/* ============================================
   侨韵西关 · 设计师作品展示风格
   ============================================ */

/* ============ CSS 变量 ============ */
:root {
    --bg: #fafaf8;
    --bg-alt: #f3f1ed;
    --card-bg: #ffffff;
    --text: #1a1a1a;
    --text-light: #666;
    --text-muted: #999;
    --border: #e8e5df;
    --accent: #c44536;
    --accent-soft: #e8c4b8;
    --gold: #b8860b;
    --radius: 4px;
    --radius-lg: 12px;
    --transition: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    --font-serif: 'Georgia', 'Noto Serif SC', 'STSong', 'SimSun', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

[data-theme="dark"] {
    --bg: #1a1817;
    --bg-alt: #22201e;
    --card-bg: #2a2725;
    --text: #e8e4e0;
    --text-light: #a8a4a0;
    --text-muted: #6a6662;
    --border: #3a3632;
    --accent: #d4786a;
    --accent-soft: #4a2a22;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
}

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

a {
    color: inherit;
    text-decoration: none;
}

/* ============ 导航 ============ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 40px;
    transition: all var(--transition);
}

.nav.scrolled {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.nav-inner {
    max-width: 1400px;
    margin: 0 auto;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: #fff;
    text-shadow: 0 1px 4px rgba(0,0,0,0.3);
    transition: all var(--transition);
}

.nav.scrolled .nav-logo {
    color: var(--text);
    text-shadow: none;
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.85);
    transition: all var(--transition);
    position: relative;
}

.nav.scrolled .nav-link {
    color: var(--text-light);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: currentColor;
    transition: width var(--transition);
}

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

.nav-theme {
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(255,255,255,0.15);
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.nav.scrolled .nav-theme {
    background: var(--bg-alt);
    color: var(--text);
}

.nav-theme:hover {
    background: rgba(255,255,255,0.25);
}

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

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

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(0,0,0,0.3) 0%,
        rgba(0,0,0,0.15) 40%,
        rgba(0,0,0,0.4) 100%
    );
    z-index: 1;
}

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

.hero-tag {
    font-size: 12px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-bottom: 20px;
    opacity: 0;
    animation: fadeUp 1s ease 0.2s forwards;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(48px, 8vw, 96px);
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1.1;
    margin-bottom: 16px;
    opacity: 0;
    animation: fadeUp 1s ease 0.4s forwards;
}

.hero-subtitle {
    font-size: clamp(16px, 2.5vw, 20px);
    font-weight: 300;
    letter-spacing: 0.08em;
    opacity: 0;
    animation: fadeUp 1s ease 0.6s forwards;
}

.hero-scroll {
    position: absolute;
    bottom: 48px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.7);
    font-size: 12px;
    letter-spacing: 0.15em;
    cursor: pointer;
    opacity: 0;
    animation: fadeUp 1s ease 0.8s forwards;
}

.hero-scroll svg {
    animation: bounceDown 2s ease infinite;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* ============ 作品集区域 ============ */
.works-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 100px 40px;
}

.works-header {
    text-align: center;
    margin-bottom: 64px;
}

.works-label {
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
}

.works-title {
    font-family: var(--font-serif);
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    margin: 12px 0 8px;
    letter-spacing: 0.03em;
}

.works-desc {
    font-size: 15px;
    color: var(--text-light);
}

/* ============ 筛选栏 ============ */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 56px;
}

.filter-btn {
    padding: 8px 22px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-light);
    font-size: 13px;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.04em;
}

.filter-btn:hover {
    border-color: var(--text);
    color: var(--text);
}

.filter-btn.active {
    background: var(--text);
    color: var(--bg);
    border-color: var(--text);
}

/* ============ 作品网格 ============ */
.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 32px;
}

/* ============ 作品卡片 ============ */
.work-card {
    cursor: pointer;
    animation: cardIn 0.6s ease forwards;
    opacity: 0;
}

@keyframes cardIn {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

.work-card-image {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--bg-alt);
}

.work-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.work-card:hover .work-card-image img {
    transform: scale(1.05);
}

.work-card-image .placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 64px;
    color: var(--text-muted);
    background: linear-gradient(135deg, var(--bg-alt), var(--card-bg));
}

/* 卡片悬浮遮罩 */
.work-card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.work-card:hover .work-card-overlay {
    opacity: 1;
}

.work-card-overlay span {
    color: #fff;
    font-size: 14px;
    letter-spacing: 0.1em;
    padding: 10px 28px;
    border: 1px solid rgba(255,255,255,0.6);
    transition: all var(--transition);
}

.work-card:hover .work-card-overlay span {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
}

/* 卡片信息 */
.work-card-info {
    padding: 20px 0 0;
}

.work-card-category {
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 6px;
    font-weight: 600;
}

.work-card-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 4px;
    transition: color var(--transition);
}

.work-card:hover .work-card-title {
    color: var(--accent);
}

.work-card-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============ 空状态 ============ */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.empty-state p {
    margin-top: 16px;
    font-size: 16px;
}

/* ============ 关于区域 ============ */
.about-section {
    background: var(--bg-alt);
    padding: 100px 40px;
    text-align: center;
    transition: background var(--transition);
}

.about-inner {
    max-width: 640px;
    margin: 0 auto;
}

.about-label {
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
}

.about-section h2 {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 700;
    margin: 12px 0 20px;
    letter-spacing: 0.03em;
}

.about-section p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.9;
}

/* ============ 页脚 ============ */
.footer {
    text-align: center;
    padding: 40px;
    border-top: 1px solid var(--border);
    transition: border-color var(--transition);
}

.footer p {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
    letter-spacing: 0.04em;
}

.footer-count {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-count strong {
    color: var(--accent);
    font-weight: 700;
}

/* ============ 响应式 ============ */
@media (max-width: 768px) {
    .nav {
        padding: 0 20px;
    }
    .nav-inner {
        height: 60px;
    }
    .nav-logo {
        font-size: 18px;
    }
    .nav-links {
        display: none;
    }

    .hero {
        min-height: 500px;
    }

    .works-section {
        padding: 60px 20px;
    }
    .works-header {
        margin-bottom: 40px;
    }

    .works-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }

    .about-section {
        padding: 60px 20px;
    }
}

@media (max-width: 480px) {
    .works-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .hero-scroll {
        bottom: 32px;
    }

    .filter-bar {
        gap: 6px;
        margin-bottom: 36px;
    }
    .filter-btn {
        padding: 6px 14px;
        font-size: 12px;
    }
}

/* ============ 滚动条 ============ */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }