/**
 * 公共样式 - common.css
 * 适用于无限支付首页模板
 */

/* ============================================
   基础重置
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

:root {
    /* 主题色 */
    --primary: #007AFF;
    --primary-dark: #0056b3;
    --primary-light: #E0F2FF;
    --success: #34C759;
    --warning: #FF9500;
    --danger: #FF3B30;
    --purple: #AF52DE;
    --pink: #FF2D92;
    --teal: #00BCD4;

    /* 文字色 */
    --text-dark: #1D1D1F;
    --text-gray: #6E6E73;
    --text-light: #AEAEB2;
    --text-white: #FFFFFF;

    /* 背景色 */
    --bg-glass: rgba(255, 255, 255, 0.72);
    --bg-glass-heavy: rgba(255, 255, 255, 0.88);
    --glass-border: rgba(255, 255, 255, 0.5);
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 12px 40px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.12);

    /* 圆角 */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-xl: 28px;

    /* 间距 */
    --space-xs: 6px;
    --space-sm: 12px;
    --space-md: 20px;
    --space-lg: 32px;
    --space-xl: 48px;

    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;

    /* 动画 */
    --transition-fast: 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-normal: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-slow: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: #f0f5ff;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ============================================
   链接
   ============================================ */
a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* ============================================
   按钮
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    font-family: var(--font-family);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    white-space: nowrap;
    user-select: none;
    position: relative;
    overflow: hidden;
}

.btn:active {
    transform: scale(0.96);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 17px;
    border-radius: var(--radius-md);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 13px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.25);
}

.btn-primary:hover {
    color: #fff;
    box-shadow: 0 12px 32px rgba(0, 122, 255, 0.35);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: scale(0.96) translateY(0);
}

.btn-outline {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-dark);
    border: 1.5px solid var(--glass-border);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-outline:active {
    transform: scale(0.96) translateY(0);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #248a3d);
    color: #fff;
    box-shadow: 0 8px 24px rgba(52, 199, 89, 0.25);
}

.btn-success:hover {
    color: #fff;
    box-shadow: 0 12px 32px rgba(52, 199, 89, 0.35);
    transform: translateY(-2px);
}

/* ============================================
   容器
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ============================================
   滚动条
   ============================================ */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.12);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.2);
}

/* ============================================
   工具类
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-gray { color: var(--text-gray); }
.text-light { color: var(--text-light); }
.text-white { color: var(--text-white); }

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { display: flex; flex-direction: column; }
.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.gap-3 { gap: var(--space-md); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

.rounded { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: 50%; }

.shadow { box-shadow: var(--shadow-soft); }
.shadow-md { box-shadow: var(--shadow-medium); }
.shadow-hover { box-shadow: var(--shadow-hover); }

.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
}

/* ============================================
   动画
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.92);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes pulse {
    0%, 100% { opacity: 0.4; transform: scale(0.9); }
    50% { opacity: 1; transform: scale(1); }
}

.animate-fade-up {
    animation: fadeInUp 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.animate-fade {
    animation: fadeIn 0.5s ease both;
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

/* ============================================
   响应式 - 基础
   ============================================ */
@media (max-width: 1024px) {
    :root {
        --space-xl: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --space-lg: 24px;
        --space-xl: 32px;
        --radius-lg: 18px;
        --radius-md: 14px;
    }

    body {
        font-size: 15px;
    }

    .btn-lg {
        padding: 14px 28px;
        font-size: 15px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    :root {
        --space-md: 16px;
        --space-lg: 20px;
        --space-xl: 28px;
        --radius-md: 12px;
        --radius-sm: 8px;
    }

    body {
        font-size: 14px;
    }

    .btn-lg {
        padding: 12px 24px;
        font-size: 14px;
    }

    .btn {
        padding: 9px 16px;
        font-size: 13px;
    }
}