/* ============================================
   众恒影视官网 - 主样式表
   深色电影感主题 · 响应式设计
   ============================================ */

/* === CSS 变量 === */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #151515;
    --text-primary: #f0f0f0;
    --text-secondary: #999999;
    --text-muted: #666666;
    --accent-gold: #c8a45c;
    --accent-gold-dim: rgba(200, 164, 92, 0.15);
    --accent-red: #c0392b;
    --accent-teal: #1a5c4c;
    --border-color: #2a2a2a;
    --border-light: #333333;
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
    --shadow-md: 0 10px 30px rgba(0,0,0,0.3);
    --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-en: "Helvetica Neue", "Arial", sans-serif;
}

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-cn);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    overflow-x: hidden;
}

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

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

/* === 通用容器 === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === 导航栏 === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.3s ease;
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-wrapper {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-svg {
    width: 40px;
    height: 40px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-cn {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.logo-slogan {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: 36px;
}

.nav-link {
    font-size: 14px;
    color: var(--text-secondary);
    letter-spacing: 1px;
    position: relative;
    padding: 4px 0;
    transition: color var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gold);
    transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* === 下拉菜单 === */
.nav-menu .nav-dropdown {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-menu .nav-dropdown > .nav-link {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-menu .nav-dropdown > .nav-link::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-right: 1px solid currentColor;
    border-bottom: 1px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    opacity: 0.6;
    transition: transform var(--transition);
    order: 2;
    margin-left: 2px;
    flex-shrink: 0;
}

.nav-menu .nav-dropdown:hover > .nav-link::before {
    transform: rotate(-135deg) translateY(1px);
}

.nav-menu .nav-dropdown .dropdown-menu {
    position: absolute !important;
    top: 100% !important;
    left: 50% !important;
    transform: translateX(-50%) translateY(10px) !important;
    min-width: 150px !important;
    width: auto !important;
    padding: 8px 0 !important;
    margin: 0 !important;
    background: rgba(20, 20, 20, 0.98) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color) !important;
    border-radius: 8px !important;
    box-shadow: var(--shadow-lg) !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
    pointer-events: none !important;
    z-index: 9999 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    white-space: nowrap !important;
}

.nav-menu .nav-dropdown:hover .dropdown-menu {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateX(-50%) translateY(0) !important;
    pointer-events: auto !important;
}

.nav-menu .dropdown-item {
    display: block !important;
    padding: 10px 20px !important;
    font-size: 13px !important;
    color: var(--text-secondary) !important;
    letter-spacing: 0.5px !important;
    transition: all 0.25s ease !important;
    white-space: nowrap !important;
    text-align: center !important;
    margin: 0 !important;
    width: 100% !important;
    box-sizing: border-box !important;
    line-height: 1.4 !important;
}

.nav-menu .dropdown-item:hover {
    color: var(--accent-gold) !important;
    background: var(--accent-gold-dim) !important;
}

.dropdown-item.active {
    color: var(--accent-gold);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* === Hero 全屏视觉 === */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 30%, #16213e 60%, #0a0a0a 100%);
}

/* 电影胶片颗粒效果 */
.hero-grain {
    position: absolute;
    inset: 0;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    animation: grain 8s steps(10) infinite;
}

@keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -10%); }
    20% { transform: translate(-15%, 5%); }
    30% { transform: translate(7%, -25%); }
    40% { transform: translate(-5%, 25%); }
    50% { transform: translate(-15%, 10%); }
    60% { transform: translate(15%, 0%); }
    70% { transform: translate(0%, 15%); }
    80% { transform: translate(3%, 35%); }
    90% { transform: translate(-10%, 10%); }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(200, 164, 92, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(26, 92, 76, 0.06) 0%, transparent 50%),
        linear-gradient(180deg, rgba(0,0,0,0.3) 0%, transparent 30%, transparent 70%, rgba(0,0,0,0.8) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 24px;
}

.hero-badge {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--accent-gold);
    border: 1px solid rgba(200, 164, 92, 0.3);
    padding: 6px 20px;
    margin-bottom: 32px;
    opacity: 0;
    animation: fadeInUp 1s 0.3s forwards;
}

.hero-title {
    font-size: clamp(42px, 8vw, 80px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: 4px;
    margin-bottom: 16px;
    opacity: 0;
    animation: fadeInUp 1s 0.5s forwards;
}

.hero-title-en {
    font-size: clamp(36px, 7vw, 68px);
    background: linear-gradient(135deg, var(--accent-gold) 0%, #e8d5a3 50%, var(--accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    letter-spacing: 6px;
    margin-bottom: 20px;
    opacity: 0;
    animation: fadeInUp 1s 0.7s forwards;
}

.hero-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 2;
    max-width: 500px;
    margin: 0 auto 40px;
    opacity: 0;
    animation: fadeInUp 1s 0.9s forwards;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 1s 1.1s forwards;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 14px;
    letter-spacing: 2px;
    border-radius: 0;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-gold);
    color: #0a0a0a;
    font-weight: 600;
}

.btn-primary:hover {
    background: #e8d5a3;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(200, 164, 92, 0.3);
}

.btn-outline {
    border: 1px solid var(--text-secondary);
    color: var(--text-primary);
    background: transparent;
}

.btn-outline:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
    transform: translateY(-2px);
}

/* 滚动指示器 */
.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator span {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--accent-gold);
    border-radius: 2px;
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { top: 8px; opacity: 1; }
    50% { top: 20px; opacity: 0.3; }
}

/* === Section 通用样式 === */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--accent-gold);
    margin-bottom: 12px;
    font-family: var(--font-en);
    font-weight: 600;
}

.section-title {
    font-size: clamp(28px, 4vw, 36px);
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-line {
    width: 40px;
    height: 2px;
    background: var(--accent-gold);
    margin: 0 auto;
}

/* === 关于我们速览 === */
.about-preview {
    padding: 120px 0;
    background: var(--bg-secondary);
    position: relative;
}

.about-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-quote {
    font-size: 20px;
    font-style: italic;
    color: var(--text-primary);
    line-height: 2;
    margin-bottom: 16px;
    position: relative;
    padding-left: 20px;
    border-left: 2px solid var(--accent-gold);
}

.about-author {
    font-size: 14px;
    color: var(--accent-gold);
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.about-body {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 2;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.stat-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
}

.stat-card:hover {
    border-color: var(--accent-gold);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--accent-gold);
    font-family: var(--font-en);
    line-height: 1;
    display: inline;
}

.stat-unit {
    font-size: 20px;
    font-weight: 600;
    color: var(--accent-gold);
    display: inline;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 8px;
    letter-spacing: 1px;
}

/* === 服务 === */
.services {
    padding: 120px 0;
    background: var(--bg-primary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 48px 32px;
    position: relative;
    transition: all var(--transition);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gold);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.service-card:hover {
    border-color: var(--accent-gold);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.service-card.featured {
    border-color: rgba(200, 164, 92, 0.3);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(200, 164, 92, 0.05) 100%);
}

.service-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 11px;
    background: var(--accent-gold);
    color: #0a0a0a;
    padding: 4px 12px;
    font-weight: 600;
    letter-spacing: 1px;
}

.service-icon {
    width: 56px;
    height: 56px;
    color: var(--accent-gold);
    margin-bottom: 24px;
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.service-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
}

.service-tags li {
    font-size: 12px;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    padding: 4px 12px;
    transition: all 0.3s ease;
}

.service-card:hover .service-tags li {
    border-color: rgba(200, 164, 92, 0.3);
    color: var(--text-secondary);
}

/* === 作品集 === */
.portfolio {
    padding: 120px 0;
    background: var(--bg-secondary);
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    font-size: 13px;
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-gold);
    border-color: var(--accent-gold);
    color: #0a0a0a;
}

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

.portfolio-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition);
}

.portfolio-item:hover {
    transform: translateY(-4px);
}

.portfolio-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.6s ease;
}

.portfolio-item:hover .thumb-placeholder {
    transform: scale(1.05);
}

.thumb-play {
    width: 48px;
    height: 48px;
    background: rgba(0,0,0,0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.thumb-play svg {
    width: 18px;
    height: 18px;
    margin-left: 2px;
}

.portfolio-item:hover .thumb-play {
    background: rgba(200, 164, 92, 0.8);
    transform: scale(1.1);
}

.thumb-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px 16px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
}

.thumb-tag {
    font-size: 11px;
    color: var(--accent-gold);
    letter-spacing: 1px;
    border: 1px solid rgba(200, 164, 92, 0.5);
    padding: 2px 10px;
}

.portfolio-info {
    padding: 16px 0;
}

.portfolio-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

.portfolio-info p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.portfolio-more {
    text-align: center;
    margin-top: 48px;
}

/* === 合作客户 === */
.clients {
    padding: 100px 0;
    background: var(--bg-primary);
    overflow: hidden;
}

.clients-marquee {
    overflow: hidden;
    position: relative;
    mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
    display: flex;
    gap: 24px;
    animation: marquee 30s linear infinite;
    width: max-content;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.client-tag {
    display: inline-block;
    font-size: 14px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 10px 24px;
    white-space: nowrap;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.client-tag:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

/* === 设备展示 === */
.equipment {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.equip-item {
    text-align: center;
    padding: 40px 20px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    transition: all var(--transition);
}

.equip-item:hover {
    border-color: var(--accent-gold);
    transform: translateY(-4px);
}

.equip-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 20px;
    color: var(--accent-gold);
}

.equip-icon svg {
    width: 100%;
    height: 100%;
}

.equip-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.equip-item p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* === 联系我们 === */
.contact {
    padding: 120px 0;
    background: var(--bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    color: var(--accent-gold);
}

.contact-icon svg {
    width: 100%;
    height: 100%;
}

.contact-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.contact-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    background: var(--bg-tertiary);
    border: 1px dashed var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-muted);
}

.contact-map {
    position: relative;
}

.map-placeholder {
    width: 100%;
    height: 100%;
    min-height: 300px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.map-pin {
    width: 40px;
    height: 40px;
    animation: mapBounce 2s ease infinite;
}

@keyframes mapBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.map-placeholder p {
    font-size: 14px;
    color: var(--text-secondary);
}

.map-note {
    font-size: 12px !important;
    color: var(--text-muted) !important;
}

/* === 页脚 === */
.footer {
    padding: 60px 0 30px;
    background: #050505;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.footer-logo .logo-cn {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 3px;
}

.footer-slogan {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 8px;
    letter-spacing: 2px;
}

.footer-en {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
    font-family: var(--font-en);
    letter-spacing: 1px;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col h5 {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.footer-col a {
    font-size: 13px;
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--accent-gold);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 2;
}

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

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* === 响应式 === */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    /* 移动端导航 */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 24px;
        transition: right 0.3s ease;
        border-left: 1px solid var(--border-color);
    }

    .nav-menu.open {
        right: 0;
    }

    .hamburger {
        display: flex;
    }

    /* 移动端下拉菜单 */
    .nav-menu .nav-dropdown {
        width: 100%;
    }

    .nav-menu .nav-dropdown > .nav-link::before {
        position: absolute !important;
        right: 0 !important;
        top: 50% !important;
        transform: translateY(-50%) rotate(45deg) !important;
    }

    .nav-menu .nav-dropdown.open > .nav-link::before {
        transform: translateY(-50%) rotate(-135deg) !important;
    }

    .nav-menu .nav-dropdown .dropdown-menu {
        position: static !important;
        transform: none !important;
        opacity: 1 !important;
        visibility: visible !important;
        pointer-events: auto !important;
        background: transparent !important;
        backdrop-filter: none !important;
        border: none !important;
        box-shadow: none !important;
        border-radius: 0 !important;
        padding: 0 !important;
        max-height: 0 !important;
        overflow: hidden !important;
        transition: max-height 0.35s ease, margin 0.35s ease !important;
        margin-top: 0 !important;
        display: flex !important;
        flex-direction: column !important;
    }

    .nav-menu .nav-dropdown.open .dropdown-menu {
        max-height: 300px !important;
        margin-top: 8px !important;
    }

    .nav-menu .dropdown-item {
        text-align: left !important;
        padding: 8px 0 8px 16px !important;
        font-size: 13px !important;
        border-left: 2px solid var(--border-color) !important;
        margin-bottom: 4px !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .nav-menu .dropdown-item:hover {
        background: transparent !important;
        border-left-color: var(--accent-gold) !important;
        color: var(--accent-gold) !important;
    }

    /* Hero 移动端 */
    .hero-title {
        font-size: 36px;
    }

    .hero-title-en {
        font-size: 30px;
    }

    .hero-subtitle {
        font-size: 14px;
        letter-spacing: 4px;
    }

    .hero-desc {
        font-size: 13px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .btn {
        width: 200px;
        text-align: center;
    }

    /* 服务卡片 */
    .services-grid {
        grid-template-columns: 1fr;
    }

    /* 作品集 */
    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-filter {
        gap: 8px;
    }

    .filter-btn {
        font-size: 12px;
        padding: 6px 14px;
    }

    /* 设备 */
    .equipment-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    /* 联系 */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    /* 统计 */
    .about-stats {
        grid-template-columns: 1fr 1fr;
    }

    .stat-number {
        font-size: 36px;
    }

    /* 页脚 */
    .footer-content {
        flex-direction: column;
        gap: 32px;
    }

    .footer-links {
        gap: 40px;
    }

    /* Section padding */
    .about-preview,
    .services,
    .portfolio,
    .contact {
        padding: 80px 0;
    }

    .clients,
    .equipment {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-badge {
        font-size: 10px;
        padding: 4px 14px;
    }

    .section-title {
        font-size: 24px;
    }

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

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

/* ==========================================================
   v1.1 补充样式：滚动淡入、筛选隐藏、影视笔记、副标题
   ========================================================== */

/* 滚动淡入 */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* 筛选隐藏 */
.portfolio-item.hidden {
    display: none;
}

/* 分区副标题（保密声明等） */
.section-sub {
    max-width: 640px;
    margin: 14px auto 0;
    color: var(--text-light, #9aa0a6);
    font-size: 14px;
    line-height: 1.8;
    letter-spacing: 0.5px;
}

/* 影视笔记（Journal） */
.news {
    padding: 100px 0;
    background: #0d0f14;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 56px;
}

.news-card {
    background: #151823;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    padding: 32px 28px;
    transition: transform 0.35s ease, border-color 0.35s ease;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-6px);
    border-color: rgba(192, 57, 43, 0.4);
}

.news-type {
    display: inline-block;
    align-self: flex-start;
    font-size: 11px;
    letter-spacing: 2px;
    color: #c0392b;
    border: 1px solid rgba(192, 57, 43, 0.5);
    padding: 4px 12px;
    border-radius: 2px;
    margin-bottom: 20px;
}

.news-title {
    font-size: 18px;
    font-weight: 600;
    color: #f0f0f0;
    line-height: 1.6;
    margin: 0 0 14px;
}

.news-desc {
    font-size: 14px;
    color: #9aa0a6;
    line-height: 1.9;
    margin: 0 0 22px;
    flex-grow: 1;
}

.news-more {
    font-size: 13px;
    color: #c0392b;
    letter-spacing: 1px;
}

@media (max-width: 900px) {
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* ==========================================================
   v1.2 真实Logo样式
   ========================================================== */
.logo-img {
    height: 44px;
    width: auto;
    display: block;
    transition: opacity 0.3s ease;
}

.logo-dark {
    display: none;
}

.footer-logo-img {
    height: 96px;
    width: auto;
    display: block;
    margin-bottom: 14px;
}

@media (max-width: 768px) {
    .logo-img {
        height: 36px;
    }
}

@media (max-width: 480px) {
    .logo-img {
        height: 30px;
    }
}