/* 抖阴短视频应用官网样式 */

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #000;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
}

.brand-icon {
    font-size: 2em;
    animation: pulse 2s infinite;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.5em;
    font-weight: 700;
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-subtitle {
    font-size: 0.8em;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #4ecdc4;
    background: rgba(78, 205, 196, 0.1);
    transform: translateY(-2px);
}

.nav-actions .download-btn {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9em;
}

.nav-actions .download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.4);
}

/* 英雄区域样式 */
.hero-section {
    min-height: 100vh;
    background: linear-gradient(135deg, #000 0%, #1a1a2e 50%, #16213e 100%);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(255, 107, 107, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(78, 205, 196, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    min-height: 80vh;
}

.hero-text {
    z-index: 2;
}

.hero-title {
    margin-bottom: 30px;
}

.title-main {
    display: block;
    font-size: 4em;
    font-weight: 800;
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    animation: fadeInUp 1s ease;
}

.title-sub {
    display: block;
    font-size: 1.5em;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-description {
    font-size: 1.1em;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 40px;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 50px;
    animation: fadeInUp 1s ease 0.6s both;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.stat-number {
    display: block;
    font-size: 2.5em;
    font-weight: 700;
    color: #4ecdc4;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.7);
}

.hero-actions {
    display: flex;
    gap: 20px;
    animation: fadeInUp 1s ease 0.8s both;
}

.cta-primary,
.cta-secondary {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.1em;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.cta-primary {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    color: white;
}

.cta-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-primary:hover,
.cta-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

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

/* 手机模型样式 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    animation: fadeInUp 1s ease 1s both;
}

.phone-mockup {
    position: relative;
    z-index: 2;
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: linear-gradient(135deg, #2c3e50, #34495e);
    border-radius: 35px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background: #34495e;
    border-radius: 3px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 25px;
    overflow: hidden;
    position: relative;
}

.app-interface {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
    display: flex;
    flex-direction: column;
}

.video-player {
    flex: 1;
    position: relative;
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-content {
    width: 100%;
    height: 100%;
    position: relative;
}

.video-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.play-button {
    font-size: 3em;
    color: white;
    opacity: 0.8;
    animation: pulse 2s infinite;
}

.video-controls {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 20px;
    z-index: 3;
}

.control-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.control-item:hover {
    transform: scale(1.1);
}

.control-icon {
    font-size: 1.5em;
}

.control-count {
    font-size: 0.7em;
    font-weight: 600;
}

.bottom-nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 15px 0;
    background: rgba(0, 0, 0, 0.8);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.8em;
}

.nav-item {
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-item.active {
    color: #4ecdc4;
}

.nav-item.create {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    color: white;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2em;
    font-weight: 600;
}

/* 浮动元素 */
.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.floating-item {
    position: absolute;
    font-size: 2em;
    opacity: 0.6;
    animation: float 6s ease-in-out infinite;
    animation-delay: var(--delay);
}

.floating-item:nth-child(1) { top: 20%; left: 10%; }
.floating-item:nth-child(2) { top: 60%; left: 5%; }
.floating-item:nth-child(3) { top: 30%; right: 10%; }
.floating-item:nth-child(4) { top: 70%; right: 15%; }
.floating-item:nth-child(5) { top: 10%; right: 30%; }
.floating-item:nth-child(6) { top: 80%; left: 20%; }

/* 功能特色样式 */
.features-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 3em;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    position: relative;
}

.title-icon {
    font-size: 1.2em;
    animation: bounce 2s infinite;
}

.title-decoration {
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2em;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 400;
}

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

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1), rgba(78, 205, 196, 0.1));
    opacity: 0;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border-color: rgba(78, 205, 196, 0.3);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    font-size: 4em;
    margin-bottom: 25px;
    position: relative;
    z-index: 2;
}

.feature-title {
    font-size: 1.5em;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.feature-description {
    font-size: 1em;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 25px;
    position: relative;
    z-index: 2;
}

.feature-highlights {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.highlight {
    background: rgba(78, 205, 196, 0.2);
    color: #4ecdc4;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.8em;
    font-weight: 500;
    border: 1px solid rgba(78, 205, 196, 0.3);
}

/* 下载区域样式 */
.download-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #16213e 0%, #0f0f23 100%);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.download-title {
    font-size: 3em;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
}

.download-subtitle {
    font-size: 1.3em;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
}

.download-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 50px;
}

.download-feature {
    display: flex;
    align-items: center;
    gap: 15px;
}

.feature-icon {
    font-size: 1.5em;
}

.feature-text {
    font-size: 1.1em;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 25px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(78, 205, 196, 0.5);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.download-btn .btn-icon {
    font-size: 2em;
}

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

.btn-label {
    font-size: 0.8em;
    color: rgba(255, 255, 255, 0.7);
}

.btn-store {
    font-size: 1.1em;
    font-weight: 600;
}

.download-info-text {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9em;
    line-height: 1.6;
}

.download-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.qr-code-container {
    text-align: center;
}

.qr-code {
    width: 200px;
    height: 200px;
    background: white;
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.qr-pattern {
    width: 100%;
    height: 100%;
    position: relative;
    background: 
        linear-gradient(90deg, #000 50%, transparent 50%),
        linear-gradient(#000 50%, transparent 50%);
    background-size: 10px 10px;
}

.qr-corner {
    position: absolute;
    width: 30px;
    height: 30px;
    border: 3px solid #000;
}

.qr-corner:nth-child(1) { top: 0; left: 0; }
.qr-corner:nth-child(2) { top: 0; right: 0; }
.qr-corner:nth-child(3) { bottom: 0; left: 0; }
.qr-corner:nth-child(4) { bottom: 0; right: 0; }

.qr-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #000;
}

.qr-logo {
    font-size: 1.5em;
}

.qr-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1em;
    font-weight: 500;
}

.download-stats {
    display: flex;
    gap: 30px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 2em;
    color: #4ecdc4;
}

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

.stat-number {
    font-size: 1.5em;
    font-weight: 700;
    color: white;
}

.stat-label {
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.7);
}

/* 用户评价样式 */
.reviews-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 100%);
}

.reviews-container {
    margin-top: 60px;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.review-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.3s ease;
}

.review-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(78, 205, 196, 0.3);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.user-avatar {
    flex-shrink: 0;
}

.user-avatar img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #4ecdc4;
}

.user-info {
    flex: 1;
}

.user-name {
    font-size: 1.1em;
    font-weight: 600;
    color: white;
    margin-bottom: 5px;
}

.user-rating {
    display: flex;
    align-items: center;
    gap: 8px;
}

.stars {
    color: #ffd700;
    font-size: 0.9em;
}

.rating-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9em;
    font-weight: 500;
}

.review-date {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.8em;
}

.review-content {
    margin-bottom: 20px;
}

.review-content p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    font-size: 1em;
}

.review-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.review-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: rgba(78, 205, 196, 0.2);
    color: #4ecdc4;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75em;
    font-weight: 500;
    border: 1px solid rgba(78, 205, 196, 0.3);
}

.review-helpful {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.8em;
}

.helpful-text {
    display: flex;
    align-items: center;
    gap: 5px;
}

.reviews-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.summary-stats {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.overall-rating {
    margin-bottom: 30px;
}

.rating-score {
    font-size: 4em;
    font-weight: 700;
    color: #4ecdc4;
    margin-bottom: 10px;
}

.rating-stars {
    font-size: 1.5em;
    color: #ffd700;
    margin-bottom: 10px;
}

.rating-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1em;
}

.rating-breakdown {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.rating-row {
    display: flex;
    align-items: center;
    gap: 15px;
}

.rating-label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9em;
    min-width: 30px;
}

.rating-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.rating-fill {
    height: 100%;
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.rating-percent {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.8em;
    min-width: 35px;
    text-align: right;
}

.review-highlights h4 {
    color: white;
    font-size: 1.2em;
    margin-bottom: 20px;
}

.highlight-tags {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.highlight-tag {
    background: rgba(255, 107, 107, 0.2);
    color: #ff6b6b;
    padding: 8px 15px;
    border-radius: 15px;
    font-size: 0.9em;
    font-weight: 500;
    border: 1px solid rgba(255, 107, 107, 0.3);
    text-align: center;
}

/* 关于我们样式 */
.about-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-title {
    font-size: 3em;
    font-weight: 700;
    color: white;
    margin-bottom: 30px;
}

.about-description {
    font-size: 1.2em;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 50px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.about-feature {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.about-feature .feature-icon {
    font-size: 2em;
    color: #4ecdc4;
    flex-shrink: 0;
}

.feature-content h4 {
    font-size: 1.3em;
    font-weight: 600;
    color: white;
    margin-bottom: 10px;
}

.feature-content p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.about-stats {
    display: flex;
    justify-content: center;
    align-items: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.about-stats .stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.about-stats .stat-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.about-stats .stat-icon {
    font-size: 3em;
    color: #ff6b6b;
    margin-bottom: 15px;
}

.about-stats .stat-number {
    font-size: 2.5em;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
}

.about-stats .stat-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1em;
}

/* 页脚样式 */
.footer {
    background: linear-gradient(135deg, #0f0f23 0%, #000 100%);
    color: white;
    padding: 80px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 50px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5em;
    font-weight: 700;
}

.brand-icon {
    font-size: 1.2em;
}

.brand-name {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    font-size: 1em;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 1.2em;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-link:hover {
    background: rgba(78, 205, 196, 0.2);
    border-color: rgba(78, 205, 196, 0.5);
    color: #4ecdc4;
    transform: translateY(-3px);
}

.footer-title {
    font-size: 1.2em;
    font-weight: 600;
    margin-bottom: 25px;
    color: #4ecdc4;
}

.link-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.link-list a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.95em;
}

.link-list a:hover {
    color: #4ecdc4;
    padding-left: 5px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9em;
}

.footer-legal {
    display: flex;
    gap: 25px;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.footer-legal a:hover {
    color: #4ecdc4;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2em;
    font-weight: 600;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 5px 20px rgba(255, 107, 107, 0.4);
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.6);
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

@keyframes pulse {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.05);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    33% {
        transform: translateY(-20px) rotate(120deg);
    }
    66% {
        transform: translateY(10px) rotate(240deg);
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .download-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .reviews-summary {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .title-main {
        font-size: 3em;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        align-items: center;
    }
    
    .download-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .title-main {
        font-size: 2.5em;
    }
    
    .section-title {
        font-size: 2.5em;
    }
    
    .phone-frame {
        width: 240px;
        height: 480px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .review-card {
        padding: 20px;
    }
}