/*
Theme Name: 校园外卖主题
Theme URI: https://example.com/campus-delivery
Author: Your Name
Author URI: https://example.com
Description: 一款专为校园外卖官网设计的现代化WordPress主题，完美集成文章、标签、分类等功能
Version: 1.0.0
Requires at least: 5.8
Tested up to: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: campus-delivery
Tags: custom-background, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready
*/

/* ==========================================================================
   通用样式
   ========================================================================== */

:root {
    --primary-color: #FF6B35;
    --secondary-color: #F7931E;
    --accent-color: #4ECDC4;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --bg-light: #F8F9FA;
    --white: #FFFFFF;
    --border-color: #E0E0E0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

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

a:hover {
    color: var(--secondary-color);
}

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

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

/* ==========================================================================
   Header 头部样式
   ========================================================================== */

.site-header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
    max-width: 1400px;
}

.site-branding {
    display: flex;
    align-items: center;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    transition: transform 0.3s ease;
}

.site-logo:hover {
    transform: scale(1.05);
}

.site-logo img {
    height: 55px;
    width: auto;
}

.site-title {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    transition: all 0.3s ease;
}

.site-title a:hover {
    opacity: 0.8;
}

.site-description {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 2px;
}

/* 导航菜单 - 升级版 */
.main-navigation {
    display: flex;
    align-items: center;
}

.main-navigation ul {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    align-items: center;
}

.main-navigation li {
    position: relative;
}

.main-navigation a {
    color: var(--text-dark);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.8rem 1.5rem;
    position: relative;
    display: block;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.main-navigation a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.main-navigation a:hover,
.main-navigation .current-menu-item a {
    color: var(--white);
    transform: translateY(-2px);
}

.main-navigation a:hover::before,
.main-navigation .current-menu-item a::before {
    opacity: 1;
}

.main-navigation a::after {
    display: none;
}

/* 子菜单样式 */
.main-navigation ul ul {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    border-radius: 12px;
    padding: 0.5rem;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-direction: column;
    gap: 0.2rem;
}

.main-navigation li:hover > ul {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-navigation ul ul a {
    padding: 0.6rem 1rem;
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 8px;
    padding: 0.6rem 1.2rem;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--white);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.menu-toggle:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.menu-toggle.active {
    transform: rotate(90deg);
}

/* ==========================================================================
   Hero Section 首页大图 - 增强版
   ========================================================================== */

.hero-section {
    background: linear-gradient(135deg, #FF6B35 0%, #F7931E 50%, #FF6B35 100%);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
    color: var(--white);
    padding: 8rem 0 6rem;
    position: relative;
    overflow: hidden;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,165.3C1248,171,1344,149,1392,138.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.3;
}

/* 动态粒子背景 */
.hero-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
    animation: particleFloat 20s ease-in-out infinite;
}

@keyframes particleFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.05); }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-subtitle {
    font-size: 1.4rem;
    margin-bottom: 3rem;
    opacity: 0.95;
    line-height: 1.6;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.4s both;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: 2px solid transparent;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* ==========================================================================
   Section Header 通用区块标题
   ========================================================================== */

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-dark);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.15rem;
    color: var(--text-light);
    margin-top: 1.5rem;
}

/* ==========================================================================
   Products Section 核心功能板块
   ========================================================================== */

.products-section {
    padding: 6rem 0;
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.product-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(255, 107, 53, 0.15);
    border-color: var(--primary-color);
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-icon-wrapper {
    margin-bottom: 1.5rem;
}

.product-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.3);
    transition: all 0.4s ease;
}

.product-card:hover .product-icon {
    transform: scale(1.1) rotate(5deg);
}

.product-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
    text-align: center;
}

.product-description {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    text-align: center;
    font-size: 0.95rem;
}

.product-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.product-features li {
    padding: 0.6rem 0;
    color: var(--text-dark);
    font-size: 0.95rem;
    position: relative;
    padding-left: 1.5rem;
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
}

/* ==========================================================================
   Advantages Section 核心优势
   ========================================================================== */

.advantages-section {
    padding: 6rem 0;
    background: var(--white);
    position: relative;
    overflow: hidden;
}

.advantages-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 15px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 4px solid transparent;
}

.advantage-item:hover {
    background: var(--white);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary-color);
    transform: translateX(10px);
}

.advantage-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
}

.advantage-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.advantage-content p {
    color: var(--text-light);
    line-height: 1.7;
    margin: 0;
}

/* ==========================================================================
   Blog Section 文章列表
   ========================================================================== */

.blog-section {
    padding: 5rem 0;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.post-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.post-thumbnail {
    height: 250px;
    overflow: hidden;
    position: relative;
}

.post-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.post-card:hover .post-thumbnail img {
    transform: scale(1.1);
}

.post-content {
    padding: 1.5rem;
}

.post-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.post-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.post-title a {
    color: var(--text-dark);
}

.post-title a:hover {
    color: var(--primary-color);
}

.post-excerpt {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.read-more:hover {
    gap: 1rem;
}

/* ==========================================================================
   Footer 底部样式
   ========================================================================== */

.site-footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-widget h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-widget ul {
    list-style: none;
}

.footer-widget ul li {
    margin-bottom: 0.5rem;
}

.footer-widget a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-widget a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

/* ==========================================================================
   Responsive 响应式
   ========================================================================== */

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-navigation ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow);
    }

    .main-navigation.toggled ul {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .posts-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   动画
   ========================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   实用类
   ========================================================================== */

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

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.py-1 { padding-top: 1rem; padding-bottom: 1rem; }
.py-2 { padding-top: 2rem; padding-bottom: 2rem; }
.py-3 { padding-top: 3rem; padding-bottom: 3rem; }