:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --bg-tertiary: #e8e8ed;
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-card-hover: rgba(255, 255, 255, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.72);
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-tertiary: #86868b;
    --accent: #0071e3;
    --accent-hover: #0077ED;
    --accent-blue: #0071e3;
    --accent-primary: #0071e3;
    --accent-purple: #5e5ce6;
    --accent-rgb: 0, 113, 227;
    --accent-gradient: linear-gradient(135deg, #0071e3, #5e5ce6);
    --border-color: rgba(255, 255, 255, 0.92);
    --border-glass: rgba(255, 255, 255, 0.92);
    --border-glass-hover: rgba(255, 255, 255, 0.85);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --duration-fast: 0.15s;
    --duration-normal: 0.25s;
    --duration-slow: 0.4s;
    --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
    --shadow-card: 0 2px 12px rgba(255, 255, 255, 0.92), 0 8px 32px rgba(255, 255, 255, 0.85);
    --shadow-float: 0 8px 32px rgba(255, 255, 255, 0.85);
    --font-main: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', sans-serif;
    --max-width: 1200px;
    --section-padding: clamp(80px, 10vw, 120px);
    --surface-elevated: #ffffff;
    --glow: rgba(0,113,227,0.1);
}



/* =====================================================
   超核文化传媒 chwhcm.cn
   Apple-Inspired Dark Theme - 完全重构版
   ===================================================== */

/* ==================== 字体加载 ==================== */
500;600;700&display=swap');

/* ==================== CSS 变量 ==================== */

/* ==================== 全局重置 ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

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

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

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: opacity var(--duration-fast) var(--ease-out);
}

a:hover {
    opacity: 0.8;
    text-decoration: none;
}

button {
    font-family: var(--font-main);
    cursor: pointer;
    border: none;
    outline: none;
}

/* ==================== 滚动条美化 ==================== */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ==================== 文本选择 ==================== */
::selection {
    background: var(--accent-blue);
    color: white;
}

/* ==================== 布局工具 ==================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 clamp(20px, 5vw, 48px);
}

.section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: clamp(48px, 8vw, 96px);
}

.section-eyebrow {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #007AFF;
    margin-bottom: 16px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(0,122,255,0.12);
    border: 1px solid rgba(0,122,255,0.2);
    border-radius: 980px;
}

.section-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ==================== 动画基础类 ==================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
}

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

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

/* ==================== 背景光效 ==================== */
.bg-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
}

.bg-glow-blue {
    background: radial-gradient(circle, rgba(10,132,255,0.15) 0%, transparent 70%);
}

.bg-glow-purple {
    background: radial-gradient(circle, rgba(191,90,242,0.1) 0%, transparent 70%);
}

/* ==================== 顶部导航 ==================== */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.92);
    transition: all var(--duration-normal) var(--ease-out);
}

.site-nav.scrolled {
    background: rgba(255,255,255,0.92);
    border-bottom-color: rgba(255, 255, 255, 0.92);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out);
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.06);
    opacity: 1;
}

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

.nav-phone {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #007AFF !important;
    color: #ffffff !important;
    font-weight: 600;
    font-size: 14px !important;
    padding: 10px 22px !important;
    border-radius: 980px !important;
    transition: all var(--duration-fast) var(--ease-out) !important;
    letter-spacing: 0.3px;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,122,255,0.35), 0 1px 3px rgba(255, 255, 255, 0.92);
}

.nav-phone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 60%);
    pointer-events: none;
    border-radius: inherit;
}

.nav-phone:hover {
    opacity: 1 !important;
    transform: scale(1.05) translateY(-1px);
    box-shadow: 0 4px 20px rgba(0,122,255,0.5), 0 2px 6px rgba(255, 255, 255, 0.85);
    background: #0066D6 !important;
}

/* 浅色主题下手机号按钮 */

/* 移动端菜单 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    padding: 8px;
    cursor: pointer;
}

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

.nav-mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.92);
    padding: 20px;
    z-index: 999;
}

.nav-mobile-menu.open {
    display: block;
}

.nav-mobile-menu a {
    display: block;
    color: var(--text-secondary);
    font-size: 16px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    text-decoration: none;
    transition: color var(--duration-fast);
}

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

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-toggle { display: flex; }
}

/* ==================== Hero 区域 ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 64px;
}

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

.hero-bg-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(10,132,255,0.18) 0%, transparent 60%);
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(circle, rgba(10,132,255,0.12) 0%, transparent 70%);
}

.hero-glow-2 {
    width: 400px;
    height: 400px;
    bottom: 100px;
    right: 10%;
    background: radial-gradient(circle, rgba(191,90,242,0.08) 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: 0 24px;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #ffffff;
    margin-bottom: 24px;
    padding: 10px 20px;
    background: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
    border: none;
    border-radius: 980px;
    box-shadow: 0 4px 16px rgba(0,122,255,0.3);
    animation: fadeInUp 0.8s var(--ease-out) forwards;
    opacity: 0;
}

.hero-eyebrow::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-blue);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(40px, 7vw, 88px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 28px;
    animation: fadeInUp 0.8s var(--ease-out) 0.1s forwards;
    opacity: 0;
}

.hero-title .gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(17px, 2.5vw, 22px);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 640px;
    margin: 0 auto 48px;
    animation: fadeInUp 0.8s var(--ease-out) 0.2s forwards;
    opacity: 0;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s var(--ease-out) 0.3s forwards;
    opacity: 0;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: clamp(32px, 6vw, 80px);
    margin-top: 80px;
    animation: fadeInUp 0.8s var(--ease-out) 0.4s forwards;
    opacity: 0;
}

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

.hero-stat-number {
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1;
  white-space: nowrap;}

.hero-stat-number .accent { color: var(--accent-blue); }

.hero-stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 8px;
    font-weight: 500;
}

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

/* ==================== 按钮系统 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    transition: all var(--duration-fast) var(--ease-out);
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 20px rgba(10,132,255,0.3);
}

.btn-primary:hover {
    opacity: 0.92;
    transform: scale(1.03);
    box-shadow: 0 6px 28px rgba(10,132,255,0.45);
    color: white;
    text-decoration: none;
}

.btn-secondary {
    background: rgba(255,255,255,0.08);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.12);
    border-color: var(--border-glass-hover);
    transform: scale(1.03);
    color: var(--text-primary);
    text-decoration: none;
}

.btn-lg {
    padding: 18px 36px;
    font-size: 17px;
}

.btn-icon {
    font-size: 18px;
}

/* ==================== 服务卡片 ==================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 900px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .services-grid { grid-template-columns: 1fr; }
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: clamp(28px, 4vw, 40px);
    transition: all var(--duration-normal) var(--ease-out);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

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

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

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

.service-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    background: rgba(10,132,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 24px;
    transition: all var(--duration-normal);
}

.service-card:hover .service-icon {
    background: rgba(10,132,255,0.18);
    transform: scale(1.1);
}

.service-card-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.service-card-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.service-card-price {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-blue);
    padding: 6px 14px;
    background: rgba(10,132,255,0.1);
    border-radius: 50px;
    margin-bottom: 16px;
}

.service-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service-tag {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent-blue);
    padding: 5px 12px;
    background: rgba(0,122,255,0.1);
    border-radius: 980px;
    border: 1px solid rgba(0,122,255,0.18);
    letter-spacing: 0.02em;
}

/* ==================== 数字统计 ==================== */
.stats-section {
    position: relative;
}

.stats-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 80% at 50% 50%, rgba(10,132,255,0.06) 0%, transparent 70%);
    pointer-events: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-glass);
}

@media (max-width: 768px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

.stat-item {
    background: var(--bg-primary);
    padding: clamp(32px, 5vw, 56px) 24px;
    text-align: center;
    transition: background var(--duration-fast);
}

.stat-item:hover {
    background: var(--bg-secondary);
}

.stat-number {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 8px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-number-static {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 8px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  white-space: nowrap;}

.stat-label {
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-sub {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* ==================== 特色区块 ==================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 900px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .features-grid { grid-template-columns: 1fr; }
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: clamp(24px, 3vw, 36px);
    transition: all var(--duration-normal) var(--ease-out);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-card);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==================== 案例展示 ==================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 900px) {
    .cases-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .cases-grid { grid-template-columns: 1fr; }
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

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

.case-card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--bg-tertiary);
}

.case-card-body {
    padding: 24px;
}

.case-card-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    color: #007AFF;
    padding: 5px 14px;
    background: rgba(0,122,255,0.12);
    border-radius: 980px;
    border: 1px solid rgba(0,122,255,0.2);
    margin-bottom: 12px;
    letter-spacing: 0.03em;
}

.case-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
}

.case-card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.case-card-stats {
    display: flex;
    gap: 16px;
}

.case-stat {
    text-align: center;
    flex: 1;
    padding: 12px;
    background: rgba(255,255,255,0.03);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.05);
}

.case-stat-num {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent-blue);
  white-space: nowrap;}

.case-stat-label {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* ==================== 服务详情 ==================== */
.service-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    margin-bottom: var(--section-padding);
}

.service-detail.reverse {
    direction: rtl;
}

.service-detail.reverse > * {
    direction: ltr;
}

@media (max-width: 900px) {
    .service-detail,
    .service-detail.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
        gap: 40px;
    }
}

.service-detail-visual {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-tertiary);
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.service-detail-visual-placeholder {
    font-size: 120px;
    opacity: 0.15;
}

.service-detail-content .section-eyebrow {
    text-align: left;
}

.service-detail-content .section-title {
    text-align: left;
    font-size: clamp(28px, 4vw, 44px);
}

.service-detail-content .section-subtitle {
    text-align: left;
    margin: 0 0 32px 0;
}

.service-detail-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.service-detail-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    color: var(--text-secondary);
}

.service-detail-features li .check {
    width: 24px;
    height: 24px;
    background: rgba(10,132,255,0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--accent-blue);
    flex-shrink: 0;
}

/* ==================== 客户证言 ==================== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 900px) {
    .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .testimonials-grid { grid-template-columns: 1fr; }
}

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: clamp(24px, 3vw, 36px);
    position: relative;
}

.testimonial-quote {
    font-size: 48px;
    color: var(--accent-blue);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 16px;
    font-family: Georgia, serif;
}

.testimonial-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

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

.testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: white;
}

.testimonial-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.testimonial-role {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

/* ==================== FAQ 手风琴 ==================== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--duration-normal);
}

.faq-item:hover {
    border-color: var(--border-glass-hover);
}

.faq-item.active {
    border-color: rgba(10,132,255,0.3);
    background: rgba(10,132,255,0.03);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    cursor: pointer;
    background: none;
    width: 100%;
    text-align: left;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-main);
    gap: 16px;
    transition: color var(--duration-fast);
}

.faq-question:hover {
    color: var(--accent-blue);
}

.faq-question.active {
    color: var(--accent-blue);
}

.faq-toggle {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 18px;
    transition: all var(--duration-normal);
    color: var(--text-secondary);
}

.faq-item.active .faq-toggle {
    background: var(--accent-blue);
    color: white;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--duration-normal) var(--ease-out);
}

.faq-answer-inner {
    padding: 0 28px 24px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

/* ==================== CTA 区块 ==================== */
.cta-section {
    position: relative;
    text-align: center;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(10,132,255,0.12) 0%, transparent 70%);
    pointer-events: none;
}

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

.cta-title {
    font-size: clamp(32px, 5vw, 64px);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 20px;
}

.cta-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.cta-phone {
    font-size: clamp(24px, 4vw, 40px);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    margin-bottom: 32px;
}

.cta-phone a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: all var(--duration-fast);
}

.cta-phone a:hover {
    opacity: 0.8;
}

/* ==================== 联系表单 ==================== */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    text-align: left;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-size: 16px;
    color: var(--text-primary);
    font-family: var(--font-main);
    transition: all var(--duration-fast);
    outline: none;
    -webkit-appearance: none;
}

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

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--accent-blue);
    background: rgba(10,132,255,0.05);
    box-shadow: 0 0 0 3px rgba(10,132,255,0.1);
}

.form-select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2386868b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

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

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

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

@media (max-width: 560px) {
    .form-row { grid-template-columns: 1fr; }
}

/* ==================== 8大AI平台 ==================== */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 20px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color, rgba(255,255,255,0.08));
    border-radius: 16px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    cursor: pointer;
}

.platform-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-blue, #0a84ff);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(10,132,255,0.15);
    text-decoration: none;
    color: inherit;
}

.platform-item:hover .platform-link-icon {
    opacity: 1;
    transform: translate(1px, -1px);
}

.platform-logo-wrap {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 4px;
}

.platform-logo {
    width: 64px;
    height: 64px;
    object-fit: contain;
    border-radius: 14px;
}

.platform-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0;
}

.platform-link-icon {
    font-size: 12px;
    color: var(--accent-blue, #0a84ff);
    opacity: 0.5;
    transition: all 0.2s ease;
    line-height: 1;
}

.platform-default-q {
    font-size: 11px;
    color: var(--text-tertiary);
    text-align: center;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 6px;
    padding: 3px 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* ==================== Footer ==================== */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 60px 0 40px;
}

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

@media (max-width: 900px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 560px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-brand-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: 16px;
    max-width: 300px;
}

.footer-col-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

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

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

.footer-links a:hover {
    color: var(--text-primary);
    opacity: 1;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.footer-contact-icon {
    width: 20px;
    text-align: center;
    color: var(--accent-blue);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

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

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

.footer-social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--text-secondary);
    transition: all var(--duration-fast);
    text-decoration: none;
}

.footer-social a:hover {
    background: var(--accent-blue);
    color: white;
    opacity: 1;
}

/* ==================== 页面专属 Hero ==================== */
.page-hero {
    padding-top: calc(64px + clamp(60px, 10vw, 120px));
    padding-bottom: clamp(60px, 10vw, 120px);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(10,132,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.page-hero .section-eyebrow {
    margin-bottom: 16px;
}

.page-hero .section-title {
    margin-bottom: 16px;
}

/* ==================== 信任徽章 ==================== */
.trust-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
    margin-top: 24px;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.trust-badge-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(10,132,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--accent-blue);
}

/* ==================== 悬浮工具栏 ==================== */
.floating-bar {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.floating-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--accent-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    box-shadow: 0 4px 20px rgba(10,132,255,0.4);
    transition: all var(--duration-fast);
    text-decoration: none;
    border: none;
    cursor: pointer;
}

.floating-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 28px rgba(10,132,255,0.5);
    opacity: 1;
}

.floating-btn.wechat {
    background: #07c160;
    box-shadow: 0 4px 20px rgba(7,193,96,0.4);
}

.floating-btn.wechat:hover {
    box-shadow: 0 6px 28px rgba(7,193,96,0.5);
}

.floating-btn.phone {
    background: var(--accent-blue);
}

/* ==================== 分隔线 ==================== */
.divider {
    width: 48px;
    height: 4px;
    background: var(--accent-gradient);
    border-radius: 2px;
    margin: 24px auto;
}

.divider-left {
    margin: 24px 0;
}

/* ==================== 图片占位 ==================== */
.img-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #0a0a0a 0%, #1c1c1e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 48px;
    border-radius: var(--radius-md);
}

/* ==================== 标签 ==================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border-radius: 980px;
    font-size: 13px;
    font-weight: 700;
    background: rgba(0,122,255,0.12);
    color: #007AFF;
    border: 1px solid rgba(0,122,255,0.22);
    letter-spacing: 0.02em;
}

.badge-success {
    background: rgba(48,209,88,0.1);
    color: #30d158;
    border-color: rgba(48,209,88,0.2);
}

.badge-purple {
    background: rgba(191,90,242,0.1);
    color: var(--accent-purple);
    border-color: rgba(191,90,242,0.2);
}

/* ==================== Toast 提示 ==================== */
.toast {
    position: fixed;
    bottom: 100px;
    right: 24px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 16px 24px;
    font-size: 15px;
    color: var(--text-primary);
    box-shadow: var(--shadow-card);
    z-index: 9999;
    transform: translateY(20px);
    opacity: 0;
    transition: all var(--duration-normal);
    display: flex;
    align-items: center;
    gap: 12px;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    border-color: rgba(48,209,88,0.3);
}

.toast.success .toast-icon {
    color: #30d158;
}

.toast-icon {
    font-size: 20px;
}

/* ==================== 减少动画偏好 ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1 !important;
        transform: none !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    .site-nav,
    .floating-bar,
    .hero-actions,
    .cta-actions { display: none; }

    body { color: black; background: white; }
}

/* =====================================================
   双色主题系统
   ===================================================== */

/* 默认跟随系统 */

/* 浅色主题覆盖 */

/* 深色主题覆盖 */

/* ====== 通用过渡 ====== */

/* ====== 主题切换按钮 ====== */

/* 浅色主题下按钮样式 */

/* 深色主题下按钮样式 */

/* ====== 浅色主题下导航 ====== */

/* 导航切换按钮容器 */

/* ====== 浅色主题 Hero ====== */

/* ====== 浅色主题卡片 ====== */

/* ====== 浅色主题 CTA ====== */

/* ====== 浅色主题 Footer ====== */

/* ====== 浅色主题 Contact Form ====== */

/* ====== 移动端菜单浅色 ====== */

/* ====== 浅色主题 FAQ ====== */

/* ====== 苹果浅色专属字体/图标 ====== */

/* ====== 透明背景页面（geo/cases）浅色支持 ====== */

/* 导航主题按钮 - 独立 li */

/* 移动端隐藏 */

}

.office-img-wrapper {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(255,255,255,0.08),
        0 20px 60px rgba(255, 255, 255, 0.85),
        0 4px 16px rgba(255, 255, 255, 0.85);
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.6s ease;
}

.office-img-wrapper:hover {
    transform: scale(1.01);
    box-shadow:
        0 0 0 1px rgba(255,255,255,0.12),
        0 30px 80px rgba(255, 255, 255, 0.85),
        0 8px 24px rgba(255, 255, 255, 0.85);
}

.office-img-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.office-img-wrapper:hover img {
    transform: scale(1.03);
}

/* 渐变遮罩 */
.office-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 45%;
    background: linear-gradient(to top, rgba(255, 255, 255, 0.92) 0%, transparent 100%);
    pointer-events: none;
    z-index: 1;
}

/* 底部文字说明 */
.office-caption {
    position: absolute;
    bottom: 24px;
    left: 28px;
    right: 28px;
    z-index: 2;
    color: #fff;
}

.office-badge {
    display: inline-block;
    background: rgba(0,122,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 6px 16px;
    border-radius: 980px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin-bottom: 8px;
}

.office-text {
    font-size: 15px;
    opacity: 0.9;
    margin: 0;
    text-shadow: 0 1px 3px rgba(255, 255, 255, 0.85);
}

/* 浅色主题微调 */

/* 响应式 */
@media (max-width: 768px) {
    .office-img-wrapper {
        border-radius: 18px;
    }
    
    .office-caption {
        bottom: 16px;
        left: 18px;
        right: 18px;
    }
    
    .office-badge {
        font-size: 11px;
        padding: 5px 12px;
    }
    
    .office-text {
        font-size: 13px;
    }
}

/* =====================================================
   统一 Footer - Apple 风格四列布局
   ===================================================== */
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding: 50px 0 30px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.footer-desc {
    font-size: 14px;
    color: var(--text-tertiary);
    line-height: 1.6;
    margin: 0;
}

.footer-social {
    display: flex;
    gap: 10px;
    margin-top: 6px;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    color: var(--text-secondary);
    font-size: 16px;
    transition: all 0.3s ease;
    text-decoration: none !important;
}

.footer-social a:hover {
    background: rgba(0,122,255,0.2);
    color: #007AFF;
    transform: translateY(-2px);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-links li a {
    color: var(--text-tertiary);
    font-size: 14px;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links li a:hover {
    color: #007AFF;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    margin-top: 10px;
}

/* 响应式 */
@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
        padding: 35px 0 20px;
    }
    
    .footer-col:first-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

.footer-brand {
    flex: 0 0 300px;
}

.footer-brand img {
    height: 40px;
    margin-bottom: 16px;
}

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

.footer-section {
    flex: 1;
    min-width: 200px;
}

.footer-section h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px 24px;
}

.footer-links-grid a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

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

.beian {
    text-align: center;
    padding: 24px;
    border-top: 1px solid var(--border-glass);
    font-size: 13px;
    color: var(--text-tertiary);
}

.beian a {
    color: var(--text-tertiary);
    text-decoration: none;
}

.beian a:hover {
    color: var(--accent-primary);
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        gap: 32px;
    }
    
    .footer-brand {
        flex: none;
    }
    
    .footer-links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === Footer 分组设计 === */
.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px;
    gap: 48px;
}

.footer-brand {
    flex: 0 0 280px;
}

.footer-brand img {
    height: 36px;
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-secondary, #666);
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

.footer-columns {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    gap: 64px;
}

.footer-column {
    min-width: 120px;
}

.footer-column h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary, #1a1a1a);
    margin: 0 0 16px 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-column a {
    display: block;
    color: var(--text-secondary, #666);
    text-decoration: none;
    font-size: 14px;
    line-height: 2;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: var(--accent-primary, #0066FF);
}

.footer-bottom {
    text-align: center;
    padding: 20px;
    border-top: 1px solid var(--border-glass, rgba(255, 255, 255, 0.92));
}

.footer-bottom a {
    color: var(--text-tertiary, #999);
    text-decoration: none;
    font-size: 13px;
}

.footer-bottom a:hover {
    color: var(--accent-primary, #0066FF);
}

/* Dark mode */

/* 响应式 */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        gap: 32px;
    }
    
    .footer-brand {
        flex: none;
        text-align: center;
    }
    
    .footer-columns {
        justify-content: center;
        gap: 32px;
    }
    
    .footer-column {
        text-align: center;
    }
}

/* ---------- 补丁 2026-05-05b ---------- */

/* hero glow follow (chwhcm) */
.hero-glow-follow {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,0.12) 0%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: left 0.3s ease, top 0.3s ease;
  z-index: 0;
}

/* packages wrapper (jiage) */
.packages { padding: 80px 0; }

/* pricing header (douyin/shipin/xiaohongshu) */
.pricing-header { text-align: center; margin-bottom: 40px; }

/* section-pricing */
.section-pricing { padding: 80px 0; }

/* pricing card variants (douyin) */
.pricing-card-icon { width: 48px; height: 48px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 16px; background: rgba(59,130,246,0.1); }
.pricing-card-title { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.pricing-card-sub { font-size: 14px; color: #6b7280; margin-bottom: 16px; }
.pricing-card-price { font-size: 36px; font-weight: 800; color: #1e293b; }

/* metric row (douyin) */
.metric-row { display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; margin-top: 20px; }

/* float variants */
.float-btn.top { position: relative; }
.float-tag.t1, .float-tag.t2 { position: absolute; top: -6px; right: -6px; min-width: 18px; height: 18px; border-radius: 9px; background: #ef4444; color: #fff; font-size: 11px; font-weight: 700; display: flex; align-items: center; justify-content: center; padding: 0 4px; }
.note-float.t1 { background: rgba(236,72,153,0.9); color: #fff; }
.note-float.t2 { background: rgba(59,130,246,0.9); color: #fff; }

/* types header (shipin) */
.types-header { text-align: center; margin-bottom: 40px; }

/* content header (xiaohongshu) */
.content-header { text-align: center; margin-bottom: 40px; }

/* what-features (benditui) */
.what-features { margin-top: 40px; }

/* Logo 主题切换 */
.nav-logo 
.nav-logo 

/* 手动切换 */

/* 系统主题 */
}
/* ========== LOGO CONTAINER ========== */
/* 导航栏 logo 容器 */
.nav-logo { display: flex; align-items: center; flex-shrink: 0; }
.nav-logo a { display: flex; align-items: center; }
.nav-logo img { vertical-align: middle; }

/* 页脚 logo */
.footer-logo { margin-bottom: 16px; }
.footer-logo a { display: inline-flex; align-items: center; }