:root {
    --ink: #2c1f16;
    --ink-soft: #675545;
    --paper-top: #f8f1e2;
    --paper-bottom: #e8d5b2;
    --paper-panel: rgba(255, 247, 232, 0.86);
    --line: rgba(102, 70, 42, 0.22);
    --shadow: 0 14px 34px rgba(64, 38, 18, 0.15);
    --accent: #8a3f1f;
    --accent-strong: #6d2f14;
    --hero-image: url("../Photo/展子虔游春图卷.jpg");
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

.detail-body {
    min-height: 100vh;
    color: var(--ink);
    font-family: "STKaiti", "KaiTi", "SimSun", serif;
    background:
        radial-gradient(circle at 85% 8%, rgba(129, 84, 46, 0.22) 0, transparent 38%),
        radial-gradient(circle at 10% 16%, rgba(167, 112, 70, 0.18) 0, transparent 38%),
        linear-gradient(180deg, var(--paper-top) 0%, var(--paper-bottom) 100%);
    position: relative;
}

.detail-body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: repeating-linear-gradient(
        90deg,
        transparent 0,
        transparent 36px,
        rgba(111, 77, 49, 0.05) 37px
    );
    opacity: 0.18;
}

.detail-shell {
    width: min(1100px, calc(100% - 2rem));
    margin: 1.1rem auto 2.2rem;
    position: relative;
    z-index: 1;
}

.detail-top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1rem;
    border-radius: 16px;
    border: 1px solid var(--line);
    background: var(--paper-panel);
    backdrop-filter: blur(6px);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0.8rem;
    z-index: 8;
}

.back-link {
    padding: 0.42rem 0.88rem;
    border-radius: 999px;
    color: #fff7e8;
    background: linear-gradient(120deg, var(--accent-strong) 0%, var(--accent) 100%);
}

.dynasty-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.dynasty-nav a {
    padding: 0.35rem 0.74rem;
    border-radius: 999px;
    border: 1px solid rgba(95, 66, 41, 0.25);
    color: #4b3422;
    background: rgba(255, 245, 226, 0.72);
    transition: all 0.24s ease;
}

.dynasty-nav a:hover {
    transform: translateY(-2px);
    border-color: rgba(95, 66, 41, 0.4);
}

.dynasty-nav .is-active {
    color: #fff8ef;
    border-color: transparent;
    background: linear-gradient(120deg, var(--accent-strong) 0%, var(--accent) 100%);
}

.hero {
    margin-top: 1rem;
    border-radius: 24px;
    padding: clamp(1.2rem, 3vw, 2.3rem);
    position: relative;
    overflow: hidden;
    color: #f6efe2;
    background:
        linear-gradient(115deg, rgba(52, 31, 18, 0.92) 0%, rgba(88, 46, 23, 0.88) 52%, rgba(43, 28, 17, 0.9) 100%),
        var(--hero-image) center/cover no-repeat;
    box-shadow: var(--shadow);
    animation: panel-rise 0.75s ease both;
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    border: 1px solid rgba(255, 233, 205, 0.28);
    border-radius: 24px;
    pointer-events: none;
}

.hero-kicker {
    font-size: 0.86rem;
    letter-spacing: 0.16em;
    opacity: 0.86;
}

.hero h1 {
    margin-top: 0.2rem;
    margin-bottom: 0.7rem;
    font-size: clamp(1.9rem, 4vw, 3.1rem);
    letter-spacing: 0.06em;
}

.hero-intro {
    line-height: 1.72;
    max-width: 62ch;
}

.hero-tags {
    margin-top: 0.85rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.hero-tags span {
    border-radius: 999px;
    padding: 0.32rem 0.72rem;
    border: 1px solid rgba(255, 228, 195, 0.32);
    background: rgba(255, 241, 221, 0.08);
}

.section {
    margin-top: 1rem;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: var(--paper-panel);
    box-shadow: var(--shadow);
    padding: 1rem;
    animation: panel-rise 0.8s ease both;
}

.section h2 {
    color: var(--accent-strong);
    font-size: 1.42rem;
    margin-bottom: 0.7rem;
    padding-bottom: 0.45rem;
    border-bottom: 1px solid rgba(119, 80, 49, 0.2);
}

.fact-grid {
    display: grid;
    gap: 0.7rem;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.fact-card {
    border-radius: 14px;
    border: 1px solid rgba(122, 84, 54, 0.2);
    background: rgba(255, 250, 239, 0.86);
    padding: 0.78rem;
}

.fact-card h3 {
    color: var(--accent);
    font-size: 1.1rem;
    margin-bottom: 0.35rem;
}

.fact-card p {
    line-height: 1.6;
    color: #4e392a;
}

.panel-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
}

.panel {
    border-radius: 14px;
    border: 1px solid rgba(121, 83, 55, 0.22);
    background: rgba(255, 250, 239, 0.85);
    padding: 0.85rem;
}

.panel h3 {
    color: var(--accent);
    font-size: 1.16rem;
    margin-bottom: 0.5rem;
}

.point-list {
    list-style: none;
    display: grid;
    gap: 0.45rem;
}

.point-list li {
    line-height: 1.62;
    color: #463223;
    padding-left: 0.82rem;
    position: relative;
}

.point-list li::before {
    content: "·";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

.timeline {
    list-style: none;
    display: grid;
    gap: 0.55rem;
}

.timeline li {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 0.6rem;
    align-items: start;
    border-radius: 12px;
    border: 1px solid rgba(122, 83, 53, 0.16);
    background: rgba(255, 250, 241, 0.86);
    padding: 0.65rem 0.75rem;
}

.timeline .year {
    color: var(--accent);
    font-weight: 700;
    font-size: 1.03rem;
}

.timeline p {
    color: #473324;
    line-height: 1.6;
}

.person-grid {
    display: grid;
    gap: 0.7rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.person-card {
    border-radius: 12px;
    border: 1px solid rgba(122, 84, 54, 0.2);
    background: rgba(255, 251, 243, 0.88);
    padding: 0.72rem;
}

.person-card h3 {
    color: var(--accent);
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.person-card p {
    line-height: 1.62;
    color: #463424;
}

.knowledge-list {
    margin-left: 1.1rem;
    display: grid;
    gap: 0.4rem;
    color: #463323;
}

.knowledge-list li {
    line-height: 1.66;
}

.closing-note {
    margin-top: 0.8rem;
    border-left: 4px solid var(--accent);
    background: rgba(255, 250, 241, 0.86);
    color: #50392a;
    border-radius: 10px;
    padding: 0.7rem 0.8rem;
    line-height: 1.65;
}

.detail-footer {
    margin-top: 0.95rem;
    text-align: center;
    color: #5e4a39;
}

.theme-tang {
    --accent: #d05724;
    --accent-strong: #932f16;
    --hero-image: url("../Photo/阎立本步辇图卷.png");
}

.theme-song {
    --accent: #2f6b4f;
    --accent-strong: #1f4f3a;
    --hero-image: url("../Photo/王希孟千里江山卷.png");
}

.theme-yuan {
    --accent: #2e5886;
    --accent-strong: #1d3f64;
    --hero-image: url("../Photo/黄公望富春山居图.png");
}

.theme-ming {
    --accent: #c78f17;
    --accent-strong: #8b6210;
    --hero-image: url("../Photo/仇英汉宫春晓图.jpg");
}

.theme-qing {
    --accent: #8743de;
    --accent-strong: #6331a8;
    --hero-image: url("../Photo/郎世宁百骏图.jpg");
}

@keyframes panel-rise {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 960px) {
    .detail-top {
        position: static;
    }

    .panel-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .detail-shell {
        width: calc(100% - 1rem);
        margin-top: 0.55rem;
    }

    .timeline li {
        grid-template-columns: 1fr;
        gap: 0.3rem;
    }
}