:root {
    --green-950: #10231d;
    --green-900: #173229;
    --green-800: #20473b;
    --green-700: #2f5f4f;
    --green-100: #dfe8df;
    --cream: #f7f1e6;
    --cream-2: #fffaf0;
    --sand: #e7d8bd;
    --gold: #b98d52;
    --gray-900: #222426;
    --gray-700: #585d5a;
    --gray-100: #f2f0ea;
    --line: rgba(32, 71, 59, 0.16);
    --shadow: 0 18px 50px rgba(16, 35, 29, 0.12);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --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: linear-gradient(180deg, var(--cream-2) 0%, var(--cream) 42%, #edf1e8 100%);
    line-height: 1.72;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(247, 241, 230, 0.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; min-height: 76px; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: 0.04em; }
.brand-mark {
    width: 40px; height: 40px; border-radius: 14px;
    display: grid; place-items: center;
    color: var(--cream-2); background: radial-gradient(circle at 30% 22%, #658778, var(--green-900));
    box-shadow: 0 10px 28px rgba(16, 35, 29, 0.18);
}
.brand-text { color: var(--green-950); font-size: 1.04rem; }
.main-nav { display: flex; align-items: center; gap: 5px; }
.main-nav a {
    padding: 10px 13px;
    border-radius: 999px;
    color: var(--green-900);
    font-size: 0.94rem;
    transition: background .2s ease, color .2s ease, transform .2s ease;
}
.main-nav a:hover, .main-nav a.active { background: var(--green-900); color: var(--cream-2); transform: translateY(-1px); }
.nav-toggle { display: none; border: 0; background: transparent; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; margin: 5px 0; background: var(--green-900); border-radius: 5px; }

.hero {
    position: relative;
    min-height: 720px;
    display: grid;
    align-items: center;
    overflow: hidden;
    isolation: isolate;
}
.hero::before {
    content: "";
    position: absolute; inset: 0;
    background:
        radial-gradient(circle at 72% 26%, rgba(185, 141, 82, .20), transparent 32%),
        radial-gradient(circle at 18% 24%, rgba(47, 95, 79, .22), transparent 36%),
        linear-gradient(135deg, rgba(247, 241, 230, .76), rgba(247, 241, 230, .96));
    z-index: -2;
}
.hero::after {
    content: "";
    position: absolute; inset: 0;
    background-image: linear-gradient(rgba(32,71,59,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(32,71,59,.05) 1px, transparent 1px);
    background-size: 68px 68px;
    mask-image: linear-gradient(180deg, rgba(0,0,0,.8), transparent 85%);
    z-index: -1;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; padding: 72px 0 84px; }
.kicker { color: var(--green-700); font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; font-size: .82rem; }
h1, .page-title { margin: 16px 0 20px; font-size: clamp(2.45rem, 6vw, 5.4rem); line-height: 1.05; color: var(--green-950); letter-spacing: -0.06em; }
.lead { font-size: clamp(1.05rem, 2vw, 1.24rem); color: var(--gray-700); max-width: 740px; }
.hero-actions, .section-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    border-radius: 999px; padding: 13px 19px; font-weight: 750;
    border: 1px solid var(--green-800);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn.primary { background: var(--green-900); color: var(--cream-2); box-shadow: 0 15px 34px rgba(16,35,29,.18); }
.btn.secondary { background: rgba(255,255,255,.45); color: var(--green-900); }
.btn:hover { transform: translateY(-2px); box-shadow: 0 18px 34px rgba(16,35,29,.14); }
.hero-panel {
    background: rgba(255, 250, 240, .72);
    border: 1px solid rgba(32, 71, 59, .14);
    box-shadow: var(--shadow);
    border-radius: var(--radius-lg);
    padding: 18px;
}
.hero-panel img { border-radius: 22px; background: #eaf0e8; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 14px; }
.metric { border-radius: 18px; background: rgba(32,71,59,.06); padding: 14px; }
.metric strong { display: block; color: var(--green-950); font-size: 1.3rem; }
.metric span { color: var(--gray-700); font-size: .88rem; }

.section { padding: 88px 0; }
.section.compact { padding: 58px 0; }
.section-dark { background: var(--green-950); color: var(--cream-2); }
.section-dark .section-title, .section-dark h2, .section-dark h3 { color: var(--cream-2); }
.section-dark .muted, .section-dark p { color: rgba(255,250,240,.76); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 34px; }
.section-head-spaced { margin-top: 34px; }
.section-title { font-size: clamp(1.9rem, 4vw, 3.25rem); line-height: 1.12; color: var(--green-950); letter-spacing: -0.04em; margin: 0 0 12px; }
.muted { color: var(--gray-700); }
.eyebrow { display: inline-flex; color: var(--green-700); font-weight: 800; letter-spacing: .14em; font-size: .78rem; margin-bottom: 12px; }

.grid { display: grid; gap: 22px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
    background: rgba(255, 250, 240, .78);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: 0 15px 40px rgba(16,35,29,.07);
}
.card.clean { box-shadow: none; }
.card h3 { color: var(--green-950); line-height: 1.28; margin: 14px 0 8px; font-size: 1.25rem; }
.card p { color: var(--gray-700); margin: 0; }
.card-img { margin: -8px -8px 18px; border-radius: 22px; overflow: hidden; border: 1px solid var(--line); background: var(--gray-100); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.tag { display: inline-flex; align-items: center; border-radius: 999px; padding: 6px 10px; background: rgba(47,95,79,.10); color: var(--green-800); font-weight: 700; font-size: .78rem; }
.time { color: var(--gold); font-weight: 700; }
.card-list { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.card-list li { position: relative; padding-left: 22px; color: var(--gray-700); }
.card-list li::before { content: ""; position: absolute; left: 0; top: .74em; width: 8px; height: 8px; border-radius: 50%; background: var(--green-700); }

.bento { display: grid; grid-template-columns: 1.2fr .8fr; gap: 22px; }
.bento .wide { grid-row: span 2; }
.feature-block {
    border-radius: var(--radius-lg);
    padding: 34px;
    background: linear-gradient(145deg, rgba(32,71,59,.10), rgba(255,250,240,.78));
    border: 1px solid var(--line);
}
.feature-block h3 { margin: 0 0 10px; font-size: 1.5rem; color: var(--green-950); }
.timeline { position: relative; display: grid; gap: 18px; }
.timeline::before { content: ""; position: absolute; left: 16px; top: 4px; bottom: 4px; width: 2px; background: rgba(47,95,79,.2); }
.timeline-item { position: relative; padding-left: 54px; }
.timeline-item::before { content: ""; position: absolute; left: 7px; top: 8px; width: 20px; height: 20px; border-radius: 50%; background: var(--cream-2); border: 4px solid var(--green-700); }
.timeline-item h3 { margin: 0 0 6px; font-size: 1.1rem; color: var(--green-950); }

.page-hero { padding: 82px 0 56px; background: linear-gradient(145deg, rgba(32,71,59,.12), rgba(247,241,230,.78)); border-bottom: 1px solid var(--line); }
.page-hero .page-title { max-width: 960px; }
.breadcrumb { color: var(--green-700); font-weight: 700; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.breadcrumb a { text-decoration: underline; text-underline-offset: 4px; }
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin: 0 0 28px; }
.filter-btn { border: 1px solid var(--line); background: rgba(255,250,240,.7); color: var(--green-900); border-radius: 999px; padding: 10px 14px; cursor: pointer; }
.filter-btn.active { background: var(--green-900); color: var(--cream-2); }
.video-card { cursor: pointer; position: relative; overflow: hidden; }
.video-card::after { content: "播放"; position: absolute; right: 24px; top: 24px; background: rgba(16,35,29,.82); color: var(--cream-2); padding: 8px 13px; border-radius: 999px; font-weight: 800; }
.notice {
    border-left: 5px solid var(--green-700);
    padding: 18px 20px;
    background: rgba(255,250,240,.70);
    border-radius: 0 18px 18px 0;
    color: var(--gray-700);
}

.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 7px; font-weight: 750; color: var(--green-950); }
.form input, .form textarea, .form select {
    width: 100%; border: 1px solid var(--line); border-radius: 14px; padding: 13px 14px;
    background: rgba(255,250,240,.85); color: var(--gray-900); outline: none;
}
.form textarea { min-height: 142px; resize: vertical; }
.form input:focus, .form textarea:focus, .form select:focus { border-color: var(--green-700); box-shadow: 0 0 0 4px rgba(47,95,79,.10); }
.form-message { min-height: 22px; color: var(--green-700); font-weight: 700; }
.faq { display: grid; gap: 12px; }
.faq details { background: rgba(255,250,240,.76); border: 1px solid var(--line); border-radius: 18px; padding: 17px 19px; }
.faq summary { cursor: pointer; font-weight: 800; color: var(--green-950); }
.faq p { color: var(--gray-700); margin-bottom: 0; }

.site-footer { background: #0c1b17; color: rgba(255,250,240,.78); padding: 54px 0; }
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr 1fr; gap: 28px; }
.site-footer h2 { font-size: 1rem; color: var(--cream-2); margin: 0 0 14px; }
.site-footer a { display: block; margin: 7px 0; color: rgba(255,250,240,.84); }
.footer-brand { margin-bottom: 12px; }
.footer-brand .brand-text { color: var(--cream-2); }
.back-top { position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--green-900); color: var(--cream-2); box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translateY(10px); transition: .2s ease; }
.back-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }

.modal { position: fixed; inset: 0; z-index: 50; display: none; align-items: center; justify-content: center; padding: 24px; background: rgba(8,18,15,.72); }
.modal.show { display: flex; }
.modal-panel { width: min(760px, 100%); border-radius: 24px; background: var(--cream-2); padding: 28px; box-shadow: 0 25px 80px rgba(0,0,0,.28); }
.modal-head { display: flex; justify-content: space-between; gap: 18px; align-items: center; }
.modal-close { border: 0; border-radius: 50%; width: 38px; height: 38px; background: rgba(32,71,59,.12); color: var(--green-950); cursor: pointer; font-weight: 900; }
.video-placeholder { margin-top: 16px; min-height: 240px; border-radius: 18px; background: radial-gradient(circle at 30% 25%, rgba(185,141,82,.22), transparent 34%), linear-gradient(145deg, var(--green-950), var(--green-700)); color: var(--cream-2); display: grid; place-items: center; text-align: center; padding: 24px; }
.video-placeholder strong { display: block; font-size: 1.4rem; margin-bottom: 6px; }

@media (max-width: 980px) {
    .hero-grid, .bento, .grid.two, .grid.three, .grid.four, .footer-grid { grid-template-columns: 1fr; }
    .section-head { display: block; }
    .hero { min-height: auto; }
}
@media (max-width: 760px) {
    .container { width: min(100% - 28px, var(--max)); }
    .nav-toggle { display: block; }
    .main-nav { position: absolute; left: 14px; right: 14px; top: 76px; display: none; flex-direction: column; align-items: stretch; padding: 14px; background: var(--cream-2); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 12px 14px; }
    .hero-grid { padding: 46px 0 60px; gap: 32px; }
    .metrics { grid-template-columns: 1fr; }
    .section { padding: 62px 0; }
    .card, .feature-block { padding: 20px; border-radius: 22px; }
    h1, .page-title { letter-spacing: -0.045em; }
}