:root {
    --green: #173f34;
    --green-soft: #2f6a58;
    --cream: #f5efe1;
    --cream-deep: #e8ddc8;
    --gray: #28302d;
    --muted: #6b746f;
    --paper: #fffaf0;
    --line: rgba(23, 63, 52, .14);
    --shadow: 0 22px 65px rgba(24, 48, 40, .12);
}

* { 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", Arial, sans-serif;
    color: var(--gray);
    background: linear-gradient(180deg, var(--cream) 0%, #fbf7ed 40%, #f7f0df 100%);
    line-height: 1.72;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding: 16px clamp(18px, 4vw, 58px);
    background: rgba(245, 239, 225, .92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--green); letter-spacing: .04em; }
.brand img { width: 42px; height: 42px; }
.site-nav { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.site-nav a {
    padding: 9px 13px;
    border-radius: 999px;
    color: #31443c;
    font-size: 15px;
}
.site-nav a:hover, .site-nav a.active { background: var(--green); color: var(--cream); }
.nav-toggle { display: none; border: 1px solid var(--line); background: var(--paper); border-radius: 999px; padding: 8px 13px; color: var(--green); }

main { overflow: hidden; }
.container { width: min(1180px, calc(100% - 36px)); margin: 0 auto; }
.hero {
    width: min(1220px, calc(100% - 36px));
    margin: 34px auto 0;
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: clamp(28px, 5vw, 70px);
    align-items: center;
    padding: clamp(34px, 6vw, 86px);
    border: 1px solid rgba(23, 63, 52, .12);
    border-radius: 38px;
    background:
        radial-gradient(circle at 12% 20%, rgba(83, 120, 99, .18), transparent 32%),
        linear-gradient(135deg, rgba(255, 250, 240, .96), rgba(232, 221, 200, .76));
    box-shadow: var(--shadow);
}
.eyebrow { color: var(--green-soft); font-weight: 700; letter-spacing: .12em; font-size: 14px; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.18; margin: 0; color: var(--green); }
h1 { font-size: clamp(40px, 6vw, 78px); letter-spacing: -.05em; margin-top: 16px; }
h2 { font-size: clamp(28px, 4vw, 46px); letter-spacing: -.035em; }
h3 { font-size: 22px; }
p { margin: 0; }
.hero p.lead { margin-top: 20px; font-size: clamp(17px, 2vw, 21px); color: #52625a; max-width: 740px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 11px 20px;
    border-radius: 999px;
    border: 1px solid var(--green);
    background: var(--green);
    color: var(--cream);
    font-weight: 700;
}
.btn.secondary { background: transparent; color: var(--green); }
.hero-visual { position: relative; }
.hero-visual img { border-radius: 28px; box-shadow: 0 30px 80px rgba(23, 63, 52, .18); }
.float-note {
    position: absolute;
    right: -12px;
    bottom: 28px;
    width: min(280px, 72%);
    padding: 18px;
    border-radius: 20px;
    background: rgba(255, 250, 240, .92);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.float-note strong { display: block; color: var(--green); margin-bottom: 6px; }

.section { padding: clamp(58px, 8vw, 104px) 0; }
.section.alt { background: rgba(255, 250, 240, .48); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 30px; }
.section-head p { color: var(--muted); max-width: 620px; }
.grid { display: grid; gap: 20px; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.four { grid-template-columns: repeat(4, 1fr); }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.card {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 28px;
    background: rgba(255, 250, 240, .82);
    box-shadow: 0 16px 42px rgba(23, 63, 52, .08);
}
.card img { width: 100%; border-radius: 20px; margin-bottom: 18px; background: var(--cream-deep); }
.card h3 { margin-bottom: 10px; }
.card p { color: #5d6963; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.tag, .time {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    border-radius: 999px;
    background: rgba(47, 106, 88, .11);
    color: var(--green);
    font-size: 13px;
    font-weight: 700;
}
.feature-panel {
    display: grid;
    grid-template-columns: .95fr 1.05fr;
    gap: 30px;
    align-items: center;
    padding: clamp(24px, 4vw, 42px);
    border-radius: 32px;
    border: 1px solid var(--line);
    background: linear-gradient(135deg, rgba(255,250,240,.9), rgba(232,221,200,.62));
}
.feature-panel img { border-radius: 26px; box-shadow: var(--shadow); }
.feature-panel p { color: var(--muted); margin-top: 14px; }
.list-check { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 10px; }
.list-check li { padding-left: 26px; position: relative; color: #4e5d55; }
.list-check li::before { content: ""; position: absolute; left: 0; top: .62em; width: 10px; height: 10px; border-radius: 50%; background: var(--green-soft); }
.timeline { display: grid; gap: 16px; counter-reset: step; }
.timeline-item {
    counter-increment: step;
    display: grid;
    grid-template-columns: 58px 1fr;
    gap: 18px;
    align-items: start;
    padding: 20px;
    border-radius: 24px;
    border: 1px solid var(--line);
    background: rgba(255,250,240,.8);
}
.timeline-item::before {
    content: counter(step, decimal-leading-zero);
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: 18px;
    background: var(--green);
    color: var(--cream);
    font-weight: 800;
}
.video-card { overflow: hidden; padding: 0; }
.video-card .video-body { padding: 22px; }
.video-thumb { position: relative; }
.video-thumb::after {
    content: "▶";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 58px;
    height: 58px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(23, 63, 52, .82);
    color: var(--cream);
    font-size: 20px;
}
.video-card img { margin-bottom: 0; border-radius: 28px 28px 0 0; }
.faq { display: grid; gap: 14px; }
.faq details { border: 1px solid var(--line); border-radius: 22px; background: rgba(255,250,240,.82); padding: 18px 20px; }
.faq summary { cursor: pointer; font-weight: 800; color: var(--green); }
.faq details p { margin-top: 10px; color: #5d6963; }
.page-hero {
    width: min(1180px, calc(100% - 36px));
    margin: 34px auto 0;
    padding: clamp(38px, 6vw, 72px);
    border-radius: 34px;
    border: 1px solid var(--line);
    background: linear-gradient(135deg, rgba(255,250,240,.96), rgba(232,221,200,.7));
}
.page-hero p { margin-top: 18px; color: var(--muted); max-width: 790px; font-size: 18px; }
.kpi-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 28px; }
.kpi { padding: 18px; border-radius: 22px; background: rgba(23,63,52,.08); }
.kpi strong { display: block; color: var(--green); font-size: 25px; }
.form-card form { display: grid; gap: 14px; }
label { font-weight: 700; color: var(--green); }
input, textarea, select {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 13px 14px;
    background: rgba(255,250,240,.82);
    color: var(--gray);
    font: inherit;
}
textarea { min-height: 142px; resize: vertical; }
.notice { border-left: 4px solid var(--green-soft); padding: 14px 18px; background: rgba(47,106,88,.08); border-radius: 16px; color: #52625a; }
.site-footer {
    margin-top: 60px;
    padding: 42px clamp(18px, 4vw, 58px);
    background: #14362d;
    color: rgba(245,239,225,.86);
}
.footer-grid { width: min(1180px, 100%); margin: 0 auto; display: grid; grid-template-columns: 1.4fr .8fr 1fr; gap: 28px; }
.site-footer strong { display: block; color: var(--cream); margin-bottom: 10px; }
.site-footer a { display: block; color: rgba(245,239,225,.82); margin: 4px 0; }
.site-footer p { color: rgba(245,239,225,.72); }

@media (max-width: 920px) {
    .hero, .feature-panel { grid-template-columns: 1fr; }
    .grid.three, .grid.four, .grid.two, .kpi-strip, .footer-grid { grid-template-columns: 1fr 1fr; }
    .section-head { align-items: start; flex-direction: column; }
}
@media (max-width: 680px) {
    .site-header { align-items: flex-start; }
    .nav-toggle { display: inline-flex; }
    .site-nav { display: none; position: absolute; left: 18px; right: 18px; top: 74px; padding: 14px; border: 1px solid var(--line); border-radius: 22px; background: var(--paper); box-shadow: var(--shadow); }
    .site-nav.open { display: grid; grid-template-columns: 1fr 1fr; }
    .hero, .page-hero { border-radius: 26px; padding: 28px; }
    .grid.three, .grid.four, .grid.two, .kpi-strip, .footer-grid { grid-template-columns: 1fr; }
    .float-note { position: static; width: 100%; margin-top: 12px; }
    h1 { font-size: 38px; }
}