/* ===== 基础重置和变量 ===== */
:root {
    --primary-color: #E53935; /* 品牌红 */
    --secondary-color: #111827; /* 深灰 */
    --accent-color: #F59E0B; /* 强调色 */
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --background: #FFFFFF;
    --surface: #F8FAFC;
    --surface-elevated: #FFFFFF;
    --border-light: rgba(17, 24, 39, 0.08);
    --shadow-light: 0 2px 10px rgba(17, 24, 39, 0.06);
    --shadow-medium: 0 8px 24px rgba(17, 24, 39, 0.10);
    --shadow-heavy: 0 12px 48px rgba(17, 24, 39, 0.14);
    --radius-small: 8px;
    --radius-medium: 12px;
    --radius-large: 20px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-light);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-img { height: 56px; display: block; }

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 16px;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-fast);
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ===== 主视觉区 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px var(--spacing-md) 0;
    background:
        radial-gradient(1200px 600px at 80% 18%, rgba(255, 48, 48, 0.28), transparent 62%),
        radial-gradient(900px 480px at 12% 78%, rgba(229, 57, 53, 0.24), transparent 62%),
        radial-gradient(600px 320px at 50% 60%, rgba(255, 30, 30, 0.18), transparent 70%),
        linear-gradient(180deg, #0A0A0E 0%, #141218 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        /* 红色霓虹光斑（更强）*/
        radial-gradient(680px 420px at 22% 32%, rgba(255, 60, 60, 0.40), transparent 62%),
        radial-gradient(900px 520px at 78% 22%, rgba(233, 60, 60, 0.32), transparent 66%),
        /* 高光与晕影 */
        radial-gradient(420px 280px at 58% 58%, rgba(255,255,255,0.14), transparent 74%),
        /* 科技网格（略增强） */
        repeating-linear-gradient(0deg, rgba(255,255,255,0.08) 0 1px, transparent 1px 18px),
        repeating-linear-gradient(90deg, rgba(255,255,255,0.06) 0 1px, transparent 1px 18px);
    background-size: auto, auto, auto, 18px 18px, 18px 18px;
    background-position: 0 0, 0 0, 0 0, 0 0, 0 0;
    animation: gridMove 24s linear infinite;
    mix-blend-mode: screen;
}

@keyframes gridMove {
    0% { background-position: 0 0, 0 0, 0 0, 0 0, 0 0; }
    100% { background-position: 0 0, 0 0, 0 0, 0 200px, 200px 0; }
}

.hero::after {
    content: '';
    position: absolute;
    inset: -20% 0 -20% 0;
    background: linear-gradient(110deg, rgba(255,255,255,0) 20%, rgba(255,255,255,0.18) 40%, rgba(255,255,255,0) 60%);
    transform: translateX(-100%);
    animation: sweep 12s linear infinite;
    pointer-events: none;
}

@keyframes sweep {
    to { transform: translateX(100%); }
}

.hero-content {
    max-width: 1200px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text {
    color: #ffffff;
}

.hero-title, .hero-subtitle {
    text-shadow: 0 8px 32px rgba(229, 57, 53, 0.45), 0 0 24px rgba(229, 57, 53, 0.30);
}

.hero-title {
    font-size: clamp(1.4rem, 6.2vw, 3.2rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -2px;
    white-space: nowrap;
    word-break: keep-all;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    padding: 16px 32px;
    border-radius: var(--radius-large);
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.hero .btn-primary {
    background: #ffffff;
    color: var(--primary-color);
    border: 1px solid #ffffff;
}
.hero .btn-primary:hover {
    filter: brightness(0.98);
    box-shadow: var(--shadow-medium);
}
.hero .btn-secondary {
    background: transparent;
    color: #ffffff;
    border: 1.5px solid rgba(255, 255, 255, 0.8);
}
.hero .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-primary {
    background: var(--primary-color);
    color: #ffffff;
    border: 1px solid transparent;
}

.btn-primary:hover {
    filter: brightness(1.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-secondary:hover {
    background: rgba(17, 24, 39, 0.06);
    transform: translateY(-2px);
}

/* ===== 浮动卡片动画 ===== */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.floating-cards {
    position: relative;
    width: 300px;
    height: 300px;
}

.card {
    position: absolute;
    background: #ffffff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-medium);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
    transition: all var(--transition-normal);
    animation: float 6s ease-in-out infinite;
    box-shadow: var(--shadow-light);
}

.card-1 {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.card-2 {
    bottom: 20px;
    left: 0;
    animation-delay: 2s;
}

.card-3 {
    bottom: 20px;
    right: 0;
    animation-delay: 4s;
}

.card-icon {
    font-size: 2rem;
}

.card span {
    font-weight: 500;
    white-space: nowrap;
}

.card:hover {
    transform: translateY(-10px) scale(1.05);
    background: rgba(255, 255, 255, 0.2);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    33% {
        transform: translateY(-20px) rotate(1deg);
    }
    66% {
        transform: translateY(-10px) rotate(-1deg);
    }
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    opacity: 0.7;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border: 2px solid currentColor;
    border-left: none;
    border-top: none;
    transform: rotate(45deg);
    animation: scroll-bounce 2s infinite;
}

@keyframes scroll-bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: rotate(45deg) translateY(0);
    }
    40% {
        transform: rotate(45deg) translateY(-10px);
    }
    60% {
        transform: rotate(45deg) translateY(-5px);
    }
}

/* ===== 通用容器和节标题 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    letter-spacing: -1px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 服务区域 ===== */
.services {
    padding: var(--spacing-2xl) 0;
    background: var(--surface);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background: var(--background);
    padding: var(--spacing-xl);
    border-radius: var(--radius-large);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

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

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}

.service-icon {
    margin-bottom: var(--spacing-md);
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.icon-wrapper svg {
    width: 40px;
    height: 40px;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 团队区域 ===== */
.team {
    padding: var(--spacing-2xl) 0;
}

.team-departments {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.department {
    background: var(--surface-elevated);
    padding: var(--spacing-xl);
    border-radius: var(--radius-large);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.department::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 1;
}

.department:hover::after {
    opacity: 0.05;
}

.department:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.department-icon {
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 2;
}

.icon-bg {
    width: 100px;
    height: 100px;
    margin: 0 auto;
    background: linear-gradient(135deg, rgba(229, 57, 53, 0.1), rgba(185, 28, 28, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    border: 2px solid rgba(229, 57, 53, 0.2);
}

.department h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 2;
}

.department p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 2;
}

.department-stats {
    position: relative;
    z-index: 2;
}

.department-stats span {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.department-stats small {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== 作品展示 ===== */
.portfolio {
    padding: var(--spacing-2xl) 0;
    background: var(--surface);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.portfolio-item {
    background: var(--background);
    border-radius: var(--radius-large);
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-light);
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}

.portfolio-image {
    height: 200px;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #E53935 0%, #B91C1C 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    transition: transform var(--transition-normal);
}

.portfolio-item:hover .image-placeholder {
    transform: scale(1.1);
}

.portfolio-info {
    padding: var(--spacing-md);
}

.portfolio-info h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.portfolio-info p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 联系区域 ===== */
.contact {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, #111827, #27272a);
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.contact-info h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.contact-info > p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-medium);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-icon {
    font-size: 1.5rem;
    opacity: 0.9;
}

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

.contact-item p {
    opacity: 0.8;
}

.contact-form {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-large);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-medium);
    color: white;
    font-size: 16px;
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.contact-form .btn-primary {
    width: 100%;
    margin-top: var(--spacing-md);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-logo p {
    opacity: 0.7;
}
.footer .logo-img { height: 44px; background: #ffffff; padding: 6px 8px; border-radius: 8px; display: inline-block; }

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.footer-column h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-column ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    opacity: 0.5;
    font-size: 0.9rem;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .logo-img { height: 44px; }
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: var(--spacing-2xl);
        transition: left var(--transition-normal);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer-links {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 480px) {
    .logo-img { height: 34px; }
    .nav-container {
        padding: 0 var(--spacing-sm);
    }

    .hero {
        padding: 100px var(--spacing-sm) 0;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

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

    .btn-primary,
    .btn-secondary {
        width: 100%;
    }

    .services-grid,
    .team-departments,
    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .floating-cards {
        width: 250px;
        height: 250px;
    }

    .card {
        padding: var(--spacing-sm);
    }
}

/* ===== 滚动条样式 ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface);
}

::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* ===== 指标、流程、FAQ 新增样式 ===== */
.metrics { padding: var(--spacing-2xl) 0; background: var(--surface); }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--spacing-lg); }
.stat-card { background: #fff; border: 1px solid var(--border-light); border-radius: var(--radius-large); padding: var(--spacing-xl); text-align: center; box-shadow: var(--shadow-light); }
.stat-card h3 { font-size: 2rem; color: var(--primary-color); margin-bottom: var(--spacing-xs); }
.stat-card p { color: var(--text-secondary); }

.process { padding: var(--spacing-2xl) 0; }
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--spacing-lg); }
.step {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-large);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-light), inset 0 1px 0 rgba(255,255,255,0.6), inset 0 -28px 60px rgba(229,57,53,0.06);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.step .step-index { width: 36px; height: 36px; border-radius: 50%; background: var(--primary-color); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-weight: 700; margin-bottom: var(--spacing-sm); }
.step h4 { margin-bottom: var(--spacing-xs); }
.step p { color: var(--text-secondary); }

/* 渐变编号（示例用于第1、2步） */
.step.gradient { position: relative; overflow: hidden; }
.step.gradient .step-index { display: none; }
.step.gradient::before {
    content: attr(data-step);
    position: absolute;
    top: 6px;
    left: 14px;
    transform: skewX(-4deg);
    font-size: 82px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -2px;
    color: transparent;
    background: linear-gradient(180deg, #FFF2F2 0%, #FFD2CF 28%, #FF8A82 60%, #E53935 100%);
    -webkit-background-clip: text; background-clip: text;
    opacity: 0.30;
    filter: drop-shadow(0 10px 22px rgba(229, 57, 53, 0.22));
    z-index: 0;
    pointer-events: none;
}
.step.gradient > * { position: relative; z-index: 1; }

/* 底部细红渐变边 */
.step::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: 0; height: 3px;
    background: linear-gradient(90deg, #B01212, #FF3A30, #FF7A6D, #B01212);
    background-size: 200% 100%;
    animation: borderShift 6s linear infinite;
}

@keyframes borderShift { to { background-position: 200% 0; } }

@media (max-width: 768px) {
  .step.gradient::before { font-size: 72px; top: 4px; left: 12px; }
}

@media (max-width: 480px) {
  .step.gradient::before { font-size: 64px; top: 2px; left: 10px; }
}

.faq { padding: var(--spacing-2xl) 0; background: var(--surface); }
.faq-list { max-width: 900px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border-light); border-radius: var(--radius-large); padding: var(--spacing-md) var(--spacing-lg); box-shadow: var(--shadow-light); margin-bottom: var(--spacing-md); }
.faq-item summary { cursor: pointer; font-weight: 600; color: var(--text-primary); }
.faq-item p { color: var(--text-secondary); margin-top: var(--spacing-sm); }

/* 焦点可见性与动效偏好 */
:focus-visible { outline: 3px solid rgba(229, 57, 53, 0.35); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }