/* ============================================
   国产视频 - 胶片纪录片风 主样式表
   CSS前缀: gv-
   ============================================ */

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

:root {
    --gv-primary: #333333;
    --gv-secondary: #F5F5F5;
    --gv-accent: #C7A265;
    --gv-text: #DDDDDD;
    --gv-link: #E5D8B1;
    --gv-dark: #1a1a1a;
    --gv-card-bg: #2a2a2a;
    --gv-border: #444444;
    --gv-font-title: 'Source Han Serif CN', 'Noto Serif SC', 'Songti SC', serif;
    --gv-font-body: 'Heiti SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--gv-font-body);
    background-color: var(--gv-dark);
    color: var(--gv-text);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--gv-link);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--gv-font-title);
    color: var(--gv-secondary);
    font-weight: 700;
    line-height: 1.4;
}

/* --- 干扰标签隐藏 --- */
.docu-jammer-block {
    display: none;
}

/* --- 导航栏 --- */
#gv-header {
    background-color: var(--gv-primary);
    padding: 0;
    width: 100%;
    z-index: 100;
    border-bottom: 1px solid var(--gv-border);
}

.gv-nav-inner {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
}

.gv-logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
}

.gv-logo-img {
    width: 42px;
    height: 42px;
    border-radius: 4px;
}

.gv-logo-text {
    font-family: var(--gv-font-title);
    font-size: 1.25rem;
    color: var(--gv-accent);
    letter-spacing: 2px;
    font-weight: 700;
}

.gv-nav-list {
    display: flex;
    list-style: none;
    gap: 0;
}

.gv-nav-item {
    position: relative;
}

.gv-nav-link {
    display: block;
    padding: 10px 18px;
    color: var(--gv-text);
    font-size: 0.95rem;
    letter-spacing: 1px;
    transition: color 0.3s ease;
    position: relative;
}

.gv-nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 18px;
    right: 18px;
    height: 1px;
    background-color: var(--gv-link);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.gv-nav-link:hover {
    color: var(--gv-link);
}

.gv-nav-link:hover::after {
    transform: scaleX(1);
}

.gv-nav-link.gv-active {
    color: var(--gv-accent);
}

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

.gv-hamburger-line {
    width: 24px;
    height: 2px;
    background-color: var(--gv-text);
    transition: all 0.3s ease;
}

.gv-mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100vh;
    background-color: var(--gv-primary);
    z-index: 200;
    transition: right 0.3s ease;
    padding: 60px 24px 24px;
    border-left: 1px solid var(--gv-accent);
}

.gv-mobile-nav.gv-open {
    right: 0;
}

.gv-mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 190;
}

.gv-mobile-overlay.gv-open {
    display: block;
}

.gv-mobile-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--gv-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px 8px;
}

.gv-mobile-nav-list {
    list-style: none;
}

.gv-mobile-nav-link {
    display: block;
    padding: 14px 0;
    color: var(--gv-text);
    font-size: 1.1rem;
    border-bottom: 1px solid var(--gv-border);
    transition: color 0.3s ease;
}

.gv-mobile-nav-link:hover {
    color: var(--gv-accent);
}

/* --- Hero Banner --- */
#gv-hero {
    position: relative;
    width: 100%;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-color: var(--gv-dark);
}

.gv-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.1);
    opacity: 0.5;
}

.gv-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(26,26,26,0.3) 0%, rgba(26,26,26,0.8) 100%);
}

.gv-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 40px 24px;
    animation: gv-fadeIn 1.5s ease;
}

.gv-hero-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto 24px;
    border-radius: 8px;
}

.gv-hero-title {
    font-family: var(--gv-font-title);
    font-size: 3rem;
    color: var(--gv-secondary);
    letter-spacing: 6px;
    margin-bottom: 16px;
    font-weight: 900;
}

.gv-hero-slogan {
    font-family: var(--gv-font-title);
    font-size: 1.3rem;
    color: var(--gv-accent);
    letter-spacing: 8px;
    font-weight: 400;
}

.gv-hero-filmstrip {
    width: 80%;
    max-width: 600px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gv-accent), transparent);
    margin: 24px auto 0;
}

@keyframes gv-fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- 通用模块容器 --- */
.gv-section {
    max-width: 1440px;
    margin: 0 auto;
    padding: 60px 24px;
}

.gv-section-header {
    text-align: center;
    margin-bottom: 48px;
}

.gv-section-title {
    font-size: 2rem;
    color: var(--gv-secondary);
    letter-spacing: 4px;
    margin-bottom: 12px;
}

.gv-section-subtitle {
    font-family: var(--gv-font-title);
    font-size: 1rem;
    color: var(--gv-accent);
    letter-spacing: 2px;
    font-style: italic;
}

.gv-section-divider {
    width: 60px;
    height: 2px;
    background-color: var(--gv-accent);
    margin: 16px auto 0;
}

/* --- 焦点专题卡片 --- */
.gv-topics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.gv-topic-card {
    position: relative;
    border-radius: 4px;
    overflow: hidden;
    background-color: var(--gv-card-bg);
    aspect-ratio: 3/4;
    cursor: pointer;
    transition: box-shadow 0.4s ease;
}

.gv-topic-card:hover {
    box-shadow: 0 0 20px rgba(199, 162, 101, 0.3);
}

.gv-topic-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease, filter 0.5s ease;
}

.gv-topic-card:hover .gv-topic-card-img {
    transform: scale(1.05);
    filter: brightness(0.7);
}

.gv-topic-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px 16px;
    background: linear-gradient(transparent, rgba(0,0,0,0.85));
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.4s ease;
}

.gv-topic-card:hover .gv-topic-card-overlay {
    transform: translateY(0);
    opacity: 1;
}

.gv-topic-card-title {
    font-size: 1.1rem;
    color: var(--gv-secondary);
    margin-bottom: 8px;
}

.gv-topic-card-desc {
    font-size: 0.85rem;
    color: var(--gv-text);
    line-height: 1.5;
}

.gv-topic-card-play {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    color: var(--gv-accent);
    font-size: 0.85rem;
}

/* --- 影像民族志 瀑布流 --- */
.gv-ethnography-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.gv-ethno-card {
    background-color: var(--gv-card-bg);
    border-radius: 4px;
    overflow: hidden;
    transition: box-shadow 0.4s ease;
}

.gv-ethno-card:hover {
    box-shadow: 0 0 16px rgba(199, 162, 101, 0.25);
}

.gv-ethno-card-img-wrap {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.gv-ethno-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gv-ethno-card:hover .gv-ethno-card-img {
    transform: scale(1.05);
}

.gv-ethno-card-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.7);
    color: var(--gv-text);
    padding: 2px 8px;
    font-size: 0.75rem;
    border-radius: 2px;
}

.gv-ethno-card-info {
    padding: 16px;
}

.gv-ethno-card-title {
    font-size: 1rem;
    color: var(--gv-secondary);
    margin-bottom: 6px;
    font-family: var(--gv-font-title);
}

.gv-ethno-card-meta {
    font-size: 0.8rem;
    color: #999;
}

/* --- 导演专栏 --- */
.gv-directors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.gv-director-card {
    text-align: center;
    padding: 24px 16px;
    transition: transform 0.3s ease;
}

.gv-director-card:hover {
    transform: translateY(-6px);
}

.gv-director-avatar {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    filter: grayscale(100%);
    margin: 0 auto 16px;
    border: 2px solid var(--gv-border);
    transition: filter 0.4s ease, border-color 0.4s ease;
}

.gv-director-card:hover .gv-director-avatar {
    filter: grayscale(0%);
    border-color: var(--gv-accent);
}

.gv-director-name {
    font-size: 1.1rem;
    color: var(--gv-secondary);
    margin-bottom: 6px;
    font-family: var(--gv-font-title);
}

.gv-director-bio {
    font-size: 0.85rem;
    color: #999;
    line-height: 1.5;
}

.gv-more-link {
    display: inline-block;
    margin-top: 32px;
    padding: 10px 28px;
    border: 1px solid var(--gv-accent);
    color: var(--gv-accent);
    font-size: 0.9rem;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.gv-more-link:hover {
    background-color: var(--gv-accent);
    color: var(--gv-dark);
}

/* --- 幕后故事 --- */
.gv-stories-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.gv-story-item {
    display: flex;
    gap: 24px;
    background-color: var(--gv-card-bg);
    border-radius: 4px;
    overflow: hidden;
    transition: box-shadow 0.4s ease;
}

.gv-story-item:hover {
    box-shadow: 0 0 16px rgba(199, 162, 101, 0.2);
}

.gv-story-img-wrap {
    flex: 0 0 360px;
    overflow: hidden;
}

.gv-story-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 220px;
    transition: transform 0.5s ease;
}

.gv-story-item:hover .gv-story-img {
    transform: scale(1.05);
}

.gv-story-content {
    flex: 1;
    padding: 24px 24px 24px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.gv-story-title {
    font-size: 1.25rem;
    color: var(--gv-secondary);
    margin-bottom: 12px;
    font-family: var(--gv-font-title);
}

.gv-story-excerpt {
    font-size: 0.9rem;
    color: var(--gv-text);
    line-height: 1.8;
    margin-bottom: 16px;
}

.gv-story-readmore {
    color: var(--gv-accent);
    font-size: 0.85rem;
    letter-spacing: 1px;
}

/* --- 器材档案 --- */
.gv-equipment-wrap {
    position: relative;
    border-radius: 4px;
    overflow: hidden;
}

.gv-equipment-img {
    width: 100%;
    max-height: 480px;
    object-fit: cover;
}

.gv-equipment-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 32px;
}

.gv-equip-card {
    background-color: var(--gv-card-bg);
    padding: 24px;
    border-radius: 4px;
    border: 1px solid var(--gv-border);
    transition: border-color 0.3s ease;
}

.gv-equip-card:hover {
    border-color: var(--gv-accent);
}

.gv-equip-name {
    font-size: 1.1rem;
    color: var(--gv-accent);
    margin-bottom: 8px;
    font-family: var(--gv-font-title);
}

.gv-equip-specs {
    font-size: 0.85rem;
    color: var(--gv-text);
    line-height: 1.7;
}

/* --- 原创扶持计划 --- */
#gv-support {
    background: linear-gradient(135deg, var(--gv-primary) 0%, var(--gv-dark) 100%);
}

.gv-support-layout {
    display: flex;
    gap: 48px;
    align-items: center;
}

.gv-support-text {
    flex: 1;
}

.gv-support-text p {
    margin-bottom: 16px;
    font-size: 0.95rem;
    line-height: 1.9;
}

.gv-support-img-wrap {
    flex: 0 0 45%;
    border-radius: 4px;
    overflow: hidden;
}

.gv-support-img {
    width: 100%;
    border-radius: 4px;
}

.gv-btn-apply {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 32px;
    background-color: var(--gv-accent);
    color: var(--gv-dark);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 2px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.gv-btn-apply:hover {
    background-color: var(--gv-link);
    color: var(--gv-dark);
}

/* --- 展映日历 --- */
.gv-calendar-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.gv-calendar-item {
    display: flex;
    gap: 20px;
    background-color: var(--gv-card-bg);
    padding: 24px;
    border-radius: 4px;
    border-left: 3px solid var(--gv-accent);
    transition: transform 0.3s ease;
}

.gv-calendar-item:hover {
    transform: translateX(4px);
}

.gv-calendar-date {
    flex: 0 0 80px;
    text-align: center;
}

.gv-calendar-day {
    font-size: 2rem;
    color: var(--gv-accent);
    font-weight: 700;
    font-family: var(--gv-font-title);
    line-height: 1;
}

.gv-calendar-month {
    font-size: 0.85rem;
    color: #999;
    margin-top: 4px;
}

.gv-calendar-info h4 {
    font-size: 1.05rem;
    color: var(--gv-secondary);
    margin-bottom: 6px;
}

.gv-calendar-info p {
    font-size: 0.85rem;
    color: var(--gv-text);
    line-height: 1.6;
}

.gv-calendar-tag {
    display: inline-block;
    margin-top: 8px;
    padding: 2px 10px;
    background-color: rgba(199,162,101,0.15);
    color: var(--gv-accent);
    font-size: 0.75rem;
    border-radius: 2px;
}

/* --- APP下载 --- */
#gv-app {
    position: relative;
    overflow: hidden;
    background-color: var(--gv-dark);
}

.gv-app-layout {
    display: flex;
    align-items: center;
    gap: 48px;
}

.gv-app-text {
    flex: 1;
}

.gv-app-title {
    font-size: 1.8rem;
    color: var(--gv-secondary);
    margin-bottom: 12px;
    font-family: var(--gv-font-title);
    line-height: 1.5;
}

.gv-app-subtitle {
    font-size: 1rem;
    color: var(--gv-text);
    margin-bottom: 24px;
}

.gv-app-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.gv-app-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: 1px solid var(--gv-accent);
    color: var(--gv-accent);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.gv-app-btn:hover {
    background-color: var(--gv-accent);
    color: var(--gv-dark);
}

.gv-app-qr {
    width: 120px;
    height: 120px;
    border: 1px solid var(--gv-border);
    border-radius: 4px;
}

.gv-app-mockup-wrap {
    flex: 0 0 300px;
}

.gv-app-mockup-img {
    max-height: 500px;
    margin: 0 auto;
    display: block;
}

/* --- 平台公约 --- */
#gv-guidelines {
    background-color: var(--gv-primary);
}

.gv-guidelines-content {
    max-width: 800px;
    margin: 0 auto;
}

.gv-guidelines-content h3 {
    font-size: 1.2rem;
    color: var(--gv-accent);
    margin: 24px 0 12px;
    font-family: var(--gv-font-title);
}

.gv-guidelines-content p {
    font-size: 0.9rem;
    line-height: 1.9;
    margin-bottom: 12px;
}

/* --- 页脚 --- */
#gv-footer {
    background-color: var(--gv-primary);
    border-top: 1px solid var(--gv-border);
    padding: 48px 24px 24px;
}

.gv-footer-inner {
    max-width: 1440px;
    margin: 0 auto;
}

.gv-footer-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
    margin-bottom: 36px;
}

.gv-footer-col-title {
    font-size: 1rem;
    color: var(--gv-accent);
    margin-bottom: 16px;
    letter-spacing: 2px;
    font-family: var(--gv-font-title);
}

.gv-footer-links {
    list-style: none;
}

.gv-footer-links li {
    margin-bottom: 10px;
}

.gv-footer-links a {
    color: var(--gv-text);
    font-size: 0.85rem;
    transition: color 0.3s ease;
}

.gv-footer-links a:hover {
    color: var(--gv-accent);
}

.gv-footer-social {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
}

.gv-footer-social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--gv-border);
    border-radius: 50%;
    color: var(--gv-text);
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.gv-footer-social-icon:hover {
    border-color: var(--gv-accent);
    color: var(--gv-accent);
}

.gv-footer-bottom {
    border-top: 1px solid var(--gv-border);
    padding-top: 24px;
    text-align: center;
}

.gv-footer-cert {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.gv-footer-award {
    display: flex;
    align-items: center;
    gap: 8px;
}

.gv-footer-award-img {
    width: 32px;
    height: 32px;
}

.gv-footer-award-text {
    font-size: 0.8rem;
    color: var(--gv-accent);
}

.gv-footer-cert-badge {
    width: 24px;
    height: 24px;
    vertical-align: middle;
}

.gv-footer-cert a {
    font-size: 0.8rem;
    color: var(--gv-text);
}

.gv-footer-copyright {
    font-size: 0.8rem;
    color: #777;
    margin-top: 12px;
}

/* --- 内页通用 --- */
.gv-page-banner {
    position: relative;
    width: 100%;
    min-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-color: var(--gv-dark);
}

.gv-page-banner-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    filter: grayscale(60%);
}

.gv-page-banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 40px 24px;
}

.gv-page-banner-title {
    font-size: 2.5rem;
    color: var(--gv-secondary);
    letter-spacing: 4px;
    margin-bottom: 12px;
}

.gv-page-banner-desc {
    font-size: 1rem;
    color: var(--gv-text);
    max-width: 600px;
    margin: 0 auto;
}

/* --- 内页内容区 --- */
.gv-page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px;
}

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

.gv-video-card {
    background-color: var(--gv-card-bg);
    border-radius: 4px;
    overflow: hidden;
    transition: box-shadow 0.4s ease;
}

.gv-video-card:hover {
    box-shadow: 0 0 16px rgba(199,162,101,0.25);
}

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

.gv-video-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gv-video-card:hover .gv-video-card-img {
    transform: scale(1.05);
}

.gv-video-card-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    background: rgba(199,162,101,0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gv-video-card:hover .gv-video-card-play {
    opacity: 1;
}

.gv-video-card-play::after {
    content: '';
    display: block;
    width: 0;
    height: 0;
    border-left: 14px solid var(--gv-dark);
    border-top: 9px solid transparent;
    border-bottom: 9px solid transparent;
    margin-left: 3px;
}

.gv-video-card-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.7);
    color: var(--gv-text);
    padding: 2px 8px;
    font-size: 0.75rem;
    border-radius: 2px;
}

.gv-video-card-body {
    padding: 16px;
}

.gv-video-card-title {
    font-size: 1rem;
    color: var(--gv-secondary);
    margin-bottom: 6px;
    font-family: var(--gv-font-title);
    line-height: 1.4;
}

.gv-video-card-meta {
    font-size: 0.8rem;
    color: #999;
}

/* --- 导演专栏页面 --- */
.gv-director-filter {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 32px;
    justify-content: center;
}

.gv-filter-btn {
    padding: 6px 16px;
    border: 1px solid var(--gv-border);
    background: none;
    color: var(--gv-text);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--gv-font-body);
}

.gv-filter-btn:hover,
.gv-filter-btn.gv-filter-active {
    border-color: var(--gv-accent);
    color: var(--gv-accent);
    background-color: rgba(199,162,101,0.1);
}

.gv-director-page-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.gv-director-page-card {
    background-color: var(--gv-card-bg);
    border-radius: 4px;
    overflow: hidden;
    padding: 32px 24px;
    text-align: center;
    transition: box-shadow 0.4s ease, transform 0.3s ease;
}

.gv-director-page-card:hover {
    box-shadow: 0 0 20px rgba(199,162,101,0.25);
    transform: translateY(-4px);
}

.gv-director-page-avatar {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    filter: grayscale(100%);
    margin: 0 auto 20px;
    border: 3px solid var(--gv-border);
    transition: filter 0.4s ease, border-color 0.4s ease;
}

.gv-director-page-card:hover .gv-director-page-avatar {
    filter: grayscale(0%);
    border-color: var(--gv-accent);
}

.gv-director-page-name {
    font-size: 1.2rem;
    color: var(--gv-secondary);
    margin-bottom: 8px;
    font-family: var(--gv-font-title);
}

.gv-director-page-desc {
    font-size: 0.85rem;
    color: #999;
    margin-bottom: 16px;
    line-height: 1.6;
}

.gv-director-page-works {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.gv-director-page-work-thumb {
    width: 80px;
    height: 48px;
    object-fit: cover;
    border-radius: 2px;
    border: 1px solid var(--gv-border);
}

/* --- APP下载独立页面 --- */
.gv-app-page-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.gv-app-page-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
    filter: blur(2px);
}

.gv-app-page-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 60px;
    max-width: 1200px;
    padding: 48px 24px;
}

.gv-app-page-info {
    flex: 1;
}

.gv-app-page-phone {
    flex: 0 0 280px;
}

.gv-app-page-phone-img {
    max-height: 560px;
    display: block;
    margin: 0 auto;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.gv-app-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 32px;
}

.gv-app-feature {
    padding: 20px;
    background-color: rgba(42,42,42,0.8);
    border-radius: 4px;
    border: 1px solid var(--gv-border);
}

.gv-app-feature-title {
    font-size: 1rem;
    color: var(--gv-accent);
    margin-bottom: 6px;
    font-family: var(--gv-font-title);
}

.gv-app-feature-desc {
    font-size: 0.85rem;
    color: var(--gv-text);
    line-height: 1.6;
}

/* --- 响应式断点 --- */
@media (max-width: 1440px) {
    .gv-topics-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 1024px) {
    .gv-topics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .gv-ethnography-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .gv-directors-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .gv-video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .gv-director-page-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .gv-support-layout {
        flex-direction: column;
    }
    .gv-support-img-wrap {
        flex: 1;
        width: 100%;
    }
    .gv-app-layout {
        flex-direction: column;
    }
    .gv-app-mockup-wrap {
        flex: 1;
    }
    .gv-calendar-grid {
        grid-template-columns: 1fr;
    }
    .gv-equipment-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .gv-app-page-content {
        flex-direction: column;
        text-align: center;
    }
    .gv-app-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .gv-nav-list {
        display: none;
    }
    .gv-hamburger {
        display: flex;
    }
    .gv-mobile-nav {
        display: block;
    }
    .gv-hero-title {
        font-size: 2rem;
        letter-spacing: 3px;
    }
    .gv-hero-slogan {
        font-size: 1rem;
        letter-spacing: 4px;
    }
    .gv-section-title {
        font-size: 1.5rem;
    }
    .gv-topics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .gv-ethnography-grid {
        grid-template-columns: 1fr;
    }
    .gv-directors-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .gv-director-avatar {
        width: 100px;
        height: 100px;
    }
    .gv-story-item {
        flex-direction: column;
    }
    .gv-story-img-wrap {
        flex: none;
    }
    .gv-story-content {
        padding: 16px;
    }
    .gv-footer-columns {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .gv-video-grid {
        grid-template-columns: 1fr;
    }
    .gv-director-page-grid {
        grid-template-columns: 1fr;
    }
    .gv-page-banner-title {
        font-size: 1.8rem;
    }
    .gv-app-buttons {
        flex-direction: column;
    }
    .gv-app-page-phone {
        flex: none;
    }
}

@media (max-width: 360px) {
    html {
        font-size: 14px;
    }
    .gv-nav-inner {
        padding: 10px 16px;
    }
    .gv-section {
        padding: 40px 16px;
    }
    .gv-topics-grid {
        grid-template-columns: 1fr;
    }
    .gv-directors-grid {
        grid-template-columns: 1fr;
    }
    .gv-hero-title {
        font-size: 1.6rem;
    }
    .gv-equipment-cards {
        grid-template-columns: 1fr;
    }
}