/* ============================
   91网 - 工业复古Loft风格CSS
   ============================ */

/* CSS变量 */
:root {
    --color-bg: #1a1a1a;
    --color-bg2: #222222;
    --color-bg3: #2a2a2a;
    --color-rust: #8B3A2A;
    --color-rust-light: #C0512A;
    --color-gold: #B8860B;
    --color-gold-light: #D4A017;
    --color-wood: #5C3D1E;
    --color-concrete: #4A4A4A;
    --color-metal: #6B6B6B;
    --color-text: #E0D5C5;
    --color-text-muted: #9A9080;
    --color-border: #3A3A3A;
    --font-main: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.7;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--color-rust-light);
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================
   顶部导航
   ============================ */
.site-header {
    background: linear-gradient(180deg, #0d0d0d 0%, #1a1a1a 100%);
    border-bottom: 2px solid var(--color-rust);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
}

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

.logo h1 {
    font-size: 28px;
    font-weight: 900;
    color: var(--color-rust-light);
    letter-spacing: 3px;
    text-shadow: 0 0 20px rgba(192, 81, 42, 0.5);
    font-style: italic;
}

.main-nav ul {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.main-nav ul li a {
    color: var(--color-text-muted);
    font-size: 14px;
    padding: 8px 14px;
    border: 1px solid transparent;
    border-radius: 2px;
    transition: var(--transition);
    letter-spacing: 1px;
}

.main-nav ul li a:hover {
    color: var(--color-gold-light);
    border-color: var(--color-rust);
    background: rgba(139, 58, 42, 0.15);
}

/* 搜索框 */
.search-bar-container {
    background: #111;
    padding: 10px 0;
    border-top: 1px solid var(--color-border);
}

.fake-search-box {
    display: flex;
    max-width: 700px;
    margin: 0 auto;
    border: 1px solid var(--color-rust);
    border-radius: 2px;
    overflow: hidden;
}

.fake-search-box input {
    flex: 1;
    background: #1e1e1e;
    border: none;
    color: var(--color-text-muted);
    padding: 10px 16px;
    font-size: 14px;
    font-family: var(--font-main);
    cursor: default;
    outline: none;
}

.fake-search-box button {
    background: var(--color-rust);
    color: #fff;
    border: none;
    padding: 10px 24px;
    font-size: 14px;
    font-family: var(--font-main);
    cursor: pointer;
    letter-spacing: 2px;
    transition: var(--transition);
}

.fake-search-box button:hover {
    background: var(--color-rust-light);
}

/* ============================
   首屏Banner
   ============================ */
.hero-banner {
    position: relative;
    height: 90vh;
    min-height: 600px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-banner img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.5) saturate(0.8);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(0,0,0,0.2) 0%,
        rgba(26,10,5,0.6) 60%,
        rgba(10,5,2,0.9) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 0 20px;
}

.hero-content .brand-badge {
    display: inline-block;
    border: 1px solid var(--color-rust);
    color: var(--color-rust-light);
    font-size: 12px;
    letter-spacing: 4px;
    padding: 6px 20px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.hero-content h2 {
    font-size: clamp(36px, 6vw, 72px);
    font-weight: 900;
    line-height: 1.1;
    color: #fff;
    margin-bottom: 16px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.8);
}

.hero-content h2 span {
    color: var(--color-rust-light);
}

.hero-content p {
    font-size: clamp(14px, 2vw, 18px);
    color: var(--color-text-muted);
    margin-bottom: 36px;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--color-rust);
    color: #fff;
    padding: 14px 36px;
    font-size: 15px;
    letter-spacing: 3px;
    border: 2px solid var(--color-rust);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-main);
}

.btn-primary:hover {
    background: var(--color-rust-light);
    border-color: var(--color-rust-light);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    padding: 14px 36px;
    font-size: 15px;
    letter-spacing: 3px;
    border: 2px solid var(--color-metal);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-main);
}

.btn-outline:hover {
    border-color: var(--color-gold-light);
    color: var(--color-gold-light);
}

/* ============================
   通用区块样式
   ============================ */
.section {
    padding: 80px 0;
}

.section-alt {
    background: var(--color-bg2);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header .section-tag {
    display: inline-block;
    font-size: 11px;
    letter-spacing: 5px;
    color: var(--color-rust-light);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: clamp(24px, 4vw, 40px);
    font-weight: 900;
    color: #fff;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 15px;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* 分隔线 */
.divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-rust), transparent);
    margin: 16px auto;
}

/* ============================
   视频卡片
   ============================ */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.video-card {
    background: var(--color-bg3);
    border: 1px solid var(--color-border);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.video-card:hover {
    border-color: var(--color-rust);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(139, 58, 42, 0.3);
}

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

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

/* 金属光泽反射效果 */
.video-thumb::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(
        105deg,
        transparent 40%,
        rgba(200, 180, 140, 0.15) 50%,
        transparent 60%
    );
    transition: left 0.5s ease;
    z-index: 2;
}

.video-card:hover .video-thumb::before {
    left: 150%;
}

/* 锈迹颗粒抖动效果 */
.video-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    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='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.08'/%3E%3C/svg%3E");
    background-size: 150px;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1;
    pointer-events: none;
}

.video-card:hover .video-thumb::after {
    opacity: 1;
    animation: rustShake 0.3s ease infinite alternate;
}

@keyframes rustShake {
    0% { transform: translate(0, 0); }
    100% { transform: translate(1px, 1px); }
}

/* 播放按钮 */
.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    width: 56px;
    height: 56px;
    background: rgba(139, 58, 42, 0.85);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 3;
    border: 2px solid rgba(255,255,255,0.3);
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #fff;
    margin-left: 4px;
}

.video-card:hover .play-btn {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.video-info {
    padding: 16px;
}

.video-info h3 {
    font-size: 15px;
    color: #fff;
    margin-bottom: 8px;
    line-height: 1.4;
    font-weight: 700;
}

.video-info p {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 12px;
    line-height: 1.5;
}

.video-stats {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--color-metal);
}

.video-stats span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.video-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.video-tags .tag {
    font-size: 11px;
    color: var(--color-rust-light);
    border: 1px solid var(--color-rust);
    padding: 2px 8px;
    letter-spacing: 1px;
}

/* ============================
   品牌故事模块
   ============================ */
.story-section {
    background: var(--color-bg2);
}

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

.story-image {
    position: relative;
}

.story-image img {
    width: 100%;
    border: 1px solid var(--color-border);
    filter: sepia(20%) saturate(0.8);
}

.story-image::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: 10px;
    bottom: 10px;
    border: 1px solid var(--color-rust);
    z-index: -1;
}

.story-text h2 {
    font-size: clamp(22px, 3vw, 36px);
    font-weight: 900;
    color: #fff;
    margin-bottom: 20px;
    line-height: 1.3;
}

.story-text p {
    color: var(--color-text-muted);
    margin-bottom: 16px;
    font-size: 15px;
    line-height: 1.8;
}

.story-text .quote {
    border-left: 3px solid var(--color-rust);
    padding-left: 20px;
    font-style: italic;
    color: var(--color-text);
    font-size: 17px;
    margin: 24px 0;
}

/* ============================
   影像作品墙
   ============================ */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

.gallery-item {
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease, filter 0.3s ease;
    filter: saturate(0.7) brightness(0.85);
}

.gallery-item:hover img {
    transform: scale(1.08);
    filter: saturate(1) brightness(1);
}

/* ============================
   AI工坊模块
   ============================ */
.ai-section {
    background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
    position: relative;
    overflow: hidden;
}

.ai-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(139,58,42,0.08) 0%, transparent 60%);
}

.ai-banner {
    position: relative;
    border: 1px solid var(--color-rust);
    overflow: hidden;
    margin-bottom: 40px;
}

.ai-banner img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    filter: brightness(0.6) saturate(0.9);
}

.ai-banner-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 40px;
    z-index: 2;
}

.ai-banner-content h3 {
    font-size: clamp(24px, 4vw, 48px);
    font-weight: 900;
    color: #fff;
    margin-bottom: 12px;
}

.ai-banner-content p {
    font-size: 16px;
    color: var(--color-text-muted);
    max-width: 500px;
    margin-bottom: 24px;
}

.ai-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.ai-tool-card {
    background: var(--color-bg3);
    border: 1px solid var(--color-border);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

.ai-tool-card:hover {
    border-color: var(--color-rust);
    background: rgba(139, 58, 42, 0.1);
}

.ai-tool-card .icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.ai-tool-card h4 {
    font-size: 15px;
    color: #fff;
    margin-bottom: 8px;
}

.ai-tool-card p {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ============================
   创作者模块
   ============================ */
.creators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.creator-card {
    background: var(--color-bg3);
    border: 1px solid var(--color-border);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

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

.creator-card:hover {
    border-color: var(--color-rust);
}

.creator-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 16px;
    border: 3px solid var(--color-rust);
}

.creator-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(0.8);
}

.creator-card h3 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 6px;
}

.creator-card .role {
    font-size: 12px;
    color: var(--color-rust-light);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.creator-card p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ============================
   用户评价
   ============================ */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.review-card {
    background: var(--color-bg3);
    border: 1px solid var(--color-border);
    padding: 24px;
    position: relative;
}

.review-card::before {
    content: '"';
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 80px;
    color: rgba(139, 58, 42, 0.15);
    font-family: Georgia, serif;
    line-height: 1;
}

.review-card .stars {
    color: var(--color-gold-light);
    font-size: 14px;
    margin-bottom: 12px;
}

.review-card p {
    font-size: 14px;
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 16px;
}

.review-card .reviewer {
    font-size: 13px;
    color: var(--color-rust-light);
    font-weight: 700;
}

/* ============================
   FAQ
   ============================ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
    padding: 20px 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.faq-question::before {
    content: 'Q';
    color: var(--color-rust-light);
    font-size: 14px;
    font-weight: 900;
    flex-shrink: 0;
    margin-top: 2px;
}

.faq-answer {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
    padding-left: 26px;
}

/* ============================
   合作伙伴
   ============================ */
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
}

.partner-logo {
    background: var(--color-bg3);
    border: 1px solid var(--color-border);
    padding: 20px 40px;
    font-size: 14px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
    transition: var(--transition);
}

.partner-logo:hover {
    border-color: var(--color-rust);
    color: var(--color-text);
}

/* ============================
   页脚
   ============================ */
.site-footer {
    background: #0d0d0d;
    border-top: 2px solid var(--color-rust);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h2 {
    font-size: 24px;
    color: var(--color-rust-light);
    margin-bottom: 16px;
    font-style: italic;
}

.footer-brand p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 8px;
}

.footer-links h3,
.footer-contact h3 {
    font-size: 14px;
    color: #fff;
    letter-spacing: 2px;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.footer-links ul li {
    margin-bottom: 8px;
}

.footer-links ul li a {
    font-size: 13px;
    color: var(--color-text-muted);
}

.footer-links ul li a:hover {
    color: var(--color-rust-light);
}

.footer-contact p {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.qrcode {
    margin-top: 16px;
    width: 80px;
    height: 80px;
    background: var(--color-bg3);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: var(--color-text-muted);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 24px;
    text-align: center;
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ============================
   内页通用
   ============================ */
.page-hero {
    padding: 80px 0 60px;
    background: linear-gradient(180deg, #0d0d0d 0%, var(--color-bg) 100%);
    border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
    font-size: clamp(28px, 5vw, 52px);
    font-weight: 900;
    color: #fff;
    margin-bottom: 16px;
}

.page-hero p {
    font-size: 16px;
    color: var(--color-text-muted);
    max-width: 600px;
}

.breadcrumb {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.breadcrumb a {
    color: var(--color-rust-light);
}

.breadcrumb span {
    margin: 0 8px;
}

/* ============================
   响应式
   ============================ */
@media (max-width: 1024px) {
    .story-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        gap: 16px;
    }
    
    .main-nav ul {
        justify-content: center;
    }
    
    .main-nav ul li a {
        font-size: 12px;
        padding: 6px 10px;
    }
    
    .hero-banner {
        height: 70vh;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .ai-banner-content {
        padding: 20px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .creators-grid {
        grid-template-columns: 1fr;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================
   滚动条美化
   ============================ */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-rust);
    border-radius: 3px;
}

/* ============================
   懒加载占位
   ============================ */
img[loading="lazy"] {
    background: var(--color-bg3);
}