```css
/* ============================================================
   力盛真 - 免费国产影视平台
   style.css - 完整样式表
   ============================================================ */

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ---------- 主题变量 ---------- */
:root {
    --primary: #1a5f7a;
    --primary-light: #2a7f9e;
    --primary-dark: #0e3f52;
    --primary-glow: rgba(26, 95, 122, 0.35);
    --accent: #e8a87c;
    --accent-light: #f0c4a8;
    --accent-dark: #c48a62;
    --accent-glow: rgba(232, 168, 124, 0.35);
    --gradient-banner: linear-gradient(135deg, #1a5f7a 0%, #2a7f9e 45%, #e8a87c 100%);
    --gradient-banner-2: linear-gradient(120deg, #0e3f52 0%, #1a5f7a 55%, #2a7f9e 100%);
    --gradient-banner-3: linear-gradient(160deg, #2a7f9e 0%, #1a5f7a 50%, #0e3f52 100%);
    --gradient-accent: linear-gradient(135deg, #e8a87c 0%, #f0c4a8 100%);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(248, 249, 250, 0.85));
    --bg: #f8f9fa;
    --bg-alt: #eef2f5;
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.72);
    --bg-glass-border: rgba(255, 255, 255, 0.5);
    --text: #2d3436;
    --text-light: #636e72;
    --text-muted: #8a9499;
    --border: #dfe6e9;
    --border-light: rgba(223, 230, 233, 0.6);
    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.14);
    --shadow-primary: 0 8px 28px rgba(26, 95, 122, 0.22);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 20px;
    --radius-full: 999px;
    --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-slow: 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
}

/* ---------- 暗色模式变量 ---------- */
[data-theme="dark"] {
    --primary: #4a9eb8;
    --primary-light: #6ab8d0;
    --primary-dark: #2a7f9e;
    --primary-glow: rgba(74, 158, 184, 0.3);
    --accent: #e8a87c;
    --accent-light: #c48a62;
    --accent-dark: #a86f4a;
    --accent-glow: rgba(232, 168, 124, 0.25);
    --gradient-banner: linear-gradient(135deg, #0e3f52 0%, #1a5f7a 45%, #c48a62 100%);
    --gradient-banner-2: linear-gradient(120deg, #0a2e3c 0%, #0e3f52 55%, #1a5f7a 100%);
    --gradient-banner-3: linear-gradient(160deg, #1a5f7a 0%, #0e3f52 50%, #0a2e3c 100%);
    --gradient-accent: linear-gradient(135deg, #c48a62 0%, #e8a87c 100%);
    --gradient-card: linear-gradient(145deg, rgba(30, 30, 30, 0.95), rgba(24, 24, 24, 0.85));
    --bg: #121212;
    --bg-alt: #181818;
    --bg-card: #1e1e1e;
    --bg-glass: rgba(30, 30, 30, 0.72);
    --bg-glass-border: rgba(255, 255, 255, 0.08);
    --text: #e0e0e0;
    --text-light: #a0a0a0;
    --text-muted: #707070;
    --border: #333333;
    --border-light: rgba(51, 51, 51, 0.6);
    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.25);
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.5);
    --shadow-primary: 0 8px 28px rgba(74, 158, 184, 0.25);
}

/* ---------- 全局基础 ---------- */
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.8;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition), color var(--transition);
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(circle at 15% 20%, var(--primary-glow) 0%, transparent 45%),
        radial-gradient(circle at 85% 75%, var(--accent-glow) 0%, transparent 45%);
    opacity: 0.5;
    pointer-events: none;
    transition: opacity var(--transition);
}

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

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

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

ul,
ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

input,
button {
    font-family: inherit;
}

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

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

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

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-alt);
}

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

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

/* ---------- 导航栏 ---------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid var(--bg-glass-border);
    box-shadow: var(--shadow-sm);
    transition: background var(--transition), box-shadow var(--transition),
        border-color var(--transition);
}

.navbar:hover {
    box-shadow: var(--shadow-md);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    max-width: 1200px;
    margin: 0 auto;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 0.02em;
    transition: transform var(--transition);
    flex-shrink: 0;
}

.logo:hover {
    transform: scale(1.03);
    color: var(--primary);
}

.logo svg {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 12px var(--primary-glow);
    transition: box-shadow var(--transition), transform var(--transition);
}

.logo:hover svg {
    box-shadow: 0 6px 18px var(--accent-glow);
    transform: rotate(-4deg);
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
    list-style: none;
}

.nav-links a {
    position: relative;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text);
    padding: 4px 0;
    transition: color var(--transition);
}

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

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

.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-shrink: 0;
}

/* 搜索框 */
.search-box {
    position: relative;
}

.search-box input {
    padding: 8px 12px 8px 36px;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--bg);
    color: var(--text);
    font-size: 0.9rem;
    width: 200px;
    transition: width var(--transition), border-color var(--transition),
        box-shadow var(--transition), background var(--transition);
}

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

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    width: 260px;
    box-shadow: 0 0 0 4px var(--primary-glow);
    background: var(--bg-card);
}

.search-box svg {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    fill: var(--text-light);
    pointer-events: none;
    transition: fill var(--transition);
}

.search-box input:focus ~ svg {
    fill: var(--primary);
}

/* 主题切换按钮 */
.theme-toggle {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), border-color var(--transition),
        transform var(--transition), box-shadow var(--transition);
}

.theme-toggle:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: rotate(20deg) scale(1.05);
    box-shadow: 0 4px 14px var(--primary-glow);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    fill: var(--text);
    transition: fill var(--transition);
}

.theme-toggle:hover svg {
    fill: #fff;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}

.mobile-menu-btn:hover {
    background: var(--bg-alt);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
    fill: var(--text);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
    padding: 16px 0;
    font-size: 0.85rem;
    color: var(--text-light);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2px;
}

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

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

.breadcrumb span {
    margin: 0 8px;
    color: var(--text-muted);
}

/* ---------- 轮播 Banner ---------- */
.banner {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    margin: 24px auto;
    max-width: 1200px;
    aspect-ratio: 21 / 9;
    box-shadow: var(--shadow-lg);
    background: var(--gradient-banner);
}

.banner::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
    pointer-events: none;
    z-index: 3;
}

.banner-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transform: scale(1.04);
    transition: opacity 0.9s ease, transform 1.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    will-change: opacity, transform;
}

.banner-slide.active {
    opacity: 1;
    transform: scale(1);
    z-index: 1;
}

.banner-slide svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 4;
    padding: 8px 14px;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.25);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}

.banner-dots button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.85);
    background: transparent;
    cursor: pointer;
    padding: 0;
    transition: background var(--transition), transform var(--transition),
        border-color var(--transition);
}

.banner-dots button:hover {
    transform: scale(1.2);
    border-color: #fff;
}

.banner-dots button.active {
    background: #fff;
    border-color: #fff;
    transform: scale(1.15);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.7);
}

/* ---------- 通用区块 ---------- */
.section {
    padding: 60px 0;
    position: relative;
}

.section:nth-child(even) {
    background: var(--bg-card);
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h1 {
    font-size: 2.2rem;
    line-height: 1.35;
    color: var(--primary);
    margin-bottom: 16px;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.section-header h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
    font-weight: 800;
    letter-spacing: -0.01em;
}

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

.section-header:hover h2::after {
    width: 100px;
}

.section-header p {
    color: var(--text-light);
    max-width: 760px;
    margin: 0 auto;
    font-size: 1rem;
    line-height: 1.85;
}

.section-header p strong {
    color: var(--primary);
    font-weight: 700;
}

/* ---------- 锚点导航 ---------- */
.anchor-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 32px;
}

.anchor-nav a {
    padding: 7px 18px;
    border-radius: var(--radius-full);
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text);
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
}

.anchor-nav a:hover {
    background: var(--gradient-accent);
    color: var(--primary-dark);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--accent-glow);
}

/* ---------- 卡片网格 ---------- */
.grid {
    display: grid;
    gap: 24px;
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

/* ---------- 卡片 ---------- */
.card {
    position: relative;
    background: var(--gradient-card);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition),
        border-color var(--transition);
    overflow: hidden;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.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);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

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

.card h3 {
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 12px;
    font-weight: 700;
    line-height: 1.4;
    transition: color var(--transition);
}

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

.card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 8px;
}

.card p:last-child {
    margin-bottom: 0;
}

.card p strong {
    color: var(--text);
    font-weight: 700;
}

.card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    transition: transform var(--transition);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(-4deg);
}

.card ul {
    list-style: none;
    line-height: 2.2;
}

.card ul li a {
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: padding-left var(--transition), color var(--transition);
}

.card ul li a::before {
    content: '›';
    color: var(--accent);
    font-weight: 700;
    transition: transform var(--transition);
}

.card ul li a:hover {
    padding-left: 6px;
    color: var(--primary);
}

.card ul li a:hover::before {
    transform: translateX(3px);
}

/* ---------- 数字统计 ---------- */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 32px 16px;
    border-radius: var(--radius);
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border: 1px solid var(--bg-glass-border);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition),
        border-color var(--transition);
}

.stat-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.stat-item h3 {
    font-size: 2.6rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: var(--primary);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.stat-item p {
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ---------- 文章列表 ---------- */
.article-list {
    display: grid;
    gap: 20px;
}

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

.article-item::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-accent);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition);
}

.article-item:hover {
    border-color: var(--primary-light);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

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

.article-item h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
    color: var(--text);
    font-weight: 700;
    line-height: 1.5;
    transition: color var(--transition);
}

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

.article-item .meta {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 10px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.article-item .meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.article-item .meta span::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.7;
}

.article-item .meta span:first-child::before {
    display: none;
}

.article-item p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 14px;
    line-height: 1.85;
}

.read-more {
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--primary);
    transition: gap var(--transition), color var(--transition);
}

.read-more svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
    transition: transform var(--transition);
}

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

.read-more:hover svg {
    transform: translateX(2px);
}

/* ---------- FAQ 手风琴 ---------- */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 8px 28px;
    box-shadow: var(--shadow);
}

.faq-item {
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 20px 0;
    background: none;
    border: none;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: color var(--transition);
    line-height: 1.5;
}

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

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

.faq-question:hover svg {
    fill: var(--primary);
}

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

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
    fill: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s ease, padding 0.45s ease;
}

.faq-answer p {
    padding-bottom: 20px;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.85;
}

.faq-item.open .faq-answer {
    max-height: 600px;
}

/* ---------- HowTo 步骤 ---------- */
.howto-steps {
    counter-reset: step;
    max-width: 900px;
    margin: 0 auto;
}

.howto-step {
    position: relative;
    padding-left: 60px;
    padding-bottom: 36px;
    border-left: 2px solid var(--border);
    margin-left: 20px;
    transition: border-color var(--transition);
}

.howto-step:hover {
    border-left-color: var(--primary);
}

.howto-step:last-child {
    border-left-color: transparent;
    padding-bottom: 0;
}

.howto-step::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: -21px;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-banner);
    color: #fff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: 0 4px 14px var(--primary-glow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.howto-step:hover::before {
    transform: scale(1.1);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.howto-step h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--primary);
    font-weight: 700;
}

.howto-step p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.85;
    margin-bottom: 6px;
}

.howto-step p strong {
    color: var(--primary);
    font-weight: 700;
}

/* ---------- 联系我们 ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 24px;
    border-radius: var(--radius);
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border: 1px solid var(--bg-glass-border);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition),
        border-color var(--transition);
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.contact-item svg {
    width: 24px;
    height: 24px;
    fill: var(--primary);
    flex-shrink: 0;
    margin-top: 4px;
    transition: transform var(--transition), fill var(--transition);
}

.contact-item:hover svg {
    transform: scale(1.15);
    fill: var(--accent-dark);
}

.contact-item h4 {
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--text);
    font-weight: 700;
}

.contact-item p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.7;
    word-break: break-word;
}

/* ---------- 作者信息 ---------- */
.author-box {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-radius: var(--radius);
    border: 1px solid var(--bg-glass-border);
    margin-top: 32px;
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition), border-color var(--transition);
}

.author-box:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
}

.author-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: 0 4px 14px var(--primary-glow);
    transition: transform var(--transition);
}

.author-box:hover .author-avatar {
    transform: scale(1.06);
}

.author-avatar svg {
    width: 100%;
    height: 100%;
}

.author-info h4 {
    font-size: 1rem;
    margin-bottom: 6px;
    color: var(--primary);
    font-weight: 700;
}

.author-info p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* ---------- 页脚 ---------- */
.footer {
    position: relative;
    background: var(--primary-dark);
    color: #e0e0e0;
    padding: 60px 0 24px;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 10% 0%, rgba(232, 168, 124, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 90% 100%, rgba(74, 158, 184, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

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

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

.footer h4 {
    color: #fff;
    font-size: 1.05rem;
    margin-bottom: 16px;
    font-weight: 700;
    position: relative;
    padding-bottom: 10px;
}

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

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: #b0b0b0;
    line-height: 1.7;
}

.footer a {
    color: #b0b0b0;
    font-size: 0.9rem;
    transition: color var(--transition), padding-left var(--transition);
    display: inline-block;
}

.footer a:hover {
    color: var(--accent-light);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: #888;
    line-height: 1.8;
}

.footer-bottom p {
    margin-bottom: 8px;
}

.footer-bottom p:last-child {
    margin-bottom: 0;
}

.footer-bottom a {
    color: #aaa;
}

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

/* ---------- 返回顶部 ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--gradient-banner);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: opacity var(--transition), visibility var(--transition),
        transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25), 0 0 0 0 var(--primary-glow);
}

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

.back-to-top:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.3), 0 0 0 6px var(--primary-glow);
}

.back-to-top:active {
    transform: translateY(-2px) scale(0.96);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
    fill: #fff;
}

/* ---------- 滚动动画 ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.8, 0.25, 1),
        transform 0.7s cubic-bezier(0.25, 0.8, 0.25, 1);
    will-change: opacity, transform;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 交错延迟 */
.grid .fade-in:nth-child(1) { transition-delay: 0.02s; }
.grid .fade-in:nth-child(2) { transition-delay: 0.08s; }
.grid .fade-in:nth-child(3) { transition-delay: 0.14s; }
.grid .fade-in:nth-child(4) { transition-delay: 0.2s; }
.grid .fade-in:nth-child(5) { transition-delay: 0.26s; }
.grid .fade-in:nth-child(6) { transition-delay: 0.32s; }

/* ---------- 辅助隐藏 ---------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- 焦点可见性（无障碍） ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ---------- 响应式：平板 ---------- */
@media (max-width: 992px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-glass);
        -webkit-backdrop-filter: blur(18px) saturate(180%);
        backdrop-filter: blur(18px) saturate(180%);
        padding: 20px;
        box-shadow: var(--shadow-lg);
        gap: 16px;
        border-bottom: 1px solid var(--border);
        animation: slideDown 0.3s ease;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .nav-links.mobile-open li {
        width: 100%;
    }

    .nav-links.mobile-open a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px solid var(--border-light);
    }

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

    .search-box input {
        width: 140px;
    }

    .search-box input:focus {
        width: 180px;
    }

    .section {
        padding: 48px 0;
    }

    .section-header h1 {
        font-size: 1.8rem;
    }

    .section-header h2 {
        font-size: 1.6rem;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }
}

/* ---------- 响应式：手机 ---------- */
@media (max-width: 600px) {
    body {
        font-size: 15px;
    }

    .container {
        padding: 0 16px;
    }

    .nav-inner {
        padding: 10px 16px;
    }

    .logo {
        font-size: 1.2rem;
    }

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

    .banner {
        aspect-ratio: 16 / 9;
        margin: 16px;
        border-radius: var(--radius);
    }

    .section {
        padding: 40px 0;
    }

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

    .section-header h1 {
        font-size: 1.5rem;
    }

    .section-header h2 {
        font-size: 1.4rem;
    }

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

    .grid {
        gap: 16px;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 22px;
    }

    .card h3 {
        font-size: 1.1rem;
    }

    .stat-item {
        padding: 24px 12px;
    }

    .stat-item h3 {
        font-size: 1.9rem;
    }

    .search-box {
        display: none;
    }

    .article-item {
        padding: 20px;
    }

    .article-item h3 {
        font-size: 1.05rem;
    }

    .faq-list {
        padding: 4px 18px;
    }

    .faq-question {
        font-size: 0.98rem;
        padding: 16px 0;
    }

    .howto-step {
        padding-left: 48px;
        padding-bottom: 28px;
        margin-left: 16px;
    }

    .howto-step::before {
        width: 34px;
        height: 34px;
        left: -18px;
        font-size: 0.9rem;
    }

    .author-box {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 20px;
    }

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

    .contact-item {
        padding: 18px;
    }

    .footer {
        padding: 40px 0 20px;
    }

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

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

    .anchor-nav a {
        padding: 6px 14px;
        font-size: 0.8rem;
    }
}

/* ---------- 响应式：超小屏 ---------- */
@media (max-width: 380px) {
    .section-header h1 {
        font-size: 1.3rem;
    }

    .section-header h2 {
        font-size: 1.2rem;
    }

    .stat-item h3 {
        font-size: 1.6rem;
    }

    .banner-dots {
        gap: 8px;
        padding: 6px 10px;
    }

    .banner-dots button {
        width: 10px;
        height: 10px;
    }
}

/* ---------- 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;
    }

    .fade-in {
        opacity: 1;
        transform: none;
    }

    .banner-slide {
        transition: opacity 0.01ms;
    }
}

/* ---------- 打印样式 ---------- */
@media print {
    .navbar,
    .banner,
    .back-to-top,
    .theme-toggle,
    .search-box,
    .mobile-menu-btn,
    .footer,
    .anchor-nav {
        display: none !important;
    }

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

    .section {
        padding: 20px 0;
        page-break-inside: avoid;
    }

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

    a {
        color: #000;
        text-decoration: underline;
    }
}
```