/* 觅知放映厅 · 静态页（教程 / 弹幕礼仪） */
:root {
    --bg: #07080a;
    --text: #f2f1ee;
    --text-2: #c7c8c4;
    --muted: #8c9098;
    --muted-2: #6a6f77;
    --line: rgba(255, 255, 255, .09);
    --line-2: rgba(255, 255, 255, .16);
    --accent: #e8b76a;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        radial-gradient(100% 80% at 80% -10%, rgba(232, 183, 106, .1), transparent 58%),
        url("../img/bg.jpg") center / cover no-repeat;
    opacity: .45;
}
body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: linear-gradient(180deg, rgba(7, 8, 10, .6), rgba(7, 8, 10, .9) 60%, #07080a);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
code { font-family: var(--mono); }

.site-head {
    height: 66px;
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 0 clamp(18px, 5vw, 56px);
    border-bottom: 1px solid var(--line);
    background: rgba(7, 8, 10, .5);
    backdrop-filter: blur(12px);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { width: 30px; height: 30px; }
.brand b { font-weight: 500; font-size: 13px; letter-spacing: .02em; }
.head-right { margin-left: auto; display: flex; gap: 18px; font-size: 11.5px; color: var(--muted); }
.head-right a:hover { color: var(--accent); }

.wrap { max-width: 840px; margin: 0 auto; padding: clamp(30px, 6vw, 64px) 22px 80px; }
.eyebrow {
    margin: 0 0 10px;
    font-size: 9.5px;
    letter-spacing: .24em;
    text-transform: uppercase;
    color: var(--muted-2);
    font-weight: 600;
}
h1 { margin: 0 0 14px; font-size: clamp(30px, 4.4vw, 44px); font-weight: 500; letter-spacing: -.025em; line-height: 1.22; }
.lead { margin: 0 0 34px; color: var(--muted); font-size: 13.5px; max-width: 600px; line-height: 1.9; }
h2 {
    margin: 42px 0 12px;
    padding-top: 26px;
    border-top: 1px solid var(--line);
    font-size: 19px;
    font-weight: 500;
    letter-spacing: -.01em;
}
h3 { margin: 22px 0 6px; font-size: 14px; font-weight: 600; }
p { margin: 0 0 12px; color: var(--text-2); font-size: 13px; }
p code, li code, td code {
    background: rgba(232, 183, 106, .1);
    color: var(--accent);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 11.5px;
}
ol, ul { margin: 0 0 14px; padding-left: 20px; color: var(--text-2); font-size: 13px; }
li { margin: 6px 0; }

.code-block { margin: 14px 0; background: #121419; border: 1px solid rgba(255, 255, 255, .07); border-radius: 10px; overflow: hidden; }
.code-block__head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 13px;
    background: rgba(255, 255, 255, .03);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: .1em;
    color: var(--muted-2);
}
.code-block__head button {
    border: 0; background: rgba(255, 255, 255, .07); color: var(--muted);
    border-radius: 5px; padding: 3px 9px; font-size: 10.5px; cursor: pointer;
}
.code-block__head button:hover { background: rgba(232, 183, 106, .18); color: var(--accent); }
pre {
    margin: 0; padding: 14px 16px; overflow: auto;
    font-family: var(--mono); font-size: 11.5px; line-height: 1.8; color: #d9d9d3;
}

.note {
    margin: 16px 0;
    padding: 12px 15px;
    border: 1px solid rgba(232, 183, 106, .22);
    background: rgba(232, 183, 106, .06);
    border-radius: 8px;
    font-size: 12px;
    color: #d8c39b;
    line-height: 1.8;
}

.rules { counter-reset: r; list-style: none; padding: 0; margin: 20px 0; }
.rules li {
    counter-increment: r;
    position: relative;
    padding: 14px 0 14px 46px;
    border-bottom: 1px solid var(--line);
    color: var(--text-2);
    font-size: 13px;
}
.rules li::before {
    content: counter(r, decimal-leading-zero);
    position: absolute; left: 0; top: 15px;
    font-family: var(--mono); font-size: 10px; color: var(--accent);
    border: 1px solid rgba(232, 183, 106, .3);
    border-radius: 50%;
    width: 26px; height: 26px;
    display: grid; place-items: center;
}
.rules li b { color: var(--text); font-weight: 500; display: block; margin-bottom: 2px; }

.site-foot {
    border-top: 1px solid var(--line);
    padding: 22px clamp(18px, 5vw, 56px);
    font-size: 11px;
    color: var(--muted-2);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}
.site-foot a:hover { color: var(--accent); }
.dot { width: 3px; height: 3px; border-radius: 50%; background: var(--muted-2); }

@media (max-width: 640px) {
    .site-head { height: 56px; padding: 0 16px; }
    .head-right { gap: 12px; font-size: 11px; }
    .wrap { padding: 26px 16px 60px; }
    h2 { margin-top: 32px; }
}