/* ===== CSS 变量 ===== */
:root {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-text-secondary: #6b6b6b;
    --color-text-tertiary: #9b9b9b;
    --color-border: #e8e8e8;
    --color-bg-alt: #f7f7f5;
    --color-bg-dark: #1a1a1a;
    --color-primary: #4F6DF5;
    --color-primary-light: #e8efff;
    --color-purple: #7B3FE4;
    --color-orange: #E8590C;
    --color-green: #0CA678;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
}

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

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    border: none;
    font-family: var(--font-sans);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 14px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-primary {
    background: var(--color-text);
    color: #fff;
}

.btn-primary:hover {
    background: #333;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.btn-secondary:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-text-secondary);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

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

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
}

.logo-icon {
    display: flex;
    align-items: center;
}

.logo-image {
    width: 32px;
    height: 32px;
    object-fit: contain;
    display: block;
}

.logo-text {
    color: var(--color-text);
}

.nav-links {
    display: flex;
    gap: 32px;
    margin-left: 40px;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color 0.2s ease;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-actions .signin {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.nav-actions .signin:hover {
    color: var(--color-text);
}

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

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* ===== Hero ===== */
.hero {
    position: relative;
    padding: 140px 24px 80px;
    overflow: hidden;
}

.hero-bg-gradient {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse at center, rgba(79, 109, 245, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--color-primary-light);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 28px;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.hero-badge:hover {
    transform: translateY(-1px);
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, #4F6DF5 0%, #7B3FE4 50%, #E8590C 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 48px;
}

.hero-trust {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.trust-label {
    font-size: 13px;
    color: var(--color-text-tertiary);
    font-weight: 500;
}

.trust-logos {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    justify-content: center;
}

.trust-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text-tertiary);
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.trust-logo:hover {
    opacity: 1;
}

/* Hero 视觉区域 */
.hero-visual {
    max-width: 1200px;
    margin: 48px auto 0;
}

.hero-mockup {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.12);
    border: 2px solid var(--color-border);
}

.mockup-window {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* ===== Hero Mockup - Notion 风格工作区 ===== */
.mockup-bar {
    height: 36px;
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 16px;
    border-bottom: 1px solid var(--color-border);
}

.mockup-url {
    margin-left: 16px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--color-text-tertiary);
    font-size: 12px;
    background: rgba(0, 0, 0, 0.04);
    padding: 4px 10px;
    border-radius: 6px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28c840; }

.mockup-content {
    display: flex;
    min-height: 560px;
}

/* ===== 侧边栏 ===== */
.mockup-sidebar {
    width: 220px;
    background: var(--color-bg-alt);
    border-right: 1px solid var(--color-border);
    padding: 12px 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

.sidebar-search {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.03);
    color: var(--color-text-tertiary);
    font-size: 12px;
    margin-bottom: 8px;
}

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 8px;
}

.sidebar-section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 8px 8px 4px;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 8px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: background 0.15s ease;
    position: relative;
}

.sidebar-nav-item:hover {
    background: rgba(0, 0, 0, 0.04);
}

.sidebar-nav-item.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 500;
}

.sidebar-nav-item.sub {
    padding-left: 32px;
    font-size: 12px;
}

.nav-emoji {
    font-size: 14px;
    line-height: 1;
    flex-shrink: 0;
}

.nav-text {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-arrow {
    flex-shrink: 0;
    opacity: 0.5;
}

.nav-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-text-tertiary);
    flex-shrink: 0;
    margin-left: 2px;
}

.sidebar-sub-items {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
}

.user-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4F6DF5, #7B3FE4);
    background-size: cover;
    background-position: center;
    flex-shrink: 0;
}

.user-name {
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* ===== 主内容区 ===== */
.mockup-main {
    flex: 1;
    padding: 20px 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
    min-width: 0;
}

.doc-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.breadcrumb-sep {
    opacity: 0.5;
}

.breadcrumb-current {
    color: var(--color-text-secondary);
}

.doc-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.doc-emoji {
    font-size: 28px;
    line-height: 1;
}

.doc-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.doc-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.doc-avatars {
    display: flex;
    align-items: center;
}

.doc-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid #fff;
    background-size: cover;
    background-position: center;
}

.doc-edited {
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.doc-callout {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    background: rgba(79, 109, 245, 0.06);
    border: 1px solid rgba(79, 109, 245, 0.12);
    border-radius: var(--radius-md);
}

.callout-icon {
    font-size: 16px;
    line-height: 1.4;
    flex-shrink: 0;
}

.callout-text {
    font-size: 13px;
    color: var(--color-text);
    line-height: 1.5;
}

/* ===== 文档表格 ===== */
.doc-table {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    font-size: 12px;
}

.table-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 0.8fr 1fr;
    align-items: center;
    padding: 8px 12px;
    border-bottom: 1px solid var(--color-border);
    gap: 8px;
}

.table-row:last-child {
    border-bottom: none;
}

.table-row.table-header {
    background: var(--color-bg-alt);
    font-weight: 600;
    font-size: 11px;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.table-cell {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cell-avatar {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4F6DF5, #7B3FE4);
    background-size: cover;
    background-position: center;
    flex-shrink: 0;
}

.status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 500;
}

.status-badge.done {
    background: rgba(12, 166, 120, 0.12);
    color: #0CA678;
}

.status-badge.progress {
    background: rgba(79, 109, 245, 0.12);
    color: #4F6DF5;
}

.status-badge.todo {
    background: rgba(155, 155, 155, 0.12);
    color: #6b6b6b;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--color-bg-alt);
    border-radius: 100px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 100px;
    transition: width 1s ease;
}

/* ===== 折叠/Toggle ===== */
.doc-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 4px 0;
}

.doc-toggle svg {
    opacity: 0.5;
    flex-shrink: 0;
}

.toggle-text {
    font-weight: 500;
}

/* ===== AI 生成块 ===== */
.doc-ai-block {
    background: linear-gradient(135deg, rgba(79, 109, 245, 0.04), rgba(123, 63, 228, 0.04));
    border: 1px solid rgba(79, 109, 245, 0.1);
    border-radius: var(--radius-md);
    padding: 14px 16px;
}

.ai-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    background: rgba(79, 109, 245, 0.1);
    color: var(--color-primary);
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
}

.ai-time {
    font-size: 11px;
    color: var(--color-text-tertiary);
}

.ai-block-text {
    font-size: 13px;
    line-height: 1.6;
    color: var(--color-text);
    margin-bottom: 12px;
}

.ai-block-actions {
    display: flex;
    gap: 8px;
}

.ai-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
    font-size: 12px;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: var(--font-sans);
}

.ai-action-btn:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-text-tertiary);
}

/* ===== 右侧 AI 面板 ===== */
.mockup-ai-panel {
    width: 280px;
    border-left: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    background: #fff;
}

.ai-panel-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--color-border);
}

.ai-panel-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, #4F6DF5, #7B3FE4);
    color: #fff;
}

.ai-panel-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.ai-panel-messages {
    flex: 1;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.ai-message {
    display: flex;
    gap: 10px;
}

.ai-message.user {
    flex-direction: row-reverse;
}

.msg-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.msg-text {
    font-size: 13px;
    line-height: 1.5;
    color: var(--color-text);
}

.ai-message.user .msg-text {
    background: var(--color-primary-light);
    padding: 8px 12px;
    border-radius: var(--radius-md) var(--radius-md) 2px var(--radius-md);
    color: var(--color-primary);
    font-size: 13px;
    max-width: 200px;
}

.msg-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: var(--color-bg-alt);
    padding: 10px 12px;
    border-radius: 2px var(--radius-md) var(--radius-md) var(--radius-md);
    max-width: 220px;
}

.msg-content .msg-text {
    margin: 0;
}

.msg-content strong {
    color: var(--color-primary);
    font-weight: 700;
}

.msg-stats {
    display: flex;
    gap: 16px;
    padding: 8px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.msg-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.stat-num {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
}

.stat-lbl {
    font-size: 10px;
    color: var(--color-text-tertiary);
}

.msg-citation {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--color-text-tertiary);
}

.ai-panel-input {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--color-border);
}

.ai-panel-input input {
    flex: 1;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-size: 13px;
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
    outline: none;
    background: var(--color-bg-alt);
}

.ai-send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--color-text);
    color: #fff;
    border: none;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s ease;
}

.ai-send-btn:hover {
    background: #333;
}

/* ===== 通用 Section ===== */
.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 64px;
    padding: 0 24px;
}

.section-eyebrow {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 17px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===== 服务区域 ===== */
.services {
    padding: 100px 24px;
    background: var(--color-bg-alt);
}

.services-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.service-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

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

.service-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    background: var(--color-bg-alt);
}

.service-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.service-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
    transition: gap 0.2s ease;
}

.service-link:hover {
    gap: 8px;
}

/* ===== 解决方案区域 ===== */
.solutions {
    padding: 100px 24px;
}

.solutions-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 100px;
}

.solution-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.solution-block.reverse {
    direction: rtl;
}

.solution-block.reverse > * {
    direction: ltr;
}

.solution-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 4px 12px;
    border-radius: 100px;
    margin-bottom: 16px;
}

.solution-title {
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.solution-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.solution-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.solution-features li {
    font-size: 15px;
    color: var(--color-text);
    padding-left: 24px;
    position: relative;
}

.solution-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary-light);
}

.solution-features li::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 4px;
    height: 7px;
    border-right: 2px solid var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
}

.solution-visual {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: none;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 360px;
    padding: 0;
}

.solution-visual img {
    width: 100%;
    height: auto;
    max-height: 520px;
    object-fit: contain;
    aspect-ratio: auto;
    border-radius: 0;
}

.solution-security-image {
    transform: none;
    transform-origin: center center;
}

.solution-visual-security {
    border-radius: 12px;
}

/* ===== 客户案例 ===== */
.cases {
    padding: 100px 24px;
    background: var(--color-bg-alt);
}

.cases-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.case-visual {
    overflow: hidden;
    aspect-ratio: 4 / 3;
}

.case-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.case-card:hover .case-visual img {
    transform: scale(1.05);
}

.case-body {
    padding: 24px;
}

.case-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 3px 10px;
    border-radius: 100px;
    margin-bottom: 12px;
}

.case-title {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
}

.case-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-metrics {
    display: flex;
    gap: 32px;
    padding: 16px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 16px;
}

.metric {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.metric-value {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-text);
    line-height: 1;
}

.metric-unit {
    font-size: 14px;
    font-weight: 600;
}

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

.case-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
    transition: gap 0.2s ease;
}

.case-link:hover {
    gap: 8px;
}

/* ===== 客户评价 ===== */
.testimonials {
    padding: 100px 0;
    overflow: hidden;
}

.testimonials-marquee {
    overflow: hidden;
    position: relative;
    mask-image: linear-gradient(to right, transparent 0%, #000 10%, #000 90%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 10%, #000 90%, transparent 100%);
}

.testimonials-track {
    display: flex;
    gap: 24px;
    animation: marquee 40s linear infinite;
    width: max-content;
}

.testimonials-track:hover {
    animation-play-state: paused;
}

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

.testimonial-card {
    width: 420px;
    flex-shrink: 0;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--color-border);
}

.testimonial-text {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-purple));
    background-size: cover;
    background-position: center;
    flex-shrink: 0;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-size: 14px;
    font-weight: 600;
}

.author-role {
    font-size: 13px;
    color: var(--color-text-tertiary);
}

/* ===== 统计数据 ===== */
.stats-section {
    padding: 80px 24px;
    background: var(--color-bg-dark);
    color: #fff;
}

.stats-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.stat-number {
    font-size: 56px;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, #fff 0%, #999 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-plus {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
    margin-top: -8px;
}

.stat-label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 500;
}

/* ===== CTA 区域 ===== */
.cta-section {
    padding: 100px 24px;
}

.cta-card {
    max-width: 900px;
    margin: 0 auto;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    border-radius: var(--radius-lg);
    padding: 64px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79, 109, 245, 0.15) 0%, transparent 60%);
    pointer-events: none;
}

.cta-content {
    position: relative;
}

.cta-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: #fff;
}

.cta-desc {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
}

.cta-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 32px;
}

.cta-section .btn-primary {
    background: #fff;
    color: var(--color-text);
}

.cta-section .btn-primary:hover {
    background: #f0f0f0;
}

.cta-section .btn-secondary {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.3);
}

.cta-section .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.cta-features {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.check {
    color: var(--color-green);
    font-weight: 700;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 64px 24px 32px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.5fr 2.5fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-tagline {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: #fff;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all 0.2s ease;
}

.social-link:hover {
    color: var(--color-text);
    border-color: var(--color-text);
    transform: translateY(-2px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    padding-left: 60px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-heading {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 4px;
}

.footer-col a {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: color 0.2s ease;
}

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

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.footer-bottom-links {
    display: flex;
    gap: 8px;
    font-size: 13px;
}

.footer-bottom-links a {
    color: var(--color-text-tertiary);
    transition: color 0.2s ease;
}

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

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

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

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

    .solution-block.reverse {
        direction: ltr;
    }

    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }

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

    .nav-links .nav-link {
        font-size: 16px;
        padding: 8px 0;
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 120px 20px 60px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
        margin: 0 auto 40px;
    }

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

    .mockup-sidebar {
        display: none;
    }

    .mockup-ai-panel {
        display: none;
    }

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

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

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

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

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .cta-actions {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
        margin: 0 auto 32px;
    }

    .cta-card {
        padding: 48px 24px;
    }

    .section-header {
        margin-bottom: 40px;
    }
}

@media (max-width: 480px) {
    .trust-logos {
        gap: 16px;
    }

    .trust-logo {
        font-size: 14px;
    }

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

/* ===== 服务详情面板 ===== */
.service-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(20, 24, 35, 0.18);
    z-index: 2000;
    display: flex;
    justify-content: flex-end;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.service-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.service-modal {
    width: min(720px, 100%);
    height: 100vh;
    background: #ffffff;
    color: var(--color-text);
    border-left: 1px solid var(--color-border);
    box-shadow: -24px 0 60px rgba(0, 0, 0, 0.12);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    position: relative;
}

.service-modal-overlay.active .service-modal {
    transform: translateX(0);
}

.service-modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.service-modal-close:hover {
    color: var(--color-text);
    background: var(--color-bg-alt);
}

.service-modal-scroll {
    height: 100%;
    overflow-y: auto;
    padding: 48px 40px 40px;
}

.service-modal-kicker {
    display: inline-block;
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}

.service-modal-version {
    display: block;
    font-size: 28px;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.service-modal-title {
    font-size: clamp(34px, 5vw, 56px);
    line-height: 1.08;
    letter-spacing: -0.04em;
    margin-bottom: 20px;
}

.service-modal-desc {
    max-width: 560px;
    font-size: 18px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

.service-modal-preview {
    margin-bottom: 36px;
}

.preview-window {
    border: 1px solid var(--color-border);
    border-radius: 22px;
    background: linear-gradient(180deg, #ffffff, #f8f9fc);
    overflow: hidden;
}

.preview-topbar {
    height: 48px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 18px;
}

.preview-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #d5dae5;
}

.preview-body {
    display: grid;
    grid-template-columns: 170px 1fr;
    min-height: 320px;
}

.preview-sidebar {
    border-right: 1px solid var(--color-border);
    padding: 22px 16px;
}

.preview-sidebar-title {
    display: block;
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-bottom: 18px;
}

.preview-sidebar-item {
    height: 38px;
    border-radius: 12px;
    background: #f2f4f8;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    padding: 0 14px;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.preview-sidebar-item.active {
    background: linear-gradient(90deg, rgba(79, 109, 245, 0.14), rgba(123, 63, 228, 0.08));
    border: 1px solid rgba(79, 109, 245, 0.2);
    color: var(--color-text);
}

.preview-main {
    padding: 22px;
}

.preview-card {
    border: 1px solid var(--color-border);
    background: #ffffff;
    border-radius: 18px;
    padding: 20px;
}

.preview-card-large {
    min-height: 170px;
    margin-bottom: 16px;
}

.preview-card-label,
.preview-mini-title {
    display: block;
    color: var(--color-text-secondary);
    font-size: 13px;
    margin-bottom: 12px;
}

.preview-content-list {
    display: grid;
    gap: 10px;
}

.preview-content-item {
    min-height: 42px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: #f8f9fc;
    padding: 10px 14px;
    display: flex;
    align-items: center;
    font-size: 14px;
    color: var(--color-text-secondary);
}

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

.preview-mini-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.service-modal-caption {
    display: inline-block;
    margin-top: 12px;
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.service-modal-section-title {
    font-size: 34px;
    line-height: 1.15;
    margin-bottom: 22px;
}

.service-modal-table {
    border-top: 1px solid var(--color-border);
}

.service-modal-row {
    display: grid;
    grid-template-columns: 148px 1fr;
    gap: 24px;
    padding: 18px 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.service-modal-head {
    color: var(--color-text-tertiary);
    font-size: 13px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

body.modal-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .service-modal {
        width: 100%;
    }

    .service-modal-scroll {
        padding: 40px 24px 28px;
    }

    .preview-body {
        grid-template-columns: 1fr;
    }

    .preview-sidebar {
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }

    .preview-grid,
    .service-modal-row {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .service-modal-section-title {
        font-size: 28px;
    }
}

/* ===== 免费咨询浮窗 ===== */
.consult-modal-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(20, 24, 35, 0.18);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
    z-index: 2100;
}

.consult-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.consult-modal {
    position: relative;
    width: min(640px, 100%);
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 24px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.12);
    padding: 32px;
}

.consult-modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.consult-modal-kicker {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.consult-modal-title {
    font-size: clamp(28px, 4vw, 40px);
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}

.consult-modal-desc {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.consult-form {
    display: grid;
    gap: 18px;
}

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

.consult-field {
    display: grid;
    gap: 8px;
}

.consult-field span {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.consult-field input,
.consult-field select,
.consult-field textarea {
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background: #fff;
    padding: 14px 16px;
    font-size: 15px;
    font-family: var(--font-sans);
    color: var(--color-text);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.consult-field input:focus,
.consult-field select:focus,
.consult-field textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 109, 245, 0.1);
}

.consult-field textarea {
    resize: vertical;
    min-height: 120px;
}

.consult-modal-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.consult-modal-note {
    font-size: 14px;
    color: var(--color-text-secondary);
}

@media (max-width: 768px) {
    .consult-modal {
        padding: 24px;
        border-radius: 20px;
    }

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

    .consult-modal-actions {
        flex-direction: column;
    }

    .consult-modal-actions .btn {
        width: 100%;
    }
}