/* ==========================================
   三角洲行动辅助 - 独特暗黑风格（包含所有内页样式）
   设计理念：地下军火库 × 黑客基地 × 重金属美学
   ========================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 暗黑色系 */
    --pure-black: #000000;
    --deep-black: #0d0d0d;
    --dark-gray: #1a1a1a;
    --medium-gray: #2a2a2a;
    --light-gray: #3a3a3a;
    
    /* 血红色系 */
    --blood-red: #8b0000;
    --crimson: #dc143c;
    --dark-red: #660000;
    
    /* 深紫/暗紫 */
    --dark-purple: #2d1b3d;
    --deep-purple: #4a0e4e;
    
    /* 暗金/铁锈色 */
    --dark-gold: #8b7355;
    --rust: #b7410e;
    
    /* 文字颜色 */
    --text-primary: #e8e8e8;
    --text-secondary: #a8a8a8;
    --text-dim: #6a6a6a;
    
    /* 危险提示色 */
    --warning: #ff4444;
    --danger: #cc0000;
}

/* ==========================================
   全局样式 - 纯黑暗风格
   ========================================== */
body {
    font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
    background: var(--pure-black);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    padding-top: 80px;
}

/* 移除所有固定背景纹理 - 保持纯净的暗黑风格 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.01) 2px,
            rgba(255, 255, 255, 0.01) 4px
        );
    pointer-events: none;
    z-index: 1;
    opacity: 0.3;
}

/* 血迹纹理已移除 - 保持纯净背景 */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    position: relative;
    z-index: 2;
}

/* ==========================================
   导航栏 - 军事HUD风格
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    padding: 0;
    z-index: 1000;
    /* 移除固定红线边框 */
    box-shadow: 0 5px 30px rgba(139, 0, 0, 0.5);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 24px;
    font-weight: 900;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    position: relative;
    text-decoration: none;
}

.logo::before {
    content: '';
    position: absolute;
    left: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 40px;
    background: var(--blood-red);
}

.logo-icon {
    font-size: 36px;
    color: var(--crimson);
    filter: drop-shadow(0 0 10px var(--blood-red));
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.logo-text {
    color: var(--text-primary);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    padding: 15px 25px;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
    position: relative;
    clip-path: polygon(10% 0%, 100% 0%, 90% 100%, 0% 100%);
    background: var(--deep-black);
    margin-right: 5px;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--crimson);
    transition: width 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--crimson);
    background: var(--dark-gray);
}

.nav-menu a:hover::before,
.nav-menu a.active::before {
    width: 100%;
}

.nav-buttons {
    display: flex;
    gap: 10px;
}

/* 移动端菜单 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--crimson);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.98);
    z-index: 9999;
    overflow-y: auto;
    backdrop-filter: blur(10px);
}

.mobile-menu-overlay.active {
    display: block;
}

.mobile-menu {
    padding: 80px 30px 30px;
    max-width: 500px;
    margin: 0 auto;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 3px solid var(--blood-red);
}

.mobile-menu-close {
    background: var(--blood-red);
    border: 2px solid var(--crimson);
    color: var(--text-primary);
    font-size: 32px;
    width: 50px;
    height: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    clip-path: polygon(20% 0%, 80% 0%, 100% 20%, 100% 80%, 80% 100%, 20% 100%, 0% 80%, 0% 20%);
    transition: all 0.3s ease;
    font-weight: 300;
    line-height: 1;
}

.mobile-menu-close:hover {
    background: var(--crimson);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 0 25px rgba(220, 20, 60, 0.8);
}

.mobile-nav-list {
    list-style: none;
    padding: 0;
    margin-bottom: 40px;
}

.mobile-nav-list li {
    margin-bottom: 5px;
}

.mobile-nav-list a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 22px;
    font-weight: 700;
    display: block;
    padding: 20px 25px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: var(--deep-black);
    border-left: 4px solid var(--dark-gray);
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
}

.mobile-nav-list a:hover,
.mobile-nav-list a.active {
    color: var(--crimson);
    background: var(--dark-gray);
    border-left-color: var(--crimson);
    transform: translateX(10px);
}

.mobile-menu-footer {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--light-gray);
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
    margin-bottom: 15px;
}

/* ==========================================
   按钮系统 - 军械库风格
   ========================================== */
.btn {
    display: inline-block;
    padding: 15px 35px;
    font-size: 14px;
    font-weight: 900;
    text-decoration: none;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    position: relative;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    background: var(--deep-black);
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--blood-red);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn span {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--dark-red) 0%, var(--blood-red) 100%);
    color: var(--text-primary);
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 2px solid var(--crimson);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 30px rgba(139, 0, 0, 0.9);
    background: linear-gradient(135deg, var(--blood-red) 0%, var(--crimson) 100%);
}

.btn-secondary {
    background: var(--deep-black);
    color: var(--text-primary);
    border: 2px solid var(--crimson);
}

.btn-secondary:hover {
    background: var(--dark-gray);
    border-color: var(--warning);
    transform: translateY(-3px);
}

/* ==========================================
   首页英雄区 - 战术指挥中心
   ========================================== */
.hero {
    min-height: 85vh; /* 从100vh减少，让区域更紧凑 */
    display: flex;
    align-items: center;
    padding-top: 100px; /* 导航栏高度留白 */
    padding-bottom: 60px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(to bottom, var(--pure-black) 0%, var(--deep-black) 100%);
}

/* Hero网格背景已移除 - 仅保留动态扫描线 */

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.3;
    overflow: hidden;
}

/* 扫描线已移除 - 用户要求移除所有固定红线 */

.hero-background::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--blood-red) 0%, transparent 70%);
    opacity: 0.2;
    animation: pulse 4s ease-in-out infinite;
}

/* Hero 包装器 - 左右布局 */
.hero-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 650px;
}

.hero-title {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.1; /* 从1增加到1.1，让标题行间距稍微大一点 */
    margin-bottom: 25px; /* 从30px减少到25px */
    text-transform: uppercase;
    letter-spacing: -3px;
    color: var(--text-primary);
    text-shadow: 
        3px 3px 6px rgba(0, 0, 0, 0.9),
        0 0 30px rgba(139, 0, 0, 0.5);
    position: relative;
}

.gradient-text {
    color: var(--crimson);
    display: block;
    position: relative;
}

.gradient-text::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 200px;
    height: 4px;
    background: linear-gradient(90deg, var(--crimson) 0%, transparent 100%);
}

.hero-subtitle {
    font-size: 17px; /* 从18px稍微减小 */
    color: var(--text-secondary);
    margin-bottom: 35px; /* 从40px减少到35px */
    line-height: 1.7; /* 从1.8减少到1.7，更紧凑 */
    max-width: 700px;
    padding-left: 25px;
    border-left: 4px solid var(--dark-red);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 50px; /* 从60px减少到50px */
    flex-wrap: wrap;
}

.btn-hero {
    padding: 20px 50px;
    font-size: 16px;
    background: linear-gradient(135deg, var(--dark-red) 0%, var(--blood-red) 100%);
    color: var(--text-primary);
    box-shadow: 0 0 25px rgba(139, 0, 0, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 2px solid var(--crimson);
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 900;
}

.btn-hero:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 35px rgba(139, 0, 0, 0.95);
    background: linear-gradient(135deg, var(--blood-red) 0%, var(--crimson) 100%);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-card,
.stat-item {
    position: relative;
    padding: 20px 25px;
    background: var(--deep-black);
    border-left: 4px solid var(--blood-red);
    clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 15px, 100% 100%, 0 100%);
    transition: all 0.3s ease;
    text-align: center;
}

.stat-card:hover,
.stat-item:hover {
    background: var(--dark-gray);
    transform: translateX(10px);
    box-shadow: -5px 5px 20px rgba(139, 0, 0, 0.4);
}

.stat-number {
    font-size: 32px;
    font-weight: 900;
    color: var(--crimson);
    margin-bottom: 5px;
    text-shadow: 0 0 10px rgba(220, 20, 60, 0.6);
    display: block;
    transition: all 0.3s ease;
}

.stat-number.counting {
    animation: numberFlash 0.5s ease-in-out;
}

.stat-label {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ==========================================
   Hero 效果图轮播
   ========================================== */
.hero-showcase {
    position: relative;
    z-index: 2;
}

.showcase-container {
    position: relative;
    width: 100%;
    max-width: 900px; /* 从750px进一步增加到900px */
    margin: 0 auto;
    background: var(--dark-gray);
    border: 3px solid var(--medium-gray);
    border-radius: 8px;
    overflow: hidden;
    clip-path: polygon(
        0 0,
        calc(100% - 30px) 0,
        100% 30px,
        100% 100%,
        30px 100%,
        0 calc(100% - 30px)
    );
}

.showcase-slider {
    position: relative;
    width: 100%;
    height: 400px; /* 恢复到原始高度500px */
}

.showcase-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
    pointer-events: none;
}

.showcase-item.active {
    opacity: 1;
    pointer-events: all;
}

.showcase-image {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--deep-black) 0%, var(--dark-gray) 100%);
}

.showcase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.showcase-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px 20px 15px; /* 增加顶部padding，给指示器留空间 */
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
    color: var(--text-primary);
    font-size: 16px; /* 从18px减小到16px */
    font-weight: 700;
    text-align: center;
    letter-spacing: 1px;
    padding-bottom: 60px; /* 底部留60px空间给指示器 */
}

/* 指示器 */
.showcase-indicators {
    position: absolute;
    bottom: 20px; /* 从25px减少到20px */
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    background: var(--medium-gray);
    border: 2px solid var(--crimson);
    cursor: pointer;
    transition: all 0.3s ease;
    clip-path: polygon(30% 0%, 70% 0%, 100% 30%, 100% 70%, 70% 100%, 30% 100%, 0% 70%, 0% 30%);
}

.indicator:hover {
    background: var(--dark-red);
    transform: scale(1.2);
}

.indicator.active {
    background: var(--crimson);
    transform: scale(1.3);
    box-shadow: 0 0 10px var(--crimson);
    animation: blink 1.5s ease-in-out infinite;
}

/* 导航按钮 */
.showcase-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(139, 0, 0, 0.8);
    border: 2px solid var(--crimson);
    color: var(--text-primary);
    font-size: 32px;
    font-weight: 900;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    clip-path: polygon(20% 0%, 80% 0%, 100% 20%, 100% 80%, 80% 100%, 20% 100%, 0% 80%, 0% 20%);
}

.showcase-nav:hover {
    background: var(--crimson);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.8);
}

.showcase-nav.prev {
    left: 15px;
}

.showcase-nav.next {
    right: 15px;
}

/* ==========================================
   区块标题 - 任务简报风格
   ========================================== */
.section-header {
    text-align: left;
    margin-bottom: 70px;
    position: relative;
    padding-left: 30px;
}

.section-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 6px;
    height: 100%;
    background: linear-gradient(to bottom, var(--crimson) 0%, var(--dark-red) 100%);
}

.section-header::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 150px;
    height: 6px;
    background: linear-gradient(to right, var(--crimson) 0%, transparent 100%);
}

.section-title {
    font-size: 52px;
    font-weight: 900;
    margin-bottom: 20px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: -2px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 800px;
    line-height: 1.8;
}

/* ==========================================
   功能卡片 - 武器装备卡
   ========================================== */
.features, .features-section {
    padding: 100px 0;
    background: var(--deep-black);
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--dark-gray);
    padding: 40px;
    position: relative;
    clip-path: polygon(
        0 0, 
        calc(100% - 20px) 0, 
        100% 20px, 
        100% 100%, 
        20px 100%, 
        0 calc(100% - 20px)
    );
    border: 2px solid var(--medium-gray);
    transition: all 0.4s ease;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--dark-red) 0%, transparent 100%);
    clip-path: polygon(0 0, 100% 0, 100% 100%);
    opacity: 0.3;
}

.feature-card:hover {
    border-color: var(--blood-red);
    background: var(--medium-gray);
    transform: translateY(-5px);
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.8),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.feature-icon {
    font-size: 50px;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 10px rgba(139, 0, 0, 0.6));
    color: var(--crimson);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: rgba(139, 0, 0, 0.1);
    border: 2px solid var(--blood-red);
    clip-path: polygon(20% 0%, 80% 0%, 100% 20%, 100% 80%, 80% 100%, 20% 100%, 0% 80%, 0% 20%);
}

/* 使用伪元素显示图标 */
.feature-icon::before {
    content: attr(data-icon);
    font-size: 40px;
}

/* 具体图标映射 */
.feature-icon[data-icon="target"]::before {
    content: "🎯";
}

.feature-icon[data-icon="eye"]::before {
    content: "👁️";
}

.feature-icon[data-icon="shield"]::before {
    content: "🛡️";
}

.feature-icon[data-icon="bolt"]::before {
    content: "⚡";
}

.feature-icon[data-icon="control"]::before {
    content: "🎮";
}

.feature-icon[data-icon="settings"]::before {
    content: "⚙️";
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-primary);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
}

/* ==========================================
   技术优势 - 作战指令
   ========================================== */
.tech-section {
    padding: 100px 0;
    background: var(--pure-black);
}

.tech-grid {
    display: grid;
    gap: 40px;
}

.tech-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 40px;
    padding: 45px;
    background: var(--deep-black);
    border: 2px solid var(--dark-gray);
    border-left: 6px solid var(--blood-red);
    position: relative;
    transition: all 0.3s ease;
}

.tech-item::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, var(--dark-red) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.tech-item:hover {
    background: var(--dark-gray);
    transform: translateX(10px);
    box-shadow: -10px 10px 30px rgba(0, 0, 0, 0.7);
}

.tech-item:hover::before {
    opacity: 0.1;
}

.tech-icon {
    font-size: 48px;
    margin-bottom: 15px;
    filter: drop-shadow(0 0 15px rgba(139, 0, 0, 0.7));
    display: block;
    text-align: center;
}

.tech-number {
    font-size: 72px;
    font-weight: 900;
    color: var(--dark-red);
    line-height: 1;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.9);
    display: block;
    text-align: center;
}

.tech-item h3 {
    font-size: 28px;
    margin-bottom: 15px;
    color: var(--text-primary);
    font-weight: 900;
    text-transform: uppercase;
}

.tech-item p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 15px;
}

/* ==========================================
   用户评价 - 作战报告
   ========================================== */
.testimonials-section {
    padding: 100px 0;
    background: var(--deep-black);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: var(--dark-gray);
    padding: 35px;
    border: 2px solid var(--medium-gray);
    border-top: 4px solid var(--blood-red);
    position: relative;
    transition: all 0.3s ease;
}

.testimonial-card::before {
    content: '◢';
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 60px;
    color: var(--dark-red);
    opacity: 0.2;
}

.testimonial-card:hover {
    background: var(--medium-gray);
    border-color: var(--crimson);
    transform: translateY(-5px);
}

.rating {
    color: var(--rust);
    font-size: 20px;
    margin-bottom: 20px;
    letter-spacing: 3px;
}

.testimonial-text {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 25px;
    font-size: 14px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid var(--light-gray);
}

.author-avatar {
    width: 55px;
    height: 55px;
    background: var(--blood-red);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    clip-path: polygon(20% 0%, 100% 0%, 80% 100%, 0% 100%);
}

.author-name {
    font-weight: 700;
    margin-bottom: 3px;
    color: var(--text-primary);
}

.author-title {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ==========================================
   价格卡片 - 装备采购（首页预览）
   ========================================== */
.pricing, .pricing-preview {
    padding: 100px 0;
    background: var(--pure-black);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.pricing-card {
    background: var(--dark-gray);
    padding: 45px 35px;
    border: 3px solid var(--medium-gray);
    clip-path: polygon(
        0 20px, 
        20px 0, 
        100% 0, 
        100% calc(100% - 20px), 
        calc(100% - 20px) 100%, 
        0 100%
    );
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--dark-red) 0%, var(--crimson) 100%);
}

.pricing-card:hover {
    border-color: var(--blood-red);
    background: var(--medium-gray);
    transform: scale(1.03);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.8);
}

.pricing-card.featured {
    border-color: var(--crimson);
    background: linear-gradient(135deg, var(--dark-gray) 0%, var(--dark-purple) 100%);
}

.pricing-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--blood-red);
    font-size: 11px;
    font-weight: 900;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
    clip-path: polygon(5px 0%, 100% 0%, calc(100% - 5px) 100%, 0% 100%);
}

.pricing-card h3 {
    font-size: 30px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
}

.pricing-price {
    margin-bottom: 30px;
    padding: 25px 0;
    border-top: 1px solid var(--light-gray);
    border-bottom: 1px solid var(--light-gray);
}

.amount {
    font-size: 64px;
    font-weight: 900;
    color: var(--crimson);
    line-height: 1;
}

.currency, .period {
    font-size: 18px;
    color: var(--text-dim);
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.pricing-features li {
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 13px;
}

.pricing-features .check {
    color: var(--crimson);
    margin-right: 10px;
    font-weight: bold;
}

.btn-pricing {
    width: 100%;
    display: block;
    padding: 18px 40px;
    text-align: center;
    background: linear-gradient(135deg, var(--dark-red) 0%, var(--blood-red) 100%);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 900;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: 2px solid var(--crimson);
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.6);
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-pricing:hover {
    background: linear-gradient(135deg, var(--blood-red) 0%, var(--crimson) 100%);
    transform: translateY(-3px);
    box-shadow: 0 5px 30px rgba(139, 0, 0, 0.9);
}

/* ==========================================
   价格方案完整页面样式
   ========================================== */
.pricing-full-section {
    padding: 100px 0;
    background: var(--deep-black);
}

.pricing-grid-full {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 35px;
}

.pricing-card-full {
    background: var(--dark-gray);
    border: 3px solid var(--medium-gray);
    position: relative;
    overflow: hidden;
    clip-path: polygon(
        0 0,
        calc(100% - 25px) 0,
        100% 25px,
        100% 100%,
        0 100%
    );
    transition: all 0.4s ease;
}

.pricing-card-full::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, 
        var(--dark-red) 0%, 
        var(--crimson) 50%, 
        var(--dark-red) 100%);
    z-index: 1;
}

.pricing-card-full::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 60px 60px 0;
    border-color: transparent var(--blood-red) transparent transparent;
    opacity: 0.2;
}

.pricing-card-full:hover {
    border-color: var(--blood-red);
    background: var(--medium-gray);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9);
}

.pricing-card-full.popular {
    border-color: var(--crimson);
    background: linear-gradient(135deg, 
        var(--dark-gray) 0%, 
        var(--dark-purple) 100%);
    transform: scale(1.05);
}

.pricing-card-full.popular:hover {
    transform: translateY(-8px) scale(1.07);
}

.popular-badge {
    position: absolute;
    top: 25px;
    right: -30px;
    background: var(--crimson);
    color: var(--text-primary);
    padding: 8px 50px;
    font-size: 12px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
    transform: rotate(45deg);
    box-shadow: 0 0 20px rgba(220, 20, 60, 0.8);
    z-index: 2;
}

.pricing-header {
    padding: 35px;
    text-align: center;
    border-bottom: 2px solid var(--medium-gray);
    background: var(--deep-black);
}

.pricing-badge-top {
    display: inline-block;
    padding: 8px 20px;
    font-size: 11px;
    font-weight: 900;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 2px;
    clip-path: polygon(5px 0%, 100% 0%, calc(100% - 5px) 100%, 0% 100%);
    border: 2px solid;
}

.pricing-badge-top.trial {
    background: rgba(139, 0, 0, 0.3);
    border-color: var(--dark-red);
    color: var(--text-primary);
}

.pricing-badge-top.standard {
    background: rgba(139, 117, 85, 0.3);
    border-color: var(--dark-gold);
    color: var(--text-primary);
}

.pricing-badge-top.premium {
    background: rgba(139, 0, 0, 0.5);
    border-color: var(--crimson);
    color: var(--text-primary);
    box-shadow: 0 0 15px rgba(220, 20, 60, 0.5);
}

.pricing-badge-top.ultimate {
    background: rgba(139, 117, 85, 0.5);
    border-color: var(--rust);
    color: var(--text-primary);
}

.pricing-header h3 {
    font-size: 28px;
    margin-bottom: 12px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.pricing-desc {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.6;
}

.pricing-price-large {
    padding: 40px 35px;
    text-align: center;
    background: var(--dark-gray);
    border-bottom: 2px solid var(--medium-gray);
    position: relative;
}

.pricing-price-large::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--crimson) 50%, 
        transparent 100%);
}

.pricing-price-large::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--crimson) 50%, 
        transparent 100%);
}

.pricing-price-large .currency {
    font-size: 24px;
    color: var(--text-secondary);
    vertical-align: super;
    margin-right: 5px;
}

.pricing-price-large .amount {
    font-size: 72px;
    font-weight: 900;
    color: var(--crimson);
    line-height: 1;
    text-shadow: 0 0 20px rgba(220, 20, 60, 0.6);
}

.pricing-price-large .period {
    font-size: 20px;
    color: var(--text-dim);
    font-weight: 700;
}

.pricing-features-full {
    list-style: none;
    padding: 35px;
    background: var(--dark-gray);
}

.pricing-features-full li {
    padding: 14px 0;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.pricing-features-full li:hover {
    padding-left: 10px;
    color: var(--text-primary);
}

.pricing-features-full .icon {
    font-weight: 900;
    font-size: 16px;
    min-width: 20px;
    text-align: center;
    color: var(--crimson);
}

.btn-pricing-full {
    display: block;
    margin: 0 35px 30px;
    padding: 18px 40px;
    text-align: center;
    background: linear-gradient(135deg, var(--dark-red) 0%, var(--blood-red) 100%);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 900;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    border: 2px solid var(--crimson);
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.6);
    transition: all 0.3s ease;
}

.btn-pricing-full:hover {
    background: linear-gradient(135deg, var(--blood-red) 0%, var(--crimson) 100%);
    transform: translateY(-3px);
    box-shadow: 0 5px 30px rgba(139, 0, 0, 0.9);
}

.btn-pricing-full.highlight {
    background: var(--crimson);
    border-color: var(--warning);
    box-shadow: 0 0 30px rgba(220, 20, 60, 0.8);
}

.pricing-note {
    padding: 0 35px 35px;
    text-align: center;
    font-size: 12px;
    color: var(--text-dim);
    font-weight: 700;
}

/* ==========================================
   额外福利、支付方式等
   ========================================== */
.benefits-section {
    padding: 100px 0;
    background: var(--pure-black);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.benefit-card {
    background: var(--dark-gray);
    padding: 40px;
    border: 2px solid var(--medium-gray);
    border-left: 6px solid var(--blood-red);
    position: relative;
    clip-path: polygon(
        0 0,
        calc(100% - 20px) 0,
        100% 20px,
        100% 100%,
        0 100%
    );
    transition: all 0.3s ease;
}

.benefit-card:hover {
    background: var(--medium-gray);
    border-left-color: var(--crimson);
    transform: translateX(10px);
}

.benefit-icon {
    font-size: 56px;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 15px rgba(139, 0, 0, 0.6));
}

.benefit-card h3 {
    font-size: 24px;
    margin-bottom: 18px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.benefit-card p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 14px;
}

.payment-section {
    padding: 100px 0;
    background: var(--deep-black);
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.payment-card {
    background: var(--dark-gray);
    padding: 40px;
    text-align: center;
    border: 2px solid var(--medium-gray);
    border-top: 4px solid var(--blood-red);
    clip-path: polygon(
        10px 0,
        100% 0,
        100% calc(100% - 10px),
        calc(100% - 10px) 100%,
        0 100%,
        0 10px
    );
    transition: all 0.3s ease;
}

.payment-card:hover {
    border-top-color: var(--crimson);
    background: var(--medium-gray);
    transform: translateY(-5px);
}

.payment-icon {
    font-size: 60px;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 15px rgba(139, 0, 0, 0.5));
}

.payment-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.payment-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
}

.payment-guarantee {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding: 50px;
    background: var(--dark-gray);
    border: 2px solid var(--medium-gray);
    border-left: 6px solid var(--crimson);
}

.guarantee-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.guarantee-icon {
    font-size: 36px;
    filter: drop-shadow(0 0 10px rgba(220, 20, 60, 0.6));
    flex-shrink: 0;
}

.guarantee-item h4 {
    font-size: 16px;
    margin-bottom: 8px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--crimson);
}

.guarantee-item p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   FAQ 样式
   ========================================== */
.faq-section {
    padding: 100px 0;
    background: var(--deep-black);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.faq-item {
    background: var(--dark-gray);
    padding: 35px;
    border-left: 5px solid var(--blood-red);
    position: relative;
    transition: all 0.3s ease;
}

.faq-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, transparent 0%, var(--dark-red) 100%);
    clip-path: polygon(100% 0, 100% 100%, 0 100%);
    opacity: 0.2;
}

.faq-item:hover {
    background: var(--medium-gray);
    border-left-color: var(--crimson);
    transform: translateX(10px);
}

.faq-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--crimson);
    font-weight: 800;
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
}

.faq-pricing-section,
.faq-download-section,
.faq-support-section {
    padding: 100px 0;
    background: var(--pure-black);
}

.faq-list {
    display: grid;
    gap: 30px;
}

.faq-item-large {
    background: var(--dark-gray);
    padding: 40px;
    border: 2px solid var(--medium-gray);
    border-left: 6px solid var(--blood-red);
    position: relative;
    transition: all 0.3s ease;
}

.faq-item-large::after {
    content: '?';
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 80px;
    font-weight: 900;
    color: var(--dark-red);
    opacity: 0.08;
}

.faq-item-large:hover {
    background: var(--medium-gray);
    border-left-color: var(--crimson);
    transform: translateX(10px);
}

.faq-item-large h3 {
    font-size: 22px;
    margin-bottom: 20px;
    color: var(--crimson);
    font-weight: 900;
    text-transform: uppercase;
}

.faq-item-large p {
    color: var(--text-secondary);
    line-height: 2;
    font-size: 15px;
}

.faq-categories {
    display: grid;
    gap: 50px;
}

.faq-category {
    background: var(--dark-gray);
    padding: 45px;
    border: 2px solid var(--medium-gray);
    border-left: 6px solid var(--blood-red);
}

.faq-category h3 {
    font-size: 28px;
    margin-bottom: 30px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--crimson);
    padding-bottom: 15px;
    border-bottom: 2px solid var(--medium-gray);
}

.faq-items {
    display: grid;
    gap: 20px;
}

.faq-accordion {
    background: var(--deep-black);
    border: 1px solid var(--medium-gray);
}

.faq-question {
    padding: 20px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    border-left: 4px solid var(--dark-red);
}

.faq-question:hover {
    background: var(--dark-gray);
    border-left-color: var(--crimson);
    color: var(--crimson);
}

.faq-answer {
    padding: 25px;
    background: var(--dark-gray);
    color: var(--text-secondary);
    line-height: 2;
    font-size: 14px;
}

/* ==========================================
   CTA区域 - 征召令
   ========================================== */
.cta-section {
    padding: 100px 0;
    background: var(--pure-black);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--blood-red) 0%, transparent 70%);
    opacity: 0.15;
}

.cta-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 40px;
    background: var(--deep-black);
    border: 3px solid var(--blood-red);
    clip-path: polygon(
        30px 0, 
        100% 0, 
        100% calc(100% - 30px), 
        calc(100% - 30px) 100%, 
        0 100%, 
        0 30px
    );
}

.cta-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.9);
}

.cta-content p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-cta-primary,
.btn-cta-secondary {
    padding: 18px 50px;
    font-size: 15px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-decoration: none;
    display: inline-block;
    border: 2px solid var(--crimson);
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-cta-primary {
    background: linear-gradient(135deg, var(--dark-red) 0%, var(--blood-red) 100%);
    color: var(--text-primary);
    box-shadow: 0 0 25px rgba(139, 0, 0, 0.7);
}

.btn-cta-primary:hover {
    background: linear-gradient(135deg, var(--blood-red) 0%, var(--crimson) 100%);
    transform: translateY(-3px);
    box-shadow: 0 5px 35px rgba(139, 0, 0, 0.9);
}

.btn-cta-secondary {
    background: var(--deep-black);
    color: var(--text-primary);
}

.btn-cta-secondary:hover {
    background: var(--dark-gray);
    border-color: var(--crimson);
    transform: translateY(-3px);
}

/* ==========================================
   页脚 - 指挥部信息
   ========================================== */
.footer {
    background: var(--pure-black);
    padding: 70px 0 40px;
    border-top: 4px solid var(--blood-red);
}

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

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--crimson);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.footer-col p,
.footer-col ul li {
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 10px;
    font-size: 13px;
}

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

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

.footer-col a:hover {
    color: var(--crimson);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--light-gray);
    color: var(--text-dim);
    font-size: 12px;
}

/* ==========================================
   页面标题（内页通用）
   ========================================== */
.page-header {
    padding: 120px 0 60px; /* 从180px/100px减少到120px/60px，更紧凑 */
    background: var(--pure-black);
    position: relative;
    text-align: center;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: 
        linear-gradient(135deg, var(--dark-red) 0%, transparent 50%),
        linear-gradient(225deg, var(--dark-purple) 0%, transparent 50%);
    opacity: 0.2;
}

.page-header h1 {
    font-size: 56px; /* 从64px减小到56px */
    font-weight: 900;
    margin-bottom: 15px; /* 从20px减少到15px */
    text-transform: uppercase;
    color: var(--text-primary);
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.9);
    position: relative;
    z-index: 2;
    letter-spacing: -1px; /* 新增，让标题更紧凑 */
}

.page-header p {
    font-size: 17px; /* 从18px减小到17px */
    color: var(--text-secondary);
    position: relative;
    z-index: 2;
    max-width: 800px; /* 新增，限制最大宽度 */
    margin: 0 auto; /* 居中显示 */
    line-height: 1.6; /* 新增，控制行高 */
}

/* ==========================================
   功能介绍页面样式
   ========================================== */
.features-detail-section {
    padding: 80px 0;
    background: var(--deep-black);
}

.feature-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    margin-bottom: 100px;
    align-items: center;
}

.feature-detail.reverse {
    direction: rtl;
}

.feature-detail.reverse > * {
    direction: ltr;
}

.feature-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--blood-red);
    font-size: 11px;
    font-weight: 900;
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 2px;
    clip-path: polygon(5px 0%, 100% 0%, calc(100% - 5px) 100%, 0% 100%);
}

.feature-detail h2 {
    font-size: 42px;
    margin-bottom: 25px;
    color: var(--text-primary);
    font-weight: 900;
    text-transform: uppercase;
}

.feature-intro {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 2;
    margin-bottom: 35px;
    padding-left: 25px;
    border-left: 4px solid var(--dark-red);
}

.feature-specs {
    display: grid;
    gap: 30px;
}

.spec-item {
    background: var(--dark-gray);
    padding: 25px;
    border-left: 4px solid var(--blood-red);
    clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 15px, 100% 100%, 0 100%);
    transition: all 0.3s ease;
}

.spec-item:hover {
    background: var(--medium-gray);
    border-left-color: var(--crimson);
    transform: translateX(10px);
}

.spec-item h4 {
    font-size: 18px;
    color: var(--crimson);
    margin-bottom: 12px;
    font-weight: 800;
}

.spec-item p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 14px;
}

.feature-detail-image {
    position: relative;
}

.feature-visual {
    width: 100%;
    height: 450px;
    background: var(--dark-gray);
    border: 3px solid var(--medium-gray);
    clip-path: polygon(
        20px 0,
        100% 0,
        100% calc(100% - 20px),
        calc(100% - 20px) 100%,
        0 100%,
        0 20px
    );
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-content {
    text-align: center;
    color: var(--text-dim);
    font-size: 48px;
    position: relative;
}

/* 功能视觉元素动画 */
.crosshair {
    width: 80px;
    height: 80px;
    border: 3px solid var(--crimson);
    border-radius: 50%;
    position: relative;
    margin: 0 auto 20px;
    animation: pulse 2s ease-in-out infinite;
}

.crosshair::before,
.crosshair::after {
    content: '';
    position: absolute;
    background: var(--crimson);
}

.crosshair::before {
    width: 2px;
    height: 100%;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
}

.crosshair::after {
    width: 100%;
    height: 2px;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}

.target-box {
    width: 120px;
    height: 120px;
    border: 2px solid var(--blood-red);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: borderScan 3s ease-in-out infinite;
}

.target-box::before,
.target-box::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 3px solid var(--crimson);
}

.target-box::before {
    top: -3px;
    left: -3px;
    border-right: none;
    border-bottom: none;
}

.target-box::after {
    bottom: -3px;
    right: -3px;
    border-left: none;
    border-top: none;
}

/* 扫描线特效 - 全局动态效果 */
.scan-line {
    position: fixed; /* 固定在屏幕上 */
    width: 100%;
    height: 3px; /* 从2px增加到3px，更明显 */
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--blood-red) 30%,
        var(--crimson) 50%, 
        var(--blood-red) 70%,
        transparent 100%
    );
    box-shadow: 
        0 0 30px var(--crimson),
        0 0 60px rgba(220, 20, 60, 0.5); /* 增强光晕效果 */
    animation: scanline 4s linear infinite; /* 4秒一个循环 */
    left: 0;
    top: 0;
    pointer-events: none; /* 不影响页面交互 */
    z-index: 9999; /* 确保在最上层 */
    opacity: 0.7; /* 从0.6增加到0.7 */
}

.comparison-section {
    padding: 100px 0;
    background: var(--deep-black);
}

.comparison-table {
    width: 100%;
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--dark-gray);
    border: 3px solid var(--medium-gray);
}

.comparison-table thead {
    background: var(--deep-black);
}

.comparison-table th {
    padding: 25px 20px;
    text-align: center;
    font-size: 14px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-primary);
    border-bottom: 3px solid var(--blood-red);
    border-right: 1px solid var(--medium-gray);
}

.comparison-table th:first-child {
    text-align: left;
    color: var(--crimson);
}

.comparison-table th:last-child {
    border-right: none;
}

.comparison-table tbody tr:hover {
    background: var(--medium-gray);
}

.comparison-table td {
    padding: 20px;
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.comparison-table td:first-child {
    text-align: left;
    font-weight: 700;
    color: var(--text-primary);
}

.comparison-table td:last-child {
    border-right: none;
}

/* ==========================================
   下载中心页面样式
   ========================================== */
.download-main-section {
    padding: 80px 0;
    background: var(--deep-black);
}

.download-hero {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    background: var(--dark-gray);
    padding: 60px;
    border: 3px solid var(--medium-gray);
    border-left: 8px solid var(--blood-red);
}

.version-badge {
    display: inline-block;
    padding: 10px 25px;
    background: var(--blood-red);
    font-size: 13px;
    font-weight: 900;
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 2px;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.6);
    animation: glowPulse 2s ease-in-out infinite;
}

.download-hero h2 {
    font-size: 36px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
}

.version-info {
    color: var(--text-secondary);
    line-height: 2.2;
    margin: 25px 0;
    padding-left: 20px;
    border-left: 3px solid var(--dark-red);
}

.download-stats {
    display: flex;
    gap: 40px;
    margin: 35px 0;
}

.download-stats .stat {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.download-stats .stat-number {
    font-size: 28px;
    font-weight: 900;
    color: var(--crimson);
}

.download-stats .stat-label {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.btn-download-primary,
.btn-download-secondary {
    justify-content: center;
    align-items: center;
    padding: 18px 40px;
    display: flex;
    font-weight: 900;
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-decoration: none;
    border: 2px solid var(--crimson);
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-download-primary {
    background: linear-gradient(135deg, var(--dark-red) 0%, var(--blood-red) 100%);
    color: var(--text-primary);
    box-shadow: 0 0 25px rgba(139, 0, 0, 0.7);
}

.btn-download-primary:hover {
    background: linear-gradient(135deg, var(--blood-red) 0%, var(--crimson) 100%);
    transform: translateY(-3px);
    box-shadow: 0 5px 35px rgba(139, 0, 0, 0.9);
}

.btn-download-secondary {
    background: var(--deep-black);
    color: var(--text-primary);
    border: 2px solid var(--dark-gold);
}

.btn-download-secondary:hover {
    background: var(--dark-gray);
    border-color: var(--crimson);
    transform: translateY(-3px);
}

.btn-icon {
    margin-right: 12px;
    font-size: 18px;
}

.download-note {
    margin-top: 20px;
    font-size: 13px;
    color: var(--text-dim);
    padding: 15px;
    background: var(--deep-black);
    border-left: 3px solid var(--dark-gold);
}

.download-note a {
    color: var(--crimson);
    text-decoration: none;
    font-weight: 700;
}

.download-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.download-icon {
    font-size: 80px;
    margin-bottom: 30px;
    filter: drop-shadow(0 0 20px rgba(139, 0, 0, 0.6));
}

.changelog-section {
    padding: 80px 0;
    background: var(--pure-black);
}

.changelog-list {
    display: grid;
    gap: 40px;
}

.changelog-item {
    background: var(--dark-gray);
    border: 2px solid var(--medium-gray);
    border-left: 6px solid var(--blood-red);
}

.changelog-item.current {
    border-left-color: var(--crimson);
    background: linear-gradient(135deg, var(--dark-gray) 0%, var(--dark-purple) 100%);
}

.changelog-header {
    padding: 30px 40px;
    background: var(--deep-black);
    border-bottom: 2px solid var(--medium-gray);
}

.changelog-version {
    display: flex;
    align-items: center;
    gap: 20px;
}

.version-tag {
    display: inline-block;
    padding: 6px 15px;
    background: var(--blood-red);
    font-size: 10px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1px;
    clip-path: polygon(3px 0%, 100% 0%, calc(100% - 3px) 100%, 0% 100%);
}

.version-tag.current {
    background: var(--crimson);
    box-shadow: 0 0 15px rgba(220, 20, 60, 0.6);
}

.changelog-version h3 {
    font-size: 28px;
    font-weight: 900;
    color: var(--text-primary);
}

.version-date {
    font-size: 13px;
    color: var(--text-dim);
    margin-left: auto;
}

.changelog-content {
    padding: 40px;
}

.changelog-category {
    margin-bottom: 30px;
}

.changelog-category h4 {
    font-size: 18px;
    color: var(--crimson);
    margin-bottom: 15px;
    font-weight: 800;
    text-transform: uppercase;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--dark-gray);
}

.changelog-category ul {
    list-style: none;
    padding-left: 0;
}

.changelog-category li {
    padding: 10px 0 10px 25px;
    color: var(--text-secondary);
    line-height: 1.8;
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.changelog-category li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--crimson);
    font-weight: 900;
}

.requirements-section {
    padding: 80px 0;
    background: var(--deep-black);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.requirement-card {
    background: var(--dark-gray);
    padding: 40px;
    border: 2px solid var(--medium-gray);
    position: relative;
    clip-path: polygon(
        15px 0,
        100% 0,
        100% calc(100% - 15px),
        calc(100% - 15px) 100%,
        0 100%,
        0 15px
    );
}

.requirement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--dark-red) 0%, transparent 100%);
}

.requirement-card.recommended {
    border-color: var(--blood-red);
    background: linear-gradient(135deg, var(--dark-gray) 0%, var(--dark-purple) 100%);
}

.recommended-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 8px 18px;
    background: var(--blood-red);
    font-size: 11px;
    font-weight: 900;
    text-transform: uppercase;
    clip-path: polygon(5px 0%, 100% 0%, calc(100% - 5px) 100%, 0% 100%);
}

.requirement-card h3 {
    font-size: 28px;
    margin-bottom: 30px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.requirement-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 20px;
    padding: 15px 0;
    border-bottom: 1px solid var(--light-gray);
}

.req-label {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

.req-value {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
}

.requirements-note {
    margin-top: 40px;
    padding: 30px;
    background: var(--dark-gray);
    border-left: 5px solid var(--dark-gold);
}

.requirements-note p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 14px;
}

.installation-section {
    padding: 80px 0;
    background: var(--deep-black);
}

.installation-steps {
    display: grid;
    gap: 30px;
}

.step-card {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 30px;
    padding: 40px;
    background: var(--dark-gray);
    border: 2px solid var(--medium-gray);
    border-left: 5px solid var(--blood-red);
    transition: all 0.3s ease;
}

.step-card:hover {
    background: var(--medium-gray);
    border-left-color: var(--crimson);
    transform: translateX(10px);
}

.step-number {
    width: 80px;
    height: 80px;
    background: var(--blood-red);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: 900;
    clip-path: polygon(20% 0%, 100% 0%, 80% 100%, 0% 100%);
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.6);
}

.step-content h3 {
    font-size: 24px;
    margin-bottom: 18px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 15px;
}

.step-content a {
    color: var(--crimson);
    font-weight: 700;
}

.other-downloads-section {
    padding: 80px 0;
    background: var(--pure-black);
}

.downloads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.download-card {
    background: var(--dark-gray);
    padding: 40px;
    text-align: center;
    border: 2px solid var(--medium-gray);
    border-top: 4px solid var(--blood-red);
    clip-path: polygon(
        12px 0,
        100% 0,
        100% calc(100% - 12px),
        calc(100% - 12px) 100%,
        0 100%,
        0 12px
    );
    transition: all 0.3s ease;
}

.download-card:hover {
    border-top-color: var(--crimson);
    background: var(--medium-gray);
    transform: translateY(-5px);
}

.download-card .download-icon {
    font-size: 56px;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 15px rgba(139, 0, 0, 0.6));
}

.download-card h3 {
    font-size: 22px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.download-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
    margin-bottom: 25px;
}

.download-links {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.link-btn {
    padding: 12px 25px;
    background: var(--deep-black);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    border: 2px solid var(--medium-gray);
    clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
    transition: all 0.3s ease;
}

.link-btn:hover {
    background: var(--blood-red);
    border-color: var(--crimson);
    color: var(--text-primary);
}

/* ==========================================
   使用教程页面样式
   ========================================== */
.tutorial-nav-section {
    padding: 60px 0;
    background: var(--pure-black);
}

.tutorial-categories {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.category-btn {
    padding: 15px 30px;
    background: var(--dark-gray);
    border: 2px solid var(--medium-gray);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    transition: all 0.3s ease;
}

.category-btn:hover {
    background: var(--blood-red);
    border-color: var(--crimson);
    color: var(--text-primary);
    transform: translateY(-3px);
}

.tutorial-section {
    padding: 80px 0;
    background: var(--pure-black);
}

.tutorial-section.alt {
    background: var(--deep-black);
}

.tutorial-content {
    display: grid;
    gap: 40px;
}

.tutorial-step {
    background: var(--dark-gray);
    padding: 45px;
    border: 2px solid var(--medium-gray);
    border-left: 8px solid var(--blood-red);
    clip-path: polygon(
        0 0,
        calc(100% - 25px) 0,
        100% 25px,
        100% 100%,
        0 100%
    );
}

.tutorial-step-header {
    display: flex;
    align-items: center;
    gap: 25px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--light-gray);
}

.step-number {
    background: var(--blood-red);
    padding: 15px 25px;
    font-weight: 900;
    font-size: 18px;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.5);
}

.tutorial-step h3 {
    font-size: 26px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.tutorial-step-content ul,
.tutorial-step-content ol {
    margin: 25px 0;
    padding-left: 30px;
}

.tutorial-step-content li {
    margin: 18px 0;
    color: var(--text-secondary);
    line-height: 2;
    padding-left: 15px;
}

.tutorial-step-content li strong {
    color: var(--crimson);
    font-weight: 800;
}

.tutorial-tip,
.tutorial-warning {
    padding: 25px;
    margin-top: 25px;
    border-left: 5px solid;
}

.tutorial-tip {
    background: rgba(139, 117, 85, 0.1);
    border-left-color: var(--dark-gold);
}

.tutorial-warning {
    background: rgba(139, 0, 0, 0.1);
    border-left-color: var(--crimson);
}

.tutorial-tip strong,
.tutorial-warning strong {
    color: var(--crimson);
}

.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 35px;
}

.tutorial-card {
    background: var(--dark-gray);
    padding: 40px;
    border: 2px solid var(--medium-gray);
    border-left: 5px solid var(--blood-red);
    clip-path: polygon(
        0 0,
        calc(100% - 18px) 0,
        100% 18px,
        100% 100%,
        0 100%
    );
    transition: all 0.3s ease;
}

.tutorial-card:hover {
    background: var(--medium-gray);
    border-left-color: var(--crimson);
    transform: translateX(10px);
}

.tutorial-card-icon {
    font-size: 48px;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 15px rgba(139, 0, 0, 0.6));
}

.tutorial-card h3 {
    font-size: 22px;
    margin-bottom: 18px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--crimson);
}

.tutorial-card p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 14px;
    margin-bottom: 15px;
}

.tutorial-card p strong {
    color: var(--crimson);
    font-weight: 800;
}

.hotkey-table {
    display: grid;
    gap: 12px;
    margin: 25px 0;
}

.hotkey-row {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 18px;
    background: var(--deep-black);
    border: 1px solid var(--medium-gray);
    border-left: 4px solid var(--blood-red);
    transition: all 0.3s ease;
}

.hotkey-row:hover {
    background: var(--dark-gray);
    border-left-color: var(--crimson);
    transform: translateX(5px);
}

.hotkey-key {
    background: var(--blood-red);
    padding: 10px 25px;
    border: 2px solid var(--crimson);
    font-weight: 900;
    font-size: 14px;
    min-width: 120px;
    text-align: center;
    clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
    box-shadow: 0 0 15px rgba(139, 0, 0, 0.5);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hotkey-desc {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
}

.advanced-tutorials {
    display: flex;
    flex-direction: column;
    gap: 35px;
}

.advanced-tutorial-item {
    background: var(--dark-gray);
    padding: 40px;
    border: 2px solid var(--medium-gray);
    border-left: 5px solid var(--crimson);
    transition: all 0.3s ease;
}

.advanced-tutorial-item:hover {
    background: var(--medium-gray);
    transform: translateX(10px);
}

.advanced-tutorial-item h3 {
    font-size: 24px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.advanced-tutorial-item p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 15px;
    margin-bottom: 18px;
}

.advanced-tutorial-item strong {
    color: var(--crimson);
    font-weight: 800;
}

.tutorial-example {
    margin-top: 25px;
    padding: 25px;
    background: rgba(139, 0, 0, 0.1);
    border-left: 4px solid var(--crimson);
}

.tutorial-example strong {
    color: var(--crimson);
    display: block;
    margin-bottom: 10px;
    font-size: 16px;
}

.troubleshoot-list {
    display: grid;
    gap: 35px;
}

.troubleshoot-item {
    background: var(--dark-gray);
    padding: 35px;
    border: 2px solid var(--medium-gray);
    border-top: 4px solid var(--dark-red);
    clip-path: polygon(
        10px 0,
        100% 0,
        100% calc(100% - 10px),
        calc(100% - 10px) 100%,
        0 100%,
        0 10px
    );
    transition: all 0.3s ease;
}

.troubleshoot-item:hover {
    border-top-color: var(--crimson);
    background: var(--medium-gray);
    transform: translateY(-3px);
}

.troubleshoot-item h3 {
    font-size: 22px;
    margin-bottom: 18px;
    color: var(--text-primary);
    font-weight: 800;
    text-transform: uppercase;
}

.troubleshoot-solution {
    color: var(--text-secondary);
}

.troubleshoot-solution strong {
    color: var(--text-primary);
    font-weight: 800;
    display: block;
    margin-bottom: 15px;
    font-size: 16px;
}

.troubleshoot-solution ol,
.troubleshoot-solution ul {
    margin: 15px 0;
    padding-left: 25px;
}

.troubleshoot-solution li {
    margin: 12px 0;
    line-height: 2;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.tip-card {
    background: var(--dark-gray);
    padding: 40px;
    border: 2px solid var(--medium-gray);
    border-top: 4px solid var(--blood-red);
    text-align: center;
    clip-path: polygon(
        10px 0,
        100% 0,
        100% calc(100% - 10px),
        calc(100% - 10px) 100%,
        0 100%,
        0 10px
    );
    transition: all 0.3s ease;
}

.tip-card:hover {
    border-top-color: var(--crimson);
    background: var(--medium-gray);
    transform: translateY(-5px);
}

.tip-icon {
    font-size: 52px;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 15px rgba(139, 0, 0, 0.6));
}

.tip-card h3 {
    font-size: 22px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.tip-card p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 14px;
    text-align: left;
}

.video-tutorials-section {
    padding: 80px 0;
    background: var(--deep-black);
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.video-card {
    background: var(--dark-gray);
    border: 2px solid var(--medium-gray);
    overflow: hidden;
    transition: all 0.3s ease;
    clip-path: polygon(
        0 0,
        calc(100% - 20px) 0,
        100% 20px,
        100% 100%,
        0 100%
    );
}

.video-card:hover {
    border-color: var(--blood-red);
    transform: translateY(-5px);
}

.video-thumbnail {
    width: 100%;
    height: 200px;
    background: var(--deep-black);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border-bottom: 3px solid var(--blood-red);
}

.play-icon {
    font-size: 56px;
    color: var(--crimson);
    filter: drop-shadow(0 0 20px rgba(220, 20, 60, 0.8));
}

.video-duration {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: var(--blood-red);
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 900;
    clip-path: polygon(4px 0%, 100% 0%, calc(100% - 4px) 100%, 0% 100%);
}

.video-card h3 {
    font-size: 18px;
    margin: 20px 25px 15px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.video-card p {
    margin: 0 25px 25px;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.7;
}

/* ==========================================
   技术支持页面样式
   ========================================== */
.contact-section {
    padding: 80px 0;
    background: var(--pure-black);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.contact-card {
    background: var(--dark-gray);
    padding: 40px;
    border: 2px solid var(--medium-gray);
    text-align: center;
    position: relative;
    clip-path: polygon(
        12px 0,
        100% 0,
        100% calc(100% - 12px),
        calc(100% - 12px) 100%,
        0 100%,
        0 12px
    );
    transition: all 0.3s ease;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--crimson) 0%, var(--dark-red) 100%);
}

.contact-card:hover {
    border-color: var(--blood-red);
    background: var(--medium-gray);
    transform: translateY(-8px);
}

.contact-card.featured {
    border-color: var(--crimson);
    background: linear-gradient(135deg, var(--dark-gray) 0%, var(--dark-purple) 100%);
}

.contact-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 8px 18px;
    background: var(--blood-red);
    font-size: 11px;
    font-weight: 900;
    text-transform: uppercase;
    clip-path: polygon(5px 0%, 100% 0%, calc(100% - 5px) 100%, 0% 100%);
}

.contact-icon {
    font-size: 56px;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 15px rgba(139, 0, 0, 0.6));
}

.contact-card h3 {
    font-size: 26px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.contact-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
    margin-bottom: 20px;
}

.contact-info {
    margin: 25px 0;
    text-align: left;
}

.contact-info p {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 14px;
}

.contact-info strong {
    color: var(--crimson);
    font-weight: 800;
}

.btn-contact {
    width: 100%;
    margin-top: 20px;
    display: block;
    padding: 16px 30px;
    text-align: center;
    background: linear-gradient(135deg, var(--dark-red) 0%, var(--blood-red) 100%);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 900;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: 2px solid var(--crimson);
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.6);
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-contact:hover {
    background: linear-gradient(135deg, var(--blood-red) 0%, var(--crimson) 100%);
    transform: translateY(-3px);
    box-shadow: 0 5px 30px rgba(139, 0, 0, 0.9);
}

.service-levels-section {
    padding: 80px 0;
    background: var(--deep-black);
}

.service-levels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 35px;
}

.service-level-card {
    background: var(--dark-gray);
    padding: 40px;
    border: 2px solid var(--medium-gray);
    border-top: 4px solid var(--blood-red);
    position: relative;
    clip-path: polygon(
        12px 0,
        100% 0,
        100% calc(100% - 12px),
        calc(100% - 12px) 100%,
        0 100%,
        0 12px
    );
    transition: all 0.3s ease;
}

.service-level-card:hover {
    background: var(--medium-gray);
    border-top-color: var(--crimson);
    transform: translateY(-5px);
}

.service-level-card.highlight {
    border-color: var(--crimson);
    background: linear-gradient(135deg, var(--dark-gray) 0%, var(--dark-purple) 100%);
}

.service-level-card h3 {
    font-size: 24px;
    margin-bottom: 25px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
    padding-bottom: 15px;
    border-bottom: 2px solid var(--medium-gray);
}

.level-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 20px;
    background: var(--crimson);
    font-size: 11px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    box-shadow: 0 0 20px rgba(220, 20, 60, 0.8);
}

.service-features {
    padding: 30px 0;
}

.service-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 14px;
    color: var(--text-secondary);
}

.service-icon {
    font-weight: 900;
    font-size: 16px;
    color: var(--crimson);
}

.service-item.gray {
    opacity: 0.4;
}

.service-item.gray .service-icon {
    color: var(--text-dim);
}

.ticket-section {
    padding: 100px 0;
    background: var(--pure-black);
}

.ticket-form-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

.ticket-form {
    background: var(--dark-gray);
    padding: 45px;
    border: 2px solid var(--medium-gray);
    border-left: 6px solid var(--blood-red);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-weight: 800;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    background: var(--deep-black);
    border: 2px solid var(--medium-gray);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--crimson);
    background: var(--dark-gray);
    box-shadow: 0 0 15px rgba(139, 0, 0, 0.3);
}

.form-group small {
    display: block;
    margin-top: 8px;
    color: var(--text-dim);
    font-size: 12px;
}

.btn-submit {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, var(--dark-red) 0%, var(--blood-red) 100%);
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    border: 2px solid var(--crimson);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    background: linear-gradient(135deg, var(--blood-red) 0%, var(--crimson) 100%);
    transform: translateY(-3px);
    box-shadow: 0 5px 30px rgba(139, 0, 0, 0.9);
}

.ticket-tips {
    background: var(--dark-gray);
    padding: 35px;
    border: 2px solid var(--medium-gray);
    border-left: 6px solid var(--dark-gold);
}

.ticket-tips h4 {
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--dark-gold);
}

.ticket-tips ul {
    list-style: none;
}

.ticket-tips li {
    padding: 12px 0 12px 20px;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 13px;
    position: relative;
}

.ticket-tips li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--dark-gold);
    font-weight: 900;
}

.feedback-section {
    padding: 100px 0;
    background: var(--deep-black);
}

.feedback-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.feedback-card {
    background: var(--dark-gray);
    padding: 40px;
    text-align: center;
    border: 2px solid var(--medium-gray);
    border-top: 4px solid var(--blood-red);
    clip-path: polygon(
        10px 0,
        100% 0,
        100% calc(100% - 10px),
        calc(100% - 10px) 100%,
        0 100%,
        0 10px
    );
    transition: all 0.3s ease;
}

.feedback-card:hover {
    background: var(--medium-gray);
    border-top-color: var(--crimson);
    transform: translateY(-5px);
}

.feedback-card h3 {
    font-size: 22px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.feedback-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
    margin-bottom: 25px;
}

.btn-feedback {
    display: inline-block;
    padding: 12px 30px;
    background: var(--blood-red);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 900;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: 2px solid var(--crimson);
    clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
    transition: all 0.3s ease;
}

.btn-feedback:hover {
    background: var(--crimson);
    transform: translateY(-3px);
}

.community-section {
    padding: 100px 0;
    background: var(--pure-black);
}

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 35px;
}

.community-card {
    background: var(--dark-gray);
    padding: 45px;
    text-align: center;
    border: 2px solid var(--medium-gray);
    border-left: 5px solid var(--blood-red);
    transition: all 0.3s ease;
}

.community-card:hover {
    background: var(--medium-gray);
    border-left-color: var(--crimson);
    transform: translateY(-5px);
}

.community-icon {
    font-size: 60px;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 15px rgba(139, 0, 0, 0.6));
}

.community-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
}

.community-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
    margin-bottom: 25px;
}

.community-stats {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin: 25px 0;
    font-size: 12px;
    color: var(--text-dim);
    font-weight: 700;
}

.btn-community {
    display: inline-block;
    padding: 15px 35px;
    background: var(--blood-red);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 900;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: 2px solid var(--crimson);
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    transition: all 0.3s ease;
}

.btn-community:hover {
    background: var(--crimson);
    transform: translateY(-3px);
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu,
    .nav-buttons {
        display: none;
    }
    
    .page-header {
        padding: 100px 0 50px; /* 移动端更紧凑 */
    }
    
    .page-header h1 {
        font-size: 40px; /* 移动端标题字号 */
    }
    
    .page-header p {
        font-size: 16px;
    }
    
    .hero-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .showcase-slider {
        height: 350px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .features-grid,
    .testimonials-grid,
    .pricing-cards,
    .pricing-grid-full,
    .benefits-grid,
    .payment-methods,
    .downloads-grid,
    .tips-grid,
    .videos-grid,
    .feedback-grid,
    .community-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-item {
        grid-template-columns: 1fr;
    }
    
    .feature-detail,
    .download-hero,
    .requirements-grid,
    .ticket-form-wrapper {
        grid-template-columns: 1fr;
    }
    
    .step-card {
        grid-template-columns: 60px 1fr;
        gap: 20px;
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 90px 0 40px; /* 小屏幕更紧凑 */
    }
    
    .page-header h1 {
        font-size: 32px; /* 小屏幕标题字号 */
    }
    
    .page-header p {
        font-size: 15px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 28px;
    }
}

/* ==========================================
   动画效果 - Keyframes
   ========================================== */

/* 扫描线动画 - 全局动态特效 */
@keyframes scanline {
    0% {
        transform: translateY(-100%);
    }
    100% {
        transform: translateY(100vh);
    }
}

/* 脉冲动画 */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.05);
    }
}

/* 闪烁动画 */
@keyframes blink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.3;
    }
}

/* 光晕脉冲 */
@keyframes glowPulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(139, 0, 0, 0.6);
    }
    50% {
        box-shadow: 0 0 40px rgba(220, 20, 60, 0.9);
    }
}

/* 渐入动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 从左滑入 */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 从右滑入 */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 旋转动画 */
@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 边框扫描动画 */
@keyframes borderScan {
    0%, 100% {
        border-color: var(--blood-red);
    }
    50% {
        border-color: var(--crimson);
    }
}

/* 背景脉冲 */
@keyframes bgPulse {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* 数字递增闪烁 */
@keyframes numberFlash {
    0%, 100% {
        text-shadow: 0 0 10px rgba(220, 20, 60, 0.5);
    }
    50% {
        text-shadow: 0 0 20px rgba(220, 20, 60, 1);
    }
}