/* ============================================================
   城市公交模拟器 3D - 主样式表
   风格：深色主题 + 玻璃态效果 + 响应式布局
   ============================================================ */

/* ==================== CSS变量 ==================== */
:root {
    --primary-color: #1a8cff;
    --primary-dark: #0066cc;
    --primary-light: #4da6ff;
    --accent-green: #00e676;
    --accent-yellow: #ffd600;
    --accent-red: #ff1744;

    --bg-dark: #0a0e17;
    --bg-medium: #131a2b;
    --bg-light: #1c2640;
    --bg-card: rgba(20, 30, 50, 0.85);

    --text-primary: #e8edf5;
    --text-secondary: #8899b0;
    --text-muted: #556680;
    --text-bright: #ffffff;

    --glass-bg: rgba(15, 22, 40, 0.75);
    --glass-border: rgba(100, 140, 200, 0.15);
    --glass-blur: blur(20px);

    --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-digital: 'Orbitron', 'Courier New', monospace;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.35s ease;
}

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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-cn);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

/* ==================== 屏幕与面板基础 ==================== */
.screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    z-index: 10;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.screen.active {
    display: flex;
    opacity: 1;
}

.panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    z-index: 50;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.panel.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.panel-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

/* ==================== 加载界面 ==================== */
#loading-screen {
    background: linear-gradient(135deg, #0a0e17 0%, #131a2b 50%, #0a0e17 100%);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.loading-bus-animation {
    position: relative;
    width: 200px;
    height: 80px;
    margin-bottom: 10px;
}

.loading-bus {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    animation: busBounce 2s ease-in-out infinite;
}

.bus-body {
    width: 100px;
    height: 40px;
    background: linear-gradient(180deg, var(--primary-color), var(--primary-dark));
    border-radius: 8px 8px 4px 4px;
    display: flex;
    align-items: center;
    padding: 6px;
    gap: 4px;
    box-shadow: 0 4px 15px rgba(26, 140, 255, 0.3);
}

.bus-window {
    width: 14px;
    height: 18px;
    background: rgba(150, 200, 255, 0.6);
    border-radius: 3px;
    border: 1px solid rgba(100, 160, 220, 0.4);
}

.bus-door {
    width: 10px;
    height: 18px;
    background: rgba(150, 200, 255, 0.3);
    border-radius: 3px;
    border: 1px solid rgba(100, 160, 220, 0.3);
    border-left: 2px solid rgba(255, 255, 255, 0.5);
}

.bus-wheel {
    position: absolute;
    bottom: -6px;
    width: 14px;
    height: 14px;
    background: #333;
    border-radius: 50%;
    border: 2px solid #555;
    animation: wheelSpin 0.5s linear infinite;
}

.bus-wheel-front { left: 15px; }
.bus-wheel-rear { right: 15px; }

.road-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: repeating-linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.4) 0px,
        rgba(255, 255, 255, 0.4) 20px,
        transparent 20px,
        transparent 40px
    );
    animation: roadMove 1s linear infinite;
}

@keyframes busBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes wheelSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes roadMove {
    from { background-position: 0 0; }
    to { background-position: 40px 0; }
}

.loading-title {
    font-size: 2.2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-light), var(--text-bright));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 4px;
}

.loading-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    letter-spacing: 2px;
}

.loading-bar-container {
    width: 300px;
    height: 6px;
    background: var(--bg-light);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 10px;
}

.loading-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 3px;
    transition: width 0.3s ease;
    box-shadow: 0 0 15px rgba(26, 140, 255, 0.5);
}

.loading-percent {
    font-family: var(--font-digital);
    font-size: 1.1rem;
    color: var(--primary-light);
    margin-top: 5px;
}

.loading-tip {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 15px;
    padding: 8px 16px;
    background: rgba(26, 140, 255, 0.08);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(26, 140, 255, 0.1);
}

/* ==================== 主菜单 ==================== */
#main-menu {
    background: linear-gradient(135deg, #0a0e17 0%, #0f1825 30%, #162035 60%, #0a0e17 100%);
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.menu-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(26, 140, 255, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.menu-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    padding: 40px;
    animation: fadeInUp 0.8s ease;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.menu-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.game-title {
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, #ffffff 0%, #c0d8f0 40%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 8px;
    filter: drop-shadow(0 2px 10px rgba(26, 140, 255, 0.3));
}

.game-subtitle {
    font-family: var(--font-digital);
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 6px;
}

.title-decoration {
    width: 120px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    margin: 4px 0;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 280px;
}

.menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 24px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-cn);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    position: relative;
    overflow: hidden;
}

.menu-btn:hover {
    background: rgba(30, 45, 70, 0.85);
    border-color: rgba(100, 140, 200, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.menu-btn:active {
    transform: translateY(0);
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-color: rgba(77, 166, 255, 0.3);
    font-weight: 700;
    font-size: 1.1rem;
    padding: 16px 24px;
    box-shadow: 0 4px 20px rgba(26, 140, 255, 0.25);
}

.primary-btn:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    box-shadow: 0 8px 30px rgba(26, 140, 255, 0.35);
}

.danger-btn:hover {
    border-color: rgba(255, 23, 68, 0.4);
    background: rgba(255, 23, 68, 0.15);
    color: var(--accent-red);
}

.btn-icon {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
    font-family: var(--font-digital);
}

.btn-text {
    letter-spacing: 2px;
}

.menu-footer {
    margin-top: 20px;
}

.version-info {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

/* ==================== 路线选择面板 ==================== */
.route-panel {
    width: 90%;
    max-width: 700px;
    max-height: 85vh;
    background: var(--bg-medium);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--glass-border);
}

.panel-title {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.panel-close {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.panel-close:hover {
    background: rgba(255, 23, 68, 0.15);
    border-color: rgba(255, 23, 68, 0.3);
    color: var(--accent-red);
}

.route-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.route-list::-webkit-scrollbar { width: 6px; }
.route-list::-webkit-scrollbar-track { background: transparent; }
.route-list::-webkit-scrollbar-thumb { background: var(--bg-light); border-radius: 3px; }

.route-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.route-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.route-card:hover {
    border-color: rgba(26, 140, 255, 0.3);
    background: rgba(25, 38, 65, 0.9);
    transform: translateX(4px);
}

.route-card:hover::before { opacity: 1; }
.route-card.selected {
    border-color: var(--primary-color);
    background: rgba(26, 140, 255, 0.1);
}
.route-card.selected::before { opacity: 1; }

.route-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.route-number {
    font-family: var(--font-digital);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-light);
}

.route-tag {
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 1px;
}

.route-tag.easy { background: rgba(0, 230, 118, 0.15); color: var(--accent-green); border: 1px solid rgba(0, 230, 118, 0.3); }
.route-tag.medium { background: rgba(255, 214, 0, 0.15); color: var(--accent-yellow); border: 1px solid rgba(255, 214, 0, 0.3); }
.route-tag.hard { background: rgba(255, 23, 68, 0.15); color: var(--accent-red); border: 1px solid rgba(255, 23, 68, 0.3); }
.route-tag.night { background: rgba(156, 39, 176, 0.15); color: #ce93d8; border: 1px solid rgba(156, 39, 176, 0.3); }

.route-info h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.route-details {
    display: flex;
    gap: 16px;
}

.route-details span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.panel-actions {
    display: flex;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--glass-border);
}

.panel-actions .menu-btn { flex: 1; }

/* ==================== 设置面板 ==================== */
.settings-panel {
    width: 90%;
    max-width: 550px;
    max-height: 85vh;
    background: var(--bg-medium);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.settings-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px 24px;
}

.settings-list::-webkit-scrollbar { width: 6px; }
.settings-list::-webkit-scrollbar-track { background: transparent; }
.settings-list::-webkit-scrollbar-thumb { background: var(--bg-light); border-radius: 3px; }

.setting-group { margin-bottom: 24px; }

.setting-group-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-light);
    letter-spacing: 2px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--glass-border);
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
}

.setting-label {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.setting-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 140px;
    height: 6px;
    background: var(--bg-light);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(26, 140, 255, 0.4);
    transition: all var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 15px rgba(26, 140, 255, 0.6);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.slider-value {
    font-family: var(--font-digital);
    font-size: 0.8rem;
    color: var(--primary-light);
    min-width: 36px;
    text-align: right;
}

.select-input {
    padding: 8px 32px 8px 12px;
    background: var(--bg-light);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-cn);
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238899b0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}

.select-input:hover, .select-input:focus {
    border-color: var(--primary-color);
}

.select-input option {
    background: var(--bg-medium);
    color: var(--text-primary);
}

/* ==================== 暂停菜单 ==================== */
#pause-menu {
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.pause-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.pause-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    animation: fadeInUp 0.3s ease;
}

.pause-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 6px;
    color: var(--text-bright);
}

.pause-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 240px;
}

/* ==================== 游戏容器 ==================== */
#game-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* ==================== 游戏HUD ==================== */
#game-hud {
    pointer-events: none;
    z-index: 20;
    flex-direction: column;
}

#game-hud > * {
    pointer-events: auto;
}

/* 左上角仪表盘 */
.hud-top-left {
    position: absolute;
    top: 16px;
    left: 16px;
    display: flex;
    gap: 16px;
}

/* 仪表盘通用样式 */
.gauge {
    position: relative;
    width: 120px;
    height: 120px;
}

.gauge-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: conic-gradient(
        from 210deg,
        var(--accent-green) 0deg 60deg,
        var(--accent-yellow) 60deg 100deg,
        var(--accent-red) 100deg 120deg,
        transparent 120deg 240deg
    );
    opacity: 0.3;
    mask: radial-gradient(transparent 55%, black 56%);
    -webkit-mask: radial-gradient(transparent 55%, black 56%);
}

.gauge-ticks {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid rgba(100, 140, 200, 0.2);
}

.gauge-ticks::before {
    content: '';
    position: absolute;
    top: 10%;
    left: 10%;
    width: 80%;
    height: 80%;
    border-radius: 50%;
    border: 1px dashed rgba(100, 140, 200, 0.15);
}

.gauge-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 2;
}

.gauge-value {
    font-family: var(--font-digital);
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--text-bright);
    line-height: 1;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.gauge-unit {
    font-size: 0.6rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    margin-top: 2px;
}

.gauge-needle {
    position: absolute;
    bottom: 50%;
    left: 50%;
    width: 3px;
    height: 45px;
    background: linear-gradient(to top, var(--accent-red), #ff6b6b);
    transform-origin: bottom center;
    transform: translateX(-50%) rotate(-120deg);
    transition: transform 0.15s ease-out;
    z-index: 3;
    border-radius: 2px;
    box-shadow: 0 0 8px rgba(255, 23, 68, 0.5);
}

.gauge-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    background: var(--accent-red);
    border-radius: 50%;
    z-index: 4;
    box-shadow: 0 0 10px rgba(255, 23, 68, 0.6);
}

/* 右上角信息 */
.hud-top-right {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
}

.hud-info-box {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 12px 18px;
    text-align: right;
    min-width: 160px;
}

.hud-route {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 6px;
}

.hud-passengers {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.hud-passengers span {
    font-family: var(--font-digital);
    color: var(--accent-green);
    font-weight: 700;
}

.hud-time {
    font-family: var(--font-digital);
    font-size: 1.1rem;
    color: var(--primary-light);
    letter-spacing: 2px;
}

.hud-gear-box {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 8px 16px;
    text-align: center;
    min-width: 60px;
}

.gear-label {
    font-size: 0.6rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.gear-value {
    font-family: var(--font-digital);
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--accent-green);
}

/* 分数与金币 */
.hud-score-row {
    display: flex;
    gap: 12px;
    margin-top: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.hud-score-row span {
    font-family: var(--font-digital);
    color: var(--accent-yellow);
    font-weight: 700;
}

/* 燃油条 */
.hud-fuel-bar {
    margin-top: 4px;
    height: 4px;
    background: rgba(100, 160, 200, 0.15);
    border-radius: 2px;
    overflow: hidden;
    min-width: 60px;
}

.hud-fuel-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-red), var(--accent-yellow), var(--accent-green));
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* 路线进度条 */
.hud-progress-bar {
    margin-top: 6px;
    height: 4px;
    background: rgba(100, 160, 200, 0.15);
    border-radius: 2px;
    overflow: hidden;
    min-width: 120px;
}

.hud-progress-fill {
    height: 100%;
    background: var(--primary-color);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* 下一站信息 */
.hud-next-stop {
    font-size: 0.75rem;
    color: var(--primary-light);
    margin-top: 4px;
}

/* 到站距离 */
.hud-stop-distance {
    font-size: 0.7rem;
    color: var(--accent);
    margin-top: 2px;
}

/* 方向箭头 */
.hud-direction {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--accent);
    transition: transform 0.3s ease;
}

/* 到站提示 */
.hud-stop-arrival {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 2px solid var(--accent-green);
    border-radius: var(--radius-lg);
    padding: 16px 32px;
    text-align: center;
    animation: popIn 0.4s ease;
}

.hud-stop-arrival h3 {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--accent-green);
}

.hud-stop-arrival p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

@keyframes popIn {
    0% { transform: translate(-50%, -50%) scale(0.5); opacity: 0; }
    70% { transform: translate(-50%, -50%) scale(1.05); }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

/* 底部控制提示 */
.hud-bottom-hints {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.hint-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
}

kbd {
    display: inline-block;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    font-family: var(--font-digital);
    font-size: 0.7rem;
    color: var(--text-bright);
    min-width: 20px;
    text-align: center;
}

/* 暂停按钮 */
.hud-pause-btn {
    position: absolute;
    top: 16px;
    right: 50%;
    transform: translateX(50%);
    width: 40px;
    height: 40px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    pointer-events: auto;
    font-family: var(--font-digital);
}

.hud-pause-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-bright);
}

/* 通知提示 */
.hud-notification {
    position: absolute;
    top: 70px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 10px 24px;
    font-size: 0.9rem;
    color: var(--text-primary);
    opacity: 0;
    transition: all var(--transition-normal);
    pointer-events: none;
    white-space: nowrap;
}

.hud-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ==================== 游戏结束面板 ==================== */
.gameover-panel {
    width: 90%;
    max-width: 450px;
    background: var(--bg-medium);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.gameover-header {
    text-align: center;
    padding: 30px 24px 20px;
    border-bottom: 1px solid var(--glass-border);
}

.gameover-title {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--accent-yellow);
    letter-spacing: 4px;
    margin-bottom: 12px;
}

.gameover-stars {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.star {
    font-size: 2rem;
    color: var(--bg-light);
    transition: all 0.3s ease;
}

.star.filled {
    color: var(--accent-yellow);
    text-shadow: 0 0 15px rgba(255, 214, 0, 0.5);
    animation: starPop 0.4s ease;
}

@keyframes starPop {
    0% { transform: scale(0); }
    60% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

.gameover-stats {
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.stat-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid rgba(100, 140, 200, 0.08);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.stat-value {
    font-family: var(--font-digital);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-bright);
}

/* ==================== 触屏控制 ==================== */
.touch-controls {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    display: none;
    z-index: 30;
    pointer-events: none;
}

.touch-controls.active {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding: 0 16px 16px;
}

.touch-left, .touch-right {
    pointer-events: auto;
}

/* 方向盘 */
.steering-wheel-container {
    width: 140px;
    height: 140px;
    position: relative;
}

.steering-wheel {
    width: 100%;
    height: 100%;
    position: relative;
}

.wheel-outer-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 8px solid #444;
    box-shadow: inset 0 0 0 3px #333, 0 0 15px rgba(0, 0, 0, 0.5);
}

.wheel-inner-ring {
    position: absolute;
    top: 15%;
    left: 15%;
    width: 70%;
    height: 70%;
    border-radius: 50%;
    border: 3px solid #3a3a3a;
}

.wheel-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 36px;
    height: 36px;
    background: radial-gradient(circle, #555, #333);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-digital);
    font-size: 0.7rem;
    color: #888;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.wheel-spoke {
    position: absolute;
    background: #3a3a3a;
    border-radius: 3px;
}

.wheel-spoke-left {
    top: 50%;
    left: 10%;
    width: 35%;
    height: 6px;
    transform: translateY(-50%);
}

.wheel-spoke-right {
    top: 50%;
    right: 10%;
    width: 35%;
    height: 6px;
    transform: translateY(-50%);
}

.wheel-spoke-bottom {
    bottom: 10%;
    left: 50%;
    width: 6px;
    height: 35%;
    transform: translateX(-50%);
}

/* 右侧操作区 */
.touch-right {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
}

.touch-pedals {
    display: flex;
    gap: 12px;
}

.touch-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
    pointer-events: auto;
    font-family: var(--font-cn);
    font-weight: 600;
}

.throttle-btn {
    width: 65px;
    height: 90px;
    background: linear-gradient(180deg, rgba(0, 230, 118, 0.3), rgba(0, 230, 118, 0.15));
    border: 2px solid rgba(0, 230, 118, 0.4);
    color: var(--accent-green);
    font-size: 0.8rem;
}

.throttle-btn:active, .throttle-btn.pressed {
    background: linear-gradient(180deg, rgba(0, 230, 118, 0.5), rgba(0, 230, 118, 0.3));
    border-color: var(--accent-green);
    box-shadow: 0 0 20px rgba(0, 230, 118, 0.3);
    transform: scale(0.95);
}

.reverse-btn {
    width: 65px;
    height: 90px;
    background: linear-gradient(180deg, rgba(255, 152, 0, 0.3), rgba(255, 152, 0, 0.15));
    border: 2px solid rgba(255, 152, 0, 0.4);
    color: #ff9800;
    font-size: 0.8rem;
}

.reverse-btn:active, .reverse-btn.pressed {
    background: linear-gradient(180deg, rgba(255, 152, 0, 0.5), rgba(255, 152, 0, 0.3));
    border-color: #ff9800;
    box-shadow: 0 0 20px rgba(255, 152, 0, 0.3);
    transform: scale(0.95);
}

.touch-function {
    display: flex;
    gap: 8px;
}

.func-btn {
    width: 50px;
    height: 50px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.65rem;
    letter-spacing: 1px;
}

.func-btn:active, .func-btn.active {
    background: rgba(26, 140, 255, 0.2);
    border-color: var(--primary-color);
    color: var(--primary-light);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .game-title {
        font-size: 1.8rem;
        letter-spacing: 3px;
    }

    .menu-buttons {
        width: 240px;
    }

    .menu-btn {
        padding: 12px 20px;
        font-size: 0.9rem;
    }

    .gauge {
        width: 90px;
        height: 90px;
    }

    .gauge-value {
        font-size: 1.4rem;
    }

    .gauge-needle {
        height: 32px;
    }

    .hud-top-left {
        top: 8px;
        left: 8px;
        gap: 8px;
    }

    .hud-top-right {
        top: 8px;
        right: 8px;
    }

    .hud-info-box {
        padding: 8px 12px;
        min-width: auto;
    }

    .hud-route {
        font-size: 0.75rem;
    }

    .hud-time {
        font-size: 0.85rem;
    }

    .hud-bottom-hints {
        gap: 8px;
        bottom: 8px;
    }

    .hint-item {
        font-size: 0.65rem;
        padding: 4px 6px;
    }

    .touch-controls.active {
        display: flex;
    }

    .steering-wheel-container {
        width: 110px;
        height: 110px;
    }

    .throttle-btn, .reverse-btn {
        width: 55px;
        height: 80px;
    }

    .func-btn {
        width: 44px;
        height: 44px;
        font-size: 0.6rem;
    }

    .route-panel, .settings-panel, .gameover-panel {
        width: 95%;
        max-height: 80vh;
    }

    .pause-buttons {
        width: 200px;
    }

    .pause-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .game-title {
        font-size: 1.5rem;
        letter-spacing: 2px;
    }

    .gauge {
        width: 75px;
        height: 75px;
    }

    .gauge-value {
        font-size: 1.1rem;
    }

    .gauge-unit {
        font-size: 0.5rem;
    }

    .gauge-needle {
        height: 26px;
        width: 2px;
    }

    .steering-wheel-container {
        width: 90px;
        height: 90px;
    }

    .throttle-btn, .reverse-btn {
        width: 48px;
        height: 70px;
        font-size: 0.7rem;
    }
}

@media (max-height: 500px) and (orientation: landscape) {
    .game-title {
        font-size: 1.6rem;
    }

    .menu-container {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
        padding: 20px;
    }

    .menu-header {
        width: 100%;
    }

    .menu-buttons {
        flex-direction: row;
        width: auto;
        flex-wrap: wrap;
        justify-content: center;
    }

    .menu-btn {
        width: auto;
        min-width: 140px;
    }

    .touch-controls.active {
        height: 160px;
    }

    .gauge {
        width: 85px;
        height: 85px;
    }
}

/* 触屏设备显示触屏控制 */
@media (hover: none) and (pointer: coarse) {
    .touch-controls.active {
        display: flex;
    }
}

/* 桌面端隐藏触屏控制 */
@media (hover: hover) and (pointer: fine) {
    .touch-controls {
        display: none !important;
    }
}