/* ========================================
   meimodu 魅魔都 - 样式表
   配色：深紫色系，符合 logo 风格
   ======================================== */

/* CSS Reset & 基础 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --purple-900: #1a0b2e;
    --purple-800: #2d1b4e;
    --purple-700: #3f2566;
    --purple-600: #5b2d91;
    --purple-500: #7c3aed;
    --purple-400: #9d5cff;
    --purple-300: #b98bff;
    --purple-200: #d4b5ff;
    --purple-100: #ede5ff;
    --pink-500: #e879f9;
    --pink-400: #f0abfc;
    --white: #ffffff;
    --gray-100: #f5f0ff;
    --gray-200: #e8e0f5;
    --gray-300: #c9bde0;
    --gray-400: #9b8cb8;
    --gray-500: #6b5d87;
    --gray-600: #4a3d66;
    --gray-700: #322848;
    --gray-800: #1f1633;
    --gray-900: #120a1f;
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #e879f9 100%);
    --gradient-hero: linear-gradient(160deg, #1a0b2e 0%, #3f2566 40%, #5b2d91 70%, #7c3aed 100%);
    --gradient-card: linear-gradient(145deg, rgba(124, 58, 237, 0.08) 0%, rgba(232, 121, 249, 0.04) 100%);
    --shadow-sm: 0 2px 8px rgba(76, 29, 149, 0.12);
    --shadow-md: 0 4px 16px rgba(76, 29, 149, 0.16);
    --shadow-lg: 0 8px 32px rgba(76, 29, 149, 0.2);
    --shadow-xl: 0 16px 48px rgba(76, 29, 149, 0.28);
    --shadow-glow: 0 0 48px rgba(124, 58, 237, 0.4);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--gray-800);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

/* ============ 按钮样式 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(124, 58, 237, 0.45);
}

.btn-primary:hover svg {
    transform: translateY(2px);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1.5px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-large {
    padding: 16px 36px;
    font-size: 16px;
    border-radius: var(--radius-lg);
}

/* ============ 导航栏 ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 11, 46, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: all var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--white);
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.5), rgba(232, 121, 249, 0.3));
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 18px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-link:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
}

.nav-link.nav-cta {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 10px 24px;
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.4);
}

.nav-link.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(124, 58, 237, 0.5);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ============ Hero 首屏 ============ */
.hero {
    position: relative;
    min-height: 100vh;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: 68px;
}

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

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.orb-1 {
    width: 420px;
    height: 420px;
    background: var(--purple-500);
    top: -120px;
    right: -80px;
    animation: float1 18s ease-in-out infinite;
}

.orb-2 {
    width: 340px;
    height: 340px;
    background: var(--pink-500);
    bottom: -100px;
    left: -60px;
    animation: float2 22s ease-in-out infinite;
}

.orb-3 {
    width: 280px;
    height: 280px;
    background: var(--purple-400);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: float3 15s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-60px, 40px); }
}

@keyframes float2 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(50px, -50px); }
}

@keyframes float3 {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-30%, -60%) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px 80px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    min-height: calc(100vh - 68px);
}

.hero-text {
    color: var(--white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    font-size: 14px;
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.8s ease-out;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--pink-400);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.hero-desc {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 520px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

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

.hero-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 36px;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meta-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.55);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.meta-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
}

.meta-divider {
    width: 1px;
    height: 32px;
    background: rgba(255, 255, 255, 0.2);
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-stats {
    display: flex;
    gap: 48px;
    animation: fadeInUp 0.8s ease-out 0.5s both;
}

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

.stat-num {
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 2px;
}

/* ============ 截图叠加重叠 ============ */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1200px;
}

.screen-stack {
    position: relative;
    width: 360px;
    height: 540px;
}

.screen {
    position: absolute;
    width: 280px;
    height: 480px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-slow);
    cursor: pointer;
    border: 3px solid rgba(255, 255, 255, 0.15);
    background: var(--gray-900);
}

.screen-img {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, var(--purple-700), var(--purple-900));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.screen-img::before {

    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    border-radius: var(--radius-lg);
    background: linear-gradient(160deg, rgba(124, 58, 237, 0.4), rgba(232, 121, 249, 0.2));
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.screen-img::after {

    position: absolute;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--pink-400), var(--purple-400));
    top: 28px;
    right: 28px;
    box-shadow: 0 4px 16px rgba(232, 121, 249, 0.4);
}

.screen-img-1::before {
    background: linear-gradient(160deg, rgba(232, 121, 249, 0.35), rgba(124, 58, 237, 0.25));
}

.screen-img-2::before {
    background: linear-gradient(160deg, rgba(124, 58, 237, 0.4), rgba(157, 92, 255, 0.2));
}

.screen-img-3::before {
    background: linear-gradient(160deg, rgba(157, 92, 255, 0.35), rgba(232, 121, 249, 0.2));
}

.screen-label {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: rgba(0, 0, 0, 0.5);
    color: var(--white);
    font-size: 13px;
    font-weight: 500;
    border-radius: 100px;
    backdrop-filter: blur(10px);
    white-space: nowrap;
}

.screen-1 {
    top: 20px;
    left: 0;
    z-index: 3;
    animation: screenFloat1 6s ease-in-out infinite;
}

.screen-2 {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1.05);
    z-index: 2;
    animation: screenFloat2 7s ease-in-out infinite;
}

.screen-3 {
    bottom: 20px;
    right: 0;
    z-index: 1;
    animation: screenFloat3 8s ease-in-out infinite;
}

@keyframes screenFloat1 {
    0%, 100% { transform: translateY(0) rotate(-6deg); }
    50% { transform: translateY(-12px) rotate(-6deg); }
}

@keyframes screenFloat2 {
    0%, 100% { transform: translate(-50%, -50%) scale(1.05) rotate(0deg); }
    50% { transform: translate(-50%, calc(-50% - 10px)) scale(1.05) rotate(0deg); }
}

@keyframes screenFloat3 {
    0%, 100% { transform: translateY(0) rotate(6deg); }
    50% { transform: translateY(-12px) rotate(6deg); }
}

.screen:hover {
    z-index: 10;
    box-shadow: var(--shadow-glow);
}

.screen-1:hover { transform: translateY(-8px) rotate(-4deg) scale(1.08); }
.screen-2:hover { transform: translate(-50%, -55%) scale(1.1); }
.screen-3:hover { transform: translateY(-8px) rotate(4deg) scale(1.08); }

/* ============ 通用 Section ============ */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--purple-100);
    color: var(--purple-600);
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-title {
    font-size: clamp(28px, 3.5vw, 40px);
    font-weight: 800;
    color: var(--gray-800);
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 17px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ============ 功能特色 ============ */
.features {
    padding: 100px 0;
    background: var(--gray-100);
}

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

.feature-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(124, 58, 237, 0.08);
}

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

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(124, 58, 237, 0.2);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: all var(--transition);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.icon-1 { background: linear-gradient(135deg, #ede5ff, #d4b5ff); color: var(--purple-600); }
.icon-2 { background: linear-gradient(135deg, #fce7f3, #f5d0fe); color: var(--pink-500); }
.icon-3 { background: linear-gradient(135deg, #ede5ff, #c9bde0); color: var(--purple-500); }
.icon-4 { background: linear-gradient(135deg, #fce7f3, #e879f9); color: var(--purple-600); }
.icon-5 { background: linear-gradient(135deg, #ede5ff, #b98bff); color: var(--purple-600); }
.icon-6 { background: linear-gradient(135deg, #fce7f3, #f0abfc); color: var(--pink-500); }

.feature-card:hover .feature-icon {
    transform: scale(1.08) rotate(-5deg);
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 10px;
}

.feature-desc {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ============ 用户评价 ============ */
.reviews {
    padding: 100px 0;
    background: var(--white);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.review-card {
    background: var(--gradient-card);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid rgba(124, 58, 237, 0.1);
    transition: all var(--transition);
}

.review-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.25);
}

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

.review-text {
    font-size: 16px;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

.reviewer {
    display: flex;
    align-items: center;
    gap: 14px;
}

.reviewer-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 16px;
}

.avatar-1 { background: linear-gradient(135deg, var(--purple-500), var(--pink-500)); }
.avatar-2 { background: linear-gradient(135deg, var(--pink-500), var(--purple-400)); }
.avatar-3 { background: linear-gradient(135deg, var(--purple-400), var(--purple-600)); }
.avatar-4 { background: linear-gradient(135deg, var(--purple-600), var(--pink-400)); }

.reviewer-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-800);
}

.reviewer-role {
    font-size: 13px;
    color: var(--gray-400);
}

/* ============ FAQ ============ */
.faq {
    padding: 100px 0;
    background: var(--gray-100);
}

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

.faq-item {
    border-bottom: 1px solid rgba(124, 58, 237, 0.12);
}

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

.faq-question {
    width: 100%;
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    font-size: 17px;
    font-weight: 600;
    color: var(--gray-800);
    text-align: left;
    transition: color var(--transition);
}

.faq-question:hover {
    color: var(--purple-600);
}

.faq-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--purple-100);
    color: var(--purple-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 400;
    transition: all var(--transition);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    background: var(--gradient-primary);
    color: var(--white);
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, padding 0.4s ease-out;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 24px;
}

.faq-answer p {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.8;
}

.faq-answer code {
    background: var(--purple-100);
    color: var(--purple-600);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
}

/* ============ 下载区域 ============ */
.download {
    padding: 100px 0;
    background: var(--white);
}

.download-card {
    position: relative;
    background: var(--gradient-hero);
    border-radius: var(--radius-xl);
    padding: 80px 40px;
    text-align: center;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.download-bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: var(--purple-500);
    top: -100px;
    left: -80px;
    opacity: 0.5;
}

.shape-2 {
    width: 240px;
    height: 240px;
    background: var(--pink-500);
    bottom: -80px;
    right: -60px;
    opacity: 0.4;
}

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

.download-logo {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.download-logo-img {
    width: 48px;
    height: 48px;
    border-radius: 12px;
}

.download-title {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
}

.download-desc {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

.download-meta {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 36px;
}

.meta-chip {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 10px 24px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.chip-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.chip-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 48px;
    font-size: 18px;
    font-weight: 700;
    background: var(--white);
    color: var(--purple-600);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transition: all var(--transition);
    margin-bottom: 16px;
}

.btn-download svg {
    width: 22px;
    height: 22px;
}

.btn-download:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 40px rgba(255, 255, 255, 0.3);
}

.btn-download:hover svg {
    transform: translateY(2px);
}

.download-tip {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

/* ============ 页脚 ============ */
.footer {
    background: var(--gray-900);
    padding: 64px 0 32px;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-logo {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--purple-500), var(--pink-500));
}

.footer-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--white);
}

.footer-slogan {
    font-size: 15px;
    color: var(--gray-400);
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 28px;
    margin-bottom: 32px;
}

.footer-links a {
    font-size: 14px;
    color: var(--gray-400);
    transition: color var(--transition);
}

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

.footer-copy {
    font-size: 13px;
    color: var(--gray-600);
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
        padding: 40px 24px 60px;
    }

    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-text {
        order: 2;
    }

    .hero-visual {
        order: 1;
    }

    .hero-meta,
    .hero-actions,
    .hero-stats {
        justify-content: center;
    }

    .hero-actions {
        flex-wrap: wrap;
    }

    .hero-stats {
        gap: 32px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .screen-stack {
        width: 320px;
        height: 480px;
    }

    .screen {
        width: 240px;
        height: 420px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        background: rgba(26, 11, 46, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 8px;
        transform: translateY(-120%);
        transition: transform var(--transition);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 14px 18px;
    }

    .nav-toggle {
        display: flex;
    }

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

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

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

    .hero {
        padding-top: 68px;
    }

    .hero-content {
        padding: 32px 20px 48px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-desc {
        font-size: 15px;
    }

    .hero-meta {
        gap: 16px;
        flex-wrap: wrap;
    }

    .meta-divider {
        display: none;
    }

    .hero-stats {
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .stat-num {
        font-size: 22px;
    }

    .screen-stack {
        width: 280px;
        height: 420px;
    }

    .screen {
        width: 210px;
        height: 360px;
    }

    .features,
    .reviews,
    .faq,
    .download {
        padding: 64px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

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

    .reviews-grid {
        grid-template-columns: 1fr;
    }

    .download-card {
        padding: 48px 24px;
    }

    .download-meta {
        flex-direction: column;
        gap: 12px;
    }

    .btn-download {
        padding: 16px 36px;
        font-size: 16px;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 16px 24px;
    }

    .hero-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .screen-stack {
        width: 240px;
        height: 360px;
    }

    .screen {
        width: 180px;
        height: 320px;
    }

    .feature-card {
        padding: 28px 22px;
    }

    .review-card {
        padding: 24px;
    }

    .faq-question {
        font-size: 15px;
        padding: 20px 0;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .btn-large {
        padding: 14px 28px;
        font-size: 15px;
    }
}

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

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

.feature-card,
.review-card {
    transition: opacity 0.8s ease-out, transform 0.8s ease-out, box-shadow 0.3s, border-color 0.3s;
}