/*
 * Miller Tischler - 现代建筑/设计事务所 样式表
 * 风格：现代简约、画廊杂志感、专业权威
 */

/* 1. CSS变量定义 */
:root {
    /* 颜色变量 */
    --color-bg: #fdfdfd;
    --color-bg-alt: #f4f4f4;
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #666666;
    --color-accent: #000000;
    --color-white: #ffffff;
    --color-border: #e0e0e0;

    /* 字体变量 */
    --font-serif: "Cormorant Garamond", "Didot", serif;
    --font-sans: "Inter", "Helvetica Neue", "Arial", sans-serif;

    /* 间距变量 */
    --space-unit: 1rem;
    --space-xs: calc(var(--space-unit) * 0.5);   /* 8px */
    --space-sm: var(--space-unit);               /* 16px */
    --space-md: calc(var(--space-unit) * 2);     /* 32px */
    --space-lg: calc(var(--space-unit) * 4);     /* 64px */
    --space-xl: calc(var(--space-unit) * 8);     /* 128px */
    --container-max: 1440px;

    /* 过渡效果 */
    --transition-base: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 2. 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

h1, h2, h3, h4, .serif {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.1;
}

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

ul {
    list-style: none;
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: 1.2rem 2.5rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn:hover {
    background-color: var(--color-text-secondary);
}

.btn-arrow::after {
    content: "→";
    margin-left: var(--space-sm);
    transition: transform 0.3s ease;
}

.btn-arrow:hover::after {
    transform: translateX(5px);
}

/* 3. 组件样式 */

/* 导航栏 (Header) */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--space-md) 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background-color: rgba(253, 253, 253, 0.9);
    backdrop-filter: blur(10px);
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--space-md);
}

.nav-link {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

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

/* 首屏 (Hero Section) */
.hero {
    padding: var(--space-xl) 5% var(--space-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6.5rem);
    margin-bottom: var(--space-md);
    max-width: 1200px;
}

.hero-intro {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-bottom: var(--space-lg);
}

.hero-image {
    width: 100%;
    height: 70vh;
    object-fit: cover;
}

/* 项目展示区 (Selected Works - Asymmetric Grid) */
.works-grid {
    padding: var(--space-xl) 5%;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-lg) var(--space-md);
}

.work-card {
    grid-column: span 6;
    position: relative;
}

/* 创造非对称感 */
.work-card:nth-child(even) {
    margin-top: var(--space-xl);
}

.work-card.wide {
    grid-column: span 8;
}

.work-card.narrow {
    grid-column: span 4;
}

.work-image-wrapper {
    overflow: hidden;
    margin-bottom: var(--space-sm);
}

.work-image {
    width: 100%;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.work-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.work-title {
    font-size: 1.5rem;
    margin-bottom: 0.2rem;
}

.work-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    letter-spacing: 0.1em;
}

.work-arrow {
    font-size: 1.2rem;
}

/* 哲学/介绍区 (Philosophy) */
.philosophy {
    padding: var(--space-xl) 5%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    background-color: var(--color-bg-alt);
}

.section-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: var(--space-md);
    display: block;
}

.philosophy-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
}

.philosophy-content p {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

/* 联系/表单区 (Contact) */
.contact {
    padding: var(--space-xl) 5%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    margin-bottom: var(--space-xs);
}

.form-input {
    width: 100%;
    border: none;
    border-bottom: 1px solid var(--color-accent);
    background: transparent;
    padding: var(--space-sm) 0;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.form-input:focus {
    border-bottom-color: var(--color-text-secondary);
}

/* 页脚 (Footer) */
.footer {
    padding: var(--space-lg) 5%;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-socials {
    display: flex;
    gap: var(--space-md);
}

/* 4. 响应式媒体查询 */

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
    .works-grid {
        gap: var(--space-md);
    }
    
    .work-card, .work-card.wide, .work-card.narrow {
        grid-column: span 6;
    }
    
    .work-card:nth-child(even) {
        margin-top: var(--space-lg);
    }
    
    .philosophy, .contact {
        gap: var(--space-lg);
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    .header {
        padding: var(--space-sm) 5%;
    }

    .nav-links {
        display: none; /* 在实际项目中通常替换为汉堡菜单 */
    }

    .hero {
        padding-top: var(--space-xl);
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .works-grid {
        display: block;
    }

    .work-card {
        margin-bottom: var(--space-lg);
        width: 100%;
    }

    .work-card:nth-child(even) {
        margin-top: 0;
    }

    .philosophy, .contact {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        padding: var(--space-lg) 5%;
    }

    .footer {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

/* 5. 实用工具类 */
.mt-0 { margin-top: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.text-uppercase { text-transform: uppercase; letter-spacing: 0.1em; }
.text-muted { color: var(--color-text-secondary); }

.container {
    max-width: var(--container-max);
    margin: 0 auto;
}

/* 图片占位背景 */
.img-placeholder {
    background-color: var(--color-bg-alt);
    aspect-ratio: 16/9;
}