/**
 * Edu Theme - 全局主样式表
 *
 * 品牌色变量由 output-css.php 通过 :root 动态注入。
 * 此文件定义全局布局、组件、排版、响应式。
 *
 * @package Edu_Theme
 * @since 2.0.0
 */

/* ==================== 全局重置 ==================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
    font-family: var(--edu-font);
    font-size: 16px; line-height: 1.7; color: var(--edu-text);
    background: var(--edu-white); overflow-x: hidden;
    -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--edu-cta); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--edu-gold); }

/* ==================== 排版 ==================== */
.edu-section-title {
    font-size: 1.75rem; font-weight: 700; color: var(--edu-primary);
    text-align: center; margin-bottom: 0.5rem; line-height: 1.3;
}
.edu-section-subtitle {
    font-size: 1rem; color: var(--edu-text-muted); text-align: center;
    max-width: 640px; margin: 0 auto 3rem; line-height: 1.6;
}

/* ==================== 容器 ==================== */
.edu-container {
    max-width: var(--edu-container);
    margin: 0 auto; padding: 0 24px;
}

/* ==================== 区块间距 ==================== */
.edu-section {
    padding: var(--edu-section-gap) 0;
}
.edu-section--dark {
    background: var(--edu-primary); color: rgba(255,255,255,0.9);
}
.edu-section--dark .edu-section-title { color: #fff; }
.edu-section--dark .edu-section-subtitle { color: rgba(255,255,255,0.6); }
.edu-section--light { background: var(--edu-bg-light); }
.edu-section--warm { background: var(--edu-bg-warm); }

/* ==================== 按钮系统 ==================== */
.edu-btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 8px; padding: 12px 28px; font-size: 1rem; font-weight: 600;
    border-radius: var(--edu-radius-sm); border: 2px solid transparent;
    cursor: pointer; transition: all 0.3s; text-decoration: none;
    min-height: 44px; min-width: 44px; line-height: 1.2;
    position: relative; overflow: hidden;
}
.edu-btn::after {
    content: ''; position: absolute; top: 50%; left: 50%;
    width: 0; height: 0; border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: translate(-50%, -50%); transition: width 0.6s, height 0.6s;
}
.edu-btn:hover::after { width: 300px; height: 300px; }
.edu-btn--primary { background: var(--edu-cta); color: #fff; border-color: var(--edu-cta); }
.edu-btn--primary:hover { background: #0052cc; border-color: #0052cc; color: #fff; }
.edu-btn--outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.4); }
.edu-btn--outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; }
.edu-btn--gold { background: var(--edu-gold); color: var(--edu-primary); border-color: var(--edu-gold); }
.edu-btn--gold:hover { background: #b8923b; border-color: #b8923b; color: var(--edu-primary); }
.edu-btn--orange { background: var(--edu-orange); color: #fff; border-color: var(--edu-orange); }
.edu-btn--orange:hover { background: #d68910; border-color: #d68910; color: #fff; }
.edu-btn--lg { padding: 16px 36px; font-size: 1.125rem; }
.edu-btn--sm { padding: 8px 16px; font-size: 0.85rem; min-height: 36px; }

/* ==================== 卡片 ==================== */
.edu-card {
    background: #fff; border-radius: var(--edu-radius);
    box-shadow: var(--edu-shadow); transition: all 0.3s ease;
    overflow: hidden;
}
.edu-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--edu-shadow-hover);
}
.edu-card__body { padding: 24px; }
.edu-card__title { font-size: 1.125rem; font-weight: 600; margin-bottom: 8px; color: var(--edu-primary); }

/* ==================== 网格布局 ==================== */
.edu-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.edu-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.edu-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* ==================== 数字统计 ==================== */
.edu-counter-section__grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center;
}
.edu-counter-item { padding: 24px 16px; }
.edu-counter-item__number {
    font-size: 2.5rem; font-weight: 800; color: var(--edu-gold);
    line-height: 1.1; margin-bottom: 8px;
}
.edu-counter-item__number span { font-size: 1.5rem; }
.edu-counter-item__label {
    font-size: 0.875rem; color: rgba(255,255,255,0.6);
    text-transform: uppercase; letter-spacing: 0.05em;
}

/* ==================== 表单 ==================== */
.edu-form-group { margin-bottom: 20px; }
.edu-form-group label { display: block; font-weight: 500; margin-bottom: 6px; font-size: 0.875rem; }
.edu-form-control {
    width: 100%; padding: 10px 14px; border: 1.5px solid var(--edu-bg-light);
    border-radius: var(--edu-radius-sm); font-size: 1rem; font-family: var(--edu-font);
    transition: border-color 0.2s; background: #fff;
}
.edu-form-control:focus { outline: none; border-color: var(--edu-cta); box-shadow: 0 0 0 3px rgba(0,102,255,0.1); }
.edu-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ==================== 图片占位 ==================== */
.edu-img-placeholder {
    background: linear-gradient(135deg, var(--edu-tech-blue), var(--edu-primary));
    display: flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,0.4); font-size: 0.8rem; text-align: center;
    min-height: 200px; position: relative; overflow: hidden;
}
.edu-img-placeholder::before {
    content: ''; position: absolute; inset: 0;
    background: repeating-linear-gradient(
        45deg, transparent, transparent 10px,
        rgba(255,255,255,0.03) 10px, rgba(255,255,255,0.03) 20px
    );
}
.edu-img-placeholder__text {
    position: relative; z-index: 1; padding: 16px;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
}

/* ==================== 标签/徽章 ==================== */
.edu-badge {
    display: inline-flex; align-items: center; padding: 2px 10px;
    font-size: 0.75rem; font-weight: 600; border-radius: 999px;
    letter-spacing: 0.02em;
}
.edu-badge--gold { background: rgba(201,168,76,0.15); color: var(--edu-gold); }
.edu-badge--blue { background: rgba(0,102,255,0.1); color: var(--edu-cta); }
.edu-badge--green { background: rgba(0,168,107,0.1); color: var(--edu-green); }
.edu-badge--orange { background: rgba(243,156,18,0.1); color: var(--edu-orange); }

/* ==================== 页面 Hero ==================== */
.edu-page-hero {
    padding: 80px 0 64px; text-align: center; position: relative; overflow: hidden;
}
.edu-page-hero--coding { background: linear-gradient(135deg, var(--edu-primary), var(--edu-tech-blue)); }
.edu-page-hero--k12 { background: linear-gradient(135deg, var(--edu-cta), #0044cc); }
.edu-page-hero--homework { background: linear-gradient(135deg, #e67e22, var(--edu-orange)); }
.edu-page-hero--about { background: linear-gradient(135deg, var(--edu-primary), #162d50); }
.edu-page-hero__title {
    font-size: 2.5rem; font-weight: 800; color: #fff; margin-bottom: 12px; line-height: 1.2;
}
.edu-page-hero__desc {
    font-size: 1.125rem; color: rgba(255,255,255,0.75); max-width: 600px; margin: 0 auto;
}

/* ==================== 联系区块 ==================== */
.edu-contact-block {
    display: flex; flex-direction: column; gap: 12px;
}
.edu-contact-block__item {
    display: flex; align-items: center; gap: 10px; color: var(--edu-text-muted);
}
.edu-contact-block__item a { color: var(--edu-cta); text-decoration: none; }
.edu-contact-block__item svg { color: var(--edu-gold); flex-shrink: 0; }
.edu-contact-block__qr { text-align: center; padding-top: 12px; }
.edu-contact-block__qr img { margin: 0 auto 8px; border-radius: 8px; }
.edu-contact-block__qr span { font-size: 0.75rem; color: var(--edu-text-muted); }

/* ==================== 加载状态 ==================== */
.edu-loading {
    display: inline-flex; align-items: center; gap: 8px; color: var(--edu-text-muted);
    font-size: 0.875rem;
}
.edu-loading::before {
    content: ''; width: 16px; height: 16px; border: 2px solid currentColor;
    border-right-color: transparent; border-radius: 50%;
    animation: edu-spin 0.6s linear infinite;
}
@keyframes edu-spin { to { transform: rotate(360deg); } }

/* ==================== 空状态 ==================== */
.edu-empty {
    text-align: center; padding: 48px 16px; color: var(--edu-text-muted);
}

/* ==================== 成绩卡片 ==================== */
.edu-score-card {
    background: #fff;
    border-radius: 8px;
    padding: 0;
    overflow: hidden;
}
.edu-score-card__header {
    padding: 16px 20px;
    border-bottom: 1px solid #eee;
}
.edu-score-card__header h4 {
    margin: 0;
    font-size: 1rem;
    color: var(--edu-primary);
}
.edu-score-card__body {
    padding: 20px;
}
.edu-score-card__empty {
    color: var(--edu-text-muted);
    font-size: 0.9rem;
    margin: 0;
}
.edu-score-card--placeholder .edu-score-card__body {
    padding: 32px 20px;
    text-align: center;
}

/* ==================== 媒体报导 ==================== */
.edu-media-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 700px;
    margin: 0 auto;
}
.edu-media-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--edu-shadow);
    flex-wrap: wrap;
}
.edu-media-item__source {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--edu-primary);
    white-space: nowrap;
}
.edu-media-item__title {
    flex: 1;
    font-size: 0.95rem;
    color: var(--edu-text);
    min-width: 0;
}
.edu-media-item__title[href] {
    color: var(--edu-cta);
    text-decoration: none;
}
.edu-media-item__title[href]:hover {
    color: var(--edu-gold);
}
.edu-media-item__date {
    font-size: 0.8rem;
    color: #999;
    white-space: nowrap;
}

/* ==================== 面包屑导航 ==================== */
.edu-breadcrumb {
    max-width: var(--edu-container);
    margin: 0 auto;
    padding: 16px 24px;
    font-size: 0.85rem;
    color: var(--edu-text-muted);
}
.edu-breadcrumb a {
    color: var(--edu-text-muted);
    text-decoration: none;
    transition: color 0.2s;
}
.edu-breadcrumb a:hover {
    color: var(--edu-gold);
}
.edu-breadcrumb__sep {
    margin: 0 8px;
    color: #ccc;
}
.edu-breadcrumb span[aria-current="page"] {
    color: var(--edu-primary);
    font-weight: 500;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .edu-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .edu-section { --edu-section-gap: 64px; }
}

@media (max-width: 768px) {
    .edu-section { --edu-section-gap: 48px; }
    .edu-grid-3 { grid-template-columns: 1fr 1fr; }
    .edu-grid-4 { grid-template-columns: 1fr 1fr; }
    .edu-grid-2 { grid-template-columns: 1fr; }
    .edu-counter-section__grid { grid-template-columns: repeat(2, 1fr); }
    .edu-page-hero__title { font-size: 1.75rem; }
    .edu-page-hero__desc { font-size: 1rem; }
    .edu-section-title { font-size: 1.375rem; }
    .edu-form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .edu-grid-3, .edu-grid-4 { grid-template-columns: 1fr; }
    .edu-counter-section__grid { grid-template-columns: 1fr 1fr; gap: 16px; }
    .edu-counter-item__number { font-size: 2rem; }
}

/* ==================== 动画工具类 ==================== */
.edu-animate { opacity: 0; transform: translateY(30px); transition: opacity 0.6s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.6s cubic-bezier(0.22, 0.61, 0.36, 1); }
.edu-animate--visible { opacity: 1; transform: translateY(0); }
.edu-animate--delay-1 { transition-delay: 0.1s; }
.edu-animate--delay-2 { transition-delay: 0.2s; }
.edu-animate--delay-3 { transition-delay: 0.3s; }
.edu-animate--delay-4 { transition-delay: 0.4s; }

/* ==================== 可访问性 ==================== */
.edu-sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

/* ==================== 课程卡片链接 ==================== */
.edu-course-card__link {
    display: block; color: inherit; text-decoration: none;
}

.edu-course-card__link:hover .edu-course-card__title {
    color: var(--edu-gold);
}

/* ==================== 教师卡片链接 ==================== */
.edu-teacher-card__link {
    display: block; color: inherit; text-decoration: none;
    text-align: center;
}

.edu-teacher-card__link:hover .edu-teacher-card__name {
    color: var(--edu-gold);
}

/* ==================== 媒体报导链接 ==================== */
.edu-media-item__title[href] {
    transition: color 0.2s;
}

.edu-media-item__title[href]:hover {
    color: var(--edu-gold);
}

/* ==================== 业务入口卡片（首页 Hero — 5卡片自适应布局） ==================== */
/* 桌面端：第一行3个(大+2小)，第二行2个 */
.edu-business-cards {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr;
    gap: 20px;
    margin-top: 48px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.edu-biz-card {
    display: block;
    padding: 24px 20px;
    border-radius: 10px;
    text-decoration: none;
    color: #fff;
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.08);
    transition: all 0.3s ease;
    text-align: left;
}

.edu-biz-card:hover {
    background: rgba(255,255,255,0.12);
    transform: translateY(-4px);
    border-color: var(--edu-gold);
    box-shadow: 0 4px 20px rgba(201,168,76,0.15);
}

.edu-biz-card--primary {
    border-color: var(--edu-gold);
    box-shadow: 0 0 30px rgba(201,168,76,0.08);
}
.edu-biz-card--primary:hover {
    box-shadow: var(--edu-gold-glow);
}

.edu-biz-card__icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.edu-biz-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #fff;
}

.edu-biz-card__desc {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.5;
}

/* 中等屏幕（768-1024px）：4+1 → 3+2 自适应 */
@media (max-width: 1024px) {
    .edu-business-cards {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        max-width: 700px;
    }
}

/* 平板端（≤768px）：2列 */
@media (max-width: 768px) {
    .edu-business-cards {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        max-width: 100%;
    }
    .edu-biz-card--primary {
        grid-column: span 2;
    }
    .edu-biz-card {
        padding: 20px 16px;
    }
    .edu-biz-card__title {
        font-size: 1.1rem;
    }
    .edu-biz-card__desc {
        font-size: 0.8rem;
    }
}

/* 手机端（≤480px）：单列 */
@media (max-width: 480px) {
    .edu-business-cards {
        grid-template-columns: 1fr;
    }
    .edu-biz-card--primary {
        grid-column: span 1;
        order: -1;
    }
}

/* ==================== 弹窗模态框（全局基础样式） ==================== */
/* 默认隐藏，通过 .edu-modal--open 类显示 */
.edu-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    pointer-events: none;
}

.edu-modal.edu-modal--open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.edu-modal__dialog {
    background: #fff;
    border-radius: 12px;
    width: 90%;
    max-width: 440px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    transform: translateY(20px);
    transition: transform 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.edu-modal--open .edu-modal__dialog {
    transform: translateY(0);
}

.edu-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 0;
}

.edu-modal__title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--edu-primary);
    margin: 0;
}

.edu-modal__close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: #999;
    transition: color 0.2s;
    line-height: 1;
}

.edu-modal__close:hover {
    color: #333;
}

.edu-modal__body {
    padding: 16px 24px 24px;
}

/* 弹窗表单 */
.edu-modal-form__fields {
    display: grid;
    gap: 14px;
}

.edu-modal-form__group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 4px;
    color: #333;
}

.edu-modal-form__group input,
.edu-modal-form__group select {
    display: block;
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 0.95rem;
    box-sizing: border-box;
    transition: border-color 0.2s;
}

.edu-modal-form__group input:focus,
.edu-modal-form__group select:focus {
    outline: none;
    border-color: var(--edu-cta);
    box-shadow: 0 0 0 3px rgba(0,102,255,0.08);
}

.edu-modal-form__submit {
    display: block;
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 6px;
    background: var(--edu-cta);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 8px;
    transition: all 0.2s;
}

.edu-modal-form__submit:hover {
    background: #0052cc;
}

.edu-modal-form__submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.edu-modal-form__message {
    margin-top: 10px;
    font-size: 0.85rem;
    min-height: 20px;
}

.edu-modal-form__message--error {
    color: #e74c3c;
}

.edu-modal-form__message--success {
    color: var(--edu-green);
}

.edu-modal-form__success {
    display: none;
    text-align: center;
    padding: 24px 0;
}

.edu-modal-form__success-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.edu-modal-form__success-text {
    font-size: 1rem;
    font-weight: 500;
    color: var(--edu-green);
}

/* 弹窗响应式 */
@media (max-width: 480px) {
    .edu-modal__dialog {
        width: 95%;
        margin: 0 8px;
    }
    .edu-modal__header {
        padding: 16px 16px 0;
    }
    .edu-modal__body {
        padding: 12px 16px 16px;
    }
}