/* ===== CSS变量 ===== */
:root {
    --primary: #9B59B6;
    --primary-dark: #8E44AD;
    --primary-light: #BB8FCE;
    --secondary: #FF6B9D;
    --secondary-light: #FFB3C6;
    --accent: #FFC0CB;
    --gradient-primary: linear-gradient(135deg, #9B59B6 0%, #FF6B9D 100%);
    --gradient-soft: linear-gradient(135deg, #F3E5F5 0%, #FCE4EC 100%);
    --gradient-dark: linear-gradient(135deg, #6C3483 0%, #C0392B 100%);
    --bg-light: #FAFAFA;
    --bg-white: #FFFFFF;
    --text-primary: #2C3E50;
    --text-secondary: #7F8C8D;
    --text-light: #BDC3C7;
    --border-light: #ECF0F1;
    --shadow-sm: 0 2px 8px rgba(155, 89, 182, 0.1);
    --shadow-md: 0 4px 16px rgba(155, 89, 182, 0.15);
    --shadow-lg: 0 8px 32px rgba(155, 89, 182, 0.2);
    --shadow-xl: 0 16px 48px rgba(155, 89, 182, 0.25);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.3s 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, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--bg-light);
}

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

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

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

/* ===== 通用容器 ===== */
.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 rgba(255, 255, 255, 0.5);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -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;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: rgba(155, 89, 182, 0.08);
}

.nav-download-btn {
    background: var(--gradient-primary);
    color: white !important;
    padding: 10px 24px !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(155, 89, 182, 0.3);
    transition: var(--transition);
}

.nav-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(155, 89, 182, 0.4);
}

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

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

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

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

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

/* ===== Hero区域 ===== */
.hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 120px 24px 80px;
    background: linear-gradient(180deg, #F8F4FC 0%, #FFF5F7 50%, #FFFFFF 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.6;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(155, 89, 182, 0.3), transparent);
    top: -100px;
    right: -80px;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255, 107, 157, 0.25), transparent);
    bottom: -50px;
    left: -50px;
    animation-delay: 5s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(255, 192, 203, 0.4), transparent);
    top: 30%;
    left: 10%;
    animation-delay: 10s;
}

.shape-4 {
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(187, 143, 206, 0.3), transparent);
    bottom: 20%;
    right: 15%;
    animation-delay: 15s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(20px, -30px) scale(1.05);
    }
    50% {
        transform: translate(-10px, -50px) scale(1.1);
    }
    75% {
        transform: translate(-30px, -20px) scale(1.05);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text {
    text-align: left;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(155, 89, 182, 0.1);
    color: var(--primary-dark);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}

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

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--gradient-primary);
    color: white;
    padding: 16px 32px;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1.05rem;
    box-shadow: 0 8px 25px rgba(155, 89, 182, 0.35);
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(155, 89, 182, 0.45);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: white;
    color: var(--primary);
    padding: 16px 32px;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1.05rem;
    border: 2px solid var(--primary-light);
    transition: var(--transition);
}

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

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

.hero-info {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 20px 28px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.info-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

.info-divider {
    width: 1px;
    height: 30px;
    background: var(--border-light);
}

/* Hero视觉区域 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.phone-mockup {
    position: relative;
    animation: phoneFloat 6s ease-in-out infinite;
}

@keyframes phoneFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

.phone-frame {
    width: 300px;
    height: 600px;
    background: linear-gradient(145deg, #2C3E50, #1a1a2e);
    border-radius: 45px;
    padding: 15px;
    position: relative;
    box-shadow: var(--shadow-xl), inset 0 2px 4px rgba(255,255,255,0.1);
}

.phone-img {
    width: 100%;
    height: 100%;
    border-radius: 35px;
    object-fit: cover;
    background: linear-gradient(135deg, #F3E5F5, #FCE4EC);
}

.phone-glow {
    position: absolute;
    inset: -20px;
    border-radius: 55px;
    background: var(--gradient-primary);
    opacity: 0.2;
    z-index: -1;
    filter: blur(40px);
}

.floating-tag {
    position: absolute;
    padding: 10px 18px;
    background: white;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    white-space: nowrap;
    animation: tagFloat 4s ease-in-out infinite;
}

.tag-1 {
    top: 10%;
    left: -40px;
    color: var(--primary);
    animation-delay: 0s;
}

.tag-2 {
    bottom: 20%;
    right: -30px;
    color: var(--secondary);
    animation-delay: 1s;
}

.tag-3 {
    bottom: 5%;
    left: 20px;
    color: #E74C3C;
    animation-delay: 2s;
}

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

/* ===== 区块通用样式 ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

/* ===== 截图展示 ===== */
.screenshots {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.screenshot-card {
    opacity: 0;
    transform: translateY(40px);
    transition: var(--transition);
}

.screenshot-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.screenshot-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 9/16;
    background: linear-gradient(135deg, #F3E5F5, #FCE4EC);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
}

.screenshot-wrapper:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
}

.screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.screenshot-wrapper:hover .screenshot-img {
    transform: scale(1.05);
}

.screenshot-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(155, 89, 182, 0.8) 100%);
    display: flex;
    align-items: flex-end;
    padding: 24px;
    opacity: 0;
    transition: var(--transition);
}

.screenshot-wrapper:hover .screenshot-overlay {
    opacity: 1;
}

.screenshot-label {
    color: white;
    font-weight: 600;
    font-size: 1rem;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

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

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: inline-block;
    padding: 12px;
    background: var(--gradient-soft);
    border-radius: var(--radius-md);
}

.feature-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 用户评价 ===== */
.reviews {
    padding: 100px 0;
    background: var(--bg-white);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.review-card {
    background: var(--gradient-soft);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

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

.review-stars {
    color: #FFD700;
    font-size: 1.2rem;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.review-content {
    font-size: 1rem;
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

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

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.author-device {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

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

.faq-item {
    background: white;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.faq-item.active {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    padding: 24px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    transition: var(--transition);
}

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

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform 0.3s ease;
    font-weight: 300;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.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: 0 28px 24px;
}

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

/* ===== 下载区域 ===== */
.download {
    position: relative;
    padding: 120px 0;
    background: var(--gradient-primary);
    overflow: hidden;
}

.download-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.download-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
    background: white;
    animation: float 15s infinite ease-in-out;
}

.download-shape-1 {
    width: 400px;
    height: 400px;
    top: -200px;
    left: -100px;
}

.download-shape-2 {
    width: 300px;
    height: 300px;
    bottom: -150px;
    right: -50px;
    animation-delay: 7s;
}

.download-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
}

.download-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 16px;
}

.download-desc {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 40px;
}

.download-info {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.download-info-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.download-info-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.download-info-value {
    font-size: 1.3rem;
    font-weight: 700;
}

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

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 20px;
    background: white;
    color: var(--primary);
    padding: 24px 48px;
    border-radius: var(--radius-xl);
    font-weight: 700;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
    text-decoration: none;
}

.download-btn:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.download-btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 16px;
}

.download-btn-text {
    text-align: left;
}

.download-btn-title {
    display: block;
    font-size: 1.3rem;
    margin-bottom: 4px;
}

.download-btn-sub {
    display: block;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.download-tip {
    margin-top: 32px;
    font-size: 0.95rem;
    opacity: 0.85;
}

/* ===== 页脚 ===== */
.footer {
    background: #1a1a2e;
    color: #A0A0B0;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-logo {
    width: 50px;
    height: 50px;
    border-radius: 12px;
}

.footer-brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.footer-brand-desc {
    font-size: 0.95rem;
    line-height: 1.7;
}

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

.footer-title {
    color: white;
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.footer-link {
    color: #A0A0B0;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--secondary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}

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

.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-info {
        justify-content: center;
    }
    
    .phone-mockup {
        transform: scale(0.9);
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 8px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
        padding: 14px 20px;
    }
    
    .nav-download-btn {
        text-align: center;
    }
    
    .hero {
        padding: 100px 20px 60px;
    }
    
    .hero-info {
        flex-direction: column;
        gap: 16px;
        padding: 20px;
    }
    
    .info-divider {
        width: 40px;
        height: 1px;
    }
    
    .screenshot-grid {
        grid-template-columns: 1fr;
        max-width: 350px;
        margin: 0 auto;
    }
    
    .download-info {
        gap: 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .phone-mockup {
        transform: scale(0.75);
    }
    
    .floating-tag {
        font-size: 0.8rem;
        padding: 8px 14px;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    
    .download-btn {
        flex-direction: column;
        text-align: center;
        padding: 20px 32px;
    }
    
    .phone-frame {
        width: 240px;
        height: 480px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}