/* ========================================
   Trust Wallet 官网 - 亲和引导风 (方案B)
   温暖色调 · 圆润设计 · 友好引导
   ======================================== */

/* CSS Variables */
:root {
    /* 温暖色系 */
    --orange-600: #EA580C;
    --orange-500: #F97316;
    --orange-400: #FB923C;
    --orange-300: #FDBA74;
    --orange-200: #FED7AA;
    --orange-100: #FFEDD5;
    --orange-50: #FFF7ED;
    
    /* 暖灰色系 */
    --warm-900: #292524;
    --warm-800: #44403C;
    --warm-700: #57534E;
    --warm-600: #78716C;
    --warm-500: #A8A29E;
    --warm-400: #D6D3D1;
    --warm-300: #E7E5E4;
    --warm-200: #F5F5F4;
    --warm-100: #FAFAF9;
    --white: #FFFFFF;
    
    /* 功能色 */
    --success: #22C55E;
    --warning: #EAB308;
    --error: #EF4444;
    --info: #3B82F6;
    
    /* 渐变 */
    --gradient-warm: linear-gradient(135deg, var(--orange-500) 0%, var(--orange-400) 100%);
    --gradient-soft: linear-gradient(180deg, var(--orange-50) 0%, var(--white) 100%);
    --gradient-hero: linear-gradient(135deg, #FFF7ED 0%, #FFEDD5 50%, #FFF 100%);
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.08);
    --shadow-warm: 0 10px 30px rgba(249, 115, 22, 0.2);
    
    /* 字体 */
    --font-display: 'Nunito', sans-serif;
    --font-body: 'Noto Sans SC', sans-serif;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition: 0.3s ease;
    --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--warm-800);
    background: var(--warm-100);
    -webkit-font-smoothing: antialiased;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    transition: box-shadow var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--warm-900);
}

.logo img {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
}

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

.nav-desktop a {
    font-weight: 600;
    color: var(--warm-600);
    transition: color var(--transition);
}

.nav-desktop a:hover {
    color: var(--orange-500);
}

.nav-cta-desktop {
    background: var(--gradient-warm);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-weight: 700;
    box-shadow: var(--shadow-warm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.nav-cta-desktop:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 35px rgba(249, 115, 22, 0.3);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: var(--orange-50);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--orange-500);
    border-radius: 2px;
    transition: all var(--transition);
}

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

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

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

/* Mobile Menu Elements - Hidden on Desktop */
.nav-menu-header,
.nav-menu-footer,
.nav-divider,
.nav-icon,
.nav-close-btn,
.nav-overlay,
.nav-menu {
    display: none;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-full);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-icon {
    font-size: 1.2rem;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 35px rgba(249, 115, 22, 0.35);
}

.btn-bounce {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
    60% { transform: translateY(-4px); }
}

.btn-secondary {
    background: var(--white);
    color: var(--orange-500);
    border: 2px solid var(--orange-200);
}

.btn-secondary:hover {
    background: var(--orange-50);
    border-color: var(--orange-300);
}

.btn-light {
    background: var(--white);
    color: var(--orange-500);
}

.btn-light:hover {
    background: var(--orange-50);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 1.1rem;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    padding: 120px 24px 80px;
    background: var(--gradient-hero);
    overflow: hidden;
}

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

.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

.float-icon {
    position: absolute;
    font-size: 3rem;
    opacity: 0.15;
    animation: float 6s ease-in-out infinite;
}

.float-1 { top: 15%; left: 5%; animation-delay: 0s; }
.float-2 { top: 25%; right: 10%; animation-delay: 1.5s; }
.float-3 { bottom: 30%; left: 8%; animation-delay: 3s; }
.float-4 { bottom: 20%; right: 5%; animation-delay: 4.5s; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

.hero-wave {
    font-size: 3rem;
    display: inline-block;
    animation: wave 1.5s ease-in-out infinite;
    margin-bottom: 16px;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(20deg); }
    75% { transform: rotate(-10deg); }
}

.hero-badge {
    display: inline-block;
    padding: 10px 20px;
    background: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--orange-500);
    margin-bottom: 20px;
    box-shadow: var(--shadow-md);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 3.8rem);
    font-weight: 800;
    color: var(--warm-900);
    line-height: 1.15;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--warm-600);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-subtitle strong {
    color: var(--orange-500);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-trust {
    display: flex;
    align-items: center;
    gap: 16px;
}

.trust-avatars {
    display: flex;
    align-items: center;
}

.trust-avatars .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 3px solid var(--white);
    margin-left: -12px;
    object-fit: cover;
}

.trust-avatars .avatar:first-child {
    margin-left: 0;
}

.avatar-more {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--orange-500);
    color: var(--white);
    font-size: 0.7rem;
    font-weight: 700;
    margin-left: -12px;
    border: 3px solid var(--white);
}

.trust-text {
    font-size: 0.9rem;
    color: var(--warm-600);
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    width: 280px;
    height: 560px;
    background: var(--warm-900);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl), 0 30px 60px rgba(0, 0, 0, 0.15);
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 24px;
    background: var(--warm-800);
    border-radius: 20px;
}

.phone-mockup img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 32px;
}

.hero-tip {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--white);
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--warm-700);
    white-space: nowrap;
    animation: tipBounce 3s ease-in-out infinite;
}

@keyframes tipBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-5px); }
}

.tip-icon {
    font-size: 1.2rem;
}

/* ========================================
   Section Header
   ======================================== */
section {
    padding: 100px 0;
}

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

.section-header.light {
    color: var(--white);
}

.section-header.light .section-desc {
    color: rgba(255, 255, 255, 0.85);
}

.section-emoji {
    font-size: 3rem;
    display: block;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    color: var(--warm-900);
    margin-bottom: 12px;
}

.section-header.light .section-title {
    color: var(--white);
}

.section-desc {
    font-size: 1.1rem;
    color: var(--warm-600);
}

/* ========================================
   Intro Section
   ======================================== */
.intro {
    background: var(--white);
}

.intro-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.intro-card {
    background: var(--warm-100);
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition);
}

.intro-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.intro-card h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--warm-900);
    margin-bottom: 12px;
}

.intro-card p {
    color: var(--warm-600);
    line-height: 1.8;
}

.intro-card strong {
    color: var(--orange-500);
}

.intro-highlight {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: linear-gradient(135deg, var(--orange-50) 0%, var(--orange-100) 100%);
    padding: 28px 32px;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--orange-500);
}

.highlight-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.highlight-content p {
    color: var(--warm-700);
    margin-bottom: 8px;
}

.highlight-content p:last-child {
    margin-bottom: 0;
}

.highlight-content strong {
    color: var(--warm-900);
}

/* ========================================
   Download Section
   ======================================== */
.download {
    background: var(--gradient-warm);
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.download .container {
    position: relative;
    z-index: 1;
}

.download-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.step {
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(255, 255, 255, 0.2);
    padding: 20px 28px;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--white);
    color: var(--orange-500);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 800;
    flex-shrink: 0;
}

.step-content h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 4px;
}

.step-content p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.85);
}

.step-arrow {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.5);
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--white);
    padding: 20px 28px;
    border-radius: var(--radius-lg);
    min-width: 220px;
    transition: all var(--transition);
}

.download-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.download-icon {
    font-size: 2.5rem;
}

.download-label {
    display: block;
    font-size: 0.8rem;
    color: var(--warm-500);
}

.download-name {
    display: block;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--warm-900);
}

.download-tip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.2);
    padding: 16px 24px;
    border-radius: var(--radius-full);
    max-width: fit-content;
    margin: 0 auto;
}

.download-tip p {
    color: var(--white);
    font-size: 0.95rem;
}

.download-tip a {
    color: var(--white);
    text-decoration: underline;
    font-weight: 600;
}

/* ========================================
   Guide Section
   ======================================== */
.guide {
    background: var(--warm-100);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.guide-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.guide-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.guide-header {
    position: relative;
    height: 160px;
    overflow: hidden;
}

.guide-header img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.guide-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--orange-500);
    color: var(--white);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
}

.guide-body {
    padding: 28px;
}

.guide-body h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--warm-900);
    margin-bottom: 20px;
}

.guide-steps {
    margin-bottom: 20px;
}

.mini-step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--warm-300);
    color: var(--warm-700);
    font-size: 0.95rem;
}

.mini-step:last-child {
    border-bottom: none;
}

.mini-step span {
    width: 24px;
    height: 24px;
    background: var(--orange-100);
    color: var(--orange-500);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

.guide-tips {
    background: var(--warm-100);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.guide-tips p {
    font-size: 0.9rem;
    color: var(--warm-700);
    margin-bottom: 8px;
}

.guide-tips p:last-child {
    margin-bottom: 0;
}

.guide-tips code {
    background: var(--orange-100);
    color: var(--orange-600);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
}

.guide-link {
    color: var(--orange-500);
    font-weight: 600;
    font-size: 0.95rem;
}

.guide-link:hover {
    color: var(--orange-600);
}

.guide-warning {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--white);
    padding: 28px 32px;
    border-radius: var(--radius-lg);
    border: 2px solid var(--warning);
}

.warning-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.warning-content h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--warm-900);
    margin-bottom: 12px;
}

.warning-list {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.warning-list span {
    background: var(--warm-100);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    color: var(--warm-700);
}

.warning-content p {
    color: var(--warm-600);
    font-size: 0.95rem;
}

.warning-content a {
    color: var(--orange-500);
    font-weight: 600;
}

/* ========================================
   FAQ Section
   ======================================== */
.faq {
    background: var(--white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 16px;
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--warm-100);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    text-align: left;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--warm-800);
    transition: all var(--transition);
}

.faq-question:hover {
    background: var(--orange-50);
    border-color: var(--orange-200);
}

.faq-item.active .faq-question {
    background: var(--orange-50);
    border-color: var(--orange-300);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.q-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.faq-toggle {
    margin-left: auto;
    width: 24px;
    height: 24px;
    position: relative;
    flex-shrink: 0;
}

.faq-toggle::before,
.faq-toggle::after {
    content: '';
    position: absolute;
    background: var(--orange-500);
    border-radius: 2px;
    transition: transform var(--transition);
}

.faq-toggle::before {
    width: 14px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-toggle::after {
    width: 2px;
    height: 14px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-item.active .faq-toggle::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

.faq-answer {
    display: none;
    padding: 24px 28px;
    background: var(--white);
    border: 2px solid var(--orange-300);
    border-top: none;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-answer p {
    color: var(--warm-700);
    margin-bottom: 12px;
    line-height: 1.8;
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

.faq-answer strong {
    color: var(--warm-900);
}

.faq-answer a {
    color: var(--orange-500);
    font-weight: 600;
}

/* ========================================
   Safety Section
   ======================================== */
.safety {
    background: var(--warm-100);
}

.safety-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.safety-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
}

.safety-card.do {
    border-top: 4px solid var(--success);
}

.safety-card.dont {
    border-top: 4px solid var(--error);
}

.safety-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.safety-icon {
    font-size: 2rem;
}

.safety-header h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--warm-900);
}

.safety-list {
    list-style: none;
}

.safety-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--warm-200);
    color: var(--warm-700);
    font-size: 0.95rem;
}

.safety-list li:last-child {
    border-bottom: none;
}

.safety-alert {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: linear-gradient(135deg, #FEF2F2 0%, #FEE2E2 100%);
    padding: 28px 32px;
    border-radius: var(--radius-lg);
    border: 2px solid var(--error);
}

.alert-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.alert-content h4 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--error);
    margin-bottom: 12px;
}

.alert-content p {
    color: var(--warm-700);
    margin-bottom: 8px;
}

.alert-content strong {
    color: var(--error);
}

.alert-content a {
    color: var(--orange-500);
    font-weight: 600;
}

/* ========================================
   About Section
   ======================================== */
.about {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 48px;
}

.about-story h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--warm-900);
    margin-bottom: 20px;
}

.about-story p {
    color: var(--warm-600);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-story strong {
    color: var(--warm-900);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 24px;
    background: var(--orange-50);
    border-radius: var(--radius-lg);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--orange-500);
}

.stat-unit {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--orange-500);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--warm-600);
    margin-top: 4px;
}

.about-badges {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.badge-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--warm-100);
    padding: 14px 24px;
    border-radius: var(--radius-full);
}

.badge-icon {
    font-size: 1.3rem;
}

.badge-item span:last-child {
    font-weight: 600;
    color: var(--warm-700);
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background: var(--warm-100);
    padding: 80px 0;
}

.contact-box {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
    background: var(--gradient-warm);
    padding: 60px;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.contact-emoji {
    font-size: 4rem;
    display: block;
    margin-bottom: 20px;
}

.contact-content h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
}

.contact-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: 24px;
}

.contact-features {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.contact-features span {
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    color: var(--white);
    font-size: 0.9rem;
}

.contact-image img {
    width: 100%;
    max-width: 300px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    margin: 0 auto;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--warm-900);
    color: var(--warm-400);
    padding: 60px 0 30px;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--warm-800);
    margin-bottom: 30px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.footer-brand img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.brand-name {
    display: block;
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
}

.brand-slogan {
    font-size: 0.85rem;
    color: var(--warm-500);
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--warm-400);
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--orange-400);
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
}

.footer-legal {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--warm-800);
    margin-bottom: 8px;
}

.footer-legal a {
    color: var(--warm-500);
    transition: color var(--transition);
}

.footer-legal a:hover {
    color: var(--orange-400);
}

.footer-bottom p a {
    color: var(--warm-500);
}

.footer-bottom a:hover {
    color: var(--orange-400);
}

.last-update {
    color: var(--warm-600);
}

/* ========================================
   Back to Top
   ======================================== */
.back-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 50px;
    height: 50px;
    background: var(--gradient-warm);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow-warm);
    z-index: 100;
}

.back-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-top:hover {
    transform: translateY(-4px);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-trust {
        justify-content: center;
    }
    
    .phone-mockup {
        width: 240px;
        height: 480px;
    }
    
    .intro-cards {
        grid-template-columns: 1fr;
    }
    
    .guide-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        justify-content: center;
    }
    
    .contact-box {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-features {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-desktop {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu-header {
        display: flex;
    }
    
    .nav-menu-footer {
        display: block;
    }
    
    .nav-divider {
        display: block;
    }
    
    .nav-icon {
        display: inline;
    }
    
    .nav-close-btn {
        display: flex;
    }
    
    .nav-menu {
        display: flex;
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        background: linear-gradient(180deg, var(--white) 0%, var(--orange-50) 100%);
        flex-direction: column;
        align-items: stretch;
        padding: 0;
        gap: 0;
        transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
        overflow-y: auto;
        z-index: 999;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu-header {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 28px 24px;
        background: var(--gradient-warm);
        color: var(--white);
        position: relative;
    }
    
    .nav-menu-header img {
        width: 48px;
        height: 48px;
        border-radius: var(--radius-md);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }
    
    .nav-menu-title {
        display: block;
        font-family: var(--font-display);
        font-size: 1.2rem;
        font-weight: 700;
    }
    
    .nav-menu-slogan {
        display: block;
        font-size: 0.75rem;
        opacity: 0.85;
        margin-top: 2px;
    }
    
    .nav-close-btn {
        position: absolute;
        top: 20px;
        right: 20px;
        width: 32px;
        height: 32px;
        background: rgba(255, 255, 255, 0.2);
        border: none;
        border-radius: var(--radius-sm);
        color: var(--white);
        font-size: 1rem;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all var(--transition);
    }
    
    .nav-close-btn:hover {
        background: rgba(255, 255, 255, 0.3);
    }
    
    .nav-divider {
        height: 1px;
        background: var(--warm-200);
        margin: 8px 24px;
    }
    
    .nav-menu li {
        list-style: none;
    }
    
    .nav-menu li a {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 16px 24px;
        color: var(--warm-700);
        font-size: 1rem;
        font-weight: 500;
        transition: all var(--transition);
        border-left: 3px solid transparent;
    }
    
    .nav-menu li a:hover,
    .nav-menu li a:active {
        background: var(--orange-50);
        color: var(--orange-500);
        border-left-color: var(--orange-500);
    }
    
    .nav-icon {
        font-size: 1.2rem;
        width: 28px;
        text-align: center;
    }
    
    .nav-menu .nav-cta {
        margin: 8px 24px;
        padding: 14px 20px;
        background: var(--orange-500);
        color: var(--white) !important;
        border-radius: var(--radius-md);
        justify-content: center;
        border-left: none !important;
        font-weight: 600;
        box-shadow: var(--shadow-warm);
    }
    
    .nav-menu .nav-cta:hover {
        background: var(--orange-400);
        transform: translateY(-1px);
    }
    
    .nav-menu-footer {
        margin-top: auto;
        padding: 20px 24px;
        background: var(--warm-100);
        border-top: 1px solid var(--warm-200);
    }
    
    .nav-menu-footer p {
        font-size: 0.8rem;
        color: var(--warm-500);
        margin-bottom: 10px;
    }
    
    .nav-badges {
        display: flex;
        gap: 12px;
    }
    
    .nav-badges span {
        font-size: 0.7rem;
        color: var(--warm-600);
        background: var(--white);
        padding: 4px 10px;
        border-radius: var(--radius-full);
        border: 1px solid var(--warm-200);
    }
    
    .nav-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 998;
        backdrop-filter: blur(2px);
    }
    
    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    section {
        padding: 64px 0;
    }
    
    .download-steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 300px;
    }
    
    .safety-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-top: 100px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
    }
    
    .hero-tip {
        font-size: 0.75rem;
        padding: 10px 16px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .contact-box {
        padding: 32px 24px;
    }
    
    .contact-content h2 {
        font-size: 1.5rem;
    }
}