:root {
    color-scheme: light;
    --primary: #4f6ef7;
    --primary-dark: #3f5ce0;
    --bg: #f4f6fb;
    --card: #ffffff;
    --text: #1f2430;
    --muted: #8a90a0;
    --border: #e6e9f2;
    --surface: #f7f8fc;
    --topbar-bg: rgba(255, 255, 255, .85);
    --radius: 14px;
    --shadow: 0 6px 20px rgba(30, 50, 90, .06);
}

/* 浅色主题：手动强制（显式声明，避免被系统深色带偏） */
:root[data-theme="light"] {
    color-scheme: light;
    --primary: #4f6ef7;
    --primary-dark: #3f5ce0;
    --bg: #f4f6fb;
    --card: #ffffff;
    --text: #1f2430;
    --muted: #8a90a0;
    --border: #e6e9f2;
    --surface: #f7f8fc;
    --topbar-bg: rgba(255, 255, 255, .85);
    --shadow: 0 6px 20px rgba(30, 50, 90, .06);
}

/* 深色主题：手动强制 */
:root[data-theme="dark"] {
    color-scheme: dark;
    --primary: #6d85ff;
    --primary-dark: #5870ff;
    --bg: #0f131d;
    --card: #1a2031;
    --text: #e7eaf2;
    --muted: #8b93a7;
    --border: #2a3142;
    --surface: #232a3b;
    --topbar-bg: rgba(15, 19, 29, .85);
    --shadow: 0 6px 20px rgba(0, 0, 0, .35);
}

/* 深色主题：跟随系统（仅在未手动指定主题时生效） */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        color-scheme: dark;
        --primary: #6d85ff;
        --primary-dark: #5870ff;
        --bg: #0f131d;
        --card: #1a2031;
        --text: #e7eaf2;
        --muted: #8b93a7;
        --border: #2a3142;
        --surface: #232a3b;
        --topbar-bg: rgba(15, 19, 29, .85);
        --shadow: 0 6px 20px rgba(0, 0, 0, .35);
    }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* 顶部栏 */
.topbar {
    position: sticky; top: 0; z-index: 50;
    background: var(--topbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.topbar-inner { display: flex; align-items: center; gap: 16px; min-height: 60px; padding: 10px 0; }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-logo { height: 34px; width: auto; max-width: 140px; object-fit: contain; }
.brand-mark {
    width: 36px; height: 36px; border-radius: 10px;
    background: linear-gradient(135deg, #4f6ef7, #8b5cf6);
    color: #fff; font-weight: 700; font-size: 18px;
    display: flex; align-items: center; justify-content: center;
}
.brand-name { font-size: 17px; font-weight: 700; white-space: nowrap; }
.search { position: relative; flex: 1; max-width: 500px; }
.search-bar { position: relative; }
.search-bar input {
    width: 100%; height: 40px; border: 1px solid var(--border); border-radius: 10px;
    padding: 0 76px 0 38px; font-size: 14px; outline: none; background: var(--card);
}
.search-bar input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 110, 247, .12); }
.search-icon { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); opacity: .5; font-size: 14px; pointer-events: none; }
.search-btn {
    position: absolute; right: 5px; top: 50%; transform: translateY(-50%);
    height: 30px; padding: 0 15px; border: 0; border-radius: 8px;
    background: var(--primary); color: #fff; font-size: 13px; font-weight: 600; cursor: pointer;
}
.search-btn:hover { background: var(--primary-dark); }
.search-engines { display: flex; align-items: center; gap: 6px; margin-top: 8px; }
.eng {
    height: 26px; padding: 0 12px; border: 0; border-radius: 999px;
    background: var(--surface); color: var(--muted); font-size: 13px; cursor: pointer; transition: .15s;
}
.eng:hover { color: var(--primary); }
.eng.active { background: var(--primary); color: #fff; }
.search-suggest {
    position: absolute; top: calc(100% + 6px); left: 0; right: 0;
    background: var(--card); border: 1px solid var(--border); border-radius: 12px;
    box-shadow: var(--shadow); z-index: 60; max-height: 340px; overflow-y: auto; padding: 6px;
}
.search-suggest .sug-search {
    display: block; width: 100%; padding: 9px 10px; margin-bottom: 4px;
    border: 0; border-radius: 8px; text-align: left; font: inherit; font-size: 14px;
    color: var(--primary); cursor: pointer; background: rgba(79, 110, 247, .08);
}
.search-suggest .sug-search:hover { background: rgba(79, 110, 247, .14); }
.search-suggest [data-suggest-item].active { background: var(--surface); outline: 2px solid rgba(79, 110, 247, .2); }
.search-suggest .sug-item {
    display: flex; align-items: center; gap: 9px; padding: 9px 10px;
    border-radius: 8px; font-size: 14px; color: var(--text);
}
.search-suggest .sug-item:hover { background: var(--surface); }
.search-suggest .sug-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.search-suggest .sug-name { font-weight: 600; white-space: nowrap; }
.search-suggest .sug-url { margin-left: auto; color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 45%; }
.topbar-actions { margin-left: auto; flex-shrink: 0; display: flex; align-items: center; gap: 6px; }
.btn {
    display: inline-flex; align-items: center; gap: 6px; height: 38px;
    padding: 0 16px; border-radius: 10px; font-size: 14px; font-weight: 600;
    border: 1px solid var(--border); background: var(--card); cursor: pointer; transition: .15s;
    color: var(--text);
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--primary); border-color: transparent; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }

/* 热门推荐 */
.hot { margin-top: 18px; }
.hot-title { font-size: 14px; font-weight: 600; color: var(--muted); margin-bottom: 10px; }
.hot-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px; background: var(--card); border: 1px solid var(--border);
    border-radius: 999px; font-size: 13px; transition: .15s;
}
.chip:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--shadow); }
.chip-dot { width: 8px; height: 8px; border-radius: 50%; }

/* 内容 */
.cat-nav {
    border-top: 1px solid var(--border);
}
.cat-nav-inner {
    display: flex; gap: 6px; overflow-x: auto; padding: 8px 0;
    scrollbar-width: none; -ms-overflow-style: none;
}
.cat-nav-inner::-webkit-scrollbar { display: none; }
.cat-nav a {
    flex-shrink: 0; height: 30px; padding: 0 12px; border-radius: 999px;
    display: inline-flex; align-items: center;
    font-size: 13px; font-weight: 600; color: var(--muted);
    border: 1px solid transparent;
}
.cat-nav a:hover { color: var(--primary); background: var(--card); }
.cat-nav a.active {
    color: var(--primary); background: var(--card);
    border-color: var(--border); box-shadow: var(--shadow);
}
.category { scroll-margin-top: 140px; }

.content { padding: 8px 16px 40px; }
.no-result { text-align: center; color: var(--muted); padding: 40px 0; font-size: 15px; }

.category { margin-top: 28px; }
.quick-category[hidden] { display: none; }
.cat-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cat-title { font-size: 17px; font-weight: 700; margin: 0; display: flex; align-items: center; gap: 8px; }
.cat-ico { font-size: 18px; }
.cat-count { font-size: 13px; color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.site-card { position: relative; min-width: 0; }
.site {
    display: flex; align-items: center; gap: 11px;
    min-height: 60px; padding: 11px 42px 11px 13px; background: var(--card); border: 1px solid var(--border);
    border-radius: 12px; transition: .15s; overflow: hidden;
}
.site:hover {
    border-color: rgba(79, 110, 247, .5);
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}
.favorite-btn {
    position: absolute; top: 50%; right: 8px; z-index: 2; transform: translateY(-50%);
    width: 30px; height: 30px; padding: 0; border: 0; border-radius: 9px;
    background: transparent; color: var(--muted); font-size: 20px; line-height: 1;
    cursor: pointer; opacity: .65; transition: .15s;
}
.site-card:hover .favorite-btn, .favorite-btn:focus-visible, .favorite-btn.active { opacity: 1; }
.favorite-btn:hover { color: #f59e0b; background: var(--surface); }
.favorite-btn.active { color: #f59e0b; }
.text-btn {
    padding: 4px 8px; border: 0; background: transparent; color: var(--muted);
    font-size: 13px; cursor: pointer;
}
.text-btn:hover { color: var(--primary); }
.favicon {
    width: 36px; height: 36px; border-radius: 9px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 16px;
    position: relative; overflow: hidden;
}
.favicon-img {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    object-fit: contain; padding: 5px; border-radius: 9px;
    background: var(--surface);
    image-rendering: auto;
}
.favicon-img.favicon-fail { display: none; }
.favicon-text { position: relative; z-index: 1; }
.favicon-img:not(.favicon-fail) ~ .favicon-text { display: none; }
.site-info { display: flex; flex-direction: column; min-width: 0; }
.site-name { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.site-desc { font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* 页脚 */
.footer { border-top: 1px solid var(--border); background: var(--card); margin-top: 30px; padding: 24px 0 30px; }
.flink { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 12px; }
.flink a { font-size: 13px; color: var(--muted); }
.flink a:hover { color: var(--primary); }
.copyright { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; font-size: 13px; color: var(--muted); }
.copyright a { color: var(--muted); }
.copyright a:hover { color: var(--primary); }

/* 主题切换按钮 */
.theme-toggle { width: 38px; padding: 0; justify-content: center; font-size: 16px; }
body { transition: background-color .25s ease, color .25s ease; }

/* 响应式：手机 */
@media (max-width: 640px) {
    .topbar-inner { flex-wrap: wrap; height: auto; padding: 7px 0; gap: 7px; }
    .search { order: 3; flex-basis: 100%; max-width: none; }
    .brand-logo { height: 30px; max-width: 104px; }
    .brand-name { display: none; }
    .topbar-actions .btn { height: 34px; padding: 0 9px; font-size: 13px; }
    .theme-toggle { width: 34px; }
    .search-engines { margin-top: 6px; }
    .cat-nav-inner { padding: 6px 0; }
    .cat-nav a { height: 28px; padding: 0 10px; font-size: 12px; }
    .grid { grid-template-columns: repeat(2, 1fr); }
    .site-name { font-size: 13px; }
    .site-desc { display: none; }
    .site { min-height: 52px; padding: 9px 34px 9px 9px; }
    .favorite-btn { right: 4px; width: 28px; height: 28px; font-size: 18px; }
    .favicon { width: 32px; height: 32px; font-size: 14px; }
}