```css
/* ============================================================
   嫩草影视 - 在线观看高清影视与直播内容
   865esc.cn
   完整样式表 (Style.css)
   ============================================================ */

/* ---------- 全局颜色变量 亮色模式 ---------- */
:root {
    --bg-body: #F4F7F5;
    --bg-card: #FFFFFF;
    --bg-header: rgba(11, 59, 46, 0.88);
    --bg-footer: #0A2E24;
    --bg-hero: #0B3B2E;
    --bg-section-alt: #E9F0EC;
    --bg-faq: #FFFFFF;
    --bg-tag: #D9E6DF;
    --bg-btn-primary: #0B3B2E;
    --bg-btn-hover: #084A38;
    --bg-input: #FFFFFF;
    --bg-glass: rgba(255, 255, 255, 0.72);
    --bg-glass-dark: rgba(11, 59, 46, 0.55);
    --border-light: #C8D9D0;
    --border-medium: #A3B8AE;
    --border-glass: rgba(255, 255, 255, 0.28);
    --text-primary: #17202A;
    --text-secondary: #1F2937;
    --text-tertiary: #243447;
    --text-muted: #334155;
    --text-inverse: #FFFFFF;
    --text-link: #0B3B2E;
    --text-link-hover: #084A38;
    --text-heading: #0B2E24;
    --text-heading-h2: #0A2E24;
    --text-heading-h3: #1A3A30;
    --text-heading-h4: #1F3F35;
    --text-btn: #FFFFFF;
    --text-nav: #E8F0EC;
    --text-nav-hover: #FFFFFF;
    --text-footer: #D9E6DF;
    --text-footer-heading: #FFFFFF;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-glass: 0 8px 32px rgba(11, 59, 46, 0.18);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --transition: 0.25s ease;
    --gradient-hero: linear-gradient(135deg, #0B3B2E 0%, #0F4A38 45%, #1E6B54 100%);
    --gradient-accent: linear-gradient(135deg, #1E6B54 0%, #7DD3B0 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9) 0%, rgba(233,240,236,0.7) 100%);
    --gradient-btn: linear-gradient(135deg, #0B3B2E 0%, #1E6B54 100%);
    --gradient-btn-hover: linear-gradient(135deg, #084A38 0%, #2A8A6E 100%);
}

/* ---------- 暗黑模式 ---------- */
body.dark {
    --bg-body: #0F1A17;
    --bg-card: #1A2A24;
    --bg-header: rgba(10, 31, 25, 0.88);
    --bg-footer: #071A14;
    --bg-hero: #0A1F19;
    --bg-section-alt: #13261F;
    --bg-faq: #1A2A24;
    --bg-tag: #1F3A30;
    --bg-btn-primary: #1E6B54;
    --bg-btn-hover: #2A8A6E;
    --bg-input: #1A2A24;
    --bg-glass: rgba(26, 42, 36, 0.72);
    --bg-glass-dark: rgba(10, 31, 25, 0.55);
    --border-light: #2A4A3E;
    --border-medium: #3A5A4E;
    --border-glass: rgba(125, 211, 176, 0.22);
    --text-primary: #E5E7EB;
    --text-secondary: #E2E8F0;
    --text-tertiary: #CBD5E1;
    --text-muted: #94A3B8;
    --text-inverse: #0F1A17;
    --text-link: #7DD3B0;
    --text-link-hover: #A7F0D4;
    --text-heading: #FFFFFF;
    --text-heading-h2: #F8FAFC;
    --text-heading-h3: #F1F5F9;
    --text-heading-h4: #E2E8F0;
    --text-btn: #0F1A17;
    --text-nav: #E2E8F0;
    --text-nav-hover: #FFFFFF;
    --text-footer: #CBD5E1;
    --text-footer-heading: #FFFFFF;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.45);
    --gradient-hero: linear-gradient(135deg, #0A1F19 0%, #0F2E24 45%, #1E6B54 100%);
    --gradient-accent: linear-gradient(135deg, #1E6B54 0%, #7DD3B0 100%);
    --gradient-card: linear-gradient(145deg, rgba(26,42,36,0.9) 0%, rgba(19,38,31,0.7) 100%);
    --gradient-btn: linear-gradient(135deg, #1E6B54 0%, #2A8A6E 100%);
    --gradient-btn-hover: linear-gradient(135deg, #2A8A6E 0%, #3AA88A 100%);
}

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

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

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

/* ---------- 标题层级 ---------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.75em;
}

h1 {
    font-size: 2.5rem;
    color: var(--text-heading);
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2rem;
    color: var(--text-heading-h2);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-light);
    position: relative;
}

h2::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 64px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: 3px;
}

h3 {
    font-size: 1.5rem;
    color: var(--text-heading-h3);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

h4 {
    font-size: 1.25rem;
    color: var(--text-heading-h4);
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-muted { color: var(--text-muted); }

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

a:hover {
    color: var(--text-link-hover);
    text-decoration: underline;
}

ul, ol {
    padding-left: 1.25rem;
}

img, svg {
    max-width: 100%;
    vertical-align: middle;
}

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

/* ---------- 头部导航 (毛玻璃) ---------- */
.site-header {
    background: var(--bg-header);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    backdrop-filter: blur(18px) saturate(160%);
    color: var(--text-nav);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
    border-bottom: 1px solid var(--border-glass);
    transition: background var(--transition), box-shadow var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    gap: 16px;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-inverse);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: transform var(--transition);
}

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

.logo svg {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(30, 107, 84, 0.4);
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--text-nav);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 6px 2px;
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
    position: relative;
}

.nav-links a:hover {
    color: var(--text-nav-hover);
    border-bottom-color: var(--text-nav-hover);
    text-decoration: none;
}

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

.search-box {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.12);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-radius: 30px;
    padding: 4px 12px;
    border: 1px solid var(--border-glass);
    transition: background var(--transition), box-shadow var(--transition);
}

.search-box:focus-within {
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 0 3px rgba(125, 211, 176, 0.25);
}

.search-box input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-nav);
    font-size: 0.9rem;
    padding: 6px 4px;
    width: 140px;
    font-family: inherit;
}

.search-box input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.search-box button {
    background: transparent;
    border: none;
    color: var(--text-nav);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
    transition: transform var(--transition);
}

.search-box button:hover {
    transform: scale(1.15);
}

.dark-toggle {
    background: rgba(255, 255, 255, 0.12);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-glass);
    color: var(--text-nav);
    border-radius: 30px;
    padding: 6px 14px;
    cursor: pointer;
    font-size: 0.85rem;
    font-family: inherit;
    transition: background var(--transition), color var(--transition), transform var(--transition);
    white-space: nowrap;
}

.dark-toggle:hover {
    background: rgba(255, 255, 255, 0.24);
    color: var(--text-nav-hover);
    transform: translateY(-1px);
}

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: 1px solid var(--border-glass);
    color: var(--text-nav);
    font-size: 1.4rem;
    padding: 4px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background var(--transition);
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
    padding: 12px 0;
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

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

.breadcrumb span {
    margin: 0 6px;
    color: var(--text-muted);
}

/* ---------- 英雄区 (渐变 + 光斑) ---------- */
.hero {
    background: var(--gradient-hero);
    color: var(--text-inverse);
    padding: 70px 0 60px;
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.hero::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, rgba(125, 211, 176, 0.35) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: floatGlow 12s ease-in-out infinite;
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -40%;
    left: -5%;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(30, 107, 84, 0.45) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: floatGlow 15s ease-in-out infinite reverse;
}

@keyframes floatGlow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 780px;
}

.hero h1 {
    color: #FFFFFF;
    font-size: 2.8rem;
    margin-bottom: 16px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

.hero p {
    color: #E8F0EC;
    font-size: 1.15rem;
    margin-bottom: 24px;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.25);
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.14);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    color: #FFFFFF;
    padding: 7px 18px;
    border-radius: 30px;
    font-size: 0.9rem;
    margin-bottom: 22px;
    border: 1px solid var(--border-glass);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15); }
    50% { box-shadow: 0 4px 24px rgba(125, 211, 176, 0.4); }
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-top: 36px;
    flex-wrap: wrap;
}

.hero-stat-item {
    text-align: left;
}

.hero-stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: #FFFFFF;
    line-height: 1.2;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.3));
}

.hero-stat-label {
    font-size: 0.9rem;
    color: #D9E6DF;
}

/* ---------- 轮播 (圆角 + 毛玻璃) ---------- */
.banner-carousel {
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    backdrop-filter: blur(20px) saturate(160%);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin: 36px 0;
    box-shadow: var(--shadow-glass);
    border: 1px solid var(--border-glass);
    position: relative;
}

.carousel-slide {
    display: none;
    padding: 36px 32px;
    background: transparent;
}

.carousel-slide.active {
    display: block;
    animation: slideFade 0.6s ease;
}

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

.carousel-slide h3 {
    color: var(--text-heading-h3);
    margin-top: 0;
}

.carousel-slide p {
    color: var(--text-secondary);
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 16px;
    background: var(--bg-section-alt);
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-medium);
    border: none;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition), width var(--transition);
}

.carousel-dot:hover {
    transform: scale(1.2);
}

.carousel-dot.active {
    background: var(--bg-btn-primary);
    width: 28px;
    border-radius: 6px;
}

/* ---------- 通用卡片 (圆角 + hover) ---------- */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 26px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s ease;
}

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

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

.card h3 {
    margin-top: 0;
    color: var(--text-heading-h3);
}

.card p {
    color: var(--text-secondary);
}

/* ---------- 网格布局 ---------- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

/* ---------- 标签 ---------- */
.tag {
    display: inline-block;
    background: var(--bg-tag);
    color: var(--text-tertiary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin: 2px 4px 2px 0;
    transition: background var(--transition), color var(--transition);
}

.tag:hover {
    background: var(--bg-btn-primary);
    color: var(--text-btn);
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-block;
    padding: 11px 26px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: background var(--transition), color var(--transition),
        box-shadow var(--transition), transform var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-btn);
    color: var(--text-btn);
    box-shadow: 0 4px 14px rgba(11, 59, 46, 0.25);
}

.btn-primary:hover {
    background: var(--gradient-btn-hover);
    color: var(--text-btn);
    text-decoration: none;
    box-shadow: 0 8px 24px rgba(11, 59, 46, 0.35);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    background: transparent;
    color: var(--text-link);
    border: 2px solid var(--text-link);
}

.btn-outline:hover {
    background: var(--text-link);
    color: var(--text-inverse);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(11, 59, 46, 0.25);
}

/* ---------- 文章列表 ---------- */
.article-item {
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    padding: 22px;
    border: 1px solid var(--border-light);
    transition: box-shadow var(--transition), transform var(--transition);
}

.article-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.article-item h4 {
    margin-top: 0;
    color: var(--text-heading-h4);
}

.article-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.article-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.article-readmore {
    font-weight: 600;
    color: var(--text-link);
    font-size: 0.9rem;
    display: inline-block;
    margin-top: 8px;
    transition: transform var(--transition), color var(--transition);
}

.article-readmore:hover {
    transform: translateX(4px);
    text-decoration: none;
}

/* ---------- FAQ (圆角 + 展开动画) ---------- */
.faq-item {
    background: var(--bg-faq);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    transition: box-shadow var(--transition), border-color var(--transition);
}

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

.faq-question {
    padding: 18px 22px;
    font-weight: 600;
    color: var(--text-heading-h4);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    background: var(--bg-card);
    transition: background var(--transition);
    user-select: none;
}

.faq-question:hover {
    background: var(--bg-section-alt);
}

.faq-answer {
    padding: 0 22px;
    color: var(--text-secondary);
    display: none;
    background: var(--bg-card);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-answer.open {
    display: block;
    padding: 0 22px 18px;
    max-height: 600px;
    animation: faqOpen 0.4s ease;
}

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

.faq-icon {
    font-size: 1.3rem;
    color: var(--text-link);
    transition: transform var(--transition), color var(--transition);
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-tag);
}

.faq-icon.open {
    transform: rotate(45deg);
    background: var(--bg-btn-primary);
    color: var(--text-btn);
}

/* ---------- 表格 ---------- */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

th, td {
    padding: 13px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

th {
    background: var(--bg-section-alt);
    color: var(--text-heading-h4);
    font-weight: 700;
}

td {
    color: var(--text-secondary);
}

tr:last-child td {
    border-bottom: none;
}

tbody tr {
    transition: background var(--transition);
}

tbody tr:hover {
    background: var(--bg-section-alt);
}

/* ---------- 表单 ---------- */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-heading-h4);
    margin-bottom: 6px;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 11px 15px;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--text-link);
    box-shadow: 0 0 0 4px rgba(11, 59, 46, 0.12);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ---------- 页脚 ---------- */
.site-footer {
    background: var(--bg-footer);
    color: var(--text-footer);
    padding: 52px 0 24px;
    margin-top: 60px;
    position: relative;
}

.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-accent);
}

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

.footer-col h4 {
    color: var(--text-footer-heading);
    font-size: 1.05rem;
    margin-bottom: 16px;
    margin-top: 0;
}

.footer-col p,
.footer-col li {
    color: var(--text-footer);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.footer-col ul {
    list-style: none;
    padding-left: 0;
}

.footer-col a {
    color: var(--text-footer);
    font-size: 0.9rem;
    transition: color var(--transition), padding-left var(--transition);
}

.footer-col a:hover {
    color: var(--text-footer-heading);
    text-decoration: underline;
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: 20px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-footer);
}

.footer-bottom p {
    color: var(--text-footer);
    margin-bottom: 6px;
}

/* ---------- 返回顶部 ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--gradient-btn);
    color: var(--text-btn);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 1.4rem;
    box-shadow: var(--shadow-lg);
    display: none;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), transform var(--transition), opacity var(--transition);
    z-index: 999;
}

.back-to-top:hover {
    background: var(--gradient-btn-hover);
    transform: translateY(-4px) scale(1.05);
}

.back-to-top.show {
    display: flex;
    animation: popIn 0.3s ease;
}

@keyframes popIn {
    from { opacity: 0; transform: scale(0.6); }
    to { opacity: 1; transform: scale(1); }
}

/* ---------- 滚动动画 ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: opacity, transform;
}

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

/* ---------- 内部锚点导航 ---------- */
.anchor-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 18px 0;
    margin-bottom: 8px;
}

.anchor-nav a {
    background: var(--bg-tag);
    color: var(--text-tertiary);
    padding: 7px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background var(--transition), color var(--transition), transform var(--transition);
}

.anchor-nav a:hover {
    background: var(--gradient-btn);
    color: var(--text-btn);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(11, 59, 46, 0.25);
}

/* ---------- 区块间距 ---------- */
.section {
    padding: 48px 0;
}

.section-alt {
    background: var(--bg-section-alt);
    position: relative;
}

/* ---------- 公司信息 ---------- */
.info-list {
    list-style: none;
    padding-left: 0;
}

.info-list li {
    padding: 7px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    border-bottom: 1px dashed var(--border-light);
}

.info-list li:last-child {
    border-bottom: none;
}

.info-list li strong {
    color: var(--text-heading-h4);
    margin-right: 6px;
}

.info-list li a {
    color: var(--text-link);
}

/* ---------- 引用 ---------- */
blockquote {
    border-left: 4px solid var(--text-link);
    padding: 14px 22px;
    margin: 16px 0;
    background: var(--bg-section-alt);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-style: italic;
}

/* ---------- 步骤列表 ---------- */
.step-list {
    counter-reset: step;
    list-style: none;
    padding-left: 0;
}

.step-list li {
    position: relative;
    padding-left: 48px;
    margin-bottom: 18px;
    color: var(--text-secondary);
    min-height: 32px;
}

.step-list li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 32px;
    height: 32px;
    background: var(--gradient-btn);
    color: var(--text-btn);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: 0 4px 12px rgba(11, 59, 46, 0.25);
}

/* ---------- 高亮框 ---------- */
.highlight-box {
    background: var(--bg-section-alt);
    border-left: 4px solid var(--text-link);
    padding: 18px 22px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 16px 0;
}

.highlight-box p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* ---------- 客户评价 ---------- */
.testimonial {
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    padding: 22px;
    border: 1px solid var(--border-light);
    transition: box-shadow var(--transition), transform var(--transition);
    position: relative;
}

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

.testimonial:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.testimonial:hover::before {
    color: var(--text-link);
}

.testimonial-text {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 12px;
}

.testimonial-author {
    font-weight: 600;
    color: var(--text-heading-h4);
    font-size: 0.9rem;
}

/* ---------- 图片占位 ---------- */
.img-placeholder {
    width: 100%;
    height: 200px;
    background: var(--gradient-accent);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-size: 0.9rem;
    margin-bottom: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    position: relative;
}

.img-placeholder::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    pointer-events: none;
}

.img-placeholder svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ---------- 移动端 768px ---------- */
@media (max-width: 768px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    h4 { font-size: 1.1rem; }

    .hero {
        padding: 48px 0 40px;
    }
    .hero h1 { font-size: 1.9rem; }
    .hero p { font-size: 1rem; }
    .hero-stats { gap: 20px; margin-top: 28px; }
    .hero-stat-number { font-size: 1.5rem; }

    .nav-links { display: none; }
    .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        width: 100%;
        padding: 12px 0;
        gap: 4px;
        animation: mobileMenuOpen 0.3s ease;
    }
    .nav-links.mobile-open a {
        padding: 12px 4px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        width: 100%;
    }
    .nav-links.mobile-open a:last-child {
        border-bottom: none;
    }
    .mobile-menu-btn { display: block; }

    .search-box input { width: 100px; }
    .header-inner { gap: 10px; }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
    }

    .section { padding: 36px 0; }
    .card { padding: 22px; }
    .carousel-slide { padding: 28px 22px; }
}

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

/* ---------- 移动端 480px ---------- */
@media (max-width: 480px) {
    .container { padding: 0 14px; }

    .hero { padding: 40px 0 32px; }
    .hero h1 { font-size: 1.6rem; }
    .hero p { font-size: 0.95rem; }
    .hero-stats { gap: 16px; }
    .hero-stat-number { font-size: 1.35rem; }
    .hero-stat-label { font-size: 0.8rem; }
    .hero-badge { font-size: 0.8rem; padding: 6px 14px; }

    .search-box { display: none; }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .carousel-slide { padding: 24px 18px; }
    .carousel-slide h3 { font-size: 1.15rem; }

    .card { padding: 20px; }
    .article-item { padding: 18px; }
    .testimonial { padding: 18px; }

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

    .back-to-top {
        bottom: 16px;
        right: 16px;
        width: 42px;
        height: 42px;
    }

    .anchor-nav {
        gap: 8px;
    }
    .anchor-nav a {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
}

/* ---------- 无障碍与减少动画 ---------- */
@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;
    }
}

/* ---------- 焦点可见性 ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--text-link);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ---------- 选中文本 ---------- */
::selection {
    background: var(--bg-btn-primary);
    color: var(--text-btn);
}

::-moz-selection {
    background: var(--bg-btn-primary);
    color: var(--text-btn);
}

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

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

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

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

/* ---------- 打印样式 ---------- */
@media print {
    .site-header,
    .back-to-top,
    .banner-carousel,
    .hero::before,
    .hero::after {
        display: none !important;
    }
    body {
        background: #FFFFFF;
        color: #000000;
    }
    .card {
        box-shadow: none;
        border: 1px solid #CCCCCC;
    }
}
```