/* ============================================
   西安今日在线网络科技 - 主样式表
   设计风格：大气科技感 + 3D动态效果
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --primary-glow: rgba(0, 212, 255, 0.3);
    --accent: #7b61ff;
    --accent-glow: rgba(123, 97, 255, 0.3);
    --gradient: linear-gradient(135deg, #00d4ff 0%, #7b61ff 100%);
    --gradient-2: linear-gradient(135deg, #0a0e27 0%, #1a1040 50%, #0d1b2a 100%);
    --bg-dark: #060b18;
    --bg-card: rgba(15, 20, 40, 0.8);
    --bg-card-hover: rgba(20, 30, 60, 0.9);
    --text: #e8eaf6;
    --text-muted: #8892b0;
    --text-light: #ccd6f6;
    --border: rgba(100, 120, 200, 0.15);
    --border-glow: rgba(0, 212, 255, 0.2);
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
    --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-en: 'Inter', 'Noto Sans SC', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-cn);
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-cn); line-height: 1.3; font-weight: 700; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 3D Particle Background ---------- */
.particle-bg {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: -1;
    overflow: hidden;
    background: radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(123, 97, 255, 0.05) 0%, transparent 50%),
                var(--bg-dark);
}
.particle-bg canvas { display: block; }

/* Grid Overlay */
.particle-bg::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
    pointer-events: none;
}
@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

/* ---------- Header / Navigation ---------- */
.header {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    z-index: 1000;
    padding: 18px 0;
    transition: var(--transition);
    backdrop-filter: blur(0px);
    background: transparent;
}
.header.scrolled {
    padding: 10px 0;
    background: rgba(6, 11, 24, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glow);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1001;
}
.nav-logo-img {
    height: 36px;
    width: auto;
    object-fit: contain;
    border-radius: 6px;
}
.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-link {
    color: var(--text-muted);
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: 8px;
    position: relative;
    transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.08);
}
.nav-btn {
    display: inline-flex;
    align-items: center;
    padding: 10px 24px;
    background: var(--gradient);
    color: #fff;
    font-weight: 600;
    border-radius: 50px;
    font-size: 0.9rem;
    margin-left: 8px;
    box-shadow: 0 4px 15px var(--primary-glow);
    transition: var(--transition);
}
.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--primary-glow);
    color: #fff;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ---------- Hero Section ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 20px 80px;
    position: relative;
    perspective: 1000px;
}
.hero-content {
    max-width: 800px;
    animation: heroFadeIn 1s ease-out;
    transform-style: preserve-3d;
}
@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(40px) rotateX(5deg); }
    to { opacity: 1; transform: translateY(0) rotateX(0); }
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 24px;
    animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.2); }
    50% { box-shadow: 0 0 0 10px rgba(0, 212, 255, 0); }
}
.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}
.hero-title .highlight {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}
.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-muted);
    margin-bottom: 40px;
    font-weight: 300;
}
.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: var(--font-cn);
    text-decoration: none;
}
.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 4px 20px var(--primary-glow);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px var(--primary-glow);
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid rgba(0, 212, 255, 0.4);
}
.btn-outline:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
}

/* ---------- Section Common ---------- */
.section {
    padding: 100px 0;
    position: relative;
}
.section-header {
    text-align: center;
    margin-bottom: 60px;
}
.section-label {
    display: inline-block;
    font-size: 0.85rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 12px;
    font-weight: 600;
}
.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    margin-bottom: 16px;
}
.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ---------- 3D Card Effect ---------- */
.card-3d {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    transform-style: preserve-3d;
    backdrop-filter: blur(10px);
}
.card-3d::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}
.card-3d:hover {
    border-color: var(--border-glow);
    transform: translateY(-8px) rotateX(2deg);
    box-shadow: var(--shadow-glow);
}
.card-3d:hover::before { opacity: 1; }

/* ---------- Product Cards ---------- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.product-card {
    text-align: center;
    padding: 40px 28px;
}
.product-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
    animation-delay: var(--delay, 0s);
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.product-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}
.product-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.8;
}
.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}
.product-features span {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--primary);
}

/* ---------- About Section ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-content h3 {
    font-size: 1.6rem;
    margin-bottom: 20px;
}
.about-content p {
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.9;
}
.about-visual {
    position: relative;
    perspective: 1000px;
}
.about-3d-box {
    width: 100%;
    aspect-ratio: 1;
    background: var(--gradient-2);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transform-style: preserve-3d;
    animation: rotate3d 15s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}
@keyframes rotate3d {
    0% { transform: rotateY(0deg) rotateX(0deg); }
    25% { transform: rotateY(5deg) rotateX(3deg); }
    50% { transform: rotateY(0deg) rotateX(0deg); }
    75% { transform: rotateY(-5deg) rotateX(-3deg); }
    100% { transform: rotateY(0deg) rotateX(0deg); }
}
.about-3d-box .orbit-ring {
    position: absolute;
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 50%;
    animation: orbit 10s linear infinite;
}
.about-3d-box .orbit-ring:nth-child(1) { width: 70%; height: 70%; animation-duration: 8s; }
.about-3d-box .orbit-ring:nth-child(2) { width: 50%; height: 50%; animation-duration: 6s; animation-direction: reverse; }
.about-3d-box .orbit-ring:nth-child(3) { width: 30%; height: 30%; animation-duration: 4s; }
@keyframes orbit {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.about-3d-box .center-icon {
    font-size: 4rem;
    z-index: 1;
    animation: float 3s ease-in-out infinite;
}

/* ---------- Stats Bar ---------- */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
}
.stat-item {
    text-align: center;
    padding: 24px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}
.stat-item:hover {
    border-color: var(--border-glow);
    transform: scale(1.05);
}
.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-en);
}
.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ---------- Advantages Section ---------- */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}
.advantage-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 28px;
}
.advantage-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 12px;
    border: 1px solid rgba(0, 212, 255, 0.15);
}
.advantage-card h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}
.advantage-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ---------- Articles Section ---------- */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}
.article-card {
    overflow: hidden;
    padding: 0;
    cursor: pointer;
}
.article-card-img {
    width: 100%;
    height: 200px;
    background: var(--gradient-2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    position: relative;
    overflow: hidden;
}
.article-card-img::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%; height: 50%;
    background: linear-gradient(to top, var(--bg-card), transparent);
}
.article-card-body {
    padding: 24px;
}
.article-card-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}
.article-card-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}
.article-card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-card h3 a { color: var(--text); }
.article-card h3 a:hover { color: var(--primary); }
.article-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-tag {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--primary);
    margin-top: 12px;
}

/* ---------- Contact Section ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}
.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.contact-info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.contact-info-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 12px;
    font-size: 1.3rem;
    flex-shrink: 0;
}
.contact-info-item h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}
.contact-info-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
}
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
    backdrop-filter: blur(10px);
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.95rem;
    font-family: var(--font-cn);
    transition: var(--transition);
    outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}
.form-group textarea {
    min-height: 120px;
    resize: vertical;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ---------- Pagination ---------- */
.pagination {
    margin-top: 40px;
    text-align: center;
}
.pagination ul {
    display: inline-flex;
    gap: 4px;
}
.pagination li a,
.pagination li span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}
.pagination li a:hover {
    border-color: var(--primary);
    color: var(--primary);
}
.pagination li.active a,
.pagination li.active span {
    background: var(--gradient);
    border-color: transparent;
    color: #fff;
}
.pagination li.disabled span {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ---------- Article Detail ---------- */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 120px 20px 80px;
}
.article-detail-header {
    margin-bottom: 40px;
}
.article-detail-header h1 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    margin-bottom: 16px;
    line-height: 1.4;
}
.article-meta-bar {
    display: flex;
    gap: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}
.article-detail-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    line-height: 1.9;
    font-size: 1rem;
}
.article-detail-content h2 {
    font-size: 1.4rem;
    margin: 32px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}
.article-detail-content h3 {
    font-size: 1.2rem;
    margin: 24px 0 12px;
}
.article-detail-content p {
    margin-bottom: 16px;
    color: var(--text-light);
}
.article-detail-content ul, .article-detail-content ol {
    padding-left: 24px;
    margin-bottom: 16px;
}
.article-detail-content li {
    list-style: disc;
    margin-bottom: 8px;
    color: var(--text-light);
}
.article-detail-content strong {
    color: var(--primary);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
    padding: 100px 20px 20px;
}
.breadcrumb-list {
    display: flex;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.breadcrumb-list a {
    color: var(--text-muted);
}
.breadcrumb-list a:hover { color: var(--primary); }
.breadcrumb-list .sep { color: var(--border); }

/* ---------- Products Page ---------- */
.page-hero {
    padding: 140px 20px 60px;
    text-align: center;
}
.page-hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    margin-bottom: 16px;
}
.page-hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ---------- Articles Page ---------- */
.articles-filter {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
.filter-btn {
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-cn);
}
.filter-btn:hover, .filter-btn.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 212, 255, 0.08);
}

/* ---------- Contact Page ---------- */
.contact-hero {
    padding: 140px 20px 40px;
    text-align: center;
}
.contact-section {
    padding: 40px 0 100px;
}

/* ---------- Footer ---------- */
.footer {
    position: relative;
    background: rgba(3, 5, 15, 0.95);
    border-top: 1px solid var(--border);
    padding: 60px 0 0;
}
.footer-glow {
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: var(--gradient);
    filter: blur(1px);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}
.footer-title {
    font-size: 1.1rem;
    margin-bottom: 12px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.footer-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.8;
}
.footer-subtitle {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--text-light);
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}
.footer-links a:hover {
    color: var(--primary);
    padding-left: 4px;
}
.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    color: var(--text-muted);
    font-size: 0.9rem;
}
.contact-icon {
    color: var(--primary);
    font-size: 1rem;
}
.footer-bottom {
    padding: 20px 0;
    text-align: center;
}
.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 4px;
}
.footer-bottom a {
    color: var(--text-muted);
}
.footer-bottom a:hover { color: var(--primary); }

/* ---------- Back to Top ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 15px var(--primary-glow);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.back-to-top:hover {
    transform: translateY(-3px);
}

/* ---------- Toast Notification ---------- */
.toast {
    position: fixed;
    top: 100px;
    right: 20px;
    padding: 14px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.9rem;
    z-index: 9999;
    animation: slideIn 0.3s ease-out, slideOut 0.3s ease-in 2.7s forwards;
    backdrop-filter: blur(10px);
}
.toast.success { border-left: 3px solid #00e676; }
.toast.error { border-left: 3px solid #ff5252; }
.toast.info { border-left: 3px solid var(--primary); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes slideOut { from { opacity: 1; } to { opacity: 0; transform: translateX(100%); } }

/* ---------- Scroll Reveal ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Loading Skeleton ---------- */
.skeleton {
    background: linear-gradient(90deg, var(--bg-card) 25%, rgba(255,255,255,0.05) 50%, var(--bg-card) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius);
}
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
    .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: 0; right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(6, 11, 24, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px 30px;
        gap: 4px;
        transition: right 0.3s ease;
        border-left: 1px solid var(--border);
    }
    .nav-menu.open { right: 0; }
    .nav-link { width: 100%; padding: 12px 16px; font-size: 1rem; }
    .nav-btn { margin-left: 0; margin-top: 12px; text-align: center; }
    .hero-title { font-size: clamp(1.8rem, 6vw, 2.5rem); }
    .section { padding: 60px 0; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); }
    .articles-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .article-detail-content { padding: 24px; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .btn { width: 100%; justify-content: center; }
}

/* ---------- Admin Styles ---------- */
.admin-login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    padding: 20px;
}
.admin-login-box {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(10px);
}
.admin-login-box h2 {
    text-align: center;
    margin-bottom: 8px;
    font-size: 1.5rem;
}
.admin-login-box .subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 30px;
}
.admin-login-box .form-group { margin-bottom: 16px; }
.admin-login-box .btn { width: 100%; justify-content: center; margin-top: 8px; }

/* Alert message */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 0.9rem;
}
.alert-danger { background: rgba(255, 82, 82, 0.1); border: 1px solid rgba(255, 82, 82, 0.2); color: #ff5252; }
.alert-success { background: rgba(0, 230, 118, 0.1); border: 1px solid rgba(0, 230, 118, 0.2); color: #00e676; }
.alert-info { background: rgba(0, 212, 255, 0.1); border: 1px solid rgba(0, 212, 255, 0.2); color: var(--primary); }