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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --error-color: #dc2626;
    --success-color: #10b981;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

/* Hero Section */
.hero-section {
    padding: 60px 20px 80px;
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    margin-bottom: 20px;
}

/* Instructor Section */
.instructor-section {
    padding: 40px 20px 60px;
    background: transparent;
}

.main-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 60px;
    border-radius: 24px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.25);
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    width: 100%;
    box-sizing: border-box;
}

.main-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.2;
    text-align: center;
    color: white;
    position: relative;
    z-index: 1;
}

.highlight {
    color: var(--secondary-color);
    display: inline-block;
    text-shadow: 0 2px 10px rgba(245, 158, 11, 0.3);
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.95);
    position: relative;
    z-index: 1;
}

.event-info {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: 12px;
    padding: 30px;
    max-width: 600px;
    margin: 0 auto 60px;
    text-align: center;
}

.event-date {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.event-description {
    font-size: 1rem;
    color: var(--text-light);
}

.cta-button {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 20px 48px;
    border: none;
    border-radius: 12px;
    font-size: 1.15rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.35);
    position: relative;
    overflow: hidden;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    word-wrap: break-word;
    white-space: normal;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(37, 99, 235, 0.5);
}

.cta-button:active {
    transform: translateY(-1px);
}

.cta-center {
    text-align: center;
    margin-top: 30px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin: 0 0 50px;
    text-align: center;
    color: var(--text-dark);
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.highlight-red {
    color: var(--error-color);
}

.problem-list {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}

.problem-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 25px;
    margin-bottom: 20px;
    background: var(--bg-light);
    border-radius: 12px;
    border-left: 4px solid var(--error-color);
    font-size: 1.1rem;
}

.problem-item .icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.opportunity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 900px;
    margin: 0 auto 40px;
}

.opportunity-card {
    background: var(--bg-white);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.opportunity-card:hover {
    transform: translateY(-5px);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.opportunity-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
}

.instructor-content {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 60px;
    max-width: 1100px;
    margin: 0 auto;
    align-items: start;
}

.instructor-image-wrapper {
    position: relative;
    width: 100%;
}

.instructor-image {
    width: 100%;
    max-width: 350px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    position: relative;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 8px;
    margin: 0 auto;
}

.instructor-image::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #667eea, #764ba2, #f59e0b);
    border-radius: 20px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.instructor-image:hover::before {
    opacity: 0.3;
}

.instructor-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
    max-width: 100%;
    object-fit: cover;
}

.instructor-name {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 25px;
    color: var(--text-dark);
    background: linear-gradient(135deg, var(--primary-color), #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: left;
}

.instructor-descriptions {
    margin-bottom: 40px;
}

.instructor-description {
    font-size: 1.15rem;
    line-height: 1.9;
    margin-bottom: 24px;
    color: var(--text-light);
}

.highlight-text {
    color: var(--text-dark);
    font-weight: 600;
    font-size: 1.2rem;
    padding: 20px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.cta-wrapper {
    margin-top: 40px;
    text-align: left;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 20px 30px;
}

.disclaimer {
    max-width: 900px;
    margin: 0 auto;
    font-size: 0.9rem;
    line-height: 1.8;
    opacity: 0.9;
}

.disclaimer-title {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.disclaimer p {
    margin-bottom: 15px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-link {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-link:hover {
    opacity: 1;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 968px) {
    .instructor-content {
        grid-template-columns: 280px 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .hero-section {
        padding: 30px 15px 50px;
        margin-bottom: 90px;
    }

    .main-hero {
        padding: 50px 30px;
        border-radius: 20px;
        width: 100%;
        max-width: 100%;
    }

    .hero-title {
        font-size: 1.9rem;
        line-height: 1.3;
        word-wrap: break-word;
    }

    .hero-subtitle {
        font-size: 1.15rem;
        line-height: 1.5;
        word-wrap: break-word;
    }

    .instructor-section {
        padding: 20px 15px 30px;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 30px;
        padding-bottom: 12px;
        word-wrap: break-word;
    }

    .section-title::after {
        width: 60px;
        height: 3px;
    }

    .instructor-content {
        grid-template-columns: 1fr;
        gap: 25px;
        text-align: center;
        width: 100%;
    }

    .instructor-image-wrapper {
        max-width: 100%;
        width: 100%;
        margin: 0 auto 20px;
    }

    .instructor-image {
        width: 100%;
        max-width: 280px;
        margin: 0 auto;
    }

    .instructor-name {
        font-size: 1.8rem;
        margin-bottom: 20px;
        word-wrap: break-word;
        text-align: center;
    }

    .instructor-description {
        font-size: 1.05rem;
        line-height: 1.7;
        word-wrap: break-word;
        text-align: left;
    }

    .highlight-text {
        font-size: 1.1rem;
        padding: 18px;
        text-align: left;
        word-wrap: break-word;
    }

    .cta-wrapper {
        text-align: center;
        width: 100%;
        margin-top: 30px;
        padding-bottom: 20px;
    }

    .cta-button {
        width: 100%;
        max-width: 100%;
        padding: 18px 24px;
        font-size: 1rem;
        letter-spacing: 0.5px;
        word-wrap: break-word;
        white-space: normal;
        min-height: 50px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }

    .hero-section {
        padding: 25px 12px 40px;
        margin-bottom: 90px;
    }

    .main-hero {
        padding: 35px 20px;
        border-radius: 16px;
        width: 100%;
        max-width: 100%;
    }

    .hero-title {
        font-size: 1.5rem;
        line-height: 1.3;
        margin-bottom: 18px;
        word-wrap: break-word;
        hyphens: auto;
    }

    .hero-subtitle {
        font-size: 1.05rem;
        line-height: 1.5;
        word-wrap: break-word;
    }

    .instructor-section {
        padding: 15px 12px 25px;
    }

    .section-title {
        font-size: 1.4rem;
        margin-bottom: 25px;
        padding-bottom: 10px;
        word-wrap: break-word;
    }

    .section-title::after {
        width: 50px;
        height: 3px;
    }

    .instructor-content {
        gap: 20px;
    }

    .instructor-image-wrapper {
        margin-bottom: 15px;
    }

    .instructor-image {
        max-width: 240px;
        padding: 6px;
    }

    .instructor-name {
        font-size: 1.5rem;
        margin-bottom: 15px;
        word-wrap: break-word;
        text-align: center;
    }

    .instructor-descriptions {
        margin-bottom: 25px;
    }

    .instructor-description {
        font-size: 0.95rem;
        line-height: 1.7;
        margin-bottom: 16px;
        word-wrap: break-word;
        text-align: left;
    }

    .highlight-text {
        font-size: 0.98rem;
        padding: 14px;
        line-height: 1.6;
        word-wrap: break-word;
        text-align: left;
    }

    .cta-wrapper {
        width: 100%;
        margin-top: 25px;
        padding-bottom: 20px;
    }

    .cta-button {
        padding: 16px 20px;
        font-size: 0.95rem;
        width: 100%;
        max-width: 100%;
        letter-spacing: 0.5px;
        word-wrap: break-word;
        white-space: normal;
        border-radius: 10px;
        display: block;
        box-sizing: border-box;
        min-height: 50px;
    }
}

/* 超小屏幕优化 */
@media (max-width: 360px) {
    .container {
        padding: 0 10px;
    }

    .hero-section {
        padding: 20px 10px 35px;
        margin-bottom: 90px;
    }

    .main-hero {
        padding: 30px 15px;
    }

    .hero-title {
        font-size: 1.35rem;
    }

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

    .instructor-section {
        padding: 15px 10px 25px;
    }

    .section-title {
        font-size: 1.3rem;
        margin-bottom: 20px;
    }

    .instructor-image {
        max-width: 200px;
    }

    .instructor-name {
        font-size: 1.4rem;
        margin-bottom: 12px;
    }

    .instructor-description {
        font-size: 0.92rem;
    }

    .cta-button {
        font-size: 0.9rem;
        padding: 15px 18px;
        width: 100%;
        box-sizing: border-box;
        min-height: 48px;
    }

    .cta-wrapper {
        width: 100%;
        padding-bottom: 20px;
        margin-top: 20px;
    }

    .whatsapp-float {
        width: 52px;
        height: 52px;
        bottom: 12px;
        right: 12px;
    }

    .whatsapp-float svg {
        width: 26px;
        height: 26px;
    }
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

/* WhatsApp Floating Button */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 20px;
    right: 20px;
    background: #25D366;
    color: white;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    text-decoration: none;
    animation: pulse-whatsapp 2s infinite;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(37, 211, 102, 0.6);
}

.whatsapp-float:active {
    transform: scale(0.95);
}

.whatsapp-float svg {
    width: 32px;
    height: 32px;
    color: white;
}

.whatsapp-tooltip {
    position: absolute;
    right: 70px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.875rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    font-weight: 500;
}

.whatsapp-tooltip::after {
    content: '';
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: rgba(0, 0, 0, 0.9);
}

.whatsapp-float:hover .whatsapp-tooltip {
    opacity: 1;
}

@keyframes pulse-whatsapp {
    0% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    }
    50% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4), 0 0 0 10px rgba(37, 211, 102, 0.1);
    }
    100% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    }
}

/* 移动端触摸优化 */
@media (hover: none) and (pointer: coarse) {
    .cta-button {
        min-height: 48px;
        touch-action: manipulation;
    }
    
    .cta-button:active {
        transform: scale(0.98);
    }

    .whatsapp-float {
        width: 56px;
        height: 56px;
        bottom: 15px;
        right: 15px;
    }

    .whatsapp-float svg {
        width: 28px;
        height: 28px;
    }

    .whatsapp-tooltip {
        display: none;
    }
}

@media (max-width: 480px) {
    .whatsapp-float {
        width: 56px;
        height: 56px;
        bottom: 15px;
        right: 15px;
        z-index: 9999;
    }

    .whatsapp-float svg {
        width: 28px;
        height: 28px;
    }

    .whatsapp-tooltip {
        display: none;
    }
}

/* 确保按钮在移动端不被遮挡 */
@media (max-width: 768px) {
    body {
        padding-bottom: 100px;
    }
    
    .whatsapp-float {
        z-index: 9999;
        position: fixed;
    }
}

/* Loading State */
.cta-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Success Message */
.success-message {
    background: var(--success-color);
    color: white;
    padding: 15px 20px;
    border-radius: 8px;
    margin-top: 20px;
    text-align: center;
    font-weight: 600;
    display: none;
}

.success-message.show {
    display: block;
}