/* ========================================
   鸥易平台 - 全局样式
   加密货币交易平台风格
   ======================================== */

/* CSS变量 - 设计系统 */
:root {
    --color-primary: #00d4ff;
    --color-primary-dark: #0099cc;
    --color-secondary: #7c3aed;
    --color-accent: #f472b6;
    --color-dark-bg: #060818;
    --color-darker-bg: #030412;
    --color-card-bg: rgba(255, 255, 255, 0.03);
    --color-card-border: rgba(0, 212, 255, 0.15);
    --color-text: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-gradient-start: #00d4ff;
    --color-gradient-end: #7c3aed;
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-dark: linear-gradient(180deg, #060818 0%, #030412 100%);
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.3);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --container-max: 1200px;
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-dark-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

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

ul, ol {
    list-style: none;
}

/* 容器 */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   导航栏
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(6, 8, 24, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.site-header.scrolled {
    background: rgba(3, 4, 18, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 20px;
    color: #fff;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    color: #fff;
    box-shadow: var(--shadow-glow);
}

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

/* 导航链接 */
.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 15px;
    padding: 8px 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
}

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

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* 下载按钮 */
.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--gradient-primary);
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.5);
    color: #fff;
}

/* ========================================
   Hero 主视觉区
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-height) + 60px) 0 80px;
    overflow: hidden;
    background: var(--gradient-dark);
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(124, 58, 237, 0.15) 0%, transparent 50%);
    animation: hero-bg-pulse 15s ease-in-out infinite;
}

@keyframes hero-bg-pulse {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-2%, -2%); }
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.hero-particles span {
    position: absolute;
    display: block;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--color-primary);
    animation: particle-float linear infinite;
}

@keyframes particle-float {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) scale(1);
        opacity: 0;
    }
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    animation: fadeInUp 1s ease;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.25);
    border-radius: 50px;
    font-size: 13px;
    color: var(--color-primary);
    margin-bottom: 28px;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
}

.hero h1 {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #ffffff 0%, var(--color-primary) 50%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: var(--gradient-primary);
    color: #fff;
    font-weight: 600;
    font-size: 16px;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(0, 212, 255, 0.6);
    color: #fff;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    font-weight: 500;
    font-size: 16px;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Hero 统计数据 */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

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

.stat-number {
    display: block;
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

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

/* Hero 右侧 - 手机展示 */
.hero-visual {
    position: relative;
    animation: fadeInRight 1s ease;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.phone-frame {
    position: relative;
    width: 300px;
    height: 600px;
    margin: 0 auto;
    background: linear-gradient(135deg, #1a1a2e 0%, #0f0f1e 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 80px rgba(0, 212, 255, 0.2);
    border: 2px solid rgba(0, 212, 255, 0.2);
}

.phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 24px;
    background: #0a0a14;
    border-radius: 0 0 16px 16px;
    z-index: 3;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--color-darker-bg);
    border-radius: 30px;
    overflow: hidden;
    position: relative;
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 30px;
}

.phone-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.3) 0%, transparent 70%);
    z-index: -1;
    animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 4s ease-in-out infinite;
}

.floating-card.card-1 {
    top: 10%;
    left: -30px;
    animation-delay: 0s;
}

.floating-card.card-2 {
    bottom: 20%;
    right: -30px;
    animation-delay: 1.5s;
}

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

.floating-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.floating-icon.green { background: rgba(16, 185, 129, 0.2); color: var(--color-success); }
.floating-icon.blue { background: rgba(0, 212, 255, 0.2); color: var(--color-primary); }

.floating-info .label {
    font-size: 12px;
    color: var(--color-text-muted);
}

.floating-info .value {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
}

/* ========================================
   通用Section标题
   ======================================== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50px;
    font-size: 13px;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-header p {
    font-size: 17px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   核心特性
   ======================================== */
.features {
    background: var(--color-darker-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.feature-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.4);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    background: rgba(0, 212, 255, 0.05);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(124, 58, 237, 0.2) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 28px;
    color: var(--color-primary);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #fff;
}

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

/* ========================================
   服务介绍 - 详细内容区
   ======================================== */
.services {
    background: var(--color-dark-bg);
}

.services-layout {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

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

.service-row.reverse {
    direction: rtl;
}

.service-row.reverse > * {
    direction: ltr;
}

.service-image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.service-image:hover img {
    transform: scale(1.05);
}

.service-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    pointer-events: none;
}

.service-content h3 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
}

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

.service-features-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.service-features-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text);
    font-size: 15px;
}

.service-features-list .check-icon {
    width: 24px;
    height: 24px;
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
}

/* ========================================
   产品展示区
   ======================================== */
.products {
    background: var(--color-darker-bg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
}

.product-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.product-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 50px rgba(0, 212, 255, 0.15);
}

.product-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-info {
    padding: 28px;
}

.product-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 50px;
    font-size: 12px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.product-info h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: #fff;
}

.product-info p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

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

.product-price {
    font-size: 22px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   下载区域
   ======================================== */
.download {
    background: var(--color-dark-bg);
    position: relative;
}

.download-wrapper {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08) 0%, rgba(124, 58, 237, 0.08) 100%);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-xl);
    padding: 60px;
    position: relative;
    overflow: hidden;
}

.download-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 60%);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.download-text h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 800;
    margin-bottom: 16px;
    color: #fff;
}

.download-text p {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 28px;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 28px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-primary);
    transform: translateX(8px);
}

.download-btn-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    flex-shrink: 0;
}

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

.download-btn-label {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 2px;
}

.download-btn-name {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

.download-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.qr-code {
    width: 200px;
    height: 200px;
    background: #fff;
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

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

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

/* ========================================
   用户评价
   ======================================== */
.testimonials {
    background: var(--color-darker-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}

.testimonial-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.testimonial-stars {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    color: var(--color-warning);
    font-size: 16px;
}

.testimonial-text {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info .author-name {
    font-weight: 600;
    color: #fff;
    font-size: 15px;
}

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

/* ========================================
   常见问题 FAQ
   ======================================== */
.faq {
    background: var(--color-dark-bg);
}

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

.faq-item {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item.open {
    border-color: var(--color-primary);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    cursor: pointer;
    transition: background var(--transition-fast);
    font-weight: 600;
    color: #fff;
    font-size: 16px;
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.03);
}

.faq-toggle {
    width: 28px;
    height: 28px;
    background: rgba(0, 212, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base);
    font-size: 18px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.faq-item.open .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
}

.faq-item.open .faq-answer {
    max-height: 500px;
}

.faq-answer-inner {
    padding: 0 28px 24px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    font-size: 15px;
}

/* ========================================
   行动号召 CTA
   ======================================== */
.cta {
    background: var(--color-darker-bg);
    position: relative;
}

.cta-wrapper {
    text-align: center;
    padding: 80px 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.cta-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 50%);
    animation: hero-bg-pulse 10s ease-in-out infinite;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta h2 {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    margin-bottom: 16px;
    color: #fff;
}

.cta p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn-white {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 40px;
    background: #fff;
    color: var(--color-primary-dark);
    font-weight: 700;
    font-size: 16px;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    color: var(--color-secondary);
}

/* ========================================
   页脚
   ======================================== */
.site-footer {
    background: var(--color-darker-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 80px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand p {
    margin-top: 20px;
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.7;
    max-width: 300px;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    font-size: 18px;
}

.footer-social a:hover {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 24px;
}

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

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 14px;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

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

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 13px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

/* ========================================
   内页 Banner
   ======================================== */
.page-banner {
    position: relative;
    padding: calc(var(--header-height) + 80px) 0 60px;
    background: var(--gradient-dark);
    overflow: hidden;
    text-align: center;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 60%);
}

.banner-content {
    position: relative;
    z-index: 2;
}

.banner-content h1 {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-content p {
    font-size: 17px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
    font-size: 14px;
    color: var(--color-text-muted);
}

.breadcrumb a {
    color: var(--color-text-secondary);
}

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

.breadcrumb .separator {
    opacity: 0.5;
}

/* ========================================
   新闻列表页
   ======================================== */
.news-list-section {
    padding: 80px 0;
    background: var(--color-dark-bg);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.news-item {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 32px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.news-item:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.news-item-image {
    aspect-ratio: 1;
    overflow: hidden;
}

.news-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.news-item:hover .news-item-image img {
    transform: scale(1.05);
}

.news-item-content {
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-item-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.news-item-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #fff;
    line-height: 1.5;
    transition: color var(--transition-fast);
}

.news-item:hover h3 {
    color: var(--color-primary);
}

.news-item p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    transition: gap var(--transition-fast);
}

.read-more:hover {
    gap: 12px;
    color: var(--color-primary-dark);
}

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 48px;
}

.pagination a,
.pagination span {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.pagination a:hover,
.pagination .current {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
}

.pagination .disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ========================================
   新闻详情页
   ======================================== */
.news-detail-section {
    padding: 80px 0;
    background: var(--color-dark-bg);
}

.news-detail-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
}

.news-detail-article {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: 48px;
}

.news-detail-header {
    margin-bottom: 36px;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.news-detail-header h1 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 800;
    color: #fff;
    line-height: 1.4;
    margin-bottom: 20px;
}

.news-detail-meta {
    display: flex;
    gap: 24px;
    font-size: 14px;
    color: var(--color-text-muted);
}

.news-detail-cover {
    margin-bottom: 36px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.news-detail-cover img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.news-detail-body {
    font-size: 16px;
    line-height: 1.9;
    color: var(--color-text);
}

.news-detail-body h2 {
    font-size: 24px;
    font-weight: 700;
    margin: 36px 0 16px;
    color: #fff;
}

.news-detail-body h3 {
    font-size: 19px;
    font-weight: 600;
    margin: 28px 0 12px;
    color: var(--color-primary);
}

.news-detail-body p {
    margin-bottom: 18px;
    color: var(--color-text-secondary);
}

.news-detail-body ul {
    margin: 16px 0;
    padding-left: 20px;
}

.news-detail-body ul li {
    list-style: disc;
    margin-bottom: 10px;
    color: var(--color-text-secondary);
}

/* 侧边栏 */
.sidebar-widget {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 28px;
}

.sidebar-widget h3 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-news-item {
    display: flex;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-news-item:last-child {
    border-bottom: none;
}

.sidebar-news-thumb {
    width: 80px;
    height: 60px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
}

.sidebar-news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sidebar-news-title {
    font-size: 14px;
    color: var(--color-text);
    line-height: 1.5;
    margin-bottom: 6px;
    transition: color var(--transition-fast);
}

.sidebar-news-item:hover .sidebar-news-title {
    color: var(--color-primary);
}

.sidebar-news-date {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ========================================
   关于页面
   ======================================== */
.about-content {
    padding: 80px 0;
    background: var(--color-dark-bg);
}

.about-story {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-story h2 {
    font-size: clamp(26px, 3vw, 36px);
    font-weight: 700;
    color: #fff;
    margin-bottom: 24px;
}

.about-story p {
    font-size: 17px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 数据统计 */
.about-stats {
    padding: 80px 0;
    background: var(--color-darker-bg);
}

.about-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.stat-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-primary);
}

.stat-card .icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.stat-card .number {
    font-size: clamp(32px, 4vw, 44px);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

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

/* 价值观 */
.values-section {
    padding: 80px 0;
    background: var(--color-dark-bg);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.value-card {
    text-align: center;
    padding: 40px 32px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.value-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    background: rgba(0, 212, 255, 0.05);
}

.value-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.value-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

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

/* 团队 */
.team-section {
    padding: 80px 0;
    background: var(--color-darker-bg);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 28px;
}

.team-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    text-align: center;
}

.team-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-primary);
}

.team-photo {
    aspect-ratio: 1;
    overflow: hidden;
}

.team-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.team-info {
    padding: 24px;
}

.team-info h4 {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
}

.team-info .role {
    font-size: 14px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.team-info p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ========================================
   联系页面
   ======================================== */
.contact-section {
    padding: 80px 0;
    background: var(--color-dark-bg);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact-info {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-info h2 {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.contact-info > p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item .icon {
    width: 48px;
    height: 48px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* 联系表单 */
.contact-form-wrapper {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 15px;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(0, 212, 255, 0.05);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 18px center;
}

/* ========================================
   产品详情/列表页
   ======================================== */
.products-section {
    padding: 80px 0;
    background: var(--color-dark-bg);
}

.product-filter {
    display: flex;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 10px 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
}

/* 产品详情卡 */
.product-detail-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 28px;
}

.product-detail-header {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 36px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.product-detail-icon {
    width: 180px;
    height: 180px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.product-detail-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-detail-info h3 {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
}

.product-detail-info .price {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.product-detail-info .desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.product-specs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: 14px 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    font-size: 14px;
}

.spec-item .label {
    color: var(--color-text-muted);
}

.spec-item .value {
    color: var(--color-text);
    font-weight: 600;
}

/* ========================================
   回到顶部
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.6);
}

/* ========================================
   滚动动画
   ======================================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-stats {
        text-align: center;
    }

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

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

    .service-row {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .service-row.reverse {
        direction: ltr;
    }

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

    .news-detail-wrapper {
        grid-template-columns: 1fr;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .news-item {
        grid-template-columns: 200px 1fr;
        gap: 24px;
    }

    .product-detail-header {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .product-detail-icon {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(3, 4, 18, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 32px 24px;
        gap: 20px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-link {
        font-size: 16px;
        text-align: center;
    }

    .hero {
        min-height: auto;
        padding: calc(var(--header-height) + 40px) 0 60px;
    }

    .hero-badge {
        font-size: 12px;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .phone-frame {
        width: 240px;
        height: 480px;
    }

    .floating-card.card-1 {
        left: -10px;
    }

    .floating-card.card-2 {
        right: -10px;
    }

    .features-grid {
        gap: 20px;
    }

    .download-wrapper {
        padding: 40px 24px;
    }

    .cta-wrapper {
        padding: 50px 24px;
    }

    .news-item {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .news-item-image {
        aspect-ratio: 16/9;
    }

    .news-item-content {
        padding: 24px;
    }

    .news-detail-article {
        padding: 28px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .contact-info,
    .contact-form-wrapper {
        padding: 28px;
    }

    .product-detail-card {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn-primary,
    .hero-cta .btn-secondary {
        width: 100%;
        justify-content: center;
    }

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

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

/* ========================================
   动画 Keyframes
   ======================================== */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.slide-up {
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}