/* ============================================================
   17C视频网 · 侘寂禅意美学主样式表
   ============================================================ */

/* ---- 基础重置与字体 ---- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-rice:    #f5f0e8;
    --color-ash:     #d8d4cc;
    --color-wood:    #8b7355;
    --color-ink:     #2c2c2c;
    --color-mist:    #7a9a94;
    --color-clay:    #b5896a;
    --color-paper:   #ede8df;
    --color-shadow:  rgba(44,44,44,0.08);
    --font-main:     'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'STSong', serif;
    --font-mono:     'Courier New', monospace;
    --radius:        4px;
    --transition:    0.35s ease;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--color-rice);
    color: var(--color-ink);
    line-height: 1.8;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--color-mist);
}

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

ul, ol {
    list-style: none;
}

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

/* ---- 顶部导航 ---- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(245,240,232,0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-ash);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 24px;
}

.site-logo {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-ink);
    white-space: nowrap;
}

.site-logo span {
    color: var(--color-mist);
}

.main-nav {
    display: flex;
    gap: 0;
}

.main-nav a {
    display: block;
    padding: 8px 14px;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    color: var(--color-ink);
    border-bottom: 2px solid transparent;
    transition: border-color var(--transition), color var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-mist);
    border-bottom-color: var(--color-mist);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-ink);
    transition: var(--transition);
}

/* ---- 搜索框 ---- */
.search-bar {
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-ash);
    padding: 12px 0;
}

.search-inner {
    display: flex;
    align-items: center;
    max-width: 640px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--color-ash);
    border-radius: 24px;
    padding: 8px 20px;
    gap: 10px;
}

.search-inner svg {
    flex-shrink: 0;
    opacity: 0.45;
}

.search-inner input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: var(--font-main);
    font-size: 0.9rem;
    color: var(--color-ink);
}

.search-inner input::placeholder {
    color: var(--color-ash);
}

/* ---- Hero Banner ---- */
.hero {
    position: relative;
    height: 92vh;
    min-height: 520px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: brightness(0.82) saturate(0.75);
    transition: transform 8s ease;
}

.hero:hover .hero-bg {
    transform: scale(1.03);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(245,240,232,0.15) 0%,
        rgba(44,44,44,0.35) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
    padding: 0 24px;
    max-width: 760px;
}

.hero-eyebrow {
    font-size: 0.8rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    opacity: 0.8;
    margin-bottom: 16px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 300;
    line-height: 1.25;
    letter-spacing: 0.08em;
    margin-bottom: 20px;
    text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.hero-sub {
    font-size: 1rem;
    opacity: 0.85;
    margin-bottom: 36px;
    line-height: 1.7;
}

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

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.7);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.15);
}

/* ---- 通用区块 ---- */
.section {
    padding: 80px 0;
}

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

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-mist);
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 300;
    letter-spacing: 0.08em;
    color: var(--color-ink);
    margin-bottom: 12px;
}

.section-desc {
    font-size: 0.9rem;
    color: var(--color-wood);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.9;
}

/* ---- 视频卡片网格 ---- */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 28px;
}

.video-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 12px var(--color-shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(44,44,44,0.12);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--color-ash);
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease, filter 0.6s ease;
}

.video-card:hover .video-thumb img {
    transform: scale(1.06);
    filter: brightness(0.75) saturate(0.8);
}

/* 光影斑驳纹理呼吸效果 */
.video-thumb::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 40%, rgba(255,255,255,0.18) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 70%, rgba(181,137,106,0.12) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.6s ease;
    z-index: 1;
    pointer-events: none;
}

.video-card:hover .video-thumb::before {
    opacity: 1;
    animation: breathe 3s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% { opacity: 0.6; }
    50%       { opacity: 1; }
}

/* 播放按钮 */
.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.7);
    width: 52px;
    height: 52px;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.35s ease, transform 0.35s ease;
    z-index: 2;
}

.play-btn svg {
    width: 20px;
    height: 20px;
    fill: var(--color-mist);
    margin-left: 3px;
}

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

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 10px;
    background: rgba(44,44,44,0.72);
    color: #fff;
    font-size: 0.72rem;
    padding: 2px 7px;
    border-radius: 3px;
    z-index: 2;
}

.video-info {
    padding: 16px;
}

.video-title {
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 10px;
    color: var(--color-ink);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    gap: 14px;
    font-size: 0.75rem;
    color: var(--color-wood);
}

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

/* ---- 品牌故事 ---- */
.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.story-img {
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.story-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.story-text h2 {
    font-size: 1.6rem;
    font-weight: 300;
    letter-spacing: 0.06em;
    margin-bottom: 20px;
    color: var(--color-ink);
}

.story-text p {
    font-size: 0.92rem;
    color: var(--color-wood);
    line-height: 2;
    margin-bottom: 16px;
}

.story-divider {
    width: 40px;
    height: 1px;
    background: var(--color-mist);
    margin: 24px 0;
}

/* ---- 影像墙 ---- */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.gallery-item {
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: var(--radius);
    cursor: pointer;
}

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

.gallery-item:hover img {
    transform: scale(1.08);
    filter: brightness(0.85) saturate(0.8);
}

/* ---- AI模块 ---- */
.ai-section {
    background: var(--color-ink);
    color: var(--color-rice);
}

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

.ai-img {
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4/3;
    opacity: 0.85;
}

.ai-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ai-text .section-label {
    color: var(--color-mist);
}

.ai-text h2 {
    font-size: 1.6rem;
    font-weight: 300;
    letter-spacing: 0.06em;
    margin-bottom: 20px;
    color: var(--color-rice);
}

.ai-text p {
    font-size: 0.92rem;
    color: var(--color-ash);
    line-height: 2;
    margin-bottom: 16px;
}

.ai-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 28px;
}

.ai-feature-item {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 16px;
}

.ai-feature-item h4 {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-mist);
    margin-bottom: 6px;
}

.ai-feature-item p {
    font-size: 0.78rem;
    color: var(--color-ash);
    margin: 0;
    line-height: 1.7;
}

/* ---- 达人模块 ---- */
.creator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 28px;
}

.creator-card {
    text-align: center;
    padding: 24px 16px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 2px 12px var(--color-shadow);
    transition: transform var(--transition);
}

.creator-card:hover {
    transform: translateY(-4px);
}

.creator-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 14px;
    border: 2px solid var(--color-ash);
}

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

.creator-name {
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--color-ink);
}

.creator-role {
    font-size: 0.78rem;
    color: var(--color-mist);
    margin-bottom: 10px;
}

.creator-fans {
    font-size: 0.75rem;
    color: var(--color-wood);
}

/* ---- 用户评价 ---- */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.review-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: 0 2px 12px var(--color-shadow);
    border-left: 3px solid var(--color-mist);
}

.review-text {
    font-size: 0.88rem;
    color: var(--color-ink);
    line-height: 1.9;
    margin-bottom: 16px;
    font-style: italic;
}

.review-author {
    font-size: 0.8rem;
    color: var(--color-wood);
    font-weight: 500;
}

.review-stars {
    color: var(--color-clay);
    font-size: 0.8rem;
    margin-bottom: 10px;
}

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

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

.faq-question {
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    padding: 20px 0;
    font-family: var(--font-main);
    font-size: 0.95rem;
    color: var(--color-ink);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: color var(--transition);
}

.faq-question:hover {
    color: var(--color-mist);
}

.faq-question .faq-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: 1px solid currentColor;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    line-height: 1;
    transition: transform var(--transition);
}

.faq-item.open .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding: 0 0 20px;
    font-size: 0.88rem;
    color: var(--color-wood);
    line-height: 1.9;
}

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

/* ---- 合作伙伴 ---- */
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin-bottom: 48px;
}

.partner-logo {
    width: 120px;
    height: 56px;
    background: var(--color-paper);
    border: 1px solid var(--color-ash);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: var(--color-wood);
    letter-spacing: 0.05em;
    transition: border-color var(--transition), color var(--transition);
}

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

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

.contact-block h3 {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    margin-bottom: 16px;
    color: var(--color-ink);
}

.contact-block p,
.contact-block address {
    font-size: 0.88rem;
    color: var(--color-wood);
    font-style: normal;
    line-height: 2;
}

.qr-placeholder {
    width: 100px;
    height: 100px;
    background: var(--color-paper);
    border: 1px solid var(--color-ash);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    color: var(--color-wood);
    text-align: center;
    margin-top: 12px;
}

/* ---- 页脚 ---- */
.site-footer {
    background: var(--color-ink);
    color: var(--color-ash);
    padding: 48px 0 24px;
}

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

.footer-brand .site-logo {
    color: var(--color-rice);
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 0.82rem;
    line-height: 1.8;
    color: var(--color-ash);
}

.footer-links h4,
.footer-social h4 {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-rice);
    margin-bottom: 16px;
    letter-spacing: 0.06em;
}

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

.footer-links ul li a {
    font-size: 0.82rem;
    color: var(--color-ash);
    transition: color var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.78rem;
    color: rgba(216,212,204,0.6);
}

.footer-bottom a {
    color: inherit;
    transition: color var(--transition);
}

.footer-bottom a:hover {
    color: var(--color-mist);
}

/* ---- 内页 Banner ---- */
.page-hero {
    position: relative;
    height: 40vh;
    min-height: 280px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.page-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: brightness(0.7) saturate(0.7);
}

.page-hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(44,44,44,0.3);
}

.page-hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
}

.page-hero-content h1 {
    font-size: clamp(1.6rem, 4vw, 2.8rem);
    font-weight: 300;
    letter-spacing: 0.12em;
    margin-bottom: 10px;
}

.page-hero-content p {
    font-size: 0.9rem;
    opacity: 0.8;
    letter-spacing: 0.08em;
}

/* ---- 面包屑 ---- */
.breadcrumb {
    padding: 14px 0;
    font-size: 0.8rem;
    color: var(--color-wood);
    border-bottom: 1px solid var(--color-ash);
}

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

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

.breadcrumb span {
    margin: 0 8px;
    opacity: 0.5;
}

/* ---- 文章卡片 ---- */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
}

.article-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 12px var(--color-shadow);
    transition: transform var(--transition);
}

.article-card:hover {
    transform: translateY(-4px);
}

.article-thumb {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.article-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.article-card:hover .article-thumb img {
    transform: scale(1.06);
}

.article-body {
    padding: 20px;
}

.article-tag {
    display: inline-block;
    font-size: 0.72rem;
    color: var(--color-mist);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.article-title {
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 10px;
    color: var(--color-ink);
}

.article-excerpt {
    font-size: 0.82rem;
    color: var(--color-wood);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 14px;
    font-size: 0.75rem;
    color: var(--color-ash);
}

/* ---- 分页 ---- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 56px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-ash);
    border-radius: var(--radius);
    font-size: 0.85rem;
    color: var(--color-ink);
    transition: all var(--transition);
}

.pagination a:hover,
.pagination .current {
    background: var(--color-mist);
    border-color: var(--color-mist);
    color: #fff;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .story-grid,
    .ai-inner {
        grid-template-columns: 1fr;
        gap: 36px;
    }

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

    .footer-inner {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-rice);
        border-bottom: 1px solid var(--color-ash);
        flex-direction: column;
        padding: 12px 0;
    }

    .main-nav.open {
        display: flex;
    }

    .main-nav a {
        padding: 12px 24px;
        border-bottom: none;
        border-left: 2px solid transparent;
    }

    .main-nav a:hover,
    .main-nav a.active {
        border-left-color: var(--color-mist);
        border-bottom-color: transparent;
    }

    .nav-toggle {
        display: flex;
    }

    .header-inner {
        position: relative;
    }

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

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

    .footer-inner {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .hero-title {
        font-size: 1.8rem;
    }
}

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

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

    .ai-features {
        grid-template-columns: 1fr;
    }
}

/* ---- 懒加载占位 ---- */
img[data-src] {
    opacity: 0;
    transition: opacity 0.4s ease;
}

img.loaded {
    opacity: 1;
}

/* ---- 滚动动画 ---- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: none;
}