/* ==========================================
   现代精致设计系统
   ========================================== */

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

:root {
    /* 精致色彩系统 */
    --primary-50: #f5f7ff;
    --primary-100: #ebf0ff;
    --primary-200: #d6e0ff;
    --primary-500: #667eea;
    --primary-600: #5a67d8;
    --primary-700: #4c51bf;

    --purple-500: #764ba2;
    --purple-600: #6b3f94;

    /* 中性色 - 更细腻的层次 */
    --gray-50: #fafafa;
    --gray-100: #f4f5f7;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* 语义化颜色 */
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-tertiary: var(--gray-500);
    --text-inverse: #ffffff;

    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);

    /* 精致渐变 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-soft: linear-gradient(
        135deg,
        rgba(102, 126, 234, 0.1) 0%,
        rgba(118, 75, 162, 0.1) 100%
    );
    --gradient-glow: radial-gradient(
        circle at center,
        rgba(102, 126, 234, 0.15),
        transparent 70%
    );

    /* 间距系统 - 8px 基准 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 3rem;
    --space-10: 4rem;
    --space-12: 6rem;
    --space-16: 8rem;

    /* 圆角系统 */
    --radius-xs: 0.25rem;
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;

    /* 精致阴影 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.12);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);

    /* 字体系统 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
        "Helvetica Neue", Arial, sans-serif;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
}

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

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
}

/* ==========================================
   背景装饰
   ========================================== */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.blob-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.15), transparent);
    top: -200px;
    right: -200px;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(118, 75, 162, 0.12), transparent);
    bottom: -150px;
    left: -150px;
    animation-delay: -10s;
}

.blob-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(240, 147, 251, 0.1), transparent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -5s;
}

@keyframes float {
    0%,
    100% {
        transform: translate(0, 0);
    }
    33% {
        transform: translate(50px, -50px);
    }
    66% {
        transform: translate(-50px, 50px);
    }
}

/* ==========================================
   导航栏 - 精致版
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    background: rgba(26, 26, 46, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
    color: white;
    transition: transform 0.2s;
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon-wrapper {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(102, 126, 234, 0.2);
    border-radius: var(--radius-lg);
}

.logo-icon {
    width: 24px;
    height: 24px;
}

.logo-text {
    color: white;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    list-style: none;
}

.nav-links a {
    position: relative;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.2s;
    padding: var(--space-2) 0;
}

.nav-links a:hover {
    color: white;
}

.nav-links a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-full);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: var(--space-2) var(--space-5) !important;
    background: var(--gradient-primary);
    color: white !important;
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-semibold);
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ==========================================
   主视觉区 - 精致细腻版
   ========================================== */
.hero {
    position: relative;
    padding-top: calc(72px + var(--space-12));
    padding-bottom: var(--space-16);
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -20%;
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.15), transparent);
    border-radius: 50%;
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(118, 75, 162, 0.12), transparent);
    border-radius: 50%;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 600px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(102, 126, 234, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-6);
}

.tag-icon {
    font-size: 1.125rem;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: white;
    margin-bottom: var(--space-5);
}

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

.hero-subtitle {
    font-size: var(--font-size-xl);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-8);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
    padding: var(--space-6);
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
}

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: white;
    line-height: 1.2;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    margin-top: var(--space-1);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

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

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

.btn-ghost:hover {
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
}

.btn-arrow {
    transition: transform 0.2s;
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

.hero-trust {
    display: flex;
    gap: var(--space-5);
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.trust-badge svg {
    flex-shrink: 0;
}

/* ==========================================
   手机模型 - 超精致版
   ========================================== */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-container {
    position: relative;
    animation: phoneFloat 4s ease-in-out infinite;
}

@keyframes phoneFloat {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.phone-glow {
    position: absolute;
    inset: -40px;
    background: var(--gradient-glow);
    filter: blur(60px);
    opacity: 0.8;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%,
    100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

.phone-mockup {
    position: relative;
    width: 340px;
    height: 680px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 48px;
    padding: 12px;
    box-shadow: 0 50px 100px -20px rgba(102, 126, 234, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

.phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 28px;
    background: #000;
    border-radius: 0 0 20px 20px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #f8f9fa;
    border-radius: 40px;
    overflow: hidden;
    position: relative;
}

.app-interface {
    width: 100%;
    height: 100%;
    position: relative;
}

.map-view {
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 340 680"><defs><linearGradient id="skyGrad" x1="0%" y1="0%" x2="0%" y2="100%"><stop offset="0%" style="stop-color:%23e3f2fd;stop-opacity:1" /><stop offset="100%" style="stop-color:%23f5f7fa;stop-opacity:1" /></linearGradient><pattern id="gridPattern" x="0" y="0" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="%23e0e0e0" stroke-width="0.5"/></pattern></defs><rect width="340" height="680" fill="url(%23skyGrad)"/><rect width="340" height="680" fill="url(%23gridPattern)" opacity="0.3"/><g opacity="0.15"><path d="M50,200 Q100,180 150,200 T250,200" stroke="%239e9e9e" stroke-width="2" fill="none"/><path d="M80,350 Q130,330 180,350 T280,350" stroke="%239e9e9e" stroke-width="2" fill="none"/><circle cx="100" cy="220" r="3" fill="%239e9e9e"/><circle cx="200" cy="220" r="3" fill="%239e9e9e"/><circle cx="150" cy="370" r="3" fill="%239e9e9e"/><circle cx="250" cy="370" r="3" fill="%239e9e9e"/></g><g opacity="0.2"><rect x="40" y="150" width="60" height="50" rx="4" fill="%23bdbdbd"/><rect x="110" y="140" width="80" height="60" rx="4" fill="%23bdbdbd"/><rect x="200" y="155" width="70" height="45" rx="4" fill="%23bdbdbd"/><rect x="60" y="320" width="50" height="60" rx="4" fill="%23bdbdbd"/><rect x="120" y="310" width="90" height="70" rx="4" fill="%23bdbdbd"/><rect x="220" y="325" width="60" height="55" rx="4" fill="%23bdbdbd"/></g><g opacity="0.25"><path d="M30,500 L30,520 L50,520" stroke="%2366bb6a" stroke-width="2.5" fill="none"/><path d="M70,480 L70,530" stroke="%2366bb6a" stroke-width="2.5" fill="none"/><circle cx="95" cy="505" r="15" fill="%2366bb6a"/><path d="M290,520 L310,520 L310,500" stroke="%2366bb6a" stroke-width="2.5" fill="none"/><rect x="250" y="490" width="30" height="30" rx="15" fill="%2366bb6a"/></g></svg>');
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

.map-view::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(255, 255, 255, 0.1) 100%
    );
}

.map-marker {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: markerBounce 2s ease-in-out infinite;
}

.marker-1 {
    top: 25%;
    left: 30%;
}

.marker-2 {
    top: 55%;
    right: 25%;
    animation-delay: 1s;
}

@keyframes markerBounce {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.marker-pulse {
    position: absolute;
    width: 60px;
    height: 60px;
    border: 2px solid var(--primary-500);
    border-radius: 50%;
    animation: markerPulse 2s ease-out infinite;
}

@keyframes markerPulse {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    100% {
        transform: scale(2);
        opacity: 0;
    }
}

.marker-icon {
    position: relative;
    width: 44px;
    height: 44px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: var(--shadow-lg);
    z-index: 2;
}

.map-route {
    position: absolute;
    top: 35%;
    left: 35%;
    width: 40%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-500), var(--purple-500));
    opacity: 0.6;
    transform: rotate(-25deg);
    box-shadow: 0 2px 4px rgba(102, 126, 234, 0.3);
}

.app-bottom-sheet {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-radius: 24px 24px 0 0;
    padding: var(--space-4);
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.1);
}

.sheet-handle {
    width: 40px;
    height: 4px;
    background: var(--gray-300);
    border-radius: var(--radius-full);
    margin: 0 auto var(--space-4);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.avatar-small {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

.info-text .name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.info-text .status {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

/* ==========================================
   使用场景区 - 精致版
   ========================================== */
.scenarios {
    padding: var(--space-16) 0;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-12);
}

.section-header.centered {
    text-align: center;
}

.section-tag {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: var(--gradient-soft);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--primary-600);
    margin-bottom: var(--space-4);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.section-tag.light {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    color: white;
}

.section-title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.section-title.light {
    color: white;
}

.section-description {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--text-secondary);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.scenario-card {
    position: relative;
    background: white;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.scenario-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.scenario-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.scenario-number {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    color: var(--gray-100);
}

.scenario-icon {
    margin-bottom: var(--space-5);
}

.icon-circle {
    width: 72px;
    height: 72px;
    background: var(--gradient-soft);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.scenario-card h3 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.scenario-card p {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.scenario-highlight {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

/* ==========================================
   下载区域 - 精致版
   ========================================== */
.download {
    position: relative;
    padding: var(--space-16) 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.download::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
    border-radius: 50%;
}

.download-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-12);
    align-items: center;
    position: relative;
    z-index: 1;
}

.coming-soon-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(20px);
    border: 1.5px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: white;
    margin-bottom: var(--space-5);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    animation: comingSoonPulse 2s ease-in-out infinite;
}

.coming-soon-badge svg {
    width: 16px;
    height: 16px;
    color: rgba(255, 255, 255, 0.9);
    animation: comingSoonRotate 3s linear infinite;
}

@keyframes comingSoonPulse {
    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 6px 30px rgba(0, 0, 0, 0.25);
    }
}

@keyframes comingSoonRotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.download-description {
    font-size: var(--font-size-xl);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-8);
}

.download-platforms {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.platform-btn {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all 0.2s;
}

.platform-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.platform-icon {
    width: 32px;
    height: 32px;
    color: white;
}

.platform-text {
    display: flex;
    flex-direction: column;
}

.platform-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.platform-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: white;
}

.download-features {
    display: flex;
    gap: var(--space-6);
}

.mini-feature {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
}

.mini-feature svg {
    color: rgba(255, 255, 255, 0.8);
    flex-shrink: 0;
}

.download-visual {
    display: flex;
    justify-content: center;
}

.qr-container {
    text-align: center;
}

.qr-glow {
    position: absolute;
    inset: -30px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3), transparent);
    filter: blur(40px);
}

.qr-code {
    position: relative;
    width: 220px;
    height: 220px;
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-5);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    margin-bottom: var(--space-4);
}

.qr-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-icon {
    width: 80px;
    height: 80px;
    color: var(--gray-400);
}

.qr-hint {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: rgba(255, 255, 255, 0.9);
}

/* ==========================================
   页脚
   ========================================== */
.footer {
    background: var(--gray-900);
    color: white;
    padding: var(--space-12) 0 var(--space-6);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-12);
    margin-bottom: var(--space-10);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-4);
}

.footer-logo .logo-icon {
    font-size: 2rem;
}

.footer-slogan {
    font-size: var(--font-size-base);
    color: var(--gray-400);
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

.footer-column h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-4);
    color: white;
}

.footer-column ul {
    list-style: none;
}

.footer-column a {
    display: block;
    padding: var(--space-2) 0;
    font-size: var(--font-size-sm);
    color: var(--gray-400);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-6);
    border-top: 1px solid var(--gray-800);
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .hero-title {
        font-size: var(--font-size-5xl);
    }

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

    .download-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: calc(72px + var(--space-10));
        padding-bottom: var(--space-12);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-4);
    }

    .stat-divider {
        width: 100%;
        height: 1px;
    }

    .nav-links {
        gap: var(--space-4);
    }

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

    .section-title {
        font-size: var(--font-size-4xl);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .download-platforms {
        flex-direction: column;
    }

    .phone-mockup {
        width: 280px;
        height: 560px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-buttons {
        flex-direction: column;
    }

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