:root {
        --bg: #07111f;
        --bg-2: #09182b;
        --panel: rgba(15, 26, 46, 0.92);
        --panel-soft: #13233e;
        --line: rgba(255,255,255,.08);
        --line-strong: rgba(90,169,255,.28);
        --text: #eef4ff;
        --muted: #9cafcf;
        --accent: #66b0ff;
        --accent-2: #8ec5ff;
        --success: #35d27b;
        --mark: #ffe08a;
        --shadow: 0 12px 30px rgba(0,0,0,.22);
        --safe-top: env(safe-area-inset-top, 0px);
        --safe-bottom: env(safe-area-inset-bottom, 0px);
    }
    * { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
    html, body { margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
        background:
            radial-gradient(circle at top right, rgba(102,176,255,.12), transparent 26%),
            linear-gradient(180deg, #05101d 0%, #08172d 100%);
        color: var(--text);
        min-height: 100vh;
    }
    a { color: inherit; }
    .wrap {
        max-width: 980px;
        margin: 0 auto;
        padding: calc(16px + var(--safe-top)) 12px calc(40px + var(--safe-bottom));
    }
    .hero, .card {
        background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
        border: 1px solid var(--line);
        border-radius: 20px;
        box-shadow: var(--shadow);
        backdrop-filter: blur(8px);
    }
    .hero {
        padding: 22px 18px 18px;
        position: relative;
        overflow: hidden;
    }
    .hero::after {
        content: "";
        position: absolute;
        inset: auto -40px -50px auto;
        width: 180px;
        height: 180px;
        background: radial-gradient(circle, rgba(102,176,255,.16), transparent 68%);
        pointer-events: none;
    }
    .title-row {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-wrap: wrap;
        position: relative;
        z-index: 1;
    }
    h1 {
        margin: 0;
        font-size: 30px;
        line-height: 1.1;
        letter-spacing: .6px;
        font-weight: 900;
        display: inline-flex;
        align-items: center;
        gap: 10px;
        text-shadow: 0 6px 18px rgba(0,0,0,.24);
    }
    .title-mark {
        width: 8px;
        height: 30px;
        border-radius: 999px;
        background: linear-gradient(180deg, var(--accent-2), #4d9fff);
        box-shadow: 0 0 18px rgba(102,176,255,.35);
    }
    .title-badge {
        display: inline-flex;
        align-items: center;
        height: 28px;
        padding: 0 12px;
        border-radius: 999px;
        border: 1px solid rgba(142,197,255,.18);
        background: rgba(102,176,255,.10);
        color: #dcecff;
        font-size: 13px;
        font-weight: 700;
    }
    .hero-stats {
        margin-top: 18px;
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .hero-stats .tag {
        background: rgba(255,255,255,.05);
    }
    .search-dock-anchor {
        margin-top: 0;
    }
    .search-dock {
        position: -webkit-sticky;
        position: sticky;
        top: calc(var(--safe-top) + 10px);
        z-index: 999;
        padding: 10px;
        border-radius: 18px;
        background: rgba(9,24,43,.82);
        border: 1px solid rgba(142,197,255,.16);
        box-shadow: 0 16px 40px rgba(0,0,0,.22);
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
        transition: box-shadow .2s ease, border-color .2s ease, background .2s ease, transform .22s ease, opacity .2s ease;
        will-change: transform;
    }
    .search-dock.is-floating {
        border-color: rgba(142,197,255,.24);
        box-shadow: 0 16px 40px rgba(0,0,0,.34);
        background: rgba(9,24,43,.92);
    }
    .search-dock.is-fixed {
        position: fixed !important;
        top: calc(var(--safe-top) + 6px);
        left: 10px;
        right: 10px;
        width: auto !important;
        z-index: 10050;
        transform: translate3d(0, 0, 0);
        -webkit-transform: translate3d(0, 0, 0);
        background: rgba(7,17,31,.97);
        box-shadow: 0 14px 32px rgba(0,0,0,.4);
        border-color: rgba(142,197,255,.28);
    }
    /* 下滑阅读时收起悬浮条，避免挡题（手表/小屏） */
    .search-dock.is-fixed.is-hidden {
        transform: translate3d(0, calc(-100% - 16px), 0);
        -webkit-transform: translate3d(0, calc(-100% - 16px), 0);
        opacity: 0.15;
        pointer-events: none;
    }
    .search-dock.is-fixed.is-compact {
        padding: 6px 8px;
        border-radius: 12px;
    }
    .search-dock.is-fixed.is-compact input[type="text"],
    .search-dock.is-fixed.is-compact input[type="search"],
    .search-dock.is-fixed.is-compact select,
    .search-dock.is-fixed.is-compact button.search-btn {
        height: 36px;
        font-size: 13px;
        border-radius: 10px;
    }

    /* 桌面：输入 | 分类 | 搜索 */
    form.search-box {
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(140px, 220px) 96px;
        gap: 10px;
        align-items: stretch;
        width: 100%;
        margin: 0;
    }
    .input-wrap,
    .select-wrap {
        position: relative;
        min-width: 0;
        width: 100%;
    }
    .input-wrap { grid-column: 1; grid-row: 1; }
    .select-wrap { grid-column: 2; grid-row: 1; }
    button.search-btn { grid-column: 3; grid-row: 1; }

    .search-box input[type="text"],
    .search-box input[type="search"],
    .search-box select {
        display: block;
        width: 100%;
        max-width: 100%;
        height: 50px;
        border-radius: 14px;
        border: 1px solid var(--line);
        background: rgba(255,255,255,.06);
        color: var(--text);
        padding: 0 42px 0 14px;
        margin: 0;
        outline: none;
        font-size: 15px;
        line-height: 50px;
        font-family: inherit;
        -webkit-appearance: none;
        appearance: none;
        transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
    }
    /* 去掉 search 类型自带清除钮，避免与自定义 × 叠在一起 */
    .search-box input[type="search"]::-webkit-search-decoration,
    .search-box input[type="search"]::-webkit-search-cancel-button,
    .search-box input[type="search"]::-webkit-search-results-button,
    .search-box input[type="search"]::-webkit-search-results-decoration {
        -webkit-appearance: none;
        appearance: none;
        display: none;
    }
    .search-box select {
        padding-right: 36px;
        cursor: pointer;
        text-overflow: ellipsis;
        white-space: nowrap;
        overflow: hidden;
    }
    .select-icon {
        position: absolute;
        right: 12px;
        top: 50%;
        transform: translateY(-52%);
        font-size: 14px;
        color: #aac6ee;
        pointer-events: none;
        line-height: 1;
    }
    .search-box input::placeholder {
        color: #8ea5cb;
        opacity: 1;
    }
    .search-box input:focus,
    .search-box select:focus {
        border-color: var(--line-strong);
        box-shadow: 0 0 0 4px rgba(90,169,255,.12);
        background: rgba(255,255,255,.09);
    }
    .search-box select option {
        color: #111;
        background: #fff;
    }
    button.search-btn {
        height: 50px;
        min-width: 88px;
        border: 0;
        border-radius: 14px;
        background: linear-gradient(180deg, var(--accent-2), var(--accent));
        color: #061120;
        font-size: 15px;
        font-weight: 800;
        font-family: inherit;
        cursor: pointer;
        white-space: nowrap;
        transition: transform .15s ease, filter .15s ease, opacity .15s ease;
        box-shadow: 0 10px 18px rgba(102,176,255,.18);
    }
    .top-btn {
        height: 50px;
        border: 0;
        border-radius: 14px;
        background: linear-gradient(180deg, var(--accent-2), var(--accent));
        color: #061120;
        font-size: 15px;
        font-weight: 800;
        cursor: pointer;
        transition: transform .15s ease, filter .15s ease, opacity .15s ease;
        box-shadow: 0 10px 18px rgba(102,176,255,.18);
    }
    button.search-btn:hover,
    .top-btn:hover { filter: brightness(1.04); }
    button.search-btn:active,
    .top-btn:active { transform: translateY(1px) scale(.99); }
    button.search-btn[disabled] { opacity: .75; cursor: wait; }
    .clear-btn {
        position: absolute;
        right: 8px;
        top: 50%;
        transform: translateY(-50%);
        width: 28px;
        height: 28px;
        border: 0;
        border-radius: 999px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        background: rgba(255,255,255,.12);
        color: #dceaff;
        font-size: 16px;
        font-weight: 700;
        cursor: pointer;
        opacity: 0;
        pointer-events: none;
        z-index: 2;
        transition: opacity .18s ease, transform .18s ease, background .18s ease;
    }
    .clear-btn.is-visible {
        opacity: 1;
        pointer-events: auto;
    }
    .clear-btn:active {
        transform: translateY(-50%) scale(.96);
        background: rgba(255,255,255,.18);
    }
    .search-box:focus-within .input-wrap input,
    .search-box:focus-within .select-wrap select {
        border-color: rgba(142,197,255,.28);
    }
    .toolbar {
        margin: 16px 0 8px;
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        color: var(--muted);
        font-size: 13px;
    }
    .tag, .pill {
        display: inline-flex;
        align-items: center;
        padding: 7px 11px;
        border-radius: 999px;
        border: 1px solid var(--line);
        background: rgba(255,255,255,.04);
        line-height: 1;
    }
    .tag.highlight {
        border-color: rgba(90,169,255,.24);
        background: rgba(90,169,255,.12);
        color: #d9ecff;
    }
    .toolbar a.tag {
        text-decoration: none;
    }
    .list {
        margin-top: 12px;
        display: grid;
        gap: 12px;
    }
    .card {
        padding: 16px;
        transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
    }
    .card:hover {
        transform: translateY(-2px);
        border-color: rgba(142,197,255,.18);
        box-shadow: 0 16px 34px rgba(0,0,0,.24);
    }
    .meta {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 12px;
    }
    .pill {
        font-size: 12px;
        color: #d7e9ff;
        background: rgba(90,169,255,.10);
        border-color: rgba(90,169,255,.18);
    }
    .question {
        font-size: 22px;
        font-weight: 800;
        line-height: 1.65;
        margin-bottom: 12px;
        word-break: break-word;
    }
    .options {
        display: grid;
        gap: 8px;
        margin: 10px 0 12px;
    }
    .option {
        padding: 12px 13px;
        border-radius: 14px;
        background: rgba(255,255,255,.04);
        border: 1px solid var(--line);
        color: #dbe8ff;
        line-height: 1.78;
        word-break: break-word;
    }
    .answer {
        border-left: 4px solid var(--success);
        background: rgba(52,210,122,.08);
        padding: 14px 14px;
        border-radius: 14px;
        line-height: 1.85;
    }
    .answer .label {
        display: block;
        color: #8cf4b7;
        font-weight: 800;
        margin-bottom: 6px;
    }
    .pagination {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 10px;
        flex-wrap: wrap;
        margin-top: 22px;
    }
    .pagination a, .pagination span {
        color: var(--text);
        text-decoration: none;
        border: 1px solid var(--line);
        background: rgba(255,255,255,.04);
        padding: 10px 14px;
        border-radius: 12px;
        font-size: 14px;
    }
    .pagination a:hover {
        border-color: rgba(142,197,255,.22);
        background: rgba(255,255,255,.06);
    }
    .empty {
        text-align: center;
        color: var(--muted);
        padding: 36px 18px;
        border: 1px dashed var(--line);
        border-radius: 16px;
        background: rgba(255,255,255,.02);
        line-height: 1.9;
    }
    mark {
        background: var(--mark);
        color: #111;
        border-radius: 4px;
        padding: 0 3px;
    }
    .top-btn {
        position: fixed;
        right: 14px;
        bottom: calc(16px + var(--safe-bottom));
        width: 48px;
        height: 48px;
        border-radius: 999px;
        z-index: 998;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        opacity: 0;
        pointer-events: none;
        transform: translateY(10px);
        transition: opacity .2s ease, transform .2s ease, filter .15s ease;
    }
    .top-btn.is-visible {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }
    .reset-link {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        margin-left: auto;
        min-height: 34px;
        padding: 0 12px;
        border-radius: 999px;
        text-decoration: none;
        border: 1px solid var(--line);
        background: rgba(255,255,255,.04);
        color: var(--muted);
    }
    .reset-link:hover {
        color: var(--text);
        border-color: rgba(142,197,255,.18);
    }
    @media (max-width: 860px) {
        .wrap { padding: calc(10px + var(--safe-top)) 10px calc(28px + var(--safe-bottom)); }
        .hero, .card { border-radius: 16px; }
        .hero, .card { padding: 14px; }
        .hero { padding-top: 16px; }
        h1 { font-size: 24px; gap: 8px; }
        .title-mark { width: 7px; height: 24px; }
        .title-badge { height: 24px; font-size: 12px; padding: 0 10px; }
        .hero-stats { margin-top: 14px; gap: 6px; }
        .search-dock-anchor { margin-top: 0; }
        /* 手机：上排 输入+搜索，下排 分类全宽 */
        form.search-box {
            grid-template-columns: minmax(0, 1fr) 88px;
            gap: 8px;
        }
        .input-wrap { grid-column: 1; grid-row: 1; }
        button.search-btn { grid-column: 2; grid-row: 1; min-width: 0; width: 100%; }
        .select-wrap { grid-column: 1 / -1; grid-row: 2; }
        button.search-btn,
        .search-box input[type="text"],
        .search-box input[type="search"],
        .search-box select {
            height: 46px;
            font-size: 15px;
            border-radius: 13px;
            line-height: 46px;
        }
        .search-dock {
            top: calc(var(--safe-top) + 6px);
            padding: 8px;
            border-radius: 16px;
        }
        .search-dock.is-fixed {
            top: calc(var(--safe-top) + 6px);
            left: 10px;
            right: 10px;
        }
        .question { font-size: 18px; line-height: 1.75; }
        .toolbar { font-size: 12px; gap: 7px; }
        .tag, .pill { padding: 6px 9px; }
        .option, .answer { font-size: 14px; }
        .pagination {
            gap: 8px;
        }
        .pagination a, .pagination span {
            padding: 9px 12px;
            font-size: 13px;
        }
        .top-btn {
            right: 10px;
            bottom: calc(12px + var(--safe-bottom));
            width: 44px;
            height: 44px;
        }
    }
    @media (max-width: 520px) {
        .title-row {
            align-items: flex-start;
            gap: 8px;
        }
        h1 {
            font-size: 22px;
        }
        .title-badge {
            font-size: 11px;
        }
        form.search-box {
            grid-template-columns: minmax(0, 1fr) 80px;
        }
        .search-box input[type="text"],
        .search-box input[type="search"],
        .search-box select,
        button.search-btn {
            font-size: 14px;
        }
    }

    /* 华为 WATCH 5 等表盘：42/46mm 常见约 466×466 */
    @media (max-width: 540px) and (max-height: 540px) {
        .search-dock {
            padding: 8px;
            border-radius: 14px;
        }
        .search-dock.is-fixed {
            top: calc(var(--safe-top) + 4px) !important;
            left: 4px !important;
            right: 4px !important;
            padding: 6px 8px;
            border-radius: 12px;
            -webkit-backdrop-filter: none;
            backdrop-filter: none;
        }
        form.search-box {
            grid-template-columns: minmax(0,1fr) 56px !important;
            gap: 6px !important;
        }
        .input-wrap { grid-column: 1; grid-row: 1; }
        button.search-btn {
            grid-column: 2;
            grid-row: 1;
            font-size: 12px !important;
            min-width: 0;
            width: 100%;
        }
        .select-wrap { grid-column: 1 / -1; grid-row: 2; }
        .search-box input[type="text"],
        .search-box input[type="search"],
        .search-box select,
        button.search-btn {
            height: 38px;
            font-size: 13px;
            border-radius: 10px;
            line-height: 38px;
        }
        .question { font-size: 0.95rem; }
        .option, .answer { font-size: 0.88rem; }
    }

/* offline status */
.offline-badge{display:none;position:fixed;left:10px;bottom:calc(12px + env(safe-area-inset-bottom,0px));z-index:10060;padding:6px 10px;border-radius:999px;background:rgba(245,158,11,.18);border:1px solid rgba(245,158,11,.35);color:#fde68a;font-size:12px;}
.offline-badge.show{display:inline-flex;}
.loading-mask{position:fixed;inset:0;z-index:20000;background:rgba(7,17,31,.88);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:#dceaff;}
.loading-mask.hidden{display:none;}
.loading-mask .bar{width:min(240px,70vw);height:6px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;}
.loading-mask .bar>i{display:block;height:100%;width:20%;background:linear-gradient(90deg,#66b0ff,#8ec5ff);border-radius:99px;animation:loadslide 1.1s ease-in-out infinite;}
@keyframes loadslide{0%{transform:translateX(-100%)}100%{transform:translateX(400%)}}