/* ============================================
   全局样式 - Apple风格设计
   ============================================ */

:root {
    /* 主色调 - 蓝色系 */
    --primary-blue: #0071e3;
    --primary-blue-dark: #0051a5;
    --primary-blue-light: #0077ed;
    --blue-gradient: linear-gradient(135deg, #0d46df 0%, #3087ff 100%);
    
    /* 辅助色 - 红色系 */
    --accent-red: #ff3b30;
    --accent-red-light: #ff6b6b;
    
    /* 中性色 */
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --bg-white: #ffffff;
    --bg-light: #f5f5f7;
    --bg-dark: #000000;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    
    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   导航栏
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-blue);
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: var(--transition);
}

.nav-logo a:hover {
    color: var(--primary-blue-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 400;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-blue);
}

.nav-link:hover::after {
    width: 100%;
}

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

.bar {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */

.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--blue-gradient);
    z-index: -1;
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 59, 48, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 700;
    color: var(--bg-white);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -2px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-md);
    letter-spacing: 1px;
}

.hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   按钮样式
   ============================================ */

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font-family);
}

.btn-primary {
    background: var(--bg-white);
    color: var(--primary-blue);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.95);
}

.btn-secondary {
    background: transparent;
    color: var(--bg-white);
    border: 2px solid rgba(255, 255, 255, 0.8);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--bg-white);
    transform: translateY(-2px);
}

/* ============================================
   通用Section样式
   ============================================ */

.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ============================================
   关于我们
   ============================================ */

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-intro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: 0 var(--spacing-md);
}

.about-intro p {
    font-size: 1.25rem;
    color: var(--text-primary);
    line-height: 1.9;
    max-width: 900px;
    margin: 0 auto;
}

.about-intro strong {
    color: var(--primary-blue);
    font-weight: 600;
}

.cultivate-principles {
    margin-top: var(--spacing-xl);
}

.principles-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.5px;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.principle-card {
    background: var(--bg-white);
    padding: 1.5rem;
    border-radius: 14px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-top: 3px solid var(--primary-blue);
    display: flex;
    flex-direction: column;
}

.principle-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-top-color: var(--primary-blue-dark);
}

.principle-card:hover .principle-name {
    color: var(--primary-blue-dark);
}

.principle-header {
    margin-bottom: var(--spacing-sm);
}

.principle-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-blue);
    margin: 0;
    line-height: 1.4;
}

.principle-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
    flex-grow: 1;
}

.principles-summary {
    margin-top: var(--spacing-lg);
}

.principles-summary p {
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 2;
    margin: 0;
    text-align: center;
    background: linear-gradient(135deg, #0d46df, #ff5f6d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ============================================
   照片墙
   ============================================ */

.photo-wall {
    background: var(--bg-light);
}

.photo-wall-marquee {
    position: relative;
    overflow-x: auto;
    overflow-y: hidden;
    border-radius: 28px;
    background: var(--bg-white);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0, 113, 227, 0.08);
    scrollbar-width: none;
    -ms-overflow-style: none;
    cursor: grab;
}

.photo-wall-marquee::-webkit-scrollbar {
    display: none;
}

.photo-wall-marquee.dragging {
    cursor: grabbing;
}

.photo-wall-marquee::before,
.photo-wall-marquee::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 120px;
    z-index: 2;
    pointer-events: none;
}

.photo-wall-marquee::before {
    left: 0;
    background: linear-gradient(90deg, var(--bg-white), rgba(255, 255, 255, 0));
}

.photo-wall-marquee::after {
    right: 0;
    background: linear-gradient(270deg, var(--bg-white), rgba(255, 255, 255, 0));
}

.photo-wall-track {
    display: flex;
    gap: var(--spacing-md);
    animation: photoWallScroll 28s linear infinite;
    will-change: transform;
}

.photo-wall-track:hover {
    animation-play-state: paused;
}

.photo-wall-marquee.dragging .photo-wall-track {
    animation-play-state: paused;
}

.photo-card {
    flex: 0 0 auto;
    width: clamp(240px, 32vw, 420px);
    aspect-ratio: 16 / 9;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: var(--bg-light);
}

.photo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

@keyframes photoWallScroll {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(-50%);
    }
}

/* ============================================
   选择项目
   ============================================ */

.projects-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.projects-cards-inline {
    grid-template-columns: repeat(3, minmax(300px, 1fr));
}

.projects-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    border: 1px solid rgba(0, 113, 227, 0.08);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
    align-items: flex-start;
    text-align: left;
}

.projects-card-head {
    display: flex;
    margin-bottom: var(--spacing-sm);
    position: relative;
    width: 100%;
}

.projects-step {
    position: absolute;
    top: -20px;
    right: -10px;
    font-size: 6rem;
    font-weight: 800;
    color: var(--primary-blue);
    opacity: 0.06;
    line-height: 1;
    pointer-events: none;
    z-index: 0;
}

.projects-card:nth-child(2) .projects-step {
    color: #ff6f61;
}

.projects-card:nth-child(3) .projects-step {
    color: #6a5cff;
}

.projects-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 20px;
    background: rgba(0, 113, 227, 0.08);
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    z-index: 1;
}

.projects-icon svg {
    width: 32px;
    height: 32px;
}

.projects-card:nth-child(2) .projects-icon {
    background: rgba(255, 111, 97, 0.08);
    color: #ff6f61;
}

.projects-card:nth-child(3) .projects-icon {
    background: rgba(106, 92, 255, 0.08);
    color: #6a5cff;
}

.projects-card h4 {
    font-size: 1.4rem;
    margin: 0.5rem 0 0;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.projects-card p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

.projects-card ul {
    list-style: none;
    padding: 1.25rem;
    margin: 1rem 0 0;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    background: var(--bg-light);
    border-radius: 16px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.projects-card ul li {
    padding-left: 1.4rem;
    position: relative;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.projects-card ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-size: 1.2em;
    line-height: 1.4;
}

.projects-card:nth-child(2) ul li::before {
    color: #ff6f61;
}

.projects-card:nth-child(3) ul li::before {
    color: #6a5cff;
}

.projects-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(0, 113, 227, 0.2);
}

.projects-card:hover h4 {
    color: var(--primary-blue);
}

/* ============================================
   项目组设置与培养方向
   ============================================ */

.program-tabs-wrapper {
    max-width: 900px;
    margin: 0 auto var(--spacing-lg);
}

.program-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
    position: relative;
    z-index: 100;
}

.program-tab {
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 18px;
    padding: 1.5rem;
    text-align: center;
    background: var(--bg-white);
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    position: relative;
    z-index: 101;
    pointer-events: auto;
    min-width: 48px;
    min-height: 48px;
}

.program-tab * {
    cursor: pointer;
    pointer-events: none; /* 让点击穿透到 button */
}

.program-tab span {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.program-tab small {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.program-tab.active {
    color: var(--bg-white);
    border-color: transparent;
    transform: translateY(-6px);
}

.program-tab.active[data-variant="apply"] {
    background: linear-gradient(135deg, #0d46df, #3087ff);
    box-shadow: 0 25px 45px rgba(13, 94, 244, 0.35);
}

.program-tab.active[data-variant="foundation"] {
    background: linear-gradient(135deg, #ff5f6d, #ff9966);
    box-shadow: 0 25px 45px rgba(255, 111, 97, 0.35);
}

.program-tab:not(.active):hover {
    background: var(--bg-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.program-tab:focus-visible {
    outline: 3px solid rgba(0, 113, 227, 0.35);
    outline-offset: 2px;
}

.program-tab.is-pressed {
    filter: brightness(0.98);
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.programs-experience {
    margin-top: var(--spacing-md);
}

.program-panel-shell {
    border-radius: 36px;
    padding: var(--spacing-lg);
    border: 2px solid transparent;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.program-panel-shell.shell-apply {
    background:
        linear-gradient(var(--bg-white), var(--bg-white)) padding-box,
        linear-gradient(135deg, #0d46df, #3087ff) border-box;
    box-shadow: 0 25px 45px rgba(13, 94, 244, 0.25);
}

.program-panel-shell.shell-foundation {
    background:
        linear-gradient(var(--bg-white), var(--bg-white)) padding-box,
        linear-gradient(135deg, #ff5f6d, #ff9966) border-box;
    box-shadow: 0 25px 45px rgba(255, 111, 97, 0.25);
}

.program-panels {
    position: relative;
}

.program-panel {
    display: none;
    background: transparent;
}

.program-panel.active {
    display: block;
    animation: fadeInUp 0.4s ease;
}

.program-panel-header h3 {
    font-size: 1.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-sm) 0;
}

.program-panel-header p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

.program-panel-label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 1rem;
    border-radius: 999px;
    background: rgba(13, 70, 223, 0.12);
    color: #0d46df;
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.label-foundation {
    background: rgba(255, 95, 109, 0.15);
    color: #ff5f6d;
}

.program-panel-apply .program-panel-header h3 {
    color: #0d46df;
}

.program-panel-foundation .program-panel-header h3 {
    color: #ff5f6d;
}

.program-panel-body {
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
}

.program-panel-row {
    padding: 1rem 0;
}

.program-panel-row + .program-panel-row {
    border-top: 1px solid rgba(0, 113, 227, 0.12);
}

.program-panel-foundation .program-panel-row + .program-panel-row {
    border-top-color: rgba(255, 95, 109, 0.18);
}

.program-panel-row h4 {
    margin: 0 0 0.5rem;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #0d46df;
}

.program-panel-row h4::before {
    content: '▹';
    margin-right: 0.35rem;
    color: currentColor;
}

.program-panel-foundation .program-panel-row h4 {
    color: #ff5f6d;
}

.program-panel-row p {
    margin: 0;
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 1.05rem;
}

.program-panel-row ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.program-panel-row ul li {
    position: relative;
    padding-left: 1.4rem;
    color: var(--text-primary);
    font-size: 1.05rem;
    line-height: 1.8;
}

.program-panel-row ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: currentColor;
}

.program-panel-item ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.program-panel-item ul li {
    color: var(--text-primary);
    line-height: 1.7;
    position: relative;
    padding-left: 1.4rem;
}

.program-panel-item ul li + li {
    margin-top: 0.4rem;
}

.program-panel-item ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
}

.meta-label {
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.meta-value {
    font-size: 1.05rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.program-note-text {
    margin-top: var(--spacing-lg);
    font-size: 1.3rem;
    font-weight: 600;
    text-align: center;
    background: linear-gradient(135deg, #0d46df, #ff5f6d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.program-note-text.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   三阶段培养体系（新版交互Tabs）
   ============================================ */

.stage-tabs-wrapper { max-width: 900px; margin: 0 auto var(--spacing-lg); }
.stage-tabs { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--spacing-md); }
.stage-tab { border: 1px solid rgba(0, 0, 0, 0.05); border-radius: 18px; padding: 1.5rem; text-align: center; background: var(--bg-white); font-family: var(--font-family); cursor: pointer; transition: var(--transition); color: var(--text-primary); box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 0.4rem; }
.stage-tab span { font-size: 1.15rem; font-weight: 600; letter-spacing: 0.02em; }
.stage-tab small { font-size: 0.9rem; color: var(--text-secondary); }
.stage-tab.active { color: var(--bg-white); border-color: transparent; transform: translateY(-6px); }
.stage-tab.active[data-variant="p1"] { background: linear-gradient(135deg, #0d46df, #3087ff); box-shadow: 0 25px 45px rgba(13, 94, 244, 0.35); }
.stage-tab.active[data-variant="p2"] { background: linear-gradient(135deg, #ff5f6d, #ff9966); box-shadow: 0 25px 45px rgba(255, 111, 97, 0.35); }
.stage-tab.active[data-variant="p3"] { background: linear-gradient(135deg, #6a5cff, #9b6bff); box-shadow: 0 25px 45px rgba(106, 92, 255, 0.35); }
/* 强制第三阶段交互框使用蓝紫色（覆盖其他规则） */
.stage-tabs .stage-tab.active[data-variant="p3"] {
    background: linear-gradient(135deg, #6a5cff, #9b6bff) !important;
    box-shadow: 0 25px 45px rgba(106, 92, 255, 0.35) !important;
    color: #fff !important;
}
.stage-tabs .stage-tab.active[data-variant="p3"] small { color: rgba(255,255,255,0.9) !important; }
.stage-tab { min-width: 48px; min-height: 48px; }
.stage-tab:not(.active):hover { background: var(--bg-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.stage-tab:focus-visible { outline: 3px solid rgba(0,113,227,0.35); outline-offset: 2px; }
.stage-tab.is-pressed { filter: brightness(0.98); transform: translateY(0); box-shadow: var(--shadow-sm); }

.stages-experience { margin-top: var(--spacing-md); }
.stage-panel-shell { border-radius: 36px; padding: var(--spacing-lg); border: 2px solid transparent; box-shadow: var(--shadow-lg); transition: var(--transition); }
.stage-panel-shell.shell-p1 { background: linear-gradient(var(--bg-white), var(--bg-white)) padding-box, linear-gradient(135deg, #0d46df, #3087ff) border-box; box-shadow: 0 25px 45px rgba(13, 94, 244, 0.25); }
.stage-panel-shell.shell-p2 { background: linear-gradient(var(--bg-white), var(--bg-white)) padding-box, linear-gradient(135deg, #ff5f6d, #ff9966) border-box; box-shadow: 0 25px 45px rgba(255, 111, 97, 0.25); }
.stage-panel-shell.shell-p3 { background: linear-gradient(var(--bg-white), var(--bg-white)) padding-box, linear-gradient(135deg, #6a5cff, #9b6bff) border-box; box-shadow: 0 25px 45px rgba(106, 92, 255, 0.25); }

.stage-panels { position: relative; }
.stage-panel { display: none; background: transparent; }
.stage-panel.active { display: block; animation: fadeInUp 0.4s ease; }

/* 高级感增强：玻璃拟态外壳与内容栅格 */
.stage-panel-shell {
    backdrop-filter: saturate(140%) blur(10px);
    -webkit-backdrop-filter: saturate(140%) blur(10px);
}

/* 卡片顶部三要点，渲染为浅色信息块 */
.stage-card > ul {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.6rem;
    margin: var(--spacing-sm) 0 var(--spacing-sm);
}
@media (min-width: 992px) {
    .stage-card > ul { grid-template-columns: repeat(2, 1fr); }
}
.stage-card > ul li {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
    padding-left: 1.4rem; /* 保留与自定义圆点对齐 */
}

/* 展开区：去大框，使用流式分节 */
.stage-expand-inner {
    display: block;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
}
/* 移除课程表入口与容器 */
.stage-curriculum { display: none !important; }
.open-curriculum-inline { display: none !important; }

/* 分节呈现为标签+列表 */
.stage-expand-section { padding: 0; }
.stage-expand-section + .stage-expand-section { margin-top: 1rem; }
.stage-expand-section h5 {
    display: inline-block;
    margin: 0 0 0.5rem;
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    font-size: 0.9rem;
    letter-spacing: 0.04em;
    font-weight: 700;
}
#stage-1 .stage-expand-section h5 { background: rgba(13,70,223,0.08); color: #0d46df; }
#stage-2 .stage-expand-section h5 { background: rgba(255,95,109,0.12); color: #ff5f6d; }
#stage-3 .stage-expand-section h5 { background: rgba(0,200,140,0.12); color: #6a5cff; }

.stage-expand-section ul { margin: 0.25rem 0 0; }
.stage-expand-section ul li { line-height: 1.9; color: var(--text-primary); }

/* 第二阶段：通用对勾（参考第一阶段） */
#stage-2 .stage-expand-section h5 + ul { list-style: none; padding-left: 0; }
#stage-2 .stage-expand-section h5 + ul > li { position: relative; padding-left: 1.4rem; }
#stage-2 .stage-expand-section h5 + ul > li::before { content: '✓'; position: absolute; left: 0; top: 0.15rem; color: #ff5f6d; font-weight: 700; }

/* 第二阶段：关键任务 - 顶层编号 一、二、三、 不显示对勾 */
#stage-2 .tasks-section > ul { list-style: none; padding-left: 0; }
#stage-2 .tasks-section > ul > li { position: relative; padding-left: 2rem; }
#stage-2 .tasks-section > ul > li::before { position: absolute; left: 0; top: 0; color: #ff5f6d; font-weight: 700; }
#stage-2 .tasks-section > ul > li:nth-child(1)::before { content: '一、'; }
#stage-2 .tasks-section > ul > li:nth-child(2)::before { content: '二、'; }
#stage-2 .tasks-section > ul > li:nth-child(3)::before { content: '三、'; }

/* 第二阶段：关键任务 - 二级条目对勾 */
#stage-2 .tasks-section ul ul { list-style: none; padding-left: 0; }
#stage-2 .tasks-section ul ul > li { position: relative; padding-left: 1.4rem; }
#stage-2 .tasks-section ul ul > li::before { content: '✓'; position: absolute; left: 0; top: 0.15rem; color: #ff5f6d; font-weight: 700; }
.stage-expand-section h5 {
    margin: 0 0 0.5rem;
    font-size: 0.95rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
#stage-1 .stage-expand-section h5 { color: #0d46df; }
#stage-2 .stage-expand-section h5 { color: #ff5f6d; }
#stage-3 .stage-expand-section h5 { background: rgba(106, 92, 255, 0.12); color: #6a5cff; }

/* 课程表视觉优化 */
.table-scroll { border-radius: 16px; }
.curriculum-table { border-collapse: separate; border-spacing: 0; }
.curriculum-table thead th:first-child { border-top-left-radius: 8px; }
.curriculum-table thead th:last-child { border-top-right-radius: 8px; }
.curriculum-table tbody tr:hover { background: rgba(0,0,0,0.03); }

/* 高级感标签与信息条 */
.stage-header { display: flex; align-items: center; justify-content: flex-start; gap: 0.6rem; margin: 0.25rem 0 0.5rem; }
.stage-label { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.35rem 0.8rem; border-radius: 999px; font-size: 0.85rem; font-weight: 600; letter-spacing: 0.05em; }
.label-p1 { background: rgba(13,70,223,0.12); color: #0d46df; }
.label-p2 { background: rgba(255,95,109,0.15); color: #ff5f6d; }
.label-p3 { background: rgba(0,200,140,0.15); color: #6a5cff; }
.stage-meta { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.meta-chip { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.45rem 0.9rem; border-radius: 12px; background: rgba(0,0,0,0.04); color: var(--text-primary); border: 1px solid rgba(0,0,0,0.08); font-size: 0.95rem; font-weight: 600; }

/* 标题与段落微调 */
.stage-card h3 { font-size: 1.7rem; margin-bottom: 0.25rem; letter-spacing: -0.3px; }
.stage-card p { font-size: 1.02rem; }

/* 区块背景氛围（仅stages） */
#stages { position: relative; overflow: hidden; }
#stages::before { content: ""; position: absolute; inset: -20% -10% auto -10%; height: 60%; background: radial-gradient(60% 60% at 20% 20%, rgba(13,70,223,0.08), transparent 60%), radial-gradient(50% 50% at 80% 0%, rgba(255,95,109,0.07), transparent 60%); pointer-events: none; }

/* 标题与芯片并排 */
.stage-title-row { display: flex; align-items: baseline; gap: 0.75rem; flex-wrap: wrap; }
.stage-title-row h3 { margin: 0; }
.stage-title-row .stage-meta { display: inline-flex; gap: 0.5rem; align-items: center; }

/* 旧卡片总览保持，但移动端仍可显示为栅格（hidden时不显示） */
/* 强制隐藏所有旧版三列卡片，避免重复 */
#stages .stage-overview { display: none !important; }

/* 苹果风格统一：轻边框、轻阴影、白底 */
.stage-tabs-wrapper { max-width: 900px; margin: 0 auto var(--spacing-lg); }
.stage-tabs { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--spacing-md); }
.stage-tab { border: 1px solid rgba(0, 0, 0, 0.05); border-radius: 18px; padding: 1.5rem; text-align: center; background: var(--bg-white); font-family: var(--font-family); cursor: pointer; transition: var(--transition); color: var(--text-primary); box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 0.4rem; }
.stage-tab span { font-size: 1.15rem; font-weight: 600; letter-spacing: 0.02em; }
.stage-tab small { font-size: 0.9rem; color: var(--text-secondary); }
.stage-tab.active { color: var(--bg-white); border-color: transparent; transform: translateY(-6px); }
.stage-tab.active[data-variant="p1"] { background: linear-gradient(135deg, #0d46df, #3087ff); box-shadow: 0 25px 45px rgba(13, 94, 244, 0.35); }
.stage-tab.active[data-variant="p2"] { background: linear-gradient(135deg, #ff5f6d, #ff9966); box-shadow: 0 25px 45px rgba(255, 111, 97, 0.35); }
.stage-tab.active[data-variant="p3"] { background: linear-gradient(135deg, #6a5cff, #9b6bff); box-shadow: 0 25px 45px rgba(0, 200, 140, 0.35); }

.stage-panel-shell { background: transparent; border: none; border-radius: 0; box-shadow: none; padding: 0; }
.stage-panel-shell.shell-p1, .stage-panel-shell.shell-p2, .stage-panel-shell.shell-p3 { background: transparent; border-color: transparent; box-shadow: none; }

/* 去除区块背景光晕 */
#stages::before { display: none; }

/* 去除第一阶段外层大框，内容更贴合 */
#stage-panel-shell.shell-p1 { }
#stage-1 .stage-card { }
#stage-1 .stage-expand-inner { margin-top: var(--spacing-sm); }

/* 课程表改为弹窗，隐藏内联表 */
.stage-curriculum .subexpand-head, .stage-curriculum .table-wrapper { display: none !important; }
.open-curriculum { margin-top: 0.5rem; }

.stage-overview {
    display: grid;
    grid-template-columns: repeat(3, minmax(240px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stage-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 24px;
    padding: var(--spacing-lg);
    border: 1px solid rgba(0, 113, 227, 0.08);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.stage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-blue);
}

.stage-card:nth-child(2)::before {
    background: #ff6f61;
}

.stage-card:nth-child(3)::before {
    background: #6a5cff;
}

/* 面板模式下，确保第二阶段顶部色条为红色 */
#stage-2 .stage-card::before {
    background: #ff5f6d;
}

.stage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.stage-card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.stage-order {
    font-size: 2rem;
    font-weight: 600;
    color: rgba(0, 113, 227, 0.6);
}

.stage-card:nth-child(2) .stage-order {
    color: rgba(255, 111, 97, 0.6);
}

.stage-card:nth-child(3) .stage-order {
    color: rgba(0, 200, 140, 0.6);
}

.stage-duration {
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
    white-space: nowrap;
}

.stage-card h3 {
    font-size: 1.4rem;
    margin: 0 0 var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 600;
}

.stage-card > p:first-of-type {
    margin: 0 0 var(--spacing-sm);
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.stage-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.stage-card ul li {
    position: relative;
    padding-left: 1.4rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.stage-card ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
}

.stage-card:nth-child(2) ul li::before {
    color: #ff6f61;
}

.stage-card:nth-child(3) ul li::before {
    color: #6a5cff;
}

.stage-expand-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: var(--spacing-sm);
    padding: 0.6rem 1rem;
    background: transparent;
    border: 1px solid rgba(0, 113, 227, 0.3);
    border-radius: 8px;
    color: var(--primary-blue);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-family);
}

.stage-card:nth-child(2) .stage-expand-btn {
    border-color: rgba(255, 111, 97, 0.3);
    color: #ff6f61;
}

.stage-card:nth-child(3) .stage-expand-btn {
    border-color: rgba(0, 200, 140, 0.3);
    color: #6a5cff;
}

/* 新版通过panel id控制配色 */
#stage-2 .stage-expand-btn { border-color: rgba(255,111,97,0.3); color: #ff6f61; }
#stage-2 .stage-order { color: #ff5f6d; }
#stage-2 .stage-meta .meta-chip { border-color: rgba(255,95,109,0.35); color: #ff5f6d; background: rgba(255,95,109,0.06); }
#stage-2 .stage-card ul li::before { color: #ff5f6d; }
/* 第三阶段蓝紫主题 */
#stage-3 .stage-order { color: #6a5cff; }
#stage-3 .stage-card::before { background: #6a5cff; }
#stage-3 .stage-meta .meta-chip { border-color: rgba(106,92,255,0.35); color: #6a5cff; background: rgba(106,92,255,0.06); }
#stage-3 .stage-card ul li::before { color: #6a5cff; }
#stage-3 .stage-expand-btn { border-color: rgba(106,92,255,0.35); color: #6a5cff; }
#stage-3 .stage-expand-btn:hover { background: rgba(106,92,255,0.08); border-color: rgba(106,92,255,0.55); }

/* 第三阶段：对齐“关键任务”“考核方式”标签，顶层条目不显示对勾 */
#stage-3 .stage-expand-section h5 + ul { list-style: none; padding-left: 0; }
#stage-3 .tasks-section > ul > li { padding-left: 0 !important; position: relative; }
#stage-3 .tasks-section > ul > li::before { content: none !important; }
/* 第二层条目显示蓝紫对勾 */
#stage-3 .tasks-section ul ul { list-style: none; padding-left: 0; }
#stage-3 .tasks-section ul ul > li { position: relative; padding-left: 1.4rem; }
#stage-3 .tasks-section ul ul > li::before { content: '✓'; position: absolute; left: 0; top: 0.15rem; color: #6a5cff; font-weight: 700; }
/* 顶层编号“一、二、三、”设为蓝紫色 */
#stage-3 .tasks-section > ul > li > strong { color: #6a5cff; }

/* 第三阶段：统一所有可能的切换/收起按钮的边框颜色为蓝紫 */
#stage-3 button,
#stage-3 .btn,
#stage-3 .table-toggle,
#stage-3 .collapse-toggle,
#stage-3 summary {
    border: 1px solid rgba(106,92,255,0.35) !important;
    color: #6a5cff !important;
}
#stage-3 button:hover,
#stage-3 .btn:hover,
#stage-3 .table-toggle:hover,
#stage-3 .collapse-toggle:hover,
#stage-3 summary:hover {
    background: rgba(106,92,255,0.08) !important;
    border-color: rgba(106,92,255,0.55) !important;
}
#stage-3 .stage-expand-btn { border-color: rgba(0,200,140,0.3); color: #6a5cff; }

.stage-actions { display: inline-flex; gap: 0.5rem; align-items: center; margin-top: 0.25rem; flex-wrap: wrap; }

/* 在培养体系里，副按钮用浅描边，便于在白底上可见 */
#stages .btn.btn-secondary { border: 1px solid rgba(0,0,0,0.12); color: var(--text-primary); background: transparent; padding: 0.6rem 1rem; }
#stages .btn.btn-secondary:hover { background: var(--bg-light); }

.stage-expand-btn:hover {
    background: rgba(0, 113, 227, 0.08);
    border-color: rgba(0, 113, 227, 0.5);
}

#stage-2 .stage-expand-btn:hover { background: rgba(255,111,97,0.08); border-color: rgba(255,111,97,0.5); }
#stage-3 .stage-expand-btn:hover { background: rgba(0,200,140,0.08); border-color: rgba(0,200,140,0.5); }

.stage-expand-btn svg {
    transition: transform 0.3s ease;
}

.stage-expand-btn[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

.stage-expand-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
    will-change: max-height;
}

.stage-expand-content.open {
    max-height: 3000px; /* 足够大以容纳展开内容 */
    opacity: 1;
    overflow: visible; /* 展开后允许内容溢出显示与页面滚动 */
}

.stage-expand-inner {
    padding: var(--spacing-md) 0;
    border-top: 1px solid rgba(0, 113, 227, 0.1);
    margin-top: var(--spacing-sm);
}

.stage-card:nth-child(2) .stage-expand-inner {
    border-top-color: rgba(255, 111, 97, 0.1);
}

.stage-card:nth-child(3) .stage-expand-inner {
    border-top-color: rgba(0, 200, 140, 0.1);
}

.stage-expand-inner h5 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stage-expand-inner ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.stage-expand-inner ul li {
    position: relative;
    padding-left: 1.4rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.stage-expand-inner ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: 600;
}

/* 分节样式（合并为单框后，移除分隔线，仅保留轻微间距） */
.stage-expand-section + .stage-expand-section {
    margin-top: 0.6rem;
    padding-top: 0;
    border-top: none;
}

/* 第一阶段课程表子折叠 */
.stage-curriculum .subexpand-head { margin-top: var(--spacing-sm); }
.table-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.9rem;
    background: transparent;
    border: 1px solid rgba(0, 113, 227, 0.3);
    color: var(--primary-blue);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}
.stage-card:nth-child(2) .table-toggle { border-color: rgba(255,111,97,0.3); color: #ff6f61; }
.stage-card:nth-child(3) .table-toggle { border-color: rgba(0,200,140,0.3); color: #6a5cff; }
.table-toggle:hover { background: rgba(0,113,227,0.08); }
.stage-card:nth-child(2) .table-toggle:hover { background: rgba(255,111,97,0.08); }
.stage-card:nth-child(3) .table-toggle:hover { background: rgba(0,200,140,0.08); }

.table-wrapper { margin-top: var(--spacing-sm); }
.table-scroll {
    overflow: auto;
    border: 1px solid rgba(0,0,0,0.06);
    border-radius: 12px;
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    max-height: 520px;
}
.table-title { margin: 0 0 0.5rem; font-size: 0.9rem; color: var(--text-secondary); }

.curriculum-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 0.95rem; }
.curriculum-table th, .curriculum-table td { padding: 0.75rem; border-bottom: 1px solid rgba(0,0,0,0.06); vertical-align: top; text-align: left; }
.curriculum-table thead th { position: sticky; top: 0; background: var(--bg-light); z-index: 1; font-weight: 600; font-size: 0.9rem; }
.curriculum-table tbody tr:nth-child(even) { background: rgba(0,113,227,0.03); }

.td-req ol { margin: 0; padding-left: 1.1rem; display: flex; flex-direction: column; gap: 0.3rem; }
.td-req ol li { line-height: 1.6; }

@media (max-width: 768px) {
    .table-scroll { max-height: 360px; }
}

.stage-card:nth-child(2) .stage-expand-inner ul li::before {
    color: #ff6f61;
}

.stage-card:nth-child(3) .stage-expand-inner ul li::before {
    color: #6a5cff;
}

.stage-detail-grid {
    margin-top: var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(3, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.stage-detail-card {
    background: rgba(0, 113, 227, 0.05);
    border-radius: 16px;
    padding: var(--spacing-md);
    border: 1px solid rgba(0, 113, 227, 0.1);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.stage-detail-card:nth-child(2) {
    background: rgba(255, 111, 97, 0.08);
    border-color: rgba(255, 111, 97, 0.12);
}

.stage-detail-card:nth-child(3) {
    background: rgba(0, 200, 140, 0.08);
    border-color: rgba(0, 200, 140, 0.12);
}

.stage-detail-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stage-detail-card h4 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.stage-detail-card p,
.stage-detail-card ul {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

.stage-detail-card ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.stage-detail-card ul li {
    padding-left: 1.2rem;
    position: relative;
}

.stage-detail-card ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: currentColor;
}

/* ============================================
   选拔与培养
   ============================================ */

.selection-flowchart {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.flow-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.flow-step {
    flex-shrink: 0;
}

.flow-card {
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    width: 160px;
    height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.flow-card.red {
    border-color: rgba(255, 59, 48, 0.4);
    border-width: 2px;
}

.flow-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.flow-card p {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.4;
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.flow-divider {
    width: 80%;
    height: 1px;
    border-top: 1px dashed rgba(0, 0, 0, 0.15);
    margin: 1rem 0;
}

.selection-summary {
    margin-top: 3rem;
    text-align: center;
}

.selection-summary p {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(90deg, #0071e3, #ff8e53);
}

@media (max-width: 768px) {
    .flow-row {
        flex-direction: column;
    }
    .flow-arrow {
        transform: rotate(90deg);
    }
}

/* ============================================
   服务
   ============================================ */

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.service-card:hover .service-title {
    color: var(--primary-blue);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
    color: var(--primary-blue);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.service-icon svg {
    width: 1em;
    height: 1em;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    transition: var(--transition);
}

.service-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   产品
   ============================================ */

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.product-card {
    background: var(--bg-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    width: 100%;
    height: 300px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-placeholder {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.product-info {
    padding: var(--spacing-md);
}

.product-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.product-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.product-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: inline-block;
}

.product-link:hover {
    color: var(--primary-blue-dark);
    transform: translateX(4px);
}

/* ============================================
   导师团队
   ============================================ */

.mentors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.mentor-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-left: 4px solid var(--primary-blue);
}

.mentor-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-left-color: var(--primary-blue-dark);
}

.mentor-card:hover .mentor-name {
    color: var(--primary-blue);
}

.mentor-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    transition: var(--transition);
}

.mentor-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.mentor-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   联系我们
   ============================================ */

.contact-content {
    display: flex;
    justify-content: center;
    padding-bottom: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-lg);
    justify-content: center;
    max-width: 960px;
    width: 100%;
    margin: 0 auto;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    flex-direction: row;
    align-items: center;
    text-align: left;
    gap: 1.5rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(0, 0, 0, 0.03);
    border-radius: 24px;
    flex: 1;
    min-width: 300px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-item:hover {
    background: #fff;
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.04);
    border-color: transparent;
}

.contact-icon {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    font-size: 1.75rem;
    background: rgba(0, 113, 227, 0.06);
    color: var(--primary-blue);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-bottom: 0;
    transition: var(--transition);
}

.contact-item:hover .contact-icon {
    background: var(--primary-blue);
    color: #fff;
    transform: scale(1.1);
}

.contact-details {
    flex: 1;
}

.contact-details h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
}

.contact-details p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

.contact-icon svg {
    width: 32px;
    height: 32px;
}

.contact-details h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-details p {
    font-size: 1rem;
    color: var(--text-secondary);
}



/* ============================================
   页脚
   ============================================ */

.footer {
    background: var(--text-primary);
    color: var(--bg-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-logo h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-blue);
}

.footer-logo p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--bg-white);
}

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

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: var(--bg-white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

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

/* ============================================
   交互框（Modal）
   ============================================ */

body.modal-open {
    overflow: hidden;
}

/* 可点击卡片提示 */
.service-card, .mentor-card, .principle-card, .stage-card, .projects-card {
    cursor: pointer;
}

.stage-expand-btn:focus-visible {
    outline: 3px solid rgba(0, 113, 227, 0.35);
    outline-offset: 2px;
}

.modal-close:focus-visible {
    outline: 3px solid rgba(0, 113, 227, 0.35);
    border-radius: 10px;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: saturate(130%) blur(4px);
    -webkit-backdrop-filter: saturate(130%) blur(4px);
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn 0.2s ease-out;
}

.modal {
    position: relative;
    width: min(760px, 92vw);
    max-height: 80vh;
    overflow: auto;
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 1.25rem 1.25rem 1rem;
    border: 1px solid rgba(0,0,0,0.06);
    animation: modalIn 0.25s ease-out;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 2rem 0.5rem 0;
    color: var(--text-primary);
}

.modal-content {
    color: var(--text-secondary);
    line-height: 1.8;
}

.modal-content ul {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.modal-content ul li {
    position: relative;
    padding-left: 1.2rem;
}

.modal-content ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
}

.modal-close {
    position: absolute;
    top: 8px;
    right: 8px;
    background: transparent;
    border: 0;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 8px;
    transition: var(--transition);
}

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

@keyframes modalIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* ============================================
   响应式设计
   ============================================ */

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 64px;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-md);
        padding: var(--spacing-md) 0;
    }

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

    .nav-toggle {
        display: flex;
    }

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

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

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

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

    .about-intro p {
        font-size: 1.125rem;
    }

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

    .principles-title {
        font-size: 1.75rem;
    }

    .resources-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }

    .contact-content {
        display: block;
    }
    
    .contact-info {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .contact-item {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

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

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

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

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

    .programs-layout {
        grid-template-columns: 1fr;
    }

    .program-card {
        padding: var(--spacing-lg);
    }

    .projects-criteria {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }

    .program-tabs {
        grid-template-columns: 1fr;
    }

    .stage-overview {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    }

    .stage-detail-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .photo-wall-marquee {
        border-radius: 20px;
        padding: var(--spacing-sm) 0;
    }

    .photo-wall-marquee::before,
    .photo-wall-marquee::after {
        width: 60px;
    }

    .photo-card {
        width: clamp(220px, 60vw, 360px);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    .program-tab {
        padding: 1rem;
    }

    .program-panel {
        padding: var(--spacing-md);
    }

    .stage-panel {
        padding: 0;
    }

    .stage-panels {
        padding: var(--spacing-md);
    }
}