/* 保留 Google 字体导入 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

:root {
    --primary: #e11d48;
    --primary-light: #f43f5e;
    --secondary: #f97316;
    --dark: #1e1e2c;
    --light: #fff1f2;
    --gray: #6b7280;
    --gray-light: #f3f4f6;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: #fff;
    color: var(--dark);
    overflow-x: hidden;
}

/* Hero */
.hero-section {
    height: 100vh;
    background: linear-gradient(135deg, rgba(225, 29, 72, 0.9), rgba(249, 115, 22, 0.8)),
                url('https://images.unsplash.com/photo-1576091160399-112ba8d25d1f?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    padding: 0 20px;
    position: relative;
}

.hero-content { max-width: 800px; z-index: 2; }

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.3s forwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.6s forwards;
}

/* Buttons */
.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: white;
    color: var(--primary);
}

.btn-primary:hover {
    background-color: var(--gray-light);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: rgba(255,255,255,0.1);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i { font-size: 1.5rem; color: white; }

@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }
@keyframes bounce {
    0%,20%,50%,80%,100%{ transform: translateY(0) translateX(-50%); }
    40%{ transform: translateY(-10px) translateX(-50%); }
    60%{ transform: translateY(-5px) translateX(-50%); }
}

/* 通用 section/container */
.section { padding: 6rem 2rem; }
.section-title { font-size: 2.5rem; font-weight: 700; text-align: center; margin-bottom: 3rem; color: var(--dark); }
.section-title span { color: var(--primary); }

.container { max-width: 1200px; margin: 0 auto; }

/* header/navbar */
header {
    background-color: rgba(255,255,255,0.95);
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    position: fixed;
    top: 0; left: 0; width: 100%;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.navbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.2rem 2rem; max-width: 1200px; margin: 0 auto;
}

.logo { display:flex; align-items:center; gap:10px; font-weight:700; font-size:1.5rem; color:var(--primary); text-decoration:none; }
.logo i { font-size:1.8rem; }

.nav-links { display:flex; gap:2rem; }

.nav-link { text-decoration:none; color:var(--gray); font-weight:500; padding:0.5rem 1rem; border-radius:12px; transition:all 0.3s ease; position:relative; }
.nav-link:hover, .nav-link.active { color:var(--primary); background-color: rgba(225,29,72,0.08); }
.nav-link.active::after {
    content: ''; position: absolute; bottom: -5px; left:50%; transform:translateX(-50%); width:5px; height:5px; border-radius:50%; background-color:var(--primary);
}

.user-actions { display:flex; align-items:center; gap:1rem; }
.btn-outline { background-color: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background-color: rgba(225,29,72,0.1); }

/* tab 内容区域 */
.tab-content { display:none; padding:2rem; max-width:1200px; margin:0 auto; min-height: calc(100vh - 80px); padding-top: 100px; }
.tab-content.active { display:block; animation: fadeIn 0.5s ease; }
@keyframes fadeIn { from{opacity:0} to{opacity:1} }

/* features/metrics grid */
.features-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(300px,1fr)); gap:2rem; margin-top:2rem; }
.feature-card { background-color:white; border-radius:16px; padding:2.5rem 2rem; box-shadow:0 10px 30px rgba(0,0,0,0.08); transition: all 0.3s ease; text-align:center; opacity:0; transform:translateY(30px); }
.feature-card.visible { opacity:1; transform:translateY(0); transition:all 0.6s ease; }
.feature-card:hover { transform:translateY(-10px); box-shadow:0 15px 40px rgba(0,0,0,0.12); }

.feature-icon { width:80px; height:80px; border-radius:50%; background:linear-gradient(135deg,var(--primary),var(--secondary)); display:flex; align-items:center; justify-content:center; margin:0 auto 1.5rem; color:white; font-size:2rem; }
.feature-title { font-size:1.5rem; font-weight:600; margin-bottom:1rem; color:var(--dark); }
.feature-description { color:var(--gray); line-height:1.6; font-size:1rem; }

/* metrics */
.metrics-section { background-color: var(--light); }
.metrics-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(250px,1fr)); gap:1.5rem; margin-top:2rem; }
.metric-card { background-color:white; border-radius:16px; padding:2rem; box-shadow:0 10px 30px rgba(0,0,0,0.08); transition:all 0.3s ease; text-align:center; opacity:0; transform:translateY(30px); }
.metric-card.visible { opacity:1; transform:translateY(0); transition:all 0.6s ease; }
.metric-card:hover { transform:translateY(-5px); box-shadow:0 15px 40px rgba(0,0,0,0.12); }

.metric-icon { width:60px; height:60px; border-radius:50%; display:flex; align-items:center; justify-content:center; margin:0 auto 1rem; color:white; font-size:1.5rem; }
.heart-rate .metric-icon { background-color: var(--primary); }
.blood-oxygen .metric-icon { background-color: var(--secondary); }
.blood-pressure .metric-icon { background-color: #fb923c; }
.respiration .metric-icon { background-color: #f43f5e; }

.metric-title { font-size:1.2rem; font-weight:600; margin-bottom:0.5rem; color:var(--dark); }
.metric-value { font-size:2.0rem; font-weight:650; margin-bottom:0.5rem; color:var(--primary); }
.metric-description { color:var(--gray); font-size:0.9rem; }

/* 实时测量布局 */
.monitoring-container { display:grid; grid-template-columns: 2fr 1fr; gap:2rem; margin-top:1.5rem; }
.video-container { background-color:white; border-radius:16px; padding:1.5rem; box-shadow:0 10px 30px rgba(0,0,0,0.08); height:500px; display:flex; flex-direction:column; }
.video-placeholder { flex:1; background:linear-gradient(135deg,var(--primary),var(--secondary)); border-radius:12px; display:flex; justify-content:center; align-items:center; color:white; font-size:1.2rem; position:relative; overflow:hidden; }
.video-placeholder::before { content:''; position:absolute; width:150%; height:150%; background:linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent); transform:translateX(-100%); animation: shimmer 2s infinite; }
@keyframes shimmer { 100%{ transform:translateX(100%);} }
.video-placeholder i { font-size:4rem; margin-bottom:1rem; }

.metrics-container { display:flex; flex-direction:column; gap:1.5rem; }
.metric-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:1rem; }

/* 数据分析、洞察、设置、关于 等卡片样式（沿用原样） */
.analytics-container { display:grid; grid-template-columns: 1fr 1fr; gap:2rem; margin-top:1.5rem; }
.chart-container { background-color:white; border-radius:16px; padding:1.5rem; box-shadow:0 10px 30px rgba(0,0,0,0.08); height:300px; }
.chart-placeholder { width:100%; height:100%; background-color:var(--gray-light); border-radius:8px; display:flex; justify-content:center; align-items:center; color:var(--gray); }
.history-container { grid-column:1 / -1; background-color:white; border-radius:16px; padding:1.5rem; box-shadow:0 10px 30px rgba(0,0,0,0.08); margin-top:1rem; }

.insights-container { margin-top:1.5rem; }
.insight-card { background-color:white; border-radius:16px; padding:2rem; box-shadow:0 10px 30px rgba(0,0,0,0.08); margin-bottom:1.5rem; }
.insight-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:1.5rem; }
.score-container { display:flex; align-items:center; gap:1rem; }
.score-circle { display:flex; align-items:center; justify-content:center; width:80px; height:80px; border-radius:50%; background: conic-gradient(var(--primary) 75%, var(--gray-light) 0); position:relative; }
.score-circle::before { content:''; position:absolute; width:60px; height:60px; background-color:white; border-radius:50%; }
.score-value { position:relative; font-size:1.5rem; font-weight:700; color:var(--primary); }

.recommendations { margin-top:1.5rem; }
.recommendation-item { display:flex; gap:1rem; margin-bottom:1rem; padding:1rem; border-radius:12px; background-color: rgba(225,29,72,0.05); }
.recommendation-icon { width:40px; height:40px; border-radius:50%; background:linear-gradient(to right,var(--primary),var(--secondary)); display:flex; align-items:center; justify-content:center; color:white; flex-shrink:0; }

/* 设置、关于、模态框等留白样式 */
.settings-container { display:grid; grid-template-columns:1fr 1fr; gap:2rem; margin-top:1.5rem; }
.setting-card { background-color:white; border-radius:16px; padding:1.5rem; box-shadow:0 10px 30px rgba(0,0,0,0.08); }
.upload-area { border:2px dashed #d1d5db; border-radius:12px; padding:2rem; text-align:center; margin-top:1rem; cursor:pointer; transition:all 0.3s ease; }
.upload-area:hover { border-color:var(--primary); background-color: rgba(225,29,72,0.02); }
.upload-icon { font-size:2.5rem; color:var(--primary); margin-bottom:1rem; }

.about-container { display:grid; grid-template-columns:1fr 1fr; gap:3rem; margin-top:1.5rem; }
.about-card { background-color:white; border-radius:16px; padding:2rem; box-shadow:0 10px 30px rgba(0,0,0,0.08); }
.team-member { display:flex; gap:1rem; margin-bottom:1.5rem; }
.member-avatar { width:60px; height:60px; border-radius:50%; background:linear-gradient(to right,var(--primary),var(--secondary)); display:flex; align-items:center; justify-content:center; color:white; font-weight:600; font-size:1.2rem; flex-shrink:0; }

/* 模态框 */
.auth-modal {
    position: fixed; top:0; left:0; width:100%; height:100%;
    background-color: rgba(0,0,0,0.5); display:flex; justify-content:center; align-items:center;
    z-index:1000; opacity:0; visibility:hidden; transition: all 0.3s ease;
}
.auth-modal.active { opacity:1; visibility:visible; }
.auth-container { background-color:white; border-radius:16px; width:400px; max-width:90%; box-shadow:0 20px 60px rgba(0,0,0,0.2); transform:translateY(20px); transition:transform 0.4s ease; animation: modal-in 0.3s ease-out forwards; }
.auth-modal.active .auth-container { transform: translateY(0); }
@keyframes modal-in { from { transform: translateY(20px); opacity:0 } to { transform: translateY(0); opacity:1 } }

.auth-tabs { display:flex; border-bottom:1px solid #e5e7eb; }
.auth-tab { flex:1; text-align:center; padding:1.2rem; cursor:pointer; font-weight:500; transition: all 0.3s ease; color:var(--gray); }
.auth-tab.active { color:var(--primary); border-bottom:2px solid var(--primary); }
.auth-content { padding:2rem; }
.auth-form { display:flex; flex-direction:column; gap:1.2rem; }
.form-group { display:flex; flex-direction:column; gap:0.5rem; }
.form-label { font-weight:500; font-size:0.9rem; color:#374151; }
.form-input { padding:0.8rem 1rem; border:1px solid #d1d5db; border-radius:12px; font-size:1rem; transition: all 0.3s ease; }
.form-input:focus { outline:none; border-color:var(--primary); box-shadow: 0 0 0 3px rgba(225,29,72,0.1); }
.auth-footer { text-align:center; margin-top:1rem; font-size:0.9rem; color:var(--gray); }
.auth-link { color:var(--primary); text-decoration:none; font-weight:500; }

/* 响应式 */
@media (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.2rem; }
    .monitoring-container, .analytics-container, .settings-container, .about-container { grid-template-columns: 1fr; }
    .nav-links { display: none; }
}
/* =========================================
   实时监测页面专用样式 (2025 Visual Upgrade)
   ========================================= */

/* 1. 主布局容器 */
.monitoring-main-layout {
    display: flex;
    gap: 20px;
    align-items: stretch;
    margin-top: 20px;
}

/* 2. 左侧视频区域美化 */
.video-column {
    flex: 1 1 48%;
    display: flex;
    flex-direction: column;
}

.video-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 480px; /* 增加高度以匹配右侧指标区 */
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(225, 29, 72, 0.15);
    background: linear-gradient(135deg, #fb923c 0%, #e11d48 100%); /* 橙色到红色的唯美渐变 */
}

/* 视频元素 */
#video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    position: relative;
    z-index: 10;
    opacity: 0; /* 默认隐藏，由JS控制淡入 */
    transition: opacity 0.6s ease-in-out;
}

#video.active {
    opacity: 1;
}

/* 视频未启动时的占位内容 */
.video-placeholder-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 5;
    width: 100%;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.video-placeholder-content i {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    animation: pulse-slow 3s infinite;
}

.video-placeholder-content p {
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

@keyframes pulse-slow {
    0%, 100% { transform: scale(1); opacity: 0.9; }
    50% { transform: scale(1.05); opacity: 1; }
}

/* 左上角人脸/状态悬浮标签 */
.video-overlay-badge {
    position: absolute;
    top: 15px;         /* 稍微靠边一点 */
    left: 15px;
    z-index: 20;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 6px 12px; /* 减小内边距 */
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(255,255,255,0.6);
}

.video-overlay-badge i {
    color: var(--primary); /* 或 #6b7280 */
    font-size: 1rem;       /* 减小图标 */
}

.video-overlay-badge span {
    color: #374151;
    font-weight: 600;
    font-size: 0.85rem;    /* 减小字体 */
}

/* 3. 右侧指标区域美化 */
.metrics-column {
    flex: 1 1 52%;
    display: flex;
    flex-direction: column;
}

#metricsGrid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    height: 100%;
}

/* 卡片容器 */
#metricsGrid .metric-card {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 4px 16px rgba(0,0,0,0.02);
    border: 1px solid rgba(243, 244, 246, 0.8);
    transition: transform 0.2s ease;
    /* 确保内容垂直居中 */
    justify-content: flex-start; 
}

#metricsGrid .metric-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.05);
}

/* 图标容器 */
#metricsGrid .metric-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: white;
    font-size: 1.4rem;
    flex-shrink: 0;
    margin-right: 18px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

/* 指标特定颜色背景 (使用鲜艳的渐变) */
#metricsGrid .heart-rate .metric-icon { background: linear-gradient(135deg, #ef4444, #dc2626); }
#metricsGrid .blood-oxygen .metric-icon { background: linear-gradient(135deg, #f97316, #ea580c); }
#metricsGrid .blood-pressure .metric-icon { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
#metricsGrid .respiration .metric-icon { background: linear-gradient(135deg, #10b981, #059669); }
#metricsGrid .attention .metric-icon { background: linear-gradient(135deg, #06b6d4, #0891b2); }
#metricsGrid .relaxation .metric-icon { background: linear-gradient(135deg, #84cc16, #65a30d); }

#metricsGrid .metric-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

#metricsGrid .metric-title {
    font-size: 0.9rem;
    color: #64748b;
    font-weight: 600;
    margin-bottom: 4px;
}

/* 数值放大且变红 */
#metricsGrid .metric-value {
    font-size: 1.8rem;       /* 32px */
    font-weight: 800;
    color: #e11d48;        /* 统一使用品牌红 */
    line-height: 1;
    font-family: 'Inter', sans-serif;
    display: flex;
    align-items: baseline;
    gap: 3px;
}

/* 单位字体微调 */
#metricsGrid .metric-value span {
    font-size: 0.7rem !important;
    font-weight: 600 !important;
    color: #94a3b8;
    text-transform: uppercase;
}

/* 情感标签行 */
.video-emotion-row {
    grid-column: 1 / -1;
}

.video-emotion-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    padding-top: 4px;
}

.video-emotion-tags .tag {
    padding: 8px 16px;
    border-radius: 50px;
    background: #f1f5f9;
    font-size: 0.9rem;
    color: #475569;
    font-weight: 500;
    border: 1px solid #e2e8f0;
}

/* 响应式适配 */
@media (max-width: 900px) {
    .monitoring-main-layout { flex-direction: column; }
    .video-wrapper { min-height: 350px; }
    #metricsGrid .metric-value { font-size: 1.6rem; }
    #metricsGrid .metric-icon { width: 50px; height: 50px; font-size: 1.2rem; }
}