/* ============================================================
   欧交易所APP - 主样式表
   Web3多链数字钱包 / 跨链转账主题
   配色: 深色背景(#0d1117) + 渐变紫蓝(#6c5ce7→#3b82f6) + 亮色点缀(#00d4aa)
   ============================================================ */

/* ===== CSS Variables ===== */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2333;
    --bg-card-hover: #212a3d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-purple: #6c5ce7;
    --accent-blue: #3b82f6;
    --accent-teal: #00d4aa;
    --border-color: #30363d;
    --border-light: #21262d;
    --gradient-primary: linear-gradient(135deg, #6c5ce7 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #3b82f6 0%, #00d4aa 100%);
    --gradient-hero: linear-gradient(160deg, #0d1117 0%, #161b22 40%, #1a1040 70%, #0d1117 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(108, 92, 231, 0.3);
    --shadow-glow-teal: 0 0 20px rgba(0, 212, 170, 0.3);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --max-width: 1200px;
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

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

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

a:hover {
    color: var(--accent-teal);
}

ul, ol {
    list-style: none;
}

/* ===== Header & Navigation ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    transition: background var(--transition-normal);
}

header.scrolled {
    background: rgba(13, 17, 23, 0.95);
    box-shadow: var(--shadow-md);
}

header nav {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 24px;
}

.brand {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: rgba(108, 92, 231, 0.12);
}

.nav-download-btn {
    background: var(--gradient-primary) !important;
    color: #fff !important;
    padding: 8px 20px !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600 !important;
    transition: all var(--transition-fast) !important;
}

.nav-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    color: #fff !important;
}

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

.menu-toggle span {
    display: block;
    width: 26px;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

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

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

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

/* ===== Hero Section ===== */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    padding: calc(var(--header-height) + 40px) 24px 60px;
}

#hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

#hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 212, 170, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-container {
    max-width: var(--max-width);
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 580px;
}

.hero-content .hero-badge {
    display: inline-block;
    background: rgba(108, 92, 231, 0.15);
    color: var(--accent-purple);
    padding: 6px 16px;
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(108, 92, 231, 0.3);
}

.hero-content h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #e6edf3 0%, #a5b4fc 50%, #6c5ce7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.hero-content .hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-primary);
    color: #fff;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 1.05rem;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-glow);
    text-decoration: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(108, 92, 231, 0.45);
    color: #fff;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-primary);
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 1.05rem;
    font-weight: 600;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-secondary:hover {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
    transform: translateY(-3px);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 420px;
    filter: drop-shadow(0 0 40px rgba(108, 92, 231, 0.3));
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* ===== Features Section ===== */
#features {
    padding: 100px 24px;
    background: var(--bg-secondary);
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}

.features-grid article {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.features-grid article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.features-grid article:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-purple);
}

.features-grid article:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: rgba(108, 92, 231, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    color: var(--accent-purple);
    transition: all var(--transition-fast);
}

.features-grid article:hover .feature-icon {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: var(--shadow-glow);
}

.features-grid article h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

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

/* ===== Stats Section ===== */
#stats {
    padding: 80px 24px;
    background: var(--bg-primary);
    position: relative;
}

.stats-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 28px;
    text-align: center;
}

.stat-item {
    padding: 32px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.stat-item:hover {
    border-color: var(--accent-teal);
    box-shadow: var(--shadow-glow-teal);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 800;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== CTA Section ===== */
#cta {
    padding: 100px 24px;
    background: linear-gradient(160deg, var(--bg-secondary) 0%, #1a1040 50%, var(--bg-secondary) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

#cta::before {
    content: '';
    position: absolute;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.cta-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
}

.cta-content .btn-primary {
    font-size: 1.15rem;
    padding: 16px 40px;
}

/* ===== Page Hero (Sub Pages) ===== */
.page-hero {
    padding: calc(var(--header-height) + 60px) 24px 60px;
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.page-hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #e6edf3 0%, #a5b4fc 60%, #6c5ce7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
}

.page-hero p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.breadcrumb {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
    position: relative;
    z-index: 1;
}

.breadcrumb a {
    color: var(--accent-blue);
}

.breadcrumb span {
    color: var(--text-secondary);
}

/* ===== About Page Styles ===== */
.about-section {
    padding: 80px 24px;
    max-width: var(--max-width);
    margin: 0 auto;
}

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

.about-grid.reverse {
    direction: rtl;
}

.about-grid.reverse > * {
    direction: ltr;
}

.about-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-text .highlight {
    color: var(--accent-teal);
    font-weight: 600;
}

.about-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Timeline */
.timeline-section {
    padding: 80px 24px 100px;
    background: var(--bg-secondary);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 48px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
    padding-right: calc(50% + 40px);
    text-align: right;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
    padding-left: calc(50% + 40px);
    text-align: left;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 8px;
    width: 16px;
    height: 16px;
    background: var(--accent-purple);
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: var(--shadow-glow);
    z-index: 1;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    transition: all var(--transition-fast);
}

.timeline-content:hover {
    border-color: var(--accent-purple);
    box-shadow: var(--shadow-md);
}

.timeline-year {
    font-size: 0.9rem;
    color: var(--accent-teal);
    font-weight: 700;
    margin-bottom: 6px;
}

.timeline-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.timeline-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Team Grid */
.team-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 28px;
}

.team-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    transition: all var(--transition-normal);
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-purple);
}

.team-card img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 16px;
    border: 3px solid var(--accent-purple);
}

.team-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.team-card .role {
    color: var(--accent-teal);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.team-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Security Grid */
.security-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.security-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition-fast);
    border-left: 4px solid var(--accent-teal);
}

.security-card:hover {
    box-shadow: var(--shadow-md);
}

.security-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.security-card p {
    font-size: 0.93rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== Services Page Styles ===== */
.services-list {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.service-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition-normal);
    align-items: start;
}

.service-item:hover {
    transform: translateX(8px);
    border-color: var(--accent-purple);
    box-shadow: var(--shadow-lg);
}

.service-icon-wrapper {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    background: rgba(108, 92, 231, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.service-details h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-details p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.service-features-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.service-features-list li {
    background: rgba(108, 92, 231, 0.1);
    color: var(--accent-purple);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===== FAQ Page Styles ===== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-list details {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    overflow: hidden;
}

.faq-list details:hover {
    border-color: var(--accent-purple);
}

.faq-list details[open] {
    border-color: var(--accent-purple);
    box-shadow: var(--shadow-md);
}

.faq-list summary {
    padding: 20px 24px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
    color: var(--text-primary);
    user-select: none;
}

.faq-list summary::-webkit-details-marker {
    display: none;
}

.faq-list summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent-purple);
    font-weight: 300;
    transition: transform var(--transition-fast);
}

.faq-list details[open] summary::after {
    content: '−';
    transform: rotate(180deg);
}

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

.faq-categories {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.faq-cat {
    padding: 8px 20px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    background: transparent;
}

.faq-cat:hover,
.faq-cat.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
}

/* ===== Contact Page Styles ===== */
.contact-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.contact-form-wrapper h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color var(--transition-fast);
    outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
    border-color: var(--accent-purple);
    box-shadow: var(--shadow-glow);
}

.contact-form textarea {
    min-height: 140px;
    resize: vertical;
}

.contact-form .btn-primary {
    width: 100%;
    justify-content: center;
    cursor: pointer;
}

.contact-info-sidebar > div {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 20px;
    transition: all var(--transition-fast);
}

.contact-info-sidebar > div:hover {
    border-color: var(--accent-purple);
}

.contact-info-sidebar h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.contact-info-sidebar p {
    font-size: 0.93rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(108, 92, 231, 0.1);
    border-radius: var(--radius-sm);
    color: var(--accent-purple);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: #fff;
}

/* ===== Footer ===== */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 60px 24px 30px;
}

.footer-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-col p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col ul a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-col ul a:hover {
    color: var(--accent-teal);
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-container {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-content h1 {
        font-size: 2.4rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        flex-direction: row;
        padding-left: 56px;
        padding-right: 0;
        text-align: left;
    }

    .timeline-dot {
        left: 20px;
    }

    .service-item {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(13, 17, 23, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 4px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-normal);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-links a {
        display: block;
        padding: 12px 16px;
        font-size: 1rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .page-hero h1 {
        font-size: 2rem;
    }

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

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .service-item {
        padding: 24px;
    }

    .contact-form-wrapper {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.7rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

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

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .faq-list summary {
        font-size: 0.95rem;
        padding: 16px 20px;
    }
}