/**
 * Crypto 统一响应式样式
 * 适用于所有 crypto 前台页面
 * 支持：移动端 + PC端 + 平板响应式适配
 */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #0a0e1a;
    color: #ffffff;
    min-height: 100vh;
    padding-bottom: 70px; /* 为底部导航留空间 */
}

/* ========== PC端顶部导航栏 ========== */
.pc-top-nav {
    display: none;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(10px);
    padding: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.pc-nav-left {
    display: flex;
    align-items: center;
    gap: 40px;
}

.pc-nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.pc-nav-links a {
    color: #8a8f9e;
    text-decoration: none;
    padding: 20px 10px;
    display: block;
    transition: color 0.3s;
    font-size: 15px;
}

.pc-nav-links a:hover,
.pc-nav-links a.active {
    color: #00d4ff;
}

/* ========== 移动端顶部导航 ========== */
.mobile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: bold;
}

.logo img,
.logo svg {
    width: 32px;
    height: 32px;
}

/* ========== 语言选择器 ========== */
.lang-selector {
    position: relative;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    transition: background 0.3s;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: #1a1f2e;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    max-height: 400px;
    overflow-y: auto;
    display: none;
    min-width: 180px;
    z-index: 1000;
}

.lang-dropdown.active {
    display: block;
}

.lang-item {
    padding: 12px 20px;
    cursor: pointer;
    transition: background 0.2s;
}

.lang-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.lang-item.active {
    color: #00d4ff;
}

/* ========== 内容区域 ========== */
.main-content {
    padding: 20px;
}

/* ========== 底部导航栏 ========== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 8px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 999;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: #8a8f9e;
    font-size: 11px;
    padding: 4px 8px;
    transition: all 0.3s;
}

.nav-item:hover {
    opacity: 0.8;
}

.nav-item.active {
    color: #00d4ff;
}

.nav-item.active .nav-icon {
    fill: #00d4ff;
}

.nav-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.nav-label {
    font-size: 11px;
}

/* ========== 通用卡片样式 ========== */
.card {
    background: #1a1f2e;
    border-radius: 12px;
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.card-title {
    font-size: 16px;
    font-weight: bold;
}

/* ========== 按钮样式 ========== */
.btn-primary {
    background: linear-gradient(135deg, #0066ff 0%, #00d4ff 100%);
    color: #fff;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s, opacity 0.2s;
    width: 100%;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-primary:active {
    transform: scale(0.98);
}

/* ========== 输入框样式 ========== */
.input-field {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 12px 15px;
    color: #fff;
    font-size: 14px;
    width: 100%;
    transition: border-color 0.3s;
}

.input-field:focus {
    outline: none;
    border-color: #00d4ff;
}

.input-field::placeholder {
    color: #8a8f9e;
}

/* ========== 列表样式 ========== */
.list-item {
    background: #1a1f2e;
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 10px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: background 0.3s;
}

.list-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

/* ========== 状态标签 ========== */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.status-success {
    background: rgba(0, 200, 83, 0.2);
    color: #00c853;
}

.status-warning {
    background: rgba(255, 193, 7, 0.2);
    color: #ffc107;
}

.status-danger {
    background: rgba(244, 67, 54, 0.2);
    color: #f44336;
}

.status-info {
    background: rgba(0, 212, 255, 0.2);
    color: #00d4ff;
}

/* ========== 数字显示 ========== */
.number-display {
    font-size: 24px;
    font-weight: bold;
    color: #00d4ff;
}

.number-display.small {
    font-size: 18px;
}

.number-display.large {
    font-size: 32px;
}

.text-muted {
    color: #8a8f9e;
    font-size: 12px;
}

.text-primary {
    color: #00d4ff;
}

.text-success {
    color: #00c853;
}

.text-danger {
    color: #f44336;
}

.text-warning {
    color: #ffc107;
}

/* ========== 加载动画 ========== */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #00d4ff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #8a8f9e;
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 14px;
}

/* ========== 分割线 ========== */
.divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 15px 0;
}

/* ========== 网格布局 ========== */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

/* ========== 响应式断点 ========== */

/* PC端适配 (>=768px) */
@media (min-width: 768px) {
    body {
        padding-bottom: 0;
    }
    
    /* 显示PC顶部导航,隐藏移动端header和底部导航 */
    .pc-top-nav {
        display: block;
    }
    
    .mobile-header {
        display: none;
    }
    
    .bottom-nav {
        display: none;
    }
    
    /* 内容区域居中 */
    .main-content {
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 20px;
    }
    
    /* 通用卡片PC样式 */
    .card {
        padding: 25px;
    }
    
    .card-title {
        font-size: 20px;
    }
    
    /* 按钮PC样式 */
    .btn-primary {
        width: auto;
        min-width: 200px;
        padding: 14px 28px;
        font-size: 16px;
    }
    
    /* 网格PC样式 */
    .grid-2 {
        gap: 20px;
    }
    
    .grid-3 {
        gap: 20px;
    }
    
    .grid-4 {
        gap: 20px;
    }
    
    /* 列表项PC样式 */
    .list-item {
        padding: 20px;
    }
    
    /* 数字显示PC样式 */
    .number-display {
        font-size: 32px;
    }
    
    .number-display.small {
        font-size: 24px;
    }
    
    .number-display.large {
        font-size: 40px;
    }
}

/* 超大屏 (>=1200px) */
@media (min-width: 1200px) {
    .pc-nav-container {
        max-width: 1400px;
    }
    
    .main-content {
        max-width: 1400px;
    }
}

/* 平板 (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .main-content {
        max-width: 900px;
        padding: 30px 15px;
    }
    
    .pc-nav-links {
        gap: 20px;
    }
    
    .pc-nav-links a {
        padding: 15px 8px;
        font-size: 14px;
    }
}

/* 移动端 (<768px) */
@media (max-width: 767px) {
    body {
        padding-bottom: 70px;
    }
    
    .mobile-header {
        display: flex;
    }
    
    .bottom-nav {
        display: flex;
    }
    
    .pc-top-nav {
        display: none;
    }
}

/* 超小屏 (iPhone SE等 <375px) */
@media (max-width: 375px) {
    .mobile-header {
        padding: 12px 15px;
    }
    
    .logo {
        font-size: 16px;
    }
    
    .logo img,
    .logo svg {
        width: 28px;
        height: 28px;
    }
    
    .lang-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .main-content {
        padding: 15px;
    }
    
    .card {
        padding: 12px;
        border-radius: 10px;
    }
    
    .card-title {
        font-size: 14px;
    }
    
    .btn-primary {
        padding: 10px 20px;
        font-size: 13px;
        border-radius: 10px;
    }
    
    .input-field {
        padding: 10px 12px;
        font-size: 13px;
    }
    
    .list-item {
        padding: 12px;
        border-radius: 10px;
    }
    
    .number-display {
        font-size: 20px;
    }
    
    .number-display.small {
        font-size: 16px;
    }
    
    .number-display.large {
        font-size: 28px;
    }
    
    .nav-label {
        font-size: 10px;
    }
    
    .nav-icon {
        width: 22px;
        height: 22px;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        gap: 8px;
    }
}

/* iPhone SE 第一代 (<320px) */
@media (max-width: 320px) {
    .main-content {
        padding: 10px;
    }
    
    .card {
        padding: 10px;
    }
    
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}