/* ========================================
   三角洲护航陪玩 - 专业服务型风格
   冷静、理性、可信
   ======================================== */

/* CSS 变量定义 */
:root {
    /* 深灰背景系 */
    --color-bg-primary: #1a1d23;
    --color-bg-secondary: #21252d;
    --color-bg-tertiary: #282d37;
    --color-bg-card: #2a2f3a;
    --color-bg-hover: #323844;
    
    /* 蓝色强调 */
    --color-primary: #3b82f6;
    --color-primary-light: #60a5fa;
    --color-primary-dark: #2563eb;
    --color-primary-bg: rgba(59, 130, 246, 0.1);
    --color-primary-border: rgba(59, 130, 246, 0.3);
    
    /* 辅助色 */
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #06b6d4;
    
    /* 文字颜色 */
    --color-text-primary: #e5e7eb;
    --color-text-secondary: #9ca3af;
    --color-text-muted: #6b7280;
    
    /* 边框 */
    --color-border: #374151;
    --color-border-light: #4b5563;
    
    /* 字体 */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Microsoft YaHei", "PingFang SC", sans-serif;
    --font-size-base: 16px;
    --line-height: 1.7;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    /* 容器 */
    --container-width: 1200px;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary);
    line-height: var(--line-height);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--color-primary);
    color: white;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-light);
}

/* ========================================
   通用样式
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-light);
}

ul {
    list-style: none;
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-submit {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
}

/* ========================================
   导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 29, 35, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 1.1rem;
}

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

.logo-icon {
    color: var(--color-primary);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 0.25rem;
}

.nav-link {
    display: block;
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

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

.btn-contact {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
    background: var(--color-primary);
    border-radius: var(--radius-md);
}

.btn-contact:hover {
    background: var(--color-primary-dark);
    color: white;
}

/* ========================================
   Hero 首屏
   ======================================== */
.hero {
    padding: calc(70px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    border-bottom: 1px solid var(--color-border);
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    letter-spacing: 2px;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.9;
    margin-bottom: var(--spacing-lg);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.stat-item {
    text-align: left;
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

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

/* ========================================
   通用区块样式
   ======================================== */
.section {
    padding: var(--spacing-2xl) 0;
}

.section-alt {
    background: var(--color-bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.section-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.section-action {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ========================================
   陪玩流程
   ======================================== */
.process-steps {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.process-line {
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.step {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    color: white;
    background: var(--color-primary);
    border-radius: 50%;
    position: relative;
    z-index: 1;
}

.step-content {
    flex: 1;
    background: var(--color-bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.step-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.step-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.step-details {
    list-style: none;
}

.step-details li {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    padding-left: 1rem;
    position: relative;
    margin-bottom: 0.25rem;
}

.step-details li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* ========================================
   陪玩项目
   ======================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
}

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

.service-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.service-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.service-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.service-features {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.service-features li {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    padding: 0.25rem 0;
    padding-left: 1.25rem;
    position: relative;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-size: 0.75rem;
}

.service-price {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.price-from {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.price-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* ========================================
   服务价格表
   ======================================== */
.pricing-table {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

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

.pricing-table th,
.pricing-table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.pricing-table th {
    background: var(--color-bg-tertiary);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-table td {
    font-size: 0.95rem;
}

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

.pricing-table tr:hover td {
    background: var(--color-bg-hover);
}

.pricing-table tr.featured td {
    background: var(--color-primary-bg);
}

.level-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.level-1 {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

.level-2 {
    background: rgba(34, 197, 94, 0.15);
    color: var(--color-success);
}

.level-3 {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

.level-4 {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-warning);
}

.btn-table {
    display: inline-block;
    padding: 0.35rem 1rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

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

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

.btn-table.primary:hover {
    background: var(--color-primary-dark);
}

.pricing-notes {
    background: var(--color-bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.pricing-notes h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.pricing-notes ul {
    list-style: none;
}

.pricing-notes li {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding: 0.35rem 0;
    padding-left: 1.25rem;
    position: relative;
}

.pricing-notes li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* ========================================
   护航优势
   ======================================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.advantage-item {
    display: flex;
    gap: var(--spacing-md);
    background: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.advantage-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--color-primary-bg);
    border-radius: var(--radius-md);
}

.advantage-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.advantage-content p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.advantage-content ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.advantage-content li {
    font-size: 0.8rem;
    color: var(--color-primary);
    background: var(--color-primary-bg);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

/* ========================================
   游戏攻略
   ======================================== */
.guides-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.guide-card {
    background: var(--color-bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
}

.guide-card:hover {
    border-color: var(--color-primary-border);
}

.guide-card.featured {
    grid-column: span 3;
    display: grid;
    grid-template-columns: 1fr;
    padding: var(--spacing-lg);
}

.guide-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-bg);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.guide-title {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: var(--spacing-xs);
}

.guide-card.featured .guide-title {
    font-size: 1.25rem;
}

.guide-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.guide-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.guide-link {
    font-size: 0.875rem;
    font-weight: 500;
}

/* ========================================
   常见问题
   ======================================== */
.faq-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.faq-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.faq-item {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.faq-question {
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: 2.5rem;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    color: var(--color-text-muted);
    transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
    content: '−';
}

.faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.faq-answer p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.faq-answer ul {
    list-style: none;
}

.faq-answer li {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding: 0.25rem 0;
    padding-left: 1.25rem;
    position: relative;
}

.faq-answer li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* ========================================
   资讯动态
   ======================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.news-card {
    background: var(--color-bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
}

.news-card:hover {
    border-color: var(--color-primary-border);
}

.news-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.news-tag.announcement {
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-danger);
}

.news-tag.game {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

.news-tag.event {
    background: rgba(34, 197, 94, 0.15);
    color: var(--color-success);
}

.news-tag.recruit {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-warning);
}

.news-title {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: var(--spacing-xs);
}

.news-excerpt {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}

.meta-date {
    color: var(--color-text-muted);
}

.news-link {
    font-weight: 500;
}

/* ========================================
   联系咨询
   ======================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.contact-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

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

.method-info h4 {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.1rem;
}

.method-info p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.contact-form {
    background: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.form-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

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

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%239ca3af" stroke-width="2"><polyline points="6,9 12,15 18,9"/></svg>');
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-sm);
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-column h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.footer-column li {
    margin-bottom: 0.5rem;
}

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

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

.footer-bottom {
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .guides-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .guide-card.featured {
        grid-column: span 2;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .stat-item {
        flex: 1 1 40%;
    }
    
    .services-grid,
    .guides-grid,
    .news-grid,
    .faq-container {
        grid-template-columns: 1fr;
    }
    
    .guide-card.featured {
        grid-column: span 1;
    }
    
    .pricing-table {
        overflow-x: auto;
    }
    
    .pricing-table table {
        min-width: 600px;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}