/* ============================================
   国产风华 - 主样式文件
   设计风格: 中国红国潮风
   CSS前缀: gc-
   ============================================ */

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

:root {
    --gc-primary: #C0392B;
    --gc-secondary: #FDFEFE;
    --gc-accent: #F1C40F;
    --gc-text: #17202A;
    --gc-link: #D35400;
    --gc-primary-dark: #96281B;
    --gc-primary-light: #E74C3C;
    --gc-gold-gradient: linear-gradient(135deg, #F1C40F, #D4AC0D, #F1C40F);
    --gc-red-gradient: linear-gradient(135deg, #C0392B, #E74C3C, #C0392B);
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    color: var(--gc-text);
    background-color: var(--gc-secondary);
    line-height: 1.8;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Source Han Serif CN', 'Noto Serif SC', 'SimSun', serif;
    font-weight: 700;
    line-height: 1.4;
}

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

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

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

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

/* --- 导航栏 --- */
#gc-header {
    background-color: var(--gc-secondary);
    border-bottom: 2px solid var(--gc-primary);
    z-index: 1000;
    width: 100%;
}

.gc-nav-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.gc-logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
}

.gc-logo-wrap img {
    height: 45px;
    width: 45px;
}

.gc-logo-text {
    font-family: 'Source Han Serif CN', 'Noto Serif SC', serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gc-primary);
    letter-spacing: 2px;
}

.gc-nav-list {
    list-style: none;
    display: flex;
    gap: 28px;
    align-items: center;
}

.gc-nav-list li a {
    font-size: 0.95rem;
    color: var(--gc-text);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    text-decoration: none;
    transition: color 0.3s ease;
}

.gc-nav-list li a:hover,
.gc-nav-list li a.gc-active {
    color: var(--gc-link);
}

.gc-nav-list li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--gc-link);
    transition: width 0.3s ease;
}

.gc-nav-list li a:hover::after,
.gc-nav-list li a.gc-active::after {
    width: 100%;
}

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

.gc-hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--gc-text);
    transition: all 0.3s ease;
}

/* --- Hero Banner --- */
#gc-hero {
    position: relative;
    width: 100%;
    height: 85vh;
    min-height: 500px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gc-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.gc-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(192, 57, 43, 0.5) 0%,
        rgba(23, 32, 42, 0.7) 100%
    );
    z-index: 2;
}

.gc-hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 20px;
    max-width: 800px;
}

.gc-hero-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto 30px;
    filter: drop-shadow(0 4px 20px rgba(241, 196, 15, 0.5));
}

.gc-hero-content h1 {
    font-size: 2.8rem;
    color: var(--gc-secondary);
    text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
    margin-bottom: 20px;
    letter-spacing: 4px;
}

.gc-hero-slogan {
    font-size: 1.2rem;
    color: var(--gc-accent);
    font-family: 'Source Han Serif CN', 'Noto Serif SC', serif;
    letter-spacing: 3px;
    text-shadow: 1px 1px 4px rgba(0,0,0,0.5);
}

/* --- 通用模块样式 --- */
.gc-section {
    padding: 80px 20px;
    max-width: 1440px;
    margin: 0 auto;
}

.gc-section-header {
    text-align: center;
    margin-bottom: 50px;
}

.gc-section-header h2 {
    font-size: 2rem;
    color: var(--gc-text);
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.gc-section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gc-gold-gradient);
}

.gc-section-header p {
    margin-top: 15px;
    font-size: 1rem;
    color: #666;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* --- 国货之光 (横向滚动卡片) --- */
.gc-scroll-container {
    overflow-x: auto;
    padding: 20px 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--gc-primary) transparent;
}

.gc-scroll-container::-webkit-scrollbar {
    height: 6px;
}

.gc-scroll-container::-webkit-scrollbar-track {
    background: transparent;
}

.gc-scroll-container::-webkit-scrollbar-thumb {
    background-color: var(--gc-primary);
    border-radius: 3px;
}

.gc-card-row {
    display: flex;
    gap: 24px;
    padding: 0 10px;
    width: max-content;
}

.gc-video-card {
    width: 320px;
    flex-shrink: 0;
    background: #fff;
    border: 1px solid #eee;
    overflow: hidden;
    transition: all 0.4s ease;
    position: relative;
}

.gc-video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(192, 57, 43, 0.15);
    border-color: var(--gc-accent);
}

.gc-video-card:hover::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 2px solid var(--gc-accent);
    z-index: 1;
    animation: gc-glow 2s ease-in-out infinite;
}

@keyframes gc-glow {
    0%, 100% { box-shadow: 0 0 5px var(--gc-accent); }
    50% { box-shadow: 0 0 20px var(--gc-accent), 0 0 40px rgba(241, 196, 15, 0.3); }
}

.gc-card-thumb {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    overflow: hidden;
}

.gc-card-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.gc-card-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background: rgba(192, 57, 43, 0.85);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 2;
}

.gc-card-play::after {
    content: '';
    border-style: solid;
    border-width: 8px 0 8px 14px;
    border-color: transparent transparent transparent #fff;
    margin-left: 3px;
}

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

.gc-card-info {
    padding: 16px;
}

.gc-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gc-text);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.gc-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: #999;
}

/* --- 主播殿堂 (排行榜) --- */
.gc-rank-list {
    max-width: 800px;
    margin: 0 auto;
}

.gc-rank-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 18px 24px;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.3s ease;
}

.gc-rank-item:hover {
    background: rgba(192, 57, 43, 0.03);
}

.gc-rank-num {
    font-family: 'Source Han Serif CN', 'Noto Serif SC', serif;
    font-size: 1.5rem;
    font-weight: 700;
    width: 40px;
    text-align: center;
    color: #999;
}

.gc-rank-item:nth-child(1) .gc-rank-num,
.gc-rank-item:nth-child(2) .gc-rank-num,
.gc-rank-item:nth-child(3) .gc-rank-num {
    color: var(--gc-accent);
}

.gc-rank-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid #eee;
    flex-shrink: 0;
}

.gc-rank-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gc-rank-info {
    flex: 1;
}

.gc-rank-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--gc-text);
}

.gc-rank-desc {
    font-size: 0.8rem;
    color: #999;
    margin-top: 2px;
}

.gc-rank-heat {
    font-size: 0.9rem;
    color: var(--gc-primary);
    font-weight: 600;
    white-space: nowrap;
}

/* --- 匠心独运 (瀑布流) --- */
.gc-masonry {
    columns: 3;
    column-gap: 24px;
}

.gc-masonry-item {
    break-inside: avoid;
    margin-bottom: 24px;
    background: #fff;
    border: 1px solid #eee;
    overflow: hidden;
    transition: all 0.4s ease;
}

.gc-masonry-item:hover {
    box-shadow: 0 8px 30px rgba(192, 57, 43, 0.15);
    border-color: var(--gc-accent);
}

.gc-masonry-item img {
    width: 100%;
    display: block;
    transition: transform 0.4s ease;
}

.gc-masonry-item:hover img {
    transform: scale(1.03);
}

.gc-masonry-info {
    padding: 16px;
}

.gc-masonry-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.gc-masonry-desc {
    font-size: 0.85rem;
    color: #666;
    line-height: 1.6;
}

/* --- 华夏霓裳 (大图卡片) --- */
.gc-fashion-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.gc-fashion-card {
    position: relative;
    overflow: hidden;
    border: 1px solid #eee;
    aspect-ratio: 4/3;
}

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

.gc-fashion-card:hover img {
    transform: scale(1.08);
}

.gc-fashion-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px 20px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    color: #fff;
}

.gc-fashion-overlay h3 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.gc-fashion-overlay p {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* --- 风物之旅 --- */
.gc-travel-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.gc-travel-card {
    position: relative;
    overflow: hidden;
    border: 1px solid #eee;
    aspect-ratio: 16/9;
}

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

.gc-travel-card:hover img {
    transform: scale(1.05);
}

.gc-travel-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px 15px 15px;
    background: linear-gradient(to top, rgba(192, 57, 43, 0.8), transparent);
    color: #fff;
}

.gc-travel-overlay h3 {
    font-size: 1rem;
}

/* --- 原创认证 CTA --- */
#gc-certification-cta {
    background: var(--gc-red-gradient);
    padding: 80px 20px;
    text-align: center;
    color: #fff;
}

#gc-certification-cta h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: #fff;
}

#gc-certification-cta p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.9;
    line-height: 1.8;
}

.gc-btn-gold {
    display: inline-block;
    padding: 14px 40px;
    background: var(--gc-gold-gradient);
    color: var(--gc-text);
    font-weight: 700;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 2px;
    text-decoration: none;
}

.gc-btn-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(241, 196, 15, 0.4);
    text-decoration: none;
    color: var(--gc-text);
}

.gc-btn-red {
    display: inline-block;
    padding: 14px 40px;
    background: var(--gc-primary);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    border: 2px solid var(--gc-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 2px;
    text-decoration: none;
}

.gc-btn-red:hover {
    background: var(--gc-primary-dark);
    border-color: var(--gc-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(192, 57, 43, 0.3);
    text-decoration: none;
    color: #fff;
}

/* --- 品牌合作 --- */
.gc-brand-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.gc-brand-item {
    background: #fff;
    border: 1px solid #eee;
    padding: 30px 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.gc-brand-item:hover {
    border-color: var(--gc-accent);
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.gc-brand-item img {
    max-height: 60px;
    margin: 0 auto 15px;
}

.gc-brand-item h4 {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.gc-brand-item p {
    font-size: 0.8rem;
    color: #999;
}

/* --- APP下载 --- */
#gc-app-section {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    padding: 80px 20px;
    color: #fff;
}

.gc-app-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
}

.gc-app-info {
    flex: 1;
}

.gc-app-info h2 {
    font-size: 2.2rem;
    color: var(--gc-accent);
    margin-bottom: 15px;
}

.gc-app-info .gc-app-subtitle {
    font-size: 1.1rem;
    opacity: 0.8;
    margin-bottom: 30px;
    line-height: 1.8;
}

.gc-app-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.gc-app-mockup {
    flex: 1;
    max-width: 500px;
}

.gc-app-mockup img {
    width: 100%;
    border-radius: 10px;
}

/* --- 平台公约 --- */
#gc-guidelines {
    background: #faf8f5;
    padding: 80px 20px;
}

.gc-guidelines-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.gc-guidelines-container img {
    max-width: 600px;
    margin: 0 auto 30px;
    border-radius: 4px;
}

.gc-guidelines-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    text-align: left;
    margin-top: 30px;
}

.gc-guideline-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 15px;
    background: #fff;
    border-left: 3px solid var(--gc-primary);
}

.gc-guideline-icon {
    width: 24px;
    height: 24px;
    background: var(--gc-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

.gc-guideline-text h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.gc-guideline-text p {
    font-size: 0.85rem;
    color: #666;
}

/* --- 页脚 --- */
#gc-footer {
    background: var(--gc-text);
    color: #ccc;
    padding: 60px 20px 30px;
}

.gc-footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.gc-footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.gc-footer-col h3 {
    color: var(--gc-accent);
    font-size: 1rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(241, 196, 15, 0.3);
}

.gc-footer-col ul {
    list-style: none;
}

.gc-footer-col ul li {
    margin-bottom: 10px;
}

.gc-footer-col ul li a {
    color: #aaa;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    text-decoration: none;
}

.gc-footer-col ul li a:hover {
    color: var(--gc-accent);
    text-decoration: none;
}

.gc-social-links {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.gc-social-link {
    width: 36px;
    height: 36px;
    border: 1px solid #555;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #aaa;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

.gc-social-link:hover {
    border-color: var(--gc-accent);
    color: var(--gc-accent);
}

.gc-footer-bottom {
    border-top: 1px solid #333;
    padding-top: 25px;
    text-align: center;
}

.gc-footer-badge {
    margin-bottom: 15px;
    font-size: 0.85rem;
    color: var(--gc-accent);
}

.gc-footer-icp {
    font-size: 0.8rem;
    color: #888;
    margin-bottom: 10px;
}

.gc-footer-icp a {
    color: #888;
    text-decoration: none;
}

.gc-footer-icp a:hover {
    color: var(--gc-accent);
    text-decoration: none;
}

.gc-footer-copyright {
    font-size: 0.8rem;
    color: #666;
}

/* --- 栏目页通用 --- */
.gc-page-banner {
    position: relative;
    height: 350px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gc-page-banner img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gc-page-banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(192, 57, 43, 0.6), rgba(23, 32, 42, 0.8));
}

.gc-page-banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
}

.gc-page-banner-content h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
}

.gc-page-banner-content p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 栏目页视频网格 */
.gc-video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.gc-grid-card {
    background: #fff;
    border: 1px solid #eee;
    overflow: hidden;
    transition: all 0.4s ease;
}

.gc-grid-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(192, 57, 43, 0.15);
    border-color: var(--gc-accent);
}

.gc-grid-thumb {
    position: relative;
    padding-top: 56.25%;
    overflow: hidden;
}

.gc-grid-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.gc-grid-card:hover .gc-grid-thumb img {
    transform: scale(1.05);
}

.gc-grid-info {
    padding: 14px;
}

.gc-grid-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.gc-grid-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: #999;
}

/* 栏目页描述区 */
.gc-page-desc {
    max-width: 900px;
    margin: 0 auto;
    padding: 50px 20px;
    text-align: center;
}

.gc-page-desc p {
    font-size: 1rem;
    line-height: 2;
    color: #555;
}

/* --- 原创认证页面 --- */
.gc-cert-hero {
    background: var(--gc-red-gradient);
    padding: 80px 20px;
    text-align: center;
    color: #fff;
}

.gc-cert-hero h1 {
    font-size: 3rem;
    color: var(--gc-accent);
    text-shadow: 2px 2px 10px rgba(0,0,0,0.3);
    margin-bottom: 20px;
}

.gc-cert-sections {
    max-width: 1100px;
    margin: 0 auto;
    padding: 60px 20px;
}

.gc-cert-block {
    margin-bottom: 50px;
}

.gc-cert-block h2 {
    font-size: 1.8rem;
    color: var(--gc-primary);
    margin-bottom: 25px;
    padding-left: 15px;
    border-left: 4px solid var(--gc-accent);
}

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

.gc-cert-adv-item {
    background: #fff;
    border: 1px solid #eee;
    padding: 30px 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.gc-cert-adv-item:hover {
    border-color: var(--gc-accent);
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.gc-cert-adv-icon {
    width: 60px;
    height: 60px;
    background: var(--gc-red-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 15px;
    border-radius: 50%;
}

.gc-cert-adv-item h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.gc-cert-adv-item p {
    font-size: 0.85rem;
    color: #666;
}

.gc-cert-conditions {
    list-style: none;
}

.gc-cert-conditions li {
    padding: 15px 20px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 0.95rem;
}

.gc-cert-conditions li .gc-check {
    width: 24px;
    height: 24px;
    background: var(--gc-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    flex-shrink: 0;
}

.gc-cert-steps {
    display: flex;
    gap: 20px;
}

.gc-cert-step {
    flex: 1;
    text-align: center;
    padding: 30px 15px;
    background: #fff;
    border: 1px solid #eee;
    position: relative;
}

.gc-cert-step-num {
    width: 40px;
    height: 40px;
    background: var(--gc-gold-gradient);
    color: var(--gc-text);
    font-weight: 700;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    border-radius: 50%;
}

.gc-cert-step h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.gc-cert-step p {
    font-size: 0.85rem;
    color: #666;
}

/* 认证表单 */
.gc-cert-form {
    max-width: 700px;
    margin: 0 auto;
    padding: 40px;
    background: #fff;
    border: 1px solid #eee;
}

.gc-form-group {
    margin-bottom: 20px;
}

.gc-form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.gc-form-group input,
.gc-form-group textarea,
.gc-form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
    background: #fafafa;
}

.gc-form-group input:focus,
.gc-form-group textarea:focus {
    outline: none;
    border-color: var(--gc-primary);
    background: #fff;
}

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

.gc-form-submit {
    text-align: center;
    margin-top: 30px;
}

.gc-form-submit button {
    padding: 14px 50px;
    background: var(--gc-primary);
    color: #fff;
    border: none;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.gc-form-submit button:hover {
    background: var(--gc-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(192, 57, 43, 0.3);
}

/* 提交成功提示 */
.gc-form-success {
    display: none;
    text-align: center;
    padding: 40px;
    background: #f0fdf4;
    border: 1px solid #86efac;
}

.gc-form-success h3 {
    color: #16a34a;
    margin-bottom: 10px;
}

.gc-form-success p {
    color: #666;
}

/* --- APP下载页面 --- */
.gc-app-hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.gc-app-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.3);
}

.gc-app-hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 60px;
    max-width: 1200px;
    padding: 40px 20px;
}

.gc-app-phone {
    max-width: 450px;
    flex-shrink: 0;
}

.gc-app-phone img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.gc-app-text {
    color: #fff;
}

.gc-app-text h1 {
    font-size: 2.5rem;
    color: var(--gc-accent);
    margin-bottom: 15px;
}

.gc-app-text .gc-app-sub {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 30px;
    line-height: 1.8;
}

.gc-download-btns {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* --- 分页 --- */
.gc-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.gc-pagination a,
.gc-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid #ddd;
    color: var(--gc-text);
    font-size: 0.9rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.gc-pagination a:hover,
.gc-pagination span.gc-page-active {
    background: var(--gc-primary);
    color: #fff;
    border-color: var(--gc-primary);
    text-decoration: none;
}

/* --- 面包屑 --- */
.gc-breadcrumb {
    padding: 15px 20px;
    max-width: 1440px;
    margin: 0 auto;
    font-size: 0.85rem;
    color: #999;
}

.gc-breadcrumb a {
    color: #999;
    text-decoration: none;
}

.gc-breadcrumb a:hover {
    color: var(--gc-link);
    text-decoration: none;
}

.gc-breadcrumb span {
    margin: 0 8px;
}

/* ============================================
   响应式设计 - Mobile First
   ============================================ */

/* 360px - 767px (移动端) */
@media (max-width: 767px) {
    .gc-nav-list {
        display: none;
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--gc-primary);
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 0;
        z-index: 9999;
        transition: right 0.3s ease;
    }

    .gc-nav-list.gc-nav-open {
        display: flex;
        right: 0;
    }

    .gc-nav-list li a {
        color: var(--gc-accent);
        font-size: 1.1rem;
        padding: 12px 0;
        display: block;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .gc-nav-list li a:hover,
    .gc-nav-list li a.gc-active {
        color: #fff;
    }

    .gc-nav-list li a::after {
        display: none;
    }

    .gc-hamburger {
        display: flex;
        z-index: 10000;
    }

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

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

    .gc-hamburger.gc-active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .gc-nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 9998;
    }

    .gc-nav-overlay.gc-show {
        display: block;
    }

    #gc-hero {
        height: 60vh;
        min-height: 400px;
    }

    .gc-hero-content h1 {
        font-size: 1.8rem;
        letter-spacing: 2px;
    }

    .gc-hero-slogan {
        font-size: 0.95rem;
    }

    .gc-hero-logo {
        width: 80px;
        height: 80px;
    }

    .gc-section {
        padding: 50px 15px;
    }

    .gc-section-header h2 {
        font-size: 1.5rem;
    }

    .gc-masonry {
        columns: 1;
    }

    .gc-fashion-grid {
        grid-template-columns: 1fr;
    }

    .gc-travel-grid {
        grid-template-columns: 1fr;
    }

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

    .gc-video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .gc-app-container,
    .gc-app-hero-content {
        flex-direction: column;
        text-align: center;
    }

    .gc-app-buttons,
    .gc-download-btns {
        justify-content: center;
    }

    .gc-guidelines-list {
        grid-template-columns: 1fr;
    }

    .gc-footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .gc-page-banner {
        height: 250px;
    }

    .gc-page-banner-content h1 {
        font-size: 1.8rem;
    }

    .gc-cert-advantages {
        grid-template-columns: 1fr;
    }

    .gc-cert-steps {
        flex-direction: column;
    }

    .gc-cert-form {
        padding: 20px;
    }

    .gc-cert-hero h1 {
        font-size: 2rem;
    }

    .gc-app-phone {
        max-width: 300px;
    }

    .gc-rank-item {
        padding: 12px 15px;
    }
}

/* 768px - 1023px (平板) */
@media (min-width: 768px) and (max-width: 1023px) {
    .gc-nav-list {
        gap: 16px;
    }

    .gc-nav-list li a {
        font-size: 0.85rem;
    }

    .gc-masonry {
        columns: 2;
    }

    .gc-video-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

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

/* 1024px - 1439px (桌面) */
@media (min-width: 1024px) and (max-width: 1439px) {
    .gc-video-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 1440px+ (大屏) */
@media (min-width: 1440px) {
    .gc-section {
        padding: 100px 40px;
    }

    .gc-hero-content h1 {
        font-size: 3.2rem;
    }
}

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

.gc-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.gc-animate.gc-visible {
    opacity: 1;
    transform: translateY(0);
}