/*
 * 星火启元子站共享样式 - 暗色科技风 + 人文温度
 * ai / health / elderly / ask / dot 共用
 * 各子站通过 :root 变量覆盖主题色
 */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&display=swap');

:root {
    --c-primary: #6366f1;
    --c-secondary: #8b5cf6;
    --c-accent: #06b6d4;
    --c-accent-warm: #f59e0b;
    --c-glow: rgba(99, 102, 241, 0.4);
    --grad-text: linear-gradient(135deg, #818cf8 0%, #c084fc 50%, #22d3ee 100%);
    --grad-btn: linear-gradient(135deg, var(--c-primary) 0%, var(--c-secondary) 100%);
    --grad-card-border: linear-gradient(135deg, rgba(99,102,241,0.5), rgba(139,92,246,0.5), rgba(6,182,212,0.5));
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-blur: 16px;
    --shadow-glow: 0 0 30px var(--c-glow);
    --shadow-btn: 0 4px 15px rgba(99,102,241,0.4);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.7;
    color: #cbd5e1;
    background: #0f172a;
    overflow-x: hidden;
}

/* 流动渐变背景 */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(99,102,241,0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(139,92,246,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 40% 80%, rgba(6,182,212,0.08) 0%, transparent 50%);
    animation: meshFloat 20s ease-in-out infinite alternate;
    z-index: -2;
    pointer-events: none;
}

/* 点阵网格 */
body::after {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image: radial-gradient(rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
}

@keyframes meshFloat {
    0%   { transform: scale(1) translate(0, 0); }
    33%  { transform: scale(1.05) translate(-2%, 1%); }
    66%  { transform: scale(0.98) translate(1%, -2%); }
    100% { transform: scale(1.02) translate(-1%, 1%); }
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 毛玻璃导航栏 */
header {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    color: white;
    padding: 0.8rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav ul { display: flex; list-style: none; gap: 0.5rem; }

nav a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s;
    padding: 0.5rem 0.8rem;
    font-size: 0.95rem;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%; right: 50%;
    height: 2px;
    background: var(--grad-btn);
    transition: left 0.3s, right 0.3s;
    border-radius: 1px;
}

nav a:hover { color: #e0e7ff; }
nav a:hover::after { left: 0; right: 0; }

/* Hero */
.hero {
    color: white;
    text-align: center;
    padding: 5rem 0 4rem;
    background: transparent;
    position: relative;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.3;
    background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 40%, #a5b4fc 70%, #818cf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    color: #94a3b8;
    line-height: 1.8;
}

/* 按钮 */
.btn {
    display: inline-block;
    background: var(--grad-btn);
    color: white;
    padding: 14px 32px;
    text-decoration: none;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.15);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: var(--shadow-btn);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.12), transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(99,102,241,0.5);
}
.btn:hover::after { opacity: 1; }

/* 服务区域 */
.services { padding: 4rem 0; }

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* 毛玻璃卡片 */
.service-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad-card-border);
    opacity: 0;
    transition: opacity 0.4s;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: rgba(99,102,241,0.3);
    box-shadow: var(--shadow-glow);
    background: rgba(255,255,255,0.1);
}
.service-card:hover::before { opacity: 1; }

.service-icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
    color: #e0e7ff;
    font-weight: 600;
}

.service-card p {
    color: #94a3b8;
    font-size: 0.95rem;
    line-height: 1.7;
}

/* About 区域 */
.about { padding: 4rem 0; }

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.about-text p { color: #94a3b8; margin-bottom: 1rem; line-height: 1.8; }

.about-image { text-align: center; }
.about-image img {
    max-width: 100%;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

/* Contact 区域 */
.contact {
    padding: 4rem 0;
    background: rgba(99,102,241,0.05);
    border-top: 1px solid var(--glass-border);
    color: white;
    text-align: center;
}
.contact h2 { font-size: 2rem; margin-bottom: 1rem; color: #e0e7ff; }
.contact p { color: #94a3b8; margin-bottom: 1.5rem; }
.contact-info { max-width: 600px; margin: 0 auto; }

/* Footer */
footer {
    background: rgba(15, 23, 42, 0.5);
    border-top: 1px solid var(--glass-border);
    color: #94a3b8;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}
footer p { color: #94a3b8; }

/* 响应式 */
@media (max-width: 768px) {
    .header-content { flex-direction: column; }
    nav ul { margin-top: 0.8rem; flex-wrap: wrap; justify-content: center; }
    nav li { margin: 0; }
    .hero { padding: 3rem 0 2.5rem; }
    .hero h1 { font-size: 1.8rem; }
    .about-content { grid-template-columns: 1fr; }
}

/* 无障碍 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}