/* =====================================================
   PLC工控在线学院 - UI Design System
   Tech Blue / Industrial Dark 风格
   不破坏任何 .plck-* 插件样式
   ===================================================== */

/* ---------- CSS Variables ---------- */
:root {
    --plc-primary: #0a5c8a;
    --plc-primary-dark: #083d5e;
    --plc-primary-light: #1a7db8;
    --plc-accent: #00b4d8;
    --plc-accent-glow: #48cae4;
    --plc-dark-bg: #0d1b2a;
    --plc-dark-alt: #1b2d45;
    --plc-dark-card: #1e3348;
    --plc-surface: #f0f4f8;
    --plc-surface-alt: #e2e8f0;
    --plc-text: #1e293b;
    --plc-text-muted: #64748b;
    --plc-text-light: #f8fafc;
    --plc-success: #16a34a;
    --plc-warning: #f59e0b;
    --plc-error: #dc2626;
    --plc-radius: 12px;
    --plc-radius-sm: 8px;
    --plc-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --plc-shadow-lg: 0 10px 25px rgba(0,0,0,0.12), 0 4px 10px rgba(0,0,0,0.08);
    --plc-shadow-glow: 0 0 20px rgba(0,180,216,0.15);
    --plc-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Base ---------- */
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--plc-text);
    background: var(--plc-surface);
    line-height: 1.7;
}

/* ---------- Header / Navigation ---------- */
.plc-nav-wrapper {
    background: var(--plc-dark-bg);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.plc-nav-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.plc-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--plc-text-light);
    text-decoration: none;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.plc-brand:hover {
    color: var(--plc-accent);
}

.plc-logo-img {
    height: 36px;
    width: auto;
    display: block;
    max-width: 220px;
    vertical-align: middle;
}

.plc-nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.plc-nav-link {
    color: rgba(255,255,255,0.75);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 8px;
    transition: all var(--plc-transition);
    white-space: nowrap;
}

.plc-nav-link:hover {
    color: #fff;
    background: rgba(255,255,255,0.08);
}

.plc-nav-link.active {
    color: var(--plc-accent);
    background: rgba(0,180,216,0.1);
}

.plc-nav-register {
    background: var(--plc-accent);
    color: var(--plc-dark-bg) !important;
    font-weight: 600;
}

.plc-nav-register:hover {
    background: var(--plc-accent-glow);
    color: var(--plc-dark-bg) !important;
}

.plc-nav-logout {
    opacity: 0.6;
    font-size: 13px;
}

.plc-nav-logout:hover {
    opacity: 1;
}

/* Mobile Toggle */
.plc-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.plc-mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.3s;
}

/* ---------- Hero Section ---------- */
.plc-hero {
    position: relative;
    overflow: hidden;
    padding: 26px 20px 30px;
    text-align: center;
    background: linear-gradient(135deg, var(--plc-dark-bg) 0%, var(--plc-dark-alt) 50%, #0f2940 100%);
}

.plc-hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0,180,216,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(10,92,138,0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 0%, rgba(0,180,216,0.05) 0%, transparent 40%);
    pointer-events: none;
}

.plc-hero-content {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.plc-hero-title {
    font-size: clamp(1.35rem, 2.6vw, 1.9rem);
    font-weight: 900;
    color: var(--plc-text-light);
    line-height: 1.25;
    margin: 0 0 8px;
    letter-spacing: -0.5px;
}

.plc-hero-subtitle {
    font-size: clamp(0.92rem, 1.5vw, 1.05rem);
    color: rgba(255,255,255,0.68);
    line-height: 1.6;
    margin: 0 0 16px;
}

.plc-hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.plc-hero-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 8px 22px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--plc-transition);
    cursor: pointer;
}

.plc-hero-btn-primary {
    background: var(--plc-accent);
    color: var(--plc-dark-bg);
    box-shadow: var(--plc-shadow-glow);
}

.plc-hero-btn-primary:hover {
    background: var(--plc-accent-glow);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0,180,216,0.25);
}

.plc-hero-btn-secondary {
    background: rgba(255,255,255,0.1);
    color: var(--plc-text-light);
    border: 1px solid rgba(255,255,255,0.2);
}

.plc-hero-btn-secondary:hover {
    background: rgba(255,255,255,0.18);
    transform: translateY(-2px);
}

.plc-hero-btn-ghost {
    background: rgba(255,255,255,0.05);
    color: var(--plc-text-light);
    border: 1px dashed rgba(255,255,255,0.35);
}
.plc-hero-btn-ghost:hover {
    background: rgba(255,255,255,0.14);
    transform: translateY(-2px);
}

/* ---------- 首页课程卡片区头部：标题 + 所有课程按钮 ---------- */
.plc-courses-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin: 24px 0 4px;
}
.plc-courses-head h2 {
    margin: 0;
    font-size: 20px;
    font-weight: 800;
    color: #0d2b4e;
}
.plc-all-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-height: 40px;
    padding: 8px 18px;
    border-radius: 8px;
    border: 1px solid #1565c0;
    background: #fff;
    color: #1565c0;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
}
.plc-all-btn:hover {
    background: #1565c0;
    color: #fff;
}

/* ---------- 尊重系统减弱动效设置 ---------- */
@media (prefers-reduced-motion: reduce) {
    .plc-hero-btn,
    .plc-hero-btn-primary,
    .plc-hero-btn-secondary,
    .plc-trust-card,
    .plck-course-card {
        transition: none !important;
        transform: none !important;
    }
}

/* ---------- Trust / Selling Points ---------- */
.plc-trust {
    padding: 64px 24px;
    background: #fff;
}

.plc-trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.plc-trust-card {
    text-align: center;
    padding: 32px 20px;
    border-radius: var(--plc-radius);
    background: var(--plc-surface);
    transition: all var(--plc-transition);
}

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

.plc-trust-icon {
    font-size: 40px;
    margin-bottom: 16px;
    line-height: 1;
}

.plc-trust-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--plc-primary-dark);
    margin: 0 0 8px;
}

.plc-trust-card p {
    font-size: 14px;
    color: var(--plc-text-muted);
    line-height: 1.6;
    margin: 0;
}

/* ---------- Course Series Section (overrides for .plck-* from plugin) ---------- */
.plck-series-title {
    font-size: 24px !important;
    font-weight: 700 !important;
    color: var(--plc-primary-dark) !important;
    border-bottom: 2px solid var(--plc-primary) !important;
    padding-bottom: 10px !important;
    margin: 48px auto 24px !important;
    max-width: 1200px !important;
    padding-left: 24px !important;
    padding-right: 24px !important;
}

.plck-grid {
    max-width: 1200px !important;
    margin: 0 auto 32px !important;
    padding: 0 24px !important;
    gap: 20px !important;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)) !important;
}

.plck-card {
    border: 1px solid #e2e8f0 !important;
    border-radius: var(--plc-radius) !important;
    padding: 24px !important;
    background: #fff !important;
    box-shadow: var(--plc-shadow) !important;
    transition: all var(--plc-transition) !important;
    position: relative;
    overflow: hidden;
}

.plck-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--plc-primary), var(--plc-accent));
    opacity: 0;
    transition: opacity var(--plc-transition);
}

.plck-card:hover {
    transform: translateY(-4px) !important;
    box-shadow: var(--plc-shadow-lg) !important;
}

.plck-card:hover::before {
    opacity: 1;
}

.plck-card h3 {
    font-size: 17px !important;
    font-weight: 700 !important;
    color: var(--plc-primary-dark) !important;
    margin: 0 0 8px !important;
    line-height: 1.4 !important;
}

.plck-card p {
    font-size: 14px !important;
    color: var(--plc-text-muted) !important;
    line-height: 1.6 !important;
    margin: 0 0 14px !important;
}

.plck-badge {
    font-size: 12px !important;
    padding: 4px 12px !important;
    border-radius: 20px !important;
    background: var(--plc-surface-alt) !important;
    color: var(--plc-text-muted) !important;
}

.plck-badge-open {
    background: #dcfce7 !important;
    color: #166534 !important;
}

/* ---------- Course Page ---------- */
.plc-course-header {
    max-width: 860px;
    margin: 0 auto 32px;
    padding: 0 24px;
}

.plc-course-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.plc-course-series-badge {
    display: inline-block;
    background: var(--plc-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 20px;
    letter-spacing: 0.5px;
}

.plc-course-unlocked-badge {
    display: inline-block;
    background: #dcfce7;
    color: #166534;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 20px;
}

.plc-course-locked-badge {
    display: inline-block;
    background: #fef3c7;
    color: #92400e;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 20px;
}

.plc-course-title {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--plc-primary-dark);
    line-height: 1.25;
    margin: 0 0 12px;
}

.plc-course-excerpt {
    font-size: 16px;
    color: var(--plc-text-muted);
    line-height: 1.7;
    margin: 0;
}

/* ---------- Footer ---------- */
.plc-footer {
    background: var(--plc-dark-bg);
    color: rgba(255,255,255,0.7);
    margin-top: 60px;
}

.plc-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px 32px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
    flex-wrap: wrap;
}

.plc-footer-brand h3 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 8px;
}

.plc-footer-brand p {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    margin: 0;
    max-width: 300px;
    line-height: 1.6;
}

.plc-footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.plc-footer-links a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--plc-transition);
}

.plc-footer-links a:hover {
    color: var(--plc-accent);
}

.plc-footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 20px 24px;
    text-align: center;
}

.plc-footer-bottom p {
    font-size: 13px;
    color: rgba(255,255,255,0.35);
    margin: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .plc-nav-inner {
        height: 56px;
        padding: 0 16px;
    }

    .plc-mobile-toggle {
        display: flex;
    }

    .plc-nav-links {
        display: none;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: var(--plc-dark-bg);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
        box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    }

    .plc-nav-open .plc-nav-links {
        display: flex;
    }

    .plc-nav-link {
        width: 100%;
        padding: 12px 16px;
    }

    .plc-hero {
        padding: 22px 14px 26px;
    }

    .plc-hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .plc-hero-btn {
        width: 100%;
        max-width: 280px;
    }

    .plc-trust {
        padding: 48px 16px;
    }

    .plc-trust-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .plc-trust-card {
        padding: 24px 16px;
    }

    .plc-footer-inner {
        flex-direction: column;
        text-align: center;
        align-items: center;
        padding: 32px 16px 24px;
    }

    .plc-footer-brand p {
        max-width: 100%;
    }

    .plc-footer-links {
        justify-content: center;
    }

    .plck-grid {
        grid-template-columns: 1fr !important;
        padding: 0 16px !important;
    }

    .plck-series-title {
        padding-left: 16px !important;
        padding-right: 16px !important;
    }
}

@media (max-width: 480px) {
    .plc-trust-grid {
        grid-template-columns: 1fr;
    }

    .plc-hero-title {
        font-size: 1.3rem;
    }

    .plc-courses-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .plc-all-btn {
        width: 100%;
    }
}

/* ---------- Page title (non-homepage pages) ---------- */
.plc-page-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--plc-primary-dark);
    margin: 0 0 8px !important;
    text-align: center;
}

.wp-block-post-content {
    max-width: 860px;
    margin: 0 auto;
}

/* ---------- Redeem / form pages polish ---------- */
.plck-redeem-form h3 {
    color: var(--plc-primary-dark);
    margin-top: 0;
}

.plck-redeem-form button[type=submit] {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    font-weight: 600;
    margin-top: 8px;
}

.plck-lockbox {
    max-width: 560px;
}

/* Course content typography */
.single-course .wp-block-post-content p,
.wp-block-post-content p {
    line-height: 1.9;
}

.wp-block-post-content li {
    line-height: 1.9;
    margin: 4px 0;
}

/* ---------- Animation ---------- */
@keyframes plcFadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.plc-hero-content {
    animation: plcFadeUp 0.6s ease-out;
}

.plc-trust-card {
    animation: plcFadeUp 0.5s ease-out forwards;
    opacity: 0;
}

.plc-trust-card:nth-child(1) { animation-delay: 0.1s; }
.plc-trust-card:nth-child(2) { animation-delay: 0.2s; }
.plc-trust-card:nth-child(3) { animation-delay: 0.3s; }
.plc-trust-card:nth-child(4) { animation-delay: 0.4s; }

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .plc-hero-content,
    .plc-trust-card,
    .plck-card {
        animation: none !important;
        transition: none !important;
    }

    .plc-hero-btn:hover,
    .plc-trust-card:hover,
    .plck-card:hover {
        transform: none !important;
    }
}

/* ---------- Typography overrides for the default theme ---------- */
.page .wp-block-post-title,
.single .wp-block-post-title {
    display: none;
}

/* Hide unwanted WordPress elements */
.widget-area,
.widget,
.comments-area,
.comment-respond,
.wp-block-post-navigation-link,
.wp-block-template-part .wp-block-navigation .wp-block-navigation-link:has(.wp-block-navigation-item__label:contains("博客")),
.wp-block-template-part .wp-block-navigation .wp-block-navigation-link:has(.wp-block-navigation-item__label:contains("关于")),
.wp-block-template-part .wp-block-navigation .wp-block-navigation-link:has(.wp-block-navigation-item__label:contains("常见问题")),
.wp-block-template-part .wp-block-navigation .wp-block-navigation-link:has(.wp-block-navigation-item__label:contains("作者")),
.wp-block-template-part .wp-block-navigation .wp-block-navigation-link:has(.wp-block-navigation-item__label:contains("事件")),
.wp-block-template-part .wp-block-navigation .wp-block-navigation-link:has(.wp-block-navigation-item__label:contains("商店")),
.wp-block-template-part .wp-block-navigation .wp-block-navigation-link:has(.wp-block-navigation-item__label:contains("样板")),
.wp-block-template-part .wp-block-navigation .wp-block-navigation-link:has(.wp-block-navigation-item__label:contains("主题")) {
    display: none !important;
}

/* Hide the default footer pattern links */
.wp-block-template-part .wp-block-navigation .wp-block-navigation__container .wp-block-navigation-item .wp-block-navigation-item__label {
    /* already hidden via parent selectors */
}

/* Fix spacing on page templates */
.wp-site-blocks main {
    padding-top: 0 !important;
    margin-top: 0 !important;
}

/* Course page: video container */
.plc-video {
    margin: 24px auto !important;
    border-radius: var(--plc-radius) !important;
    overflow: hidden;
    box-shadow: var(--plc-shadow) !important;
}

/* Course page: lockbox */
.plck-lockbox {
    border-radius: var(--plc-radius) !important;
    background: #fffbe8 !important;
    border: 1px solid #fde68a !important;
    padding: 24px !important;
}

.plck-lockbox h4 {
    font-size: 16px !important;
    font-weight: 700 !important;
}

/* Course page: trial section */
.plck-trial {
    border-radius: var(--plc-radius) !important;
    border-left: 4px solid var(--plc-primary) !important;
    background: #f8fafc !important;
    padding: 20px !important;
}

/* Redeem form */
.plck-redeem-form {
    border-radius: var(--plc-radius) !important;
    border: 1px solid #e2e8f0 !important;
    box-shadow: var(--plc-shadow) !important;
}

/* Logo SVG icon */
.plc-logo-icon {
    width: 28px;
    height: 28px;
    margin-right: 8px;
    vertical-align: middle;
}

/* ---------- Login / Register 表单居中 ---------- */
#plck-login-form,
.plck-redeem-form {
    max-width: 440px;
    margin: 24px auto;
}

#plck-login-form {
    background: #fafbfc;
    border: 1px solid #e3e6ea;
    border-radius: 10px;
    padding: 22px 26px;
}

#plck-login-form p {
    margin: 10px 0;
}

#plck-login-form label {
    display: block;
    margin: 10px 0 4px;
    font-weight: 600;
    color: var(--plc-primary-dark);
}

#plck-login-form input[type=text],
#plck-login-form input[type=password] {
    width: 100%;
    box-sizing: border-box;
    padding: 11px 12px;
    border: 1px solid #ccd0d4;
    border-radius: 6px;
    font-size: 15px;
}

#plck-login-form input[type=text]:focus,
#plck-login-form input[type=password]:focus {
    border-color: var(--plc-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}

#plck-login-form .login-remember {
    text-align: left;
    font-weight: 400;
}

#plck-login-form .login-submit,
.plck-redeem-form button[type=submit] {
    text-align: center;
}

#plck-login-form .login-submit input[type=submit] {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
}

/* 登录/注册页下的辅助链接居中对齐 */
.page-id-13 .plck-muted,
.page-id-14 .plck-muted {
    text-align: center;
    margin-top: 14px;
}

/* ---------- 老师操作台入口（仅管理员） ---------- */
.plc-nav-teacher {
    background: linear-gradient(135deg, #1e40af, #2563eb);
    color: #fff !important;
    border-radius: 8px;
    padding: 7px 13px !important;
    font-weight: 700;
}

.plc-hero-btn-admin {
    background: linear-gradient(135deg, #1e40af, #2563eb);
    color: #fff;
    border-color: #1e40af;
    box-shadow: 0 6px 18px rgba(30, 64, 175, .35);
}

/* ---------- 课程页章节列表 ---------- */
.plck-lessons-block {
    margin-top: 26px;
    padding-top: 4px;
}

.plck-lessons-title {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 14px;
    color: var(--plc-primary-dark);
}

.plck-lessons-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.plck-lesson-item {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 14px 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    box-shadow: 0 1px 3px rgba(15, 23, 42, .05);
}

.plck-lesson-item.plck-lesson-locked {
    background: #f8fafc;
    color: #64748b;
}

.plck-lesson-idx {
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--plc-primary);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
}

.plck-lesson-locked .plck-lesson-idx {
    background: #cbd5e1;
}

.plck-lesson-name {
    font-weight: 600;
    font-size: 15px;
    padding-top: 3px;
}

.plck-lesson-video-wrap {
    flex-basis: 100%;
    margin-top: 4px;
}

.plck-lesson-video video {
    width: 100%;
    border-radius: 10px;
}
/* ===== 全站自适应兜底：内容不出界、媒体自适应 ===== */
.wp-site-blocks main {
    overflow-x: clip;
}
img, video, iframe {
    max-width: 100%;
    height: auto;
}
.wp-site-blocks table {
    max-width: 100%;
}

/* 章节链接式：整行可点击 */
.plck-lesson-link {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}
.plck-lesson-link:hover .plck-lesson-name {
    color: var(--plc-primary);
}
.plck-lesson-link.plck-lesson-on {
    border-color: var(--plc-primary);
    background: #eff6ff;
    box-shadow: 0 0 0 1px var(--plc-primary);
}
.plck-lesson-link.plck-lesson-on .plck-lesson-idx {
    background: var(--plc-accent);
}
/* 章节播放区（点击后展开） */
.plck-lesson-player {
    margin-top: 14px;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    background: #0f172a;
    padding: 12px;
}
.plck-lesson-player-bar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 8px;
}
.plck-lesson-close {
    background: rgba(255,255,255,.1);
    color: #fff;
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 8px;
    padding: 6px 14px;
    font-size: 13px;
    cursor: pointer;
    min-height: 36px;
}
.plck-lesson-close:hover {
    background: rgba(255,255,255,.2);
}

/* ===== 移动端底部固定导航（全局） ===== */
.plc-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    background: #fff;
    border-top: 1px solid #e2e8f0;
    box-shadow: 0 -2px 10px rgba(15, 23, 42, .08);
    padding: 4px 6px calc(4px + env(safe-area-inset-bottom));
}
.plc-bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    text-decoration: none;
    color: #64748b;
    font-size: 12px;
    font-weight: 500;
    padding: 4px 0;
    border-radius: 10px;
    min-height: 50px;
}
.plc-bottom-nav-ic {
    font-size: 21px;
    line-height: 1;
}
.plc-bottom-nav-item.on {
    color: var(--plc-primary, #1565c0);
    font-weight: 700;
}
@media (max-width: 768px) {
    .plc-bottom-nav {
        display: flex !important;
    }
    body {
        padding-bottom: calc(64px + env(safe-area-inset-bottom));
    }
    /* 顶部导航移动端放大：字更大、点击区更高 */
    .plc-brand {
        font-size: 19px;
    }
    .plc-logo-img {
        height: 30px;
        max-width: 170px;
    }
    .plc-nav-links {
        gap: 2px;
    }
    .plc-nav-link {
        font-size: 15px;
        padding: 14px 18px;
    }
    .plc-nav-logout {
        font-size: 14px;
    }
    .plc-mobile-toggle {
        padding: 10px;
    }
    .plc-mobile-toggle span {
        width: 26px;
        height: 3px;
    }
}

/* ===== 居中兜底：主内容强制 1100 居中；Hero 全宽背景 ===== */
.wp-site-blocks main .entry-content > :where(:not(.alignfull)) {
    max-width: 1100px !important;
    margin-left: auto !important;
    margin-right: auto !important;
}
.plc-hero.alignfull {
    width: 100vw;
    max-width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
}

/* ===== 移动端兜底：防横向滚动 / 字号自动调整破坏布局 ===== */
html, body {
    overflow-x: hidden;
}
html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}