```css
/* ===== 精东影视 全站样式 ===== */
:root {
    --bg-light: #f0f4f8;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-solid: #ffffff;
    --bg-deep: #1a2634;
    --bg-deep-2: #243447;
    --text-primary: #1e293b;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --accent: #2b4f7c;
    --accent-light: #3a6a9f;
    --accent-glow: rgba(43, 79, 124, 0.2);
    --gold: #ffc857;
    --gold-light: #ffd97a;
    --border-light: rgba(148, 163, 184, 0.25);
    --footer-bg: #0f1a26;
    --footer-text: #cbd5e1;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 40px rgba(255, 200, 87, 0.15);
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --blur-bg: rgba(255, 255, 255, 0.6);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --dark-bg: #0d141b;
    --dark-card: rgba(30, 41, 54, 0.85);
    --dark-card-solid: #1e2630;
    --dark-text: #e2e8f0;
    --dark-heading: #f8fafc;
    --dark-muted: #94a3b8;
    --dark-border: rgba(148, 163, 184, 0.15);
    --dark-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-light);
    background-image: 
        radial-gradient(at 10% 10%, rgba(43, 79, 124, 0.06) 0px, transparent 50%),
        radial-gradient(at 90% 20%, rgba(255, 200, 87, 0.04) 0px, transparent 50%),
        radial-gradient(at 50% 80%, rgba(43, 79, 124, 0.05) 0px, transparent 50%);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background-color 0.4s ease, color 0.3s ease;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
    background-image: 
        radial-gradient(at 10% 10%, rgba(43, 79, 124, 0.15) 0px, transparent 50%),
        radial-gradient(at 90% 20%, rgba(255, 200, 87, 0.05) 0px, transparent 50%),
        radial-gradient(at 50% 80%, rgba(43, 79, 124, 0.1) 0px, transparent 50%);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
    width: 10px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--accent), var(--accent-dark));
    border-radius: 20px;
    border: 2px solid transparent;
    background-clip: content-box;
}

body.dark-mode::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #3a6a9f, #2b4f7c);
    border: 2px solid transparent;
    background-clip: content-box;
}

/* ===== 导航栏 ===== */
.navbar {
    background: rgba(26, 38, 52, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    padding-top: 16px;
    padding-bottom: 16px;
    gap: 12px;
}

.logo {
    font-size: 1.9rem;
    font-weight: 800;
    color: #fff;
    text-decoration: none;
    letter-spacing: 1px;
    background: linear-gradient(135deg, #ffc857, #ffd97a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    transition: transform 0.3s ease;
    display: inline-block;
}

.logo:hover {
    transform: scale(1.05);
}

.logo span {
    -webkit-text-fill-color: #ffc857;
    color: #ffc857;
    font-weight: 900;
}

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

.nav-links a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 4px;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    font-size: 0.95rem;
    letter-spacing: 0.3px;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--gold), var(--gold-light));
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: #ffffff;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.search-box {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    padding: 4px 8px 4px 16px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.search-box:focus-within {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 200, 87, 0.5);
    box-shadow: 0 0 20px rgba(255, 200, 87, 0.15);
}

.search-box input {
    background: transparent;
    border: none;
    padding: 8px 6px;
    color: #fff;
    outline: none;
    width: 130px;
    font-size: 0.9rem;
    transition: width 0.3s ease;
}

.search-box input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.search-box input:focus {
    width: 160px;
}

.search-box button {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 6px 8px;
    border-radius: 50%;
    transition: var(--transition);
}

.search-box button:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.1);
}

.dark-toggle {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
    cursor: pointer;
    color: #fff;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dark-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    padding: 0 8px;
    transition: var(--transition);
}

.menu-toggle:hover {
    transform: scale(1.1);
}

.mobile-menu {
    display: none;
    width: 100%;
    background: rgba(26, 38, 52, 0.95);
    backdrop-filter: blur(20px);
    padding: 10px 0 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    animation: slideDown 0.3s ease;
}

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

.mobile-menu a {
    color: #fff;
    padding: 14px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: block;
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.mobile-menu a:hover {
    background: rgba(255, 255, 255, 0.08);
    padding-left: 32px;
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 20px 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

body.dark-mode .breadcrumb {
    color: var(--dark-muted);
}

.breadcrumb a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

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

.breadcrumb span {
    font-weight: 500;
}

/* ===== Hero Banner ===== */
.hero {
    background: linear-gradient(135deg, #1a2634 0%, #2a405c 40%, #1e3a5f 100%);
    color: #fff;
    padding: 60px 0 70px;
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(255, 200, 87, 0.15) 0%, transparent 70%);
    animation: floatGlow 8s ease-in-out infinite alternate;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 60%;
    height: 100%;
    background: radial-gradient(circle, rgba(43, 79, 124, 0.3) 0%, transparent 70%);
    animation: floatGlow 6s ease-in-out infinite alternate-reverse;
}

@keyframes floatGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(30px, -20px) scale(1.2); }
}

.hero .container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 20px;
    color: #ffffff;
    letter-spacing: -0.5px;
    animation: fadeInUp 0.8s ease;
}

.hero h1 span {
    color: var(--gold);
    background: linear-gradient(135deg, #ffc857, #ffd97a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.15rem;
    opacity: 0.95;
    margin-bottom: 28px;
    max-width: 600px;
    color: #e2e8f0;
    animation: fadeInUp 0.8s ease 0.1s both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.btn {
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
    font-size: 1rem;
    letter-spacing: 0.3px;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.btn:hover::after {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, #ffc857, #ffd97a);
    color: #1a2634;
    box-shadow: 0 4px 20px rgba(255, 200, 87, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 200, 87, 0.4);
}

.btn-outline {
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: #ffffff;
    background: transparent;
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #fff;
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 36px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.stat-item {
    text-align: center;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -20px;
    top: 10%;
    height: 80%;
    width: 1px;
    background: rgba(255, 255, 255, 0.15);
}

.stat-number {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--gold);
    display: block;
    line-height: 1.2;
    text-shadow: 0 0 30px rgba(255, 200, 87, 0.3);
}

.stat-label {
    font-size: 0.9rem;
    color: #cbd5e1;
    letter-spacing: 0.5px;
}

.hero svg {
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: fadeInScale 1s ease 0.2s both;
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

/* ===== 通用卡片 ===== */
.card {
    background-color: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

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

body.dark-mode .card {
    background-color: var(--dark-card);
    border-color: var(--dark-border);
    box-shadow: var(--dark-shadow);
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 36px;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--gold), var(--gold-light));
    border-radius: 4px;
}

body.dark-mode .section-title {
    color: var(--dark-heading);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 28px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 30px;
}

/* ===== 品牌介绍 ===== */
.brand-intro {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin: 30px 0;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.brand-intro::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 200, 87, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

body.dark-mode .brand-intro {
    background: var(--dark-card);
    border-color: var(--dark-border);
}

.intro-text p {
    color: var(--text-secondary);
    margin-bottom: 18px;
    font-size: 1.02rem;
    line-height: 1.8;
}

body.dark-mode .intro-text p {
    color: var(--dark-text);
}

.intro-text strong {
    color: var(--accent);
    font-weight: 700;
}

body.dark-mode .intro-text strong {
    color: var(--gold);
}

/* ===== 文章卡片 ===== */
.article-card {
    transition: var(--transition);
    cursor: pointer;
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.article-card h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 10px;
    font-weight: 700;
    transition: color 0.3s ease;
}

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

body.dark-mode .article-card h3 {
    color: var(--dark-heading);
}

body.dark-mode .article-card:hover h3 {
    color: var(--gold);
}

.article-meta {
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

body.dark-mode .article-meta {
    color: var(--dark-muted);
}

.article-summary {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

body.dark-mode .article-summary {
    color: var(--dark-text);
}

.read-more {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

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

body.dark-mode .read-more {
    color: #7aa5d9;
}

body.dark-mode .read-more:hover {
    color: var(--gold);
}

.svg-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.article-card:hover .svg-img {
    transform: scale(1.03);
}

/* ===== FAQ ===== */
.faq-item {
    border-bottom: 1px solid var(--border-light);
    padding: 20px 0;
    transition: var(--transition);
}

body.dark-mode .faq-item {
    border-color: var(--dark-border);
}

.faq-question {
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    transition: var(--transition);
    padding: 4px 0;
    user-select: none;
}

.faq-question:hover {
    color: var(--accent);
    padding-left: 8px;
}

body.dark-mode .faq-question {
    color: var(--dark-heading);
}

body.dark-mode .faq-question:hover {
    color: var(--gold);
}

.faq-answer {
    margin-top: 14px;
    color: var(--text-secondary);
    padding-right: 30px;
    display: none;
    line-height: 1.8;
    animation: fadeIn 0.3s ease;
}

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

body.dark-mode .faq-answer {
    color: var(--dark-text);
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-toggle {
    font-size: 1.6rem;
    color: var(--accent);
    transition: var(--transition);
    font-weight: 300;
    line-height: 1;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
    color: var(--gold);
}

body.dark-mode .faq-toggle {
    color: var(--gold);
}

/* ===== HowTo ===== */
.howto-box {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 36px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
}

body.dark-mode .howto-box {
    background: var(--dark-card);
    border-color: var(--dark-border);
}

.howto-step {
    display: flex;
    gap: 18px;
    margin-bottom: 20px;
    padding: 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.howto-step:hover {
    background: rgba(43, 79, 124, 0.05);
    transform: translateX(8px);
}

body.dark-mode .howto-step:hover {
    background: rgba(255, 255, 255, 0.03);
}

.step-num {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(43, 79, 124, 0.3);
}

.howto-step strong {
    color: var(--text-primary);
}

body.dark-mode .howto-step strong {
    color: var(--dark-heading);
}

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

body.dark-mode .howto-box p {
    color: var(--dark-text);
}

/* ===== 表格 ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

body.dark-mode .data-table {
    background: var(--dark-card);
}

.data-table th {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: #fff;
    padding: 16px 14px;
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: 14px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

body.dark-mode .data-table td {
    border-color: var(--dark-border);
    color: var(--dark-text);
}

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

.data-table tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background: rgba(43, 79, 124, 0.03);
}

body.dark-mode .data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* ===== 客户评价 ===== */
.testimonial {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-left: 4px solid var(--gold);
    padding: 24px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.testimonial::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 20px;
    font-size: 5rem;
    color: var(--gold);
    opacity: 0.2;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

body.dark-mode .testimonial {
    background: var(--dark-card);
    border-color: var(--gold);
}

.testimonial p {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-size: 1rem;
    line-height: 1.7;
}

body.dark-mode .testimonial p {
    color: var(--dark-text);
}

.testimonial footer {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
}

body.dark-mode .testimonial footer {
    color: var(--gold);
}

/* ===== Footer ===== */
.footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 60px 0 20px;
    margin-top: 80px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 200, 87, 0.3), transparent);
}

.footer a {
    color: #b0c4de;
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

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

.footer h4 {
    color: #ffffff;
    margin-bottom: 20px;
    font-size: 1.1rem;
    font-weight: 700;
    position: relative;
}

.footer h4::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--gold);
    border-radius: 2px;
}

.footer p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: #94a3b8;
    margin-bottom: 8px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 40px;
    padding-top: 24px;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    color: #94a3b8;
}

/* ===== 返回顶部 ===== */
.back-top {
    position: fixed;
    bottom: 40px;
    right: 30px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: #fff;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    border: none;
    box-shadow: 0 4px 20px rgba(43, 79, 124, 0.4);
    backdrop-filter: blur(10px);
}

.back-top.show {
    opacity: 1;
    visibility: visible;
}

.back-top:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 30px rgba(43, 79, 124, 0.5);
}

.back-top::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--gold);
    opacity: 0;
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.6; }
    100% { transform: scale(1.5); opacity: 0; }
}

/* ===== 联系卡片 ===== */
#contact .card {
    height: 100%;
}

#contact .card h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.2rem;
    font-weight: 700;
}

body.dark-mode #contact .card h3 {
    color: var(--dark-heading);
}

#contact .card p {
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

body.dark-mode #contact .card p {
    color: var(--dark-text);
}

/* ===== 友情链接 ===== */
.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: space-between;
    padding: 24px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    margin: 30px 0;
}

body.dark-mode .friend-links {
    background: var(--dark-card);
    border-color: var(--dark-border);
}

.friend-links strong {
    color: var(--text-primary);
    margin-right: 10px;
}

body.dark-mode .friend-links strong {
    color: var(--dark-heading);
}

.friend-links a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
    margin: 0 6px;
}

.friend-links a:hover {
    color: var(--gold);
}

body.dark-mode .friend-links a {
    color: #7aa5d9;
}

body.dark-mode .friend-links a:hover {
    color: var(--gold);
}

/* ===== 通用工具类 ===== */
.mt-4 {
    margin-top: 40px;
}

.text-center {
    text-align: center;
}

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

body.dark-mode .color-muted {
    color: var(--dark-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.6rem;
    }
    
    .hero .container {
        gap: 30px;
    }
}

@media (max-width: 900px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .mobile-menu {
        display: none;
    }
    
    .mobile-menu.active {
        display: flex;
        flex-direction: column;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2.4rem;
    }
    
    .hero p {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero svg {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .brand-intro,
    .howto-box {
        padding: 24px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .search-box input {
        width: 100px;
    }
    
    .search-box input:focus {
        width: 120px;
    }
    
    .hero {
        padding: 40px 0 50px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .hero-stats {
        gap: 20px;
    }
    
    .stat-item:not(:last-child)::after {
        right: -10px;
    }
    
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .back-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.5rem;
    }
    
    .nav-actions {
        gap: 8px;
    }
    
    .search-box {
        padding-left: 10px;
    }
    
    .search-box input {
        width: 80px;
        font-size: 0.85rem;
    }
    
    .dark-toggle {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .brand-intro,
    .howto-box {
        padding: 18px;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .navbar,
    .hero,
    .footer,
    .back-top,
    .search-box,
    .dark-toggle,
    .menu-toggle,
    .mobile-menu {
        display: none !important;
    }
    
    body {
        background: #fff;
        color: #000;
    }
    
    .card,
    .brand-intro,
    .howto-box {
        box-shadow: none;
        border: 1px solid #ddd;
        background: #fff;
    }
}

/* ===== 动画增强 ===== */
@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.card:hover .svg-img {
    filter: brightness(1.05);
}

/* 滚动条动画 */
body {
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
}

body.dark-mode {
    scrollbar-color: #3a6a9f transparent;
}

/* 焦点可见性 */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
}

/* 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;
    }
}
```