/* ============ 赛博幸存者 主样式（原单文件内全部 CSS 合并） ============ */
        /* ============================================================
           赛博朋克极简 UI · 设计系统
           参考《赛博朋克2077》《银翼杀手2049》
           克制色彩 / 几何切割 / 细线条 / 大量留白
           ============================================================ */

        /* === CSS 自定义属性（设计令牌） === */
        :root {
            --cyan:       #00e5ff;   /* 霓虹蓝 - 主色调 */
            --magenta:    #ff2d95;   /* 品红 - 强调色 */
            --green:      #00e676;   /* 绿色 - 经验/等级 */
            --red:        #ff3d4f;   /* 红色 - 危险/血量 */
            --gold:       #ffc400;   /* 金色 - 传说 */
            --blue:       #448aff;   /* 蓝色 - 稀有 */
            --white:      #e0e0e0;   /* 白色 - 普通 */
            --bg-deep:    #0a0a0f;   /* 最深背景 */
            --bg-panel:   rgba(10, 10, 20, 0.92);  /* 面板背景 */
            --bg-modal:   rgba(8, 8, 18, 0.97);    /* 模态框背景 */
            --text:       rgba(255, 255, 255, 0.85); /* 主文字 */
            --text-dim:   rgba(255, 255, 255, 0.50); /* 次要文字 */
            --text-muted: rgba(255, 255, 255, 0.30); /* 极淡文字 */
            --border-subtle: rgba(0, 229, 255, 0.12); /* 细微边框 */
            --border-cyan:   rgba(0, 229, 255, 0.35); /* 青色边框 */
            --border-magenta:rgba(255, 45, 149, 0.35);/* 品红边框 */
            --border-red:    rgba(255, 61, 79, 0.35); /* 红色边框 */
            --font-cn:    'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --font-mono:  'Courier New', 'SF Mono', 'Fira Code', monospace;
        }

        /* === 全局重置 === */
        *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

        body {
            background: var(--bg-deep);
            overflow: hidden;
            font-family: var(--font-cn);
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        #gameContainer { position: relative; width: 100vw; height: 100vh; overflow: hidden; }

        #gameCanvas {
            display: block;
            background: radial-gradient(ellipse at center, #0c1018 0%, #050508 100%);
            position: absolute; z-index: 1;
        }

        #ui { position: absolute; z-index: 10; pointer-events: none; }

        /* ============================================================
           通用面板 · 极简几何风格
           细边框 + 角落装饰线 + 半透明背景
           ============================================================ */
        .cyber-panel {
            background: var(--bg-panel);
            border: 0.5px solid var(--border-subtle);
            position: relative;
            overflow: hidden;
            /* 四个角落的小线段装饰 */
        }
        .cyber-panel::before {
            content: '';
            position: absolute; top: 0; left: 0;
            width: 0.6vw; height: 0.6vw;
            border-top: 1px solid var(--border-cyan);
            border-left: 1px solid var(--border-cyan);
            pointer-events: none; z-index: 2;
        }
        .cyber-panel::after {
            content: '';
            position: absolute; bottom: 0; right: 0;
            width: 0.6vw; height: 0.6vw;
            border-bottom: 1px solid var(--border-cyan);
            border-right: 1px solid var(--border-cyan);
            pointer-events: none; z-index: 2;
        }

        /* === FPS 显示 · 顶部居中 === */
        #fpsDisplay {
            position: absolute;
            top: 0.8vw; left: 50%; transform: translateX(-50%);
            padding: 0.4vw 0.6vw;
            background: rgba(0, 0, 0, 0.7);
            border: solid var(--border-subtle);
            border-width: 0.5px;
            color: var(--cyan);
            font-family: var(--font-mono);
            font-size: 0.65vw;
            font-weight: bold;
            pointer-events: none;
            z-index: 1000;
            letter-spacing: 0.05vw;
        }

        /* === 面板标题 === */
        .panel-title {
            color: var(--magenta); font-size: 0.5vw; letter-spacing: 0.15vw;
            text-transform: uppercase;
            margin-bottom: 0.4vw;
            display: flex; align-items: center; gap: 0.3vw;
            font-family: var(--font-cn);
            font-weight: 500;
        }
        .panel-title::before { content: '◆'; color: var(--cyan); font-size: 0.35vw; }

        /* ============================================================
           状态面板 · 左侧数据
           ============================================================ */
        #playerDataPanel { position: absolute; top: 1vw; left: 1vw; width: 8vw; padding: 0.6vw 0.7vw; }
        #playerDataPanel .data-item {
            display: flex; justify-content: space-between; align-items: center;
            margin-bottom: 0.2vw; padding: 0.2vw 0;
            border-bottom: 0.5px solid rgba(255,255,255,0.04);
        }
        #playerDataPanel .data-label {
            color: var(--magenta); font-size: 0.6vw; letter-spacing: 0.05vw;
            font-family: var(--font-cn); font-weight: 400;
        }
        #playerDataPanel .data-value {
            color: var(--cyan); font-size: 0.7vw; font-weight: bold;
            font-family: var(--font-mono); letter-spacing: 0.03vw;
        }

        /* === 生存面板 === */
        #playerShieldPanel { position: absolute; top: 1vw; left: 10vw; width: 8vw; padding: 0.6vw 0.7vw; }
        #playerShieldPanel .data-item {
            display: flex; justify-content: space-between; align-items: center;
            margin-bottom: 0.2vw; padding: 0.2vw 0;
            border-bottom: 0.5px solid rgba(255,255,255,0.04);
        }
        #playerShieldPanel .data-label {
            color: var(--magenta); font-size: 0.6vw; letter-spacing: 0.05vw;
            font-family: var(--font-cn); font-weight: 400;
        }
        #playerShieldPanel .data-value {
            color: var(--cyan); font-size: 0.7vw; font-weight: bold;
            font-family: var(--font-mono); letter-spacing: 0.03vw;
        }

        /* === 顶部状态栏（击杀/时间） === */
        #topBar {
            position: absolute; top: 1vw; left: 9vw; right: 10vw;
            display: flex; justify-content: flex-end; gap: 0.7vw; padding: 0.5vw 0.7vw;
        }
        #topBar .stat {
            display: flex; align-items: center; gap: 0.3vw;
            padding: 0.3vw 0.7vw;
            background: transparent;
            border-left: 2px solid var(--border-subtle);
        }
        #topBar .stat-icon { width: 1vw; height: 1vw; opacity: 0.6; filter: none; }
        #topBar .stat-value {
            color: var(--cyan); font-size: 0.8vw; font-weight: 600;
            font-family: var(--font-mono); letter-spacing: 0.03vw;
        }
        #topBar .stat-label {
            color: var(--text-dim); font-size: 0.5vw; letter-spacing: 0.05vw;
            font-family: var(--font-cn); font-weight: 400;
        }
        .stat-icon { width: 1vw; height: 1vw; opacity: 0.7; filter: none; }
        .stat-value {
            color: var(--cyan); font-size: 0.75vw; font-weight: bold;
            font-family: var(--font-mono); letter-spacing: 0.1vw;
        }
        .stat-label {
            color: var(--magenta); font-size: 0.5vw; letter-spacing: 0.05vw;
            font-family: var(--font-cn); font-weight: 400;
        }

        /* === 等级面板 · 右上 === */
        #levelPanel { position: absolute; top: 1vw; right: 1vw; width: 9vw; padding: 0.5vw 0.7vw; }
        #levelText {
            color: var(--green); font-size: 0.6vw; font-weight: 700;
            font-family: var(--font-mono); letter-spacing: 0.1vw;
            position: absolute; top: 0.5vw; right: 0.8vw;
        }
        #levelBar {
            width: 100%; height: 0.3vw;
            background: rgba(255,255,255,0.06);
            border: 0.5px solid rgba(0, 230, 118, 0.25);
            overflow: hidden; margin-top: 1.5vw;
        }
        #expFill {
            height: 100%;
            background: var(--green);
            width: 0%; transition: width 0.3s ease;
            opacity: 0.8;
        }

        /* === 波次面板 · 右中 === */
        #wavePanel { position: absolute; top: 5vw; right: 1vw; padding: 0.5vw 1vw; text-align: center; }
        #waveText {
            color: var(--text-dim); font-size: 0.6vw; letter-spacing: 0.2vw;
            text-transform: uppercase; font-family: var(--font-cn); font-weight: 400;
        }
        #waveNumber {
            color: var(--cyan); font-size: 1.4vw; font-weight: 700;
            font-family: var(--font-mono); letter-spacing: 0.05vw;
        }

        /* === 武器面板 · 左下 === */
        #weaponPanel { position: absolute; bottom: 1vw; left: 1vw; padding: 0.6vw 0.7vw; min-width: 8vw; }
        .weapon-item {
            background: transparent;
            padding: 0.5vw 0.7vw; margin: 0.2vw 0;
            border-left: 0.15vw solid var(--border-subtle);
            position: relative; overflow: hidden;
            transition: border-color 0.3s;
        }
        .weapon-item:hover { border-left-color: var(--border-cyan); }
        .weapon-item::before { content: none; }
        .weapon-item .weapon-name {
            color: var(--cyan); font-size: 0.7vw; font-weight: bold;
            font-family: var(--font-cn); letter-spacing: 0.05vw;
        }
        .weapon-item .weapon-level {
            color: var(--magenta); font-size: 0.6vw; float: right;
            font-family: var(--font-mono);
        }
        .weapon-item .weapon-icon { font-size: 0.8vw; margin-right: 0.3vw; }

        /* === 小地图 · 右下 === */
        #minimap {
            position: absolute; bottom: 2vw; right: 2vw;
            width: 8vw; height: 8vw;
            background: rgba(0,0,0,0.85);
            border: 0.5px solid var(--border-subtle);
        }
        #minimapCanvas { width: 100%; height: 100%; }

        /* ============================================================
           模态面板 · 升级菜单 / 百科 / 游戏结束
           ============================================================ */

        /* 升级菜单 */
        #upgradeMenu {
            position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
            display: none; flex-direction: column; gap: 0.5vw;
            background: var(--bg-modal); padding: 1.5vw 2vw;
            border: 0.5px solid var(--border-cyan);
            pointer-events: auto; min-width: 25vw; max-height: 80vh;
        }
        #upgradeMenu h2 {
            color: var(--text); text-align: center; margin-bottom: 1vw;
            font-size: 1.3vw; letter-spacing: 0.3vw; text-transform: uppercase;
            font-weight: 900; font-family: var(--font-cn);
        }
        .corner-decor { position: absolute; width: 1vw; height: 1vw; border: 1px solid var(--border-cyan); }
        .corner-decor.tl { top: -1px; left: -1px; border-right: none; border-bottom: none; }
        .corner-decor.tr { top: -1px; right: -1px; border-left: none; border-bottom: none; }
        .corner-decor.bl { bottom: -1px; left: -1px; border-right: none; border-top: none; }
        .corner-decor.br { bottom: -1px; right: -1px; border-left: none; border-top: none; }

        /* 升级选项卡片 */
        .upgrade-option {
            background: transparent;
            border: 0.5px solid var(--border-subtle);
            padding: 0.8vw 1.2vw; cursor: pointer;
            transition: border-color 0.25s, background 0.25s;
            position: relative; overflow: hidden;
        }
        .upgrade-option::before { content: none; }
        .upgrade-option:hover {
            background: rgba(0, 229, 255, 0.04);
            border-color: var(--border-cyan);
            transform: translateX(0.5vw);
        }
        .upgrade-option h3 {
            color: var(--cyan); font-size: 0.9vw; margin-bottom: 0.3vw;
            letter-spacing: 0.05vw; font-weight: 700; font-family: var(--font-cn);
        }
        .upgrade-option p {
            color: var(--text-dim); font-size: 0.7vw; letter-spacing: 0.03vw;
            font-weight: 400; margin: 0; font-family: var(--font-cn);
        }
        .upgrade-option .upgrade-type {
            position: absolute; right: 0.7vw; top: 50%; transform: translateY(-50%);
            color: var(--magenta); font-size: 0.6vw; letter-spacing: 0.05vw;
            font-weight: 500; font-family: var(--font-mono);
        }

        /* 升级品质色 */
        .upgrade-red {
            background: rgba(255, 61, 79, 0.04) !important;
            border: 0.5px solid rgba(255, 61, 79, 0.35) !important;
            box-shadow: none !important; animation: none !important;
        }
        .upgrade-red:hover { background: rgba(255, 61, 79, 0.08) !important; border-color: var(--red) !important; box-shadow: none !important; transform: translateX(0.5vw) !important; }
        .upgrade-red h3 { color: var(--red) !important; }
        .upgrade-red .upgrade-type { color: rgba(255, 61, 79, 0.6) !important; }

        .upgrade-gold {
            background: rgba(255, 196, 0, 0.04) !important;
            border: 0.5px solid rgba(255, 196, 0, 0.35) !important;
            box-shadow: none !important; animation: none !important;
        }
        .upgrade-gold:hover { background: rgba(255, 196, 0, 0.08) !important; border-color: var(--gold) !important; box-shadow: none !important; transform: translateX(0.5vw) !important; }
        .upgrade-gold h3 { color: var(--gold) !important; }
        .upgrade-gold .upgrade-type { color: rgba(255, 196, 0, 0.6) !important; }

        .upgrade-blue {
            background: rgba(68, 138, 255, 0.04) !important;
            border: 0.5px solid rgba(68, 138, 255, 0.3) !important;
            box-shadow: none !important;
        }
        .upgrade-blue:hover { background: rgba(68, 138, 255, 0.08) !important; border-color: var(--blue) !important; box-shadow: none !important; transform: translateX(0.5vw) !important; }
        .upgrade-blue h3 { color: var(--blue) !important; }
        .upgrade-blue .upgrade-type { color: rgba(68, 138, 255, 0.6) !important; }

        .upgrade-white {
            background: transparent !important;
            border: 0.5px solid rgba(255, 255, 255, 0.12) !important;
        }
        .upgrade-white:hover { background: rgba(255, 255, 255, 0.03) !important; border-color: rgba(255, 255, 255, 0.3) !important; box-shadow: none !important; transform: translateX(0.5vw) !important; }
        .upgrade-white h3 { color: var(--white) !important; }
        .upgrade-white .upgrade-type { color: var(--text-muted) !important; }

        .upgrade-prime {
            background: rgba(255, 45, 149, 0.04) !important;
            border: 0.5px solid rgba(255, 45, 149, 0.4) !important;
            box-shadow: none !important; animation: none !important;
        }
        .upgrade-prime:hover {
            background: rgba(255, 45, 149, 0.08) !important;
            border-color: var(--magenta) !important;
            box-shadow: none !important;
            transform: translateX(0.5vw) !important;
        }
        .upgrade-prime h3 { color: var(--magenta) !important; }
        .upgrade-prime .upgrade-type { color: var(--cyan) !important; }

        /* 百科面板 */
        #encyclopedia {
            position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
            display: none; flex-direction: column; gap: 0.6vw;
            background: var(--bg-modal); padding: 1.5vw 2vw;
            border: 0.5px solid var(--border-cyan);
            pointer-events: auto; min-width: 35vw; max-height: 80vh;
        }
        #encyclopedia h2 {
            color: var(--text); text-align: center; margin-bottom: 1vw;
            font-size: 1.3vw; letter-spacing: 0.3vw; text-transform: uppercase;
            font-weight: 900; font-family: var(--font-cn);
        }
        #encyclopediaTabs { display: flex; gap: 0.6vw; justify-content: center; margin-bottom: 1vw; }
        #encyclopediaTabs .encTab {
            background: transparent; border: 0.5px solid var(--border-subtle);
            color: var(--cyan); padding: 0.5vw 1.2vw; cursor: pointer;
            font-family: var(--font-cn); font-size: 0.7vw; letter-spacing: 0.1vw;
            transition: border-color 0.25s, color 0.25s, background 0.25s;
        }
        #encyclopediaTabs .encTab:hover { border-color: var(--border-cyan); background: transparent; }
        #encyclopediaTabs .encTab.active { background: rgba(255, 45, 149, 0.06); border-color: var(--border-magenta); color: var(--magenta); }
        #encyclopediaContent { display: flex; flex-direction: column; gap: 0.5vw; max-height: 25vw; overflow-y: auto; }
        .encItem {
            background: rgba(255, 255, 255, 0.03); border: 0.5px solid rgba(255, 255, 255, 0.12);
            padding: 0.7vw 1vw; display: flex; flex-direction: column; gap: 0.3vw;
        }
        .encItem-header { display: flex; justify-content: space-between; align-items: center; }
        .encItem-name { color: var(--cyan); font-size: 0.8vw; font-weight: bold; font-family: var(--font-cn); }
        .encItem-icon { font-size: 1.1vw; }
        .encItem-desc { color: var(--text-dim); font-size: 0.6vw; line-height: 1.4; font-family: var(--font-cn); }
        .encItem-stats { color: var(--text-muted); font-size: 0.5vw; margin-top: 0.3vw; font-family: var(--font-cn); }
        #closeEncyclopedia {
            margin-top: 0.6vw;
            background: transparent; border: 0.5px solid var(--border-cyan);
            color: var(--cyan); padding: 0.6vw 1.8vw; cursor: pointer;
            font-family: var(--font-cn); font-size: 0.7vw; letter-spacing: 0.2vw;
            transition: background 0.25s; align-self: center;
        }
        #closeEncyclopedia:hover { background: rgba(0, 229, 255, 0.06); }

        /* === 升级提示浮层 === */
        .upgrade-tooltip {
            position: absolute; bottom: 100%; left: 0;
            margin-bottom: 0.5vw;
            background: rgba(8, 8, 18, 0.97);
            border: 0.5px solid var(--border-cyan);
            padding: 0.5vw 0.7vw;
            min-width: 10vw; max-width: 16vw;
            z-index: 1000;
            display: none; pointer-events: none;
        }
        .upgrade-tooltip::after {
            content: ''; position: absolute; bottom: -0.5vw; left: 1vw;
            border-left: 0.4vw solid transparent; border-right: 0.4vw solid transparent;
            border-top: 0.5vw solid var(--border-cyan);
        }
        .upgrade-tooltip p {
            color: var(--text-dim); font-size: 0.5vw; line-height: 1.4;
            letter-spacing: 0.03vw; font-weight: 400; margin: 0;
        }
        .upgrade-option:hover .upgrade-tooltip { display: block; }

        /* ============================================================
           游戏结束界面
           ============================================================ */
        #gameOver {
            position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
            display: none; flex-direction: column; align-items: center; gap: 1.2vw;
            background: var(--bg-modal); padding: 2.7vw 4.2vw;
            border: 0.5px solid var(--border-red);
            pointer-events: auto;
        }
        #gameOver h1 {
            color: var(--red); font-size: 3vw; letter-spacing: 0.7vw;
            text-transform: uppercase; font-weight: 700; font-family: var(--font-cn);
        }
        #gameOver .stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5vw; margin: 1vw 0; }
        #gameOver .end-stat {
            text-align: center; padding: 0.7vw;
            border: 0.5px solid var(--border-subtle);
            background: transparent;
        }
        #gameOver .end-stat-label {
            color: var(--magenta); font-size: 0.5vw; letter-spacing: 0.2vw;
            text-transform: uppercase; margin-bottom: 0.4vw; font-family: var(--font-cn);
        }
        #gameOver .end-stat-value {
            color: var(--cyan); font-size: 1.6vw; font-weight: 600;
            font-family: var(--font-mono);
        }
        #restartBtn {
            background: transparent; border: 0.5px solid var(--border-red);
            padding: 0.9vw 2.7vw; color: var(--red);
            font-size: 1vw; cursor: pointer; letter-spacing: 0.25vw;
            text-transform: uppercase; transition: background 0.25s, border-color 0.25s;
            position: relative; overflow: hidden; margin-top: 1vw;
            font-family: var(--font-cn);
        }
        #restartBtn::before { content: none; }
        #restartBtn:hover { background: rgba(255, 61, 79, 0.06); border-color: var(--red); transform: none; box-shadow: none; }

        /* ============================================================
           开始界面
           ============================================================ */
        #startScreen {
            position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
            display: flex; flex-direction: column; align-items: center; gap: 1.8vw;
            pointer-events: auto; padding: 3.3vw 5.4vw;
            background: var(--bg-modal); border: 0.5px solid var(--border-cyan);
        }
        #startScreen h1 {
            color: var(--cyan); font-size: 3vw; letter-spacing: 0.6vw;
            font-weight: 700; font-family: var(--font-cn);
        }
        #startScreen .subtitle {
            color: var(--magenta); font-size: 0.7vw; letter-spacing: 0.8vw;
            text-transform: uppercase; margin-top: -1.3vw; font-family: var(--font-mono);
        }
        #startBtn {
            background: transparent; border: 0.5px solid var(--border-cyan);
            padding: 1.1vw 3.9vw; color: var(--cyan);
            font-size: 1.2vw; cursor: pointer; letter-spacing: 0.35vw;
            text-transform: uppercase; transition: background 0.3s, border-color 0.3s;
            position: relative; overflow: hidden; font-family: var(--font-cn);
        }
        #startBtn::before { content: none; }
        #startBtn:hover { background: rgba(0, 229, 255, 0.06); border-color: var(--cyan); transform: none; box-shadow: none; }
        #controls { color: var(--text-muted); font-size: 0.6vw; text-align: center; line-height: 2; letter-spacing: 0.1vw; font-family: var(--font-cn); }
        #controls span {
            color: var(--cyan); border: 0.5px solid var(--border-subtle);
            padding: 0.1vw 0.5vw; margin: 0 0.2vw; background: transparent;
            font-family: var(--font-mono); font-size: 0.6vw;
        }

        /* ============================================================
           扫描线 + 网格叠加层
           ============================================================ */
        .scanline {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background: repeating-linear-gradient(
                0deg, transparent, transparent 2px,
                rgba(0, 0, 0, 0.03) 2px, rgba(0, 0, 0, 0.03) 4px
            );
            pointer-events: none; z-index: 1000; opacity: 0.08;
        }
        .grid-overlay {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background-image:
                linear-gradient(rgba(0, 229, 255, 0.012) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 229, 255, 0.012) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none; z-index: -1;
        }

        /* ============================================================
           按钮系统（设置/属性/百科/DEBUG）
           ============================================================ */
        .control-btn {
            position: absolute; right: 11vw;
            padding: 0.4vw 0.6vw; cursor: pointer; pointer-events: auto;
            font-size: 0.6vw; letter-spacing: 0.1vw;
            color: var(--cyan);
            background: rgba(0, 229, 255, 0.05);
            border: solid var(--border-subtle);
            border-width: 0.5px;
            transition: color 0.25s, border-color 0.25s, background 0.25s;
            z-index: 100; width: 5vw; text-align: center;
            display: flex; align-items: center; justify-content: center;
            font-family: var(--font-cn);
        }
        .control-btn:hover { background: rgba(0, 229, 255, 0.08); border-color: var(--border-cyan); }
        .control-btn.disabled, .control-btn.muted { color: var(--text-muted); border-color: rgba(255,255,255,0.06); }

        #settingsBtn { bottom: 2vw; }
        #upgradeStatsBtn { bottom: 4vw; }
        #encyclopediaBtn { bottom: 6vw; }

        #debugBtn {
            position: absolute; right: 11vw; bottom: 8vw;
            padding: 0.4vw 0.6vw; cursor: pointer; pointer-events: auto;
            font-size: 0.6vw; letter-spacing: 0.1vw;
            color: var(--magenta);
            background: rgba(255, 45, 149, 0.05);
            border: 0.5px solid rgba(255, 45, 149, 0.2);
            transition: color 0.25s, border-color 0.25s, background 0.25s;
            z-index: 998; width: 5vw; text-align: center;
            display: flex; align-items: center; justify-content: center;
            font-family: var(--font-mono);
        }
        #debugBtn:hover { color: var(--magenta); border-color: var(--border-magenta); background: rgba(255, 45, 149, 0.08); }

        /* ============================================================
           通用模态框样式（设置/调试/属性调整等面板）
           用于替换内联 style 中的视觉属性
           ============================================================ */
        .game-modal {
            position: absolute;
            background: var(--bg-modal);
            border: 0.5px solid var(--border-cyan);
            display: none; flex-direction: column;
            z-index: 9997; pointer-events: auto;
        }
        .game-modal .modal-header {
            padding: 0.7vw 1vw;
            background: rgba(0, 229, 255, 0.03);
            border-bottom: 0.5px solid var(--border-subtle);
            cursor: move;
            display: flex; justify-content: space-between; align-items: center;
        }
        .game-modal .modal-header h3 {
            color: var(--cyan); margin: 0;
            font-size: 0.7vw; font-weight: 500; font-family: var(--font-cn);
            letter-spacing: 0.05vw;
        }
        .game-modal .modal-header button {
            background: none; border: none;
            color: var(--text-dim); cursor: pointer;
            font-size: 1vw; width: 1.6vw; height: 1.6vw;
            display: flex; align-items: center; justify-content: center;
            transition: color 0.2s;
        }
        .game-modal .modal-header button:hover { color: var(--cyan); }
        .game-modal .modal-body {
            padding: 0.8vw 1vw; display: flex; flex-direction: column;
            gap: 0.6vw; overflow-y: auto;
        }

        /* DEBUG 模态框（品红色边框） */
        .game-modal.debug {
            border-color: var(--border-magenta);
        }
        .game-modal.debug .modal-header {
            background: rgba(255, 45, 149, 0.03);
            border-bottom-color: rgba(255, 45, 149, 0.15);
        }
        .game-modal.debug .modal-header h3 { color: var(--magenta); }
        .game-modal.debug .modal-header button:hover { color: var(--magenta); }

        /* 红色模态框（删除武器等） */
        .game-modal.danger {
            border-color: var(--border-red);
        }
        .game-modal.danger .modal-header {
            background: rgba(255, 61, 79, 0.03);
            border-bottom-color: rgba(255, 61, 79, 0.15);
        }
        .game-modal.danger .modal-header h3 { color: var(--red); }
        .game-modal.danger .modal-header button:hover { color: var(--red); }

        /* 模态框内按钮 */
        .game-modal .modal-btn {
            padding: 0.4vw 0.8vw;
            background: transparent;
            border: 0.5px solid var(--border-subtle);
            color: var(--text);
            cursor: pointer;
            font-family: var(--font-cn);
            font-size: 0.55vw;
            letter-spacing: 0.03vw;
            transition: border-color 0.25s, background 0.25s, color 0.25s;
            text-align: left;
        }
        .game-modal .modal-btn:hover {
            border-color: var(--border-cyan);
            background: rgba(0, 229, 255, 0.04);
            color: var(--cyan);
        }
        .game-modal .modal-btn.danger-btn {
            border-color: rgba(255, 61, 79, 0.2);
            color: var(--red);
        }
        .game-modal .modal-btn.danger-btn:hover {
            border-color: var(--border-red);
            background: rgba(255, 61, 79, 0.04);
        }
        .game-modal .modal-input {
            padding: 0.35vw 0.5vw;
            background: rgba(0,0,0,0.4);
            border: 0.5px solid var(--border-subtle);
            color: var(--text);
            font-family: var(--font-mono);
            font-size: 0.6vw;
            transition: border-color 0.25s;
        }
        .game-modal .modal-input:focus {
            outline: none;
            border-color: var(--border-cyan);
        }
        .game-modal .modal-label {
            color: var(--text-dim);
            font-family: var(--font-cn);
            font-size: 0.55vw;
            letter-spacing: 0.03vw;
        }

        /* === 时间流速滑块 === */
        #timeSpeedSlider {
            width: 100%; height: 0.3vw;
            background: rgba(255,255,255,0.08);
            border-radius: 0.15vw; outline: none;
            -webkit-appearance: none; appearance: none;
        }
        #timeSpeedSlider::-webkit-slider-thumb {
            -webkit-appearance: none; appearance: none;
            width: 1vw; height: 1vw;
            background: var(--cyan);
            border-radius: 50%; cursor: pointer;
            border: 1px solid rgba(255,255,255,0.2);
        }
        #timeSpeedSlider::-moz-range-thumb {
            width: 1vw; height: 1vw;
            background: var(--cyan);
            border-radius: 50%; cursor: pointer;
            border: 1px solid rgba(255,255,255,0.2);
        }

        /* === 密码输入框 === */
        #debugPasswordInput {
            padding: 0.5vw;
            background: rgba(0,0,0,0.4);
            border: 0.5px solid var(--border-subtle);
            color: var(--text);
            font-family: var(--font-mono);
            font-size: 0.7vw; text-align: center;
            transition: border-color 0.25s;
        }
        #debugPasswordInput:focus {
            outline: none;
            border-color: var(--border-cyan);
        }

        /* ============================================================
           摇杆样式
           ============================================================ */
        #joystick {
            position: absolute; bottom: 2vw; left: 2vw;
            width: 9vw; height: 9vw;
            display: none; z-index: 99;
        }
        #joystick-base {
            width: 100%; height: 100%;
            background: rgba(0, 229, 255, 0.04);
            border: 0.5px solid var(--border-subtle);
            border-radius: 50%; position: relative;
        }
        #joystick-knob {
            width: 40%; height: 40%;
            background: rgba(0, 229, 255, 0.12);
            border: 0.5px solid var(--border-cyan);
            border-radius: 50%;
            position: absolute; top: 30%; left: 30%;
            touch-action: none;
        }

        /* ============================================================
           Scrollbar · 极简滚动条
           ============================================================ */
        ::-webkit-scrollbar { width: 0.4vw; height: 0.4vw; }
        ::-webkit-scrollbar-track { background: transparent; }
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 229, 255, 0.15);
            border-radius: 0.2vw;
        }
        ::-webkit-scrollbar-thumb:hover { background: rgba(0, 229, 255, 0.3); }

        /* ============================================================
           动画 · 仅保留必要的过渡效果
           ============================================================ */

        /* 标题微呼吸 */
        @keyframes breathe {
            0%, 100% { opacity: 0.9; }
            50% { opacity: 1; }
        }
        #startScreen h1 { animation: breathe 4s ease-in-out infinite; }

        /* 所有过渡统一用 transition */
        .cyber-panel, .upgrade-option, .game-modal, .encItem,
        .control-btn, #debugBtn, #startBtn, #restartBtn,
        #closeEncyclopedia, .weapon-item, .encTab {
            transition: border-color 0.25s ease, background 0.25s ease, color 0.25s ease, transform 0.2s ease;
        }

        /* ============================================================
           响应式适配
           ============================================================ */

        /* 小屏幕（手机横屏） */
        @media (max-aspect-ratio: 16/10) {
            #playerDataPanel, #playerShieldPanel { width: 12vw; padding: 0.6vw; }
            #playerShieldPanel { left: 14vw; }
            #topBar { left: 26vw; }
            #playerDataPanel .data-label,
            #playerShieldPanel .data-label { font-size: 0.7vw; }
            #playerDataPanel .data-value,
            #playerShieldPanel .data-value { font-size: 0.8vw; }
            #weaponPanel { min-width: 14vw; padding: 0.7vw 0.8vw; }
            .weapon-item .weapon-name { font-size: 0.9vw; }
            .weapon-item .weapon-level { font-size: 0.8vw; }
            .control-btn { width: 6vw; font-size: 0.7vw; }
            #debugBtn { width: 6vw; font-size: 0.7vw; }
        }

        /* 超宽屏 */
        @media (min-aspect-ratio: 21/9) {
            #upgradeMenu { min-width: 20vw; }
            #encyclopedia { min-width: 28vw; }
        }
/* ---- 内嵌于 <body> 的补充样式 ---- */
                            #timeSpeedSlider::-webkit-slider-thumb {
                                -webkit-appearance: none; appearance: none;
                                width: 1vw; height: 1vw;
                                background: var(--cyan);
                                border-radius: 50%; cursor: pointer;
                                border: 1px solid rgba(255,255,255,0.2);
                            }
                            #timeSpeedSlider::-moz-range-thumb {
                                width: 1vw; height: 1vw;
                                background: var(--cyan);
                                border-radius: 50%; cursor: pointer;
                                border: 1px solid rgba(255,255,255,0.2);
                            }


/* ═══════════════════════════════════════════════════════
   交互锁定 · 禁止选择 / 拖拽 / 高亮（配合 js/guard.js）
   ═══════════════════════════════════════════════════════ */
html, body, canvas, button, div {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}
img, canvas {
    -webkit-user-drag: none;
    user-drag: none;
}

/* ═══════════════════════════════════════════════════════
   移动端横屏引导层（js/mobile.js）
   ═══════════════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════════════
   移动端强制横屏（js/mobile.js 挂 .portrait-game）
   竖屏手机：游戏容器整体旋转 90°，横屏视觉铺满
   ═══════════════════════════════════════════════════════ */
html.portrait-game body {
    overflow: hidden;
}
html.portrait-game #gameContainer {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 100vh;
    height: 100vw;
    margin: -50vw 0 0 -50vh;   /* 上移自身高/2，左移自身宽/2 → 中心对齐 */
    transform: rotate(90deg);
    transform-origin: 50% 50%;
}