/* ============ CSS Variables ============ */
:root {
    --primary: #e91e63;
    --primary-light: #f06292;
    --primary-dark: #c2185b;
    --primary-gradient: linear-gradient(135deg, #f06292 0%, #e91e63 50%, #c2185b 100%);
    --pink-50: #fce4ec;
    --pink-100: #f8bbd0;
    --pink-200: #f48fb1;
    --pink-300: #f06292;
    --pink-400: #ec407a;
    --pink-500: #e91e63;
    --pink-600: #d81b60;
    --pink-700: #c2185b;
    --purple-accent: #ab47bc;
    --purple-light: #ce93d8;
    --bg-white: #ffffff;
    --bg-light: #fff5f8;
    --bg-dark: #1a0a12;
    --text-primary: #1a0a12;
    --text-secondary: #5c4550;
    --text-light: #8a7580;
    --text-white: #ffffff;
    --border-light: #f0d5dd;
    --shadow-sm: 0 2px 8px rgba(233, 30, 99, 0.08);
    --shadow-md: 0 4px 16px rgba(233, 30, 99, 0.12);
    --shadow-lg: 0 8px 32px rgba(233, 30, 99, 0.18);
    --shadow-xl: 0 16px 48px rgba(233, 30, 99, 0.24);
    --shadow-soft: 0 8px 40px rgba(233, 30, 99, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

a {
    text-decoration: none;
    color: inherit;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============ Navbar ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(233, 30, 99, 0.06);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--primary-gradient);
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    padding: 8px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: var(--pink-50);
}

.nav-link.btn-download {
    background: var(--primary-gradient);
    color: var(--text-white) !important;
    padding: 10px 24px;
    font-weight: 600;
    box-shadow: 0 4px 14px rgba(233, 30, 99, 0.35);
}

.nav-link.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(233, 30, 99, 0.45);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============ Hero Section ============ */
.hero {
    min-height: 100vh;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--bg-light) 0%, #ffffff 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--pink-200);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--purple-light);
    bottom: -150px;
    left: -100px;
    animation-delay: 5s;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--pink-100);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 30px) scale(1.02); }
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 60px 24px 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--pink-50);
    border: 1px solid var(--pink-100);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 24px;
}

.badge-icon {
    font-size: 16px;
}

.hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.highlight {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--pink-100);
    border-radius: 3px;
    opacity: 0.6;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-lg {
    padding: 18px 40px;
    font-size: 17px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-white);
    box-shadow: 0 8px 24px rgba(233, 30, 99, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(233, 30, 99, 0.45);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary);
    border: 2px solid var(--pink-200);
}

.btn-secondary:hover {
    background: var(--pink-50);
    border-color: var(--primary);
    transform: translateY(-3px);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 28px;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-light);
}

/* Hero Visual - Phone Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 320px;
    height: 640px;
    background: var(--bg-dark);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 28px;
    background: var(--bg-dark);
    border-radius: 0 0 20px 20px;
    z-index: 2;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #fff5f8 0%, #ffffff 100%);
    border-radius: 30px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 50px 16px 16px;
    background: var(--primary-gradient);
    color: var(--text-white);
}

.chat-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    flex-shrink: 0;
}

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

.chat-name {
    font-size: 16px;
    font-weight: 600;
}

.chat-status {
    font-size: 12px;
    opacity: 0.8;
}

.chat-body {
    flex: 1;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
}

.chat-msg {
    max-width: 80%;
    padding: 10px 14px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.5;
    animation: msgIn 0.5s ease forwards;
}

.msg-left {
    align-self: flex-start;
    background: var(--pink-50);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.msg-right {
    align-self: flex-end;
    background: var(--primary-gradient);
    color: var(--text-white);
    border-bottom-right-radius: 4px;
}

@keyframes msgIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.chat-typing {
    align-self: flex-start;
    display: flex;
    gap: 4px;
    padding: 12px 16px;
    background: var(--pink-50);
    border-radius: 16px;
    border-bottom-left-radius: 4px;
}

.chat-typing span {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-8px); opacity: 1; }
}

.chat-input {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-white);
    border-top: 1px solid var(--border-light);
}

.chat-input input {
    flex: 1;
    padding: 10px 16px;
    background: var(--pink-50);
    border: none;
    border-radius: 20px;
    font-size: 14px;
    outline: none;
}

.send-btn {
    width: 38px;
    height: 38px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    flex-shrink: 0;
}

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

/* ============ Version Bar ============ */
.version-bar {
    background: var(--bg-white);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    padding: 20px 0;
}

.version-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.version-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.version-label {
    font-size: 13px;
    color: var(--text-light);
}

.version-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.version-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-gradient);
    color: var(--text-white);
    border-radius: 100px;
    font-size: 14px;
}

.version-divider {
    width: 1px;
    height: 36px;
    background: var(--border-light);
}

/* ============ Section Common ============ */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============ Showcase ============ */
.showcase {
    padding: 100px 0;
    background: var(--bg-light);
}

.showcase-display {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.showcase-main {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    aspect-ratio: 9/16;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-light);
}

.main-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.4s ease;
}

.showcase-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--text-light);
    background: linear-gradient(135deg, var(--pink-50) 0%, var(--bg-white) 100%);
}

.showcase-placeholder.hidden {
    display: none;
}

.placeholder-icon {
    width: 80px;
    height: 80px;
    background: var(--pink-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.placeholder-icon svg {
    width: 40px;
    height: 40px;
    color: var(--primary);
}

.showcase-placeholder p {
    font-size: 15px;
}

.showcase-thumbs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 600px;
    margin: 0 auto;
}

.thumb-item {
    position: relative;
    aspect-ratio: 9/16;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    background: var(--bg-white);
    border: 2px solid transparent;
}

.thumb-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.thumb-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumb-item img[src=""] {
    display: none;
}

.thumb-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--pink-50) 0%, var(--bg-white) 100%);
    z-index: 0;
}

.thumb-item img {
    position: relative;
    z-index: 1;
}

.thumb-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px 16px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
    color: var(--text-white);
    z-index: 2;
}

.thumb-title {
    font-size: 14px;
    font-weight: 600;
}

/* ============ Features ============ */
.features {
    padding: 100px 0;
    background: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    padding: 36px 28px;
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-slow);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--pink-200);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.icon-1 { background: linear-gradient(135deg, #ffcdd2, #ef9a9a); color: #c62828; }
.icon-2 { background: linear-gradient(135deg, #f8bbd0, #f48fb1); color: #c2185b; }
.icon-3 { background: linear-gradient(135deg, #e1bee7, #ce93d8); color: #6a1b9a; }
.icon-4 { background: linear-gradient(135deg, #b3e5fc, #81d4fa); color: #0277bd; }
.icon-5 { background: linear-gradient(135deg, #fff9c4, #fff59d); color: #f57f17; }
.icon-6 { background: linear-gradient(135deg, #c8e6c9, #a5d6a7); color: #2e7d32; }

.feature-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============ Download Section ============ */
.download-section {
    position: relative;
    padding: 100px 0;
    background: linear-gradient(135deg, var(--pink-500) 0%, var(--purple-accent) 100%);
    overflow: hidden;
}

.download-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.download-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: var(--bg-white);
    clip-path: polygon(0 60%, 25% 40%, 50% 55%, 75% 35%, 100% 50%, 100% 100%, 0 100%);
}

.download-container {
    position: relative;
    z-index: 2;
}

.download-content {
    text-align: center;
    color: var(--text-white);
    max-width: 700px;
    margin: 0 auto;
}

.download-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 100px;
    font-size: 14px;
    margin-bottom: 28px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #4caf50;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.download-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.3;
}

.download-desc {
    font-size: 17px;
    opacity: 0.9;
    line-height: 1.7;
    margin-bottom: 40px;
}

.download-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.btn-download-main {
    display: inline-flex;
    align-items: center;
    gap: 24px;
    padding: 20px 40px 20px 28px;
    background: var(--text-white);
    color: var(--primary);
    border-radius: var(--radius-xl);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    transition: var(--transition);
    text-decoration: none;
    max-width: 360px;
    width: 100%;
    justify-content: space-between;
}

.btn-download-main:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.btn-download-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.download-icon {
    width: 28px;
    height: 28px;
}

.btn-download-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.btn-download-label {
    font-size: 18px;
    font-weight: 800;
}

.btn-download-sub {
    font-size: 13px;
    color: var(--text-secondary);
}

.btn-download-arrow {
    font-size: 24px;
    font-weight: 300;
    transition: transform 0.3s ease;
}

.btn-download-main:hover .btn-download-arrow {
    transform: translateX(4px);
}

.download-tips {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.tip-item {
    font-size: 14px;
    opacity: 0.9;
}

/* ============ Reviews ============ */
.reviews {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.review-card {
    background: var(--bg-white);
    padding: 28px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

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

.review-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.reviewer-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-white);
    flex-shrink: 0;
}

.reviewer-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.reviewer-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.reviewer-date {
    font-size: 13px;
    color: var(--text-light);
}

.review-rating {
    font-size: 14px;
    color: #ffc107;
    width: 100%;
    margin-top: 4px;
}

.review-content {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============ FAQ ============ */
.faq {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.faq-item {
    border-bottom: 1px solid var(--border-light);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    text-align: left;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition);
    cursor: pointer;
}

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

.faq-q-text {
    flex: 1;
}

.faq-icon {
    width: 24px;
    height: 24px;
    position: relative;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    background: var(--primary);
    border-radius: 2px;
}

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

.faq-icon::after {
    width: 2px;
    height: 14px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
    opacity: 0;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 20px;
}

.faq-answer p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============ Footer ============ */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 60px 0 30px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-logo {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-gradient);
}

.footer-brand-name {
    font-size: 24px;
    font-weight: 700;
}

.footer-slogan {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.footer-col a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.4);
}

/* ============ Back to Top ============ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

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

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

/* ============ Responsive ============ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-content {
        order: 2;
    }

    .hero-visual {
        order: 1;
    }

    .hero-buttons,
    .hero-stats {
        justify-content: center;
    }

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

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

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 14px 20px;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

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

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .hero {
        padding-top: 60px;
    }

    .hero-container {
        padding: 40px 20px;
        gap: 30px;
    }

    .phone-mockup {
        width: 280px;
        height: 560px;
    }

    .hero-stats {
        gap: 20px;
    }

    .stat-divider {
        height: 30px;
    }

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

    .showcase-thumbs {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }

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

    .download-title {
        font-size: 26px;
    }

    .version-container {
        gap: 20px;
    }

    .version-divider {
        display: none;
    }

    .btn {
        padding: 14px 24px;
        font-size: 15px;
    }

    .btn-lg {
        padding: 16px 32px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 15px;
    }

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

    .btn {
        width: 100%;
    }

    .stat-num {
        font-size: 22px;
    }

    .phone-mockup {
        width: 260px;
        height: 520px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .features,
    .showcase,
    .reviews,
    .faq,
    .download-section {
        padding: 60px 0;
    }

    .feature-card {
        padding: 28px 20px;
    }

    .btn-download-main {
        padding: 16px 24px;
    }

    .download-icon {
        width: 24px;
        height: 24px;
    }
}