:root {
    --ink: #24150d;
    --ink-soft: #4d3322;
    --paper: #f2e4c8;
    --paper-deep: #dfc797;
    --gold: #b98b3b;
    --gold-soft: #e5c87b;
    --red: #8b2e22;
    --red-deep: #5e1c18;
    --line: rgba(82, 51, 31, .22);
    --shadow: 0 24px 60px rgba(37, 22, 12, .22);
    --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    font-family: "Noto Serif SC", "Songti SC", "Microsoft YaHei", serif;
    line-height: 1.75;
    background:
        radial-gradient(circle at 14% 10%, rgba(185, 139, 59, .28), transparent 22rem),
        radial-gradient(circle at 88% 4%, rgba(139, 46, 34, .18), transparent 28rem),
        linear-gradient(135deg, #2a1810 0 9rem, #ead7af 9rem 100%);
    min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(36, 21, 13, .92);
    color: var(--paper);
    border-bottom: 1px solid rgba(229, 200, 123, .28);
    backdrop-filter: blur(14px);
}
.top-strip {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: .45rem clamp(1rem, 4vw, 3rem);
    font-size: .86rem;
    color: #f4ddad;
    border-bottom: 1px solid rgba(242, 228, 200, .12);
}
.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    max-width: 1240px;
    margin: 0 auto;
    padding: .85rem clamp(1rem, 3vw, 2rem);
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: .7rem;
    min-width: 185px;
}
.brand-mark {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: var(--paper);
    background: radial-gradient(circle at 35% 30%, var(--gold-soft), var(--red) 60%, var(--red-deep));
    box-shadow: inset 0 0 0 2px rgba(255,255,255,.15);
    font-weight: 900;
}
.brand strong, .brand em { display: block; font-style: normal; line-height: 1.1; }
.brand strong { font-size: 1.18rem; letter-spacing: .08em; }
.brand em { font-size: .78rem; color: #e9c982; margin-top: .18rem; }
.site-nav {
    display: flex;
    align-items: center;
    gap: .25rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.site-nav a {
    padding: .5rem .7rem;
    border-radius: 999px;
    color: #f5e4c8;
    font-size: .95rem;
}
.site-nav a:hover, .site-nav a.active {
    background: rgba(229, 200, 123, .16);
    color: #fff4ce;
}
.nav-toggle {
    display: none;
    border: 1px solid rgba(229, 200, 123, .36);
    background: rgba(255,255,255,.08);
    color: var(--paper);
    padding: .45rem .9rem;
    border-radius: 999px;
}
main {
    max-width: 1240px;
    margin: 0 auto;
    padding: clamp(1.2rem, 3vw, 2.2rem);
}
.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, .8fr);
    gap: clamp(1.2rem, 3vw, 3rem);
    align-items: center;
    margin: 1rem 0 2.4rem;
}
.hero-card, .paper-card, .feature-card, .note-card, .table-card, .form-card, .video-card {
    background: linear-gradient(135deg, rgba(255, 248, 228, .96), rgba(230, 204, 152, .94));
    border: 1px solid rgba(82, 51, 31, .22);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}
.hero-card::before, .paper-card::before, .feature-card::before, .note-card::before, .table-card::before, .form-card::before, .video-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: .36;
    background-image:
        linear-gradient(rgba(65, 38, 22, .06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(65, 38, 22, .05) 1px, transparent 1px);
    background-size: 24px 24px;
}
.hero-card { padding: clamp(1.5rem, 4vw, 3rem); }
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .28rem .75rem;
    border: 1px solid rgba(139, 46, 34, .25);
    border-radius: 999px;
    color: var(--red-deep);
    background: rgba(255,255,255,.35);
    font-size: .92rem;
    font-weight: 700;
}
h1, h2, h3 { margin: 0; line-height: 1.28; color: #2a160c; }
h1 { font-size: clamp(2.1rem, 6vw, 4.9rem); letter-spacing: .06em; margin-top: 1rem; }
h2 { font-size: clamp(1.55rem, 3.5vw, 2.5rem); margin-bottom: .8rem; }
h3 { font-size: 1.2rem; margin-bottom: .45rem; }
p { margin: .5rem 0 0; }
.lead { font-size: clamp(1rem, 2.1vw, 1.18rem); color: var(--ink-soft); max-width: 760px; }
.cta-row { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.35rem; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: .62rem 1rem;
    border-radius: 999px;
    border: 1px solid rgba(94, 28, 24, .28);
    background: var(--red);
    color: #fff3da;
    font-weight: 800;
    box-shadow: 0 10px 24px rgba(94, 28, 24, .2);
}
.btn.alt {
    background: rgba(255,255,255,.3);
    color: var(--red-deep);
}
.hero-visual {
    padding: 1rem;
    min-height: 360px;
    display: grid;
    place-items: center;
}
.section { margin: 2.2rem 0; }
.section-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: end;
    margin-bottom: 1rem;
}
.section-head p { max-width: 680px; color: var(--ink-soft); }
.grid { display: grid; gap: 1rem; }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.feature-card, .note-card, .video-card { padding: 1.25rem; }
.feature-card img, .note-card img, .video-card img { width: 100%; height: 150px; object-fit: contain; margin-bottom: .8rem; }
.kicker { color: var(--red); font-weight: 800; letter-spacing: .05em; font-size: .92rem; }
.badge-list { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .85rem; }
.badge { border: 1px solid rgba(139, 46, 34, .26); border-radius: 999px; padding: .25rem .58rem; background: rgba(255,255,255,.32); font-size: .88rem; color: var(--ink-soft); }
.paper-card { padding: 1.4rem; }
.search-panel {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: .75rem;
    align-items: end;
}
.field label { display: block; font-weight: 800; margin-bottom: .35rem; color: var(--ink); }
.field input, .field select, .field textarea {
    width: 100%;
    border: 1px solid rgba(82, 51, 31, .28);
    background: rgba(255, 253, 245, .72);
    border-radius: 14px;
    padding: .75rem .85rem;
    color: var(--ink);
    outline: none;
}
.field textarea { min-height: 130px; resize: vertical; }
.timeline {
    position: relative;
    display: grid;
    gap: 1rem;
}
.timeline::before {
    content: "";
    position: absolute;
    left: 1.25rem;
    top: .4rem;
    bottom: .4rem;
    width: 2px;
    background: linear-gradient(var(--red), var(--gold));
}
.time-item {
    position: relative;
    padding-left: 3rem;
}
.time-item::before {
    content: "";
    position: absolute;
    left: .82rem;
    top: .4rem;
    width: .85rem;
    height: .85rem;
    border-radius: 50%;
    background: var(--gold);
    border: 3px solid var(--red-deep);
}
.table-card { padding: 1rem; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { text-align: left; padding: .85rem .75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--red-deep); background: rgba(185, 139, 59, .13); }
tr:last-child td { border-bottom: 0; }
.notice {
    border-left: 5px solid var(--red);
    padding: 1rem 1.15rem;
    background: rgba(255,255,255,.34);
    border-radius: 0 16px 16px 0;
    color: var(--ink-soft);
}
.archive-card {
    display: grid;
    grid-template-columns: 190px 1fr;
    gap: 1rem;
    align-items: center;
}
.archive-card img { width: 190px; height: 190px; object-fit: contain; }
.index-list { list-style: none; padding: 0; margin: .65rem 0 0; display: grid; gap: .55rem; }
.index-list li { padding: .55rem .7rem; border: 1px dashed rgba(82,51,31,.24); border-radius: 12px; background: rgba(255,255,255,.26); }
.video-frame {
    position: relative;
    aspect-ratio: 16 / 9;
    border-radius: 18px;
    overflow: hidden;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #311b12, #8b2e22 55%, #e5c87b);
    display: grid;
    place-items: center;
}
.play-dot {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: rgba(255,255,255,.82);
    position: relative;
    box-shadow: 0 8px 30px rgba(0,0,0,.24);
}
.play-dot::after {
    content: "";
    position: absolute;
    left: 28px;
    top: 21px;
    width: 0;
    height: 0;
    border-top: 13px solid transparent;
    border-bottom: 13px solid transparent;
    border-left: 19px solid var(--red-deep);
}
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.form-grid .wide { grid-column: 1 / -1; }
.site-footer {
    background: #24150d;
    color: #f3dfb8;
    margin-top: 2rem;
    padding: 2.2rem clamp(1rem, 4vw, 3rem);
    border-top: 1px solid rgba(229,200,123,.25);
}
.footer-grid {
    max-width: 1240px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 1.2rem;
}
.site-footer a { color: #ffe5a4; text-decoration: underline; text-underline-offset: 3px; }
.site-footer p { color: #dac59f; font-size: .95rem; }
.empty-result { display: none; margin-top: .8rem; color: var(--red-deep); font-weight: 800; }
@media (max-width: 980px) {
    .hero { grid-template-columns: 1fr; }
    .grid.cols-4, .grid.cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .search-panel { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
    .top-strip { display: none; }
    .nav-toggle { display: inline-flex; }
    .site-nav {
        display: none;
        position: absolute;
        left: 1rem;
        right: 1rem;
        top: 73px;
        flex-direction: column;
        align-items: stretch;
        background: rgba(36,21,13,.97);
        border: 1px solid rgba(229,200,123,.25);
        border-radius: 18px;
        padding: .65rem;
        box-shadow: var(--shadow);
    }
    .site-nav.open { display: flex; }
    .site-nav a { padding: .75rem .9rem; }
    .grid.cols-4, .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
    .search-panel, .form-grid { grid-template-columns: 1fr; }
    .archive-card { grid-template-columns: 1fr; }
    .archive-card img { width: 100%; height: 170px; }
    main { padding: 1rem; }
    h1 { letter-spacing: .03em; }
}

.mt-1 { margin-top: 1rem; }