/* ===== 全局样式 ===== */
:root {
    /* 主色调 - 高级暖杏色（更柔和高级） */
    --primary: #c28b6e;
    --primary-light: #d4a68a;
    --primary-dark: #a87356;
    --primary-glow: rgba(194, 139, 110, 0.12);
    
    /* 辅助色 - 暖灰蓝 */
    --secondary: #a8bcc9;
    --accent: #6b9b7e;
    
    /* 背景色 - 暖白（更柔和） */
    --bg: #f5f0ea;
    --bg-card: rgba(255, 255, 255, 0.75);
    --bg-card-solid: #fcfaf7;
    
    /* 文字色 - 深暖灰 */
    --text: #2c2824;
    --text-light: #7a7268;
    --text-muted: #a69c90;
    
    /* 边框和阴影 - 更柔和 */
    --border: rgba(120, 100, 85, 0.10);
    --shadow-sm: 0 1px 3px rgba(120, 100, 85, 0.04);
    --shadow: 0 4px 24px rgba(120, 100, 85, 0.06);
    --shadow-lg: 0 12px 48px rgba(120, 100, 85, 0.08);
    --shadow-xl: 0 24px 64px rgba(120, 100, 85, 0.12);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    --font-serif: 'Georgia', 'Noto Serif SC', serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== 背景纹理 - 更柔和高级 ===== */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 70% 55% at 15% 20%, rgba(255, 242, 234, 0.85) 0%, transparent 60%),
        radial-gradient(ellipse 50% 45% at 85% 25%, rgba(237, 218, 206, 0.25) 0%, transparent 60%),
        radial-gradient(ellipse 60% 35% at 50% 100%, rgba(235, 225, 215, 0.5) 0%, transparent 70%);
    pointer-events: none;
    z-index: -2;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(120, 100, 85, 0.022) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120, 100, 85, 0.022) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(245, 240, 234, 0.82);
    backdrop-filter: blur(20px) saturate(1.2);
    -webkit-backdrop-filter: blur(20px) saturate(1.2);
    border-bottom: 1px solid var(--border);
    transition: box-shadow 0.3s;
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    text-decoration: none;
    color: var(--text);
}

.brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    box-shadow: 0 2px 8px var(--primary-glow);
}

.brand-text {
    letter-spacing: -0.3px;
}

.brand-beta {
    font-size: 10px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(194, 139, 110, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
    transition: width 0.3s;
}

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text);
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}

.mobile-menu-btn:hover {
    background: var(--border);
}

/* ===== 促销横幅 ===== */
.promo-banner {
    background: linear-gradient(135deg, rgba(194, 139, 110, 0.06), rgba(168, 188, 201, 0.06));
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    text-align: center;
    margin-top: 68px;
}

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

.promo-banner a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.promo-banner a:hover {
    text-decoration: underline;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    letter-spacing: 0.2px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(194, 139, 110, 0.25);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(194, 139, 110, 0.04);
}

.btn-ghost {
    background: transparent;
    color: var(--text-light);
    border: none;
}

.btn-ghost:hover {
    color: var(--text);
    background: rgba(120, 100, 85, 0.06);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 15px;
    border-radius: 14px;
}

.btn-block {
    width: 100%;
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 68px;
}

#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.8;
}


.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(194, 139, 110, 0.08);
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 24px;
    letter-spacing: 0.3px;
}

.hero-eyebrow .dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero h1 {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 40%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 40px;
    line-height: 1.8;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 64px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    max-width: 800px;
}

.stat-item {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 20px 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: rgba(194, 139, 110, 0.2);
}

.stat-number {
    display: block;
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== 通用 Section ===== */
section {
    padding: 120px 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 64px;
}

.section-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.section-desc {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== 功能特性 ===== */
.features {
    background: var(--bg-card-solid);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    padding: 32px;
    border-radius: var(--radius-lg);
    background: var(--bg);
    border: 1px solid var(--border);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    opacity: 0;
    transition: opacity 0.3s;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(194, 139, 110, 0.15);
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(194, 139, 110, 0.1), rgba(194, 139, 110, 0.05));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 20px;
    transition: transform 0.3s;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.2px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== 使用流程 - 横向步骤卡片 ===== */
.how-it-works {
    position: relative;
}

.steps-horizontal {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 0;
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.step-card {
    flex: 1;
    text-align: center;
    position: relative;
    padding: 0 24px;
}

.step-card-number {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
}

.step-card-number span {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px var(--primary-glow);
    position: relative;
    z-index: 2;
}

.step-connector {
    position: absolute;
    top: 50%;
    left: calc(50% + 32px);
    width: calc(100% - 28px);
    height: 2px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary));
    opacity: 0.25;
    transform: translateY(-50%);
    z-index: 1;
}

.step-card:last-child .step-connector {
    display: none;
}

.step-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(194, 139, 110, 0.08), rgba(194, 139, 110, 0.03));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin: 0 auto 20px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.step-card:hover .step-card-icon {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(194, 139, 110, 0.12);
}

.step-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.2px;
}

.step-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    max-width: 240px;
    margin: 0 auto;
}

/* ===== 价格 ===== */
.pricing {
    background: var(--bg-card-solid);
    position: relative;
}

.pricing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    padding: 32px 28px;
    border-radius: var(--radius-lg);
    background: var(--bg);
    text-align: center;
    position: relative;
    border: 1px solid var(--border);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.pricing-card.featured {
    border-color: var(--primary);
    background: var(--bg-card-solid);
    box-shadow: 0 8px 32px var(--primary-glow);
}

.pricing-card.featured:hover {
    transform: translateY(-4px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 4px 20px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
    white-space: nowrap;
}

.pricing-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(194, 139, 110, 0.08), rgba(194, 139, 110, 0.03));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin: 0 auto 16px;
    transition: transform 0.3s;
}

.pricing-card:hover .pricing-icon {
    transform: scale(1.1);
}

.pricing-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}

.pricing-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.price {
    margin-bottom: 24px;
}

.price .amount {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary-dark);
    letter-spacing: -2px;
}

.price .period {
    font-size: 14px;
    color: var(--text-light);
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 28px;
}

.pricing-features li {
    padding: 8px 0;
    font-size: 13px;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li .check {
    color: var(--accent);
    font-weight: 700;
}

/* ===== 常见问题 ===== */
.faq {
    position: relative;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: border-color 0.3s;
}

.faq-item:hover {
    border-color: rgba(194, 139, 110, 0.15);
}

.faq-item.active {
    border-color: rgba(194, 139, 110, 0.3);
}

.faq-question {
    padding: 20px 24px;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 15px;
}

.faq-question:hover {
    background: rgba(194, 139, 110, 0.03);
}

.faq-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(194, 139, 110, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--primary);
    transition: transform 0.3s;
    flex-shrink: 0;
}

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

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    padding: 0 24px 24px;
    max-height: 400px;
}

/* ===== CTA 区域 ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
}

.cta-section .container {
    position: relative;
    z-index: 1;
}

.cta-section h2 {
    font-size: 40px;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.cta-section p {
    font-size: 18px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 36px;
}

.cta-section .btn {
    background: white;
    color: var(--primary-dark);
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

.cta-section .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--text);
    color: white;
    padding: 80px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand-section .brand-icon {
    margin-bottom: 16px;
}

.footer-brand-section .brand-text {
    color: white;
    font-size: 18px;
}

.footer-brand-section p {
    color: rgba(255,255,255,0.5);
    font-size: 14px;
    line-height: 1.7;
    margin-top: 12px;
    max-width: 280px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: rgba(255,255,255,0.9);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.footer-col a {
    display: block;
    color: rgba(255,255,255,0.5);
    text-decoration: none;
    font-size: 14px;
    padding: 6px 0;
    transition: color 0.2s;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.footer-bottom p {
    color: rgba(255,255,255,0.35);
    font-size: 13px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    color: rgba(255,255,255,0.35);
    text-decoration: none;
    font-size: 18px;
    transition: color 0.2s;
}

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

/* ===== 滚动动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* ===== 响应式 - 全面移动端适配 ===== */

/* 平板竖屏 / 小屏幕笔记本 */
@media (max-width: 1024px) {
    .hero h1 { font-size: 48px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
    .pricing-card.featured { transform: none; }
    .pricing-card.featured:hover { transform: translateY(-4px); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* 手机横屏 / 小平板 */
@media (max-width: 860px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: rgba(247, 244, 237, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px;
        border-bottom: 1px solid var(--border);
        gap: 16px;
        align-items: stretch;
    }
    
    .nav-links.active a {
        padding: 10px 16px;
        border-radius: var(--radius-sm);
    }
    
    .nav-links.active a:hover {
        background: rgba(194, 139, 110, 0.05);
    }
    
    .hero { min-height: auto; padding: 100px 0 80px; }
    .hero h1 { font-size: 36px; }
    .hero-subtitle { font-size: 16px; margin-bottom: 32px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .stat-item { padding: 16px 12px; }
    .stat-number { font-size: 14px; }
    .stat-label { font-size: 12px; }
    
    .steps-horizontal { flex-direction: column; align-items: center; }
    .step-connector { display: none; }
    .step-card { max-width: 320px; padding: 0; margin-bottom: 32px; }
    .step-card:last-child { margin-bottom: 0; }
    
    .section-title { font-size: 32px; }
    .section-desc { font-size: 15px; }
    .cta-section h2 { font-size: 32px; }
    .cta-section p { font-size: 16px; }
    
    .feature-card { padding: 28px 24px; }
    .pricing-card { padding: 28px 24px; }
    
    .faq-question { padding: 16px 20px; font-size: 14px; }
    .faq-answer { font-size: 13px; }
    .faq-item.active .faq-answer { padding: 0 20px 20px; }
}

/* 手机竖屏 */
@media (max-width: 640px) {
    .container { padding: 0 16px; }
    section { padding: 64px 0; }
    
    .navbar .container { height: 60px; }
    .nav-brand { font-size: 17px; gap: 8px; }
    .brand-icon { width: 30px; height: 30px; font-size: 15px; border-radius: 8px; }
    .brand-beta { font-size: 9px; padding: 1px 6px; }
    .promo-banner { margin-top: 60px; }
    .promo-banner p { font-size: 12px; }
    
    .hero { padding: 80px 0 60px; }
    .hero h1 { font-size: 28px; letter-spacing: -0.5px; }
    .hero-eyebrow { font-size: 12px; padding: 4px 12px; margin-bottom: 16px; }
    .hero-subtitle { font-size: 15px; margin-bottom: 28px; }
    .hero-actions { gap: 10px; margin-bottom: 40px; }
    .hero-actions .btn { font-size: 14px; padding: 12px 24px; }
    .hero-stats { grid-template-columns: 1fr 1fr; gap: 10px; }
    .stat-item { padding: 14px 12px; }
    .stat-number { font-size: 14px; }
    .stat-label { font-size: 12px; }
    
    .section-header { margin-bottom: 32px; }
    .section-eyebrow { font-size: 11px; margin-bottom: 8px; }
    .section-title { font-size: 26px; margin-bottom: 12px; }
    .section-desc { font-size: 14px; }
    
    .features-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .feature-card { padding: 20px 16px; }
    .feature-card .feature-icon { width: 40px; height: 40px; font-size: 18px; margin-bottom: 14px; }
    .feature-card h3 { font-size: 16px; margin-bottom: 8px; }
    .feature-card p { font-size: 13px; }
    
    .step-card { max-width: 100%; padding: 0 16px; margin-bottom: 28px; }
    .step-card-number span { width: 44px; height: 44px; font-size: 16px; }
    .step-card-icon { width: 44px; height: 44px; font-size: 20px; margin-bottom: 16px; }
    .step-card h3 { font-size: 16px; }
    .step-card p { font-size: 13px; max-width: 100%; }
    
    .pricing-grid { max-width: 100%; gap: 16px; }
    .pricing-card { padding: 24px 20px; }
    .pricing-icon { width: 40px; height: 40px; font-size: 18px; }
    .pricing-card h3 { font-size: 16px; }
    .price .amount { font-size: 32px; }
    .pricing-features li { font-size: 12px; padding: 6px 0; }
    
    .faq-list { max-width: 100%; }
    .faq-question { padding: 14px 16px; font-size: 14px; }
    .faq-answer { font-size: 13px; }
    .faq-item.active .faq-answer { padding: 0 16px 16px; }
    
    .cta-section { padding: 64px 0; }
    .cta-section h2 { font-size: 26px; }
    .cta-section p { font-size: 15px; margin-bottom: 28px; }
    .cta-section .btn { font-size: 14px; padding: 12px 28px; }
    
    .footer { padding: 48px 0 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-brand-section .brand-text { font-size: 16px; }
    .footer-brand-section p { font-size: 13px; max-width: 100%; }
    .footer-col h4 { font-size: 13px; margin-bottom: 14px; }
    .footer-col a { font-size: 13px; padding: 4px 0; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; padding-top: 24px; }
    .footer-bottom p { font-size: 12px; }
    
    /* 移动端粒子效果 */
    #particleCanvas { opacity: 0.6; }

}

/* 超小屏手机 */
@media (max-width: 380px) {
    .container { padding: 0 12px; }
    section { padding: 48px 0; }
    .hero h1 { font-size: 24px; }
    .hero-stats { grid-template-columns: 1fr; }
    .section-title { font-size: 22px; }
    .price .amount { font-size: 28px; }
}

/* ===== 新手引导教程样式 ===== */
.guide-step-card {
    padding: 18px;
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
    border: 1px solid var(--line, rgba(120, 100, 85, 0.10));
    border-left: 4px solid var(--primary);
    margin-bottom: 16px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.guide-step-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.guide-step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}
.guide-tip-box {
    background: rgba(194, 139, 110, 0.06);
    border-radius: 14px;
    padding: 14px;
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.7;
    border: 1px solid rgba(194, 139, 110, 0.1);
}
.guide-faq-box {
    background: rgba(47, 143, 99, 0.04);
    border-radius: 14px;
    padding: 16px;
    border: 1px solid rgba(47, 143, 99, 0.15);
    font-size: 13px;
    color: var(--text-light);
    line-height: 2;
}
.guide-faq-box p {
    margin-bottom: 4px;
}
.guide-faq-box p:last-child {
    margin-bottom: 0;
}
.guide-faq-box strong {
    color: var(--text);
}

/* ===== 设置向导步骤卡片 ===== */
.setup-step-card {
    background: rgba(255,255,255,0.7);
    border-radius: 24px;
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    border: 1px solid var(--line, rgba(120, 100, 85, 0.10));
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.setup-step-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 24px 52px rgba(68, 53, 35, 0.12);
}
.setup-step-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
}
.setup-step-header h3 {
    margin: 0;
    font-size: 18px;
    letter-spacing: -0.03em;
}
.setup-step-body p {
    margin: 0;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}
.setup-step-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 8px;
}

/* ===== 字段提示样式 ===== */
.field-hint {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
    line-height: 1.5;
}
.field-hint .emoji {
    margin-right: 2px;
}

/* ===== 注册引导卡片 ===== */
.register-guide-card {
    background: linear-gradient(135deg, rgba(194, 139, 110, 0.06), rgba(168, 188, 201, 0.06));
    border-radius: 14px;
    padding: 16px;
    margin-bottom: 24px;
    border: 1px solid rgba(194, 139, 110, 0.15);
}
.register-guide-content {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: #5c4033;
    line-height: 1.7;
}
.register-guide-content strong {
    color: #2c1810;
}

/* ===== 配置教程步骤 ===== */
.tutorial-step {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 16px;
}
.tutorial-step:last-child {
    margin-bottom: 0;
}
.tutorial-step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}
.tutorial-step-body strong {
    font-size: 15px;
    color: var(--text);
}
.tutorial-step-body p {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 4px;
    line-height: 1.6;
}
.tutorial-tip-box {
    background: #faf8f6;
    border-radius: 10px;
    padding: 12px;
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.7;
    border: 1px dashed rgba(120, 100, 85, 0.15);
}

/* ===== 键盘按键样式 ===== */
kbd {
    background: #f0e8de;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    border: 1px solid #e0d5c8;
    font-family: inherit;
}

/* ===== 返回顶部按钮 ===== */

.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 999;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px var(--primary-glow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(194, 139, 110, 0.35);
}

.back-to-top:active {
    transform: translateY(0);
}

/* 移动端返回顶部按钮 */
@media (max-width: 640px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

/* ===== 公告弹窗 - 玻璃拟态 ===== */
.announcement-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(8px) saturate(1.2);
    -webkit-backdrop-filter: blur(8px) saturate(1.2);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: overlayFadeIn 0.35s ease;
}

@keyframes overlayFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.announcement-modal {
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    border-radius: 28px;
    box-shadow: 
        0 32px 80px rgba(0, 0, 0, 0.12),
        0 8px 32px rgba(0, 0, 0, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
    width: 90%;
    max-width: 520px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    animation: modalSlideIn 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.94);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.announcement-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px 28px 16px;
    border-bottom: 1px solid rgba(120, 100, 85, 0.08);
}

.announcement-header .announcement-icon {
    font-size: 24px;
    line-height: 1;
    filter: drop-shadow(0 2px 4px rgba(194, 139, 110, 0.2));
}

.announcement-header h3 {
    flex: 1;
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin: 0;
    letter-spacing: -0.3px;
}

.announcement-close {
    width: 34px;
    height: 34px;
    border: none;
    background: rgba(120, 100, 85, 0.08);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    line-height: 1;
}

.announcement-close:hover {
    background: rgba(120, 100, 85, 0.15);
    color: var(--text);
    transform: rotate(90deg);
}

.announcement-body {
    padding: 20px 28px;
    overflow-y: auto;
    flex: 1;
    line-height: 1.8;
    color: var(--text);
    font-size: 15px;
}

.announcement-body p {
    margin-bottom: 14px;
}

.announcement-body p:last-child {
    margin-bottom: 0;
}

.announcement-footer {
    padding: 16px 28px 24px;
    border-top: 1px solid rgba(120, 100, 85, 0.08);
}

.announcement-footer .btn {
    width: 100%;
    border-radius: 14px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 16px var(--primary-glow);
    border: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.announcement-footer .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(194, 139, 110, 0.3);
}

.announcement-footer .btn:active {
    transform: translateY(0);
}

/* 移动端适配 */
@media (max-width: 640px) {
    .announcement-modal {
        width: 90%;
        max-height: 70vh;
        border-radius: 22px;
    }

    .announcement-header {
        padding: 18px 20px 14px;
    }

    .announcement-header h3 {
        font-size: 16px;
    }

    .announcement-body {
        padding: 16px 20px;
        font-size: 14px;
    }

    .announcement-footer {
        padding: 14px 20px 20px;
    }

    .announcement-footer .btn {
        font-size: 14px;
        padding: 11px 20px;
    }
}