, 94px) clamp(18px, 4vw, 28px); }
.section.narrow { max-width: 940px; }
.kicker { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 16px; color: var(--green-700); font-weight: 700; letter-spacing: .08em; }
.kicker::before { content: ""; width: 28px; height: 1px; background: var(--green-500); }
h1, h2, h3 { margin: 0; line-height: 1.18; color: var(--green-900); }
h1 { font-size: clamp(42px, 7vw, 86px); letter-spacing: -.06em; }
h2 { font-size: clamp(30px, 4.2vw, 54px); letter-spacing: -.04em; }
h3 { font-size: clamp(20px, 2vw, 26px); letter-spacing: -.02em; }
.lead { font-size: clamp(18px, 2vw, 22px); color: #42524b; max-width: 760px; margin-top: 22px; }
.muted { color: var(--gray-700); }

.hero {
    max-width: 1320px;
    min-height: calc(100vh - 76px);
    margin: 0 auto;
    padding: clamp(42px, 7vw, 88px) clamp(18px, 4vw, 34px);
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
    align-items: center;
    gap: clamp(26px, 5vw, 72px);
}
.hero-copy { position: relative; z-index: 1; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 34px; }
.hero-art {
    min-height: 530px;
    border-radius: 38px;
    background:
        radial-gradient(circle at 30% 16%, rgba(226, 208, 180, .8), transparent 28%),
        linear-gradient(145deg, rgba(16, 38, 31, .95), rgba(35, 80, 68, .76));
    padding: clamp(18px, 3vw, 34px);
    box-shadow: var(--shadow);
    display: grid;
    place-items: center;
    overflow: hidden;
}
.hero-art img { width: 100%; height: auto; filter: drop-shadow(0 24px 40px rgba(0,0,0,.22)); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 20px;
    border-radius: 999px;
    font-weight: 700;
    border: 1px solid var(--green-900);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(16, 38, 31, .14); }
.btn.primary { background: var(--green-900); color: var(--sand-50); }
.btn.ghost { color: var(--green-900); background: rgba(251, 247, 239, .62); }

.stat-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-top: 46px;
}
.stat-card {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: rgba(255,255,255,.42);
}
.stat-card strong { display: block; font-size: 28px; color: var(--green-900); }
.stat-card span { color: var(--gray-700); font-size: 14px; }

.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.section-head p { max-width: 580px; }
.grid { display: grid; gap: 22px; }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255,255,255,.56);
    box-shadow: 0 16px 45px rgba(16,38,31,.08);
    overflow: hidden;
}
.card.pad { padding: clamp(22px, 3vw, 32px); }
.card img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background: var(--sand-100); }
.card-body { padding: 22px; }
.tag-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(78, 128, 110, .12);
    color: var(--green-700);
    font-size: 13px;
    font-weight: 700;
}
.time { color: #69756f; font-size: 14px; margin-top: 12px; display: block; }

.band {
    background: linear-gradient(180deg, rgba(16,38,31,.04), rgba(226,208,180,.26));
    border-block: 1px solid var(--line);
}
.feature {
    display: grid;
    grid-template-columns: minmax(260px, .82fr) minmax(0, 1.18fr);
    gap: clamp(28px, 5vw, 68px);
    align-items: center;
}
.feature.reverse { grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr); }
.feature-art { border-radius: 34px; overflow: hidden; background: var(--green-900); box-shadow: var(--shadow); }
.feature-art img { width: 100%; min-height: 360px; object-fit: cover; }
.check-list { list-style: none; margin: 28px 0 0; padding: 0; display: grid; gap: 14px; }
.check-list li { position: relative; padding-left: 30px; color: var(--gray-700); }
.check-list li::before { content: ""; position: absolute; left: 0; top: .58em; width: 12px; height: 12px; border-radius: 50%; background: var(--green-500); box-shadow: 0 0 0 6px rgba(78,128,110,.13); }

.timeline { position: relative; display: grid; gap: 18px; }
.timeline::before { content: ""; position: absolute; left: 20px; top: 8px; bottom: 8px; width: 2px; background: var(--line); }
.step { position: relative; padding: 22px 22px 22px 58px; background: rgba(255,255,255,.6); border: 1px solid var(--line); border-radius: 24px; }
.step::before { content: attr(data-step); position: absolute; left: 0; top: 22px; width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; background: var(--green-900); color: var(--sand-50); font-weight: 800; }
.step h3 { margin-bottom: 8px; }

.topic-filter { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 26px; }
.filter-btn { border: 1px solid var(--line); background: rgba(255,255,255,.65); border-radius: 999px; padding: 9px 14px; cursor: pointer; color: var(--green-900); font-weight: 700; }
.filter-btn.active, .filter-btn:hover { background: var(--green-900); color: var(--sand-50); }

.faq { display: grid; gap: 14px; }
.faq details { border: 1px solid var(--line); border-radius: 22px; padding: 18px 20px; background: rgba(255,255,255,.58); }
.faq summary { cursor: pointer; font-weight: 800; color: var(--green-900); }
.faq p { margin-top: 12px; }

.info-panel {
    padding: clamp(24px, 4vw, 42px);
    border-radius: 34px;
    background: var(--green-900);
    color: var(--sand-50);
    box-shadow: var(--shadow);
}
.info-panel h2, .info-panel h3 { color: var(--sand-50); }
.info-panel p { color: rgba(251,247,239,.78); }
.domain-pill {
    display: inline-flex;
    margin-top: 16px;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(251,247,239,.12);
    color: var(--sand-50);
    word-break: break-all;
}

.form-grid { display: grid; gap: 16px; }
.form-row { display: grid; gap: 8px; }
label { color: var(--green-900); font-weight: 800; }
input, select, textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 13px 14px;
    font: inherit;
    background: rgba(255,255,255,.74);
    color: var(--gray-900);
}
textarea { min-height: 150px; resize: vertical; }
.notice { margin-top: 14px; font-weight: 700; color: var(--green-700); min-height: 1.5em; }

.site-footer {
    padding: 46px clamp(18px, 4vw, 52px) 28px;
    background: var(--green-900);
    color: var(--sand-50);
}
.site-footer p { color: rgba(251,247,239,.72); margin-top: 8px; }
.footer-grid { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1.15fr .8fr 1fr; gap: 26px; }
.footer-bottom { max-width: var(--max); margin: 34px auto 0; padding-top: 20px; border-top: 1px solid rgba(251,247,239,.18); display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; color: rgba(251,247,239,.78); }

@media (max-width: 980px) {
    .hero, .feature, .feature.reverse { grid-template-columns: 1fr; }
    .hero { min-height: auto; }
    .hero-art { min-height: 380px; }
    .grid.three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stat-strip { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
    .site-header { align-items: center; }
    .nav-toggle { display: inline-flex; }
    .site-nav { display: none; position: absolute; left: 18px; right: 18px; top: 70px; padding: 14px; border: 1px solid var(--line); border-radius: 22px; background: var(--sand-50); box-shadow: var(--shadow); }
    .site-nav.open { display: grid; }
    .site-nav a { border-radius: 14px; }
    .section-head { display: grid; }
    .grid.three, .grid.two { grid-template-columns: 1fr; }
    .stat-strip { grid-template-columns: 1fr; }
    .hero-art { min-height: 300px; border-radius: 28px; }
    .card-body { padding: 18px; }
    .section { padding-block: 50px; }
}