:root {
    color-scheme: light dark;

    /* 黑白灰 */
    --bg: #f5f5f7;
    --bg2: #ffffff;
    --card: #ffffff;
    --card2: #f0f0f0;
    --border: #e5e5ea;
    --text: #1d1d1f;
    --muted: #6e6e73;
    --accent: #1d1d1f;
    --accent2: #1d1d1f;
    --on-accent: #ffffff;
    --code-bg: #f5f5f7;
    --code-text: #1d1d1f;

    /* 语义色(仅状态徽章/成功错误提示/评价标签) */
    --green: #34c759;
    --red: #ff3b30;
    --warning: #f5a623;

    --overlay: rgba(0, 0, 0, .4);
    --nav-bg: rgba(245, 245, 247, .8);

    --radius: 14px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0a0a0a;
        --bg2: #1c1c1e;
        --card: #1c1c1e;
        --card2: #2c2c2e;
        --border: #2c2c2e;
        --text: #f5f5f7;
        --muted: #98989d;
        --accent: #f5f5f7;
        --accent2: #f5f5f7;
        --on-accent: #1d1d1f;
        --code-bg: #0a0a0a;
        --code-text: #e5e5e7;
        --green: #30d158;
        --red: #ff453a;
        --overlay: rgba(0, 0, 0, .6);
        --nav-bg: rgba(10, 10, 10, .8);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

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

/* 导航栏 */
#nav {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    gap: 28px;
}
.brand {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -.3px;
    color: var(--text);
}
#nav nav { display: flex; gap: 22px; }
#nav nav a { color: var(--muted); font-size: 15px; transition: color .15s; }
#nav nav a:hover { color: var(--text); }
#nav nav a.nav-cta { color: var(--on-accent); }
#nav nav a.nav-cta:hover { color: var(--on-accent); opacity: .9; }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.nav-right a { color: var(--muted); font-size: 15px; }
.nav-right a:hover { color: var(--text); }
.nav-toggle {
    display: none;
    margin-left: auto;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 8px;
    padding: 6px 11px;
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
}

/* 布局 */
.container { max-width: 1080px; margin: 0 auto; padding: 40px 24px 80px; }
h1 { font-size: 30px; font-weight: 600; letter-spacing: -.4px; }
.sub { color: var(--muted); margin-top: 8px; font-size: 15px; }

/* 按钮 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 10px;
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    background: var(--accent);
    color: var(--on-accent);
    transition: transform .12s, opacity .12s;
}
.btn:hover { opacity: .9; transform: translateY(-1px); }
.btn.ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn.ghost:hover { opacity: 1; border-color: var(--muted); }
.btn.danger { background: transparent; border-color: var(--red); color: var(--red); }
.btn.danger:hover { background: var(--red); color: #fff; }
.btn.sm { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.btn:disabled { opacity: .4; cursor: not-allowed; }

/* 表单 */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}
.form { max-width: 420px; margin: 40px auto; }
.form h2 { margin-bottom: 20px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 6px; }
.field input, .field textarea, .field select {
    width: 100%;
    padding: 11px 13px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg2);
    color: var(--text);
    font-size: 15px;
    outline: none;
}
.field input:focus, .field textarea:focus { border-color: var(--muted); }
.field textarea { resize: vertical; min-height: 90px; font-family: ui-monospace, Consolas, monospace; }
.hint { font-size: 13px; color: var(--muted); margin-top: 6px; }
.error { color: var(--red); font-size: 14px; margin-top: 12px; min-height: 20px; }
.success { color: var(--green); font-size: 14px; margin-top: 12px; min-height: 20px; }

/* 首页 hero */
.hero { text-align: center; padding: 70px 20px 40px; }
.hero h1 { font-size: 44px; line-height: 1.2; letter-spacing: -.8px; }
.hero .grad { color: var(--text); }
.hero p { color: var(--muted); font-size: 18px; margin: 18px auto 30px; max-width: 560px; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 50px; }
.feature { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.feature h3 { font-size: 17px; margin-bottom: 8px; }
.feature p { color: var(--muted); font-size: 14px; }

/* 商店卡片 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; margin-top: 28px; }
.shop-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; gap: 10px; }
.shop-card h3 { font-size: 18px; }
.shop-card p { color: var(--muted); font-size: 14px; flex: 1; }
.shop-card .price { font-size: 22px; font-weight: 700; color: var(--text); }
.shop-card .row { display: flex; align-items: center; justify-content: space-between; }

/* 我的脚本 / 后台表格 */
.list { display: flex; flex-direction: column; gap: 14px; margin-top: 24px; }
.item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.item .top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.item h3 { font-size: 17px; }
.badge { font-size: 12px; padding: 3px 10px; border-radius: 999px; background: var(--bg2); color: var(--muted); border: 1px solid var(--border); }
.badge.on { background: transparent; color: var(--green); border-color: var(--green); }
.badge.off { background: transparent; color: var(--red); border-color: var(--red); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
tr:hover td { background: var(--card2); }

.empty { color: var(--muted); text-align: center; padding: 50px 0; }
.muted { color: var(--muted); font-size: 13px; }

/* 代码块 / 等宽代码(共享) */
.dl-row { display: flex; align-items: center; gap: 8px; }
.dl-label { flex: 0 0 auto; color: var(--text); font-size: 13px; }
.dl-code {
    flex: 1;
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 12px;
    color: var(--code-text);
    word-break: break-all;
    white-space: pre-wrap;
}
.copy-btn { flex: 0 0 auto; }
.code { font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace; color: var(--code-text); }

/* 后台布局 */
.admin-layout { display: grid; grid-template-columns: 300px 1fr; gap: 20px; margin-top: 28px; align-items: start; }
.panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.panel h3 { margin-bottom: 14px; font-size: 16px; }
.side-list { display: flex; flex-direction: column; gap: 8px; }
.side-list button {
    text-align: left;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: var(--bg2);
    color: var(--text);
    cursor: pointer;
    font-size: 14px;
}
.side-list button.active { border-color: var(--accent); background: var(--card2); }

@media (max-width: 820px) {
    /* 布局 */
    .features { grid-template-columns: 1fr; }
    .admin-layout { grid-template-columns: 1fr; }
    .container { padding: 28px 16px 64px; }
    .hero { padding: 44px 16px 28px; }
    .hero h1 { font-size: 30px; }
    .hero p { font-size: 16px; }
    .card { padding: 20px; }

    /* 导航:汉堡菜单 */
    .nav-inner { gap: 14px; padding: 12px 16px; flex-wrap: wrap; }
    .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
    #nav nav { display: none; }
    #nav .nav-right { display: none; }
    #nav.nav-open nav,
    #nav.nav-open .nav-right { display: flex; }
    #nav.nav-open nav { flex-direction: column; gap: 4px; width: 100%; padding-top: 6px; }
    #nav.nav-open nav a { padding: 8px 0; font-size: 16px; }
    #nav.nav-open .nav-right {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        width: 100%;
        margin-left: 0;
        padding-top: 8px;
        border-top: 1px solid var(--border);
    }
    #nav.nav-open .nav-right a { padding: 8px 0; font-size: 16px; }

    /* 后台表格横向滚动 */
    .panel { overflow-x: auto; }
    .panel table { white-space: nowrap; }
}

/* AI 智能客服悬浮窗 */
.chat-fab {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 9990;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--on-accent);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 24px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, .18);
    transition: transform .12s, opacity .12s;
}
.chat-fab:hover { opacity: .9; transform: translateY(-2px); }
.chat-panel {
    position: fixed;
    right: 20px;
    bottom: 84px;
    z-index: 9990;
    width: min(360px, calc(100vw - 40px));
    height: min(480px, calc(100vh - 120px));
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: none;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0, 0, 0, .25);
}
.chat-panel.open { display: flex; }
.chat-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    font-weight: 600;
    font-size: 14px;
}
.chat-head .x { cursor: pointer; color: var(--muted); font-size: 22px; line-height: 1; }
.chat-msgs {
    flex: 1;
    overflow-y: auto;
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.chat-msg {
    max-width: 84%;
    padding: 9px 12px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.55;
    white-space: pre-wrap;
    word-break: break-word;
}
.chat-msg.user { align-self: flex-end; background: var(--accent); color: var(--on-accent); border-bottom-right-radius: 4px; }
.chat-msg.bot { align-self: flex-start; background: var(--bg2); color: var(--text); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.chat-msg.err { align-self: flex-start; background: transparent; color: var(--red); }
.chat-input {
    display: flex;
    gap: 8px;
    padding: 12px;
    border-top: 1px solid var(--border);
}
.chat-input input {
    flex: 1;
    padding: 9px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg2);
    color: var(--text);
    font-size: 14px;
    outline: none;
}
.chat-input input:focus { border-color: var(--muted); }