/* i4 Jade Style (Jade White) */
:root {
    --bg-jade: #F2F7F5; /* 玉白色背景 */
    --primary-green: #00B368; /* 爱思绿 */
    --dark-green: #008F53;
    --text-main: #2C3E50;
    --text-sub: #7F8C8D;
    --white: #FFFFFF;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.8);
    --shadow-soft: 0 10px 40px rgba(0, 179, 104, 0.08);
}

body {
    margin: 0;
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--bg-jade);
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a { text-decoration: none; color: inherit; }

/* Navbar */
.navbar {
    height: 70px;
    background: rgba(242, 247, 245, 0.8);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-symbol {
    width: 32px;
    height: 32px;
    background: var(--primary-green);
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
}

.nav-menu a {
    margin: 0 20px;
    font-weight: 500;
    color: var(--text-sub);
    transition: color 0.2s;
}

.nav-menu a:hover, .nav-menu a.active {
    color: var(--primary-green);
}

.nav-cta {
    padding: 8px 24px;
    border: 1px solid var(--primary-green);
    color: var(--primary-green);
    border-radius: 20px;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-cta:hover {
    background: var(--primary-green);
    color: white;
}

/* Hero */
.hero {
    padding: 100px 0;
    overflow: hidden;
}

.hero-inner {
    display: flex;
    align-items: center;
    gap: 80px;
}

.hero-text { flex: 1; }

.tag-pill {
    display: inline-block;
    background: #E0F2E9;
    color: var(--primary-green);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-text h1 {
    font-size: 56px;
    line-height: 1.1;
    margin-bottom: 24px;
    color: #1a1a1a;
}

.hero-text p {
    font-size: 18px;
    color: var(--text-sub);
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.btn-primary {
    background: var(--primary-green);
    color: white;
    padding: 14px 32px;
    border-radius: 12px;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 179, 104, 0.3);
    transition: transform 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: var(--dark-green);
}

.btn-secondary {
    background: white;
    color: var(--text-main);
    padding: 14px 32px;
    border-radius: 12px;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.2s;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    color: var(--primary-green);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 30px;
}

.stat strong {
    display: block;
    font-size: 24px;
    color: var(--text-main);
}

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

.stat-divider {
    width: 1px;
    height: 30px;
    background: #ddd;
}

/* Hero Visual - Glassmorphism */
.hero-visual {
    flex: 1;
    position: relative;
    height: 500px;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--shadow-soft);
}

.main-glass {
    width: 360px;
    height: 480px;
    padding: 20px;
    position: relative;
    z-index: 10;
}

.glass-header {
    display: flex;
    gap: 6px;
    margin-bottom: 20px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ddd;
}

.device-info {
    text-align: center;
    margin-bottom: 30px;
}

.device-img {
    width: 100px;
    height: 180px;
    background: #333;
    border-radius: 16px;
    margin: 0 auto 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.device-details h3 { font-size: 18px; margin: 0 0 5px 0; }
.device-details p { font-size: 13px; color: var(--text-sub); margin: 0 0 10px 0; }
.battery-tag {
    display: inline-block;
    background: #E0F2E9;
    color: var(--primary-green);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
}

.func-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.func-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-sub);
    padding: 10px 0;
    border-radius: 8px;
    transition: background 0.2s;
}

.func-item.active, .func-item:hover {
    background: white;
    color: var(--primary-green);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.fi { font-size: 20px; }

.float-1 {
    position: absolute;
    top: 60px;
    left: -40px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 20;
    animation: float 4s ease-in-out infinite;
}

.float-2 {
    position: absolute;
    bottom: 80px;
    right: -30px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 20;
    animation: float 4s ease-in-out infinite 2s;
}

.check-text strong { color: var(--primary-green); font-size: 18px; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Features */
.features {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 { font-size: 36px; margin-bottom: 10px; }
.section-title p { color: var(--text-sub); }

.feature-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.jade-card {
    background: white;
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.jade-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-soft);
    border-color: #E0F2E9;
}

.card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: #E0F2E9;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.icon-manage::after { content: "📂"; }
.icon-flash::after { content: "⚡"; }
.icon-check::after { content: "🔍"; }
.icon-tools::after { content: "🔧"; }

.jade-card h3 { margin-bottom: 12px; }
.jade-card p { font-size: 14px; color: var(--text-sub); }

/* Footer */
.footer {
    background: white;
    padding: 60px 0 20px;
    border-top: 1px solid #eee;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-green);
    margin-bottom: 10px;
}

.footer-right a {
    margin-left: 30px;
    color: var(--text-sub);
    font-size: 14px;
}

.footer-right a:hover { color: var(--primary-green); }

.footer-bottom {
    text-align: center;
    color: #ccc;
    font-size: 12px;
    padding-top: 20px;
    border-top: 1px solid #f9f9f9;
}

/* Animations */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s forwards;
}
.delay-2 { animation-delay: 0.2s; }

@keyframes fadeIn {
    to { opacity: 1; }
}