frontend/style.css

/* ============================================
   智能垃圾分类系统 - 高级简约风格 v2
   ============================================ */

/* ----- 变量 ----- */
:root {
    --bg-primary: #0a0a0f;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.07);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-border-hover: rgba(255, 255, 255, 0.12);

    --text-primary: #f0f0f2;
    --text-secondary: rgba(255, 255, 255, 0.55);
    --text-tertiary: rgba(255, 255, 255, 0.3);

    --color-blue: #5b9cf5;
    --color-red: #f56b6b;
    --color-green: #5bd68a;
    --color-gray: #8a8a9a;

    --accent: #5bd68a;
    --accent-glow: rgba(91, 214, 138, 0.2);

    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    --shadow-card: 0 8px 40px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 60px var(--accent-glow);

    --font: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition: 0.4s var(--ease-out);
}

/* ----- 基础重置 ----- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   背景装饰
   ============================================ */
.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.3;
}
.bg-orb--1 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(91, 214, 138, 0.15), transparent);
    top: -120px; right: -100px;
    animation: orbFloat 20s ease-in-out infinite;
}
.bg-orb--2 {
    width: 350px; height: 350px;
    background: radial-gradient(circle, rgba(91, 156, 245, 0.1), transparent);
    bottom: -80px; left: -120px;
    animation: orbFloat 25s ease-in-out infinite reverse;
}
.bg-orb--3 {
    width: 250px; height: 250px;
    background: radial-gradient(circle, rgba(245, 107, 107, 0.06), transparent);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    animation: orbFloat 18s ease-in-out infinite 5s;
}
@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.bg-noise {
    position: fixed;
    inset: 0;
    z-index: 0;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
    pointer-events: none;
}

/* ============================================
   App 容器
   ============================================ */
.app-container {
    max-width: 420px;
    margin: 0 auto;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
    padding: 0 16px;
}

/* ============================================
   头部
   ============================================ */
.app-header {
    padding: 48px 0 8px;
    position: relative;
}
.header-content {
    display: flex;
    align-items: center;
    gap: 14px;
}
.header-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    color: var(--accent);
}
.header-icon svg { width: 22px; height: 22px; }
.header-text h1 {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    line-height: 1.2;
}
.header-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
    font-weight: 400;
    letter-spacing: 0.3px;
}

/* ============================================
   主内容
   ============================================ */
.main-content {
    flex: 1;
    padding: 20px 0 80px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* ============================================
   上传区
   ============================================ */
.upload-section {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
    transition: var(--transition);
}
.upload-section:has(.dragover) {
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
}

.upload-area {
    padding: 24px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* 占位 */
.upload-placeholder {
    width: 100%;
    min-height: 160px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    cursor: pointer;
    transition: var(--transition);
    padding: 28px 20px;
    background: rgba(255,255,255,0.02);
    border: 1.5px dashed rgba(255,255,255,0.08);
    position: relative;
    overflow: hidden;
}
.upload-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 50%), rgba(91,214,138,0.06), transparent);
    opacity: 0;
    transition: opacity 0.4s;
}
.upload-placeholder:hover::before,
.upload-placeholder.dragover::before { opacity: 1; }
.upload-placeholder:hover,
.upload-placeholder.dragover {
    border-color: rgba(91,214,138,0.3);
    background: rgba(255,255,255,0.03);
}

.upload-icon {
    width: 52px; height: 52px;
    color: var(--text-secondary);
    transition: var(--transition);
}
.upload-icon svg { width: 100%; height: 100%; }
.upload-placeholder.dragover .upload-icon {
    color: var(--accent);
    transform: scale(1.08);
}
.upload-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}
.upload-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}
.upload-hint {
    font-size: 0.78rem;
    color: var(--text-tertiary);
}

/* 预览 */
.upload-preview {
    width: 100%;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #000;
    max-height: 280px;
}
.upload-preview img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 280px;
    object-fit: contain;
}
.btn-remove {
    position: absolute;
    top: 10px; right: 10px;
    width: 34px; height: 34px;
    border-radius: 50%;
    border: none;
    background: rgba(0,0,0,0.5);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.btn-remove:active { transform: scale(0.9); }
.btn-remove svg { width: 16px; height: 16px; }

/* 操作按钮组 */
.upload-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.btn-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    position: relative;
    overflow: hidden;
}
.btn-action:hover {
    border-color: var(--glass-border-hover);
    color: var(--text-primary);
    background: var(--bg-card-hover);
}
.btn-action:active { transform: scale(0.97); }
.btn-action-icon {
    width: 18px; height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.btn-action-icon svg { width: 100%; height: 100%; }

/* 提交按钮 */
.btn-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    border: none;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, #2d8a4e, #1a6b3a);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    position: relative;
    overflow: hidden;
    opacity: 0.35;
    transform: translateY(0);
}
.btn-submit:not(:disabled) {
    opacity: 1;
    box-shadow: 0 4px 20px rgba(45, 138, 78, 0.3);
}
.btn-submit:not(:disabled):hover {
    box-shadow: 0 6px 30px rgba(45, 138, 78, 0.4);
    transform: translateY(-1px);
}
.btn-submit:not(:disabled):active { transform: translateY(0) scale(0.98); }
.btn-submit:disabled { cursor: not-allowed; }
.btn-submit-icon {
    width: 18px; height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s var(--ease-out);
}
.btn-submit:not(:disabled):hover .btn-submit-icon {
    transform: translateX(3px);
}
.btn-submit-icon svg { width: 100%; height: 100%; }

/* ============================================
   加载状态
   ============================================ */
.loading-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 48px 20px;
    gap: 20px;
    animation: fadeIn 0.4s var(--ease-out);
}

.loader-ring {
    width: 56px; height: 56px;
    position: relative;
}
.loader-ring-segment {
    width: 100%; height: 100%;
    border: 3px solid transparent;
    border-top-color: var(--accent);
    border-right-color: rgba(91, 214, 138, 0.3);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loader-text {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.loading-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}
.loading-subtitle {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.loading-steps {
    display: flex;
    gap: 20px;
    margin-top: 8px;
}
.loading-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    opacity: 0.3;
    animation: stepPulse 2s ease-in-out infinite;
    animation-delay: calc(var(--i, 0) * 0.6s);
}
.step-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
}
.loading-step span {
    font-size: 0.7rem;
    color: var(--text-secondary);
    white-space: nowrap;
}
@keyframes stepPulse {
    0%, 100% { opacity: 0.3; transform: scale(0.95); }
    50% { opacity: 1; transform: scale(1); }
}

/* ============================================
   结果卡片
   ============================================ */
.result-section {
    display: flex;
    flex-direction: column;
    gap: 14px;
    animation: resultIn 0.6s var(--ease-out);
}

@keyframes resultIn {
    0% { opacity: 0; transform: translateY(24px) scale(0.96); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

.result-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

/* 顶部彩条 */
.result-accent {
    height: 4px;
    transition: background 0.5s var(--ease-out);
}
.bg-blue .result-accent { background: var(--color-blue); }
.bg-red .result-accent { background: var(--color-red); }
.bg-green .result-accent { background: var(--color-green); }
.bg-gray .result-accent { background: var(--color-gray); }

/* 分类徽章 */
.result-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px 20px 16px;
    position: relative;
}
.badge-glow {
    position: absolute;
    width: 80px; height: 80px;
    border-radius: 50%;
    opacity: 0.15;
    transition: background 0.5s var(--ease-out);
    animation: badgePulse 2s ease-in-out infinite;
}
.bg-blue .badge-glow { background: var(--color-blue); }
.bg-red .badge-glow { background: var(--color-red); }
.bg-green .badge-glow { background: var(--color-green); }
.bg-gray .badge-glow { background: var(--color-gray); }
@keyframes badgePulse {
    0%, 100% { transform: scale(1); opacity: 0.15; }
    50% { transform: scale(1.2); opacity: 0.25; }
}

.badge-icon {
    font-size: 1.6rem;
    position: relative;
    z-index: 1;
    animation: iconBounce 0.6s var(--ease-spring) 0.2s both;
}
@keyframes iconBounce {
    0% { transform: scale(0); }
    60% { transform: scale(1.2); }
    100% { transform: scale(1); }
}
.badge-text {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
}
.bg-blue .badge-text { color: var(--color-blue); }
.bg-red .badge-text { color: var(--color-red); }
.bg-green .badge-text { color: var(--color-green); }
.bg-gray .badge-text { color: var(--color-gray); }

/* 🔍 物品识别 */
.identify-section {
    display: none;
    flex-direction: column;
    padding: 4px 20px 8px;
    gap: 8px;
    animation: fadeIn 0.4s var(--ease-out) 0.15s both;
}
.identify-divider-top,
.identify-divider-bottom {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
}
.identify-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}
.identify-badge-icon {
    font-size: 0.85rem;
}
.identify-title {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 500;
}
.identify-result {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 6px 0 2px;
}
.identify-label {
    font-size: 0.72rem;
    color: var(--text-tertiary);
    letter-spacing: 1px;
}
.identify-name-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    max-width: 100%;
}
.identify-icon-display {
    font-size: 1.3rem;
    animation: iconBounce 0.6s var(--ease-spring) 0.25s both;
}
.identify-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}
.identify-confidence-wrap {
    display: flex;
    align-items: center;
    gap: 4px;
}
.identify-confidence-label {
    font-size: 0.68rem;
    color: var(--text-tertiary);
}
.identify-confidence {
    font-size: 0.8rem;
    font-weight: 600;
    transition: color 0.3s var(--ease-out);
}

/* 垃圾桶视觉 */
.bin-section {
    padding: 4px 20px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}
.bin-can {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.bin-can-body {
    width: 72px; height: 100px;
    border-radius: 8px 8px 4px 4px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.5s var(--ease-out);
    animation: binDrop 0.6s var(--ease-spring) 0.3s both;
}
@keyframes binDrop {
    0% { transform: translateY(-30px) scaleY(0.8); opacity: 0; }
    100% { transform: translateY(0) scaleY(1); opacity: 1; }
}
.bin-can-lid {
    position: absolute;
    top: -5px; left: -4px; right: -4px;
    height: 14px;
    border-radius: 4px;
    background: inherit;
    filter: brightness(0.8);
    animation: lidSlide 0.5s var(--ease-spring) 0.5s both;
}
@keyframes lidSlide {
    0% { transform: translateY(-10px) rotate(-5deg); opacity: 0; }
    100% { transform: translateY(0) rotate(0); opacity: 1; }
}
.bin-can-label {
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    text-align: center;
    padding: 2px 6px;
    line-height: 1.2;
}
.bin-can-shadow {
    width: 60px; height: 6px;
    background: rgba(0,0,0,0.2);
    border-radius: 50%;
    margin-top: 4px;
    filter: blur(4px);
    animation: shadowGrow 0.5s var(--ease-out) 0.3s both;
}
@keyframes shadowGrow {
    0% { transform: scaleX(0.5); opacity: 0; }
    100% { transform: scaleX(1); opacity: 1; }
}

/* 垃圾桶颜色 */
.bg-blue .bin-can-body { background: var(--color-blue); }
.bg-red .bin-can-body { background: var(--color-red); }
.bg-green .bin-can-body { background: var(--color-green); }
.bg-gray .bin-can-body { background: var(--color-gray); }

/* 详情文字 */
.bin-details {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
    animation: fadeIn 0.5s var(--ease-out) 0.4s both;
}
.bin-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.5;
}
.bin-examples {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}
.examples-label {
    font-size: 0.72rem;
    color: var(--text-tertiary);
    letter-spacing: 1px;
    text-transform: uppercase;
}
.examples-text {
    font-size: 0.82rem;
    color: var(--text-secondary);
    text-align: center;
}
.bin-tip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.04);
    margin-top: 4px;
}
.tip-icon {
    width: 16px; height: 16px;
    color: var(--text-tertiary);
    flex-shrink: 0;
}
.tip-icon svg { width: 100%; height: 100%; }
.tip-text {
    font-size: 0.78rem;
    color: var(--text-secondary);
    flex: 1;
}

/* 检测详情 */
.detail-section {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,0.04);
    display: flex;
    flex-direction: column;
    gap: 12px;
    animation: fadeIn 0.5s var(--ease-out) 0.5s both;
}
.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.detail-label {
    font-size: 0.82rem;
    color: var(--text-tertiary);
}
.detail-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}
.detail-divider {
    height: 1px;
    background: rgba(255,255,255,0.04);
}

/* 其他可能分类 */
.other-section {
    padding: 16px 20px 20px;
    border-top: 1px solid rgba(255,255,255,0.04);
    animation: fadeIn 0.5s var(--ease-out) 0.6s both;
}
.other-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}
.other-title {
    font-size: 0.82rem;
    color: var(--text-tertiary);
}
.other-badge {
    font-size: 0.68rem;
    padding: 2px 8px;
    border-radius: 20px;
    background: rgba(255,255,255,0.04);
    color: var(--text-tertiary);
    border: 1px solid rgba(255,255,255,0.04);
}
.prediction-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.prediction-item {
    display: flex;
    align-items: center;
    gap: 10px;
    animation: fadeIn 0.4s var(--ease-out) both;
}
.prediction-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    min-width: 64px;
    flex-shrink: 0;
}
.prediction-bar {
    flex: 1;
    height: 4px;
    background: rgba(255,255,255,0.05);
    border-radius: 2px;
    overflow: hidden;
}
.prediction-bar-fill {
    height: 100%;
    border-radius: 2px;
    background: linear-gradient(90deg, rgba(91,214,138,0.4), var(--accent));
    width: 0%;
    transition: width 1s var(--ease-out);
}
.prediction-score {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: right;
}

/* 重新识别按钮 */
.btn-retry {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}
.btn-retry:hover {
    border-color: var(--glass-border-hover);
    color: var(--text-primary);
    background: var(--bg-card-hover);
}
.btn-retry:active { transform: scale(0.98); }
.retry-icon {
    width: 16px; height: 16px;
    transition: transform 0.3s var(--ease-out);
}
.btn-retry:hover .retry-icon { transform: rotate(-90deg); }

/* ============================================
   错误状态
   ============================================ */
.error-section {
    animation: fadeIn 0.3s var(--ease-out);
}
.error-card {
    background: var(--bg-card);
    border: 1px solid rgba(245, 107, 107, 0.15);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
    box-shadow: var(--shadow-card);
}
.error-icon {
    width: 48px; height: 48px;
    color: var(--color-red);
    opacity: 0.7;
}
.error-icon svg { width: 100%; height: 100%; }
.error-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-red);
}
.error-detail {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

/* ============================================
   分类指南
   ============================================ */
.guide-section {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px;
    transition: var(--transition);
}
.guide-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.guide-section-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}
.guide-badge {
    font-size: 0.65rem;
    padding: 2px 8px;
    border-radius: 20px;
    background: rgba(255,255,255,0.04);
    color: var(--text-tertiary);
    border: 1px solid rgba(255,255,255,0.04);
}
.guide-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}
.guide-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 14px;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.04);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.guide-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}
.guide-card-accent {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    transition: background 0.3s;
}
.guide-card[data-color="blue"] .guide-card-accent { background: var(--color-blue); }
.guide-card[data-color="red"] .guide-card-accent { background: var(--color-red); }
.guide-card[data-color="green"] .guide-card-accent { background: var(--color-green); }
.guide-card[data-color="gray"] .guide-card-accent { background: var(--color-gray); }

.guide-icon-wrap {
    font-size: 1.2rem;
    line-height: 1;
}
.guide-body h3 {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}
.guide-card[data-color="blue"] .guide-body h3 { color: var(--color-blue); }
.guide-card[data-color="red"] .guide-body h3 { color: var(--color-red); }
.guide-card[data-color="green"] .guide-body h3 { color: var(--color-green); }
.guide-card[data-color="gray"] .guide-body h3 { color: var(--color-gray); }
.guide-body p {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    line-height: 1.4;
}

/* ============================================
   底部
   ============================================ */
.app-footer {
    text-align: center;
    padding: 20px 0 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.footer-line {
    width: 40px; height: 1px;
    background: rgba(255,255,255,0.08);
}
.app-footer p {
    font-size: 0.72rem;
    color: var(--text-tertiary);
    letter-spacing: 1px;
}

/* ============================================
   涟漪效果
   ============================================ */
.ripple-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 999;
}
.ripple-effect {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    transform: scale(0);
    animation: rippleAnim 0.6s ease-out forwards;
    pointer-events: none;
}
@keyframes rippleAnim {
    to { transform: scale(4); opacity: 0; }
}

/* ============================================
   通用动画
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ============================================
   响应式适配
   ============================================ */
@media (min-width: 480px) {
    .app-container { padding: 0 20px; }
    .app-header { padding-top: 56px; }
}

@media (min-width: 768px) {
    .app-container { max-width: 480px; padding: 0; }
    .guide-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================
   暗色模式（原生就是暗色，仅适配亮色系统）
   ============================================ */
@media (prefers-color-scheme: light) {
    :root {
        --bg-primary: #f5f5f7;
        --bg-card: rgba(255,255,255,0.7);
        --bg-card-hover: rgba(255,255,255,0.85);
        --glass-border: rgba(0,0,0,0.06);
        --glass-border-hover: rgba(0,0,0,0.12);
        --text-primary: #1a1a2e;
        --text-secondary: rgba(0,0,0,0.55);
        --text-tertiary: rgba(0,0,0,0.28);
        --shadow-card: 0 8px 40px rgba(0,0,0,0.06);
        --bg-orb-linear: linear-gradient(135deg, #e8f5e9, #e3f2fd);
    }
    .bg-orb { opacity: 0.15; }
    .bg-orb--1 { background: radial-gradient(circle, rgba(91,214,138,0.12), transparent); }
    .bg-orb--2 { background: radial-gradient(circle, rgba(91,156,245,0.08), transparent); }
    .upload-placeholder { border-color: rgba(0,0,0,0.08); }
    .guide-card { background: rgba(0,0,0,0.02); border-color: rgba(0,0,0,0.04); }
    .guide-card:hover { background: rgba(0,0,0,0.04); }
    .bin-tip { background: rgba(0,0,0,0.02); border-color: rgba(0,0,0,0.04); }
    .ripple-effect { background: rgba(0,0,0,0.1); }
}

/* 工具类 */
.hidden { display: none !important; }

/* ============================================
   垃圾 DNA 知识卡片
   ============================================ */
.dna-section {
    margin-top: 16px;
    padding: 0 16px 4px;
    animation: dnaSlideUp 0.5s ease-out;
}
.dna-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 16px;
    overflow: hidden;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.dna-header {
    display: flex; align-items: center; gap: 8px;
    padding: 14px 16px;
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.dna-icon { font-size: 1.1rem; line-height: 1; }
.dna-title {
    font-size: 0.85rem; font-weight: 600; color: var(--text-primary);
    letter-spacing: 0.02em;
}
.dna-badge {
    margin-left: auto;
    font-size: 0.65rem; color: rgba(255,255,255,0.4);
    background: rgba(255,255,255,0.06);
    padding: 2px 8px; border-radius: 20px; white-space: nowrap;
}
.dna-body { padding: 10px 16px 16px; }
.dna-row {
    display: flex; gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    animation: dnaFadeIn 0.5s ease-out both;
}
.dna-row:last-child { border-bottom: none; }
.dna-row-icon {
    width: 24px; font-size: 0.95rem; flex-shrink: 0;
    text-align: center; padding-top: 1px;
}
.dna-row-content { flex: 1; min-width: 0; }
.dna-row-label {
    font-size: 0.7rem; font-weight: 500; color: rgba(255,255,255,0.35);
    text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 3px;
}
.dna-row-value {
    font-size: 0.82rem; color: var(--text-primary); line-height: 1.5;
}
.dna-row-sub {
    font-size: 0.72rem; color: rgba(255,255,255,0.45);
    line-height: 1.4; margin-top: 2px;
}

/* 各行特色颜色 */
.dna-row-material .dna-row-value { color: var(--color-blue); font-weight: 500; }
.dna-row-decomposition .dna-row-value {
    color: var(--color-yellow); font-weight: 600; font-size: 0.95rem;
}
.dna-row-process .dna-row-value {
    font-size: 0.75rem; color: rgba(255,255,255,0.6); line-height: 1.5;
}
.dna-row-co2 .dna-row-value { color: var(--color-green); font-weight: 500; font-size: 0.8rem; }

/* Tag 标签 */
.dna-row-tags {
    display: flex; flex-wrap: wrap; gap: 5px; margin-top: 2px;
}
.dna-tag {
    display: inline-block;
    font-size: 0.7rem; color: var(--text-primary);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    padding: 3px 8px; border-radius: 12px;
    animation: dnaTagPop 0.35s ease-out both;
    white-space: nowrap;
}

/* 列表样式 */
.dna-tips-list, .dna-facts-list { list-style: none; padding: 0; margin: 2px 0 0; }
.dna-tips-list li, .dna-facts-list li {
    position: relative;
    font-size: 0.75rem; line-height: 1.5;
    padding-left: 14px; margin-bottom: 3px;
    animation: dnaFadeIn 0.4s ease-out both;
}
.dna-tips-list li { color: rgba(255,255,255,0.55); }
.dna-tips-list li::before {
    content: '\2726'; position: absolute; left: 0;
    color: var(--color-blue); font-size: 0.55rem; top: 2px;
}
.dna-facts-list li { color: rgba(255,255,255,0.65); }
.dna-facts-list li::before {
    content: '\25CF'; position: absolute; left: 0;
    color: var(--color-yellow); font-size: 0.4rem; top: 4px;
}

/* 动效 */
@keyframes dnaFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes dnaSlideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes dnaTagPop {
    from { opacity: 0; transform: scale(0.85); }
    to { opacity: 1; transform: scale(1); }
}

/* ============================================
   图鉴 (Collection Atlas)
   ============================================ */
.atlas-section {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 16px 16px 12px;
    animation: fadeIn 0.4s ease-out;
}
.atlas-header {
    display: flex; align-items: center; gap: 8px;
    margin-bottom: 12px;
}
.atlas-title {
    font-size: 0.9rem; font-weight: 700; color: var(--text-primary);
}
.atlas-count {
    font-size: 0.7rem; color: var(--text-tertiary);
    margin-right: auto;
}
.atlas-clear {
    font-size: 0.68rem; padding: 3px 10px;
    border-radius: 12px; border: 1px solid rgba(255,255,255,0.1);
    background: rgba(255,255,255,0.04); color: var(--text-tertiary);
    cursor: pointer; transition: var(--transition);
    font-family: var(--font);
}
.atlas-clear:hover {
    border-color: var(--color-red); color: var(--color-red);
    background: rgba(245,107,107,0.1);
}
.atlas-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    max-height: 400px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}
.atlas-grid::-webkit-scrollbar { width: 3px; }
.atlas-grid::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 3px; }

.atlas-item {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    aspect-ratio: 1;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    cursor: pointer;
    transition: var(--transition);
}
.atlas-item:hover { transform: scale(1.03); border-color: var(--accent); }
.atlas-item img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}
.atlas-item-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 6px 6px 5px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    display: flex;
    flex-direction: column;
    gap: 1px;
}
.atlas-item-cat {
    font-size: 0.55rem; font-weight: 700; color: #fff;
    text-shadow: 0 1px 4px rgba(0,0,0,0.5);
}
.atlas-item-name {
    font-size: 0.6rem; color: rgba(255,255,255,0.8);
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* 空状态 */
.atlas-empty {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 32px 16px;
}
.atlas-empty-icon { font-size: 2rem; opacity: 0.4; }
.atlas-empty-text {
    font-size: 0.78rem; color: var(--text-tertiary);
    text-align: center; line-height: 1.5;
}

/* 亮色模式 */
@media (prefers-color-scheme: light) {
    .atlas-item { border-color: rgba(0,0,0,0.08); }
    .atlas-item-overlay { background: linear-gradient(transparent, rgba(0,0,0,0.6)); }
    .atlas-clear { border-color: rgba(0,0,0,0.1); background: rgba(0,0,0,0.02); }
}

/* ============================================
   每日挑战 — 入口卡片
   ============================================ */
.challenge-entry {
    animation: fadeIn 0.5s ease-out;
}
.challenge-entry-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    background: linear-gradient(135deg, rgba(91, 214, 138, 0.08), rgba(91, 156, 245, 0.08));
    border: 1px solid rgba(91, 214, 138, 0.15);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.challenge-entry-card:hover {
    border-color: rgba(91, 214, 138, 0.35);
    background: linear-gradient(135deg, rgba(91, 214, 138, 0.12), rgba(91, 156, 245, 0.12));
    transform: translateY(-2px);
}
.challenge-entry-card:active { transform: scale(0.98); }
.challenge-entry-icon {
    font-size: 1.8rem;
    width: 48px; height: 48px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.04);
    border-radius: 14px;
    flex-shrink: 0;
}
.challenge-entry-body { flex: 1; min-width: 0; }
.challenge-entry-title {
    font-size: 0.95rem; font-weight: 700; color: var(--text-primary);
    letter-spacing: 0.3px;
    display: flex; align-items: center; gap: 8px;
}
.challenge-entry-badge {
    font-size: 0.6rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--accent), var(--color-blue));
    color: #fff;
    white-space: nowrap;
}
.challenge-entry-desc {
    font-size: 0.75rem; color: var(--text-secondary);
    margin-top: 2px;
}

/* 入口环形进度 */
.challenge-entry-progress {
    position: relative;
    width: 44px; height: 44px;
    flex-shrink: 0;
}
.challenge-entry-ring {
    width: 100%; height: 100%;
    transform: rotate(-90deg);
}
.challenge-entry-pct {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent);
}

/* 亮色模式 */
@media (prefers-color-scheme: light) {
    .challenge-entry-card {
        background: linear-gradient(135deg, rgba(91, 214, 138, 0.06), rgba(91, 156, 245, 0.06));
    }
    .challenge-entry-card:hover {
        background: linear-gradient(135deg, rgba(91, 214, 138, 0.1), rgba(91, 156, 245, 0.1));
    }
}

/* ============================================
   每日挑战 — 结果界面
   ============================================ */
.challenge-result {
    animation: resultIn 0.6s ease-out;
}
.challenge-result-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 28px 20px 20px;
    text-align: center;
    box-shadow: var(--shadow-card);
}

.challenge-result-header {
    margin-bottom: 20px;
}
.challenge-result-icon { font-size: 3rem; margin-bottom: 8px; }
.challenge-result-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}
.challenge-result-sub {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* 统计 */
.challenge-result-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}
.result-stat-icon {
    font-size: 1.2rem;
    line-height: 1;
}
.result-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 14px 8px;
    background: rgba(255,255,255,0.02);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.04);
}
.result-stat-num {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}
.result-stat-label {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* 勋章 */
.challenge-medals {
    margin-bottom: 16px;
}
.medals-title {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-align: left;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}
.medals-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.medal-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: rgba(255,255,255,0.02);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.04);
    animation: medalIn 0.4s ease-out both;
    transition: var(--transition);
}
.medal-item.medal-new {
    border-color: rgba(255, 215, 0, 0.3);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.06), rgba(255, 165, 0, 0.06));
}
.medal-item.medal-locked {
    opacity: 0.4;
}
.medal-icon { font-size: 1.3rem; width: 28px; text-align: center; }
.medal-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    text-align: left;
}
.medal-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
}
.medal-desc {
    font-size: 0.68rem;
    color: var(--text-tertiary);
}
.medal-new-badge {
    font-size: 0.6rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    background: linear-gradient(135deg, #ffd700, #ff8c00);
    color: #000;
    animation: medalNewPulse 1s ease-in-out infinite;
}

@keyframes medalIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}
@keyframes medalNewPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* 分享按钮 */
.challenge-btn-share {
    margin-bottom: 8px;
    border-color: rgba(91, 156, 245, 0.2);
    color: var(--color-blue);
}
.challenge-btn-share:hover {
    border-color: var(--color-blue) !important;
    background: rgba(91, 156, 245, 0.06) !important;
    color: var(--color-blue) !important;
}

/* 亮色模式适配 */
@media (prefers-color-scheme: light) {
    .challenge-entry-card {
        background: linear-gradient(135deg, rgba(91, 214, 138, 0.06), rgba(91, 156, 245, 0.06));
    }
    .challenge-entry-card:hover {
        background: linear-gradient(135deg, rgba(91, 214, 138, 0.1), rgba(91, 156, 245, 0.1));
    }
}

/* ============================================
   识别模式切换 (单物体/多物体)
   ============================================ */
.mode-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}
.mode-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    background: var(--bg-card);
    color: var(--text-tertiary);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    position: relative;
    overflow: hidden;
    opacity: 0.6;
}
.mode-btn:hover {
    border-color: var(--glass-border-hover);
    color: var(--text-secondary);
    opacity: 0.8;
}
.mode-btn:active { transform: scale(0.97); }
.mode-btn--active {
    border-color: var(--accent);
    color: var(--accent);
    opacity: 1;
    background: rgba(91, 214, 138, 0.08);
    box-shadow: 0 0 20px rgba(91, 214, 138, 0.1);
}
.mode-icon { font-size: 1rem; line-height: 1; }

/* ============================================
   Bounding Box 画布
   ============================================ */
.preview-img-wrap {
    position: relative;
    width: 100%;
}
.bbox-canvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}
.bbox-canvas--multi {
    pointer-events: auto;
    cursor: pointer;
}

/* ============================================
   多物体识别结果
   ============================================ */
.multi-result-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
    animation: resultIn 0.6s var(--ease-out);
}
.multi-image-wrap {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #000;
    border: 1px solid var(--glass-border);
}
.multi-image-wrap img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 300px;
    object-fit: contain;
}

/* 物体切换标签 */
.multi-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 4px 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
    -webkit-overflow-scrolling: touch;
}
.multi-tabs::-webkit-scrollbar { height: 3px; }
.multi-tabs::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 3px; }

.multi-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 20px;
    border: 1.5px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.02);
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    font-family: var(--font);
    flex-shrink: 0;
}
.multi-tab:hover {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.15);
}
.multi-tab--active {
    background: rgba(255,255,255,0.06);
    border-color: var(--accent);
    color: var(--text-primary);
}
.multi-tab-index {
    width: 20px; height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

/* 多物体详情卡片 */
.multi-detail-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}
.multi-detail-accent {
    height: 4px;
    transition: background 0.4s var(--ease-out);
}
.multi-detail-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 20px 12px;
}
.multi-detail-card .identify-section {
    display: flex;
}
.multi-dna-section {
    margin: 0 16px;
    animation: dnaSlideUp 0.5s ease-out;
}
.multi-dna-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 14px;
    overflow: hidden;
}

/* ============================================
   碳足迹仪表板
   ============================================ */
.carbon-section {
    animation: fadeIn 0.5s var(--ease-out);
}
.carbon-card {
    background: linear-gradient(135deg, rgba(46, 125, 50, 0.08), rgba(27, 94, 32, 0.05));
    border: 1px solid rgba(76, 175, 80, 0.15);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}
.carbon-card:hover {
    border-color: rgba(76, 175, 80, 0.25);
}
.carbon-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px;
    cursor: pointer;
    user-select: none;
}
.carbon-icon { font-size: 1.3rem; line-height: 1; }
.carbon-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-green);
    flex: 1;
}
.carbon-toggle {
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
.carbon-toggle:hover { color: var(--text-secondary); }
.carbon-toggle--open svg {
    transform: rotate(180deg);
}
.carbon-toggle svg {
    transition: transform 0.3s var(--ease-out);
}

.carbon-body {
    padding: 0 18px 18px;
    overflow: hidden;
    max-height: 800px;
    transition: max-height 0.4s var(--ease-out);
}
.carbon-body--collapsed {
    max-height: 0 !important;
    padding: 0 18px;
}

/* 主要指标 */
.carbon-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    margin-bottom: 16px;
}
.carbon-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 6px;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.04);
    text-align: center;
}
.carbon-metric-value {
    font-size: 1.4rem;
    font-weight: 800;
    line-height: 1.2;
}
.carbon-metric--co2 .carbon-metric-value { color: var(--color-green); }
.carbon-metric--trees .carbon-metric-value { color: #4caf50; }
.carbon-metric--items .carbon-metric-value { color: var(--color-blue); }
.carbon-metric-unit {
    font-size: 0.68rem;
    color: var(--text-tertiary);
    margin-top: 1px;
}
.carbon-metric-label {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    margin-top: 4px;
    letter-spacing: 0.5px;
}

/* 等效对比 */
.carbon-equivalents {
    margin-bottom: 14px;
}
.carbon-equiv-title {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.carbon-equiv-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
}
.carbon-equiv-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(255,255,255,0.02);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.03);
}
.carbon-equiv-icon { font-size: 1rem; width: 24px; text-align: center; }
.carbon-equiv-detail {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* 月份统计 */
.carbon-monthly {
    margin-bottom: 14px;
}
.carbon-monthly-title {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
}
.carbon-bars {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 60px;
    padding: 4px 0;
}
.carbon-bar {
    flex: 1;
    border-radius: 3px 3px 0 0;
    min-height: 4px;
    transition: height 0.6s var(--ease-out);
    position: relative;
    cursor: pointer;
}
.carbon-bar:hover .carbon-bar-tooltip {
    opacity: 1;
    transform: translateY(0);
}
.carbon-bar-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: rgba(0,0,0,0.8);
    color: #fff;
    font-size: 0.6rem;
    padding: 2px 6px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    transition: 0.2s;
    pointer-events: none;
}

/* 成就徽章 */
.carbon-achievements {
    margin-top: 4px;
}
.carbon-achievement-title {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.carbon-achievement-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.carbon-achievement {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border-radius: 16px;
    font-size: 0.72rem;
    font-weight: 500;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    color: var(--text-secondary);
    transition: var(--transition);
    cursor: default;
}
.carbon-achievement--unlocked {
    background: rgba(76, 175, 80, 0.1);
    border-color: rgba(76, 175, 80, 0.2);
    color: var(--color-green);
}
.carbon-achievement--locked {
    opacity: 0.4;
}
.carbon-achievement-icon { font-size: 0.9rem; }
.carbon-achievement-name { font-size: 0.7rem; }

/* 亮色模式适配 */
@media (prefers-color-scheme: light) {
    .mode-btn--active {
        background: rgba(91, 214, 138, 0.1);
    }
    .carbon-card {
        background: linear-gradient(135deg, rgba(76, 175, 80, 0.04), rgba(27, 94, 32, 0.02));
        border-color: rgba(76, 175, 80, 0.12);
    }
    .multi-tab {
        border-color: rgba(0,0,0,0.08);
        background: rgba(0,0,0,0.02);
    }
    .multi-tab--active {
        border-color: var(--accent);
        background: rgba(91, 214, 138, 0.08);
    }
    .carbon-metric { background: rgba(0,0,0,0.02); border-color: rgba(0,0,0,0.04); }
    .carbon-equiv-item { background: rgba(0,0,0,0.01); border-color: rgba(0,0,0,0.03); }
    .carbon-achievement { background: rgba(0,0,0,0.02); border-color: rgba(0,0,0,0.04); }
    .carbon-achievement--unlocked { background: rgba(76, 175, 80, 0.06); }

    /* 游戏亮色模式 */
    .gamecenter-entry-card {
        background: linear-gradient(135deg, rgba(156, 39, 176, 0.04), rgba(103, 58, 183, 0.04));
        border-color: rgba(156, 39, 176, 0.1);
    }
    .gamecenter-entry-card:hover {
        background: linear-gradient(135deg, rgba(156, 39, 176, 0.08), rgba(103, 58, 183, 0.08));
        border-color: rgba(156, 39, 176, 0.2);
    }
    .gamecenter-overlay { background: linear-gradient(160deg, #f0f0f5 0%, #e8e8f0 50%, #e0e8f0 100%); }
    .gamecenter-game-card { background: rgba(255,255,255,0.7); border-color: rgba(0,0,0,0.08); }
    .gamecenter-game-card:hover { background: rgba(255,255,255,0.85); }
    .gamecard-title { color: #1a1a2e; text-shadow: none; }
    .gamecard-desc { color: rgba(0,0,0,0.5); }
    .gamecard-play-btn { background: rgba(0,0,0,0.06); color: var(--text-secondary); }
    .gamecard-play-btn:hover { background: rgba(0,0,0,0.1); }
    .tq-btn { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.08); }
    .tq-item-card { background: rgba(0,0,0,0.02); border-color: rgba(0,0,0,0.06); }
    .tq-feedback { background: rgba(0,0,0,0.04); }
    .tq-result-btn--back { border-color: rgba(0,0,0,0.1); color: var(--text-secondary); }
    .mem-grid .memory-card { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.08); }
}

/* ============================================
   游戏中心 — 入口卡片
   ============================================ */
.gamecenter-entry { animation: fadeIn 0.5s ease-out; }
.gamecenter-entry-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    background: linear-gradient(135deg, rgba(156, 39, 176, 0.08), rgba(103, 58, 183, 0.08));
    border: 1px solid rgba(156, 39, 176, 0.15);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.gamecenter-entry-card:hover {
    border-color: rgba(156, 39, 176, 0.35);
    background: linear-gradient(135deg, rgba(156, 39, 176, 0.12), rgba(103, 58, 183, 0.12));
    transform: translateY(-2px);
}
.gamecenter-entry-card:active { transform: scale(0.98); }
.gamecenter-entry-icon {
    font-size: 1.8rem;
    width: 48px; height: 48px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.04);
    border-radius: 14px;
    flex-shrink: 0;
}
.gamecenter-entry-body { flex: 1; min-width: 0; }
.gamecenter-entry-title {
    font-size: 0.95rem; font-weight: 700; color: var(--text-primary);
    letter-spacing: 0.3px;
}
.gamecenter-entry-desc {
    font-size: 0.75rem; color: var(--text-secondary);
    margin-top: 2px;
}
.gamecenter-entry-arrow {
    color: var(--text-tertiary);
    width: 24px; height: 24px;
    flex-shrink: 0;
    transition: transform 0.3s var(--ease-out);
}
.gamecenter-entry-card:hover .gamecenter-entry-arrow {
    transform: translateX(4px);
}

/* ============================================
   游戏中心 — 主界面
   ============================================ */
.gamecenter-overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: linear-gradient(160deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%);
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.25s var(--ease-out);
    overflow-y: auto;
}
.gamecenter-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    flex-shrink: 0;
}
.gamecenter-back {
    width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.04);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    flex-shrink: 0;
}
.gamecenter-back:hover {
    background: rgba(255,255,255,0.08);
    color: var(--text-primary);
}
.gamecenter-back:active { transform: scale(0.9); }
.gamecenter-header-title {
    font-size: 1rem; font-weight: 700; color: var(--text-primary);
    flex: 1;
}
.gamecenter-coins {
    font-size: 0.82rem;
    font-weight: 600;
    color: #ffd700;
    background: rgba(255, 215, 0, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid rgba(255, 215, 0, 0.15);
    white-space: nowrap;
}
.gamecenter-body {
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    flex: 1;
}

/* 游戏选择卡片 */
.gamecenter-game-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px;
    border-radius: var(--radius-lg);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.10);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.gamecenter-game-card:hover {
    background: rgba(255,255,255,0.09);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
.gamecenter-game-card:active { transform: scale(0.98); }
.gamecard-accent {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
}
.gamecard-icon {
    font-size: 2rem;
    width: 50px; height: 50px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.gamecard-info { flex: 1; min-width: 0; }
.gamecard-title {
    font-size: 1.05rem; font-weight: 800; color: #ffffff;
    margin-bottom: 4px;
    text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}
.gamecard-desc {
    font-size: 0.78rem; color: rgba(255,255,255,0.65);
}
.gamecard-stats {
    text-align: center;
    flex-shrink: 0;
}
.gamecard-stat-value {
    font-size: 1.1rem; font-weight: 800;
    color: var(--accent);
    display: block;
    line-height: 1.2;
}
.gamecard-stat-label {
    font-size: 0.6rem; color: var(--text-tertiary);
    text-transform: uppercase; letter-spacing: 0.5px;
}
.gamecard-play-btn {
    width: 44px; height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem; font-weight: 700; color: var(--accent);
    flex-shrink: 0;
    transition: var(--transition);
}
.gamecenter-game-card:hover .gamecard-play-btn {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* ============================================
   限时分类挑战 — 开始界面
   ============================================ */
.timedquiz-screen {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.2s ease-out;
}
.tq-start { display: flex; flex-direction: column; height: 100%; }
.tq-start-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    flex-shrink: 0;
}
.tq-start-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
    text-align: center;
    gap: 14px;
}
.tq-start-icon { font-size: 3.5rem; animation: iconBounce 0.6s var(--ease-spring); }
.tq-start-title {
    font-size: 1.3rem; font-weight: 800; color: var(--text-primary);
}
.tq-start-desc {
    text-align: left;
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    width: 100%;
    max-width: 320px;
}
.tq-start-desc p {
    font-size: 0.82rem; color: var(--text-secondary);
    padding: 4px 0;
    line-height: 1.6;
}
.tq-start-record {
    font-size: 0.85rem; color: var(--text-tertiary);
    padding: 6px 16px;
    background: rgba(255,215,0,0.06);
    border: 1px solid rgba(255,215,0,0.1);
    border-radius: 20px;
}
.tq-start-record span { color: #ffd700; font-weight: 700; }
.tq-start-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 40px;
    border: none;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #f5a623, #f56b6b);
    color: #fff;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    margin-top: 8px;
    box-shadow: 0 4px 20px rgba(245, 166, 35, 0.3);
}
.tq-start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(245, 166, 35, 0.4);
}
.tq-start-btn:active { transform: scale(0.97); }

/* ============================================
   限时分类挑战 — 游戏界面
   ============================================ */
.tq-game {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 16px 18px;
    gap: 10px;
}
.tq-progress-bar {
    width: 100%;
    height: 3px;
    background: rgba(255,255,255,0.05);
    border-radius: 2px;
    overflow: hidden;
    flex-shrink: 0;
}
.tq-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--color-blue));
    border-radius: 2px;
    transition: width 0.4s var(--ease-out);
    width: 0%;
}
.game-close-btn {
    width: 32px; height: 32px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.1);
    background: rgba(255,255,255,0.04);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    font-family: var(--font);
    line-height: 1;
}
.game-close-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-primary);
    border-color: rgba(255,255,255,0.2);
}
.game-close-btn:active { transform: scale(0.9); }

.tq-hud {
    display: grid;
    grid-template-columns: 32px 1fr 1fr 1fr;
    gap: 6px;
    flex-shrink: 0;
    align-items: center;
}
.tq-hud-item {
    text-align: center;
    font-size: 1.6rem;
    font-weight: 800;
    padding: 6px 0;
    border-radius: var(--radius-sm);
    transition: color 0.3s;
}
.tq-timer { color: var(--accent); }
.tq-timer--warning { color: var(--color-red); animation: tqTimerPulse 0.5s ease-in-out infinite; }
.tq-score { color: var(--color-blue); }
.tq-streak { color: #f5a623; font-size: 1.1rem; }
.tq-hud-labels {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 6px;
    flex-shrink: 0;
    margin-top: -6px;
}
.tq-hud-label {
    text-align: center;
    font-size: 0.65rem;
    color: var(--text-tertiary);
    letter-spacing: 1px;
    text-transform: uppercase;
}
@keyframes tqTimerPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* 物品卡片 */
.tq-item-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 10px 0;
    border-radius: var(--radius-xl);
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    padding: 24px;
    animation: tqItemIn 0.35s var(--ease-out);
}
@keyframes tqItemIn {
    from { opacity: 0; transform: translateY(16px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.tq-item-emoji {
    font-size: 3.5rem;
    line-height: 1;
    animation: iconBounce 0.5s var(--ease-spring);
}
.tq-item-name {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    text-align: center;
}
.tq-item-hint {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    letter-spacing: 2px;
}

/* 四个分类按钮 */
.tq-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    flex-shrink: 0;
}
.tq-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 14px 8px;
    border-radius: var(--radius-md);
    border: 1.5px solid rgba(255,255,255,0.06);
    background: rgba(255,255,255,0.02);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s var(--ease-out);
    font-family: var(--font);
    position: relative;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
}
.tq-btn:active { transform: scale(0.95); }
.tq-btn-icon { font-size: 1.4rem; line-height: 1; }
.tq-btn-label { font-size: 0.78rem; letter-spacing: 0.5px; }

/* 按钮颜色 */
.tq-btn--blue {
    color: var(--color-blue);
    border-color: rgba(91, 156, 245, 0.15);
    background: rgba(91, 156, 245, 0.04);
}
.tq-btn--blue:active,
.tq-btn--blue.tq-btn--correct { background: rgba(91, 156, 245, 0.2); border-color: var(--color-blue); }
.tq-btn--red {
    color: var(--color-red);
    border-color: rgba(245, 107, 107, 0.15);
    background: rgba(245, 107, 107, 0.04);
}
.tq-btn--red:active,
.tq-btn--red.tq-btn--correct { background: rgba(245, 107, 107, 0.2); border-color: var(--color-red); }
.tq-btn--green {
    color: var(--color-green);
    border-color: rgba(91, 214, 138, 0.15);
    background: rgba(91, 214, 138, 0.04);
}
.tq-btn--green:active,
.tq-btn--green.tq-btn--correct { background: rgba(91, 214, 138, 0.2); border-color: var(--color-green); }
.tq-btn--gray {
    color: var(--color-gray);
    border-color: rgba(138, 138, 154, 0.15);
    background: rgba(138, 138, 154, 0.04);
}
.tq-btn--gray:active,
.tq-btn--gray.tq-btn--correct { background: rgba(138, 138, 154, 0.2); border-color: var(--color-gray); }

/* 错误闪烁 */
.tq-btn--wrong {
    animation: tqShake 0.4s ease-out;
}
.tq-btn--wrong.tq-btn--blue { background: rgba(245, 107, 107, 0.2); border-color: var(--color-red); color: var(--color-red); }
.tq-btn--wrong.tq-btn--green { background: rgba(245, 107, 107, 0.2); border-color: var(--color-red); color: var(--color-red); }
.tq-btn--wrong.tq-btn--gray { background: rgba(245, 107, 107, 0.2); border-color: var(--color-red); color: var(--color-red); }
.tq-btn--wrong.tq-btn--red { background: rgba(245, 107, 107, 0.2); border-color: var(--color-red); color: var(--color-red); }

/* 正确答案高亮 */
.tq-btn--show-correct.tq-btn--correct {
    background: rgba(91, 214, 138, 0.2) !important;
    border-color: var(--accent) !important;
    color: var(--accent) !important;
}
@keyframes tqShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-5px); }
    80% { transform: translateX(5px); }
}

/* 反馈条 */
.tq-feedback {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 20px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    background: rgba(10,10,15,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255,255,255,0.06);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    animation: tqFeedbackUp 0.3s var(--ease-out);
    z-index: 10;
}
@keyframes tqFeedbackUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}
.tq-feedback-icon { font-size: 1.5rem; }
.tq-feedback-text {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}
.tq-feedback-sub {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-align: center;
    max-width: 320px;
    line-height: 1.4;
}

/* ============================================
   限时分类挑战 — 结果界面
   ============================================ */
.tq-result { display: flex; flex-direction: column; height: 100%; }
.tq-result-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    flex-shrink: 0;
}
.tq-result-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 24px;
    text-align: center;
    gap: 10px;
}
.tq-result-icon { font-size: 3rem; animation: iconBounce 0.6s var(--ease-spring); }
.tq-result-title {
    font-size: 1.2rem; font-weight: 800; color: var(--text-primary);
}
.tq-result-score {
    font-size: 2rem; font-weight: 900;
    background: linear-gradient(135deg, #f5a623, #f56b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.tq-result-newrecord {
    font-size: 0.9rem;
    font-weight: 700;
    color: #ffd700;
    background: rgba(255,215,0,0.1);
    padding: 4px 16px;
    border-radius: 20px;
    border: 1px solid rgba(255,215,0,0.2);
    animation: medalNewPulse 1s ease-in-out infinite;
}
.tq-result-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    width: 100%;
    max-width: 280px;
    margin: 8px 0;
}
.tq-stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 12px 8px;
    background: rgba(255,255,255,0.02);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.04);
}
.tq-stat-value {
    font-size: 1.3rem; font-weight: 800; color: var(--text-primary);
}
.tq-stat-label {
    font-size: 0.65rem; color: var(--text-tertiary);
    letter-spacing: 1px; text-transform: uppercase;
}
.tq-result-coins {
    font-size: 0.9rem;
    color: #ffd700;
    background: rgba(255,215,0,0.06);
    padding: 6px 18px;
    border-radius: 20px;
    border: 1px solid rgba(255,215,0,0.1);
}
.tq-result-coins span { font-weight: 800; }
.tq-result-buttons {
    display: flex;
    gap: 10px;
    margin-top: 10px;
    width: 100%;
    max-width: 320px;
}
.tq-result-btn {
    flex: 1;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    text-align: center;
    border: none;
}
.tq-result-btn--again {
    background: linear-gradient(135deg, #f5a623, #f56b6b);
    color: #fff;
    box-shadow: 0 4px 16px rgba(245, 166, 35, 0.25);
}
.tq-result-btn--again:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(245, 166, 35, 0.35); }
.tq-result-btn--again:active { transform: scale(0.97); }
.tq-result-btn--back {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.08);
    color: var(--text-secondary);
}
.tq-result-btn--back:hover { border-color: rgba(255,255,255,0.15); color: var(--text-primary); }
.tq-result-btn--back:active { transform: scale(0.97); }

/* ============================================
   垃圾分类连连看 — 开始界面
   ============================================ */
.memory-screen {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.2s ease-out;
}
.mem-start { display: flex; flex-direction: column; height: 100%; }
.mem-start-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    flex-shrink: 0;
}
.mem-start-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
    text-align: center;
    gap: 14px;
}
.mem-start-icon { font-size: 3.5rem; animation: iconBounce 0.6s var(--ease-spring); }
.mem-start-title { font-size: 1.3rem; font-weight: 800; color: var(--text-primary); }
.mem-start-desc {
    text-align: left;
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    width: 100%;
    max-width: 320px;
}
.mem-start-desc p {
    font-size: 0.82rem; color: var(--text-secondary);
    padding: 4px 0; line-height: 1.6;
}
.mem-start-record {
    font-size: 0.85rem; color: var(--text-tertiary);
    padding: 6px 16px;
    background: rgba(91, 156, 245, 0.06);
    border: 1px solid rgba(91, 156, 245, 0.1);
    border-radius: 20px;
}
.mem-start-record span { color: var(--color-blue); font-weight: 700; }

/* HUD */
.mem-game { display: flex; flex-direction: column; padding: 12px 12px 16px; height: 100%; gap: 10px; }
.mem-hud {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 6px;
    flex-shrink: 0;
}
.mem-hud-item {
    text-align: center;
    padding: 8px 4px;
    background: rgba(255,255,255,0.02);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.04);
}
.mem-hud-label {
    font-size: 0.6rem; color: var(--text-tertiary);
    letter-spacing: 1px; text-transform: uppercase;
    display: block;
}
.mem-hud-value {
    font-size: 1.1rem; font-weight: 800; color: var(--text-primary);
    display: block; margin-top: 1px;
}

/* 连连看网格 */
.mem-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    flex: 1;
    align-content: center;
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
}

/* 卡牌 */
.memory-card {
    aspect-ratio: 1;
    perspective: 600px;
    cursor: pointer;
    position: relative;
}
.memory-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.5s var(--ease-out);
    transform-style: preserve-3d;
}
.memory-card--flipped .memory-card-inner,
.memory-card--matched .memory-card-inner {
    transform: rotateY(180deg);
}
.memory-card-front,
.memory-card-back {
    position: absolute;
    inset: 0;
    border-radius: var(--radius-sm);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4px;
    overflow: hidden;
}
.memory-card-front {
    background: linear-gradient(135deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
    border: 1.5px solid rgba(255,255,255,0.06);
    z-index: 2;
}
.memory-card-front::after {
    content: '❓';
    font-size: 1.8rem;
    opacity: 0.3;
}
.memory-card-back {
    transform: rotateY(180deg);
    border: 1.5px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.03);
}
.memory-card--matched .memory-card-inner {
    animation: memMatchPop 0.4s var(--ease-spring);
}
@keyframes memMatchPop {
    0% { transform: rotateY(180deg) scale(1); }
    50% { transform: rotateY(180deg) scale(1.08); }
    100% { transform: rotateY(180deg) scale(1); }
}

.mem-card-item { font-size: 1.5rem; line-height: 1; }
.mem-card-name {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-top: 2px;
    line-height: 1.2;
}
.mem-card-category-icon { font-size: 1.3rem; line-height: 1; }
.mem-card-category-name {
    font-size: 0.6rem;
    font-weight: 700;
    text-align: center;
    margin-top: 2px;
    line-height: 1.2;
}

/* 连连看结果界面 */
.mem-result { display: flex; flex-direction: column; height: 100%; }
.mem-result-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    flex-shrink: 0;
}
.mem-result-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 24px;
    text-align: center;
    gap: 10px;
}
.mem-result-icon { font-size: 3rem; animation: iconBounce 0.6s var(--ease-spring); }
.mem-result-title {
    font-size: 1.2rem; font-weight: 800; color: var(--text-primary);
}
.mem-result-newrecord {
    font-size: 0.9rem; font-weight: 700; color: #ffd700;
    background: rgba(255,215,0,0.1);
    padding: 4px 16px; border-radius: 20px;
    border: 1px solid rgba(255,215,0,0.2);
    animation: medalNewPulse 1s ease-in-out infinite;
}