:root {
    --ink: #1f2a27;
    --muted: #63716b;
    --deep: #183c35;
    --deep-2: #0f2a25;
    --leaf: #2f6f61;
    --moss: #dbe6d6;
    --paper: #fbf7ee;
    --sand: #efe6d2;
    --line: rgba(31, 42, 39, 0.12);
    --white: #ffffff;
    --shadow: 0 18px 50px rgba(15, 42, 37, 0.12);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, var(--paper) 0%, #f7f1e5 54%, #f1eadc 100%);
    line-height: 1.72;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px);
    background: rgba(251, 247, 238, 0.86);
    border-bottom: 1px solid var(--line);
}
.nav-wrap {
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
}
.brand, .footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: 0.04em;
    color: var(--deep-2);
}
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    color: #31423d;
    font-size: 15px;
}
.site-nav a:hover, .site-nav a.active {
    background: var(--deep);
    color: var(--paper);
}
.menu-toggle {
    display: none;
    border: 1px solid var(--line);
    background: var(--white);
    border-radius: 12px;
    padding: 8px 11px;
    font-size: 20px;
}

.hero {
    padding: 90px 0 70px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 12% 10%, rgba(47, 111, 97, 0.18), transparent 34%), radial-gradient(circle at 80% 14%, rgba(219, 230, 214, 0.86), transparent 28%);
    pointer-events: none;
}
.hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: 1.03fr 0.97fr;
    gap: 54px;
    align-items: center;
}
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 7px 13px;
    background: rgba(47, 111, 97, 0.12);
    border: 1px solid rgba(47, 111, 97, 0.18);
    color: var(--deep);
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
}
h1, h2, h3 { line-height: 1.18; margin: 0; color: var(--deep-2); }
h1 { font-size: clamp(42px, 6vw, 72px); letter-spacing: -0.05em; margin-top: 22px; }
h2 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -0.035em; }
h3 { font-size: 22px; }
p { margin: 0; color: var(--muted); }
.hero-lead { margin-top: 22px; font-size: 18px; max-width: 650px; color: #43524d; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 32px; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 20px;
    border-radius: 999px;
    border: 1px solid var(--deep);
    font-weight: 700;
}
.btn-primary { background: var(--deep); color: var(--paper); box-shadow: var(--shadow); }
.btn-secondary { background: rgba(255,255,255,0.68); color: var(--deep); }
.hero-panel {
    background: rgba(255,255,255,0.72);
    border: 1px solid rgba(31, 42, 39, 0.1);
    border-radius: var(--radius-lg);
    padding: 18px;
    box-shadow: var(--shadow);
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 14px;
}
.stat-card {
    padding: 16px;
    border-radius: 16px;
    background: rgba(239, 230, 210, 0.68);
    border: 1px solid rgba(31, 42, 39, 0.08);
}
.stat-card strong { display: block; font-size: 22px; color: var(--deep); }
.stat-card span { color: var(--muted); font-size: 13px; }

.section { padding: 76px 0; }
.section.alt { background: rgba(219, 230, 214, 0.36); }
.section-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 26px;
    margin-bottom: 34px;
}
.section-head p { max-width: 620px; }
.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(255,255,255,0.72);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: 0 12px 30px rgba(15, 42, 37, 0.06);
}
.card:hover { transform: translateY(-3px); transition: transform .22s ease; }
.card-img { margin: -8px -8px 18px; border-radius: 16px; overflow: hidden; background: var(--moss); }
.tag-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 13px; }
.tag {
    display: inline-flex;
    border-radius: 999px;
    padding: 5px 10px;
    background: rgba(47,111,97,0.10);
    color: var(--deep);
    font-size: 13px;
    font-weight: 700;
}
.card h3 { margin-bottom: 10px; }
.meta-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; color: var(--muted); font-size: 13px; }
.meta-row span { padding: 5px 9px; border: 1px solid var(--line); border-radius: 999px; background: rgba(251,247,238,0.72); }

.topic-band {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 32px;
    align-items: center;
    border-radius: var(--radius-lg);
    padding: 28px;
    background: linear-gradient(135deg, rgba(24,60,53,0.96), rgba(47,111,97,0.9));
    color: var(--paper);
    overflow: hidden;
}
.topic-band h2, .topic-band p { color: var(--paper); }
.topic-band p { opacity: .84; margin-top: 14px; }
.topic-list { display: grid; gap: 12px; }
.topic-item {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 16px;
    background: rgba(255,255,255,0.11);
    border: 1px solid rgba(255,255,255,0.16);
    border-radius: 16px;
}
.topic-item span:last-child { color: #e9dfca; }

.path {
    position: relative;
    display: grid;
    gap: 18px;
}
.path-step {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 18px;
    align-items: start;
}
.path-step .num {
    width: 54px;
    height: 54px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--deep);
    color: var(--paper);
    font-weight: 800;
}
.path-step .box { padding: 18px 20px; border-radius: 18px; background: rgba(255,255,255,0.7); border: 1px solid var(--line); }
.path-step h3 { margin-bottom: 7px; }

.video-card { padding: 0; overflow: hidden; }
.video-thumb { position: relative; }
.video-thumb::after {
    content: "▶";
    position: absolute;
    left: 18px;
    bottom: 18px;
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(251,247,238,0.86);
    color: var(--deep);
    font-weight: 900;
}
.video-body { padding: 22px; }

.page-hero {
    padding: 72px 0 46px;
    background: radial-gradient(circle at 80% 20%, rgba(47,111,97,0.15), transparent 35%);
}
.page-hero p { max-width: 760px; margin-top: 18px; font-size: 17px; }
.breadcrumb { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.breadcrumb a { color: var(--deep); font-weight: 700; }

.filter-bar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}
.filter-btn {
    cursor: pointer;
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.72);
    border-radius: 999px;
    padding: 10px 14px;
    color: var(--deep);
    font-weight: 700;
}
.filter-btn.active { background: var(--deep); color: var(--paper); }
.timeline {
    display: grid;
    gap: 20px;
    border-left: 2px solid rgba(47,111,97,0.22);
    padding-left: 24px;
}
.timeline-card { position: relative; }
.timeline-card::before {
    content: "";
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--leaf);
    position: absolute;
    left: -32px;
    top: 28px;
}

.form-box {
    display: grid;
    gap: 14px;
}
.form-box label { font-weight: 700; color: var(--deep-2); }
.form-box input, .form-box textarea, .form-box select {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255,255,255,0.74);
    min-height: 46px;
    padding: 10px 13px;
    font: inherit;
    color: var(--ink);
}
.form-box textarea { min-height: 132px; resize: vertical; }
.notice {
    padding: 16px 18px;
    border-radius: 16px;
    border: 1px solid rgba(47,111,97,0.18);
    background: rgba(47,111,97,0.09);
    color: var(--deep);
}
.faq-list { display: grid; gap: 14px; }
details {
    background: rgba(255,255,255,0.7);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 18px 20px;
}
summary { cursor: pointer; font-weight: 800; color: var(--deep-2); }
details p { margin-top: 12px; }

.site-footer {
    background: var(--deep-2);
    color: var(--paper);
    padding: 54px 0 24px;
}
.site-footer p, .site-footer a, .site-footer span { color: rgba(251,247,238,0.74); }
.footer-grid {
    display: grid;
    grid-template-columns: 1.25fr .85fr .9fr;
    gap: 38px;
}
.footer-grid strong { display: block; margin-bottom: 12px; color: var(--paper); }
.footer-grid a { display: block; margin: 7px 0; }
.footer-bottom {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid rgba(251,247,238,0.14);
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    font-size: 13px;
}
.footer-brand { margin-bottom: 14px; }
.footer-brand span { color: var(--paper); }

@media (max-width: 980px) {
    .hero-grid, .topic-band, .grid-3, .grid-4, .footer-grid { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    .section-head { align-items: start; flex-direction: column; }
    .hero { padding-top: 58px; }
}
@media (max-width: 760px) {
    .container { width: min(100% - 28px, 1180px); }
    .menu-toggle { display: inline-flex; }
    .site-nav {
        position: absolute;
        left: 14px;
        right: 14px;
        top: 72px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        background: rgba(251,247,238,0.98);
        border: 1px solid var(--line);
        border-radius: 18px;
        padding: 12px;
        box-shadow: var(--shadow);
    }
    .site-nav.open { display: flex; }
    .site-nav a { border-radius: 12px; }
    .hero-stats { grid-template-columns: 1fr; }
    .section { padding: 54px 0; }
    .path-step { grid-template-columns: 1fr; gap: 10px; }
}

.mt-14 { margin-top: 14px; }
.mt-22 { margin-top: 22px; }