/* 基础重置和变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #64ffda;
    --background-dark: #1a1a2e;
    --background-light: #16213e;
    --text-light: #ffffff;
    --text-dark: #333333;
    --card-bg: rgba(255, 255, 255, 0.1);
    --gradient-bg: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --error-color: #ff5252;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --info-color: #2196f3;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--background-dark);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(26, 26, 46, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
}

.logo i {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.register-btn {
    background: var(--gradient-bg);
    color: white !important;
    padding: 10px 20px !important;
    border-radius: 25px !important;
}

.register-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* 用户下拉菜单 */
.dropdown {
    position: relative;
}

.user-menu-toggle {
    cursor: pointer;
    user-select: none;
}

.user-menu-toggle i:last-child {
    transition: transform 0.3s ease;
    font-size: 0.8rem;
    margin-left: 5px;
}

.dropdown.show .user-menu-toggle i:last-child {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    min-width: 200px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
    margin-top: 8px;
}

.dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s ease;
    border-radius: 8px;
    margin: 4px;
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

.dropdown-item i {
    width: 16px;
    text-align: center;
    color: var(--accent-color);
}

.dropdown-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 8px 12px;
}

/* 移动端菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-light);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 3px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* 主要内容 */
main {
    padding-top: 80px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--background-dark), var(--background-light));
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::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="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.5;
}

.hero-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    text-align: center;
    position: relative;
    z-index: 1;
    padding: 80px 20px 20px;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    margin-bottom: 60px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--accent-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-bg);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: var(--text-light);
    border: 2px solid var(--primary-color);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

/* Game Preview */
.hero-game-preview {
    display: flex;
    justify-content: center;
    align-items: center;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 30px;
    background: var(--card-bg);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.block {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    animation: blockFloat 3s ease-in-out infinite;
}

.block-type-a {
    background: linear-gradient(45deg, #ff6b6b, #ff8e8e);
    color: white;
}

.block-type-b {
    background: linear-gradient(45deg, #4ecdc4, #7bdff2);
    color: white;
}

.block-type-a::before {
    content: "A";
}

.block-type-b::before {
    content: "B";
}

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

.block:nth-child(odd) {
    animation-delay: 0.5s;
}

/* Section Styling */
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
    background: linear-gradient(45deg, var(--accent-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Game Introduction */
.game-intro {
    padding: 100px 0;
    background: var(--background-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
}

.feature-icon {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-light);
}

.feature-card p {
    opacity: 0.9;
    line-height: 1.6;
}

/* Game Rules */
.game-rules {
    padding: 100px 0;
    background: var(--background-dark);
}

.rules-content {
    max-width: 800px;
    margin: 0 auto;
}

.rule-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    padding: 30px;
    background: var(--card-bg);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.rule-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    margin-right: 30px;
    flex-shrink: 0;
}

.rule-text h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--text-light);
}

.rule-text p {
    opacity: 0.9;
    line-height: 1.6;
}

/* Statistics */
.stats {
    padding: 100px 0;
    background: var(--background-light);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.stat-item {
    padding: 40px 20px;
    background: var(--card-bg);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.8;
}

/* Footer */
.footer {
    background: var(--background-dark);
    padding: 60px 0 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    margin-bottom: 20px;
    color: var(--accent-color);
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: var(--text-light);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-section ul li a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--background-dark);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

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

    .hero-container {
        padding: 60px 15px 20px;
    }

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

    .hero-buttons {
        justify-content: center;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .rule-item {
        flex-direction: column;
        text-align: center;
    }

    .rule-number {
        margin-right: 0;
        margin-bottom: 20px;
    }

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

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

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

    .game-board {
        grid-template-columns: repeat(2, 1fr);
    }

    .block {
        width: 50px;
        height: 50px;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 表单样式 */
.form-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 40px;
    background: var(--card-bg);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-light);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-submit {
    width: 100%;
    padding: 12px;
    background: var(--gradient-bg);
    border: none;
    border-radius: 25px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* 表格样式 */
.table-container {
    overflow-x: auto;
    background: var(--card-bg);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.table th {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
    font-weight: 600;
}

.table tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* 卡片样式 */
.card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-light);
}

.card-content {
    opacity: 0.9;
    line-height: 1.6;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* 通知样式 */
.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 1100;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: linear-gradient(45deg, #4CAF50, #45a049);
}

.notification.error {
    background: linear-gradient(45deg, #f44336, #da190b);
}

.notification.info {
    background: linear-gradient(45deg, #2196F3, #1976D2);
}

/* 排行榜筛选器样式 */
.filter-section {
    margin-top: 25px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.filter-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    align-items: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-group label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.filter-select {
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.filter-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

.filter-select option {
    background: var(--background-dark);
    color: white;
    padding: 8px;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--gradient-bg);
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    height: fit-content;
}

.filter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.filter-btn:active {
    transform: translateY(0);
}

/* 排行榜表格响应式 */
@media (max-width: 768px) {
    .filter-section {
        grid-template-columns: 1fr;
    }
    
    .filter-btn {
        width: 100%;
        justify-content: center;
    }
} 

/* 通知系统 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 16px 20px;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    z-index: 10000;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideInRight 0.4s ease;
    font-size: 0.9rem;
}

.notification i:first-child {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.notification-success {
    border-left: 4px solid var(--success-color);
}

.notification-success i:first-child {
    color: var(--success-color);
}

.notification-error {
    border-left: 4px solid var(--error-color);
}

.notification-error i:first-child {
    color: var(--error-color);
}

.notification-warning {
    border-left: 4px solid var(--warning-color);
}

.notification-warning i:first-child {
    color: var(--warning-color);
}

.notification-info {
    border-left: 4px solid var(--info-color);
}

.notification-info i:first-child {
    color: var(--info-color);
}

.notification span {
    flex: 1;
    color: var(--text-light);
}

.notification-close {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.notification-close:hover {
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.1);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 模态框 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: linear-gradient(135deg, var(--background-dark), var(--background-light));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: scaleIn 0.3s ease;
}

.modal-header {
    padding: 24px 24px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: var(--accent-color);
    font-size: 1.3rem;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-size: 1.2rem;
}

.modal-close:hover {
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.1);
}

.modal-body {
    padding: 24px;
}

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

@keyframes scaleIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* 用户信息显示 */
.user-profile-info {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    font-weight: bold;
    flex-shrink: 0;
}

.profile-details h3 {
    color: var(--accent-color);
    margin-bottom: 8px;
}

.profile-details p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 4px;
    font-size: 0.9rem;
}

.profile-details code {
    background: rgba(100, 255, 218, 0.2);
    color: var(--accent-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}

/* 货币显示 */
.currencies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.currency-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.currency-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.currency-name {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.currency-value {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.1rem;
}

/* FRC信息显示 */
.frc-info {
    text-align: center;
}

.frc-code-display {
    margin-bottom: 20px;
}

.frc-code-display label {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.frc-code {
    background: rgba(0, 0, 0, 0.3);
    border: 2px dashed var(--accent-color);
    border-radius: 10px;
    padding: 16px;
    font-family: 'Courier New', monospace;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.frc-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 24px;
}

.frc-benefits {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 20px;
    text-align: left;
}

.frc-benefits h4 {
    color: var(--accent-color);
    margin-bottom: 12px;
    text-align: center;
}

.frc-benefits ul {
    list-style: none;
    padding: 0;
}

.frc-benefits li {
    padding: 8px 0;
    color: rgba(255, 255, 255, 0.8);
    position: relative;
    padding-left: 20px;
}

.frc-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    text-align: center;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--gradient-bg);
    color: white;
}

.btn-primary:hover {
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    box-shadow: 0 8px 25px rgba(76, 175, 80, 0.4);
}

.btn-danger {
    background: var(--error-color);
    color: white;
}

.btn-danger:hover {
    box-shadow: 0 8px 25px rgba(255, 82, 82, 0.4);
}

/* 表单样式增强 */
.form-container {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: var(--text-light);
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: var(--text-light);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(100, 255, 218, 0.1);
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-submit {
    width: 100%;
    padding: 14px 24px;
    background: var(--gradient-bg);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.form-submit:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.form-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--background-dark);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 50px;
        transition: 0.3s;
        z-index: 999;
    }

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

    .nav-menu li {
        margin: 15px 0;
    }

    .hamburger {
        display: flex;
    }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        background: rgba(255, 255, 255, 0.05);
        margin-top: 10px;
        width: 100%;
    }

    .notification {
        right: 10px;
        left: 10px;
        max-width: none;
    }

    .modal-content {
        margin: 10px;
        max-height: 90vh;
    }

    .modal-header,
    .modal-body {
        padding: 20px;
    }

    .user-profile-info {
        flex-direction: column;
        text-align: center;
    }

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

    .frc-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* 主页面特定样式 */
.login-section,
.register-section {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--background-dark), var(--background-light));
    min-height: 100vh;
}

.login-container,
.register-container {
    max-width: 500px;
    margin: 0 auto;
}

.login-header,
.register-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1,
.register-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(45deg, var(--accent-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p,
.register-header p {
    opacity: 0.8;
    font-size: 1.1rem;
}

/* 页脚样式 */
.footer {
    background: var(--background-dark);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px 0 20px;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h3 {
    color: var(--accent-color);
    margin-bottom: 15px;
}

.footer-section p,
.footer-section li {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 8px;
}

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

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

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}