:root {
    --ink: #24302d;
    --muted: #6d756f;
    --green: #0f3f33;
    --green-soft: #e3ede6;
    --cream: #f7f1e5;
    --paper: #fffdf8;
    --line: rgba(36, 48, 45, 0.12);
    --shadow: 0 22px 70px rgba(18, 43, 36, 0.12);
    --radius: 24px;
}

* { 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(--ink);
    background: linear-gradient(180deg, #fbf7ed 0%, #f5efe2 42%, #eef3ed 100%);
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(247, 241, 229, 0.86);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}
.nav-wrap {
    min-height: 72px;
    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: 0.06em; }
.brand-mark {
    width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center;
    color: #f6f0e4; background: radial-gradient(circle at 35% 30%, #69907f, var(--green));
    box-shadow: 0 12px 28px rgba(15, 63, 51, 0.22);
}
.brand-text { font-size: 20px; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
    padding: 10px 13px;
    border-radius: 999px;
    color: #3d4843;
    font-size: 15px;
    transition: 0.2s ease;
}
.site-nav a:hover,
.site-nav a.active { background: var(--green); color: #fff8ea; }
.nav-toggle {
    display: none; border: 1px solid var(--line); background: var(--paper); border-radius: 12px;
    width: 44px; height: 40px; font-size: 22px; color: var(--green);
}
.hero {
    padding: 76px 0 58px;
}
.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
    gap: 46px;
    align-items: center;
}
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    border: 1px solid rgba(15, 63, 51, 0.18);
    border-radius: 999px;
    background: rgba(255, 253, 248, 0.7);
    color: var(--green);
    font-weight: 700;
    font-size: 14px;
}
h1, h2, h3 { line-height: 1.22; color: var(--ink); margin: 0; }
h1 { font-size: clamp(38px, 6vw, 76px); letter-spacing: -0.06em; margin: 22px 0; }
h2 { font-size: clamp(28px, 4vw, 46px); letter-spacing: -0.04em; }
h3 { font-size: 22px; }
p { margin: 0; color: var(--muted); }
.hero-lead { font-size: 18px; max-width: 680px; color: #4c5852; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 46px; padding: 12px 18px; border-radius: 999px;
    font-weight: 800; border: 1px solid transparent;
}
.btn.primary { background: var(--green); color: #fff9ec; box-shadow: 0 16px 35px rgba(15, 63, 51, 0.2); }
.btn.ghost { border-color: rgba(15, 63, 51, 0.22); background: rgba(255, 253, 248, 0.72); color: var(--green); }
.hero-card {
    background: rgba(255, 253, 248, 0.75);
    border: 1px solid rgba(15, 63, 51, 0.12);
    border-radius: 34px;
    padding: 18px;
    box-shadow: var(--shadow);
}
.hero-card img { border-radius: 24px; border: 1px solid rgba(15, 63, 51, 0.1); }
.metrics {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 20px;
}
.metric {
    background: rgba(15, 63, 51, 0.06);
    border-radius: 18px;
    padding: 14px;
}
.metric strong { display: block; color: var(--green); font-size: 22px; }
.metric span { display: block; color: var(--muted); font-size: 13px; }
.section { padding: 72px 0; }
.section.compact { padding: 48px 0; }
.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 28px;
}
.section-head p { max-width: 650px; }
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
    background: rgba(255, 253, 248, 0.78);
    border: 1px solid rgba(15, 63, 51, 0.12);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 18px 46px rgba(18, 43, 36, 0.08);
}
.card img { width: 100%; border-radius: 18px; margin-bottom: 16px; background: var(--green-soft); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.tag {
    display: inline-flex; align-items: center; border-radius: 999px;
    background: rgba(15, 63, 51, 0.08); color: var(--green);
    padding: 5px 10px; font-size: 13px; font-weight: 700;
}
.time { color: #829087; font-size: 14px; }
.feature {
    display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center;
    background: linear-gradient(135deg, rgba(15,63,51,0.96), rgba(47,88,70,0.92));
    color: #fffaf0;
    border-radius: 34px;
    padding: 34px;
    overflow: hidden;
}
.feature h2, .feature h3 { color: #fffaf0; }
.feature p { color: rgba(255, 250, 240, 0.78); }
.feature img { border-radius: 24px; border: 1px solid rgba(255,255,255,0.18); }
.list { display: grid; gap: 14px; }
.list-item {
    display: grid;
    grid-template-columns: 34px 1fr;
    gap: 12px;
    align-items: start;
    padding: 14px;
    border-radius: 18px;
    background: rgba(255, 253, 248, 0.65);
    border: 1px solid rgba(15, 63, 51, 0.08);
}
.list-num {
    width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%;
    background: var(--green); color: #fff8ea; font-weight: 800;
}
.video-card { padding: 0; overflow: hidden; }
.video-card .video-info { padding: 18px 20px 22px; }
.play-cover { position: relative; }
.play-cover::after {
    content: "▶";
    position: absolute;
    left: 50%; top: 50%; transform: translate(-50%, -50%);
    width: 58px; height: 58px; display: grid; place-items: center;
    border-radius: 50%; background: rgba(255,253,248,0.92); color: var(--green); font-weight: 900;
    box-shadow: 0 12px 32px rgba(0,0,0,0.16);
}
.faq { display: grid; gap: 14px; }
details {
    background: rgba(255, 253, 248, 0.82);
    border: 1px solid rgba(15, 63, 51, 0.12);
    border-radius: 20px;
    padding: 18px 20px;
}
summary { cursor: pointer; font-weight: 800; color: var(--ink); }
details p { margin-top: 12px; }
.page-hero { padding: 64px 0 36px; }
.page-hero h1 { max-width: 960px; }
.breadcrumb { color: var(--muted); font-size: 14px; margin-bottom: 14px; }
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px; }
.filter-btn {
    border: 1px solid rgba(15,63,51,0.16);
    background: rgba(255,253,248,0.76);
    color: var(--green);
    border-radius: 999px;
    padding: 9px 14px;
    cursor: pointer;
    font-weight: 800;
}
.filter-btn.is-active { background: var(--green); color: #fff8ea; }
.timeline { position: relative; display: grid; gap: 18px; }
.timeline::before { content: ""; position: absolute; left: 16px; top: 8px; bottom: 8px; width: 2px; background: rgba(15,63,51,0.18); }
.timeline-step { position: relative; display: grid; grid-template-columns: 34px 1fr; gap: 14px; }
.timeline-dot { width: 34px; height: 34px; border-radius: 50%; background: var(--green); border: 6px solid var(--cream); z-index: 1; }
.form {
    display: grid; gap: 14px;
}
.form label { display: grid; gap: 6px; font-weight: 800; color: var(--ink); }
.form input, .form textarea, .form select {
    width: 100%; border: 1px solid rgba(15,63,51,0.16); border-radius: 14px;
    background: rgba(255,253,248,0.95); padding: 12px 14px;
    color: var(--ink); font: inherit;
}
.form textarea { min-height: 132px; resize: vertical; }
.notice {
    border-radius: 20px;
    padding: 16px 18px;
    background: rgba(15,63,51,0.08);
    color: #385149;
    border: 1px solid rgba(15,63,51,0.12);
}
.site-footer {
    padding: 54px 0 24px;
    background: #162722;
    color: #fff9ec;
}
.site-footer p, .site-footer a, .footer-bottom { color: rgba(255,249,236,0.72); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 0.7fr 1fr; gap: 34px; }
.footer-brand { font-weight: 900; font-size: 24px; margin-bottom: 10px; }
.site-footer h3 { color: #fff9ec; margin-bottom: 10px; font-size: 17px; }
.site-footer a { display: block; margin: 6px 0; }
.domain-line { font-size: 18px; font-weight: 800; color: #fff9ec !important; word-break: break-all; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); margin-top: 30px; padding-top: 18px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 14px; }
.hidden { display: none !important; }
@media (max-width: 960px) {
    .hero-grid, .feature, .grid-2, .grid-3, .grid-4, .footer-grid { grid-template-columns: 1fr; }
    .section-head { display: block; }
    .section-head p { margin-top: 12px; }
    .site-nav {
        position: absolute; left: 20px; right: 20px; top: 72px;
        background: rgba(255,253,248,0.98); border: 1px solid var(--line); border-radius: 20px;
        padding: 12px; display: none; flex-direction: column; align-items: stretch;
        box-shadow: var(--shadow);
    }
    .site-nav.is-open { display: flex; }
    .nav-toggle { display: block; }
    .metrics { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .container { width: min(100% - 26px, 1180px); }
    .hero { padding-top: 48px; }
    .section { padding: 52px 0; }
    .feature { padding: 22px; border-radius: 26px; }
    .card { padding: 18px; }
    h1 { font-size: 40px; }
}