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

:root {
    --primary: #1a3b5c;
    --primary-light: #2a5a8c;
    --primary-rgb: 26, 59, 92;
    --accent: #e85d3a;
    --accent-light: #ff7b5a;
    --accent-rgb: 232, 93, 58;
    --bg: #f8f9fc;
    --card-bg: #ffffff;
    --card-bg-rgb: 255, 255, 255;
    --text: #1e2a3a;
    --text-secondary: #5a6e82;
    --border: #e2e8f0;
    --border-rgb: 226, 232, 240;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-blur: 16px;
    --gradient-primary: linear-gradient(135deg, #1a3b5c 0%, #2a5a8c 50%, #3a7abf 100%);
    --gradient-accent: linear-gradient(135deg, #e85d3a 0%, #ff7b5a 100%);
    --gradient-mesh: radial-gradient(at 20% 20%, rgba(232, 93, 58, 0.15) 0%, transparent 50%),
                     radial-gradient(at 80% 80%, rgba(58, 122, 191, 0.15) 0%, transparent 50%),
                     radial-gradient(at 50% 50%, rgba(26, 59, 92, 0.08) 0%, transparent 70%);
}

body.dark-mode {
    --primary: #0f1f2f;
    --primary-light: #1a3b5c;
    --primary-rgb: 15, 31, 47;
    --bg: #0d1117;
    --card-bg: #161b22;
    --card-bg-rgb: 22, 27, 34;
    --text: #e6edf3;
    --text-secondary: #8b949e;
    --border: #30363d;
    --border-rgb: 48, 54, 61;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.6);
    --glass-bg: rgba(22, 27, 34, 0.78);
    --glass-border: rgba(255, 255, 255, 0.08);
    --gradient-primary: linear-gradient(135deg, #0f1f2f 0%, #1a3b5c 50%, #2a5a8c 100%);
    --gradient-mesh: radial-gradient(at 20% 20%, rgba(232, 93, 58, 0.08) 0%, transparent 50%),
                     radial-gradient(at 80% 80%, rgba(58, 122, 191, 0.08) 0%, transparent 50%),
                     radial-gradient(at 50% 50%, rgba(122, 184, 224, 0.05) 0%, transparent 70%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    background-image: var(--gradient-mesh);
    background-attachment: fixed;
    color: var(--text);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

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

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

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

::selection {
    background: rgba(var(--accent-rgb), 0.2);
    color: var(--accent);
}

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

.navbar-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.5px;
    transition: transform var(--transition);
}

.logo:hover {
    transform: scale(1.03);
}

body.dark-mode .logo {
    color: #e6edf3;
}

.logo svg {
    width: 36px;
    height: 36px;
    transition: transform var(--transition);
}

.logo:hover svg {
    transform: rotate(-6deg) scale(1.05);
}

.nav-links {
    display: flex;
    gap: 6px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: background var(--transition), color var(--transition), transform var(--transition);
    position: relative;
}

.nav-links a::after {
    content: "";
    position: absolute;
    bottom: 4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: width var(--transition), left var(--transition);
}

.nav-links a:hover {
    background: var(--bg);
    color: var(--primary);
    transform: translateY(-1px);
}

.nav-links a:hover::after {
    width: 60%;
    left: 20%;
}

body.dark-mode .nav-links a:hover {
    background: #1c2333;
    color: #e6edf3;
}

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

.search-toggle,
.theme-toggle,
.menu-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.search-toggle::before,
.theme-toggle::before,
.menu-toggle::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition);
}

.search-toggle svg,
.theme-toggle svg,
.menu-toggle svg {
    position: relative;
    z-index: 1;
    transition: transform var(--transition);
}

.search-toggle:hover,
.theme-toggle:hover,
.menu-toggle:hover {
    color: #fff;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(var(--accent-rgb), 0.3);
}

.search-toggle:hover::before,
.theme-toggle:hover::before,
.menu-toggle:hover::before {
    opacity: 1;
}

.search-toggle:hover svg,
.theme-toggle:hover svg,
.menu-toggle:hover svg {
    transform: scale(1.1);
}

body.dark-mode .search-toggle:hover,
body.dark-mode .theme-toggle:hover,
body.dark-mode .menu-toggle:hover {
    color: #e6edf3;
}

.menu-toggle {
    display: none;
}

.search-bar {
    display: none;
    padding: 12px 20px;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.search-bar.active {
    display: block;
}

.search-bar-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    gap: 10px;
}

.search-bar input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.95rem;
    background: var(--card-bg);
    color: var(--text);
    outline: none;
    transition: border var(--transition), box-shadow var(--transition);
    font-family: inherit;
}

.search-bar input:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
}

.search-bar button {
    padding: 10px 24px;
    background: var(--gradient-accent);
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    font-family: inherit;
    transition: transform var(--transition), box-shadow var(--transition);
}

.search-bar button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(var(--accent-rgb), 0.35);
}

.search-bar button:active {
    transform: translateY(0);
}

/* ========== 主容器 ========== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ========== 面包屑 ========== */
.breadcrumb {
    padding: 16px 0;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.breadcrumb li + li::before {
    content: "›";
    margin-right: 6px;
    color: var(--text-secondary);
    opacity: 0.5;
}

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

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

/* ========== Banner轮播 ========== */
.banner {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 40px;
    background: var(--gradient-primary);
    min-height: 320px;
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-lg);
}

.banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 20%, rgba(232, 93, 58, 0.25) 0%, transparent 50%),
                radial-gradient(circle at 20% 80%, rgba(58, 122, 191, 0.3) 0%, transparent 50%);
    pointer-events: none;
}

.banner::after {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-20px, 20px) scale(1.1); }
}

.banner-slide {
    display: none;
    width: 100%;
    padding: 50px 40px;
    position: relative;
    z-index: 1;
}

.banner-slide.active {
    display: block;
    animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.banner-slide h2 {
    font-size: 2rem;
    color: #fff;
    margin-bottom: 12px;
    font-weight: 700;
    line-height: 1.3;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.banner-slide p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.88);
    max-width: 620px;
    line-height: 1.7;
}

.banner-dots {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 2;
}

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

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

.banner-dots button.active {
    background: #fff;
    width: 28px;
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* ========== 数字统计 ========== */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.stat-card {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    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 var(--transition-slow);
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(var(--accent-rgb), 0.3);
}

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

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
    transition: color var(--transition);
}

body.dark-mode .stat-number {
    color: #7ab8e0;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========== 通用节段 ========== */
.section {
    margin-bottom: 52px;
}

.section-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
    position: relative;
    padding-bottom: 12px;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 48px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: 2px;
    transition: width var(--transition-slow);
}

.section:hover .section-title::after {
    width: 80px;
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ========== 卡片网格 ========== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
    z-index: 0;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(var(--accent-rgb), 0.25);
}

.card > * {
    position: relative;
    z-index: 1;
}

.card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text);
    transition: color var(--transition);
}

.card:hover h3 {
    color: var(--accent);
}

.card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    font-size: 1.3rem;
    transition: transform var(--transition);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(-5deg);
}

/* ========== 文章列表 ========== */
.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
}

.article-card {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    position: relative;
}

.article-card::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
    border-radius: 0 0 var(--radius) var(--radius);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(var(--accent-rgb), 0.25);
}

.article-card:hover::after {
    transform: scaleX(1);
}

.article-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.article-card h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    line-height: 1.5;
}

.article-card h3 a {
    color: var(--text);
    transition: color var(--transition);
}

.article-card h3 a:hover {
    color: var(--accent);
}

.article-card .excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 12px;
}

.read-more {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--transition), color var(--transition);
}

.read-more:hover {
    color: var(--accent-light);
    gap: 8px;
}

/* ========== FAQ ========== */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq-item {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    transition: box-shadow var(--transition), border-color var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: rgba(var(--accent-rgb), 0.2);
}

.faq-question {
    width: 100%;
    padding: 18px 22px;
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    transition: background var(--transition), color var(--transition);
    font-family: inherit;
    line-height: 1.5;
}

.faq-question:hover {
    background: rgba(var(--primary-rgb), 0.03);
    color: var(--accent);
}

body.dark-mode .faq-question:hover {
    background: #1c2333;
}

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

.faq-item.open .faq-question {
    color: var(--accent);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1), padding 0.35s ease;
    padding: 0 22px;
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.8;
}

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

/* ========== HowTo步骤 ========== */
.howto-steps {
    counter-reset: step;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.howto-step {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius);
    padding: 22px 24px 22px 70px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    position: relative;
    counter-increment: step;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.howto-step:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(var(--accent-rgb), 0.25);
}

.howto-step::before {
    content: counter(step);
    position: absolute;
    left: 22px;
    top: 22px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    transition: transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.3);
}

.howto-step:hover::before {
    transform: scale(1.15);
    box-shadow: 0 6px 18px rgba(var(--accent-rgb), 0.4);
    background: var(--gradient-accent);
}

.howto-step h4 {
    font-size: 1rem;
    margin-bottom: 6px;
    color: var(--text);
    transition: color var(--transition);
}

.howto-step:hover h4 {
    color: var(--accent);
}

.howto-step p {
    font-size: 0.92rem;
    color: var(--text-secondary);
}

/* ========== 企业信息 ========== */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.info-item {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    position: relative;
    overflow: hidden;
}

.info-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-accent);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition-slow);
}

.info-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(var(--accent-rgb), 0.25);
}

.info-item:hover::before {
    transform: scaleY(1);
}

.info-item .label {
    font-size: 0.82rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.info-item .value {
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text);
}

/* ========== 客户评价 ========== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.testimonial {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    position: relative;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.testimonial::before {
    content: "\201C";
    font-size: 3rem;
    color: var(--accent);
    opacity: 0.25;
    position: absolute;
    top: 8px;
    left: 18px;
    line-height: 1;
    font-family: Georgia, serif;
    transition: opacity var(--transition), transform var(--transition);
}

.testimonial:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(var(--accent-rgb), 0.25);
}

.testimonial:hover::before {
    opacity: 0.5;
    transform: scale(1.1);
}

.testimonial p {
    font-size: 0.94rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
    padding-top: 16px;
    line-height: 1.8;
}

.testimonial .author {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
}

.testimonial .role {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--gradient-primary);
    color: rgba(255, 255, 255, 0.8);
    padding: 48px 0 24px;
    margin-top: 40px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(232, 93, 58, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

body.dark-mode .footer {
    background: #0a0f14;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

.footer h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 14px;
    font-weight: 600;
    position: relative;
    padding-bottom: 8px;
}

.footer h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transition: width var(--transition);
}

.footer:hover h4::after {
    width: 40px;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 8px;
}

.footer ul a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: color var(--transition), padding-left var(--transition);
    display: inline-block;
}

.footer ul a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    position: relative;
    z-index: 1;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition);
}

.footer-bottom a:hover {
    color: #fff;
}

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(var(--accent-rgb), 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px) scale(0.9);
    transition: all 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(1.08);
    box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.5);
}

.back-to-top:active {
    transform: translateY(-2px) scale(1.02);
}

/* ========== 滚动动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    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);
}

/* ========== 高亮文字 ========== */
.highlight {
    color: var(--accent);
    font-weight: 600;
    position: relative;
}

.highlight::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 0;
    right: 0;
    height: 6px;
    background: rgba(var(--accent-rgb), 0.15);
    border-radius: 3px;
    z-index: -1;
}

/* ========== 标签 ========== */
.tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    background: rgba(var(--primary-rgb), 0.08);
    color: var(--primary-light);
    transition: background var(--transition), color var(--transition), transform var(--transition);
}

.tag:hover {
    background: rgba(var(--accent-rgb), 0.12);
    color: var(--accent);
    transform: translateY(-1px);
}

body.dark-mode .tag {
    background: rgba(122, 184, 224, 0.12);
    color: #7ab8e0;
}

/* ========== 引用块 ========== */
.quote-block {
    border-left: 4px solid var(--accent);
    padding: 16px 20px;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 20px 0;
    font-size: 0.94rem;
    color: var(--text-secondary);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
}

.quote-block:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-hover);
}

/* ========== 作者信息 ========== */
.author-box {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    margin-top: 24px;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.author-box:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(var(--accent-rgb), 0.25);
}

.author-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
    transition: transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.3);
}

.author-box:hover .author-avatar {
    transform: scale(1.08) rotate(-5deg);
    box-shadow: 0 6px 18px rgba(var(--accent-rgb), 0.4);
}

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

.author-info .desc {
    font-size: 0.84rem;
    color: var(--text-secondary);
}

/* ========== 分类标题 ========== */
.category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.category-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.category-header .line {
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ========== 锚点导航 ========== */
.anchor-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.anchor-nav a {
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.86rem;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.anchor-nav a::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition);
    z-index: -1;
}

.anchor-nav a:hover {
    border-color: transparent;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(var(--accent-rgb), 0.3);
}

.anchor-nav a:hover::before {
    opacity: 1;
}

body.dark-mode .anchor-nav a:hover {
    color: #e6edf3;
}

/* ========== 图片懒加载占位 ========== */
.lazy-img {
    background: linear-gradient(110deg, #eceff4 8%, #f5f7fa 18%, #eceff4 33%);
    background-size: 200% 100%;
    animation: shimmer 1.5s linear infinite;
}

@keyframes shimmer {
    to {
        background-position-x: -200%;
    }
}

.lazy-img.loaded {
    animation: none;
    background: none;
}

/* ========== 首屏核心关键词强调 ========== */
.hero-keyword {
    color: #ffd166;
    font-weight: 700;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-light), var(--primary));
    border-radius: 5px;
    border: 2px solid var(--bg);
    transition: background var(--transition);
}

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

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

/* ========== 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;
    }
}

/* ========== 平板适配 ========== */
@media (max-width: 900px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
        backdrop-filter: blur(var(--glass-blur)) saturate(180%);
        flex-direction: column;
        padding: 12px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        animation: slideDown 0.3s ease;
    }

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

    .nav-links a {
        width: 100%;
        padding: 12px 16px;
    }

    .nav-links a::after {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

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

    .banner-slide {
        padding: 36px 24px;
    }

    .banner-slide h2 {
        font-size: 1.5rem;
    }

    .banner-slide p {
        font-size: 0.98rem;
    }

    .section-title {
        font-size: 1.4rem;
    }

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

/* ========== 手机适配 ========== */
@media (max-width: 520px) {
    body {
        font-size: 15px;
    }

    .container {
        padding: 0 16px;
    }

    .navbar-inner {
        padding: 0 16px;
    }

    .logo {
        font-size: 1.1rem;
    }

    .logo svg {
        width: 30px;
        height: 30px;
    }

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

    .stat-number {
        font-size: 1.8rem;
    }

    .banner {
        border-radius: var(--radius);
        min-height: 260px;
    }

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

    .banner-slide h2 {
        font-size: 1.25rem;
    }

    .banner-slide p {
        font-size: 0.9rem;
    }

    .article-list {
        grid-template-columns: 1fr;
    }

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

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

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

    .search-bar-inner {
        flex-direction: column;
    }

    .search-bar button {
        width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }

    .howto-step {
        padding: 20px 18px 20px 60px;
    }

    .howto-step::before {
        left: 16px;
        top: 20px;
        width: 28px;
        height: 28px;
        font-size: 0.82rem;
    }

    .section-title {
        font-size: 1.25rem;
    }

    .section {
        margin-bottom: 40px;
    }

    .anchor-nav {
        gap: 6px;
    }

    .anchor-nav a {
        padding: 5px 12px;
        font-size: 0.8rem;
    }
}

/* ========== 超小屏 ========== */
@media (max-width: 360px) {
    .banner-slide h2 {
        font-size: 1.1rem;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .nav-actions {
        gap: 6px;
    }

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

/* ========== 打印样式 ========== */
@media print {
    .navbar,
    .back-to-top,
    .banner-dots,
    .search-bar,
    .footer,
    .nav-actions {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .card,
    .article-card,
    .faq-item,
    .testimonial,
    .info-item {
        box-shadow: none;
        border: 1px solid #ddd;
        break-inside: avoid;
    }

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