/* 
 * 查重独立站 - Liquid Glass & Academic Design System
 * 风格: iPhone 液态玻璃 + 学术衬线字体
 */

@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400..700;1,400..700&family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* iOS 风格核心变量 */
    --ios-blue: #007AFF;
    --ios-green: #34C759;
    --ios-red: #FF3B30;
    --ios-orange: #FF9500;
    --ios-system-bg: #F2F2F7;

    /* 液态玻璃变量 */
    --glass-bg: rgba(255, 255, 255, 0.45);
    --glass-bg-hover: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --glass-blur: blur(20px);

    /* 学术风调色盘 (深邃且专业) */
    --academic-navy: #1A1A2E;
    --academic-gold: #C5A059;
    --academic-text: #2C3E50;
    --academic-serif: 'Lora', 'PingFang SC', serif;
    --academic-sans: 'Inter', 'SF Pro Text', 'PingFang SC', sans-serif;

    /* 统一间距与圆角 */
    --radius-ios: 24px;
    --radius-ios-sm: 16px;
    --container-max: 1100px;
}

/* 基础全局背景 (弥散渐变) */
body {
    background: #f8f9fa;
    background-image:
        radial-gradient(at 0% 0%, hsla(210, 100%, 95%, 1) 0, transparent 50%),
        radial-gradient(at 50% 0%, hsla(225, 100%, 96%, 1) 0, transparent 50%),
        radial-gradient(at 100% 0%, hsla(240, 100%, 95%, 1) 0, transparent 50%);
    background-attachment: fixed;
    color: var(--academic-text);
    font-family: var(--academic-sans);
    -webkit-font-smoothing: antialiased;
}

/* 学术标题样式 */
h1,
h2,
h3,
.academic-title {
    font-family: var(--academic-serif);
    color: var(--academic-navy);
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* 液态玻璃卡片 v2 */
.glass-card-v2 {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-ios);
    box-shadow: var(--glass-shadow);
    padding: 30px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card-v2:hover {
    background: var(--glass-bg-hover);
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.1);
}

/* iOS 胶囊按钮 */
.ios-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    border: none;
    gap: 8px;
}

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

.ios-btn-primary:hover {
    opacity: 0.9;
    transform: scale(0.98);
}

.ios-btn-glass {
    background: rgba(0, 122, 255, 0.1);
    color: var(--ios-blue);
    backdrop-filter: blur(10px);
}

.ios-btn-glass:hover {
    background: rgba(0, 122, 255, 0.2);
}

/* iPhone 全球领先的进度条/指示器 */
.ios-step-indicator {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 40px;
    margin-bottom: 30px;
    position: relative;
}

.ios-step-item {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 2;
    font-size: 13px;
    font-weight: 600;
    color: #8E8E93;
    transition: all 0.3s;
}

.ios-step-item.active {
    color: var(--ios-blue);
}

.ios-step-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #D1D1D6;
    margin: 0 auto 8px;
    transition: all 0.3s;
}

.ios-step-item.active .ios-step-dot {
    background: var(--ios-blue);
    transform: scale(1.5);
    box-shadow: 0 0 10px rgba(0, 122, 255, 0.4);
}

/* 学术标签 */
.academic-badge {
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
}

/* 装饰性背景色块 */
.ambient-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.15) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

@keyframes float {
    0% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(20px, 30px);
    }

    100% {
        transform: translate(0, 0);
    }
}

/* 适配移动端 */
@media (max-width: 768px) {
    .glass-card-v2 {
        padding: 20px;
        border-radius: 20px;
    }
}