/* ========================================
   黑客天眼GPS定位 - 主样式表
   Dark Cyberpunk Theme
   ======================================== */

/* CSS Variables */
:root {
    --primary: #00FF41;
    --primary-dim: #00cc34;
    --primary-glow: rgba(0, 255, 65, 0.3);
    --primary-glow-strong: rgba(0, 255, 65, 0.5);
    --bg-dark: #000000;
    --bg-card: #0a0a0a;
    --bg-card-hover: #111111;
    --bg-section-alt: #050505;
    --text-primary: #E0E0E0;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    --border-color: #1F1F1F;
    --border-hover: #2a2a2a;
    --cyan: #00FFFF;
    --magenta: #FF00FF;
    --gradient-primary: linear-gradient(135deg, #00FF41, #00FFFF);
    --font-heading: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "STHeiti", "WenQuanYi Micro Hei", sans-serif;
    --font-body: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans CN", sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Consolas", "Microsoft YaHei", monospace;
    --max-width: 1200px;
    --nav-height: 72px;
    --transition-fast: 150ms ease-out;
    --transition-normal: 250ms ease-out;
    --transition-slow: 400ms ease-out;
}

/* Reset & Base */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: #ffffff;
}

/* Utility */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 80px 0;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 16px;
    position: relative;
}

.section-title .highlight {
    color: var(--primary);
    text-shadow: 0 0 20px var(--primary-glow);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 640px;
    margin: 0 auto 48px;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    height: var(--nav-height);
    transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.95);
    box-shadow: 0 4px 30px rgba(0, 255, 65, 0.05);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.2rem;
    color: #fff;
    cursor: pointer;
    text-decoration: none;
}

.nav-logo svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
    filter: drop-shadow(0 0 6px var(--primary-glow));
}

.nav-logo span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-normal);
}

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

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

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--primary);
    color: #000 !important;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
}

.nav-cta:hover {
    background: #33ff66;
    box-shadow: 0 0 20px var(--primary-glow);
    color: #000 !important;
    transform: translateY(-1px);
}

.nav-cta svg {
    width: 16px;
    height: 16px;
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    overflow: hidden;
}

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

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.15;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.8) 60%, #000 100%);
}

/* Grid overlay */
.hero-grid {
    position: absolute;
    inset: 0;
    z-index: 1;
    background-image:
        linear-gradient(rgba(0, 255, 65, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 65, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 60px 20px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 255, 65, 0.08);
    border: 1px solid rgba(0, 255, 65, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 28px;
    font-family: var(--font-mono);
}

.hero-badge svg {
    width: 16px;
    height: 16px;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero h1 .text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: var(--primary);
    color: #000;
    font-weight: 700;
    font-size: 1.05rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
    font-family: var(--font-heading);
}

.btn-primary:hover {
    background: #33ff66;
    box-shadow: 0 0 30px var(--primary-glow-strong), 0 0 60px var(--primary-glow);
    transform: translateY(-2px);
    color: #000;
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: transparent;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.05rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
    text-decoration: none;
    font-family: var(--font-heading);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 255, 65, 0.05);
}

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

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

.hero-stat .stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    font-family: var(--font-mono);
    text-shadow: 0 0 20px var(--primary-glow);
}

.hero-stat .stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ========================================
   Value Proposition / Why Choose Us
   ======================================== */
.value-section {
    background: var(--bg-section-alt);
    position: relative;
}

.value-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.value-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 36px 28px;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.value-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.value-card:hover::before {
    opacity: 1;
}

.value-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 65, 0.08);
    border: 1px solid rgba(0, 255, 65, 0.15);
    border-radius: 14px;
    margin-bottom: 20px;
    transition: all var(--transition-normal);
}

.value-card:hover .value-icon {
    background: rgba(0, 255, 65, 0.12);
    box-shadow: 0 0 20px var(--primary-glow);
}

.value-icon svg {
    width: 28px;
    height: 28px;
    color: var(--primary);
}

.value-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.value-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========================================
   About Section
   ======================================== */
.about-section {
    position: relative;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.about-image:hover img {
    transform: scale(1.03);
}

.about-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.1), transparent);
    pointer-events: none;
}

.about-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    text-align: left;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1rem;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 28px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.about-feature:hover {
    border-color: rgba(0, 255, 65, 0.3);
    background: rgba(0, 255, 65, 0.05);
}

.about-feature svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
    flex-shrink: 0;
}

/* ========================================
   Testimonials
   ======================================== */
.testimonials-section {
    background: var(--bg-section-alt);
    position: relative;
}

.testimonials-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px 28px;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.testimonial-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.testimonial-stars {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.testimonial-stars svg {
    width: 18px;
    height: 18px;
    color: #FFD700;
    fill: #FFD700;
}

.testimonial-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(0, 255, 65, 0.1);
    border: 2px solid rgba(0, 255, 65, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--primary);
    font-size: 1rem;
    flex-shrink: 0;
}

.testimonial-info .name {
    font-weight: 600;
    color: #fff;
    font-size: 0.95rem;
}

.testimonial-info .role {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ========================================
   FAQ Section
   ======================================== */
.faq-section {
    position: relative;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

.faq-item.active {
    border-color: rgba(0, 255, 65, 0.2);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    color: #fff;
    gap: 16px;
    transition: color var(--transition-fast);
    user-select: none;
}

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

.faq-question svg {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform var(--transition-normal), color var(--transition-fast);
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
    color: var(--primary);
}

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

.faq-answer-inner {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ========================================
   SEO Content Section
   ======================================== */
.seo-section {
    background: var(--bg-section-alt);
    position: relative;
}

.seo-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
}

.seo-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.seo-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px 28px;
    transition: all var(--transition-normal);
}

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

.seo-card h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.seo-card h3 svg {
    width: 22px;
    height: 22px;
    color: var(--primary);
}

.seo-card p {
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.8;
}

/* CTA Banner */
.cta-banner {
    margin-top: 48px;
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.08), rgba(0, 255, 255, 0.05));
    border: 1px solid rgba(0, 255, 65, 0.15);
    border-radius: 20px;
    padding: 48px 40px;
    text-align: center;
}

.cta-banner h3 {
    font-size: 1.6rem;
    margin-bottom: 16px;
}

.cta-banner p {
    color: var(--text-secondary);
    margin-bottom: 28px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    padding: 48px 0 24px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.footer-brand {
    max-width: 360px;
}

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.7;
}

.footer-links {
    display: flex;
    gap: 48px;
}

.footer-col h4 {
    font-size: 0.95rem;
    color: #fff;
    margin-bottom: 16px;
    font-weight: 600;
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    font-size: 0.88rem;
    padding: 4px 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.82rem;
}

.footer-keywords {
    color: var(--text-muted);
    font-size: 0.78rem;
    max-width: 600px;
    line-height: 1.6;
}

/* ========================================
   Scroll Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ========================================
   Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
    .fade-in {
        opacity: 1;
        transform: none;
    }
}

/* ========================================
   Responsive - Tablet
   ======================================== */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .value-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid {
        gap: 40px;
    }

    .hero-stats {
        gap: 32px;
    }
}

/* ========================================
   Responsive - Mobile
   ======================================== */
@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .section-padding {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .section-subtitle {
        font-size: 0.95rem;
        margin-bottom: 36px;
    }

    /* Nav Mobile */
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.98);
        flex-direction: column;
        justify-content: flex-start;
        padding: 32px 24px;
        gap: 0;
        transform: translateX(100%);
        transition: transform var(--transition-normal);
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-links a {
        font-size: 1.1rem;
        padding: 16px 0;
        border-bottom: 1px solid var(--border-color);
        width: 100%;
    }

    .nav-links a::after {
        display: none;
    }

    .nav-links .nav-cta {
        margin-top: 16px;
        width: 100%;
        justify-content: center;
        padding: 14px 24px;
    }

    .mobile-toggle {
        display: flex;
    }

    /* Hero Mobile */
    .hero {
        min-height: auto;
        padding-top: calc(var(--nav-height) + 40px);
        padding-bottom: 40px;
    }

    .hero .container {
        padding: 40px 20px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

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

    .hero-actions {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
        margin-top: 40px;
        padding-top: 28px;
    }

    /* Value Grid Mobile */
    .value-grid {
        grid-template-columns: 1fr;
    }

    /* About Mobile */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-image {
        order: -1;
    }

    .about-image img {
        height: 260px;
    }

    .about-content h2 {
        font-size: 1.6rem;
        text-align: center;
    }

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

    /* Testimonials Mobile */
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    /* SEO Grid Mobile */
    .seo-grid {
        grid-template-columns: 1fr;
    }

    .cta-banner {
        padding: 32px 24px;
    }

    .cta-banner h3 {
        font-size: 1.3rem;
    }

    /* Footer Mobile */
    .footer-top {
        flex-direction: column;
        gap: 32px;
    }

    .footer-links {
        flex-direction: column;
        gap: 24px;
    }

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

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

/* ========================================
   Responsive - Small Mobile
   ======================================== */
@media (max-width: 380px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-badge {
        font-size: 0.75rem;
        padding: 6px 14px;
    }

    .container {
        padding: 0 16px;
    }
}