:root {
    /* 品牌色系 - 温润克制 */
    --color-bg-primary: #FAF8F5;
    --color-bg-secondary: #F5F0EB;
    --color-bg-card: rgba(255, 255, 255, 0.72);
    --color-bg-glass: rgba(255, 255, 255, 0.45);

    --color-text-primary: #2C2416;
    --color-text-secondary: #6B5D4D;
    --color-text-muted: #9A8B7A;

    --color-accent-gold: #C9A962;
    --color-accent-green: #6B8E6B;
    --color-accent-warm: #D4A574;

    --color-border: rgba(201, 169, 98, 0.2);
    --color-shadow: rgba(44, 36, 22, 0.08);

    --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;

    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* 背景渐变装饰 */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    background: 
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(201, 169, 98, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(107, 142, 107, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 100% 80% at 50% 100%, rgba(212, 165, 116, 0.05) 0%, transparent 50%);
}

/* 导航 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 40px;
    background: rgba(250, 248, 245, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    padding: 12px 40px;
    background: rgba(250, 248, 245, 0.95);
}

.navbar-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-warm));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    font-size: 18px;
    box-shadow: 0 4px 20px rgba(201, 169, 98, 0.3);
}

.brand-text {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 2px;
    font-family: var(--font-display);
}

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition-smooth);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-gold);
    transition: var(--transition-smooth);
}

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

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

/* 按钮系统 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-bounce);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-warm));
    color: white;
    box-shadow: 0 4px 20px rgba(201, 169, 98, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(201, 169, 98, 0.4);
}

.btn-secondary {
    background: var(--color-bg-card);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--color-shadow);
}

/* 通用区块 */
.section {
    padding: 120px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    display: inline-block;
    padding: 8px 20px;
    background: var(--color-bg-secondary);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-accent-gold);
    letter-spacing: 1px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.section-title {
    font-size: 48px;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 20px;
    font-family: var(--font-display);
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Hero 首屏 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 140px 40px 80px;
    max-width: 1400px;
    margin: 0 auto;
    gap: 60px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-badges {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.badge {
    padding: 8px 16px;
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 56px;
    font-weight: 600;
    line-height: 1.15;
    margin-bottom: 24px;
    font-family: var(--font-display);
    letter-spacing: -1px;
}

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

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    flex: 1;
    position: relative;
    height: 600px;
    perspective: 1000px;
}

/* 悬浮卡片组 */
.floating-cards {
    position: relative;
    width: 100%;
    height: 100%;
}

.float-card {
    position: absolute;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    backdrop-filter: blur(20px);
    box-shadow: 
        0 20px 60px var(--color-shadow),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    transition: var(--transition-bounce);
    animation: float 6s ease-in-out infinite;
}

.float-card:nth-child(1) {
    width: 280px;
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.float-card:nth-child(2) {
    width: 240px;
    top: 5%;
    right: 10%;
    animation-delay: -1.5s;
}

.float-card:nth-child(3) {
    width: 260px;
    top: 45%;
    left: 0;
    animation-delay: -3s;
}

.float-card:nth-child(4) {
    width: 220px;
    top: 40%;
    right: 5%;
    animation-delay: -4.5s;
}

.float-card:nth-child(5) {
    width: 200px;
    bottom: 15%;
    left: 20%;
    animation-delay: -2s;
}

.float-card:nth-child(6) {
    width: 180px;
    bottom: 10%;
    right: 15%;
    animation-delay: -5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotateX(5deg) rotateY(-5deg); }
    50% { transform: translateY(-20px) rotateX(5deg) rotateY(-5deg); }
}

.float-card:hover {
    transform: translateY(-10px) scale(1.02);
    z-index: 10;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.card-icon.ai { background: linear-gradient(135deg, #E8D5C4, #D4A574); }
.card-icon.device { background: linear-gradient(135deg, #C4D4E8, #6B8E6B); }
.card-icon.personal { background: linear-gradient(135deg, #E8C4D4, #C9A962); }
.card-icon.voice { background: linear-gradient(135deg, #D4E8C4, #6B8E6B); }
.card-icon.privacy { background: linear-gradient(135deg, #C4E8E8, #6B8E8E); }
.card-icon.control { background: linear-gradient(135deg, #E8E8C4, #C9A962); }

.card-title {
    font-size: 16px;
    font-weight: 600;
}

.card-desc {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.card-status {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--color-accent-green);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* 核心能力卡片 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent-gold), var(--color-accent-warm));
    transform: scaleX(0);
    transition: var(--transition-smooth);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px var(--color-shadow);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 24px;
}

.feature-card:nth-child(1) .feature-icon { background: linear-gradient(135deg, #E8D5C4, #D4A574); }
.feature-card:nth-child(2) .feature-icon { background: linear-gradient(135deg, #C4D4E8, #6B8E6B); }
.feature-card:nth-child(3) .feature-icon { background: linear-gradient(135deg, #E8C4D4, #C9A962); }
.feature-card:nth-child(4) .feature-icon { background: linear-gradient(135deg, #D4E8C4, #6B8E6B); }

.feature-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* 流程时间线 */
.process-section {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: 80px 60px;
    margin: 0 40px;
    max-width: 1320px;
}

.process-timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 15%;
    right: 15%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent-gold), var(--color-accent-green));
    opacity: 0.3;
}

.process-step {
    text-align: center;
    position: relative;
    flex: 1;
}

.step-number {
    width: 80px;
    height: 80px;
    background: white;
    border: 2px solid var(--color-accent-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-accent-gold);
    margin: 0 auto 24px;
    position: relative;
    z-index: 1;
    box-shadow: 0 10px 30px var(--color-shadow);
}

.step-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

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

/* 场景卡片 */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.scenario-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-bounce);
}

.scenario-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 60px var(--color-shadow);
}

.scenario-visual {
    height: 200px;
    background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    position: relative;
    overflow: hidden;
}

.scenario-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(201, 169, 98, 0.1) 0%, transparent 50%);
}

.scenario-content {
    padding: 32px;
}

.scenario-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}

.scenario-desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 隐私安全区 */
.privacy-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.privacy-content h2 {
    font-size: 42px;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 24px;
    font-family: var(--font-display);
}

.privacy-content p {
    font-size: 17px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.privacy-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.privacy-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    transition: var(--transition-smooth);
}

.privacy-card:hover {
    transform: translateX(8px);
    box-shadow: 0 10px 30px var(--color-shadow);
}

.privacy-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--color-accent-green), #8FBC8F);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.privacy-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.privacy-card p {
    font-size: 14px;
    color: var(--color-text-muted);
    margin: 0;
}

/* 品牌原则 */
.principles-section {
    text-align: center;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: 100px 60px;
    margin: 0 40px;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 60px;
    margin-top: 60px;
}

.principle-item {
    position: relative;
}

.principle-number {
    font-size: 72px;
    font-weight: 700;
    color: var(--color-accent-gold);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 16px;
}

.principle-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 16px;
}

.principle-desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 页脚 */
.footer {
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
    padding: 80px 40px 40px;
    margin-top: 120px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .brand-icon {
    background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-warm));
    margin-bottom: 20px;
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 14px;
    line-height: 1.7;
    max-width: 300px;
}

.footer-links h4 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 24px;
    color: var(--color-accent-gold);
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition-smooth);
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--color-text-muted);
}

/* 内页通用样式 */
.page-header {
    padding: 160px 40px 80px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.page-header h1 {
    font-size: 52px;
    font-weight: 600;
    margin-bottom: 24px;
    font-family: var(--font-display);
}

.page-header p {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 内容页面 */
.content-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 40px 120px;
}

.content-block {
    margin-bottom: 60px;
}

.content-block h2 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 24px;
    font-family: var(--font-display);
}

.content-block h3 {
    font-size: 22px;
    font-weight: 600;
    margin: 32px 0 16px;
}

.content-block p {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.content-block ul {
    margin-left: 24px;
    color: var(--color-text-secondary);
}

.content-block li {
    margin-bottom: 12px;
    line-height: 1.7;
}

/* 联系页面 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 80px;
}

.contact-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    transition: var(--transition-bounce);
}

.contact-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px var(--color-shadow);
}

.contact-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-warm));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto 24px;
}

.contact-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.contact-card p {
    font-size: 15px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.contact-card .email {
    color: var(--color-accent-gold);
    font-weight: 500;
}

/* 响应式 */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 120px;
    }

    .hero-content {
        max-width: 100%;
    }

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

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

    .hero-visual {
        height: 400px;
        width: 100%;
    }

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

    .privacy-section {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 16px 20px;
    }

    .nav-links {
        display: none;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero-title {
        font-size: 36px;
    }

    .section {
        padding: 80px 20px;
    }

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

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

    .process-timeline {
        flex-direction: column;
        gap: 40px;
    }

    .process-timeline::before {
        display: none;
    }

    .process-section,
    .principles-section {
        margin: 0 20px;
        padding: 60px 30px;
    }

    .float-card {
        position: relative;
        width: 100% !important;
        top: auto !important;
        left: auto !important;
        right: auto !important;
        bottom: auto !important;
        margin-bottom: 16px;
        animation: none;
    }

    .floating-cards {
        height: auto;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

/* 滚动显示动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 链接高亮 */
a {
    color: var(--color-accent-gold);
    text-decoration: none;
    transition: var(--transition-smooth);
}

a:hover {
    color: var(--color-accent-warm);
}