/* ==========================================================================
   冷库宝高端官网样式表 - 极致暗黑拟物态与毛玻璃科技蓝
   ========================================================================== */

/* --- 1. 全局设计系统与变量 --- */
:root {
    --bg-dark: #0b0f19;
    --bg-card: rgba(255, 255, 255, 0.03);
    --border-light: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(59, 130, 246, 0.2);
    
    /* 渐变色系 */
    --grad-blue: linear-gradient(135deg, #3b82f6 0%, #22d3ee 100%);
    --grad-purple: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
    --grad-dark-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
    
    /* 核心色彩 */
    --color-primary: #3b82f6;
    --color-cyan: #22d3ee;
    --color-purple: #818cf8;
    --color-green: #10b981;
    --color-red: #ef4444;
    --color-text-main: #f8fafc;
    --color-text-sub: #94a3b8;
    --color-text-muted: #64748b;
    
    /* 动效与投影 */
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --glow-shadow-blue: 0 8px 32px rgba(59, 130, 246, 0.15);
    --glow-shadow-red: 0 8px 32px rgba(239, 68, 68, 0.15);
    --card-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

/* --- 2. 基础重置 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-dark);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--color-text-main);
    background-color: var(--bg-dark);
    overflow-x: hidden;
    line-height: 1.6;
    position: relative;
}

/* 极简网格底纹叠加 */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.007) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.007) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: 1;
    pointer-events: none;
}

/* --- 3. 极光背景发光粒子 (Aurora Glows) --- */
.aurora-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
    pointer-events: none;
    z-index: 0;
    animation: floatGlow 15s infinite alternate ease-in-out;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    top: -100px;
    left: -150px;
}

.glow-2 {
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, var(--color-purple) 0%, transparent 70%);
    top: 30%;
    right: -200px;
    animation-delay: -5s;
}

.glow-3 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-cyan) 0%, transparent 70%);
    bottom: 10%;
    left: -100px;
    animation-delay: -8s;
}

@keyframes floatGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 80px) scale(1.15); }
}

/* --- 4. 通用排版与网格容器 --- */
.section-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-title {
    font-family: 'Outfit', sans-serif;
    font-size: 38px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--color-text-main);
    line-height: 1.3;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-text-sub);
    font-weight: 400;
}

.gradient-text-blue {
    background: var(--grad-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.gradient-text-purple {
    background: var(--grad-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- 5. 磨砂玻璃卡片 (Glassmorphism Card) --- */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    box-shadow: var(--card-shadow);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.03), transparent);
    transition: 0.5s;
    pointer-events: none;
}

.glass-card:hover::before {
    left: 150%;
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

/* --- 6. 按钮体系 (Buttons) --- */
.btn {
    font-family: 'Inter', sans-serif;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
    gap: 8px;
}

.btn-primary {
    background: var(--grad-blue);
    color: #0b0f19;
    box-shadow: 0 4px 20px rgba(34, 211, 238, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(34, 211, 238, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text-main);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-large {
    font-size: 16px;
    padding: 16px 36px;
}

.btn-block {
    width: 100%;
}

.btn-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

.btn:hover .btn-shine {
    left: 100%;
}

/* --- 7. 悬浮导航栏 (Header) --- */
.header {
    position: fixed;
    top: 20px;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition-smooth);
}

.header-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 14px 28px;
    background: rgba(11, 15, 25, 0.4);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-light);
    border-radius: 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    transition: var(--transition-smooth);
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 10px;
}

.logo-icon {
    font-size: 24px;
    animation: rotateSnow 8s infinite linear;
}

@keyframes rotateSnow {
    100% { transform: rotate(360deg); }
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text-main);
    letter-spacing: -0.5px;
}

.logo-tag {
    font-size: 10px;
    font-weight: 600;
    color: var(--color-cyan);
    background: rgba(34, 211, 238, 0.1);
    padding: 2px 8px;
    border-radius: 10px;
    border: 1px solid rgba(34, 211, 238, 0.2);
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-sub);
    text-decoration: none;
    position: relative;
    padding: 6px 0;
    transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
    color: var(--color-text-main);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--grad-blue);
    transition: var(--transition-smooth);
    border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* 导航吸顶变化 */
.header.scrolled .header-container {
    background: rgba(11, 15, 25, 0.8);
    padding: 10px 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(59, 130, 246, 0.15);
}

/* --- 8. Hero 首屏 (Hero Section) --- */
.hero-section {
    padding-top: 180px;
    padding-bottom: 100px;
    position: relative;
}

.hero-container {
    display: flex;
    align-items: center;
    gap: 48px;
}

.hero-content {
    flex: 1.2;
}

.badge-tech {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 24px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background-color: var(--color-cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-cyan);
    animation: pulseGlow 1.5s infinite alternate;
}

@keyframes pulseGlow {
    100% { transform: scale(1.5); opacity: 0.5; }
}

.badge-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-sub);
    letter-spacing: 0.5px;
}

.hero-title {
    font-family: 'Outfit', sans-serif;
    font-size: 60px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -2px;
    color: var(--color-text-main);
    margin-bottom: 24px;
}

.hero-desc {
    font-size: 17px;
    color: var(--color-text-sub);
    line-height: 1.7;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    border-top: 1px solid var(--border-light);
    padding-top: 32px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-family: 'Outfit', sans-serif;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 4px;
}

.stat-lbl {
    font-size: 13px;
    color: var(--color-text-muted);
}

.hero-showcase {
    flex: 0.9;
    position: relative;
    display: flex;
    justify-content: center;
}

.image-wrapper {
    position: relative;
    width: 100%;
    max-width: 440px;
    animation: floatImage 6s infinite ease-in-out;
}

@keyframes floatImage {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.hero-img {
    width: 100%;
    height: auto;
    border-radius: 30px;
    filter: drop-shadow(0 20px 40px rgba(59, 130, 246, 0.2));
}

.floating-badge {
    position: absolute;
    background: rgba(11, 15, 25, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-light);
    padding: 12px 20px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.badge-icon {
    font-size: 22px;
}

.badge-info {
    display: flex;
    flex-direction: column;
}

.info-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-text-main);
}

.info-sub {
    font-size: 11px;
    color: var(--color-text-muted);
}

.badge-1 {
    top: 25%;
    left: -40px;
}

.badge-2 {
    bottom: 15%;
    right: -20px;
}

/* --- 9. Features 核心优势 --- */
.features-section {
    padding: 100px 0;
    background-color: rgba(11, 15, 25, 0.5);
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 28px;
}

.icon-blue { background: rgba(59, 130, 246, 0.1); border: 1px solid rgba(59, 130, 246, 0.2); }
.icon-purple { background: rgba(129, 140, 248, 0.1); border: 1px solid rgba(129, 140, 248, 0.2); }
.icon-green { background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.2); }
.icon-red { background: rgba(239, 68, 68, 0.1); border: 1px solid rgba(239, 68, 68, 0.2); }

.card-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text-main);
}

.card-desc {
    font-size: 15px;
    color: var(--color-text-sub);
    line-height: 1.6;
    margin-bottom: 28px;
    flex: 1;
}

.card-action {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-cyan);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.card-action .arrow {
    transition: var(--transition-smooth);
}

.card-action:hover {
    color: var(--color-text-main);
}

.card-action:hover .arrow {
    transform: translateX(4px);
}

/* --- 10. Simulator 避坑计算器 --- */
.simulator-section {
    padding: 100px 0;
}

.simulator-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 32px;
    align-items: stretch;
}

.simulator-card {
    padding: 40px;
}

.sim-card-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--color-text-main);
}

.input-group {
    margin-bottom: 28px;
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.label-row label {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-sub);
}

.range-value {
    font-family: 'Outfit', sans-serif;
    font-size: 16px;
    font-weight: 700;
    color: var(--color-cyan);
    background: rgba(34, 211, 238, 0.08);
    padding: 2px 10px;
    border-radius: 8px;
}

/* 自定义滑块 */
.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255,255,255,0.06);
    outline: none;
    transition: var(--transition-smooth);
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-cyan);
    cursor: pointer;
    box-shadow: 0 0 10px var(--color-cyan);
    transition: var(--transition-smooth);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.temp-selectors {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin-top: 8px;
}

.temp-btn {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 10px 4px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.temp-btn .t-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-sub);
}

.temp-btn .t-deg {
    font-size: 10px;
    color: var(--color-text-muted);
}

.temp-btn:hover {
    border-color: rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.04);
}

.temp-btn.active {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--color-primary);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.2);
}

.temp-btn.active .t-name {
    color: var(--color-text-main);
}

.temp-btn.active .t-deg {
    color: var(--color-primary);
}

.pulse-btn {
    animation: subtlePulse 2s infinite alternate ease-in-out;
}

@keyframes subtlePulse {
    100% { box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4); }
}

/* 结果审计面板 */
.result-card {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.result-placeholder {
    text-align: center;
    padding: 40px 0;
}

.placeholder-icon {
    width: 140px;
    margin-bottom: 24px;
    opacity: 0.8;
}

.result-placeholder h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}

.result-placeholder p {
    font-size: 14px;
    color: var(--color-text-muted);
}

.hidden {
    display: none !important;
}

.result-display {
    display: flex;
    flex-direction: column;
    gap: 28px;
    height: 100%;
}

.res-header {
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 16px;
}

.badge-res {
    font-size: 11px;
    font-weight: 700;
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-green);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 3px 10px;
    border-radius: 10px;
}

#res-proj-desc {
    font-size: 20px;
    font-weight: 700;
    margin-top: 12px;
}

.res-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.metric-item {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-light);
    padding: 16px;
    border-radius: 16px;
    text-align: center;
}

.metric-item .m-val {
    font-family: 'Outfit', sans-serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text-main);
    display: block;
    margin-bottom: 4px;
}

.metric-item .m-lbl {
    font-size: 11px;
    color: var(--color-text-muted);
}

.metric-item.highlight-red {
    border-color: rgba(239, 68, 68, 0.2);
    background: rgba(239, 68, 68, 0.04);
}

.metric-item.highlight-red .m-val {
    color: var(--color-red);
}

.res-equipment {
    background: rgba(255,255,255,0.01);
    border: 1px solid var(--border-light);
    padding: 20px;
    border-radius: 16px;
}

.res-equipment h5 {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-cyan);
    margin-bottom: 12px;
}

.res-equipment ul {
    list-style: none;
}

.res-equipment li {
    font-size: 13.5px;
    color: var(--color-text-sub);
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
}

.res-equipment li strong {
    color: var(--color-text-main);
}

/* 图表区域 */
.res-chart-container h5 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
}

.chart {
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: rgba(0,0,0,0.15);
    padding: 16px;
    border-radius: 16px;
    margin-bottom: 12px;
}

.chart-row {
    display: flex;
    align-items: center;
}

.chart-label {
    width: 130px;
    font-size: 12.5px;
    color: var(--color-text-sub);
}

.chart-bar-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
}

.bar {
    height: 16px;
    border-radius: 8px;
    transition: width 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.bar-green {
    background: var(--grad-blue);
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.2);
}

.bar-red {
    background: linear-gradient(90deg, #f87171, #ef4444);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.2);
}

.bar-val {
    font-family: 'Outfit', sans-serif;
    font-size: 13px;
    font-weight: 700;
}

.chart-warning {
    font-size: 12px;
    color: var(--color-text-muted);
}

.res-footer-actions {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 12px;
}

/* --- 11. Warranty 百万维保保障 --- */
.warranty-section {
    padding: 100px 0;
    background-color: rgba(11, 15, 25, 0.5);
}

.warranty-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.badge-warranty {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    color: var(--color-cyan);
    background: rgba(34, 211, 238, 0.1);
    border: 1px solid rgba(34, 211, 238, 0.2);
    padding: 4px 12px;
    border-radius: 12px;
    margin-bottom: 24px;
}

.warranty-points {
    display: flex;
    flex-direction: column;
    gap: 28px;
    margin-top: 36px;
    margin-bottom: 44px;
}

.point-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.point-icon {
    font-size: 26px;
}

.point-text h6 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--color-text-main);
}

.point-text p {
    font-size: 14px;
    color: var(--color-text-sub);
}

/* 模拟大转盘 */
.lottery-card-showcase {
    padding: 32px;
    text-align: center;
}

.showcase-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 32px;
}

.tag-live {
    font-size: 12px;
    color: var(--color-green);
    font-weight: 600;
}

.showcase-title {
    font-size: 15px;
    font-weight: 700;
}

.wheel-stub {
    width: 260px;
    height: 260px;
    margin: 0 auto 32px;
    border-radius: 50%;
    background: #1e1b4b;
    border: 8px solid #312e81;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 30px rgba(49, 46, 129, 0.5);
    overflow: hidden;
}

.wheel-stub-outer {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wheel-stub-inner {
    width: 92%;
    height: 92%;
    border-radius: 50%;
    background: repeating-conic-gradient(
        from 0deg,
        #1e1b4b 0deg 30deg,
        #312e81 30deg 60deg
    );
    opacity: 0.8;
}

.wheel-stub-pointer {
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--grad-blue);
    color: #0b0f19;
    font-weight: 800;
    font-size: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px var(--color-cyan);
    z-index: 10;
}

.wheel-stub-pointer::after {
    content: '';
    position: absolute;
    top: -15px;
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 18px solid var(--color-primary);
}

.showcase-desc {
    font-size: 13.5px;
    color: var(--color-text-sub);
}

/* --- 12. How It Works 使用指南 --- */
.how-section {
    padding: 100px 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.step-card {
    background: rgba(255,255,255,0.01);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 32px;
    position: relative;
    overflow: hidden;
}

.step-num {
    font-family: 'Outfit', sans-serif;
    font-size: 54px;
    font-weight: 800;
    line-height: 1;
    color: rgba(59, 130, 246, 0.05);
    position: absolute;
    top: 20px;
    right: 20px;
    transition: var(--transition-smooth);
}

.step-card:hover .step-num {
    color: rgba(34, 211, 238, 0.15);
    transform: scale(1.1);
}

.step-title {
    font-size: 18px;
    font-weight: 700;
    margin-top: 28px;
    margin-bottom: 12px;
    color: var(--color-text-main);
}

.step-desc {
    font-size: 13.5px;
    color: var(--color-text-sub);
    line-height: 1.5;
}

.step-cta {
    text-align: center;
}

/* --- 13. Footer 页脚 --- */
.footer {
    background: #06080e;
    border-top: 1px solid var(--border-light);
    padding: 80px 0 30px;
}

.footer-container {
    display: grid;
    grid-template-columns: 1.2fr 1.8fr 1fr;
    gap: 64px;
    padding-bottom: 64px;
    border-bottom: 1px solid var(--border-light);
}

.footer-brand .logo {
    margin-bottom: 24px;
}

.brand-desc {
    font-size: 14px;
    color: var(--color-text-sub);
    line-height: 1.6;
    margin-bottom: 28px;
}

.social-tip {
    font-size: 12px;
    color: var(--color-cyan);
    font-weight: 600;
}

.footer-links-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.links-col h6 {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 24px;
}

.links-col a {
    display: block;
    font-size: 13.5px;
    color: var(--color-text-sub);
    text-decoration: none;
    margin-bottom: 14px;
    transition: var(--transition-smooth);
}

.links-col a:hover {
    color: var(--color-cyan);
}

.footer-qr-code {
    display: flex;
    justify-content: flex-end;
}

.qr-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 20px;
    text-align: center;
    display: inline-block;
}

.qr-border {
    padding: 8px;
    background: #ffffff;
    border-radius: 12px;
    margin-bottom: 12px;
}

.placeholder-qr {
    width: 110px;
    height: 110px;
    display: block;
}

.qr-card span {
    font-size: 11px;
    color: var(--color-text-muted);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
}

.copyright {
    font-size: 13px;
    color: var(--color-text-muted);
}

.legal-links {
    display: flex;
    gap: 24px;
}

.legal-links a {
    font-size: 13px;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.legal-links a:hover {
    color: var(--color-cyan);
}

/* --- 14. 微信小程序引流弹窗 (QR Modal) --- */
.qr-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(6, 8, 14, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.qr-modal.active {
    opacity: 1;
    pointer-events: auto;
}

.qr-modal-content {
    background: rgba(18, 24, 38, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 50px 100px rgba(0,0,0,0.6), 0 0 50px rgba(59, 130, 246, 0.1);
    width: 100%;
    max-width: 520px;
    border-radius: 32px;
    padding: 40px;
    position: relative;
    transform: translateY(30px);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.qr-modal.active .qr-modal-content {
    transform: translateY(0);
}

.qr-modal-close {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 32px;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.qr-modal-close:hover {
    color: var(--color-text-main);
}

.qr-modal-header {
    text-align: center;
    margin-bottom: 28px;
}

.qr-modal-header h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.qr-modal-header p {
    font-size: 13.5px;
    color: var(--color-text-sub);
}

.qr-modal-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 28px;
}

.modal-qr-frame {
    background: #ffffff;
    padding: 16px;
    border-radius: 24px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    margin-bottom: 24px;
}

.modal-qr-wrapper {
    position: relative;
    width: 160px;
    height: 160px;
    overflow: hidden;
}

.modal-svg-qr {
    width: 100%;
    height: 100%;
    display: block;
}

/* 扫描光线动效 */
.qr-scan-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-cyan), transparent);
    box-shadow: 0 0 12px var(--color-cyan);
    animation: qrScan 2.5s infinite linear;
}

@keyframes qrScan {
    0% { top: 0%; }
    50% { top: 100%; }
    100% { top: 0%; }
}

.modal-guide-steps {
    width: 100%;
    max-width: 320px;
}

.m-step {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 14px;
    color: var(--color-text-sub);
}

.m-step:last-child {
    margin-bottom: 0;
}

.m-num {
    width: 22px;
    height: 22px;
    background: rgba(34, 211, 238, 0.1);
    color: var(--color-cyan);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

.qr-modal-footer {
    border-top: 1px solid var(--border-light);
    padding-top: 24px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255,255,255,0.01);
    border: 1px solid var(--border-light);
    padding: 12px 20px;
    border-radius: 16px;
    justify-content: center;
}

.contact-card .icon {
    font-size: 20px;
}

.c-info {
    display: flex;
    flex-direction: column;
}

.c-title {
    font-size: 12px;
    color: var(--color-text-muted);
}

.c-phone {
    font-family: 'Outfit', sans-serif;
    font-size: 15px;
    font-weight: 700;
    color: var(--color-cyan);
}

/* ==========================================================================
   新增版块专属奢华样式 - 案例、二手/租赁与AI诊断专家
   ========================================================================== */

/* --- 1. Cases 工程案例库样式 --- */
.cases-section {
    padding: 100px 0;
    position: relative;
}

.cases-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 56px;
}

.case-card {
    padding: 0;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.case-badge, .case-badge-blue, .case-badge-purple {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 11px;
    font-weight: 700;
    color: #0b0f19;
    padding: 4px 14px;
    border-radius: 20px;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
.case-badge { background: var(--grad-blue); }
.case-badge-blue { background: linear-gradient(135deg, #10b981 0%, #34d399 100%); }
.case-badge-purple { background: var(--grad-purple); }

.case-card-img {
    height: 200px;
    background: radial-gradient(circle at center, rgba(34, 211, 238, 0.05) 0%, rgba(11, 15, 25, 0.4) 100%);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* 绘制背景科技感网格底纹 */
.case-card-img::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.005) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.005) 1px, transparent 1px);
    background-size: 20px 20px;
}

.case-placeholder-icon {
    font-size: 64px;
    filter: drop-shadow(0 0 15px rgba(34, 211, 238, 0.3));
    animation: caseFloat 4s infinite ease-in-out;
}

@keyframes caseFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.case-card-body {
    padding: 28px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.case-card-title {
    font-size: 19px;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 12px;
}

.case-card-text {
    font-size: 13.5px;
    color: var(--color-text-sub);
    line-height: 1.5;
    margin-bottom: 24px;
    flex: 1;
}

.case-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-light);
    padding-top: 16px;
    margin-bottom: 24px;
}

.case-card-meta .company {
    font-size: 12px;
    color: var(--color-text-sub);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.c-logo { font-size: 14px; }

.case-card-meta .views {
    font-size: 11px;
    color: var(--color-text-muted);
}

.case-card-actions {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 12px;
}

.btn-sm {
    padding: 10px 16px;
    font-size: 13px;
    border-radius: 20px;
}

.cases-more-cta {
    text-align: center;
}

/* --- 2. Market 二手交易与冷库租赁样式 --- */
.market-section {
    padding: 100px 0;
    background-color: rgba(11, 15, 25, 0.3);
}

.market-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.market-card {
    padding: 44px;
    display: flex;
    flex-direction: column;
}

.market-badge {
    align-self: flex-start;
    font-size: 11px;
    font-weight: 700;
    color: #0b0f19;
    padding: 3px 12px;
    border-radius: 12px;
    margin-bottom: 28px;
}

.badge-green { background: linear-gradient(135deg, #10b981 0%, #34d399 100%); }
.badge-cyan { background: var(--grad-blue); }

.market-card-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 16px;
}

.market-card-desc {
    font-size: 14.5px;
    color: var(--color-text-sub);
    line-height: 1.6;
    margin-bottom: 32px;
    flex: 1;
}

.market-assets-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 36px;
}

.m-asset-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(255,255,255,0.01);
    border: 1px solid var(--border-light);
    padding: 16px 20px;
    border-radius: 16px;
    transition: var(--transition-smooth);
}

.m-asset-item:hover {
    background: rgba(255,255,255,0.02);
    border-color: rgba(255,255,255,0.12);
}

.m-asset-icon {
    font-size: 28px;
}

.m-asset-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.m-asset-text strong {
    font-size: 14.5px;
    color: var(--color-text-main);
}

.m-asset-text span {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* --- 3. AI Tech Diagnosis AI故障诊断样式 --- */
.ai-diagnose-section {
    padding: 100px 0;
    position: relative;
}

.ai-diagnose-layout {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    gap: 56px;
    align-items: center;
}

/* 高仿真聊天界面 */
.ai-chat-showcase {
    padding: 0;
    display: flex;
    flex-direction: column;
    height: 480px;
    border-color: rgba(59, 130, 246, 0.15);
    box-shadow: 0 30px 60px rgba(0,0,0,0.5), 0 0 40px rgba(59, 130, 246, 0.05);
}

.chat-header-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 24px;
    background: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--border-light);
}

.chat-avatar {
    font-size: 24px;
}

.chat-meta {
    display: flex;
    flex-direction: column;
}

.chat-meta .c-name {
    font-size: 14.5px;
    font-weight: 700;
    color: var(--color-text-main);
}

.chat-meta .c-status {
    font-size: 11px;
    color: var(--color-cyan);
}

.chat-scroll-body {
    flex: 1;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-y: auto;
    background: rgba(0,0,0,0.15);
}

.chat-bubble {
    font-size: 13px;
    line-height: 1.5;
    padding: 14px 18px;
    border-radius: 18px;
    max-width: 85%;
    white-space: normal;
}

.bubble-ai {
    align-self: flex-start;
    background: rgba(255, 255, 255, 0.03);
    color: var(--color-text-sub);
    border: 1px solid var(--border-light);
    border-top-left-radius: 4px;
}

.bubble-user {
    align-self: flex-end;
    background: var(--color-primary);
    color: #ffffff;
    border-top-right-radius: 4px;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.chat-input-placeholder {
    padding: 16px 24px;
    background: rgba(255,255,255,0.01);
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-muted);
    font-size: 13px;
}

.chat-input-placeholder .send-icon {
    font-size: 18px;
}

/* AI 介绍面板 */
.badge-ai {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    color: var(--color-purple);
    background: rgba(129, 140, 248, 0.1);
    border: 1px solid rgba(129, 140, 248, 0.2);
    padding: 4px 12px;
    border-radius: 12px;
    margin-bottom: 24px;
}

.ai-info-panel .section-desc {
    font-size: 16px;
    color: var(--color-text-sub);
    line-height: 1.7;
    margin-bottom: 36px;
}

.ai-features-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 44px;
}

.ai-feature-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.ai-feature-item .icon {
    color: var(--color-purple);
    font-weight: 700;
}

.ai-feature-item span {
    font-size: 14px;
    color: var(--color-text-sub);
    line-height: 1.4;
}

.ai-feature-item strong {
    color: var(--color-text-main);
}

/* ==========================================================================
   全响应式断点适配 (Responsive Media Queries)
   ========================================================================== */

/* 中型屏幕 (平板电脑) */
@media (max-width: 1024px) {
    html, body {
        overflow-x: hidden;
        width: 100%;
    }
    
    .section-title { font-size: 32px; }
    
    /* 强力隐藏移动端溢出粒子与定位元素，杜绝横向滚动条 */
    .aurora-glow { display: none !important; }
    .floating-badge { display: none !important; }
    
    /* Hero */
    .hero-container { flex-direction: column; text-align: center; gap: 40px; }
    .hero-title { font-size: 48px; }
    .hero-buttons { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-showcase { width: 100%; max-width: 380px; }
    .image-wrapper { max-width: 100%; }
    
    /* Features */
    .features-grid { grid-template-columns: 1fr; }
    
    /* Cases */
    .cases-gallery { grid-template-columns: 1fr; }
    
    /* Simulator */
    .simulator-layout { grid-template-columns: 1fr; }
    
    /* Market */
    .market-layout { grid-template-columns: 1fr; }
    
    /* AI Diagnose */
    .ai-diagnose-layout { grid-template-columns: 1fr; gap: 48px; }
    
    /* Warranty */
    .warranty-layout { grid-template-columns: 1fr; gap: 48px; }
    .warranty-visual { order: -1; display: flex; justify-content: center; }
}

/* 小型屏幕 (横向手机及平板) */
@media (max-width: 768px) {
    .nav-menu { display: none; } /* 极简响应式，在移动端隐藏宽大导航，核心由 CTA 引导 */
    .header-container { padding: 10px 20px; }
    
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-container { grid-template-columns: 1fr; gap: 40px; }
    .footer-qr-code { justify-content: flex-start; }
}

/* 微型屏幕 (手机竖屏) */
@media (max-width: 480px) {
    .hero-title { font-size: 34px; letter-spacing: -1px; }
    .hero-desc { font-size: 14.5px; }
    .hero-buttons { flex-direction: column; width: 100%; gap: 12px; }
    .btn-large { width: 100%; padding: 14px 24px; font-size: 15px; }
    .hero-stats { gap: 16px; flex-wrap: wrap; justify-content: space-around; }
    
    /* 优化温度选择在窄屏为双列 */
    .temp-selectors { grid-template-columns: repeat(2, 1fr); gap: 6px; }
    .res-metrics { grid-template-columns: 1fr; }
    
    /* 强制移动端避坑计算器输出按钮纵向堆叠，防挤压溢出 */
    .res-footer-actions { grid-template-columns: 1fr; gap: 10px; }
    .res-footer-actions .btn { width: 100%; }
    
    /* 强制移动端工程案例卡片按钮纵向堆叠 */
    .case-card-actions { grid-template-columns: 1fr; gap: 8px; }
    .case-card-actions .btn { width: 100%; }
    
    /* 传统对比图表在窄屏排版自适应 */
    .chart-row { flex-direction: column; align-items: flex-start; gap: 4px; }
    .chart-label { width: 100%; font-size: 12px; margin-bottom: 2px; }
    .chart-bar-wrapper { width: 100%; }
    
    .steps-grid { grid-template-columns: 1fr; }
    
    .footer-links-group { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
    
    .qr-modal-content { padding: 24px 16px; border-radius: 24px; width: 92%; }
    .modal-guide-steps { max-width: 100%; }
}