/* ==================== CSS 变量定义 ==================== */
:root {
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #3385ff;
    --secondary-color: #00d4ff;
    --accent-color: #7c3aed;
    --bg-dark: #0a0f1a;
    --bg-card: #111827;
    --bg-card-hover: #1f2937;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border-color: #1f2937;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-hero: linear-gradient(180deg, #0a0f1a 0%, #1a1f35 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 102, 255, 0.3);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* ==================== 重置与基础样式 ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-md), 0 0 20px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 102, 255, 0.5);
}

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

.btn-outline:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-xl {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.btn-block {
    width: 100%;
}

.btn-nav {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-cta {
    padding: 1rem 1.5rem;
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: 10px;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.cta-primary {
    background: linear-gradient(135deg, #00c853 0%, #00e676 100%);
    box-shadow: 0 4px 15px rgba(0, 200, 83, 0.4);
    animation: pulse-cta 2s infinite;
}

.cta-primary:hover {
    background: linear-gradient(135deg, #00e676 0%, #00c853 100%);
    box-shadow: 0 6px 20px rgba(0, 200, 83, 0.5);
}

@keyframes pulse-cta {
    0%, 100% { box-shadow: 0 4px 15px rgba(0, 200, 83, 0.4); }
    50% { box-shadow: 0 4px 25px rgba(0, 200, 83, 0.6); }
}

/* ==================== 章节通用样式 ==================== */
.section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* 子页面顶部标题 */
.page-hero {
    padding: 8rem 0 3rem;
    text-align: center;
    background: linear-gradient(180deg, #0a0f1a 0%, #0d1420 100%);
}

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

/* 交替背景 */
.bg-alt {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0d1420 100%);
}

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

/* ==================== 导航栏样式 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 26, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(10, 15, 26, 0.99);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    color: var(--primary-color);
    font-weight: 900;
}

.nav-menu {
    flex: 1;
    display: flex;
    justify-content: center;
    margin: 0 2rem;
}

.nav-list {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

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

.nav-actions {
    display: flex;
    gap: 0.75rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ==================== Hero 区域样式 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 7rem 0 5rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 102, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse 80% 50% at 50% 50%, black 40%, transparent 100%);
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, rgba(0, 102, 255, 0.3) 0%, transparent 70%);
    filter: blur(60px);
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    animation: badge-pulse 2s infinite;
}

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

.hero-content {
    text-align: center;
    max-width: 900px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

.hero-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-card);
    border-radius: 50px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.hero-feature:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 1.25rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.hero-trust {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.trust-item {
    color: var(--success-color);
    font-weight: 500;
}

.scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    font-size: 1.5rem;
}

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

/* ==================== 服务器节点模块 ==================== */
.server-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.server-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.server-search {
    position: relative;
}

.search-input {
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    color: var(--text-primary);
    font-size: 0.875rem;
    width: 200px;
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    width: 250px;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.875rem;
}

.server-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.server-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.server-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.server-card.popular {
    border-color: var(--warning-color);
    position: relative;
}

.server-card.popular::before {
    content: '🔥';
    position: absolute;
    top: -10px;
    right: -10px;
    font-size: 1.5rem;
}

.server-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.server-flag {
    font-size: 2rem;
}

.server-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.server-location {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.server-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-dot.online {
    background: var(--success-color);
    box-shadow: 0 0 8px var(--success-color);
}

.status-dot.busy {
    background: var(--warning-color);
    box-shadow: 0 0 8px var(--warning-color);
}

.status-dot.offline {
    background: var(--danger-color);
    box-shadow: 0 0 8px var(--danger-color);
}

.server-speed {
    font-size: 0.875rem;
    color: var(--secondary-color);
    margin-left: auto;
}

.server-ping {
    font-size: 0.75rem;
    color: var(--success-color);
    background: rgba(16, 185, 129, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.server-details {
    display: none;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.server-card.expanded .server-details {
    display: block;
}

.server-load {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.load-bar {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    margin-top: 0.25rem;
    overflow: hidden;
}

.load-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width var(--transition-normal);
}

.server-loading {
    display: none;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    color: var(--text-muted);
}

.server-loading.active {
    display: flex;
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ==================== 功能模块 ==================== */
.features {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0d1420 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-fast);
}

.feature-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.feature-card .feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.protocols {
    text-align: center;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.protocols-title {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.protocols-list {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.protocol-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.protocol-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.protocol-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ==================== 价格表表格样式 ==================== */
.pricing-section {
    background: var(--bg-dark);
}

.region-block {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.region-block-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.region-block-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}

.region-block-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.region-flag {
    font-size: 2.5rem;
    line-height: 1;
}

/* 价格表 */
.price-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.price-table thead th {
    padding: 0.75rem 1rem;
    background: var(--bg-card-hover);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border-color);
}

.price-table thead tr th:first-child {
    border-radius: 8px 0 0 8px;
}

.price-table thead tr th:last-child {
    border-radius: 0 8px 8px 0;
    text-align: center;
}

.price-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9375rem;
}

.price-table tr:last-child td {
    border-bottom: none;
}

.price-table tr:hover td {
    background: rgba(0, 102, 255, 0.04);
}

.row-recommend {
    background: rgba(0, 102, 255, 0.06);
}

.row-recommend:hover td {
    background: rgba(0, 102, 255, 0.1) !important;
}

.band-tag {
    font-weight: 600;
    color: var(--text-primary);
}

.price-highlight {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary-color);
}

.rec-badge {
    display: inline-block;
    font-size: 0.7rem;
    background: var(--success-color);
    color: white;
    padding: 0.125rem 0.5rem;
    border-radius: 8px;
    font-weight: 600;
    margin-left: 0.5rem;
    vertical-align: middle;
}

.price-table td:last-child {
    text-align: center;
}

.china-block {
    background: linear-gradient(180deg, var(--bg-card) 0%, rgba(239, 68, 68, 0.05) 100%);
    border-color: rgba(239, 68, 68, 0.3);
}

.custom-block {
    background: var(--bg-card);
}

.china-note {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    color: var(--text-muted);
}

/* 信任标识 */
.pricing-trust {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-card-hover);
    border-radius: 8px;
}

.trust-icon {
    font-size: 1.25rem;
}

/* 首页预览表格 */
.pricing-preview {
    background: var(--bg-dark);
}

.preview-table {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.preview-row {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    gap: 1rem;
}

.preview-row:last-child {
    border-bottom: none;
}

.preview-row span:first-child {
    flex: 0 0 160px;
    font-weight: 600;
}

.preview-row span:nth-child(2) {
    flex: 1;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.preview-header-row {
    background: var(--bg-card-hover);
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.preview-price {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary-color);
    flex: 0 0 80px;
    text-align: center;
}

/* 首页快速入口 */
.quick-entry {
    background: var(--bg-dark);
}

.entry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.entry-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    position: relative;
}

.entry-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

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

.entry-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.entry-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.entry-arrow {
    position: absolute;
    right: 1.5rem;
    bottom: 1.5rem;
    font-size: 1.25rem;
    color: var(--primary-color);
    opacity: 0;
    transition: all var(--transition-fast);
}

.entry-card:hover .entry-arrow {
    opacity: 1;
}

/* Logo 图片样式 */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
}

.logo-img {
    height: 36px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    color: var(--text-primary);
}

/* 页脚 Logo */
.footer-logo-img {
    height: 36px;
    width: auto;
    object-fit: contain;
    margin-right: 0.25rem;
}

/* ==================== 用户评价模块 ==================== */
.reviews {
    background: linear-gradient(180deg, #0d1420 0%, var(--bg-dark) 100%);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.review-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all var(--transition-fast);
}

.review-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.review-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.review-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: rgba(0, 102, 255, 0.1);
    border: 1px solid rgba(0, 102, 255, 0.3);
    border-radius: 4px;
    color: var(--primary-light);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.review-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-card-hover);
}

.review-info {
    display: flex;
    flex-direction: column;
}

.review-name {
    font-weight: 600;
}

.review-location {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.review-text {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.review-rating {
    color: #fbbf24;
    font-size: 1.125rem;
    letter-spacing: 2px;
}

.certifications {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.cert-icon {
    font-size: 1.5rem;
}

.cert-text {
    font-weight: 500;
}

/* ==================== FAQ 模块 ==================== */
.faq {
    background: var(--bg-dark);
}

.faq-controls {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.faq-search {
    position: relative;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all var(--transition-fast);
}

.faq-item:hover {
    border-color: var(--primary-color);
}

.faq-item.hidden {
    display: none;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    background: var(--bg-card);
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-card-hover);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 1.25rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==================== 支付模块 ==================== */
.payment {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0d1420 100%);
}

.payment-content {
    text-align: center;
    padding: 3rem;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.payment-title {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.payment-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.payment-methods {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.payment-method {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem 2rem;
    background: var(--bg-card-hover);
    border-radius: 12px;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.payment-method:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--primary-color);
}

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

.payment-name {
    font-weight: 500;
}

.refund-policy {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success-color);
    border-radius: 50px;
    color: var(--success-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.refund-icon {
    font-size: 1.25rem;
}

.payment-security {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ==================== 模态框样式 ==================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

.modal-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.modal-tab {
    flex: 1;
    padding: 0.75rem;
    background: none;
    border: none;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-tab.active {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.auth-form.hidden {
    display: none;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.2);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-group input.error {
    border-color: var(--danger-color);
}

.form-error {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

.password-strength {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.strength-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ==================== 弹窗样式 ==================== */
.popup-modal {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
}

.popup-modal.active {
    display: flex;
}

.popup-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.popup-content {
    position: relative;
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2.5rem;
    width: 90%;
    max-width: 450px;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.popup-animate {
    animation: popupIn 0.3s ease;
}

@keyframes popupIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.popup-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.popup-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.popup-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.popup-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.popup-text strong {
    color: var(--danger-color);
    font-size: 1.5rem;
}

.contact-qq-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #e8f4fd, #f0f7ff);
    border: 1px solid #b3d9ff;
    border-radius: 0.75rem;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
}

.contact-qq-box .qq-icon {
    font-size: 1.5rem;
}

.contact-qq-box .qq-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

.contact-qq-box .qq-number {
    font-size: 1.3rem;
    font-weight: 700;
    color: #1a73e8;
    letter-spacing: 0.05em;
}

.popup-subtext {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.popup-cta {
    display: block;
    margin-bottom: 1rem;
}

.popup-remind {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    cursor: pointer;
    text-decoration: underline;
}

.popup-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.popup-success .popup-icon {
    color: var(--success-color);
    font-size: 5rem;
}

/* ==================== 客服聊天弹窗 ==================== */
.chat-modal {
    position: fixed;
    bottom: 100px;
    right: 2rem;
    z-index: 1500;
    width: 350px;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    display: none;
    flex-direction: column;
    overflow: hidden;
}

.chat-modal.active {
    display: flex;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-card-hover);
    border-bottom: 1px solid var(--border-color);
}

.chat-title {
    font-weight: 600;
    flex: 1;
}

.chat-status {
    font-size: 0.75rem;
}

.chat-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
}

.chat-body {
    flex: 1;
    padding: 1rem;
    max-height: 300px;
    overflow-y: auto;
}

.chat-message {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.chat-message.user {
    flex-direction: row-reverse;
}

.chat-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-card-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.chat-bubble {
    max-width: 70%;
    padding: 0.75rem 1rem;
    background: var(--bg-card-hover);
    border-radius: 12px;
    border-top-left-radius: 4px;
}

.chat-message.user .chat-bubble {
    background: var(--primary-color);
    border-radius: 12px;
    border-top-right-radius: 4px;
}

.chat-bubble p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
}

.quick-replies {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.quick-reply {
    padding: 0.375rem 0.75rem;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-primary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quick-reply:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
}

.chat-input-area {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.chat-input {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.chat-send {
    padding: 0.75rem 1rem;
    background: var(--primary-color);
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chat-send:hover {
    background: var(--primary-dark);
}

/* ==================== 页面弹窗 ==================== */
.page-overlay {
    position: fixed;
    inset: 0;
    z-index: 2500;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.page-overlay.active {
    display: flex;
}

.page-content {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.page-header h2 {
    font-size: 1.5rem;
}

.page-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.orders-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.order-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-card-hover);
    border-radius: 8px;
}

.order-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.order-plan {
    font-weight: 600;
}

.order-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.order-status {
    padding: 0.25rem 0.75rem;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.order-actions {
    display: flex;
    gap: 0.5rem;
}

.page-empty {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

/* ==================== 页脚样式 ==================== */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-logo .logo-img {
    height: 36px;
    width: auto;
}

.footer-desc {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-card-hover);
    border-radius: 8px;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-links li:not(a) {
    color: var(--text-muted);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-legal {
    display: flex;
    gap: 1.5rem;
}

.footer-legal a {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-legal a:hover {
    color: var(--primary-color);
}

.copyright {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ==================== 悬浮客服按钮 ==================== */
.floating-support {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
}

.support-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--gradient-primary);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-lg), 0 0 20px rgba(0, 102, 255, 0.4);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: support-pulse 2s infinite;
}

@keyframes support-pulse {
    0%, 100% { box-shadow: var(--shadow-lg), 0 0 20px rgba(0, 102, 255, 0.4); }
    50% { box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 102, 255, 0.6); }
}

.support-btn:hover {
    transform: scale(1.1);
}

.support-icon {
    font-size: 1.75rem;
}

.support-tooltip {
    position: absolute;
    right: 70px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-card);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    border: 1px solid var(--border-color);
}

.floating-support:hover .support-tooltip {
    opacity: 1;
}

/* ==================== 返回顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 1000;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.back-to-top:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* ==================== 通知提示 ==================== */
.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 3000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    animation: slideIn 0.3s ease;
}

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

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

.notification-info {
    background: var(--primary-color);
}

/* ==================== 响应式布局 ==================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 2rem;
        margin: 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        border-bottom: 1px solid var(--border-color);
    }

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

    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }

    .nav-actions {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 6rem 0 3rem;
        min-height: auto;
    }

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

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

    .hero-badge {
        font-size: 0.75rem;
    }

    .hero-features {
        gap: 0.75rem;
    }

    .hero-feature {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .hero-actions {
        flex-direction: column;
        gap: 0.75rem;
    }

    .hero-trust {
        flex-direction: column;
        gap: 0.75rem;
    }

    .section {
        padding: 3rem 0;
    }

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

    .server-controls {
        flex-direction: column;
    }

    .server-search {
        width: 100%;
    }

    .search-input {
        width: 100%;
    }

    .search-input:focus {
        width: 100%;
    }

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

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

    .preview-row span:first-child {
        flex: 0 0 120px;
        font-size: 0.875rem;
    }

    .region-block {
        padding: 1.25rem;
    }

    .price-table {
        font-size: 0.8125rem;
    }

    .price-table td, .price-table th {
        padding: 0.5rem 0.5rem;
    }

    .price-highlight {
        font-size: 1rem;
    }

    .protocols-list {
        gap: 1.5rem;
    }

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

    .certifications {
        flex-direction: column;
        gap: 1rem;
    }

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

    .social-links {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .back-to-top {
        left: 1rem;
        bottom: 1rem;
        width: 40px;
        height: 40px;
    }

    .floating-support {
        right: 1rem;
        bottom: 1rem;
    }

    .support-btn {
        width: 48px;
        height: 48px;
    }

    .support-icon {
        font-size: 1.5rem;
    }

    .chat-modal {
        right: 1rem;
        left: 1rem;
        width: auto;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: 0 1rem;
    }

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

    .hero-features {
        flex-direction: column;
        align-items: center;
    }

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

    .payment-methods {
        gap: 1rem;
    }

    .payment-method {
        padding: 1rem 1.5rem;
    }

    .modal-content {
        margin: 1rem;
        padding: 1.5rem;
    }

    .popup-content {
        padding: 1.5rem;
    }
}

/* ==================== 动画效果 ==================== */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

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

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

.server-card .status-dot.online {
    animation: pulse 2s infinite;
}

/* ==================== 辅助类 ==================== */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ==================== 懒加载样式 ==================== */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img[loading="lazy"].loaded,
img[loading="lazy"]:not([src]) {
    opacity: 1;
}

/* ==================== 购物车样式 ==================== */
.cart-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.cart-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #ef4444;
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

.cart-modal-content {
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

.cart-body {
    margin: 1.5rem 0;
}

.cart-items {
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: 1rem;
}

.cart-empty {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.cart-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 0.75rem;
    background: var(--bg-card);
    transition: all var(--transition-fast);
}

.cart-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.cart-item-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.cart-item-flag {
    font-size: 2rem;
}

.cart-item-details h4 {
    margin: 0;
    font-size: 1rem;
    color: var(--text-primary);
}

.cart-item-details p {
    margin: 0.25rem 0 0;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.cart-item-price {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

.cart-item-unit-price {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.qty-btn {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
    font-weight: 600;
}

.qty-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.qty-value {
    min-width: 30px;
    text-align: center;
    font-weight: 600;
}

.cart-item-total {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-color);
}

.cart-item-remove {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color var(--transition-fast);
}

.cart-item-remove:hover {
    color: #ef4444;
}

.cart-summary {
    border-top: 2px solid var(--border-color);
    padding-top: 1rem;
}

.cart-total-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    font-size: 1rem;
}

.cart-total-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.cart-footer {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* ==================== 结算模态框样式 ==================== */
.checkout-modal-content {
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
}

.checkout-body {
    margin: 1.5rem 0;
}

.checkout-section {
    margin-bottom: 2rem;
}

.checkout-section h3 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.checkout-items {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.checkout-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: 6px;
}

.checkout-item-flag {
    font-size: 1.5rem;
}

.checkout-item-info {
    flex: 1;
}

.checkout-item-name {
    font-weight: 500;
}

.checkout-item-qty {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-left: 0.5rem;
}

.checkout-item-price {
    font-weight: 700;
    color: var(--primary-color);
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.payment-option {
    cursor: pointer;
}

.payment-option input[type="radio"] {
    display: none;
}

.payment-option-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: all var(--transition-fast);
    background: var(--bg-card);
}

.payment-option input[type="radio"]:checked + .payment-option-content {
    border-color: var(--primary-color);
    background: rgba(0, 102, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.2);
}

.payment-icon {
    font-size: 2rem;
}

.payment-name {
    font-weight: 500;
}

.contact-form {
    display: grid;
    gap: 1rem;
}

.contact-form .form-group {
    margin-bottom: 0;
}

.contact-form textarea {
    width: 100%;
    min-height: 80px;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-card);
    color: var(--text-primary);
    resize: vertical;
}

.checkout-summary {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}

.summary-total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    border-top: 1px solid var(--border-color);
    margin-top: 0.5rem;
    padding-top: 1rem;
}

.checkout-footer {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

/* ==================== 支付模态框样式 ==================== */
.payment-modal-content {
    max-width: 500px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.payment-body {
    margin: 1.5rem 0;
    overflow-y: auto;
    flex: 1;
}

.payment-order-info {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.payment-order-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.payment-order-id {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.payment-order-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.payment-order-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.payment-order-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
}

.payment-method-selected {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.payment-qrcode {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

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

.qrcode-icon {
    font-size: 4rem;
}

.payment-timer {
    text-align: center;
    padding: 0.75rem;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 6px;
    margin-bottom: 1rem;
    font-weight: 500;
    font-size: 0.875rem;
}

#payment-countdown {
    color: #ef4444;
    font-weight: 700;
    font-size: 1.125rem;
}

.payment-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
    background: var(--bg-card);
    padding-bottom: 0;
}

.payment-actions .btn {
    min-width: 120px;
}

/* ==================== 订单页面样式 ==================== */
.orders-page {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.orders-page.active {
    display: flex;
}

.orders-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.orders-content {
    position: relative;
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    max-width: 800px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.orders-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

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

.orders-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.orders-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.orders-empty {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.order-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
}

.order-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.order-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.order-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.order-id {
    font-weight: 600;
    color: var(--text-primary);
}

.order-date {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.order-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
}

.order-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.order-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem;
    background: var(--bg-card);
    border-radius: 4px;
    font-size: 0.875rem;
}

.order-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.order-total {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.order-total-amount {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.order-actions {
    display: flex;
    gap: 0.5rem;
}

/* ==================== 支付成功弹窗样式 ==================== */
#payment-success-popup .popup-icon {
    font-size: 4rem;
    animation: float 2s ease-in-out infinite;
}

#payment-success-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

/* ==================== 响应式调整 ==================== */
@media (max-width: 768px) {
    .cart-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .cart-item-price {
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .payment-methods {
        grid-template-columns: 1fr;
    }
    
    .checkout-footer,
    .cart-footer {
        flex-direction: column;
    }
    
    .checkout-footer .btn,
    .cart-footer .btn {
        width: 100%;
    }
    
    .order-footer {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .order-actions {
        width: 100%;
    }
    
    .order-actions .btn {
        flex: 1;
    }
}

/* ==================== USDT支付样式 ==================== */
.usdt-payment-info {
    margin-top: 1.5rem;
    padding: 1rem;
    background: linear-gradient(135deg, rgba(38, 161, 123, 0.1) 0%, rgba(0, 102, 255, 0.1) 100%);
    border-radius: 8px;
    border: 1px solid rgba(38, 161, 123, 0.3);
}

.usdt-warning {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 6px;
    margin-bottom: 1rem;
    border-left: 3px solid #f59e0b;
}

.warning-icon {
    font-size: 1.5rem;
}

.usdt-warning p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
}

.usdt-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.usdt-detail-row {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.usdt-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.usdt-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.usdt-amount {
    font-size: 1.25rem;
    color: #26a17b;
    font-weight: 700;
}

.usdt-address-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.usdt-address {
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    background: var(--bg-secondary);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    word-break: break-all;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.copy-address-btn {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.copy-address-btn:hover {
    background: #0052cc;
    transform: translateY(-1px);
}

.usdt-qr-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.usdt-qr-code {
    width: 200px;
    height: 200px;
    background: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.usdt-qr-code .qr-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.usdt-qr-code .qr-icon {
    font-size: 4rem;
    color: #26a17b;
}

.usdt-qr-code p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.usdt-transfer-info {
    text-align: center;
    width: 100%;
}

.transfer-amount {
    font-size: 1.125rem;
    margin: 0.5rem 0;
}

.transfer-amount strong {
    color: #26a17b;
    font-size: 1.5rem;
}

.transfer-network {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0.25rem 0;
}

.transfer-note {
    font-size: 0.75rem;
    color: #f59e0b;
    margin: 0.5rem 0 0;
    font-weight: 500;
}

/* USDT支付选项样式 */
.payment-option input[type="radio"]:checked + .payment-option-content:has(.payment-icon:contains('₮')) {
    border-color: #26a17b;
    background: rgba(38, 161, 123, 0.1);
    box-shadow: 0 0 0 3px rgba(38, 161, 123, 0.2);
}

.payment-icon {
    font-size: 2rem;
}

/* USDT图标特殊样式 */
.payment-option:has(input[value="usdt"]) .payment-icon {
    color: #26a17b;
    font-weight: 700;
}

@media (max-width: 768px) {
    .usdt-address-wrapper {
        flex-direction: column;
        align-items: stretch;
    }
    
    .usdt-address {
        font-size: 0.75rem;
    }
    
    .copy-address-btn {
        width: 100%;
        text-align: center;
    }
    
    .usdt-qr-code {
        width: 180px;
        height: 180px;
    }
}

/* ==================== 收款码显示样式 ==================== */
.qrcode-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.qrcode-image-wrapper {
    width: 260px;
    height: 260px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.qrcode-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.payment-remark-section {
    width: 100%;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.05) 0%, rgba(38, 161, 123, 0.05) 100%);
    border-radius: 8px;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
}

.remark-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.remark-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.remark-required {
    font-size: 0.875rem;
    color: #ef4444;
    font-weight: 500;
}

.remark-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-card);
    padding: 1rem;
    border-radius: 6px;
    border: 2px dashed var(--primary-color);
    margin-bottom: 0.75rem;
}

.remark-value {
    font-family: 'Courier New', monospace;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 2px;
    flex: 1;
}

.copy-remark-btn {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.copy-remark-btn:hover {
    background: #0052cc;
    transform: translateY(-1px);
}

.remark-tip {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .qrcode-image-wrapper {
        width: 240px;
        height: 240px;
    }
    
    .remark-content {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    
    .remark-value {
        text-align: center;
        font-size: 1.125rem;
    }
    
    .copy-remark-btn {
        width: 100%;
        text-align: center;
    }
    
    .payment-actions {
        flex-direction: column;
    }
    
    .payment-actions .btn {
        width: 100%;
    }
}

/* ==================== 用户个人中心样式 ==================== */
.user-center-page {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.user-center-page.active {
    display: flex;
}

.user-center-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.user-center-content {
    position: relative;
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    max-width: 900px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.user-center-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.user-center-close:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.user-center-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.user-center-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.user-info-section {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: var(--shadow-md);
}

.user-details {
    flex: 1;
}

.user-details h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.user-details p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.user-center-body {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.user-tabs {
    display: flex;
    gap: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.user-tab {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

.user-tab:hover {
    color: var(--text-primary);
}

.user-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.user-tab-content {
    min-height: 300px;
}

.user-tab-panel {
    display: none;
}

.user-tab-panel.active {
    display: block;
}

/* 购买的商品列表样式 */
.purchases-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.purchase-card {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.05) 0%, rgba(0, 212, 255, 0.05) 100%);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
    transition: all var(--transition-fast);
}

.purchase-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.2);
}

.purchase-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.purchase-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.purchase-flag {
    font-size: 1.5rem;
}

.purchase-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.purchase-bandwidth {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.purchase-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
}

.purchase-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
}

.purchase-detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.purchase-detail-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 500;
}

.purchase-detail-value {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
}

.purchase-empty,
.orders-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.purchase-empty p,
.orders-empty p {
    font-size: 1rem;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .user-center-content {
        padding: 1.5rem;
        max-height: 90vh;
    }

    .user-info-section {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .user-tabs {
        overflow-x: auto;
        white-space: nowrap;
    }

    .purchase-details {
        grid-template-columns: 1fr;
    }

    .purchase-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}