/* ===== 基础设置 ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --accent: #06b6d4;
    --accent-light: #22d3ee;
    --bg-dark: #0a0f1e;
    --bg-section: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --gradient-1: linear-gradient(135deg, #2563eb, #06b6d4);
    --gradient-2: linear-gradient(135deg, #1d4ed8, #0891b2);
    --gradient-hero: linear-gradient(180deg, #0a0f1e 0%, #1e3a5f 50%, #0a0f1e 100%);
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.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(10, 15, 30, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 15, 30, 0.95);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.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: 8px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-sub {
    font-size: 13px;
    color: var(--text-secondary);
    margin-left: 4px;
}

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

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

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

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

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

.nav-btn {
    background: var(--gradient-1);
    color: var(--text-primary) !important;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 600 !important;
}

.nav-btn::after {
    display: none;
}

.nav-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 10px;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(37, 99, 235, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-outline:hover {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 14px 40px;
    font-size: 16px;
}

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 60px;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-bg-effects {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
}

.hero-orb-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: 10%;
    left: 10%;
    animation: float 8s ease-in-out infinite;
}

.hero-orb-2 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    bottom: 20%;
    right: 10%;
    animation: float 10s ease-in-out infinite reverse;
}

.hero-orb-3 {
    width: 200px;
    height: 200px;
    background: #8b5cf6;
    top: 50%;
    left: 50%;
    animation: float 6s ease-in-out infinite;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 24px;
    background: rgba(37, 99, 235, 0.15);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: 30px;
    font-size: 14px;
    color: var(--accent-light);
    margin-bottom: 24px;
}

.hero-title {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 24px;
}

.title-line {
    display: block;
}

.title-line.accent {
    color: var(--accent-light);
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-desc strong {
    color: var(--text-primary);
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.tag {
    padding: 6px 16px;
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 60px;
    position: relative;
    z-index: 1;
}

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

.stat-num {
    font-size: 36px;
    font-weight: 900;
    color: var(--accent-light);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ===== Section 通用 ===== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 6px;
    font-size: 12px;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
}

/* ===== 关于我们 ===== */
.about {
    background: var(--bg-section);
}

.about-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

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

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    opacity: 0;
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-4px);
    border-color: rgba(37, 99, 235, 0.3);
}

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

.card-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.about-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.about-card p strong {
    color: var(--accent-light);
}

/* ===== 破局之道 ===== */
.breakthrough {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    margin-bottom: 80px;
}

.breakthrough-title {
    font-size: 22px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
    color: var(--text-primary);
}

.breakthrough-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.flow-step {
    flex: 1;
    background: rgba(10, 15, 30, 0.5);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.flow-step:hover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.flow-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.flow-step h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.flow-step p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.flow-label {
    display: inline-block;
    margin-top: 12px;
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 6px;
    font-size: 12px;
    color: var(--accent);
}

.flow-arrow {
    font-size: 24px;
    color: var(--primary);
    font-weight: 700;
}

/* ===== 对比区域 ===== */
.contrast-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.contrast-col {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
}

.contrast-problems {
    border-color: rgba(239, 68, 68, 0.2);
}

.contrast-values {
    border-color: rgba(6, 182, 212, 0.2);
}

.contrast-heading {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 24px;
}

.contrast-problems .contrast-heading {
    color: #ef4444;
}

.contrast-values .contrast-heading {
    color: var(--accent-light);
}

.contrast-item {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.contrast-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.contrast-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.contrast-item p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== 核心技术 ===== */
.technology {
    background: var(--bg-dark);
}

.tech-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 60px;
}

.tech-layer {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 32px;
    transition: var(--transition);
}

.tech-layer:hover {
    border-color: var(--primary);
    transform: translateX(8px);
}

.layer-number {
    font-size: 28px;
    font-weight: 900;
    color: var(--primary);
    opacity: 0.6;
    min-width: 48px;
}

.layer-content h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.tech-layer-1 { border-left: 4px solid var(--primary); }
.tech-layer-2 { border-left: 4px solid var(--accent); }
.tech-layer-3 { border-left: 4px solid #8b5cf6; }
.tech-layer-4 { border-left: 4px solid #f59e0b; }

/* ===== 技术优势与应用价值 ===== */
.tech-benefits {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 60px;
}

.benefit-group {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.benefit-group h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 24px;
}

.benefit-item {
    margin-bottom: 20px;
}

.benefit-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.benefit-item p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== 智能体引擎 ===== */
.agent-engines {
    margin-bottom: 60px;
}

.engines-title {
    font-size: 22px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
}

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

.engine-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
}

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

.engine-openclaw { border-color: rgba(37, 99, 235, 0.3); }
.engine-openclaw:hover { border-color: var(--primary); }

.engine-hermes { border-color: rgba(139, 92, 246, 0.3); }
.engine-hermes:hover { border-color: #8b5cf6; }

.engine-match { border-color: rgba(6, 182, 212, 0.3); }
.engine-match:hover { border-color: var(--accent); }

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

.engine-icon {
    font-size: 28px;
}

.engine-header h4 {
    font-size: 17px;
    font-weight: 700;
}

.engine-badge {
    display: inline-block;
    padding: 3px 10px;
    font-size: 12px;
    border-radius: 6px;
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent);
}

.engine-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.engine-card p strong {
    color: var(--text-primary);
}

.engine-feature {
    font-size: 13px;
    color: var(--text-muted);
    padding: 12px;
    background: rgba(10, 15, 30, 0.5);
    border-radius: 8px;
    margin-top: 8px;
}

/* ===== 双卡片 ===== */
.tech-dual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.dual-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.dual-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
}

.dual-model { border-color: rgba(37, 99, 235, 0.3); }
.dual-channel { border-color: rgba(139, 92, 246, 0.3); }

.dual-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.dual-item {
    display: flex;
    gap: 16px;
}

.dual-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.dual-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.dual-item p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== 行业洞察 ===== */
.insights {
    background: var(--bg-section);
}

.insight-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 10px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    border-color: var(--primary);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
}

.insight-panel {
    display: none;
}

.insight-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.pain-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.pain-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: var(--transition);
}

.pain-card:hover {
    border-color: rgba(239, 68, 68, 0.3);
    transform: translateY(-2px);
}

.pain-icon {
    font-size: 32px;
    margin-bottom: 16px;
}

.pain-card h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
}

.pain-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== 行业应用 ===== */
.applications {
    background: var(--bg-dark);
}

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

.app-block-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
}

.app-icon {
    font-size: 28px;
}

.app-block-header h3 {
    font-size: 22px;
    font-weight: 700;
}

.app-solutions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.app-solution {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: var(--transition);
}

.app-solution:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.app-solution h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.app-solution p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.app-results {
    display: flex;
    gap: 24px;
}

.result {
    display: flex;
    flex-direction: column;
}

.result-num {
    font-size: 24px;
    font-weight: 900;
    color: var(--accent-light);
}

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

/* ===== 核心优势 ===== */
.advantages {
    background: var(--bg-section);
}

.adv-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 60px;
}

.adv-card-main {
    grid-row: span 2;
}

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

.adv-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.adv-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.adv-card-icon {
    font-size: 36px;
    margin-bottom: 20px;
}

.adv-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.adv-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.adv-card p strong {
    color: var(--accent-light);
}

.adv-badge {
    display: inline-block;
    margin-top: 16px;
    padding: 6px 16px;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
}

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

.adv-value {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.adv-value:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.adv-value-icon {
    font-size: 32px;
    margin-bottom: 16px;
}

.adv-value h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
}

.adv-value p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== 联系我们 ===== */
.contact {
    background: var(--bg-dark);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: start;
}

.contact-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 15px;
    color: var(--text-primary);
}

.contact-cta {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-cta h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.contact-cta > p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.cta-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.cta-input {
    padding: 12px 16px;
    background: rgba(10, 15, 30, 0.6);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.cta-input:focus {
    border-color: var(--primary);
}

.cta-input::placeholder {
    color: var(--text-muted);
}

.cta-select {
    appearance: none;
    cursor: pointer;
}

.cta-form .btn {
    grid-column: span 2;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-section);
    border-top: 1px solid var(--border);
    padding: 60px 0 24px;
}

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

.footer-brand .logo-icon {
    width: 30px;
    height: 30px;
}

.footer-brand .logo-text {
    font-size: 18px;
    font-weight: 700;
}

.footer-brand .logo-sub {
    font-size: 12px;
}

.footer-brand p {
    margin-top: 16px;
    font-size: 14px;
    color: var(--text-muted);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 8px;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}

.footer-bottom a:hover {
    color: var(--text-primary);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .about-cards {
        grid-template-columns: 1fr;
    }

    .breakthrough-flow {
        flex-direction: column;
        gap: 16px;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

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

    .tech-benefits {
        grid-template-columns: 1fr;
    }

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

    .tech-dual {
        grid-template-columns: 1fr;
    }

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

    .adv-grid .adv-card-main {
        grid-row: span 1;
    }

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

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(10, 15, 30, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-toggle {
        display: flex;
    }

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

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

    .hero-stats {
        gap: 30px;
        flex-wrap: wrap;
    }

    .stat-num {
        font-size: 28px;
    }

    section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 24px;
    }

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

    .app-solutions {
        grid-template-columns: 1fr;
    }

    .adv-values {
        grid-template-columns: 1fr;
    }

    .cta-form {
        grid-template-columns: 1fr;
    }

    .cta-form .btn {
        grid-column: span 1;
    }

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

    .insight-tabs {
        flex-wrap: wrap;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 26px;
    }

    .hero-tags {
        flex-direction: column;
        align-items: center;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .breakthrough {
        padding: 32px 20px;
    }

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