/* ========================================
   泽盛赋能 - 官网样式
   ======================================== */

/* === CSS Variables === */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #06b6d4;
    --secondary-dark: #0891b2;
    --accent: #f59e0b;
    --bg: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a2e;
    --bg-section: #0e0e16;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --border: rgba(99, 102, 241, 0.15);
    --border-light: rgba(255, 255, 255, 0.06);
    --gradient-primary: linear-gradient(135deg, #6366f1, #06b6d4);
    --gradient-hero: linear-gradient(135deg, #6366f1 0%, #8b5cf6 30%, #06b6d4 70%, #10b981 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-align: center;
    justify-content: center;
    white-space: nowrap;
}

.btn-sm { padding: 8px 20px; font-size: 0.875rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-full { width: 100%; }

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}
.btn-outline:hover {
    border-color: var(--primary-light);
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.btn-white {
    background: #fff;
    color: var(--primary-dark);
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}
.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3);
}

/* === Navbar === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-light);
    padding: 10px 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon svg {
    width: 36px;
    height: 36px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links > a,
.nav-dropdown-trigger {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 400;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    text-decoration: none;
}

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

.nav-links > a:hover,
.nav-dropdown-trigger:hover {
    color: #fff;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ★ 导航下拉菜单（AI 工具） */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-trigger svg {
    transition: transform 0.2s;
}

.nav-dropdown:hover .nav-dropdown-trigger svg {
    transform: rotate(180deg);
}

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

.nav-dropdown:hover .nav-dropdown-trigger::after {
    width: 100%;
}

.nav-dropdown-panel {
    position: absolute;
    top: calc(100% + 16px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 420px;
    background: rgba(18, 18, 26, 0.98);
    backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(99, 102, 241, 0.08);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
}

.nav-dropdown-panel::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 16px;
}

.nav-dropdown:hover .nav-dropdown-panel {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-inner {
    padding: 20px;
}

.nav-dropdown-group {
    margin-bottom: 16px;
}

.nav-dropdown-group:last-child {
    margin-bottom: 0;
}

.nav-dropdown-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    transition: var(--transition);
    text-decoration: none;
    color: var(--text);
}

.nav-dropdown-item:hover {
    background: rgba(99, 102, 241, 0.08);
}

.nav-dropdown-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.nav-dropdown-text {
    flex: 1;
    min-width: 0;
}

.nav-dropdown-name {
    display: block;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.3;
}

.nav-dropdown-desc {
    display: block;
    font-size: 0.75rem;
    color: var(--text-dim);
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-dropdown-badge {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 20px;
    flex-shrink: 0;
}

.badge-beta {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.badge-coming {
    background: rgba(100, 116, 139, 0.15);
    color: #94a3b8;
}

/* === Hero === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 120px 0 80px;
}

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

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-particles {
    position: absolute;
    inset: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 28px;
    animation: fadeInDown 0.8s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
    animation: gradientShift 4s ease infinite;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 36px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 64px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    font-family: 'Inter', sans-serif;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-top: 4px;
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    animation: bounce 2s infinite;
}

.hero-scroll a {
    color: var(--text-dim);
}

.hero-scroll a:hover {
    color: var(--primary-light);
}

/* === Sections === */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--secondary);
    margin-bottom: 12px;
    font-family: 'Inter', sans-serif;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 550px;
    margin: 0 auto;
}

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

/* ★★★ AI 工具矩阵（新增板块） ★★★ */
.ai-tools-section {
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

.ai-tools-section::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.ai-tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.ai-tool-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--text);
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

.ai-tool-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.ai-tool-glow {
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    height: 3px;
    background: linear-gradient(90deg, var(--tool-color), transparent);
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.ai-tool-card:hover {
    border-color: rgba(99, 102, 241, 0.2);
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px color-mix(in srgb, var(--tool-color) 15%, transparent);
}

.ai-tool-card:hover .ai-tool-glow {
    opacity: 1;
}

.ai-tool-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 16px;
}

.ai-tool-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: color-mix(in srgb, var(--tool-color) 12%, transparent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    transition: transform 0.3s;
}

.ai-tool-card:hover .ai-tool-icon {
    transform: scale(1.08);
}

.ai-tool-badge {
    font-size: 0.68rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    flex-shrink: 0;
}

.badge-active {
    background: rgba(16, 185, 129, 0.12);
    color: #10b981;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.badge-active-dot {
    width: 6px;
    height: 6px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.ai-tool-name {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.3;
}

.ai-tool-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.6;
    flex: 1;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ai-tool-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    border-top: 1px solid var(--border-light);
}

.ai-tool-category {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-dim);
    padding: 3px 10px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 6px;
}

.ai-tool-arrow {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    transition: all 0.3s;
}

.ai-tool-card:hover .ai-tool-arrow {
    color: var(--tool-color, var(--primary-light));
    background: color-mix(in srgb, var(--tool-color, var(--primary)) 10%, transparent);
    transform: translate(2px, -2px);
}

/* === Services === */
.services {
    background: var(--bg-section);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--border);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

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

.service-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-icon-brain {
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary-light);
}
.service-icon-brain svg { stroke: var(--primary-light); }

.service-icon-code {
    background: rgba(6, 182, 212, 0.12);
    color: var(--secondary);
}
.service-icon-code svg { stroke: var(--secondary); }

.service-icon-terminal {
    background: rgba(16, 185, 129, 0.12);
    color: #10b981;
}
.service-icon-terminal svg { stroke: #10b981; }

.service-icon-shield {
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent);
}
.service-icon-shield svg { stroke: var(--accent); }

.service-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.service-desc {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-features {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 20px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.service-features li svg {
    flex-shrink: 0;
    stroke: var(--secondary);
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--primary-light);
    font-weight: 500;
}

.service-link:hover {
    gap: 10px;
    color: #fff;
}

/* === Tech Section === */
.tech-section {
    background: var(--bg);
}

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

.tech-desc {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 36px;
}

.tech-highlights {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.tech-item-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-item-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--primary-light);
}

.tech-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.tech-item p {
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* Tech Visual */
.tech-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.tech-card-stack {
    position: relative;
    width: 100%;
    height: 400px;
}

.tech-circle-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    border: 1px solid rgba(99, 102, 241, 0.08);
}

.floating-card {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 20px 24px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    min-width: 220px;
}

.card-1 {
    top: 20px;
    left: 10%;
    animation: float1 6s ease-in-out infinite;
}

.card-2 {
    top: 50%;
    right: 5%;
    transform: translateY(-50%);
    animation: float2 5s ease-in-out infinite;
}

.card-3 {
    bottom: 20px;
    left: 20%;
    animation: float3 7s ease-in-out infinite;
}

.fc-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.fc-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.fc-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 6px;
}

.fc-bar-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    animation: barGrow 2s ease-out;
}

.fc-percent {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.fc-number {
    font-size: 1.8rem;
    font-weight: 800;
    font-family: 'Inter', sans-serif;
    color: #fff;
}

/* === Solutions === */
.solutions-section {
    background: var(--bg-section);
}

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

.solution-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.solution-card:hover {
    border-color: var(--border);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.solution-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 50px;
    background: rgba(6, 182, 212, 0.1);
    color: var(--secondary);
    border: 1px solid rgba(6, 182, 212, 0.2);
    margin-bottom: 16px;
    align-self: flex-start;
}

.solution-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.solution-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

.solution-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--primary-light);
    font-weight: 500;
}

.solution-link:hover {
    gap: 10px;
    color: #fff;
}

/* === Partners === */
.partners-section {
    background: var(--bg);
    overflow: hidden;
}

.partners-marquee {
    overflow: hidden;
    mask-image: linear-gradient(90deg, transparent, black 15%, black 85%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, black 15%, black 85%, transparent);
}

.partners-track {
    display: flex;
    gap: 40px;
    animation: marquee 20s linear infinite;
    width: max-content;
}

.partner-item {
    flex-shrink: 0;
    padding: 16px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner-item span {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dim);
    white-space: nowrap;
}

/* === News === */
.news-section {
    background: var(--bg-section);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.news-item {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 24px 32px;
    background: var(--bg-card);
    transition: var(--transition);
}

.news-item:hover {
    background: var(--bg-card-hover);
    padding-left: 40px;
}

.news-date {
    font-size: 0.85rem;
    color: var(--text-dim);
    font-family: 'Inter', sans-serif;
    white-space: nowrap;
    min-width: 100px;
}

.news-title {
    flex: 1;
    font-size: 0.95rem;
    font-weight: 500;
}

.news-item svg {
    color: var(--text-dim);
    flex-shrink: 0;
    transition: var(--transition);
}

.news-item:hover svg {
    color: var(--primary-light);
    transform: translateX(4px);
}

/* === CTA === */
.cta-section {
    background: var(--bg);
    padding: 60px 0;
}

.cta-box {
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    padding: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
}

.cta-box::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: 10%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
}

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

.cta-content h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
}

.cta-content p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-box .btn-white {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

/* === Contact === */
.contact-section {
    background: var(--bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

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

.contact-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 12px;
    background: rgba(99, 102, 241, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--primary-light);
}

.contact-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Form */
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 36px;
}

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

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-dim);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-group select option {
    background: var(--bg-card);
    color: var(--text);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

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

.footer-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}

.footer-links a {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 4px 0;
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-more-link {
    color: var(--primary-light) !important;
    font-weight: 500;
    margin-top: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--border-light);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* === Animations === */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 200% center; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes float1 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(1deg); }
}

@keyframes float2 {
    0%, 100% { transform: translateY(-50%) translateX(0); }
    50% { transform: translateY(calc(-50% + 10px)) translateX(-5px); }
}

@keyframes float3 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-12px) rotate(-1deg); }
}

@keyframes barGrow {
    from { width: 0; }
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* === Scroll Animations === */
.service-card,
.solution-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.service-card.visible,
.solution-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 1024px) {
    .ai-tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .tech-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .tech-visual {
        min-height: 350px;
    }

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

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .cta-box {
        flex-direction: column;
        text-align: center;
        padding: 48px 32px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 10, 15, 0.95);
        backdrop-filter: blur(20px);
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-light);
    }

    .nav-links.active {
        display: flex;
    }

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

    .mobile-toggle {
        display: flex;
    }

    /* 移动端下拉菜单改为展开式 */
    .nav-dropdown-panel {
        position: static;
        transform: none;
        min-width: 100%;
        background: rgba(18, 18, 26, 0.6);
        border: none;
        border-radius: var(--radius);
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        padding: 0;
    }

    .nav-dropdown.open .nav-dropdown-panel {
        max-height: 600px;
    }

    .nav-dropdown-inner {
        padding: 12px;
    }

    .nav-dropdown-item {
        padding: 8px 10px;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }

    .hero-stat {
        min-width: 120px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .ai-tools-grid {
        grid-template-columns: 1fr;
    }

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

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

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

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

    .section {
        padding: 64px 0;
    }

    .tech-card-stack {
        height: 350px;
    }

    .floating-card {
        min-width: 180px;
        padding: 16px 20px;
    }

    .card-1 { left: 5%; }
    .card-2 { right: 0; }
    .card-3 { left: 10%; }

    .news-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero { padding: 100px 0 60px; }
    .hero-title { font-size: 1.8rem; }
    .stat-number { font-size: 1.5rem; }
    .cta-content h2 { font-size: 1.4rem; }
    .contact-form { padding: 24px; }
}