/*
Theme Name: 鸭梨AI官网主题
Theme URI: https://www.yaliai.com/
Author: 鸭梨AI
Author URI: https://www.yaliai.com/
Description: 鸭梨AI产品生态官方网站主题。围绕鸭梨AI写作助手、配套主题、浏览器扩展等产品构建，提供产品展示、用户系统和内容发布功能。符合Google结构化数据标准，支持高度可定制化扩展。
Version: 1.0.0
Requires at least: 5.0
Tested up to: 6.4
Requires PHP: 7.4
License: GPL v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: yali-theme
Tags: blog, one-column, two-columns, custom-logo, custom-menu, featured-images, translation-ready
*/

/* ==========================================================================
   CSS Variables - Design Tokens
   ========================================================================== */

:root {
    /* Brand Colors */
    --yali-primary: #6366f1;
    --yali-primary-dark: #4f46e5;
    --yali-primary-light: #818cf8;
    --yali-primary-rgb: 99, 102, 241;

    /* Secondary Colors */
    --yali-secondary: #0f172a;
    --yali-accent: #22d3ee;
    --yali-accent-rgb: 34, 211, 238;

    /* Neutral Colors */
    --yali-bg: #f8fafc;
    --yali-bg-alt: #f1f5f9;
    --yali-card: #ffffff;
    --yali-border: #e2e8f0;

    /* Text Colors */
    --yali-text: #1e293b;
    --yali-text-muted: #64748b;
    --yali-text-light: #94a3b8;

    /* Functional Colors */
    --yali-success: #22c55e;
    --yali-warning: #f59e0b;
    --yali-error: #ef4444;
    --yali-info: #3b82f6;

    /* Shadows */
    --yali-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --yali-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --yali-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --yali-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Gradients */
    --yali-gradient: linear-gradient(135deg, var(--yali-primary) 0%, var(--yali-primary-dark) 100%);
    --yali-gradient-accent: linear-gradient(135deg, var(--yali-primary) 0%, var(--yali-accent) 100%);

    /* Typography */
    --yali-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --yali-font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

    /* Spacing */
    --yali-container-max: 1280px;
    --yali-container-padding: 1.5rem;

    /* Border Radius */
    --yali-radius-sm: 0.375rem;
    --yali-radius: 0.5rem;
    --yali-radius-lg: 0.75rem;
    --yali-radius-xl: 1rem;
    --yali-radius-full: 9999px;

    /* Transitions */
    --yali-transition: all 0.2s ease;
    --yali-transition-slow: all 0.3s ease;
}



/* ==========================================================================
   CSS Reset & Base Styles
   ========================================================================== */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--yali-font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--yali-text);
    background-color: var(--yali-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--yali-primary);
    text-decoration: none;
    transition: var(--yali-transition);
}

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

button {
    font-family: inherit;
    cursor: pointer;
}

/* ==========================================================================
   Layout - Container
   ========================================================================== */

.container {
    max-width: var(--yali-container-max);
    margin: 0 auto;
    padding: 0 var(--yali-container-padding);
}

.container-narrow {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--yali-container-padding);
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--yali-secondary);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: 1rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--yali-radius);
    border: none;
    transition: var(--yali-transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--yali-gradient);
    color: white;
    box-shadow: var(--yali-shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--yali-shadow-lg);
    color: white;
}

.btn-secondary {
    background: var(--yali-card);
    color: var(--yali-text);
    border: 1px solid var(--yali-border);
}

.btn-secondary:hover {
    background: var(--yali-bg-alt);
    border-color: var(--yali-primary);
    color: var(--yali-primary);
}

.btn-outline {
    background: transparent;
    color: var(--yali-primary);
    border: 2px solid var(--yali-primary);
}

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
    background: var(--yali-card);
    border-radius: var(--yali-radius-lg);
    box-shadow: var(--yali-shadow);
    overflow: hidden;
    transition: var(--yali-transition);
}

.card:hover {
    box-shadow: var(--yali-shadow-lg);
    transform: translateY(-4px);
}

.card-body {
    padding: 1.5rem;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--yali-border);
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--yali-border);
    background: var(--yali-bg-alt);
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--yali-text);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--yali-border);
    border-radius: var(--yali-radius);
    background: var(--yali-card);
    color: var(--yali-text);
    transition: var(--yali-transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--yali-primary);
    box-shadow: 0 0 0 3px rgba(var(--yali-primary-rgb), 0.1);
}

.form-input::placeholder {
    color: var(--yali-text-light);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-error {
    color: var(--yali-error);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ==========================================================================
   Utilities
   ========================================================================== */

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.text-primary {
    color: var(--yali-primary);
}

.text-muted {
    color: var(--yali-text-muted);
}

.text-light {
    color: var(--yali-text-light);
}

.bg-primary {
    background: var(--yali-primary);
}

.bg-gradient {
    background: var(--yali-gradient);
}

.bg-card {
    background: var(--yali-card);
}

.bg-alt {
    background: var(--yali-bg-alt);
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.mt-4 {
    margin-top: 2rem;
}

.mt-5 {
    margin-top: 3rem;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.mb-4 {
    margin-bottom: 2rem;
}

.mb-5 {
    margin-bottom: 3rem;
}

.py-1 {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.py-2 {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.py-3 {
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

.py-4 {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.py-5 {
    padding-top: 3rem;
    padding-bottom: 3rem;
}

.hidden {
    display: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
    :root {
        --yali-container-padding: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }
}