/* ===================================
   xinghuo-windsurf 官网样式
   高端极简风格 - 模仿 trumpcard.gov
   =================================== */

/* --- 全局变量 --- */
:root {
    /* 背景色 */
    --bg-body: #F5F5F0;
    --bg-section-alt: #EEEEE8;

    /* 主色调 - 金色点缀 */
    --primary: #1A1A1A;
    --primary-hover: #333333;
    --primary-light: rgba(26, 26, 26, 0.06);
    --accent-color: #C5A55A;
    --accent-hover: #B8963E;

    /* 卡片与边框 */
    --card-bg: #FFFFFF;
    --card-border: rgba(0, 0, 0, 0.08);
    --card-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);

    /* 文字色 */
    --text-main: #1A1A1A;
    --text-muted: #999999;
    --text-light: #666666;

    /* 圆角 */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-pill: 999px;

    /* 阴影 */
    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.08);

    /* 字体 - 衬线标题 + 无衬线正文（中英文分别优化） */
    --font-heading: 'Playfair Display', 'Noto Serif SC', '思源宋体', Georgia, serif;
    --font-body: 'Inter', 'Noto Sans SC', '思源黑体', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-body);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

ul {
    list-style: none;
}

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

/* --- 导航栏 --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(245, 245, 240, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--card-border);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(245, 245, 240, 0.98);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 18px;
    color: var(--text-main);
    letter-spacing: -0.3px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-icon svg {
    width: 20px;
    height: 20px;
}

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

.nav-link {
    padding: 10px 20px;
    border-radius: var(--radius-pill);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    transition: all 0.3s ease;
}

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

.nav-link-primary {
    background: var(--primary);
    color: white !important;
}

.nav-link-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* --- 英雄区域 --- */
.hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    padding: 160px 0 120px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: none;
}

.hero-particles {
    display: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease-out;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.hero-title {
    font-family: var(--font-heading);
    /* 响应式字号：最小36px，随视口缩放，最大64px */
    font-size: clamp(36px, 5.5vw, 64px);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 32px;
    /* 中文不宜太紧，-1px 足够 */
    letter-spacing: -1px;
    color: var(--text-main);
    animation: fadeInUp 0.6s ease-out 0.1s both;
    /* 防止中文字在奇怪位置断行 */
    word-break: keep-all;
    overflow-wrap: break-word;
}

.gradient-text {
    color: var(--text-main);
    -webkit-text-fill-color: var(--text-main);
    background: none;
}

.hero-description {
    font-size: 17px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 520px;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

/* --- 按钮样式 --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-pill);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    letter-spacing: 0.2px;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: none;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.btn-outline {
    background: transparent;
    color: var(--text-main);
    border: 1.5px solid var(--text-main);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* 金色按钮 */
.btn-gold {
    background: var(--accent-color);
    color: var(--primary);
    font-weight: 600;
}

.btn-gold:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

.btn-large {
    padding: 18px 40px;
    font-size: 16px;
}

/* --- 统计数据 --- */
.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

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

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 40px;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.2;
    letter-spacing: -1px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--card-border);
}

/* --- 英雄视觉区域 --- */
.hero-visual {
    position: relative;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero-mockup {
    position: relative;
    z-index: 2;
}

.mockup-frame {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.mockup-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: #FAFAFA;
    border-bottom: 1px solid var(--card-border);
}

.mockup-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red {
    background: #ff5f57;
}

.dot-yellow {
    background: #febc2e;
}

.dot-green {
    background: #28c840;
}

.mockup-title {
    flex: 1;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-right: 60px;
}

.mockup-content {
    padding: 8px;
}

.mockup-image {
    width: 100%;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* --- 浮动卡片（隐藏，极简设计不需要） --- */
.hero-floating-cards {
    display: none;
}

.floating-card {
    display: none;
}

.floating-card .card-icon {
    font-size: 20px;
}

.card-1 {
    top: 10%;
    right: -20px;
    animation-delay: 0s;
}

.card-2 {
    bottom: 30%;
    left: -30px;
    animation-delay: 2s;
}

.card-3 {
    bottom: 5%;
    right: 10%;
    animation-delay: 4s;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

/* --- 滚动指示器 --- */
.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.6;
    animation: scrollBounce 2s infinite;
}

.scroll-mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 13px;
    position: relative;
}

.scroll-wheel {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scrollWheelMove 2s infinite;
}

@keyframes scrollWheelMove {

    0%,
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    50% {
        opacity: 0.3;
        transform: translateX(-50%) translateY(6px);
    }
}

@keyframes scrollBounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(8px);
    }
}

.hero-scroll-indicator span {
    font-size: 12px;
    color: var(--text-muted);
}

/* --- 区块标题 --- */
.section-header {
    text-align: center;
    margin-bottom: 72px;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(28px, 4vw, 48px);
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-main);
    letter-spacing: -1px;
    line-height: 1.15;
    word-break: keep-all;
}

.section-description {
    font-size: 17px;
    color: var(--text-light);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.8;
}

/* --- 功能特性区域 --- */
.features {
    padding: 160px 0;
}

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

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all 0.3s ease;
    position: relative;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-card-large {
    grid-column: span 2;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 32px;
    align-items: start;
}

.feature-card-highlight {
    background: var(--card-bg);
    border-color: var(--accent-color);
    border-width: 1.5px;
}

.feature-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 6px 14px;
    background: var(--primary);
    color: white;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-pill);
    letter-spacing: 0.3px;
}

.feature-icon-wrapper {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.feature-icon {
    width: 24px;
    height: 24px;
    color: var(--text-main);
}

/* 统一图标色 */
.feature-icon-green {
    background: rgba(26, 26, 26, 0.04);
}

.feature-icon-green .feature-icon {
    color: var(--text-main);
}

.feature-icon-purple {
    background: rgba(26, 26, 26, 0.04);
}

.feature-icon-purple .feature-icon {
    color: var(--text-main);
}

.feature-icon-orange {
    background: rgba(26, 26, 26, 0.04);
}

.feature-icon-orange .feature-icon {
    color: var(--text-main);
}

.feature-icon-gradient {
    background: var(--accent-color);
}

.feature-icon-gradient .feature-icon {
    color: var(--primary);
}

.feature-title {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-main);
    letter-spacing: -0.5px;
}

.feature-description {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
}

.feature-list {
    margin-top: 16px;
}

.feature-list li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-light);
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--accent-color);
    border-radius: 50%;
}

.feature-list-highlight li::before {
    background: var(--accent-color);
}

/* --- 界面预览区域 --- */
.preview {
    padding: 160px 0;
    background: var(--bg-section-alt);
}

.preview-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
}

.preview-tab {
    padding: 12px 28px;
    border: 1px solid var(--card-border);
    background: transparent;
    border-radius: var(--radius-pill);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

.preview-tab:hover {
    background: var(--card-bg);
    color: var(--text-main);
}

.preview-tab.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.preview-panel {
    display: none;
    animation: fadeIn 0.4s ease;
}

.preview-panel.active {
    display: block;
}

.preview-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    max-width: 900px;
    margin: 0 auto;
}

.preview-image-wrapper {
    padding: 24px 24px 0;
}

.preview-image-wrapper img {
    width: 100%;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    min-height: 400px;
    object-fit: cover;
}

.preview-info {
    padding: 24px 32px;
    background: white;
}

.preview-info h3 {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-main);
    letter-spacing: -0.5px;
}

.preview-info p {
    font-size: 15px;
    color: var(--text-light);
}

/* --- 使用教程区域 --- */
.tutorial {
    padding: 160px 0;
}

.tutorial-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.tutorial-timeline::before {
    content: '';
    position: absolute;
    left: 28px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--card-border);
}

.tutorial-step {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
    position: relative;
}

.step-number {
    width: 56px;
    height: 56px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    z-index: 1;
}

.step-number span {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 600;
    color: white;
}

.step-content {
    flex: 1;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 28px;
}

.step-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.step-header h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: -0.3px;
}

.step-time {
    font-size: 12px;
    color: var(--text-muted);
    background: var(--primary-light);
    padding: 4px 14px;
    border-radius: var(--radius-pill);
    letter-spacing: 0.3px;
}

.platform-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.platform-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-body);
    border-radius: var(--radius-md);
    border: 1px solid var(--card-border);
}

.platform-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.platform-icon svg {
    width: 24px;
    height: 24px;
}

.platform-icon.windows {
    background: var(--primary);
    color: white;
}

.platform-icon.mac {
    background: var(--primary);
    color: white;
}

.platform-info h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 4px;
}

.platform-info p {
    font-size: 13px;
    color: var(--text-light);
}

.step-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.step-list li {
    display: flex;
    gap: 12px;
}

.list-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-light);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.list-content strong {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 4px;
}

.list-content p {
    font-size: 14px;
    color: var(--text-light);
}

.list-content code {
    background: var(--primary-light);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--primary);
}

/* --- 为什么选择区域 --- */
.why-choose {
    padding: 160px 0;
    background: var(--bg-section-alt);
}

.why-choose-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.why-choose-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.why-description {
    font-size: 17px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 32px;
}

.why-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.why-feature {
    display: flex;
    align-items: center;
    gap: 16px;
}

.why-feature-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.why-feature-text strong {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 2px;
}

.why-feature-text span {
    font-size: 14px;
    color: var(--text-light);
}

.stats-card {
    display: flex;
    justify-content: center;
}

.stats-ring {
    position: relative;
    width: 200px;
    height: 200px;
}

.stats-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.stats-center {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.stats-percent {
    font-family: var(--font-heading);
    font-size: 52px;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -2px;
}

.stats-label {
    font-size: 14px;
    color: var(--text-muted);
}

/* --- 下载区域 --- */
.download {
    padding: 160px 0;
}

.download-card {
    position: relative;
    background: var(--primary);
    border-radius: var(--radius-xl);
    padding: 100px 40px;
    text-align: center;
    overflow: hidden;
}

.download-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.2) 0%, transparent 60%);
    pointer-events: none;
}

.download-content {
    position: relative;
    z-index: 1;
}

.download-content h2 {
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
    letter-spacing: -1.5px;
}

.download-content>p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 32px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 36px;
    background: white;
    border-radius: var(--radius-pill);
    transition: all 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.download-btn svg {
    width: 32px;
    height: 32px;
}

.download-btn-windows svg {
    color: var(--text-main);
}

.download-btn-mac svg {
    color: var(--text-main);
}

.download-btn-text {
    text-align: left;
}

.download-label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
}

.download-os {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
}

.download-note {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 999px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
}

.download-note svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* --- 页脚 --- */
.footer {
    background: var(--primary);
    color: rgba(255, 255, 255, 0.7);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px 32px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 600;
    color: white;
    margin-bottom: 12px;
}

.footer-logo .logo-icon {
    width: 32px;
    height: 32px;
}

.footer-logo .logo-icon svg {
    width: 18px;
    height: 18px;
}

.footer-tagline {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 13px;
    font-weight: 600;
    color: white;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-column a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

/* --- 动画 --- */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- 响应式设计 --- */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .hero-description {
        margin: 0 auto 32px;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

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

    .feature-card-large {
        grid-column: span 2;
    }

    .why-choose-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .why-choose-content {
        text-align: center;
    }

    .why-choose-content .section-title {
        text-align: center;
    }

    .why-features {
        align-items: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: clamp(28px, 8vw, 40px);
        letter-spacing: -0.5px;
    }

    .hero-description {
        font-size: 16px;
    }

    /* 移动端统计数字区域适配 */
    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
        justify-content: center;
    }

    .stat-item {
        min-width: 80px;
    }

    .stat-number {
        font-size: 24px;
    }

    .stat-label {
        font-size: 12px;
    }

    .stat-divider {
        height: 30px;
    }

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

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

    .feature-card-large {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }

    .platform-cards {
        grid-template-columns: 1fr;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

/* --- 联系我们区域 --- */
.contact {
    padding: 160px 0;
    background: var(--bg-section-alt);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: var(--primary);
    color: white;
}

.contact-card h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
}

.contact-number {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-main);
    font-family: var(--font-heading);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.contact-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
}

.contact-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 8px;
}

.contact-number {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    font-family: monospace;
    margin-bottom: 8px;
}

.contact-desc {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 0;
}

.contact-qr {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 8px;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    width: fit-content;
    margin: 0 auto;
}

.contact-qr img {
    display: block;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}