/* ============================================
   影子跟读 - 全局样式
   ============================================ */

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

:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-100: #f3f4f6;
    --white: #ffffff;
    --green: #10b981;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-3: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--white);
    overflow-x: hidden;
}

/* ---- 导航栏 ---- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--dark);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
    font-weight: 700;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-2);
    transition: width 0.3s;
}

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

.nav-cta {
    padding: 0.6rem 1.5rem;
    background: var(--gradient-2);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
}

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

/* ---- Hero ---- */
.hero {
    margin-top: 70px;
    padding: 6rem 2rem 4rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--dark);
}

.hero-content h1 span {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.15rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.btn-primary {
    padding: 1rem 2rem;
    background: var(--gradient-2);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    padding: 1rem 2rem;
    background: white;
    color: var(--gray-800);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
    border: 2px solid var(--gray-300);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray-600);
}

.hero-image { position: relative; }

.hero-image img {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, #e0e7ff 0%, #ddd6fe 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    font-size: 1rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    border: 2px dashed var(--gray-400);
}

/* ---- 通用板块头 ---- */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray-600);
}

/* ---- 功能特性 ---- */
.features {
    padding: 6rem 2rem;
    background: white;
}

.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.feature-card {
    padding: 2rem 1.5rem;
    background: white;
    border-radius: 16px;
    border: 1px solid var(--gray-300);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-2);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-color: transparent;
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.2rem;
}

.feature-icon.blue { background: rgba(59, 130, 246, 0.1); }
.feature-icon.purple { background: rgba(139, 92, 246, 0.1); }
.feature-icon.cyan { background: rgba(6, 182, 212, 0.1); }
.feature-icon.green { background: rgba(34, 197, 94, 0.1); }
.feature-icon.orange { background: rgba(249, 115, 22, 0.1); }
.feature-icon.pink { background: rgba(236, 72, 153, 0.1); }

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.6rem;
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.9rem;
}

/* ============================================
   痛点分析 - 全新设计
   ============================================ */
.pain-points {
    padding: 6rem 2rem;
    background: linear-gradient(160deg, #0f172a 0%, #1e293b 40%, #0f172a 100%);
    position: relative;
    overflow: hidden;
}

.pain-points::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59,130,246,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.pain-points::after {
    content: '';
    position: absolute;
    bottom: -200px;
    left: -200px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139,92,246,0.06) 0%, transparent 70%);
    border-radius: 50%;
}

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

.pain-header {
    text-align: center;
    margin-bottom: 4rem;
}

.pain-header .section-tag {
    background: rgba(59, 130, 246, 0.15);
    color: #93c5fd;
}

.pain-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #f1f5f9;
    margin-bottom: 1rem;
}

.pain-header p {
    font-size: 1.1rem;
    color: #94a3b8;
}

/* 痛点统计条 */
.pain-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

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

.pain-stat .num {
    font-size: 2.4rem;
    font-weight: 800;
    background: linear-gradient(135deg, #f87171 0%, #fb923c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.pain-stat .label {
    font-size: 0.85rem;
    color: #64748b;
    margin-top: 0.2rem;
}

/* 痛点网格 */
.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.pain-card {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.9) 100%);
    backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 1.8rem 1.6rem;
    border: 1px solid rgba(148, 163, 184, 0.15);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.pain-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, #ef4444 0%, #f97316 50%, #eab308 100%);
    opacity: 0;
    transition: opacity 0.3s;
}

.pain-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(239, 68, 68, 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
}

.pain-card:hover {
    transform: translateY(-6px) scale(1.02);
    border-color: rgba(239, 68, 68, 0.3);
    box-shadow: 0 20px 50px rgba(239, 68, 68, 0.15), 0 0 0 1px rgba(239, 68, 68, 0.1);
}

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

.pain-card:hover::after {
    opacity: 1;
}

.pain-card-top {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 1.2rem;
}

.pain-num {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(249, 115, 22, 0.2) 100%);
    color: #fb923c;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    flex-shrink: 0;
    border: 1px solid rgba(239, 68, 68, 0.3);
    text-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

.pain-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    background: linear-gradient(135deg, rgba(251, 146, 60, 0.15) 0%, rgba(234, 179, 8, 0.15) 100%);
    flex-shrink: 0;
    border: 1px solid rgba(251, 146, 60, 0.2);
    box-shadow: 0 4px 12px rgba(251, 146, 60, 0.1);
}

.pain-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #f1f5f9;
    flex: 1;
    margin: 0;
    line-height: 1.4;
    letter-spacing: 0.3px;
}

.pain-card .problem {
    color: #fecaca;
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 1rem;
    padding: 0.8rem 1rem;
    border-left: 3px solid rgba(239, 68, 68, 0.5);
    background: linear-gradient(90deg, rgba(239, 68, 68, 0.08) 0%, transparent 100%);
    border-radius: 0 8px 8px 0;
}

.pain-card .solution {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: #86efac;
    font-size: 0.9rem;
    line-height: 1.7;
    font-weight: 600;
    padding: 0.9rem 1rem;
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(16, 185, 129, 0.08) 100%);
    border-radius: 10px;
    border: 1px solid rgba(34, 197, 94, 0.2);
    box-shadow: 0 2px 8px rgba(34, 197, 94, 0.1);
}

.pain-card .solution::before {
    content: '✅';
    font-size: 0.9rem;
    flex-shrink: 0;
    margin-top: 2px;
}

/* ---- 对比区域 ---- */
.comparison {
    padding: 6rem 2rem;
    background: white;
}

.comparison-container {
    max-width: 1100px;
    margin: 0 auto;
}

.comparison-table {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 60px rgba(0,0,0,0.08);
    border: 1px solid var(--gray-300);
}

.comparison-header {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
}

.comparison-header .col-category {
    padding: 1.2rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-right: 1px solid rgba(255,255,255,0.1);
}

.comparison-header .col-other {
    padding: 1.2rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    border-right: 1px solid rgba(255,255,255,0.1);
    color: #f87171;
}

.comparison-header .col-us {
    padding: 1.2rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    color: #4ade80;
}

.comparison-category {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    color: white;
    padding: 0.8rem 1.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    border-bottom: 1px solid #f1f5f9;
    transition: background 0.2s;
}

.comparison-row:hover {
    background: #f8fafc;
}

.comparison-row:last-child {
    border-bottom: none;
}

.comparison-row .cell {
    padding: 0.85rem 1.2rem;
    font-size: 0.88rem;
    line-height: 1.5;
    display: flex;
    align-items: center;
    gap: 8px;
}

.comparison-row .cell:nth-child(1) {
    color: var(--gray-700);
    font-weight: 500;
    border-right: 1px solid #f1f5f9;
}

.comparison-row .cell:nth-child(2) {
    color: #b91c1c;
    background: rgba(254, 226, 226, 0.3);
    border-right: 1px solid #f1f5f9;
    justify-content: flex-start;
    text-align: left;
}

.comparison-row .cell:nth-child(3) {
    color: #15803d;
    background: rgba(220, 252, 231, 0.3);
    justify-content: flex-start;
    text-align: left;
    font-weight: 500;
}

/* ---- 截图展示 ---- */
.screenshots {
    padding: 6rem 2rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

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

.screenshot-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    padding: 0.8rem 1.8rem;
    background: white;
    border: 2px solid var(--gray-300);
    border-radius: 10px;
    font-weight: 600;
    color: var(--gray-700);
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn.active {
    background: var(--gradient-2);
    color: white;
    border-color: transparent;
}

.tab-btn:hover:not(.active) {
    border-color: var(--primary);
    color: var(--primary);
}

.screenshot-content {
    display: none;
}

.screenshot-content.active {
    display: block;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.screenshot-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}

.screenshot-text h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
}

.screenshot-text p {
    font-size: 1.05rem;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.screenshot-text ul {
    list-style: none;
    padding: 0;
}

.screenshot-text li {
    padding: 0.5rem 0;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 10px;
}

.screenshot-text li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
    font-size: 1.2rem;
}

.screenshot-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

/* ---- CTA ---- */
.cta-section {
    padding: 6rem 2rem;
    background: var(--gradient-2);
    text-align: center;
    color: white;
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-btn {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: white;
    color: var(--primary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s;
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

/* ---- Footer ---- */
footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 3rem 2rem 2rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-brand .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
}

.footer-brand span {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-copyright {
    width: 100%;
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid var(--gray-700);
    font-size: 0.9rem;
}

/* ============================================
   下载页面样式
   ============================================ */

/* 下载页 body 覆盖 */
body.page-download {
    background: var(--gray-100);
    min-height: 100vh;
}

body.page-download .navbar {
    position: sticky;
}

.main-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
}

.page-header h1 span {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    font-size: 1.15rem;
    color: var(--gray-600);
}

.download-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.download-card {
    background: white;
    border-radius: 20px;
    padding: 3rem 2.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
}

.download-card.available {
    border: 2px solid var(--green);
    box-shadow: 0 10px 40px rgba(16, 185, 129, 0.15);
}

.download-card.coming-soon {
    border: 2px solid var(--gray-300);
    opacity: 0.85;
}

.download-card.available:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(16, 185, 129, 0.2);
}

.card-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-available {
    background: rgba(16, 185, 129, 0.1);
    color: var(--green);
}

.badge-coming {
    background: rgba(107, 114, 128, 0.1);
    color: var(--gray-500);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    font-size: 2.5rem;
}

.card-icon.windows { background: linear-gradient(135deg, #0078d4 0%, #00a4ef 100%); color: white; }
.card-icon.mac { background: linear-gradient(135deg, #a2aaad 0%, #d4d4d8 100%); color: white; }
.card-icon.android { background: linear-gradient(135deg, #3ddc84 0%, #00a956 100%); color: white; }
.card-icon.ios { background: linear-gradient(135deg, #007aff 0%, #5856d6 100%); color: white; }

.card-icon svg {
    width: 40px;
    height: 40px;
    fill: white;
}

.download-card h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.card-version {
    color: var(--gray-500);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.card-features {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.card-features li {
    padding: 0.5rem 0;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
}

.card-features li::before {
    content: '✓';
    color: var(--green);
    font-weight: 700;
}

.download-card.coming-soon .card-features li::before {
    content: '○';
    color: var(--gray-400);
}

.download-btn {
    display: inline-block;
    width: 100%;
    padding: 1.2rem 2rem;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.download-btn.primary {
    background: var(--gradient-2);
    color: white;
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.download-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(59, 130, 246, 0.4);
}

.download-btn.disabled {
    background: var(--gray-300);
    color: var(--gray-600);
    cursor: not-allowed;
}

.coming-soon-text {
    display: block;
    margin-top: 1rem;
    color: var(--gray-500);
    font-size: 0.9rem;
}

.requirements-section {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    margin-bottom: 3rem;
}

.requirements-section h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.requirement-item {
    padding: 1.5rem;
    background: var(--gray-100);
    border-radius: 12px;
}

.requirement-item .label {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 0.3rem;
}

.requirement-item .value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
}

.install-guide {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    margin-bottom: 3rem;
}

.install-guide h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.step {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--gray-100);
    border-radius: 12px;
    position: relative;
}

.step::after {
    content: '→';
    position: absolute;
    right: -1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: 1.5rem;
}

.step:last-child::after { display: none; }

.step-number {
    width: 36px;
    height: 36px;
    background: var(--gradient-2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.step p {
    font-size: 0.85rem;
    color: var(--gray-600);
}

.faq-section {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
}

.faq-section h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.faq-item {
    border-bottom: 1px solid var(--gray-300);
    padding: 1.2rem 0;
}

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

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    color: var(--dark);
    font-size: 1.05rem;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform 0.3s;
}

.faq-item.active .faq-question::after {
    content: '−';
}

.faq-answer {
    display: none;
    padding-top: 1rem;
    color: var(--gray-600);
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    display: block;
}

.mobile-section {
    background: white;
    border-radius: 20px;
    padding: 3rem 2.5rem;
    margin-bottom: 3rem;
}

.mobile-section .download-cards {
    margin-bottom: 0;
}

/* 下载页 footer */
body.page-download footer {
    padding: 2rem;
    text-align: center;
    margin-top: 4rem;
}

body.page-download footer a {
    color: var(--gray-400);
    text-decoration: none;
    margin: 0 1rem;
}

body.page-download footer a:hover {
    color: white;
}

/* ---- 响应式 ---- */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content h1 { font-size: 2.5rem; }
    .hero-buttons, .hero-stats { justify-content: center; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .pain-grid { grid-template-columns: repeat(2, 1fr); }
    .comparison-row .cell { font-size: 0.8rem; padding: 0.7rem 0.8rem; }
    .screenshot-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .download-cards { grid-template-columns: 1fr; }
    .requirements-grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .step::after {
        content: '↓';
        right: 50%;
        top: auto;
        bottom: -1.5rem;
        transform: translateX(50%);
    }
    .step:last-child::after { display: none; }
    .page-header h1 { font-size: 2rem; }
    .nav-links { display: none; }
}

@media (max-width: 640px) {
    .nav-menu { display: none; }
    .features-grid { grid-template-columns: 1fr; }
    .pain-grid { grid-template-columns: 1fr; }
    .comparison-header .cell,
    .comparison-row .cell { font-size: 0.75rem; padding: 0.6rem 0.5rem; }
    .hero-content h1 { font-size: 2rem; }
    .section-header h2 { font-size: 2rem; }
    .pain-stats { gap: 1.5rem; }
}

/* ---- 图片放大遮罩层 ---- */
.lightbox-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    cursor: zoom-out;
}

.lightbox-overlay.active {
    display: flex;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: 8px;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
    animation: lightboxFadeIn 0.3s ease;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 40px;
    color: #fff;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s;
}

.lightbox-close:hover {
    transform: scale(1.2);
}

@keyframes lightboxFadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

/* 可点击放大的图片样式 */
.hero-image img,
.screenshot-image img {
    cursor: zoom-in;
    transition: transform 0.3s ease;
}

.hero-image img:hover,
.screenshot-image img:hover {
    transform: scale(1.02);
}