/* ==================== 基础变量 ==================== */
:root {
    /* Logo主色调 - 温暖橙 */
    --primary-color: #F77B56;
    --primary-light: #FFA589;
    --primary-dark: #E55A3A;
    --secondary-color: #FFB799;
    --accent-color: #FFCEB8;
    
    /* 背景色 - 温暖米白/粉白 */
    --background-light: #FFF5F2;
    --background-warm: #FFF8F5;
    
    /* 文字色 */
    --text-dark: #3D2A24;
    --text-medium: #6B5045;
    --text-light: #9C857D;
    
    --white: #FFFFFF;
    
    /* 阴影 - 温暖的橙调阴影 */
    --shadow-sm: 0 2px 12px rgba(247, 123, 86, 0.08);
    --shadow-md: 0 8px 30px rgba(247, 123, 86, 0.12);
    --shadow-lg: 0 20px 60px rgba(247, 123, 86, 0.18);
    
    --transition-fast: 0.25s ease;
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== 重置样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--background-warm);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(247, 123, 86, 0.08);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.logo:hover {
    transform: scale(1.02);
}

.logo img {
    width: 44px;
    height: 44px;
}

.nav-menu {
    display: flex;
    gap: 48px;
}

.nav-menu a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-medium);
    transition: var(--transition-fast);
    position: relative;
    padding: 8px 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
    transition: var(--transition-normal);
    transform: translateX(-50%);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 28px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ==================== Hero 区域 ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 40px 80px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(160deg, var(--background-warm) 0%, #FFE8E0 30%, var(--background-light) 100%);
    z-index: -2;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 70%;
    height: 120%;
    background: radial-gradient(ellipse, rgba(247, 123, 86, 0.08) 0%, transparent 70%);
    animation: pulse-bg 12s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -15%;
    width: 50%;
    height: 80%;
    background: radial-gradient(ellipse, rgba(255, 166, 137, 0.1) 0%, transparent 60%);
    animation: pulse-bg 15s ease-in-out infinite reverse;
}

@keyframes pulse-bg {
    0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.6; }
    50% { transform: scale(1.15) rotate(3deg); opacity: 1; }
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    padding: 10px 24px;
    background: linear-gradient(135deg, rgba(247, 123, 86, 0.12), rgba(255, 166, 137, 0.12));
    border: 1px solid rgba(247, 123, 86, 0.2);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 28px;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 24px;
    line-height: 1.2;
    animation: fadeInUp 0.8s ease 0.1s forwards;
    opacity: 0;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-medium);
    margin-bottom: 32px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-features {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease 0.3s forwards;
    opacity: 0;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    background: var(--white);
    border-radius: 14px;
    box-shadow: var(--shadow-sm);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition-normal);
}

.hero-feature:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.hero-message {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 16px;
    font-weight: 500;
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

.hero-slogan {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    letter-spacing: 6px;
    animation: fadeInUp 0.8s ease 0.5s forwards;
    opacity: 0;
}

.hero-footer {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

.hero-cta {
    display: flex;
    gap: 20px;
    animation: fadeInUp 0.8s ease 0.7s forwards;
    opacity: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 44px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 60px;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    box-shadow: 0 8px 25px rgba(247, 123, 86, 0.35);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(247, 123, 86, 0.45);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-4px);
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInUp 1s ease 0.3s forwards;
    opacity: 0;
}

.hero-image-wrapper {
    position: relative;
    z-index: 2;
}

.hero-image {
    width: 420px;
    height: auto;
    filter: drop-shadow(0 30px 60px rgba(247, 123, 86, 0.2));
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-25px) rotate(1deg); }
}

.hero-float-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    font-weight: 600;
    color: var(--primary-color);
    z-index: 3;
    animation: floatCard 6s ease-in-out infinite;
}

.hero-float-1 {
    top: 10%;
    right: -10%;
    animation-delay: 0s;
}

.hero-float-2 {
    bottom: 15%;
    left: -5%;
    animation-delay: 2s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-light);
    font-size: 0.85rem;
    animation: fadeInUp 1s ease 1s forwards;
    opacity: 0;
}

.scroll-mouse {
    width: 28px;
    height: 44px;
    border: 2px solid var(--primary-color);
    border-radius: 14px;
    position: relative;
}

.scroll-wheel {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 10px;
    background: var(--primary-color);
    border-radius: 2px;
    animation: scroll-down 2s ease-in-out infinite;
}

@keyframes scroll-down {
    0% { top: 10px; opacity: 1; }
    100% { top: 26px; opacity: 0; }
}

/* ==================== 章节通用样式 ==================== */
.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, rgba(247, 123, 86, 0.12), rgba(255, 166, 137, 0.12));
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 18px;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-medium);
}

/* ==================== 功能特点 ==================== */
.features {
    padding: 120px 0;
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.feature-card {
    position: relative;
    background: linear-gradient(180deg, var(--background-warm) 0%, var(--white) 100%);
    padding: 48px 32px;
    border-radius: 24px;
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid rgba(247, 123, 86, 0.08);
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(247, 123, 86, 0.12);
}

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

.feature-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 28px;
    background: linear-gradient(145deg, var(--primary-color), var(--primary-light));
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
    box-shadow: 0 12px 30px rgba(247, 123, 86, 0.3);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 16px 40px rgba(247, 123, 86, 0.4);
}

.feature-icon img {
    width: 52px;
    height: 52px;
}

.feature-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.feature-card p {
    color: var(--text-medium);
    line-height: 1.8;
    font-size: 1rem;
}

.feature-decoration {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(255, 206, 184, 0.3), transparent);
    border-radius: 50%;
    transition: var(--transition-normal);
}

.feature-card:hover .feature-decoration {
    transform: scale(1.5);
    opacity: 0.8;
}

/* ==================== 品牌故事 ==================== */
.story {
    position: relative;
    padding: 140px 0;
    background: var(--background-light);
    overflow: hidden;
}

.story-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 80% 50%, rgba(247, 123, 86, 0.06) 0%, transparent 50%);
}

.story-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.story-visual {
    display: flex;
    justify-content: center;
}

.story-image {
    max-width: 100%;
    filter: drop-shadow(0 30px 60px rgba(247, 123, 86, 0.15));
}

.story-text {
    max-width: 540px;
}

.story-text .section-tag {
    margin-bottom: 16px;
}

.story-text .section-title {
    text-align: left;
    margin-bottom: 32px;
}

.story-quote {
    padding: 28px 36px;
    background: var(--white);
    border-left: 5px solid var(--primary-color);
    border-radius: 0 20px 20px 0;
    margin-bottom: 36px;
    box-shadow: var(--shadow-sm);
}

.story-quote p {
    font-size: 1.35rem;
    font-style: italic;
    color: var(--primary-color);
    font-weight: 600;
    line-height: 1.5;
}

.story-description {
    font-size: 1.08rem;
    color: var(--text-medium);
    line-height: 2;
    margin-bottom: 24px;
}

.story-slogan {
    display: inline-flex;
    align-items: center;
    gap: 20px;
    padding: 20px 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 60px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    margin-top: 16px;
}

.slogan-dot {
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
}

/* ==================== 情感诉求 ==================== */
.emotion {
    padding: 140px 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--background-warm) 100%);
}

.emotion-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.emotion-card {
    position: relative;
    background: var(--white);
    padding: 56px 40px;
    border-radius: 28px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-slow);
    border: 1px solid rgba(247, 123, 86, 0.06);
}

.emotion-card:nth-child(2) {
    transform: translateY(-20px);
}

.emotion-card:hover {
    transform: translateY(-16px);
    box-shadow: var(--shadow-lg);
}

.emotion-card:nth-child(2):hover {
    transform: translateY(-36px);
}

.emotion-icon {
    margin-bottom: 32px;
}

.emotion-icon img {
    width: 100px;
    height: 100px;
    margin: 0 auto;
    transition: var(--transition-normal);
}

.emotion-card:hover .emotion-icon img {
    transform: scale(1.15) rotate(5deg);
}

.emotion-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 18px;
}

.emotion-card p {
    color: var(--text-medium);
    line-height: 1.8;
    font-size: 1.05rem;
}

.emotion-line {
    width: 50px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
    margin: 28px auto 0;
}

/* ==================== 下载区域 ==================== */
.download {
    position: relative;
    padding: 140px 0;
    background: linear-gradient(160deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    overflow: hidden;
}

.download-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.download-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
}

.download-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse, rgba(255, 206, 184, 0.15) 0%, transparent 60%);
}

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

.section-header-light {
    margin-bottom: 60px;
}

.section-tag-light {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.section-title-light {
    font-size: 3rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 18px;
}

.section-subtitle-light {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.85);
}

.download-platforms {
    display: flex;
    justify-content: center;
    gap: 28px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 40px;
    background: var(--white);
    color: var(--primary-color);
    border-radius: 20px;
    transition: var(--transition-normal);
    min-width: 280px;
}

.download-btn:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.download-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
}

.download-icon img {
    width: 100%;
    height: 100%;
}

.download-info {
    text-align: left;
    flex: 1;
}

.download-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 4px;
}

.download-platform {
    display: block;
    font-size: 1.15rem;
    font-weight: 700;
}

.download-arrow {
    color: var(--primary-color);
    opacity: 0;
    transform: translateX(-8px);
    transition: var(--transition-fast);
}

.download-btn:hover .download-arrow {
    opacity: 1;
    transform: translateX(0);
}

.download-qr {
    text-align: center;
    margin-top: 20px;
}

.download-qr img {
    width: 160px;
    height: 160px;
    background: var(--white);
    padding: 16px;
    border-radius: 20px;
    margin: 0 auto;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.download-qr p {
    margin-top: 24px;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
}

/* ==================== 联系我们 ==================== */
.contact {
    padding: 140px 0;
    background: var(--background-warm);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 32px 36px;
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid transparent;
}

.contact-item:hover {
    transform: translateX(12px);
    box-shadow: var(--shadow-md);
    border-color: rgba(247, 123, 86, 0.1);
}

.contact-icon {
    width: 64px;
    height: 64px;
    flex-shrink: 0;
}

.contact-icon img {
    width: 100%;
    height: 100%;
}

.contact-text h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 6px;
}

.contact-text p {
    font-size: 1.2rem;
    color: var(--text-dark);
    font-weight: 600;
}

/* ==================== 页脚 ==================== */
.footer {
    background: linear-gradient(180deg, #4A3530 0%, #3D2A24 100%);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    margin-bottom: 60px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 20px;
}

.footer-brand img {
    width: 56px;
    height: 56px;
}

.footer-brand-text h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.footer-brand-text p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
}

.footer-column h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--white);
}

.footer-column ul li {
    margin-bottom: 14px;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.footer-column ul li a:hover {
    color: var(--primary-light);
    padding-left: 6px;
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.9rem;
}

/* ==================== 动画 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .emotion-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .emotion-card:nth-child(2) {
        transform: translateY(0);
    }
    
    .emotion-card:nth-child(2):hover {
        transform: translateY(-16px);
    }
}

@media (max-width: 992px) {
    .container {
        padding: 0 32px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-features {
        justify-content: center;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .hero-image {
        width: 320px;
    }
    
    .story-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .story-text .section-title {
        text-align: center;
    }
    
    .story-slogan {
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .section-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }
    
    .nav-container {
        padding: 0 24px;
        height: 70px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }
    
    .nav-menu a {
        display: block;
        padding: 18px 0;
    }
    
    .hero {
        padding: 100px 24px 60px;
    }
    
    .hero-title {
        font-size: 2.4rem;
    }
    
    .hero-slogan {
        font-size: 2rem;
        letter-spacing: 3px;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 14px;
    }
    
    .hero-image {
        width: 260px;
    }
    
    .hero-float-card {
        display: none;
    }
    
    .features {
        padding: 80px 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .feature-card {
        padding: 36px 28px;
    }
    
    .story {
        padding: 80px 0;
    }
    
    .emotion {
        padding: 80px 0;
    }
    
    .emotion-cards {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .emotion-card {
        padding: 40px 28px;
    }
    
    .download {
        padding: 80px 0;
    }
    
    .download-platforms {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 320px;
        justify-content: center;
    }
    
    .contact {
        padding: 80px 0;
    }
    
    .contact-item {
        padding: 24px 28px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 90px 20px 50px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-message {
        font-size: 1.2rem;
    }
    
    .hero-slogan {
        font-size: 1.6rem;
        letter-spacing: 2px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
}