:root {
    --bg: #0f1117;
    --panel: #1a1d26;
    --card: #1f2430;
    --border: rgba(255, 255, 255, 0.08);
    --text: #f4f4fb;
    --muted: rgba(244, 244, 251, 0.7);
    --accent: #48c9b0;
    font-family: "Roboto", "PingFang SC", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

.downriver-body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
}

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

.downriver-header {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.downriver-shell {
    width: min(1200px, 100% - 40px);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 0;
}

.downriver-logo {
    display: flex;
    flex-direction: column;
    font-weight: 600;
}

.downriver-logo span {
    font-size: 20px;
}

.downriver-logo small {
    font-size: 12px;
    color: var(--muted);
}

.downriver-nav {
    display: flex;
    gap: 12px;
    flex: 1;
}

.downriver-nav a {
    padding: 6px 12px;
    border-radius: 8px;
    color: var(--muted);
}

.downriver-nav a:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
}

.downriver-search {
    display: flex;
    gap: 6px;
}

.downriver-search input {
    border: 1px solid var(--border);
    border-radius: 8px;
    background: transparent;
    color: var(--text);
    padding: 6px 10px;
}

.downriver-search button {
    border: none;
    border-radius: 8px;
    background: var(--accent);
    color: #0f1117;
    padding: 6px 12px;
    cursor: pointer;
}

.downriver-main {
    padding: 30px 0 60px;
}

.downriver-section {
    width: min(1200px, 100% - 40px);
    margin: 0 auto 32px;
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.section-head h2 {
    margin: 0;
    font-size: 20px;
}

.section-head a {
    color: var(--accent);
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 18px;
}

.resource-card {
    background: var(--card);
    border-radius: 14px;
    border: 1px solid var(--border);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.resource-card h3 {
    margin: 0;
    font-size: 16px;
}

.resource-meta {
    font-size: 13px;
    color: var(--muted);
}

.resource-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 6px;
    padding: 4px 8px;
    margin-right: 6px;
}

.empty-state {
    border: 1px dashed var(--border);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    color: var(--muted);
}

.downriver-footer {
    background: var(--panel);
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 13px;
    text-align: center;
    padding: 16px 0;
}

.detail-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.player-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
}

#artplayer-container {
    width: 100%;
    aspect-ratio: 16/9;
    min-height: 240px;
    background: #04060c;
}

.source-list,
.episode-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 16px;
}

.source-btn,
.episode-btn {
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    padding: 4px 14px;
    cursor: pointer;
    transition: all .15s ease;
}

.source-btn:hover,
.episode-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.source-btn.active,
.episode-btn.active {
    background: var(--accent);
    color: #0f1117;
    border-color: var(--accent);
}