/* 程序TG：@changhong8811 */
/* ===== 基础样式 ===== */
:root {
    --primary: #7c3aed;
    --primary-dark: #5b21b6;
    --primary-light: #a78bfa;
    --secondary: #06b6d4;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --dark: #0f172a;
    --dark-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --card-bg: rgba(30, 41, 59, 0.8);
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    --gradient-hero: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4c1d95 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--primary-light);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-size: 15px;
}

.nav-link:hover,
.nav-link.active {
    background: var(--primary);
    color: white;
}

.btn-register {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: var(--transition);
}

.btn-register svg {
    width: 18px;
    height: 18px;
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 0 80px;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(124, 58, 237, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(6, 182, 212, 0.2) 0%, transparent 40%),
        radial-gradient(ellipse at 60% 80%, rgba(245, 158, 11, 0.15) 0%, transparent 40%);
}

.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-title span {
    color: var(--primary-light);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 35px;
    line-height: 1.7;
}

.hero-subtitle strong {
    color: var(--primary-light);
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn svg {
    width: 20px;
    height: 20px;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.4);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Hero Image - Phone Mockup */
.hero-image {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: linear-gradient(145deg, #2d2d3a, #1a1a24);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 
        0 50px 100px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--dark) 0%, var(--dark-secondary) 100%);
    border-radius: 30px;
    overflow: hidden;
}

.app-preview {
    padding: 40px 15px 15px;
}

.app-header {
    height: 30px;
    background: var(--primary);
    border-radius: 8px;
    margin-bottom: 20px;
}

.app-card {
    height: 80px;
    background: var(--card-bg);
    border-radius: 10px;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: clamp(28px, 4vw, 36px);
    font-weight: 700;
    margin-bottom: 15px;
}

.section-title span {
    color: var(--primary-light);
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
}

/* ===== Platform Intro Section ===== */
.platform-intro {
    padding: 100px 0;
    background: var(--dark);
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.intro-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    transition: var(--transition);
}

.intro-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 40px rgba(124, 58, 237, 0.15);
}

.intro-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.intro-icon svg {
    width: 26px;
    height: 26px;
}

.intro-icon.blue { background: linear-gradient(135deg, #3b82f6, #1d4ed8); color: white; }
.intro-icon.purple { background: linear-gradient(135deg, #8b5cf6, #6d28d9); color: white; }
.intro-icon.green { background: linear-gradient(135deg, #10b981, #059669); color: white; }
.intro-icon.orange { background: linear-gradient(135deg, #f59e0b, #d97706); color: white; }

.intro-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.intro-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== Why Choose Us Section ===== */
.why-choose {
    padding: 100px 0;
    background: var(--dark-secondary);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.why-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    transition: var(--transition);
}

.why-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.why-card.featured {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(139, 92, 246, 0.1));
    border-color: var(--primary);
}

.why-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.why-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.why-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.why-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== Services Section ===== */
.services {
    padding: 100px 0;
    background: var(--dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.service-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.service-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.service-image svg,
.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.service-card h3 {
    font-size: 18px;
    padding: 20px 20px 10px;
}

.service-card p {
    font-size: 14px;
    color: var(--text-muted);
    padding: 0 20px 20px;
    line-height: 1.6;
}

/* ===== Security Section ===== */
.security {
    padding: 100px 0;
    background: var(--dark-secondary);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.security-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.security-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.security-layer {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.security-tags {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.security-tags .tag {
    padding: 6px 14px;
    background: rgba(124, 58, 237, 0.2);
    border: 1px solid var(--primary);
    border-radius: 20px;
    font-size: 13px;
    color: var(--primary-light);
}

.security-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== App Updates / Timeline Section ===== */
.app-updates {
    padding: 100px 0;
    background: var(--dark);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 30px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -35px;
    top: 5px;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--dark);
}

.timeline-date {
    font-size: 13px;
    color: var(--primary-light);
    margin-bottom: 10px;
}

.timeline-title {
    font-size: 18px;
    margin-bottom: 12px;
}

.timeline-list {
    list-style: none;
    padding: 0;
}

.timeline-list li {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

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

.timeline-footer {
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 30px;
}

/* ===== Testimonials Section ===== */
.testimonials {
    padding: 100px 0;
    background: var(--dark-secondary);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.testimonial-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    transition: var(--transition);
}

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

.testimonial-card blockquote {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 45px;
    height: 45px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 18px;
}

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

.author-info strong {
    font-size: 15px;
    color: var(--text-primary);
}

.author-info span {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== News Section - List Style ===== */
.news {
    padding: 100px 0;
    background: var(--dark);
}

.news-list {
    max-width: 900px;
    margin: 0 auto;
}

.news-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 25px 0;
    border-bottom: 1px solid var(--border-color);
    gap: 20px;
}

.news-item:last-child {
    border-bottom: none;
}

.news-content {
    flex: 1;
}

.news-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 1.4;
}

.news-date {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.news-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    flex-shrink: 0;
    padding: 10px 20px;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.news-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(124, 58, 237, 0.3);
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-secondary);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.footer-logo .logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-light);
}

.footer-logo span {
    font-size: 20px;
    font-weight: 700;
}

.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-contact p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.footer-contact a {
    color: var(--primary-light);
    text-decoration: none;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--dark-secondary);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .btn-register {
        display: none;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
        max-width: 300px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .news-item {
        flex-direction: column;
    }
    
    .news-link {
        align-self: flex-start;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .timeline {
        padding-left: 20px;
    }
    
    .timeline-item {
        padding-left: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .section-header {
        margin-bottom: 30px;
    }
    
    .platform-intro,
    .why-choose,
    .services,
    .security,
    .app-updates,
    .testimonials,
    .news {
        padding: 60px 0;
    }
}