/* ===== HUD ===== */
        #hud { position: absolute; inset: 0; pointer-events: none; z-index: 15; }
        #hud-top {
            position: absolute; top: 10px; left: 12px; right: 12px;
            display: flex; align-items: flex-start; justify-content: space-between;
        }
        .hud-left { display: flex; flex-direction: column; gap: 5px; }
        .hud-bar {
            position: relative; width: 190px; height: 20px;
            border-radius: 12px; overflow: hidden;
            background: #4a2c14;
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.35), 0 2px 0 rgba(255,255,255,0.12);
        }
        .hud-fill { position: absolute; top: 0; left: 0; bottom: 0; border-radius: 12px; width: 100%; transition: width 0.15s linear; }
        .hud-hp .hud-fill { background: linear-gradient(180deg, #ff9494, #ff5a5a); }
        .hud-xp { height: 14px; }
        .hud-xp .hud-fill { background: linear-gradient(180deg, #ffd96b, #ffb93c); }
        .hud-text {
            position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
            color: #fff; font-size: 11px; font-weight: bold;
            text-shadow: 0 1px 2px rgba(0,0,0,0.65); letter-spacing: 0.03em;
        }
        .hud-right { display: flex; flex-direction: column; align-items: flex-end; gap: 5px; }
        .hud-stat {
            background: rgba(91,52,22,0.65); border: 2px solid var(--line);
            border-radius: 14px; padding: 3px 12px;
            color: var(--cream); font-size: 13px; font-weight: bold;
            display: flex; align-items: center; gap: 6px;
            box-shadow: 0 3px 0 rgba(0,0,0,0.2);
        }
        #hud-boss {
            position: absolute; top: 0; left: 50%; transform: translateX(-50%);
            width: min(420px, 58vw); display: flex; flex-direction: column; align-items: center; gap: 3px;
        }
        .hud-boss-name { color: var(--cream); font-weight: bold; font-size: 13px; text-shadow: 0 2px 0 rgba(0,0,0,0.4); }
        .hud-boss-bar { width: 100%; height: 12px; }
        .hud-boss-bar .hud-fill { background: linear-gradient(180deg, #ff7d7d, #d63b3b); }
        #hud-shield {
            height: 6px; border-radius: 4px; display: none;
            background: linear-gradient(90deg, #c86bff, #ff7be0);
            box-shadow: 0 0 8px rgba(200,107,255,0.8);
        }
        #hud-weps {
            position: absolute; left: 12px; bottom: 10px;
            display: flex; align-items: center; gap: 5px; flex-wrap: wrap;
            font-size: 12px; color: var(--cream);
            text-shadow: 0 1px 2px rgba(0,0,0,0.6);
        }
        .chip {
            display: inline-block; background: rgba(255,227,194,0.92);
            color: var(--brown); border: 2px solid var(--line);
            border-radius: 12px; padding: 1px 8px; font-size: 11px; font-weight: bold;
            box-shadow: 0 2px 0 rgba(0,0,0,0.18);
        }
        #hud-warning {
            position: absolute; top: 30%; left: 50%; transform: translateX(-50%);
            font-size: 26px; font-weight: bold; color: var(--coral);
            text-shadow: 0 3px 0 rgba(0,0,0,0.35), 0 0 14px rgba(255,107,107,0.5);
            display: none; letter-spacing: 0.04em; white-space: nowrap;
        }
        #hud-hint {
            position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
            font-size: 12px; color: rgba(255,246,232,0.78); display: none;
            text-shadow: 0 1px 2px rgba(0,0,0,0.6); white-space: nowrap;
        }

        /* ===== 暂停遮罩 ===== */
        #pause-overlay {
            position: absolute; inset: 0; z-index: 25;
            display: none; align-items: center; justify-content: center;
            background: rgba(43,26,18,0.6);
        }
        .pause-box {
            background: var(--cream); border: 4px solid var(--orange-deep);
            border-radius: 20px; padding: 22px 40px; text-align: center;
            box-shadow: 0 8px 0 rgba(0,0,0,0.25), 0 0 40px rgba(255,140,60,0.35);
        }
        .pause-title { font-size: 26px; font-weight: bold; color: var(--brown); margin-bottom: 6px; }
        .pause-sub { font-size: 13px; color: var(--brown-soft); }

        /* ===== 顶部按钮 ===== */
        #ui-buttons {
            position: absolute; top: 74px; right: 10px; z-index: 30;
            display: flex; gap: 6px; pointer-events: all;
        }
        #ui-buttons button {
            width: 34px; height: 34px; border-radius: 50%;
            border: 2px solid var(--line); background: rgba(255,246,232,0.85);
            color: var(--brown); font-size: 16px; line-height: 1; cursor: pointer; padding: 0;
            box-shadow: 0 3px 0 rgba(0,0,0,0.2); transition: all 0.15s;
        }
        #ui-buttons button:hover { transform: translateY(-1px) scale(1.05); border-color: var(--orange); }
        #ui-buttons button:active { transform: translateY(2px); box-shadow: 0 1px 0 rgba(0,0,0,0.2); }
        #ui-btn-gap { width: 26px; }

        /* ===== 死神之指（隐藏功能） ===== */
        #btn-death-mark {
            position: relative; overflow: hidden;
            width: 38px; height: 38px; border-radius: 50%;
            border: 2px solid #7a0000; background: radial-gradient(circle at 30% 30%, #b30000, #5a0000);
            color: #ffd0d0; font-size: 18px; line-height: 1; cursor: pointer; padding: 0;
            box-shadow: 0 3px 0 rgba(0,0,0,0.5), 0 0 12px rgba(255,0,0,0.45);
            transition: all 0.15s;
        }
        #btn-death-mark:hover { transform: translateY(-1px) scale(1.08); border-color: #ff2222; box-shadow: 0 4px 0 rgba(0,0,0,0.5), 0 0 18px rgba(255,0,0,0.7); }
        #btn-death-mark:active { transform: translateY(2px); box-shadow: 0 1px 0 rgba(0,0,0,0.5); }
        #btn-death-mark.death-auto { box-shadow: 0 3px 0 rgba(0,0,0,0.5), 0 0 12px rgba(255,0,0,0.45), 0 0 0 3px rgba(255,60,60,0.55); }

        #death-panel {
            position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
            display: none; pointer-events: all; z-index: 25;
            flex-direction: column; align-items: center; gap: 12px;
            min-width: 340px; max-width: 92vw; padding: 22px 20px;
            background: radial-gradient(ellipse at 50% 0%, #3a0000, #140000 70%);
            border: 3px solid #8b0000; border-radius: 16px;
            box-shadow: 0 0 60px rgba(255,0,0,0.5), inset 0 0 40px rgba(120,0,0,0.4);
            color: #ffdada; text-align: center;
        }
        #death-panel h2 {
            margin: 0; font-size: 22px; color: #ff4444; letter-spacing: 0.12em;
            text-shadow: 0 0 14px rgba(255,0,0,0.8); display: flex; align-items: center; gap: 8px;
        }
        #death-panel .dp-desc { font-size: 13px; color: #ffb0b0; line-height: 1.6; }
        #death-panel .dp-desc b { color: #ff7777; }
        #death-panel .dp-cost { font-size: 14px; color: #ff5555; font-weight: bold; margin-top: 2px; }
        #death-panel .dp-btns { display: flex; gap: 12px; margin-top: 4px; }
        #death-panel .dp-btns button {
            padding: 8px 20px; border-radius: 8px; border: 2px solid #7a0000;
            background: #4a0000; color: #ffc0c0; font-size: 14px; cursor: pointer; transition: all 0.15s;
        }
        #death-panel .dp-btns button:hover { background: #6a0000; border-color: #ff2222; transform: scale(1.04); }
        #death-panel .dp-btns button.dp-confirm { background: linear-gradient(180deg, #8b0000, #4a0000); border-color: #ff3333; font-weight: bold; }
        #death-panel .dp-tip { font-size: 11px; color: #a06060; }