/* ============================================
   Apple风格设计 - 全局重置与基础样式
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0071e3;
    --primary-dark: #0077ed;
    --accent-color: #0071e3;
    --text-dark: #1d1d1f;
    --text-light: #86868b;
    --text-muted: #6e6e73;
    /* 链接：比正文略浅一阶（站内统一） */
    --link-color: #424245;
    --link-hover: #0071e3;
    --bg-white: #ffffff;
    --bg-light: #f5f5f7;
    --bg-dark: #000000;
    --border-color: #d2d2d7;
    --border-light: #e5e5e7;
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    /* 科技感微光 */
    --tech-glow: rgba(0, 113, 227, 0.18);
    --tech-glow-strong: rgba(0, 113, 227, 0.28);
    /* 统一圆角与阴影 */
    --radius-card: 18px;
    --radius-btn: 980px;
    --radius-img: 18px;
    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 14px 44px rgba(0, 0, 0, 0.10);
    --shadow-btn: 0 4px 14px rgba(0, 113, 227, 0.4);
    --shadow-btn-strong: 0 6px 20px rgba(0, 113, 227, 0.5);
    /* 统一间距 */
    --space-section: 80px;
    --space-section-mobile: 60px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    /* 模块更清晰：整体浅灰底，卡片浮于其上 */
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.47059;
    overflow-x: hidden;
    font-weight: 400;
    /* 统一：页面内容正文 14px */
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.022em;
}

.container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 22px;
}

/* ============================================
   链接 - 站内统一（无下划线，颜色略浅）
   ============================================ */
a:not(.btn) {
    color: var(--link-color);
    text-decoration: none;
    transition: var(--transition);
}

a:not(.btn):hover {
    color: var(--link-hover);
    text-decoration: none;
}

a:not(.btn):active {
    opacity: 0.8;
}

.btn,
.btn:hover {
    text-decoration: none;
}

/* ============================================
   导航栏 - Apple风格
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(251, 251, 253, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
}

.navbar.scrolled {
    background-color: rgba(251, 251, 253, 0.95);
}

.nav-container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 44px;
}

.nav-logo a {
    /* 与菜单字号一致，仅加粗 */
    font-size: 12px;
    font-weight: 600;
    color: var(--text-dark);
    text-decoration: none;
    letter-spacing: -0.01em;
    transition: var(--transition);
}

.nav-logo a:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
}

.nav-menu li a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 400;
    font-size: 12px;
    transition: var(--transition);
    position: relative;
    padding: 0 10px;
    opacity: 0.88;
}

.nav-menu li a:hover {
    opacity: 1;
    color: var(--text-dark);
}

.nav-menu li a.active {
    opacity: 1;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 17px;
    height: 1px;
    background-color: var(--text-dark);
    transition: var(--transition);
}

/* ============================================
   英雄区域 - Apple风格
   ============================================ */
.hero {
    margin-top: 44px;
    background: var(--bg-white);
    color: var(--text-dark);
    padding: 76px 22px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(800px 420px at 50% 10%, var(--tech-glow), transparent 60%),
        radial-gradient(520px 280px at 18% 30%, rgba(0, 113, 227, 0.10), transparent 55%),
        linear-gradient(to bottom, rgba(0, 0, 0, 0.02), transparent 40%),
        repeating-linear-gradient(
            90deg,
            rgba(0, 0, 0, 0.03) 0px,
            rgba(0, 0, 0, 0.03) 1px,
            transparent 1px,
            transparent 140px
        ),
        repeating-linear-gradient(
            0deg,
            rgba(0, 0, 0, 0.03) 0px,
            rgba(0, 0, 0, 0.03) 1px,
            transparent 1px,
            transparent 140px
        );
    opacity: 0.55;
    pointer-events: none;
    transform: translateZ(0);
    animation: heroGlow 12s ease-in-out infinite;
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(1200px 600px at 50% 0%, rgba(0, 0, 0, 0.03), transparent 60%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 980px;
    margin: 0 auto;
    padding-bottom: 60px;
}

.hero-title {
    font-size: 56px;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: -0.005em;
    line-height: 1.07143;
    color: var(--text-dark);
}

.hero-subtitle {
    font-size: 28px;
    font-weight: 400;
    margin-bottom: 19px;
    color: var(--text-dark);
    letter-spacing: 0.007em;
    line-height: 1.10722;
}

.hero-desc {
    font-size: 21px;
    margin-bottom: 40px;
    color: var(--text-light);
    font-weight: 400;
    line-height: 1.381;
    letter-spacing: 0.011em;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    max-width: 980px;
    margin: 60px auto 0;
    position: relative;
    z-index: 1;
    border-top: 0.5px solid rgba(0, 0, 0, 0.1);
}

.stat-item {
    padding: 40px 20px;
    text-align: center;
    border-right: 0.5px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.stat-item:last-child {
    border-right: none;
}

.stat-item:hover {
    background-color: var(--bg-light);
}

.stat-number {
    font-size: 48px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-dark);
    letter-spacing: -0.003em;
    line-height: 1.08349;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    letter-spacing: -0.016em;
    font-weight: 400;
    line-height: 1.42859;
}

/* ============================================
   按钮 - Apple风格
   ============================================ */
/* ============================================
   按钮统一：黑色边框，hover 黑底白字
   ============================================ */
.btn {
    display: inline-block;
    padding: 12px 22px;
    border-radius: var(--radius-btn);
    text-decoration: none;
    font-weight: 400;
    font-size: 14px;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--text-dark);
    letter-spacing: -0.022em;
    text-align: center;
    line-height: 1.17648;
    background: transparent;
    color: var(--text-dark);
}

.btn-primary {
    background: transparent;
    color: var(--text-dark);
    border: 1px solid var(--text-dark);
}

.btn-primary:hover {
    background-color: var(--text-dark);
    color: white;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background-color: var(--text-dark);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--text-dark);
    border: 1px solid var(--text-dark);
}

.btn-outline:hover {
    background-color: var(--text-dark);
    color: white;
}

.btn:hover {
    border-color: var(--text-dark);
}

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

/* 兜底：按钮hover文字强制白色（避免与背景同色） */
a.btn:hover,
button.btn:hover {
    color: white;
}

/* ============================================
   字体与颜色统一（跨页面兜底）
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-dark);
}

p {
    color: var(--text-light);
}

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

strong {
    color: var(--text-dark);
}

/* 防止某些页面内联样式导致链接出现下划线 */
.content-card a,
.feature-card a,
.employment-item a,
.course-card a,
.testimonial-card a,
.sitemap-item a,
.footer a {
    text-decoration: none;
}

.btn-large {
    padding: 14px 28px;
    font-size: 19px;
    line-height: 1.21053;
    letter-spacing: 0.012em;
}

/* ============================================
   通用区块样式
   ============================================ */
section {
    padding: var(--space-section) 22px;
}

.section-title {
    /* 首页大标题保持大气（不跟随内容 16px 规则） */
    font-size: 48px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: -0.003em;
    color: var(--text-dark);
    line-height: 1.08349;
}

/* ============================================
   核心优势模块 - Apple风格
   ============================================ */
.features {
    background-color: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    max-width: 980px;
    margin: 0 auto;
}

.feature-card {
    padding: 60px 30px;
    text-align: center;
    transition: var(--transition);
    border-right: 0.5px solid rgba(0, 0, 0, 0.1);
    background-color: var(--bg-white);
}

.feature-card:last-child {
    border-right: none;
}

.feature-card:hover {
    background-color: var(--bg-light);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 32px;
    transition: var(--transition);
}

.feature-card h3 {
    /* 标题统一 16px */
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: 0.009em;
    line-height: 1.16667;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.47059;
    font-size: 14px;
    letter-spacing: -0.022em;
}

/* ============================================
   课程模块 - Apple风格
   ============================================ */
.courses {
    background-color: var(--bg-light);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 980px;
    margin: 0 auto;
}

.course-card {
    background-color: var(--bg-white);
    padding: 40px;
    transition: var(--transition);
    position: relative;
    border-radius: 18px;
    overflow: hidden;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.course-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--bg-dark);
    color: white;
    font-size: 12px;
    font-weight: 400;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
    border-radius: 12px;
}

.course-badge.hot {
    background-color: #ff3b30;
    color: white;
}

.course-card h3 {
    /* 标题统一 16px */
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: 0.004em;
    line-height: 1.25;
}

.course-date {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 14px;
    letter-spacing: -0.022em;
}

.course-features {
    list-style: none;
    margin-bottom: 24px;
}

.course-features li {
    padding: 12px 0;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    letter-spacing: -0.022em;
    border-bottom: 0.5px solid var(--border-light);
}

.course-features li:last-child {
    border-bottom: none;
}

.course-features li i {
    color: var(--primary-color);
    font-size: 14px;
    width: 20px;
}

/* ============================================
   就业保障模块
   ============================================ */
.employment {
    background-color: var(--bg-white);
}

.employment-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    max-width: 980px;
    margin: 0 auto;
}

.employment-item {
    text-align: center;
    padding: 60px 30px;
    transition: var(--transition);
    border-right: 0.5px solid rgba(0, 0, 0, 0.1);
}

.employment-item:last-child {
    border-right: none;
}

.employment-item:hover {
    background-color: var(--bg-light);
}

.employment-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 32px;
    transition: var(--transition);
}

.employment-item h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: 0.009em;
    line-height: 1.16667;
}

.employment-item p {
    color: var(--text-light);
    line-height: 1.47059;
    font-size: 14px;
    letter-spacing: -0.022em;
}

/* ============================================
   学员见证模块
   ============================================ */
.testimonials {
    background-color: var(--bg-light);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 980px;
    margin: 0 auto;
}

.testimonial-card {
    background-color: var(--bg-white);
    padding: 40px;
    transition: var(--transition);
    border-radius: 18px;
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.testimonial-content {
    margin-bottom: 24px;
}

.testimonial-content p {
    font-size: 14px;
    line-height: 1.42105;
    color: var(--text-dark);
    font-style: normal;
    letter-spacing: 0.012em;
}

.testimonial-author {
    border-top: 0.5px solid var(--border-light);
    padding-top: 20px;
}

.testimonial-author strong {
    display: block;
    color: var(--text-dark);
    margin-bottom: 4px;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: -0.022em;
}

.testimonial-author span {
    color: var(--text-light);
    font-size: 14px;
    letter-spacing: -0.016em;
}

/* ============================================
   咨询入口（CTA）
   ============================================ */
.cta {
    background-color: var(--bg-dark);
    color: white;
    text-align: center;
}

.cta-content h2 {
    color: white;
    font-size: 48px;
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: -0.003em;
    line-height: 1.08349;
}

.cta-content > p {
    font-size: 21px;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 400;
    letter-spacing: 0.011em;
    line-height: 1.381;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px;
    text-align: left;
    max-width: 980px;
    margin-left: auto;
    margin-right: auto;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 30px;
    border: 0.5px solid rgba(255, 255, 255, 0.2);
    border-radius: 18px;
    transition: var(--transition);
}

.contact-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.contact-item i {
    font-size: 24px;
    margin-top: 4px;
    color: white;
    width: 32px;
    text-align: center;
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    margin-bottom: 8px;
    font-size: 19px;
    font-weight: 600;
    color: white;
    letter-spacing: 0.012em;
}

.contact-item p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    margin: 0;
    letter-spacing: -0.022em;
}

/* ============================================
   页脚样式 - Apple风格
   ============================================ */
.footer {
    background-color: var(--bg-light);
    color: var(--text-light);
    padding: 40px 22px 20px;
    border-top: 0.5px solid rgba(0, 0, 0, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 20px;
    max-width: 980px;
    margin-left: auto;
    margin-right: auto;
}

.footer-section h3 {
    color: var(--text-dark);
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: -0.01em;
    text-transform: none;
}

.footer-section h4 {
    color: var(--text-dark);
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: -0.01em;
    text-transform: none;
}

.footer-section p {
    line-height: 1.47059;
    font-size: 14px;
    color: var(--text-light);
    letter-spacing: -0.01em;
}

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

.footer-section ul li {
    margin-bottom: 9.6px;
}

.footer-section ul li a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
    letter-spacing: -0.01em;
    opacity: 0.8;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    opacity: 1;
    text-decoration: none;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 0.5px solid rgba(0, 0, 0, 0.1);
    color: var(--text-light);
    font-size: 14px;
    letter-spacing: -0.01em;
    max-width: 980px;
    margin: 0 auto;
}

/* ============================================
   返回顶部按钮
   ============================================ */
/* 最新开班按钮 */
.latest-class-btn {
    position: fixed;
    bottom: 96px;
    right: 22px;
    background-color: #ff3b30;
    color: var(--bg-white);
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: var(--transition);
    z-index: 999;
    border-radius: 22px;
    box-shadow: 0 4px 14px rgba(255, 59, 48, 0.4);
    font-weight: 400;
    white-space: nowrap;
    padding: 0 16px;
    min-width: 44px;
    height: 44px;
    letter-spacing: -0.016em;
}

.latest-class-btn:hover {
    background-color: #ff2d20;
    box-shadow: 0 6px 20px rgba(255, 59, 48, 0.5);
    transform: scale(1.05);
}

.latest-class-btn.show {
    display: flex;
}

/* 二维码模态框 */
.qrcode-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.qrcode-modal.show {
    display: flex;
}

.qrcode-modal-content {
    background-color: var(--bg-white);
    border-radius: 18px;
    padding: 40px;
    max-width: 400px;
    width: 90%;
    position: relative;
    animation: slideUp 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.qrcode-modal-header {
    text-align: center;
    margin-bottom: 24px;
}

.qrcode-modal-header h3 {
    font-size: 32px;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: 0.004em;
    line-height: 1.125;
}

.qrcode-modal-header p {
    color: var(--text-light);
    font-size: 14px;
    letter-spacing: -0.022em;
}

.qrcode-modal-body {
    text-align: center;
}

.qrcode-modal-body img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    border: 0.5px solid var(--border-light);
}

.qrcode-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 32px;
    height: 32px;
    border: none;
    background-color: transparent;
    color: var(--text-light);
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border-radius: 50%;
}

.qrcode-modal-close:hover {
    background-color: var(--bg-light);
    color: var(--text-dark);
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.back-to-top {
    position: fixed;
    bottom: 22px;
    right: 22px;
    width: 44px;
    height: 44px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: var(--transition);
    z-index: 999;
    border-radius: 22px;
    box-shadow: 0 4px 14px rgba(0, 113, 227, 0.4);
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 113, 227, 0.5);
}

.back-to-top.show {
    display: flex;
}

/* ============================================
   动画效果
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   页面特定样式
   ============================================ */
.page-header {
    margin-top: 44px;
    background-color: var(--bg-white);
    color: var(--text-dark);
    padding: 76px 22px 40px;
    text-align: center;
    border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
}

.page-header h1 {
    font-size: 56px;
    margin-bottom: 6px;
    font-weight: 600;
    letter-spacing: -0.005em;
    line-height: 1.07143;
}

.page-header p {
    font-size: 28px;
    color: var(--text-light);
    font-weight: 400;
    letter-spacing: 0.007em;
    line-height: 1.10722;
}

.page-content {
    padding: 60px 22px;
    max-width: 980px;
    margin: 0 auto;
    /* 使用 body 浅灰底承接模块层级 */
    background: transparent;
}

.content-card {
    background-color: var(--bg-white);
    padding: 60px 40px;
    margin-bottom: 24px;
    transition: var(--transition);
    border-radius: 18px;
    border: 0.5px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
}

.content-card:hover {
    box-shadow: 0 14px 44px rgba(0, 0, 0, 0.10);
    border-color: rgba(0, 113, 227, 0.22);
}

.content-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(420px 220px at 10% 0%, rgba(0, 113, 227, 0.10), transparent 55%);
    opacity: 0;
    transition: var(--transition);
}

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

.content-card h2 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: 0.002em;
    line-height: 1.1;
}

.content-card h3 {
    font-size: 16px;
    margin: 40px 0 12px;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: 0.007em;
    line-height: 1.10722;
}

.content-card p {
    margin-bottom: 20px;
    line-height: 1.47059;
    color: var(--text-light);
    font-size: 14px;
    letter-spacing: -0.022em;
}

.content-card ul {
    list-style: none;
    margin: 20px 0;
}

.content-card ul li {
    padding: 12px 0 12px 24px;
    position: relative;
    line-height: 1.47059;
    color: var(--text-light);
    border-bottom: 0.5px solid var(--border-light);
    font-size: 14px;
    letter-spacing: -0.022em;
}

.content-card ul li:last-child {
    border-bottom: none;
}

.content-card ul li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: normal;
    font-size: 20px;
}

/* 内容区链接更“内链化”：不抢眼但可感知 */
.content-card a,
.feature-card a,
.employment-item a,
.course-card a,
.testimonial-card a,
.sitemap-item a {
    color: var(--link-color);
    text-decoration: none;
}

.content-card a:hover,
.feature-card a:hover,
.employment-item a:hover,
.course-card a:hover,
.testimonial-card a:hover,
.sitemap-item a:hover {
    color: var(--link-hover);
    text-decoration: none;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 400;
    font-size: 14px;
    letter-spacing: -0.022em;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-white);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    color: var(--text-dark);
    border-radius: 12px;
    letter-spacing: -0.022em;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

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

.required {
    color: #ff3b30;
}

.course-detail {
    margin-top: 20px;
}

.course-info {
    background-color: var(--bg-light);
    padding: 30px;
    margin-bottom: 24px;
    border-radius: 18px;
}

.course-info p {
    margin-bottom: 12px;
    color: var(--text-dark);
    font-size: 14px;
    letter-spacing: -0.022em;
}

.course-info strong {
    color: var(--text-dark);
    font-weight: 600;
}

.comparison-table {
    overflow-x: auto;
    margin-top: 24px;
    border-radius: 18px;
    overflow: hidden;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-white);
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 0.5px solid var(--border-light);
}

.comparison-table th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--text-dark);
    font-size: 14px;
    letter-spacing: -0.022em;
}

.comparison-table tr:hover {
    background-color: var(--bg-light);
}

.comparison-table td {
    color: var(--text-light);
    font-size: 14px;
    letter-spacing: -0.022em;
}

.partners-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.partner-item {
    background-color: var(--bg-light);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    border-radius: 18px;
}

.partner-item:hover {
    background-color: var(--bg-white);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.partner-item i {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.partner-item strong {
    display: block;
    color: var(--text-dark);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: -0.022em;
}

.achievements {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-top: 24px;
    border-radius: 18px;
    overflow: hidden;
    border: 0.5px solid var(--border-light);
}

.achievement-item {
    text-align: center;
    padding: 40px 20px;
    background-color: var(--bg-white);
    border-right: 0.5px solid var(--border-light);
}

.achievement-item:last-child {
    border-right: none;
}

.achievement-number {
    font-size: 56px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-dark);
    letter-spacing: -0.005em;
    line-height: 1.07143;
}

.achievement-label {
    font-size: 14px;
    color: var(--text-light);
    letter-spacing: -0.022em;
    font-weight: 400;
    line-height: 1.47059;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 24px;
}

.contact-info-item {
    display: flex;
    gap: 20px;
    padding: 30px;
    background-color: var(--bg-light);
    border-radius: 18px;
    transition: var(--transition);
}

.contact-info-item:hover {
    background-color: var(--bg-white);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.contact-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 24px;
    flex-shrink: 0;
    transition: var(--transition);
}

.contact-details h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: 0.009em;
    line-height: 1.16667;
}

.contact-details p {
    margin-bottom: 8px;
    color: var(--text-light);
    font-size: 14px;
    letter-spacing: -0.022em;
}

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

.contact-details a:hover {
    text-decoration: none;
}

.contact-form {
    margin-top: 24px;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1068px) {
    .features-grid,
    .employment-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-card:nth-child(2n),
    .employment-item:nth-child(2n) {
        border-right: none;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 44px;
        flex-direction: column;
        background-color: rgba(251, 251, 253, 0.95);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        width: 100%;
        text-align: left;
        transition: var(--transition);
        border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
        padding: 20px 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        padding: 12px 22px;
    }
    
    .nav-menu li a {
        font-size: 14px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero {
        padding: 56px 22px 0;
    }

    .hero-title {
        font-size: 40px;
        line-height: 1.1;
    }

    .hero-subtitle {
        font-size: 24px;
        line-height: 1.16667;
    }

    .hero-desc {
        font-size: 19px;
        line-height: 1.21053;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        border-top: 0.5px solid rgba(0, 0, 0, 0.1);
    }
    
    .stat-item:nth-child(2n) {
        border-right: none;
    }
    
    .stat-item {
        border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
    }
    
    .stat-item:nth-child(3),
    .stat-item:nth-child(4) {
        border-bottom: none;
    }

    .stat-number {
        font-size: 40px;
    }

    .section-title {
        font-size: 40px;
        line-height: 1.1;
    }

    .features-grid,
    .employment-content {
        grid-template-columns: 1fr;
    }
    
    .feature-card,
    .employment-item {
        border-right: none;
        border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
    }
    
    .feature-card:last-child,
    .employment-item:last-child {
        border-bottom: none;
    }

    .courses-grid,
    .testimonials-slider {
        grid-template-columns: 1fr;
    }

    .contact-info,
    .contact-info-grid {
        grid-template-columns: 1fr;
    }

    section {
        padding: 60px 22px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .page-header {
        padding: 56px 22px 30px;
    }
    
    .page-header h1 {
        font-size: 40px;
        line-height: 1.1;
    }

    .page-header p {
        font-size: 24px;
        line-height: 1.16667;
    }

    .page-content {
        padding: 40px 22px;
        border-radius: 18px;
    }

    .content-card {
        padding: 40px 30px;
    }

    .content-card h2 {
        font-size: 32px;
        line-height: 1.125;
    }

    .content-card h3 {
        font-size: 24px;
        line-height: 1.16667;
    }

    .comparison-table {
        font-size: 14px;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 12px 16px;
    }

    .partners-list,
    .achievements {
        grid-template-columns: 1fr;
    }
    
    .achievement-item {
        border-right: none;
        border-bottom: 0.5px solid var(--border-light);
    }
    
    .achievement-item:last-child {
        border-bottom: none;
    }

    .achievement-number {
        font-size: 48px;
    }
    
    .latest-class-btn,
    .back-to-top {
        right: 16px;
    }
    
    .latest-class-btn {
        bottom: 88px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 40px 22px 0;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 21px;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        border-right: none;
        border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
    }
    
    .stat-item:last-child {
        border-bottom: none;
    }

    .section-title {
        font-size: 32px;
    }

    .cta-content h2 {
        font-size: 32px;
    }
}

/* ============================================
   网站地图样式
   ============================================ */
.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.sitemap-item {
    background-color: var(--bg-white);
    border: 0.5px solid var(--border-light);
    border-radius: 18px;
    padding: 30px;
    transition: var(--transition);
}

.sitemap-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 8px 24px rgba(0, 113, 227, 0.12);
    transform: translateY(-4px);
}

.sitemap-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 600;
    /* 标题统一 16px */
    font-size: 16px;
    margin-bottom: 8px;
    transition: var(--transition);
    letter-spacing: 0.012em;
}

.sitemap-item a:hover {
    color: var(--primary-color);
}

.sitemap-item a i {
    color: var(--primary-color);
    font-size: 20px;
    width: 24px;
    text-align: center;
}

.sitemap-item p {
    color: var(--text-light);
    font-size: 14px;
    margin: 0;
    line-height: 1.47059;
    letter-spacing: -0.022em;
}

.content-card h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.content-card h2 i {
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .sitemap-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .sitemap-item {
        padding: 24px;
    }
}

/* ============================================
   Keyframes
   ============================================ */
@keyframes heroGlow {
    0% {
        opacity: 0.45;
        filter: saturate(110%);
    }
    50% {
        opacity: 0.70;
        filter: saturate(135%);
    }
    100% {
        opacity: 0.45;
        filter: saturate(110%);
    }
}