/* ===== 全局变量与重置 ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #06b6d4;
    --accent: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    --text-light: #6b7280;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    --border: #e5e7eb;
    --border-light: #f3f4f6;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

.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;
    padding: 16px 0;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

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

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

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 22px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

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

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

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

.nav-download-btn {
    background: var(--primary);
    color: white !important;
    padding: 10px 24px;
    border-radius: var(--radius-full);
    font-weight: 600 !important;
}

.nav-download-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

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

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    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);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    padding: 20px;
    box-shadow: var(--shadow-md);
    flex-direction: column;
    gap: 16px;
    z-index: 999;
}

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

.mobile-menu a {
    font-size: 16px;
    font-weight: 500;
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
}

.mobile-download-btn {
    background: var(--primary) !important;
    color: white !important;
    text-align: center;
    border-radius: var(--radius-full) !important;
    padding: 14px 24px !important;
    margin-top: 8px;
    border: none !important;
}

/* ===== Hero区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    padding: 120px 0 80px;
    overflow: hidden;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

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

.hero-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 8s ease-in-out infinite;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: rgba(37, 99, 235, 0.15);
    top: -100px;
    right: -100px;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: rgba(139, 92, 246, 0.12);
    bottom: 0;
    left: -50px;
    animation-delay: -4s;
}

.blob-3 {
    width: 250px;
    height: 250px;
    background: rgba(6, 182, 212, 0.1);
    top: 40%;
    left: 30%;
    animation-delay: -2s;
}

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

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 520px;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: var(--radius-full);
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
}

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

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.5);
}

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

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 6px;
}

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

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

/* 手机模型 */
.hero-visual {
    display: flex;
    justify-content: center;
    position: relative;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.phone-mockup {
    position: relative;
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: linear-gradient(145deg, #1f2937, #111827);
    border-radius: 44px;
    padding: 12px;
    box-shadow: 
        0 50px 100px -20px rgba(0, 0, 0, 0.25),
        0 30px 60px -30px rgba(37, 99, 235, 0.3),
        inset 0 0 0 2px rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 1;
}

.phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 28px;
    background: #1f2937;
    border-radius: 0 0 20px 20px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 34px;
    overflow: hidden;
    padding: 40px 20px 20px;
}

.screen-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.screen-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.screen-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
}

.screen-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.screen-subtitle {
    font-size: 13px;
    color: var(--text-muted);
}

.screen-card {
    background: white;
    border-radius: 16px;
    padding: 16px;
    box-shadow: var(--shadow-sm);
}

.main-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
}

.card-title {
    font-size: 13px;
    opacity: 0.9;
    margin-bottom: 4px;
}

.card-value {
    font-size: 36px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
}

.card-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
    overflow: hidden;
}

.card-bar-fill {
    height: 100%;
    background: white;
    border-radius: 3px;
}

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

.grid-item {
    background: white;
    border-radius: 12px;
    padding: 12px 4px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.grid-icon {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 6px;
    font-size: 16px;
}

.grid-icon.blue { background: rgba(37, 99, 235, 0.1); }
.grid-icon.green { background: rgba(16, 185, 129, 0.1); }
.grid-icon.orange { background: rgba(245, 158, 11, 0.1); }
.grid-icon.purple { background: rgba(139, 92, 246, 0.1); }

.grid-item span {
    font-size: 11px;
    color: var(--text-secondary);
}

.screen-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.list-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: white;
    padding: 10px 12px;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
}

.list-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.list-dot.blue { background: var(--primary); }
.list-dot.green { background: var(--success); }

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

.floating-card {
    position: absolute;
    background: white;
    padding: 12px 16px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: floatCard 4s ease-in-out infinite;
    z-index: 2;
}

.card-1 {
    top: 80px;
    right: -40px;
    animation-delay: 0s;
}

.card-2 {
    bottom: 120px;
    left: -50px;
    animation-delay: -2s;
}

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

.float-icon {
    font-size: 24px;
}

.float-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.float-desc {
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== 通用区块样式 ===== */
section {
    padding: 100px 0;
}

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

.section-header.left {
    text-align: left;
}

.section-tag {
    display: inline-block;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.section-header.left .section-desc {
    margin: 0;
}

/* ===== 功能特性 ===== */
.features {
    background: var(--bg-secondary);
}

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

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

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

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

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

.blue-gradient { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.green-gradient { background: linear-gradient(135deg, #34d399, #10b981); }
.orange-gradient { background: linear-gradient(135deg, #fbbf24, #f59e0b); }
.purple-gradient { background: linear-gradient(135deg, #a78bfa, #8b5cf6); }
.pink-gradient { background: linear-gradient(135deg, #f472b6, #ec4899); }
.cyan-gradient { background: linear-gradient(135deg, #22d3ee, #06b6d4); }

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

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

/* ===== 产品优势 ===== */
.advantages .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.advantage-list {
    display: flex;
    flex-direction: column;
    gap: 28px;
    margin-top: 40px;
}

.advantage-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.advantage-number {
    font-size: 48px;
    font-weight: 900;
    line-height: 1;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.8;
    flex-shrink: 0;
}

.advantage-text h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

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

.advantages-visual {
    position: relative;
}

.screenshot-card {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 8px solid white;
}

.screenshot-card img {
    width: 100%;
    height: auto;
    display: block;
}

.trusted-badge {
    position: absolute;
    bottom: -20px;
    right: 20px;
    background: white;
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
}

.badge-icon {
    width: 40px;
    height: 40px;
    background: var(--success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    font-weight: bold;
}

.trusted-badge span {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 16px;
}

/* ===== 用户评价 ===== */
.reviews {
    background: var(--bg-secondary);
}

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

.review-card {
    background: white;
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.review-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.review-stars {
    color: #f59e0b;
    font-size: 18px;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.review-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

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

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 18px;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 16px;
}

.author-meta {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== 下载区域 ===== */
.download-section {
    position: relative;
    padding: 100px 0;
}

.download-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #1e40af 0%, #7c3aed 50%, #2563eb 100%);
    opacity: 0.97;
}

.download-card {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    padding: 64px;
    text-align: center;
    box-shadow: var(--shadow-xl);
    max-width: 800px;
    margin: 0 auto;
}

.download-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.download-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.download-methods {
    margin-bottom: 32px;
}

.method-tabs {
    display: inline-flex;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    padding: 4px;
    margin-bottom: 32px;
}

.method-tab {
    padding: 10px 24px;
    border-radius: var(--radius-full);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.method-tab.active {
    background: white;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.method-content {
    display: none;
}

.method-content.active {
    display: block;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 28px;
    border-radius: var(--radius);
    color: white;
    transition: var(--transition);
    min-width: 200px;
}

.ios-btn {
    background: #1f2937;
}

.ios-btn:hover {
    background: #111827;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.android-btn {
    background: linear-gradient(135deg, #34d399, #10b981);
}

.android-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

.download-btn-icon {
    width: 32px;
    height: 32px;
}

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

.btn-subtitle {
    display: block;
    font-size: 12px;
    opacity: 0.8;
    margin-bottom: 2px;
}

.btn-title {
    display: block;
    font-size: 20px;
    font-weight: 600;
}

.qrcode-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.qrcode-placeholder {
    width: 200px;
    height: 200px;
    background: white;
    border: 4px solid var(--border);
    border-radius: var(--radius);
    position: relative;
    padding: 16px;
}

.qrcode-pattern {
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(90deg, #1f2937 25%, transparent 25%, transparent 75%, #1f2937 75%),
        linear-gradient(#1f2937 25%, transparent 25%, transparent 75%, #1f2937 75%);
    background-size: 16px 16px;
    position: relative;
}

.qr-corner {
    position: absolute;
    width: 40px;
    height: 40px;
    border: 8px solid #1f2937;
}

.qr-corner.tl { top: 0; left: 0; border-right: none; border-bottom: none; }
.qr-corner.tr { top: 0; right: 0; border-left: none; border-bottom: none; }
.qr-corner.bl { bottom: 0; left: 0; border-right: none; border-top: none; }

.qr-dots {
    position: absolute;
    inset: 48px;
    background-image: radial-gradient(circle, #1f2937 2px, transparent 2px);
    background-size: 12px 12px;
    opacity: 0.6;
}

.qr-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    background: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 0 8px white;
}

.qr-logo {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 20px;
}

.qrcode-tip {
    font-size: 15px;
    color: var(--text-secondary);
}

.version-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 14px;
    color: var(--text-muted);
}

.version-dot {
    color: var(--border);
}

/* ===== 页脚 ===== */
.footer {
    background: #1f2937;
    color: white;
    padding: 64px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 2fr;
    gap: 60px;
    margin-bottom: 48px;
}

.footer-brand .logo-text {
    color: white;
}

.footer-desc {
    margin-top: 16px;
    color: #9ca3af;
    font-size: 15px;
    line-height: 1.7;
    max-width: 400px;
}

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

.link-group h5 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.link-group a {
    display: block;
    font-size: 14px;
    color: #9ca3af;
    margin-bottom: 12px;
}

.link-group a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid #374151;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: #6b7280;
}

/* ===== 响应式适配 - 平板 ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 42px;
    }
    
    .hero-container {
        gap: 40px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages .container {
        gap: 40px;
    }
    
    .phone-frame {
        width: 240px;
        height: 480px;
    }
    
    .download-card {
        padding: 48px 32px;
    }
}

/* ===== 响应式适配 - 移动端 ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    
    .hero-badge {
        margin: 0 auto 20px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-desc {
        font-size: 16px;
        margin: 0 auto 28px;
    }
    
    .hero-buttons {
        justify-content: center;
        margin-bottom: 32px;
    }
    
    .btn {
        padding: 14px 24px;
        font-size: 15px;
    }
    
    .hero-stats {
        justify-content: center;
        gap: 24px;
    }
    
    .stat-number {
        font-size: 24px;
    }
    
    .stat-label {
        font-size: 13px;
    }
    
    .floating-card {
        transform: scale(0.85);
    }
    
    .card-1 {
        right: -20px;
    }
    
    .card-2 {
        left: -20px;
    }
    
    section {
        padding: 64px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-desc {
        font-size: 16px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .advantages .container {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .section-header.left {
        text-align: center;
    }
    
    .section-header.left .section-desc {
        margin: 0 auto;
    }
    
    .advantage-number {
        font-size: 36px;
    }
    
    .advantage-text h4 {
        font-size: 18px;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .review-card {
        padding: 24px;
    }
    
    .download-card {
        padding: 32px 24px;
        border-radius: var(--radius-lg);
    }
    
    .download-title {
        font-size: 26px;
    }
    
    .download-desc {
        font-size: 16px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 240px;
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    
    .link-group h5 {
        font-size: 14px;
    }
    
    .version-info {
        font-size: 12px;
    }
}

/* ===== 响应式适配 - 小屏手机 ===== */
@media (max-width: 380px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
}