/* ============================================
   萨克斯大师 - 下载官网样式
   支持PC和手机端响应式布局
   ============================================ */

/* CSS 变量 */
:root {
    --primary: #C8963E;
    --primary-light: #E8B960;
    --primary-dark: #A07830;
    --primary-bg: #FDF8F0;
    --dark: #1A1A2E;
    --dark-light: #2D2D44;
    --text: #333344;
    --text-light: #666680;
    --text-lighter: #9999AA;
    --white: #FFFFFF;
    --bg: #FAFAFA;
    --border: #E8E8EE;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 16px 60px rgba(0,0,0,0.16);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 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;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 20px;
    color: var(--dark);
}

.logo-icon {
    font-size: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: contain;
}

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

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-light);
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
    transition: var(--transition);
}

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

.nav-download-btn {
    background: var(--primary) !important;
    color: var(--white) !important;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600 !important;
}

.nav-download-btn::after {
    display: none !important;
}

.nav-download-btn:hover {
    background: var(--primary-dark) !important;
    transform: translateY(-1px);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: 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);
}

/* ============================================
   Hero 首屏
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #FDF8F0 0%, #FFF5E6 30%, #F0E8FF 70%, #E8F0FF 100%);
    padding-top: 72px;
    overflow: hidden;
}

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

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #6C5CE7 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    animation: float 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #4ECDC4 0%, transparent 70%);
    top: 40%;
    left: 30%;
    animation: float 12s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
    padding: 60px 0;
}

.hero-badge {
    display: inline-block;
    background: rgba(200, 150, 62, 0.12);
    color: var(--primary-dark);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid rgba(200, 150, 62, 0.2);
}

.hero-text h1 {
    font-size: 56px;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.1;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 22px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 4px;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 480px;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: 0 4px 16px rgba(200, 150, 62, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(200, 150, 62, 0.45);
}

.btn-outline {
    background: var(--white);
    color: var(--text);
    border: 2px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    text-align: center;
}

.stat-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--dark);
    line-height: 1;
}

.stat-unit {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-lighter);
    margin-top: 4px;
}

/* 手机模型 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.phone-mockup {
    position: relative;
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: var(--dark);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl), 0 0 80px rgba(200, 150, 62, 0.15);
    position: relative;
    z-index: 2;
}

.phone-notch {
    width: 120px;
    height: 28px;
    background: var(--dark);
    border-radius: 0 0 16px 16px;
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #FFF8ED 0%, #FFFFFF 100%);
    border-radius: 30px;
    overflow: hidden;
}

.screen-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 36px 16px 12px;
    font-size: 14px;
    font-weight: 700;
    color: var(--dark);
}

.screen-app-icon {
    font-size: 20px;
}

.screen-content {
    padding: 8px 16px;
}

.screen-menu {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 16px;
}

.screen-menu-item {
    text-align: center;
    padding: 10px 4px;
    border-radius: 12px;
    font-size: 10px;
    color: var(--text-light);
    background: var(--white);
}

.screen-menu-item.active {
    background: var(--primary);
    color: var(--white);
}

.screen-icon {
    font-size: 20px;
    margin-bottom: 4px;
}

.screen-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.screen-card {
    height: 60px;
    background: linear-gradient(135deg, rgba(200, 150, 62, 0.1), rgba(200, 150, 62, 0.05));
    border-radius: 10px;
    border: 1px solid rgba(200, 150, 62, 0.15);
}

.screen-card.short {
    height: 40px;
    width: 70%;
}

.phone-glow {
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(200, 150, 62, 0.2) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--text-lighter);
    font-size: 12px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================
   功能特色
   ============================================ */
.features {
    padding: 100px 0;
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    background: rgba(200, 150, 62, 0.1);
    color: var(--primary);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-light);
    max-width: 500px;
    margin: 0 auto;
}

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

.feature-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--icon-color, var(--primary));
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    background: color-mix(in srgb, var(--icon-color, var(--primary)) 10%, transparent);
    color: var(--icon-color, var(--primary));
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ============================================
   产品展示
   ============================================ */
.showcase {
    padding: 100px 0;
    background: var(--bg);
}

.showcase-grid {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.showcase-item.showcase-large {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 60px;
    align-items: center;
}

.showcase-item.showcase-large.reverse {
    direction: rtl;
}

.showcase-item.showcase-large.reverse > * {
    direction: ltr;
}

.showcase-phone-frame {
    width: 240px;
    height: 480px;
    background: var(--dark);
    border-radius: 32px;
    padding: 10px;
    box-shadow: var(--shadow-lg);
}

.showcase-phone-notch {
    width: 100px;
    height: 24px;
    background: var(--dark);
    border-radius: 0 0 14px 14px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.showcase-phone-frame {
    position: relative;
}

.showcase-screen {
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 24px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}

.showcase-info h3 {
    font-size: 28px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
}

.showcase-info p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.showcase-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.showcase-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
    color: var(--dark);
}

.showcase-features li::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    background: rgba(0, 184, 148, 0.12);
    color: #00B894;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
}

/* 小功能卡片 */
.showcase-small-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.showcase-small {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
}

.showcase-small:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.showcase-small-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.showcase-small h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}

.showcase-small p {
    font-size: 13px;
    color: var(--text-light);
}

/* ============================================
   关于我们
   ============================================ */
.about {
    padding: 100px 0;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 32px;
}

.value-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
}

.value-icon {
    font-size: 28px;
}

.value-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
}

.value-item span {
    font-size: 13px;
    color: var(--text-lighter);
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    position: relative;
}

.about-card-stack {
    position: relative;
    width: 300px;
    height: 300px;
}

.about-float-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    box-shadow: var(--shadow-md);
    font-weight: 600;
    color: var(--dark);
    font-size: 15px;
    animation: cardFloat 6s ease-in-out infinite;
}

.card-emoji {
    font-size: 24px;
}

.about-float-card.card-1 {
    top: 0;
    left: 0;
    animation-delay: 0s;
}

.about-float-card.card-2 {
    top: 30px;
    right: 0;
    animation-delay: 1.5s;
}

.about-float-card.card-3 {
    bottom: 30px;
    left: 10px;
    animation-delay: 3s;
}

.about-float-card.card-4 {
    bottom: 0;
    right: 10px;
    animation-delay: 4.5s;
}

@keyframes cardFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ============================================
   下载区域 - 双平台区分
   ============================================ */
.download {
    padding: 100px 0;
    background: var(--bg);
}

.download-platforms {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.platform-card {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px 32px 32px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
    overflow: hidden;
}

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

.platform-card-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.ios-card .platform-card-glow {
    background: linear-gradient(90deg, #007AFF 0%, #5AC8FA 100%);
}

.android-card .platform-card-glow {
    background: linear-gradient(90deg, #3DDC84 0%, #4CAF50 100%);
}

.platform-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.ios-card .platform-icon {
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.1) 0%, rgba(90, 200, 250, 0.1) 100%);
    color: #007AFF;
}

.android-card .platform-icon {
    background: linear-gradient(135deg, rgba(61, 220, 132, 0.1) 0%, rgba(76, 175, 80, 0.1) 100%);
    color: #3DDC84;
}

.platform-card h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 6px;
}

.platform-desc {
    font-size: 14px;
    color: var(--text-lighter);
    margin-bottom: 24px;
}

.platform-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}

.qr-box {
    width: 140px;
    height: 140px;
    background: var(--white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: var(--transition);
}

.qr-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qr-loading {
    font-size: 13px;
    color: var(--text-lighter);
}

.platform-card:hover .qr-box {
    border-color: var(--primary-light);
}

.qr-label {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 500;
}

.platform-download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    margin-bottom: 10px;
}

.ios-download-btn {
    background: linear-gradient(135deg, #007AFF 0%, #0062CC 100%);
    color: var(--white);
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.ios-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 122, 255, 0.4);
}

.android-download-btn {
    background: linear-gradient(135deg, #3DDC84 0%, #2EBE6E 100%);
    color: var(--white);
    box-shadow: 0 4px 16px rgba(61, 220, 132, 0.3);
}

.android-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(61, 220, 132, 0.4);
}

.store-download-btn {
    background: var(--bg);
    color: var(--dark);
    border: 1px solid var(--border);
    font-size: 15px;
}

.store-download-btn:hover {
    border-color: #3DDC84;
    color: #2EBE6E;
    background: rgba(61, 220, 132, 0.06);
}

.platform-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.info-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--text-lighter);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}

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

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 14px;
    opacity: 0.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 14px;
    opacity: 0.6;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-col a:hover {
    opacity: 1;
    color: var(--primary-light);
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    opacity: 0.4;
}

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

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

/* ============================================
   动画
   ============================================ */
.feature-card,
.showcase-item,
.about-content {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.feature-card.visible,
.showcase-item.visible,
.about-content.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   响应式 - 平板
   ============================================ */
@media (max-width: 1024px) {
    .hero-content {
        gap: 40px;
    }

    .hero-text h1 {
        font-size: 44px;
    }

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

    .showcase-item.showcase-large {
        gap: 40px;
    }

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

    .about-content {
        gap: 40px;
    }
}

/* ============================================
   响应式 - 手机
   ============================================ */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }

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

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

    .hero {
        min-height: auto;
        padding-top: 72px;
        padding-bottom: 40px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 40px 0 20px;
        gap: 40px;
    }

    .hero-text h1 {
        font-size: 38px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-desc {
        margin: 0 auto 24px;
    }

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

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

    .hero-visual {
        order: -1;
    }

    .phone-frame {
        width: 220px;
        height: 440px;
    }

    .scroll-indicator {
        display: none;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .features {
        padding: 60px 0;
    }

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

    .feature-card {
        padding: 24px 20px;
    }

    .showcase {
        padding: 60px 0;
    }

    .showcase-item.showcase-large {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .showcase-item.showcase-large.reverse {
        direction: ltr;
    }

    .showcase-phone {
        display: flex;
        justify-content: center;
    }

    .showcase-phone-frame {
        width: 200px;
        height: 400px;
    }

    .showcase-features {
        align-items: center;
    }

    .showcase-small-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .about {
        padding: 60px 0;
    }

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

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

    .about-visual {
        min-height: 300px;
    }

    .about-card-stack {
        width: 260px;
        height: 260px;
    }

    .download {
        padding: 60px 0;
    }

    .download-platforms {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 400px;
    }

    .platform-card {
        padding: 32px 24px 24px;
    }

    .platform-icon {
        width: 64px;
        height: 64px;
    }

    .platform-icon svg {
        width: 36px;
        height: 36px;
    }

    .platform-card h3 {
        font-size: 20px;
    }

    .qr-box {
        width: 120px;
        height: 120px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-links {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 32px;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-num {
        font-size: 26px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    .showcase-small-grid {
        grid-template-columns: 1fr 1fr;
    }

    .about-card-stack {
        width: 220px;
        height: 240px;
    }

    .about-float-card {
        padding: 10px 14px;
        font-size: 13px;
    }

    .card-emoji {
        font-size: 20px;
    }
}