/* ========================================
   三角洲精英陪练俱乐部 - 高端品牌风格
   深色背景 + 金色/银色点缀
   ======================================== */

/* CSS 变量定义 */
:root {
    /* 深色背景 */
    --color-bg: #0c0c0e;
    --color-bg-alt: #111114;
    --color-bg-card: #16161a;
    --color-bg-elevated: #1a1a1f;
    
    /* 金色点缀 */
    --color-gold: #c9a962;
    --color-gold-light: #dfc88a;
    --color-gold-dark: #a68b4b;
    
    /* 银色点缀 */
    --color-silver: #9ca3af;
    --color-silver-light: #d1d5db;
    
    /* 文字颜色 */
    --color-text: #e8e8ec;
    --color-text-secondary: #9898a0;
    --color-text-muted: #606068;
    
    /* 边框 */
    --color-border: #28282e;
    --color-border-light: #38383f;
    
    /* 字体 */
    --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    --font-display: "Noto Serif SC", Georgia, "Times New Roman", serif;
    --font-size: 16px;
    --line-height: 1.8;
    
    /* 间距 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;
    
    /* 容器 */
    --container: 1140px;
    --container-narrow: 800px;
}

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

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

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

::selection {
    background: var(--color-gold);
    color: var(--color-bg);
}

::-webkit-scrollbar {
    width: 6px;
}

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

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

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

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

.container-narrow {
    max-width: var(--container-narrow);
}

a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-gold);
}

ul {
    list-style: none;
}

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: var(--color-gold-light);
    color: var(--color-bg);
}

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

.btn-outline:hover {
    border-color: var(--color-gold);
    color: var(--color-gold);
}

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

/* ========================================
   导航
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(12, 12, 14, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

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

.logo-mark {
    color: var(--color-gold);
    font-size: 1.25rem;
}

.logo-text {
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 1px;
}

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

.nav-menu a {
    display: block;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.3px;
}

.nav-menu a:hover {
    color: var(--color-text);
}

.nav-cta {
    padding: 0.5rem 1.25rem;
    font-size: 0.8rem;
    color: var(--color-gold);
    border: 1px solid var(--color-gold-dark);
    letter-spacing: 0.5px;
}

.nav-cta:hover {
    background: var(--color-gold);
    color: var(--color-bg);
}

/* ========================================
   Hero
   ======================================== */
.hero {
    position: relative;
    padding: calc(72px + var(--space-3xl)) 0 var(--space-3xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 640px;
}

.hero-label {
    font-size: 0.75rem;
    color: var(--color-gold);
    letter-spacing: 3px;
    margin-bottom: var(--space-md);
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: 2px;
    margin-bottom: var(--space-lg);
}

.hero-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 2;
    margin-bottom: var(--space-xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-sm);
}

.hero-decoration {
    position: absolute;
    top: 50%;
    right: 10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(201, 169, 98, 0.03) 0%, transparent 70%);
    transform: translateY(-50%);
    pointer-events: none;
}

/* ========================================
   通用区块
   ======================================== */
.section {
    padding: var(--space-3xl) 0;
}

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

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

.section-label {
    display: inline-block;
    font-size: 0.7rem;
    color: var(--color-gold);
    letter-spacing: 3px;
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 500;
    letter-spacing: 2px;
    margin-bottom: var(--space-sm);
}

.section-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

/* ========================================
   俱乐部介绍
   ======================================== */
.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.about-lead {
    font-size: 1.1rem;
    line-height: 2;
    margin-bottom: var(--space-md);
}

.about-main p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 2;
    margin-bottom: var(--space-sm);
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
}

.stat {
    text-align: center;
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.stat:last-child {
    border-bottom: none;
}

.stat-value {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 500;
    color: var(--color-gold);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-value sup {
    font-size: 0.5em;
    color: var(--color-gold-light);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    letter-spacing: 1px;
}

/* ========================================
   服务方案
   ======================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.service-card {
    position: relative;
    background: var(--color-bg-card);
    padding: var(--space-lg);
    border: 1px solid var(--color-border);
    transition: border-color 0.3s ease;
}

.service-card:hover {
    border-color: var(--color-border-light);
}

.service-card.featured {
    border-color: var(--color-gold-dark);
}

.card-badge {
    position: absolute;
    top: 0;
    right: var(--space-md);
    padding: 0.35rem 0.75rem;
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--color-bg);
    background: var(--color-gold);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.card-icon {
    color: var(--color-gold);
    font-size: 1.25rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.card-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.9;
    margin-bottom: var(--space-md);
}

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

.card-features li {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    padding: 0.4rem 0;
    padding-left: 1.25rem;
    position: relative;
}

.card-features li::before {
    content: '·';
    position: absolute;
    left: 0;
    color: var(--color-gold);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-price {
    font-size: 0.9rem;
    color: var(--color-silver-light);
}

/* ========================================
   定价体系
   ======================================== */
.pricing-content {
    max-width: 900px;
    margin: 0 auto;
}

.pricing-table {
    margin-bottom: var(--space-lg);
    border: 1px solid var(--color-border);
}

.pricing-row {
    display: grid;
    grid-template-columns: 1.2fr 1.5fr 1fr 1fr;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}

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

.pricing-header {
    background: var(--color-bg-card);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.pricing-row.featured {
    background: rgba(201, 169, 98, 0.05);
}

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

.level-dot {
    width: 8px;
    height: 8px;
    background: var(--color-silver);
    border-radius: 50%;
}

.level-dot.gold {
    background: var(--color-gold);
}

.level-dot.diamond {
    background: #60a5fa;
}

.level-dot.platinum {
    background: #a78bfa;
}

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

.pricing-notes h4 {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

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

.pricing-notes li {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    padding: 0.35rem 0;
    padding-left: 1rem;
    position: relative;
}

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

/* ========================================
   合作流程
   ======================================== */
.process-timeline {
    max-width: 700px;
    margin: 0 auto;
}

.process-step {
    display: flex;
    gap: var(--space-lg);
    padding-bottom: var(--space-lg);
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.process-step:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-gold);
    line-height: 1;
}

.step-content h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.step-content p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ========================================
   护航体系
   ======================================== */
.escort-intro {
    max-width: 700px;
    margin: 0 auto var(--space-xl);
    text-align: center;
}

.escort-intro p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 2;
}

.escort-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.escort-item {
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
}

.escort-item h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.escort-item p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ========================================
   战术教学
   ======================================== */
.teaching-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.teaching-card {
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    transition: border-color 0.3s ease;
}

.teaching-card:hover {
    border-color: var(--color-border-light);
}

.teaching-category {
    display: inline-block;
    font-size: 0.7rem;
    color: var(--color-gold);
    letter-spacing: 1px;
    margin-bottom: var(--space-sm);
}

.teaching-card h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.teaching-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ========================================
   玩家须知
   ======================================== */
.notice-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.notice-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.notice-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
}

.notice-item summary {
    display: block;
    padding: var(--space-md);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: 2.5rem;
}

.notice-item summary::-webkit-details-marker {
    display: none;
}

.notice-item summary::after {
    content: '+';
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--color-text-muted);
}

.notice-item[open] summary::after {
    content: '−';
}

.notice-answer {
    padding: 0 var(--space-md) var(--space-md);
}

.notice-answer p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.9;
}

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

.news-card {
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    transition: border-color 0.3s ease;
}

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

.news-tag {
    display: inline-block;
    font-size: 0.7rem;
    color: var(--color-gold);
    letter-spacing: 1px;
    margin-bottom: var(--space-sm);
}

.news-card h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.news-card > p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.news-meta a {
    color: var(--color-text-secondary);
}

.news-meta a:hover {
    color: var(--color-gold);
}

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

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.contact-item {
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
}

.contact-item h4 {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

.contact-item p {
    font-size: 0.95rem;
}

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

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

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

.form-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--color-text);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    transition: border-color 0.3s ease;
}

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

.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="%23606068" 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;
}

/* ========================================
   免责声明
   ======================================== */
.section-disclaimer {
    padding: var(--space-xl) 0;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.section-disclaimer h3 {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

.disclaimer-content {
    max-width: 900px;
}

.disclaimer-content p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    line-height: 2;
    margin-bottom: var(--space-xs);
}

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

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

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

.footer-brand > p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

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

.footer-column h4 {
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
}

.footer-column li {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: var(--color-text-muted);
}

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

.footer-bottom {
    padding-top: var(--space-lg);
}

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

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
    }
    
    .services-grid,
    .escort-grid,
    .teaching-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.25rem;
    }
    
    .pricing-row {
        grid-template-columns: 1fr;
        gap: var(--space-xs);
        text-align: center;
    }
    
    .pricing-header {
        display: none;
    }
    
    .level {
        justify-content: center;
    }
    
    .notice-content,
    .news-grid,
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}