/* ============================================
   SafeW 官方网站样式表
   版本: 1.0.0
   适用于: index.html
   描述: Windows专属加密工具 | 深色科技风 | 粒子背景
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --bg-deep: #080c1a;
    --bg-elevated: rgba(255, 255, 255, 0.03);
    --bg-elevated-hover: rgba(255, 255, 255, 0.06);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-active: rgba(0, 212, 255, 0.35);
    --text-primary: #e8f0f8;
    --text-secondary: rgba(255, 255, 255, 0.55);
    --text-tertiary: rgba(255, 255, 255, 0.35);
    --text-muted: rgba(255, 255, 255, 0.2);
    --accent-cyan: #00d4ff;
    --accent-blue: #4a9eff;
    --accent-purple: #7b61ff;
    --gradient-primary: linear-gradient(135deg, #00d4ff, #4a9eff);
    --gradient-logo: linear-gradient(135deg, #00d4ff, #7b61ff);
    --gradient-text-hero: linear-gradient(135deg, #ffffff 20%, #00d4ff 100%);
    --shadow-card-hover: 0 20px 60px rgba(0, 0, 0, 0.45);
    --shadow-btn-glow: 0 10px 50px rgba(0, 212, 255, 0.35);
    --radius-card: 20px;
    --radius-btn: 40px;
    --transition-fast: 0.25s ease;
    --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'JetBrains Mono', monospace;
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-deep);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ---------- 粒子画布 ---------- */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    background: radial-gradient(ellipse at 50% 0%, #0a1025 0%, var(--bg-deep) 65%);
}

/* ---------- 站点容器 ---------- */
.site-wrapper {
    position: relative;
    z-index: 1;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 头部 ---------- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
    border-bottom: 1px solid rgba(0, 212, 255, 0.07);
    position: relative;
    z-index: 10;
}

/* Logo */
.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-wrapper svg {
    display: block;
    width: 38px;
    height: 38px;
    transition: transform var(--transition-smooth);
}

.logo-wrapper:hover svg {
    transform: rotate(-3deg) scale(1.05);
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 1.5px;
    background: var(--gradient-logo);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.logo-text span {
    font-size: 11px;
    font-weight: 400;
    -webkit-text-fill-color: rgba(255, 255, 255, 0.35);
    background: none;
    margin-left: 4px;
    letter-spacing: 2px;
}

/* 导航 */
nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

nav a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    transition: color var(--transition-fast), border-color var(--transition-fast);
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    letter-spacing: 0.3px;
    white-space: nowrap;
}

nav a:hover,
nav a.active {
    color: var(--accent-cyan);
    border-bottom-color: var(--accent-cyan);
}

/* 导航下拉 */
.nav-dropdown {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-dropdown-btn {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    font-weight: 400;
    padding: 4px 0;
    letter-spacing: 0.3px;
    border-bottom: 2px solid transparent;
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
}

.nav-dropdown-btn:hover {
    color: var(--accent-cyan);
}

.dropdown-arrow {
    font-size: 10px;
    transition: transform var(--transition-fast);
}

.nav-dropdown.dropdown-open .dropdown-arrow {
    transform: rotate(180deg);
}

.nav-dropdown-content {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 180px;
    background: rgba(10, 16, 35, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 14px;
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    z-index: 50;
}

.nav-dropdown.dropdown-open .nav-dropdown-content {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(6px);
}

.nav-dropdown-content a {
    display: block;
    padding: 10px 18px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    border-bottom: none !important;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-dropdown-content a:hover {
    background: rgba(0, 212, 255, 0.08);
    color: var(--accent-cyan);
}

/* 导航 CTA */
.nav-cta {
    background: var(--gradient-primary);
    color: #080c1a !important;
    padding: 8px 22px !important;
    border-radius: var(--radius-btn);
    font-weight: 600;
    border-bottom: none !important;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    font-size: 14px !important;
    -webkit-text-fill-color: #080c1a !important;
    letter-spacing: 0.3px;
}

.nav-cta:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
    border-bottom-color: transparent !important;
}

/* 移动端开关 */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
    z-index: 100;
}

.mobile-toggle span {
    display: block;
    width: 26px;
    height: 2.5px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ---------- 主体 ---------- */
main {
    padding: 10px 0 0;
}

/* ============================================
   Hero 区域
   ============================================ */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    padding: 30px 0 50px;
    min-height: 78vh;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.08;
    margin-bottom: 10px;
    background: var(--gradient-text-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.hero-content .subtitle {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.45);
    font-weight: 400;
    margin-bottom: 6px;
    letter-spacing: 4px;
    text-transform: uppercase;
}

.hero-content .tagline {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 400;
    margin-bottom: 16px;
    line-height: 1.7;
}

.hero-content .description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 26px;
    max-width: 540px;
}

.hero-content .description strong {
    color: var(--accent-cyan);
    font-weight: 500;
}

/* Hero 按钮 */
.hero-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #080c1a;
    padding: 14px 34px;
    border-radius: var(--radius-btn);
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
    -webkit-text-fill-color: #080c1a;
    letter-spacing: 0.2px;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.6s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-btn-glow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    padding: 14px 30px;
    border-radius: var(--radius-btn);
    font-weight: 500;
    font-size: 15px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(0, 212, 255, 0.4);
    transform: translateY(-2px);
}

/* 信任徽章 */
.hero-trust-badges {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 0.3px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
    animation: badge-pulse 2s ease-in-out infinite;
}

@keyframes badge-pulse {
    0%,
    100% {
        box-shadow: 0 0 6px rgba(0, 212, 255, 0.4);
    }
    50% {
        box-shadow: 0 0 14px rgba(0, 212, 255, 0.8);
    }
}

/* ---------- Windows 窗口模拟 ---------- */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.windows-mockup {
    width: 100%;
    max-width: 420px;
    background: rgba(10, 16, 35, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 50px rgba(0, 212, 255, 0.04);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.windows-mockup:hover {
    transform: translateY(-4px);
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.7), 0 0 70px rgba(0, 212, 255, 0.08);
}

.mockup-titlebar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mockup-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.mockup-dot.red {
    background: #ff5f56;
}
.mockup-dot.yellow {
    background: #ffbd2e;
}
.mockup-dot.green {
    background: #27c93f;
}

.mockup-title {
    margin-left: 12px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.45);
    font-family: var(--font-mono);
    letter-spacing: 0.2px;
}

.mockup-body {
    display: flex;
    min-height: 260px;
}

.mockup-sidebar {
    width: 70px;
    background: rgba(255, 255, 255, 0.025);
    padding: 18px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    border-right: 1px solid rgba(255, 255, 255, 0.04);
}

.mockup-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.7;
    margin-bottom: 6px;
}

.mockup-sidebar-line {
    width: 70%;
    height: 4px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
}

.mockup-sidebar-line.short {
    width: 45%;
}

.mockup-sidebar-line.medium {
    width: 60%;
}

.mockup-chat {
    flex: 1;
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mockup-msg {
    display: flex;
}

.mockup-msg.received {
    justify-content: flex-start;
}

.mockup-msg.sent {
    justify-content: flex-end;
}

.mockup-bubble {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 14px;
    font-size: 12px;
    line-height: 1.5;
    letter-spacing: 0.2px;
}

.mockup-msg.received .mockup-bubble {
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.75);
    border-bottom-left-radius: 4px;
}

.mockup-msg.sent .mockup-bubble {
    background: rgba(0, 212, 255, 0.15);
    color: var(--accent-cyan);
    border-bottom-right-radius: 4px;
}

.mockup-encrypt-indicator {
    margin-top: auto;
    padding: 8px 12px;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 10px;
    font-size: 11px;
    color: rgba(0, 212, 255, 0.7);
    text-align: center;
    letter-spacing: 0.3px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.lock-icon {
    font-size: 14px;
}

.mockup-statusbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 11px;
    color: rgba(255, 255, 255, 0.3);
    font-family: var(--font-mono);
    letter-spacing: 0.2px;
}

/* ---------- 分隔线 ---------- */
.glow-line {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.15), transparent);
    margin: 10px 0 20px;
}

/* ============================================
   数据信任带
   ============================================ */
.trust-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 28px 32px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-card);
    margin: 10px 0 30px;
    flex-wrap: wrap;
}

.trust-strip-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-align: center;
    flex: 1;
    min-width: 120px;
}

.trust-number {
    font-size: 30px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.trust-unit {
    font-size: 14px;
    font-weight: 500;
    -webkit-text-fill-color: rgba(255, 255, 255, 0.4);
    margin-left: 2px;
}

.trust-label {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 0.5px;
}

.trust-strip-divider {
    width: 1px;
    height: 36px;
    background: rgba(255, 255, 255, 0.06);
    flex-shrink: 0;
}

/* ============================================
   功能特性区域
   ============================================ */
.features {
    padding: 20px 0 30px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #ffffff, #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.3px;
}

.section-sub {
    color: rgba(255, 255, 255, 0.4);
    font-size: 15px;
    font-weight: 300;
    margin-bottom: 36px;
    letter-spacing: 0.5px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
    margin-top: 8px;
}

.feature-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
    padding: 28px 22px;
    transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth), background var(--transition-fast);
    text-align: left;
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20px;
    right: 20px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
    opacity: 0;
    transform: scaleX(0);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    transform-origin: center;
}

.feature-card:hover::after {
    opacity: 0.6;
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-active);
    box-shadow: var(--shadow-card-hover);
    background: var(--bg-elevated-hover);
}

.feature-card .f-icon {
    font-size: 30px;
    margin-bottom: 12px;
    display: block;
    line-height: 1;
}

.feature-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #fff;
    letter-spacing: 0.2px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.75;
}

.feature-card .highlight {
    color: var(--accent-cyan);
    font-weight: 500;
}

/* ============================================
   加密流程可视化
   ============================================ */
.encryption-flow {
    padding: 40px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    margin-top: 20px;
}

.flow-container {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.flow-step {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 22px 18px;
    flex: 1;
    min-width: 180px;
    max-width: 240px;
    text-align: center;
    transition: border-color var(--transition-fast), transform var(--transition-smooth);
}

.flow-step:hover {
    border-color: rgba(0, 212, 255, 0.25);
    transform: translateY(-3px);
}

.flow-step-icon {
    font-size: 32px;
    margin-bottom: 10px;
    display: block;
}

.flow-step-title {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 6px;
}

.flow-step-desc {
    font-size: 12px;
    color: var(--text-tertiary);
    line-height: 1.7;
}

.flow-arrow {
    display: flex;
    align-items: center;
    font-size: 20px;
    color: rgba(0, 212, 255, 0.5);
    flex-shrink: 0;
    padding: 0 4px;
}

/* ============================================
   安全对比表格
   ============================================ */
.security-comparison {
    padding: 40px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    margin-top: 20px;
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-top: 8px;
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    min-width: 600px;
}

.comparison-table thead {
    background: rgba(0, 212, 255, 0.05);
}

.comparison-table th {
    padding: 14px 18px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    color: #fff;
    letter-spacing: 0.5px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.comparison-table td {
    padding: 13px 18px;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    font-size: 13px;
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.vs-tag {
    display: inline-block;
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 20px;
    background: rgba(0, 212, 255, 0.12);
    color: var(--accent-cyan);
    margin-left: 6px;
    font-weight: 400;
    letter-spacing: 0.3px;
    vertical-align: middle;
}

.cell-yes {
    color: #4ade80 !important;
    font-weight: 500;
}

.cell-no {
    color: rgba(255, 100, 100, 0.7) !important;
}

/* ============================================
   应用场景
   ============================================ */
.use-scenarios {
    padding: 40px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    margin-top: 20px;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-top: 8px;
}

.scenario-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
    padding: 26px 22px;
    transition: border-color var(--transition-fast), transform var(--transition-smooth), background var(--transition-fast);
    text-align: center;
}

.scenario-card:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-4px);
    background: var(--bg-elevated-hover);
}

.scenario-icon {
    font-size: 36px;
    display: block;
    margin-bottom: 12px;
}

.scenario-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.scenario-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 14px;
}

.scenario-tag {
    display: inline-block;
    font-size: 11px;
    padding: 4px 12px;
    border-radius: 20px;
    background: rgba(123, 97, 255, 0.12);
    color: var(--accent-purple);
    letter-spacing: 0.3px;
    font-weight: 400;
}

/* ============================================
   社交证明
   ============================================ */
.social-proof {
    padding: 40px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    margin-top: 20px;
}

.proof-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    margin: 20px 0 30px;
}

.proof-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-align: center;
}

.proof-number {
    font-size: 32px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.proof-decimal {
    font-size: 18px;
    font-weight: 500;
    -webkit-text-fill-color: rgba(255, 255, 255, 0.4);
}

.proof-label {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 0.5px;
}

.testimonial-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    margin-top: 10px;
}

.testimonial-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 22px 20px;
    border-left: 3px solid rgba(0, 212, 255, 0.3);
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.testimonial-card:hover {
    border-left-color: var(--accent-cyan);
    background: var(--bg-elevated-hover);
}

.testimonial-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
    font-style: italic;
}

.testimonial-card footer {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 0.3px;
    border-top: none;
    padding: 0;
    margin: 0;
    font-style: normal;
}

/* ============================================
   下载 CTA
   ============================================ */
.download-cta {
    padding: 30px 0 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    margin-top: 20px;
}

.cta-inner {
    display: flex;
    align-items: center;
    gap: 40px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(123, 97, 255, 0.06));
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 24px;
    padding: 36px 40px;
    flex-wrap: wrap;
}

.cta-text {
    flex: 2;
    min-width: 280px;
}

.cta-text h2 {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
    letter-spacing: -0.3px;
}

.cta-text p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.cta-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.cta-meta {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.3px;
    font-family: var(--font-mono);
}

.cta-qr {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 140px;
}

.qr-placeholder {
    width: 130px;
    height: 130px;
    background: rgba(255, 255, 255, 0.04);
    border: 2px dashed rgba(0, 212, 255, 0.25);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: border-color var(--transition-fast);
}

.qr-placeholder:hover {
    border-color: rgba(0, 212, 255, 0.5);
}

.qr-icon {
    font-size: 32px;
}

.qr-text {
    font-size: 11px;
    color: var(--text-tertiary);
    letter-spacing: 0.5px;
}

/* ============================================
   页脚
   ============================================ */
footer {
    padding: 40px 0 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    margin-top: 10px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-brand .logo-wrapper {
    margin-bottom: 12px;
}

.footer-brand p {
    color: var(--text-tertiary);
    font-size: 13px;
    line-height: 1.8;
    max-width: 280px;
}

.footer-col h4 {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}

.footer-col a {
    display: block;
    color: rgba(255, 255, 255, 0.35);
    text-decoration: none;
    font-size: 13px;
    line-height: 2.4;
    transition: color var(--transition-fast);
    letter-spacing: 0.2px;
}

.footer-col a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom .copy {
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 0.3px;
}

.footer-social {
    display: flex;
    gap: 14px;
}

.footer-social a {
    color: rgba(255, 255, 255, 0.25);
    text-decoration: none;
    font-size: 16px;
    transition: color var(--transition-fast), transform var(--transition-fast);
    display: inline-block;
}

.footer-social a:hover {
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

/* ============================================
   响应式设计
   ============================================ */

/* 大平板 */
@media (max-width: 992px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
        min-height: auto;
    }
    .hero-content .description {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }
    .hero-buttons {
        justify-content: center;
    }
    .hero-trust-badges {
        justify-content: center;
    }
    .hero-content h1 {
        font-size: 44px;
    }
    .windows-mockup {
        max-width: 380px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .footer-brand p {
        max-width: 100%;
    }
    .cta-inner {
        flex-direction: column;
        text-align: center;
    }
    .cta-buttons {
        justify-content: center;
    }
}

/* 平板 */
@media (max-width: 768px) {
    /* 移动端导航 */
    nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: rgba(8, 12, 26, 0.98);
        flex-direction: column;
        padding: 80px 24px 40px;
        gap: 12px;
        transition: right 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        border-left: 1px solid rgba(0, 212, 255, 0.08);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        align-items: flex-start;
        overflow-y: auto;
        z-index: 90;
    }
    nav.open {
        right: 0;
    }
    .mobile-toggle {
        display: flex;
        z-index: 100;
    }
    .mobile-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    .mobile-toggle.open span:nth-child(2) {
        opacity: 0;
    }
    .mobile-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    nav a {
        font-size: 16px;
        padding: 6px 0;
    }
    .nav-cta {
        margin-top: 8px;
    }
    .nav-dropdown {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }
    .nav-dropdown-btn {
        font-size: 16px;
        padding: 6px 0;
    }
    .nav-dropdown-content {
        position: static;
        transform: none;
        min-width: 100%;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        background: none;
        border: none;
        padding: 0 0 0 16px;
        box-shadow: none;
        display: none;
    }
    .nav-dropdown.dropdown-open .nav-dropdown-content {
        display: block;
        transform: none;
    }
    .nav-dropdown-content a {
        padding: 8px 0;
        font-size: 14px;
    }
    .hero-content h1 {
        font-size: 36px;
    }
    .features-grid {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }
    .flow-container {
        flex-direction: column;
        align-items: center;
        gap: 6px;
    }
    .flow-arrow {
        transform: rotate(90deg);
        padding: 2px 0;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 22px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .trust-strip {
        gap: 14px;
        padding: 20px 16px;
    }
    .trust-strip-divider {
        display: none;
    }
    .proof-grid {
        gap: 20px;
    }
    .section-title {
        font-size: 26px;
    }
    .cta-inner {
        padding: 24px 20px;
    }
}

/* 手机 */
@media (max-width: 480px) {
    .site-wrapper {
        padding: 0 14px;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .hero-content h1 {
        font-size: 30px;
    }
    .hero-content .tagline {
        font-size: 16px;
    }
    .hero-content .description {
        font-size: 14px;
    }
    .windows-mockup {
        max-width: 100%;
    }
    .mockup-body {
        min-height: 200px;
    }
    .btn-primary,
    .btn-secondary {
        padding: 12px 22px;
        font-size: 14px;
        width: 100%;
        justify-content: center;
    }
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    .trust-badge {
        font-size: 11px;
    }
    .comparison-table th,
    .comparison-table td {
        padding: 10px 12px;
        font-size: 12px;
    }
    .scenario-card {
        padding: 20px 16px;
    }
    .cta-text h2 {
        font-size: 20px;
    }
    .logo-text {
        font-size: 20px;
    }
    .logo-text span {
        font-size: 9px;
    }
    .trust-number {
        font-size: 24px;
    }
    .proof-number {
        font-size: 26px;
    }
    .testimonial-cards {
        grid-template-columns: 1fr;
    }
    .qr-placeholder {
        width: 100px;
        height: 100px;
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .btn-primary::before {
        display: none;
    }
    .badge-dot {
        animation: none;
    }
}