/* 基础样式 */
:root {
    --primary-color: #0071e3;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --accent-color: #667eea;
    --text-color: #1d1d1f;
    --light-text: #86868b;
    --background-color: #ffffff;
    --section-bg: #fbfbfd;
    --dark-bg: #0a0a1a;
    --border-color: #d2d2d7;
    --transition: all 0.3s ease;
}

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

body {
    font-family: "SF Pro Display", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.5;
    overflow-x: hidden;
}

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

a:hover {
    opacity: 0.8;
}

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

ul {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
}

h1 {
    font-size: 56px;
    line-height: 1.08;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 44px;
    text-align: center;
    margin-bottom: 20px;
    letter-spacing: -0.015em;
}

h3 {
    font-size: 32px;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

section {
    padding: 100px 20px;
}

/* 导航栏 */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 40px;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.logo {
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: var(--text-color);
    font-weight: 400;
    font-size: 14px;
    opacity: 0.8;
    transition: var(--transition);
}

.nav-links a:hover {
    opacity: 1;
    color: var(--accent-color);
}

/* 英雄区域 */
header {
    background: var(--dark-bg);
    overflow: hidden;
}

.hero {
    min-height: 92vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 60px 80px;
    gap: 60px;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    flex: 1;
    z-index: 2;
}

.hero h1 {
    color: #ffffff;
    font-size: 64px;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #ffffff 0%, #a78bfa 50%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 20px;
    margin: 0 0 40px;
    max-width: 520px;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 14px 36px;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.cta-button:hover {
    transform: scale(1.04);
    opacity: 1;
    box-shadow: 0 6px 30px rgba(102, 126, 234, 0.6);
}

/* Hero 3D视觉 */
.hero-visual {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 800px;
}

.hero-3d-mockup {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mockup-cube {
    width: 150px;
    height: 150px;
    position: relative;
    transform-style: preserve-3d;
    animation: rotateCube 8s ease-in-out infinite;
}

.cube-face {
    position: absolute;
    width: 150px;
    height: 150px;
    border: 2px solid rgba(102, 126, 234, 0.5);
    background: rgba(102, 126, 234, 0.08);
    backdrop-filter: blur(4px);
}

.cube-face.front  { transform: translateZ(75px); }
.cube-face.back   { transform: rotateY(180deg) translateZ(75px); }
.cube-face.left   { transform: rotateY(-90deg) translateZ(75px); }
.cube-face.right  { transform: rotateY(90deg) translateZ(75px); }
.cube-face.top    { transform: rotateX(90deg) translateZ(75px); }
.cube-face.bottom { transform: rotateX(-90deg) translateZ(75px); }

@keyframes rotateCube {
    0%   { transform: rotateX(-20deg) rotateY(0deg); }
    25%  { transform: rotateX(-10deg) rotateY(90deg); }
    50%  { transform: rotateX(-20deg) rotateY(180deg); }
    75%  { transform: rotateX(-10deg) rotateY(270deg); }
    100% { transform: rotateX(-20deg) rotateY(360deg); }
}

.scan-line {
    position: absolute;
    top: 0;
    left: -20%;
    width: 140%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #667eea, transparent);
    animation: scanLine 3s linear infinite;
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.8);
}

@keyframes scanLine {
    0%   { top: 0%; opacity: 1; }
    50%  { opacity: 0.5; }
    100% { top: 100%; opacity: 1; }
}

.scan-dots {
    position: absolute;
    inset: 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding: 40px;
}

.scan-dots span {
    width: 8px;
    height: 8px;
    background: rgba(102, 126, 234, 0.6);
    border-radius: 50%;
    animation: dotPulse 2s ease-in-out infinite;
}

.scan-dots span:nth-child(1) { animation-delay: 0s; }
.scan-dots span:nth-child(2) { animation-delay: 0.2s; }
.scan-dots span:nth-child(3) { animation-delay: 0.4s; }
.scan-dots span:nth-child(4) { animation-delay: 0.6s; }
.scan-dots span:nth-child(5) { animation-delay: 0.8s; }
.scan-dots span:nth-child(6) { animation-delay: 1s; }
.scan-dots span:nth-child(7) { animation-delay: 1.2s; }
.scan-dots span:nth-child(8) { animation-delay: 1.4s; }
.scan-dots span:nth-child(9) { animation-delay: 1.6s; }

@keyframes dotPulse {
    0%, 100% { opacity: 0.2; transform: scale(0.8); }
    50%      { opacity: 1; transform: scale(1.2); }
}

/* 功能区域 */
.features-section {
    background-color: var(--background-color);
    padding: 120px 20px;
}

.features-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 80px;
    font-size: 19px;
    color: var(--light-text);
    line-height: 1.6;
}

.feature-category {
    max-width: 1200px;
    margin: 0 auto 80px;
}

.feature-category:last-child {
    margin-bottom: 0;
}

.category-title {
    font-size: 24px;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
    width: 100%;
}

.category-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    margin: 12px auto 0;
    border-radius: 2px;
}

.recognition-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.recognition-card {
    background-color: var(--section-bg);
    border-radius: 20px;
    padding: 36px 28px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
}

.recognition-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.recognition-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.2);
}

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

.recognition-icon {
    margin: 0 auto 24px;
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-radius: 20px;
    transition: var(--transition);
}

.recognition-card:hover .recognition-icon {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
    transform: scale(1.05);
}

.recognition-icon img {
    width: 36px;
    height: 36px;
}

.recognition-card h3 {
    margin-bottom: 14px;
    font-size: 20px;
    font-weight: 600;
}

.recognition-card p {
    color: var(--light-text);
    font-size: 15px;
    line-height: 1.6;
}

/* 技术部分 */
.technology {
    background-color: var(--dark-bg);
    padding: 120px 20px;
    color: #ffffff;
}

.technology h2 {
    background: linear-gradient(135deg, #ffffff, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tech-showcase {
    display: flex;
    gap: 80px;
    max-width: 1200px;
    margin: 60px auto 0;
    align-items: center;
}

.tech-content {
    flex: 1;
}

.tech-content h3 {
    font-size: 40px;
    margin-bottom: 28px;
    line-height: 1.15;
    color: #ffffff;
}

.tech-content p {
    font-size: 17px;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

.explore-button {
    display: inline-block;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 13px 32px;
    border-radius: 980px;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.explore-button:hover {
    transform: scale(1.04);
    opacity: 1;
    box-shadow: 0 6px 30px rgba(102, 126, 234, 0.6);
}

/* 技术视觉 */
.tech-image {
    flex: 1;
}

.tech-visual {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    max-width: 400px;
    margin: 0 auto;
    border-radius: 24px;
    background: rgba(102, 126, 234, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.2);
    overflow: hidden;
}

.point-cloud {
    position: absolute;
    inset: 0;
}

.cloud-dot {
    position: absolute;
    width: 10px;
    height: 10px;
    background: radial-gradient(circle, #667eea, rgba(102, 126, 234, 0.3));
    border-radius: 50%;
    animation: cloudDotPulse 3s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

.cloud-dot:nth-child(odd)  { animation-delay: 0.5s; }
.cloud-dot:nth-child(even) { animation-delay: 1s; }

@keyframes cloudDotPulse {
    0%, 100% { opacity: 0.4; transform: scale(0.8); }
    50%      { opacity: 1; transform: scale(1.3); }
}

.mesh-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(102, 126, 234, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 126, 234, 0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    animation: meshShift 10s linear infinite;
}

@keyframes meshShift {
    0%   { transform: translateX(0) translateY(0); }
    100% { transform: translateX(30px) translateY(30px); }
}

/* 数据统计 */
.tech-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    max-width: 1000px;
    margin: 80px auto 0;
    padding-top: 60px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.stat-number {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.5);
}

/* 下载区域 */
.download {
    background-color: var(--section-bg);
    padding: 120px 20px;
}

.download-options {
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
}

.download-header {
    text-align: center;
    margin-bottom: 60px;
}

.download-header h3 {
    font-size: 36px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download-subtitle {
    font-size: 18px;
    color: var(--light-text);
}

/* 设备预览 */
.download-content {
    display: flex;
    align-items: center;
    gap: 80px;
    margin-bottom: 80px;
}

.device-preview {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.device-frame {
    width: 260px;
    height: 520px;
    border-radius: 40px;
    background: #1d1d1f;
    padding: 12px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.device-frame:hover {
    transform: translateY(-10px);
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.15);
}

.device-screen {
    width: 100%;
    height: 100%;
    border-radius: 30px;
    overflow: hidden;
    background: #0a0a1a;
    position: relative;
}

.screen-ui {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 20px 16px;
}

.ui-header {
    height: 32px;
    background: rgba(102, 126, 234, 0.2);
    border-radius: 8px;
    margin-bottom: 16px;
}

.ui-viewfinder {
    flex: 1;
    border: 2px solid rgba(102, 126, 234, 0.4);
    border-radius: 16px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(102, 126, 234, 0.05);
}

.viewfinder-corners {
    position: absolute;
    inset: 10px;
}

.corner {
    position: absolute;
    width: 20px;
    height: 20px;
    border-color: #667eea;
    border-style: solid;
    border-width: 0;
}

.corner.tl { top: 0; left: 0; border-top-width: 3px; border-left-width: 3px; border-top-left-radius: 8px; }
.corner.tr { top: 0; right: 0; border-top-width: 3px; border-right-width: 3px; border-top-right-radius: 8px; }
.corner.bl { bottom: 0; left: 0; border-bottom-width: 3px; border-left-width: 3px; border-bottom-left-radius: 8px; }
.corner.br { bottom: 0; right: 0; border-bottom-width: 3px; border-right-width: 3px; border-bottom-right-radius: 8px; }

.scan-pulse {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(102, 126, 234, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%   { transform: scale(0.8); opacity: 0.5; }
    50%  { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(0.8); opacity: 0.5; }
}

.ui-controls {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 20px 30px;
}

.ui-controls span {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
}

.ui-controls .shutter {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: 3px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
}

/* 下载二维码 */
.download-qrcodes {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.qrcode-tabs {
    display: flex;
    gap: 12px;
    width: 100%;
    max-width: 300px;
}

.qrcode-tab {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    background-color: var(--background-color);
    border-radius: 30px;
    color: var(--light-text);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.qrcode-tab:hover {
    background-color: rgba(102, 126, 234, 0.08);
    border-color: rgba(102, 126, 234, 0.3);
}

.qrcode-tab.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-color: transparent;
}

.qrcode-displays {
    width: 100%;
    position: relative;
}

.qrcode-display {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.qrcode-display.active {
    display: flex;
    opacity: 1;
}

.store-button {
    display: inline-block;
    transition: var(--transition);
    padding: 6px;
    border-radius: 10px;
    background: transparent;
}

.store-button:hover {
    transform: scale(1.05);
    opacity: 0.9;
    background: rgba(0, 0, 0, 0.04);
}

.development-notice {
    text-align: center;
    color: var(--light-text);
    font-size: 16px;
    padding: 30px 20px;
    background: var(--background-color);
    border-radius: 16px;
    border: 1px dashed var(--border-color);
}

/* 分割线 */
.download-divider {
    width: 100%;
    height: 1px;
    background: var(--border-color);
    margin: 40px 0;
}

/* 会员套餐 */
.membership-title {
    text-align: center;
    margin-bottom: 36px;
    font-size: 28px;
}

.membership-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
    background-color: var(--background-color);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.membership-benefits h4 {
    font-size: 20px;
    margin-bottom: 16px;
}

.benefits-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.benefits-list li {
    color: var(--light-text);
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.benefits-list li::before {
    content: "✓";
    color: var(--accent-color);
    font-weight: bold;
    font-size: 16px;
}

.membership-options {
    display: flex;
    gap: 20px;
}

.option-card {
    flex: 1;
    padding: 28px 20px;
    border-radius: 16px;
    background-color: var(--section-bg);
    text-align: center;
    position: relative;
    transition: var(--transition);
    border: 1px solid transparent;
}

.option-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.15);
}

.option-card h4 {
    font-size: 19px;
    margin-bottom: 12px;
}

.option-card .price {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 12px 0 6px;
}

.price-note {
    color: var(--light-text);
    font-size: 14px;
    margin-bottom: 6px;
}

.price-compare {
    color: var(--accent-color);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 20px;
}

.recommended {
    border-color: var(--accent-color);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
}

.recommended-tag {
    position: absolute;
    top: -13px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
}

.recommended-btn {
    background: linear-gradient(135deg, #667eea, #764ba2) !important;
}

.subscribe-button {
    display: inline-block;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 11px 20px;
    border-radius: 980px;
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    width: 100%;
    text-align: center;
}

.subscribe-button:hover {
    transform: scale(1.04);
    opacity: 1;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

/* 支持区域 */
.support {
    background-color: var(--background-color);
    padding: 120px 20px;
}

.support-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 1100px;
    margin: 50px auto 0;
}

.support-card {
    background-color: var(--section-bg);
    border-radius: 20px;
    padding: 40px 32px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.support-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.12);
}

.support-card-icon {
    margin-bottom: 24px;
}

.support-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
}

.support-card p {
    color: var(--light-text);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 20px;
}

.support-email {
    padding: 12px 16px;
    background-color: rgba(102, 126, 234, 0.06);
    border-radius: 10px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.email-label {
    font-weight: 500;
    font-size: 14px;
}

.support-email a {
    color: var(--accent-color);
    font-weight: 500;
    font-size: 14px;
}

.support-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--accent-color);
}

/* 页脚 */
footer {
    background-color: var(--dark-bg);
    padding: 60px 20px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 36px;
    background: linear-gradient(135deg, #667eea, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    justify-content: flex-start;
    gap: 100px;
    margin: 40px 0;
}

.footer-column h5 {
    font-size: 14px;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.9);
}

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

.footer-column a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    transition: var(--transition);
}

.footer-column a:hover {
    color: rgba(255, 255, 255, 0.9);
}

.copyright {
    color: rgba(255, 255, 255, 0.35);
    font-size: 13px;
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* 动画类 */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* 媒体查询 */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        padding: 60px 40px;
        text-align: center;
    }

    .hero h1 {
        font-size: 48px;
    }

    .subtitle {
        margin: 0 auto 40px;
    }

    .hero-3d-mockup {
        width: 220px;
        height: 220px;
    }

    .tech-showcase {
        flex-direction: column;
        gap: 40px;
    }

    .tech-stats {
        flex-wrap: wrap;
        gap: 30px;
    }

    .download-content {
        flex-direction: column;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 36px; }
    h2 { font-size: 32px; }

    .hero h1 { font-size: 40px; }
    .subtitle { font-size: 17px; }

    .recognition-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .tech-content h3 { font-size: 28px; }

    .stat-number { font-size: 36px; }

    .membership-options {
        flex-direction: column;
    }

    .support-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        flex-direction: column;
        gap: 30px;
    }

    .membership-container {
        padding: 24px;
    }

    .benefits-list {
        grid-template-columns: 1fr;
    }

    nav {
        padding: 14px 20px;
    }

    .hero {
        padding: 40px 20px;
        min-height: auto;
    }
}