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

:root {
    --primary-color: #2a6cfd;
    --primary-dark: #234fcc;
    --accent-color: #8c52ff;
    --text-color: #1f1f1f;
    --text-secondary: #5a5f6c;
    --bg-color: #fff;
    --bg-light: #f4f6fb;
    --border-color: #e5e8ef;
    --link-color: var(--primary-color);
    --link-hover: var(--primary-dark);
    --shadow-soft: 0 12px 40px rgba(20, 52, 120, 0.12);
}

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

body.menu-open {
    overflow: hidden;
}

.wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 导航栏 */
.navbar {
    background-color: var(--bg-color);
    border-bottom: 1px solid rgba(229, 232, 239, 0.8);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 6px 18px rgba(27, 62, 160, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: nowrap;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 600;
    color: var(--text-color);
    text-decoration: none;
}

.logo-img {
    height: 36px;
    width: auto;
    display: block;
    max-width: 120px;
}

.logo-text {
    font-size: 24px;
    font-weight: 600;
    display: inline-block;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 28px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    border-radius: 2px;
    transition: all 0.3s;
}

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

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

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

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 25px;
    margin: 0 0 0 auto;
    padding: 0;
}

.nav-menu li a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 15px;
    transition: color 0.3s;
    padding: 5px 0;
}

.nav-menu li a:hover {
    color: var(--link-color);
}

.nav-menu .divider {
    color: var(--border-color);
    margin: 0 5px;
}

.btn-start {
    background-color: var(--link-color);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 4px;
    transition: background-color 0.3s;
    font-size: 14px;
}

.btn-start:hover {
    background-color: var(--link-hover);
}

/* Hero区域 */
.hero {
    position: relative;
    padding: 120px 20px 80px;
    background: radial-gradient(120% 120% at 0% 0%, #eef3ff 0%, #f8f7ff 55%, #f2f4ff 100%);
    overflow: hidden;
}

.hero:before,
.hero:after {
    content: "";
    position: absolute;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    filter: blur(70px);
    z-index: 0;
}

.hero:before {
    top: 30px;
    right: -80px;
    background: rgba(42, 108, 253, 0.18);
}

.hero:after {
    bottom: -60px;
    left: 40px;
    background: rgba(140, 82, 255, 0.18);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    align-items: center;
    gap: 50px;
}

.hero-text {
    max-width: 580px;
}

.badge {
    display: inline-block;
    background: rgba(42, 108, 253, 0.1);
    color: var(--primary-dark);
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.25;
    margin: 18px 0;
    color: #101320;
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.85;
    margin-bottom: 30px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #fff;
    padding: 14px 32px;
    border-radius: 10px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    box-shadow: var(--shadow-soft);
    transition: transform 0.25s ease, box-shadow 0.25s ease, background-position 0.3s;
    background-size: 140% 140%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(42, 108, 253, 0.25);
}

.download-highlight {
    background: linear-gradient(135deg, #3f7bff, #7b5bff) !important;
    border: 2px solid #5e8cff !important;
    box-shadow: 0 14px 34px rgba(63, 123, 255, 0.28);
    color: #fff !important;
}

.download-highlight:hover {
    box-shadow: 0 16px 40px rgba(63, 123, 255, 0.36);
    transform: translateY(-2px);
}

.btn-outline {
    display: inline-block;
    padding: 12px 26px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    transition: background 0.2s, border-color 0.2s, transform 0.25s;
}

.btn-outline:hover {
    background: #f3f5ff;
    border-color: rgba(42, 108, 253, 0.3);
    transform: translateY(-2px);
}

.hero-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.hero-tags span {
    background: #fff;
    border: 1px solid rgba(42, 108, 253, 0.12);
    color: var(--primary-dark);
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 13px;
    box-shadow: 0 6px 18px rgba(42, 108, 253, 0.08);
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-phones {
    background: linear-gradient(135deg, rgba(42, 108, 253, 0.08), rgba(140, 82, 255, 0.08));
    border: 1px solid rgba(42, 108, 253, 0.12);
    box-shadow: 0 20px 60px rgba(17, 38, 96, 0.14);
    border-radius: 26px;
    padding: 22px;
    width: 100%;
    max-width: 420px;
}

.hero-phones img {
    width: 100%;
    display: block;
}

.floating-card {
    position: absolute;
    display: flex;
    gap: 12px;
    padding: 14px 16px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 18px 42px rgba(18, 42, 90, 0.16);
    border: 1px solid rgba(42, 108, 253, 0.12);
    min-width: 210px;
    align-items: center;
}

.floating-card--top {
    top: 10%;
    right: -8%;
}

.floating-card--bottom {
    bottom: 8%;
    left: -6%;
}

.floating-icon {
    width: 34px;
    height: 34px;
}

.floating-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-color);
}

.floating-sub {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 通用区块样式 */
section {
    padding: 80px 20px;
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 15px;
    color: var(--text-color);
}

.section-subtitle {
    font-size: 22px;
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 50px;
    font-weight: 400;
}

.section-description {
    font-size: 18px;
    text-align: center;
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

/* 独有特性 */
.features {
    background-color: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background-color: var(--bg-color);
    padding: 32px 30px;
    border-radius: 16px;
    box-shadow: 0 14px 36px rgba(17, 38, 96, 0.1);
    border: 1px solid rgba(42, 108, 253, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 48px rgba(17, 38, 96, 0.14);
}

.feature-icon {
    width: 52px;
    height: 52px;
    margin-bottom: 16px;
}

.feature-card h4 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 16px;
}

/* 功能支持 */
.functions {
    background-color: var(--bg-color);
}

.functions-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    align-items: center;
    margin-bottom: 40px;
}

.functions-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.functions-list li {
    padding: 14px 0 14px 42px;
    position: relative;
    color: var(--text-secondary);
    font-size: 17px;
    line-height: 1.7;
}

.functions-list li:before {
    content: "";
    position: absolute;
    left: 0;
    top: 16px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(42, 108, 253, 0.14), rgba(140, 82, 255, 0.14));
    border: 1px solid rgba(42, 108, 253, 0.28);
    box-shadow: 0 8px 20px rgba(42, 108, 253, 0.14);
}

.functions-visual {
    background: linear-gradient(135deg, rgba(42, 108, 253, 0.08), rgba(140, 82, 255, 0.08));
    border: 1px solid rgba(42, 108, 253, 0.12);
    border-radius: 20px;
    padding: 16px;
    box-shadow: 0 22px 50px rgba(17, 38, 96, 0.14);
}

.functions-visual img {
    width: 100%;
    display: block;
    border-radius: 14px;
}

.btn-wrapper {
    text-align: center;
    margin-bottom: 60px;
}

.functions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.function-card {
    background-color: var(--bg-color);
    padding: 35px 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: border-color 0.3s, transform 0.3s;
}

.function-card:hover {
    border-color: var(--link-color);
    transform: translateY(-3px);
}

.function-card h4 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-color);
}

.function-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 16px;
}

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

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.review-card {
    background-color: var(--bg-color);
    padding: 35px 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border-left: 4px solid var(--link-color);
}

.review-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 16px;
    font-style: italic;
}

/* 下载区域 */
.download {
    background: linear-gradient(135deg, #6b83e0 0%, #8a63d9 100%);
    color: #fff;
    padding: 90px 20px;
    position: relative;
    overflow: hidden;
}

.download .section-title,
.download .section-description {
    color: #fff;
}

.download-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    color: #fff;
    font-weight: 600;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.download-brand img {
    width: 28px;
    height: 28px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    margin-top: 24px;
}

.download-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: #fdfdfd;
    color: var(--text-color);
    border-radius: 12px;
    padding: 14px;
    text-decoration: none;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.16);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.download-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
}

.download-card--ios {
    background: linear-gradient(135deg, #f9fbff 0%, #eef4ff 100%);
}

.download-card--android {
    background: linear-gradient(135deg, #f8fff9 0%, #e8f7ef 100%);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.brand-mark {
    width: 36px;
    height: 36px;
}

.platform-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 14px;
    background: rgba(42, 108, 253, 0.08);
    border: 1px solid rgba(42, 108, 253, 0.18);
    min-width: 150px;
}

.download-card--android .platform-badge {
    background: rgba(61, 220, 132, 0.1);
    border-color: rgba(61, 220, 132, 0.2);
}

.platform-logo {
    width: 28px;
    height: 28px;
}

.platform-name {
    font-size: 16px;
    font-weight: 800;
    color: var(--text-color);
    line-height: 1.2;
}

.platform-sub {
    font-size: 13px;
    color: var(--text-secondary);
}

.download-hot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 64px;
    padding: 8px 12px;
    border-radius: 12px;
    background: rgba(42, 108, 253, 0.12);
    color: var(--primary-dark);
    font-weight: 700;
    font-size: 13px;
}

.download-hot--green {
    background: rgba(61, 220, 132, 0.16);
    color: #1d9b59;
}

.card-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    align-items: center;
}

.card-copy {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

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

.brand-text {
    font-weight: 800;
    color: var(--text-color);
    font-size: 16px;
}

.card-meta {
    margin: 0;
    padding: 0 0 0 16px;
    display: grid;
    gap: 6px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.card-meta li {
    list-style: disc;
    font-size: 14px;
}

.card-device {
    width: 120px;
    max-height: 160px;
    height: auto;
    object-fit: contain;
    margin: 6px auto;
}

.card-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 18px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #fff;
    border: 2px solid transparent;
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(42, 108, 253, 0.25);
    text-decoration: none;
    width: fit-content;
    transition: all 0.2s ease;
    align-self: center;
    min-width: 140px;
}

.card-cta:after {
    content: "›";
    font-size: 16px;
}

.download-card:hover .card-cta {
    transform: translateY(-2px);
    box-shadow: 0 14px 34px rgba(42, 108, 253, 0.38);
}

/* 页脚 */
.footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 50px 20px;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    margin-bottom: 25px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #a0a0a0;
}

.footer-links span {
    color: #666;
    margin: 0 5px;
}

.footer-copyright {
    color: #999;
    font-size: 13px;
    line-height: 1.8;
}

/* 响应式设计 - 平板 */
@media (max-width: 1024px) {
    .features-grid,
    .functions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 响应式设计 - 移动端 */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-color);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px 30px 30px;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        z-index: 999;
        gap: 0;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu li a {
        padding: 15px 0;
        display: block;
        width: 100%;
    }
    
    .nav-menu .divider {
        display: none;
    }
    
    .btn-start {
        width: 100%;
        text-align: center;
        margin-top: 10px;
    }
    
    .hero {
        padding: 80px 20px 40px;
    }
    
    .hero-layout {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .hero-text {
        text-align: center;
        margin: 0 auto;
    }
    
    .hero-actions,
    .hero-tags {
        justify-content: center;
    }
    
    .hero-visual {
        max-width: 320px;
        margin: 0 auto;
    }
    
    .floating-card {
        position: relative;
        inset: auto;
        margin: 10px 0 0;
    }
    
    .floating-card--top,
    .floating-card--bottom {
        right: auto;
        left: auto;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    section {
        padding: 60px 20px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 18px;
    }
    
    .features-grid,
    .functions-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .download {
        padding: 80px 20px;
    }
    
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    .card-main {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .card-copy {
        align-items: center;
    }
    
    .card-device {
        margin: 4px auto;
    }
    
    .card-cta {
        width: 100%;
        justify-content: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 8px;
    }
    
    .footer-links span {
        display: none;
    }
}

/* 响应式设计 - 小屏手机 */
@media (max-width: 480px) {
    .nav-container {
        padding: 12px 15px;
    }
    
    .logo-img {
        height: 28px;
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .hero {
        padding: 50px 15px;
    }
    
    .hero-title {
        font-size: 26px;
    }
    
    .hero-description {
        font-size: 15px;
    }
    
    section {
        padding: 50px 15px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .section-subtitle {
        font-size: 16px;
        margin-bottom: 35px;
    }
    
    .feature-card,
    .function-card,
    .review-card {
        padding: 28px 22px;
    }
    
    .download {
        padding: 50px 15px;
    }
    
    .download-btn {
        padding: 20px 25px;
    }
    
    .download-icon {
        width: 40px;
        height: 40px;
    }
    
    .footer {
        padding: 40px 15px;
    }
}