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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: rgba(99, 102, 241, 0.1);
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --bg-color: #f5f5f7;
    --surface-color: #ffffff;
    --header-bg: rgba(255, 255, 255, 0.7);
    --card-bg: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --logo-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
    --logo-shadow-hover: 0 6px 20px rgba(99, 102, 241, 0.35);
    --border-color: rgba(0, 0, 0, 0.05);
    --divider-gradient-start: #6366f1;
    --divider-gradient-end: #8b5cf6;
    --wechat-color: #07c160;
    --wechat-hover: #06ad56;
}

[data-theme="dark"] {
    --primary-color: #818cf8;
    --primary-hover: #6366f1;
    --primary-light: rgba(129, 140, 248, 0.15);
    --text-primary: #f1f1f3;
    --text-secondary: #a0a0a8;
    --text-tertiary: #606068;
    --bg-color: #0a0a0f;
    --surface-color: #1a1a1f;
    --header-bg: rgba(26, 26, 31, 0.7);
    --card-bg: #1a1a1f;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --logo-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    --logo-shadow-hover: 0 6px 20px rgba(99, 102, 241, 0.5);
    --border-color: rgba(255, 255, 255, 0.05);
    --divider-gradient-start: #818cf8;
    --divider-gradient-end: #a78bfa;
}

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

body {
    font-family: "HarmonyOS Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header-content {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--logo-shadow);
    transition: all 0.3s ease;
}

.logo-icon:hover {
    box-shadow: var(--logo-shadow-hover);
    transform: translateY(-2px);
}

.logo-icon.small {
    width: 28px;
    height: 28px;
    border-radius: 8px;
}

.logo-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    transition: color 0.3s ease;
}

/* ========== 头部右侧按钮组 ========== */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--surface-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text-secondary);
    position: relative;
    flex-shrink: 0;
}

.theme-toggle:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.theme-toggle svg {
    width: 22px;
    height: 22px;
    position: absolute;
    transition: all 0.3s ease;
}

.sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.moon-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding-top: 64px;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 40px;
}

.hero-section {
    padding: 80px 0;
    min-height: calc(100vh - 64px);
    display: flex;
    align-items: center;
}

.content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    width: 100%;
}

.text-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.brand-name {
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1.1;
    transition: color 0.3s ease;
}

.divider {
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, var(--divider-gradient-start), var(--divider-gradient-end));
    border-radius: 2px;
    transition: background 0.3s ease;
}

.tagline {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    transition: color 0.3s ease;
}

.description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 480px;
    transition: color 0.3s ease;
}

.action-group {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 16px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: var(--text-primary);
    color: var(--bg-color);
    border: none;
    border-radius: 12px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
    text-decoration: none;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon svg {
    width: 100%;
    height: 100%;
}

.wechat-wrapper {
    position: relative;
}

.wechat-btn {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    border: none;
    background: var(--wechat-color);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(7, 193, 96, 0.3);
}

.wechat-btn:hover {
    background: var(--wechat-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(7, 193, 96, 0.4);
}

.wechat-btn svg {
    width: 28px;
    height: 28px;
}

.wechat-btn.active {
    background: var(--wechat-hover);
}

.qrcode-popup {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) scale(0.9);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    z-index: 100;
}

.qrcode-popup.show {
    opacity: 1;
    transform: translateX(-50%) scale(1);
    pointer-events: auto;
    z-index: 100;
}

.qrcode-content {
    background: var(--surface-color);
    padding: 20px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    min-width: 180px;
    transition: background-color 0.3s ease;
    position: relative;
}

.qrcode-content::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--surface-color);
    transition: border-bottom-color 0.3s ease;
}

.qrcode-placeholder {
    width: 150px;
    height: 150px;
    margin: 0 auto 12px;
}

.qrcode-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qrcode-tip {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.phone-section {
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.phone-mockup {
    z-index: 90;
    max-width: 100%;
    height: auto;
    border-radius: 40px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.4s ease, box-shadow 0.3s ease, opacity 0.3s ease;
}

.phone-mockup:hover {
    transform: scale(1.02) rotateY(-5deg);
}

.theme-img {
    transition: opacity 0.3s ease;
}

.showcase-section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: -0.02em;
    opacity: 0;
    transform: translateY(30px);
    transition: color 0.3s ease;
}

.section-title.visible {
    animation: fadeInUp 0.8s ease forwards;
}

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

.showcase-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    opacity: 0;
    transform: translateY(30px);
}

.showcase-item.visible {
    animation: fadeInUp 0.8s ease forwards;
}

.showcase-image {
    position: relative;
}

.showcase-image img {
    width: 200px;
    height: auto;
    border-radius: 24px;
}

.showcase-info {
    text-align: center;
}

.showcase-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    transition: color 0.3s ease;
}

.showcase-info p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

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

.footer-logo-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.copyright {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 1024px) {
    .showcase-grid {
        gap: 30px;
    }

    .showcase-image img {
        width: 180px;
    }
}

@media (max-width: 968px) {
    .content {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }

    .text-section {
        align-items: center;
        z-index: 10;
        position: relative;
    }

    .description {
        max-width: 100%;
    }

    .divider {
        margin: 0 auto;
    }

    .brand-name {
        font-size: 3rem;
    }

    .tagline {
        font-size: 1.5rem;
    }

    .phone-mockup {
        width: 260px;
    }

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

    .showcase-image img {
        width: 160px;
        border-radius: 20px;
    }

    .showcase-info h3 {
        font-size: 1.125rem;
    }

    .showcase-info p {
        font-size: 0.875rem;
    }
}

@media (max-width: 640px) {
    .header-content {
        padding: 0 20px;
    }

    .container {
        padding: 0 20px;
    }

    .hero-section {
        padding: 60px 0;
    }

    .brand-name {
        font-size: 2.5rem;
    }

    .tagline {
        font-size: 1.25rem;
    }

    .description {
        font-size: 1rem;
    }

    .action-group {
        gap: 12px;
    }

    .download-btn {
        padding: 14px 28px;
        font-size: 0.9375rem;
    }

    .wechat-btn {
        width: 48px;
        height: 48px;
    }

    .wechat-btn svg {
        width: 24px;
        height: 24px;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 40px;
    }

    .showcase-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .showcase-image img {
        width: 220px;
        border-radius: 28px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        padding: 0 20px;
    }

    .footer-links {
        gap: 20px;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
        border-radius: 10px;
    }
}

@media (max-width: 380px) {
    .brand-name {
        font-size: 2rem;
    }

    .phone-mockup {
        width: 200px;
    }

    .showcase-image img {
        width: 200px;
    }
}

/* ========== 导航链接 ========== */
.nav-links {
    display: flex;
    gap: 24px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s ease;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--primary-color);
}

/* ========== 汉堡菜单 ========== */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background: var(--surface-color);
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    z-index: 999;
}

.mobile-menu a {
    display: block;
    padding: 14px 40px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: background 0.2 ease;
}

.mobile-menu a:hover {
    background: var(--bg-color);
}

/* ========== 更新日志 ========== */
.changelog-section {
    padding: 100px 0;
}

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

.changelog-item {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow);
    transition: box-shadow 0.3 ease;
}

.changelog-item:hover {
    box-shadow: var(--shadow-hover);
}

.changelog-version {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.changelog-entries {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.changelog-entries li {
    position: relative;
    padding-left: 20px;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

.changelog-entries li::before {
    content: "•";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.25rem;
    line-height: 1.6;
}

/* ========== 用户数据按钮 ========== */
.user-data-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--primary-light);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: 12px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all 0.3s ease;
    flex-shrink: 0;
    white-space: nowrap;
}

.user-data-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.user-data-btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* ========== 响应式 ========== */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }
}

@media (max-width: 640px) {
    .header-content {
        padding: 0 16px;
    }

    .header-actions {
        gap: 8px;
    }

    .user-data-btn {
        padding: 8px 12px;
        font-size: 0.875rem;
        gap: 6px;
    }

    .user-data-text {
        display: none;
    }

    .user-data-btn svg {
        width: 20px;
        height: 20px;
    }

    .theme-toggle {
        width: 40px;
        height: 40px;
    }

    .logo-text {
        font-size: 1.1rem;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
    }
}

@media (max-width: 380px) {
    .header-actions {
        gap: 6px;
    }

    .user-data-btn {
        padding: 6px;
        border-radius: 10px;
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
    }

    .theme-toggle svg {
        width: 18px;
        height: 18px;
    }
}

/* 底部容器样式 */
.footer-info {
    text-align: center;
    font-size: 14px;
    color: #999;
    line-height: 1.6;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* 版权信息样式 */
.copyright {
    margin: 0 0 5px 0;
}

/* 备案号样式 */
.beian {
    margin: 0;
}

/* 备案链接样式 */
.beian a {
    text-decoration: none;
    color: #999;
    transition: color 0.3s ease;
}

/* 鼠标悬停时的效果 */
.beian a:hover {
    color: #555;
    text-decoration: underline;
}