:root {
    --brand-primary: #1f2a3a;
    --brand-secondary: #2d4a6b;
    --brand-accent: #e67e22;
    --brand-accent-hover: #d35400;
    --brand-light: #f8f9fc;
    --brand-dark: #0f1419;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --bg-body: #f1f5f9;
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.35);
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.09);
    --shadow-lg: 0 16px 44px rgba(15, 23, 42, 0.14);
    --shadow-glow: 0 8px 28px rgba(230, 126, 34, 0.28);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-banner: linear-gradient(135deg, #1f2a3a 0%, #2d4a6b 55%, #3d5a80 100%);
    --gradient-accent: linear-gradient(135deg, #e67e22 0%, #f39c12 100%);
    --gradient-avatar: linear-gradient(135deg, #2d4a6b 0%, #e67e22 100%);
}

body.dark-mode {
    --brand-primary: #0f1419;
    --brand-secondary: #1a2a3a;
    --brand-accent: #f39c12;
    --brand-accent-hover: #e67e22;
    --brand-light: #1e293b;
    --brand-dark: #f8f9fc;
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --card-bg: #1e293b;
    --bg-body: #0f172a;
    --glass-bg: rgba(30, 41, 59, 0.72);
    --glass-border: rgba(148, 163, 184, 0.18);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 44px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 8px 28px rgba(243, 156, 18, 0.22);
    --gradient-banner: linear-gradient(135deg, #0b1220 0%, #16263b 55%, #1e3a5f 100%);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

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

a {
    color: inherit;
}

::selection {
    background: var(--brand-accent);
    color: #ffffff;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 6px;
    border: 2px solid var(--bg-body);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--brand-accent);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============ 吸顶导航（毛玻璃） ============ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    transition: background 0.4s ease, box-shadow var(--transition), border-color 0.4s ease;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    flex-shrink: 0;
}

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

.logo svg {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo:hover svg {
    transform: rotate(-8deg) scale(1.06);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 28px;
    align-items: center;
}

.nav-menu a {
    display: inline-block;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition);
    position: relative;
    padding: 4px 0;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
    color: var(--brand-accent);
}

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

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

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    padding: 6px 8px 6px 16px;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.search-box:focus-within {
    border-color: var(--brand-accent);
    background: var(--card-bg);
    box-shadow: 0 0 0 4px rgba(230, 126, 34, 0.12);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.9rem;
    color: var(--text-primary);
    width: 140px;
    font-family: inherit;
}

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

.search-box button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: 50%;
    transition: color var(--transition), background var(--transition);
}

.search-box button:hover {
    color: var(--brand-accent);
    background: rgba(230, 126, 34, 0.1);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: 8px;
    border-radius: var(--radius-xs);
    transition: background var(--transition);
}

.menu-toggle:hover {
    background: rgba(230, 126, 34, 0.1);
}

.menu-toggle svg {
    width: 26px;
    height: 26px;
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--brand-accent);
    color: var(--brand-accent);
    transform: rotate(25deg);
    box-shadow: var(--shadow-glow);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

/* ============ 面包屑 ============ */
.breadcrumb {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    transition: background 0.4s ease, border-color 0.4s ease;
}

.breadcrumb ol {
    display: flex;
    list-style: none;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text-muted);
    flex-wrap: wrap;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: '/';
    margin-left: 8px;
    color: var(--text-muted);
    opacity: 0.6;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition);
}

.breadcrumb a:hover {
    color: var(--brand-accent);
}

/* ============ Banner 轮播（渐变 + 毛玻璃装饰） ============ */
.banner {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    margin: 28px 0;
    background: var(--gradient-banner);
    min-height: 340px;
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-lg);
    isolation: isolate;
}

.banner::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -10%;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(230, 126, 34, 0.28) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.banner::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -8%;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(61, 90, 128, 0.45) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.banner-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
    display: flex;
    align-items: center;
    padding: 48px 40px;
    z-index: 1;
}

.banner-slide.active {
    opacity: 1;
    position: relative;
}

.banner-content {
    max-width: 620px;
    color: #ffffff;
}

.banner-content h1 {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
}

.banner-content h1 span {
    color: var(--brand-accent);
    position: relative;
    white-space: nowrap;
}

.banner-content p {
    font-size: 1.1rem;
    opacity: 0.92;
    margin-bottom: 24px;
    line-height: 1.8;
    text-shadow: 0 1px 12px rgba(0, 0, 0, 0.2);
}

.banner-dots {
    position: absolute;
    bottom: 22px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.banner-dots button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
}

.banner-dots button:hover {
    background: rgba(255, 255, 255, 0.7);
}

.banner-dots button.active {
    background: #ffffff;
    width: 28px;
    border-radius: 5px;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.6);
}

/* ============ 数字动画区域 ============ */
.stats-section {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 32px 0;
}

.stat-card {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--glass-border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(230, 126, 34, 0.35);
}

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

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: var(--brand-accent);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ============ 通用区块 ============ */
.section {
    margin: 56px 0;
    scroll-margin-top: 90px;
}

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

.section-header h2 {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
    letter-spacing: -0.02em;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    border-radius: 2px;
    background: var(--gradient-accent);
}

.section-header p {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 680px;
    margin: 20px auto 0;
    line-height: 1.8;
}

/* ============ 卡片网格 ============ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background 0.4s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(230, 126, 34, 0.06) 0%, transparent 55%);
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: var(--brand-accent);
}

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

.card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    position: relative;
}

.card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    position: relative;
}

.card .icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(230, 126, 34, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), background var(--transition);
}

.card:hover .icon-wrap {
    transform: scale(1.1) rotate(-6deg);
    background: rgba(230, 126, 34, 0.18);
}

.card .icon-wrap svg {
    width: 26px;
    height: 26px;
    color: var(--brand-accent);
}

/* ============ 文章列表 ============ */
.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.article-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 26px 24px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background 0.4s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.article-item::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-accent);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(230, 126, 34, 0.4);
}

.article-item:hover::after {
    transform: scaleY(1);
}

.article-meta {
    display: flex;
    gap: 12px;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.article-meta span:first-child::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--brand-accent);
    margin-right: 6px;
    vertical-align: middle;
}

.article-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
    line-height: 1.5;
    transition: color var(--transition);
}

.article-item:hover h3 {
    color: var(--brand-accent);
}

.article-item p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.8;
    flex: 1;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    color: var(--brand-accent);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: gap var(--transition), color var(--transition);
    align-self: flex-start;
}

.read-more:hover {
    gap: 12px;
    color: var(--brand-accent-hover);
}

.read-more svg {
    transition: transform var(--transition);
}

.read-more:hover svg {
    transform: translateX(3px);
}

/* ============ FAQ ============ */
.faq-list {
    max-width: 820px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition), background 0.4s ease;
}

.faq-item:hover {
    border-color: var(--brand-accent);
    box-shadow: var(--shadow-sm);
}

.faq-item.open {
    border-color: var(--brand-accent);
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    gap: 12px;
    font-family: inherit;
    line-height: 1.6;
    transition: color var(--transition), background var(--transition);
}

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

.faq-question svg {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: transform var(--transition), color var(--transition);
    flex-shrink: 0;
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
    color: var(--brand-accent);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 22px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    max-height: 600px;
    padding: 0 22px 20px;
}

/* ============ HowTo 步骤 ============ */
.howto-steps {
    max-width: 820px;
    margin: 0 auto;
    counter-reset: step;
}

.howto-step {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
    position: relative;
    padding-left: 0;
}

.howto-step:not(:last-child)::before {
    content: '';
    position: absolute;
    left: 21px;
    top: 48px;
    bottom: -28px;
    width: 2px;
    background: linear-gradient(180deg, var(--brand-accent) 0%, var(--border-color) 100%);
    opacity: 0.4;
}

.howto-step-num {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
    counter-increment: step;
    box-shadow: var(--shadow-glow);
    transition: transform var(--transition);
    position: relative;
    z-index: 1;
}

.howto-step:hover .howto-step-num {
    transform: scale(1.1);
}

.howto-step-num::before {
    content: counter(step);
}

.howto-step-content h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.howto-step-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============ 团队 / 作者 ============ */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.team-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 30px 22px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background 0.4s ease;
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(230, 126, 34, 0.4);
}

.team-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: var(--gradient-avatar);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1.8rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.team-card:hover .team-avatar {
    transform: scale(1.08) rotate(-5deg);
}

.team-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.team-card .role {
    font-size: 0.88rem;
    color: var(--brand-accent);
    font-weight: 600;
    margin-bottom: 10px;
}

.team-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ============ 客户评价 ============ */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.testimonial-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 32px 26px 26px;
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background 0.4s ease;
    overflow: hidden;
}

.testimonial-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(230, 126, 34, 0.35);
}

.testimonial-card::before {
    content: '"';
    font-size: 4.5rem;
    color: var(--brand-accent);
    opacity: 0.15;
    position: absolute;
    top: 4px;
    left: 20px;
    font-family: Georgia, "Times New Roman", serif;
    line-height: 1;
    transition: opacity var(--transition), transform var(--transition);
}

.testimonial-card:hover::before {
    opacity: 0.28;
    transform: scale(1.1);
}

.testimonial-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 18px;
    position: relative;
    z-index: 1;
}

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

.testimonial-author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-avatar);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.testimonial-author-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.testimonial-author-info span {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* ============ 新闻中心 ============ */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 820px;
    margin: 0 auto;
}

.news-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background 0.4s ease;
}

.news-item:hover {
    transform: translateX(6px);
    border-color: var(--brand-accent);
    box-shadow: var(--shadow-md);
}

.news-date {
    flex-shrink: 0;
    text-align: center;
    min-width: 64px;
    padding: 8px 0;
    background: var(--bg-body);
    border-radius: var(--radius-xs);
    transition: background var(--transition);
}

.news-item:hover .news-date {
    background: rgba(230, 126, 34, 0.1);
}

.news-date .day {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--brand-accent);
    line-height: 1.2;
}

.news-date .month {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.news-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
    transition: color var(--transition);
}

.news-item:hover .news-content h3 {
    color: var(--brand-accent);
}

.news-content p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ============ 联系信息 ============ */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.contact-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 30px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background 0.4s ease;
}

.contact-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(230, 126, 34, 0.4);
}

.contact-card .icon-wrap {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(230, 126, 34, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), background var(--transition);
}

.contact-card:hover .icon-wrap {
    transform: scale(1.12);
    background: rgba(230, 126, 34, 0.18);
}

.contact-card .icon-wrap svg {
    width: 28px;
    height: 28px;
    color: var(--brand-accent);
}

.contact-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.contact-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.contact-card a {
    color: var(--brand-accent);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition);
    word-break: break-all;
}

.contact-card a:hover {
    color: var(--brand-accent-hover);
    text-decoration: underline;
}

/* ============ 页脚 ============ */
.footer {
    background: var(--brand-primary);
    color: #cbd5e1;
    padding: 56px 0 24px;
    margin-top: 64px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(230, 126, 34, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: #ffffff;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 28px;
    height: 2px;
    border-radius: 2px;
    background: var(--gradient-accent);
}

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

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition), padding-left var(--transition);
    display: inline-block;
}

.footer-col ul li a:hover {
    color: var(--brand-accent);
    padding-left: 4px;
}

.footer-col p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: #94a3b8;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.85rem;
    color: #94a3b8;
}

.footer-bottom a {
    color: #94a3b8;
    text-decoration: none;
    transition: color var(--transition);
}

.footer-bottom a:hover {
    color: var(--brand-accent);
}

/* ============ 返回顶部 ============ */
.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.9);
    transition: opacity var(--transition), visibility var(--transition), transform var(--transition), box-shadow var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.back-to-top:hover {
    transform: translateY(-4px) scale(1.06);
    box-shadow: 0 18px 40px rgba(230, 126, 34, 0.45);
}

.back-to-top:active {
    transform: translateY(-2px) scale(0.98);
}

.back-to-top svg {
    width: 22px;
    height: 22px;
}

/* ============ 滚动动画 ============ */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

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

/* ============ 焦点可见性（无障碍） ============ */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--brand-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ============ 响应式：平板 ============ */
@media (max-width: 900px) {
    .nav-menu {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        -webkit-backdrop-filter: saturate(180%) blur(16px);
        backdrop-filter: saturate(180%) blur(16px);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--glass-border);
        box-shadow: var(--shadow-md);
        transform: translateY(-130%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 999;
        align-items: flex-start;
    }

    .nav-menu.open {
        transform: translateY(0);
    }

    .nav-menu a {
        width: 100%;
        padding: 8px 4px;
        font-size: 1rem;
    }

    .menu-toggle {
        display: flex;
    }

    .search-box {
        display: none;
    }

    .banner {
        min-height: 300px;
    }

    .banner-slide {
        padding: 36px 28px;
    }

    .banner-content h1 {
        font-size: 1.7rem;
    }

    .banner-content p {
        font-size: 0.95rem;
    }

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

    .section-header h2 {
        font-size: 1.5rem;
    }

    .section {
        margin: 44px 0;
    }

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

    .howto-step:not(:last-child)::before {
        left: 19px;
        top: 44px;
        bottom: -24px;
    }
}

/* ============ 响应式：手机 ============ */
@media (max-width: 480px) {
    body {
        font-size: 15px;
    }

    .container {
        padding: 0 16px;
    }

    .navbar .container {
        height: 62px;
    }

    .logo {
        font-size: 1.2rem;
    }

    .logo svg {
        width: 32px;
        height: 32px;
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
    }

    .stats-section {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .stat-card {
        padding: 22px 16px;
    }

    .stat-number {
        font-size: 1.9rem;
    }

    .banner {
        min-height: 280px;
        border-radius: var(--radius-sm);
    }

    .banner-slide {
        padding: 28px 20px;
    }

    .banner-content h1 {
        font-size: 1.35rem;
    }

    .banner-content p {
        font-size: 0.9rem;
        margin-bottom: 16px;
    }

    .section {
        margin: 36px 0;
    }

    .section-header {
        margin-bottom: 28px;
    }

    .section-header h2 {
        font-size: 1.3rem;
    }

    .section-header p {
        font-size: 0.92rem;
    }

    .card,
    .article-item,
    .team-card,
    .testimonial-card,
    .contact-card {
        padding: 22px 18px;
    }

    .card-grid,
    .article-list,
    .team-grid,
    .testimonial-grid,
    .contact-grid {
        gap: 16px;
    }

    .faq-question {
        padding: 15px 16px;
        font-size: 0.95rem;
    }

    .faq-answer {
        padding: 0 16px;
        font-size: 0.9rem;
    }

    .faq-item.open .faq-answer {
        padding: 0 16px 16px;
    }

    .howto-step {
        gap: 14px;
        margin-bottom: 22px;
    }

    .howto-step-num {
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }

    .howto-step:not(:last-child)::before {
        left: 18px;
        top: 40px;
        bottom: -22px;
    }

    .howto-step-content h4 {
        font-size: 1rem;
    }

    .howto-step-content p {
        font-size: 0.9rem;
    }

    .news-item {
        flex-direction: column;
        gap: 12px;
        padding: 16px 18px;
    }

    .news-item:hover {
        transform: translateY(-3px);
    }

    .news-date {
        display: flex;
        gap: 8px;
        align-items: center;
        padding: 6px 12px;
        min-width: auto;
    }

    .news-date .day {
        font-size: 1.1rem;
    }

    .footer {
        padding: 40px 0 20px;
        margin-top: 48px;
    }

    .footer-grid {
        gap: 24px;
        margin-bottom: 28px;
    }

    .back-to-top {
        bottom: 18px;
        right: 18px;
        width: 44px;
        height: 44px;
    }

    .breadcrumb {
        padding: 10px 0;
    }

    .breadcrumb ol {
        font-size: 0.82rem;
    }
}

/* ============ 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;
        scroll-behavior: auto !important;
    }

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

/* ============ 高对比度 / 打印 ============ */
@media print {
    .navbar,
    .back-to-top,
    .banner-dots,
    .theme-toggle,
    .menu-toggle {
        display: none !important;
    }

    body {
        background: #ffffff;
        color: #000000;
    }

    .card,
    .article-item,
    .faq-item {
        box-shadow: none;
        border: 1px solid #cccccc;
    }
}