/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --accent-color: #ec4899;
    --gold-color: #d4a574;
    --dark-gold: #c49563;
    --dark-bg: #0f172a;
    --light-bg: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --warning-color: #f59e0b;
}

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--light-bg);
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 导航栏 ========== */
.navbar {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(124, 58, 237, 0.95));
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    font-size: 2.5rem;
    animation: float 3s ease-in-out infinite;
}

.brand-text h1 {
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.2;
}

.brand-subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.75rem;
    letter-spacing: 2px;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    align-items: center;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.nav-icon {
    font-size: 1.1rem;
}

.nav-link:hover,
.nav-link.active {
    color: white;
    background: rgba(255, 255, 255, 0.15);
}

.nav-link.contact-btn {
    background: linear-gradient(135deg, var(--gold-color), var(--dark-gold));
    color: white;
    margin-left: 0.5rem;
    box-shadow: 0 4px 15px rgba(212, 165, 116, 0.3);
}

.nav-link.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 165, 116, 0.4);
}

/* ========== Hero Section ========== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.animated-gradient {
    position: absolute;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        rgba(99, 102, 241, 0.4),
        rgba(168, 85, 247, 0.4),
        rgba(236, 72, 153, 0.4),
        rgba(59, 130, 246, 0.4)
    );
    animation: gradientMove 20s ease infinite;
}

@keyframes gradientMove {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-30%, -30%) rotate(120deg); }
    66% { transform: translate(30%, 30%) rotate(240deg); }
}

.hero-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
}

.shape-1 {
    width: 400px;
    height: 400px;
    top: 10%;
    left: 5%;
    animation: float 15s ease-in-out infinite;
}

.shape-2 {
    width: 300px;
    height: 300px;
    bottom: 15%;
    right: 10%;
    animation: float 12s ease-in-out infinite 2s;
}

.shape-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    right: 20%;
    animation: float 10s ease-in-out infinite 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) translateX(0px); }
    33% { transform: translateY(-30px) translateX(20px); }
    66% { transform: translateY(20px) translateX(-20px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 900px;
    padding: 2rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: fadeInDown 1s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.8; }
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    line-height: 1.2;
}

.hero-title .highlight {
    background: linear-gradient(to right, #ffd700, #ffed4e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.8rem;
    opacity: 0.95;
    margin-bottom: 1rem;
    font-weight: 300;
}

.hero-description {
    font-size: 1.2rem;
    opacity: 0.85;
    margin-bottom: 2.5rem;
}

.fade-in {
    animation: fadeInUp 1s ease;
}

.fade-in-delay {
    animation: fadeInUp 1s ease 0.2s backwards;
}

.fade-in-delay-2 {
    animation: fadeInUp 1s ease 0.4s backwards;
}

.fade-in-delay-3 {
    animation: fadeInUp 1s ease 0.6s backwards;
}

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

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

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.hero-btn {
    padding: 1rem 2.5rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.hero-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.hero-btn:hover::before {
    width: 300px;
    height: 300px;
}

.primary-btn {
    background: linear-gradient(135deg, var(--gold-color), var(--dark-gold));
    color: white;
    box-shadow: 0 10px 30px rgba(212, 165, 116, 0.4);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(212, 165, 116, 0.5);
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
}

.btn-arrow,
.play-icon {
    position: relative;
    z-index: 1;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-stat-item {
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
}

.stat-divider {
    width: 1px;
    background: rgba(255, 255, 255, 0.3);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: bounce 2s infinite;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 25px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 10px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 2px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { top: 10px; opacity: 1; }
    100% { top: 30px; opacity: 0; }
}

.arrow {
    display: flex;
    flex-direction: column;
}

.arrow span {
    width: 2px;
    height: 10px;
    background: rgba(255, 255, 255, 0.6);
    margin: 2px 0;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ========== 特色功能区 ========== */
.features-section {
    padding: 6rem 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1));
    color: var(--primary-color);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-item {
    padding: 2.5rem 2rem;
    background: white;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.1), transparent);
    transition: left 0.5s;
}

.feature-item:hover::before {
    left: 100%;
}

.feature-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    position: relative;
}

.icon-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    transform: rotate(45deg);
    opacity: 0.1;
    transition: all 0.3s ease;
}

.feature-item:hover .icon-bg {
    transform: rotate(45deg) scale(1.1);
    opacity: 0.2;
}

.feature-icon span {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2.5rem;
}

.feature-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== 板块区域 ========== */
.blocks-section {
    padding: 6rem 0;
    background: linear-gradient(180deg, #f8fafc 0%, #e7e9ef 100%);
}

.blocks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

.block-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.block-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(124, 58, 237, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 1;
}

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

.block-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.card-shine {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    transform: translateX(-100%) translateY(-100%) rotate(45deg);
    transition: transform 0.6s;
    pointer-events: none;
    z-index: 2;
}

.block-card:hover .card-shine {
    transform: translateX(100%) translateY(100%) rotate(45deg);
}

.card-animate {
    opacity: 0;
    animation: cardAppear 0.6s ease forwards;
}

.card-animate:nth-child(1) { animation-delay: 0.1s; }
.card-animate:nth-child(2) { animation-delay: 0.2s; }
.card-animate:nth-child(3) { animation-delay: 0.3s; }
.card-animate:nth-child(4) { animation-delay: 0.4s; }
.card-animate:nth-child(5) { animation-delay: 0.5s; }
.card-animate:nth-child(6) { animation-delay: 0.6s; }

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.block-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: linear-gradient(135deg, #ff6b6b, #ee5a6f);
    color: white;
    padding: 8px 20px;
    border-radius: 25px;
    font-size: 0.85rem;
    font-weight: 700;
    z-index: 10;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.badge-icon {
    animation: rotate 3s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.block-image {
    width: 100%;
    height: 220px;
    overflow: hidden;
    position: relative;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
    z-index: 1;
}

.block-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.block-card:hover .block-image img {
    transform: scale(1.15);
}

.block-content {
    padding: 2rem 1.5rem;
    position: relative;
    z-index: 2;
}

.block-header {
    margin-bottom: 1rem;
}

.block-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.title-decoration {
    flex: 1;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), transparent);
    border-radius: 2px;
}

.block-subtitle {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
}

.subtitle-icon {
    color: var(--gold-color);
}

.block-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-size: 0.95rem;
}

.block-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.feature-tag {
    padding: 0.4rem 1rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1));
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.block-actions {
    display: flex;
    gap: 1rem;
}

.btn-register,
.btn-login {
    flex: 1;
    padding: 14px;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-register {
    background: linear-gradient(135deg, var(--gold-color), var(--dark-gold));
    color: white;
    box-shadow: 0 4px 15px rgba(212, 165, 116, 0.3);
}

.btn-register::before,
.btn-login::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}

.btn-register:hover::before,
.btn-login:hover::before {
    width: 300px;
    height: 300px;
}

.btn-register:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(212, 165, 116, 0.4);
}

.btn-login {
    background: linear-gradient(135deg, #6b7d9e, #5a6a8a);
    color: white;
    box-shadow: 0 4px 15px rgba(107, 125, 158, 0.3);
}

.btn-login:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(107, 125, 158, 0.4);
}

.btn-icon {
    position: relative;
    z-index: 1;
    font-weight: 700;
}

/* ========== 关于我们 ========== */
.about-section {
    padding: 6rem 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-description {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem;
    background: var(--light-bg);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.about-feature:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(5px);
}

.feature-check {
    width: 24px;
    height: 24px;
    background: var(--success-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.about-stats {
    display: grid;
    gap: 2rem;
}

.stat-item {
    padding: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    color: white;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.25);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.35);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.stat-number {
    display: inline-block;
    font-size: 3.5rem;
    font-weight: 800;
}

.stat-plus {
    font-size: 2rem;
    font-weight: 700;
    margin-left: 0.2rem;
}

.stat-label {
    display: block;
    font-size: 1.1rem;
    opacity: 0.95;
    margin-top: 0.5rem;
}

.stat-progress {
    margin-top: 1rem;
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: white;
    border-radius: 3px;
    animation: progressGrow 2s ease-out;
}

@keyframes progressGrow {
    from { width: 0; }
}

/* ========== 联系我们 ========== */
.contact-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-info p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(10px);
}

.contact-icon {
    font-size: 2.5rem;
}

.contact-text h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.contact-text p {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
}

.contact-form {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-form h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1.5rem;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid transparent;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--gold-color);
    background: white;
}

.submit-btn {
    width: 100%;
    padding: 1.2rem;
    background: linear-gradient(135deg, var(--gold-color), var(--dark-gold));
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(212, 165, 116, 0.4);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--dark-bg);
    color: white;
    padding: 4rem 0 1.5rem;
    position: relative;
    overflow: hidden;
}

.footer-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color), var(--accent-color));
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    opacity: 0.8;
    line-height: 1.7;
    margin: 1rem 0 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

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

.footer-section li {
    margin-bottom: 0.8rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-section a:hover {
    color: white;
    transform: translateX(5px);
}

.contact-list li {
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .blocks-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        gap: 0.3rem;
        font-size: 0.9rem;
    }
    
    .nav-icon {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .stat-divider {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .blocks-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* ========== 外部链接板块 ========== */
.external-links-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.external-links-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    z-index: 1;
}

.external-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    position: relative;
    z-index: 2;
}

.external-link-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(37, 99, 235, 0.1);
}

.external-link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.external-link-card:hover::before {
    transform: scaleX(1);
}

.external-link-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.link-image {
    width: 100%;
    height: 200px;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    position: relative;
}

.link-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.external-link-card:hover .link-image img {
    transform: scale(1.05);
}

.link-content {
    text-align: center;
}

.link-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    position: relative;
}

.link-content h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.link-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
    color: white;
}

.btn-arrow {
    transition: transform 0.3s ease;
}

.link-btn:hover .btn-arrow {
    transform: translateX(3px);
}

.link-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.link-buttons .link-btn {
    flex: 1;
    min-width: 150px;
    max-width: 200px;
}

/* 响应式设计 - 外部链接 */
@media (max-width: 768px) {
    .external-links-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .external-link-card {
        padding: 1.5rem;
    }
    
    .link-image {
        height: 150px;
    }
    
    .link-buttons {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .link-buttons .link-btn {
        min-width: auto;
        max-width: none;
    }
}

/* ========== 特殊板块样式 ========== */
.special-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    position: relative;
    overflow: hidden;
}

.special-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="special-grid" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M 20 0 L 0 0 0 20" fill="none" stroke="%23ffffff" stroke-width="0.3" opacity="0.2"/></pattern></defs><rect width="100" height="100" fill="url(%23special-grid)"/></svg>');
    opacity: 0.4;
    z-index: 1;
}

.special-section::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: special-glow 8s ease-in-out infinite;
    z-index: 1;
}

@keyframes special-glow {
    0%, 100% {
        transform: rotate(0deg) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: rotate(180deg) scale(1.1);
        opacity: 0.6;
    }
}

.special-header {
    position: relative;
    z-index: 3;
    text-align: center;
    margin-bottom: 3rem;
}

.special-title {
    color: #ffffff !important;
    font-size: 2.5rem !important;
    font-weight: 800 !important;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    position: relative;
    display: inline-block;
    animation: special-title-pulse 3s ease-in-out infinite;
}

.special-title::before {
    content: '🔥';
    position: absolute;
    left: -3rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
    animation: special-emoji-bounce 2s ease-in-out infinite;
}

.special-title::after {
    content: '🔥';
    position: absolute;
    right: -3rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
    animation: special-emoji-bounce 2s ease-in-out infinite 1s;
}

@keyframes special-title-pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes special-emoji-bounce {
    0%, 100% {
        transform: translateY(-50%) rotate(0deg);
    }
    50% {
        transform: translateY(-60%) rotate(10deg);
    }
}

.special-section .external-link-card {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2), 0 5px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 2;
}

.special-section .external-link-card::before {
    background: linear-gradient(90deg, #ff6b6b, #ffa500, #ff6b6b) !important;
    background-size: 200% 100%;
    animation: special-border-flow 3s linear infinite;
}

@keyframes special-border-flow {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.special-section .link-btn {
    background: linear-gradient(135deg, #ff6b6b, #ff8e53) !important;
    color: white !important;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4) !important;
    position: relative;
    overflow: hidden;
}

.special-section .link-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s ease;
}

.special-section .link-btn:hover::before {
    left: 100%;
}

.special-section .link-btn:hover {
    transform: translateY(-5px) scale(1.05) !important;
    box-shadow: 0 15px 35px rgba(255, 107, 107, 0.6) !important;
}

/* 响应式设计 - 特殊板块 */
@media (max-width: 768px) {
    .special-title {
        font-size: 2rem !important;
    }
    
    .special-title::before,
    .special-title::after {
        display: none;
    }
    
    .special-section .external-link-card {
        padding: 1.5rem;
    }
}