/**
 * Main Styles - Suki+Partners
 * 首页专用样式
 * 依赖: design-tokens.css
 */

/* ========================================
 * 基础重置与全局样式
 * ======================================== */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    background: url('../assets/images/background.png') fixed center/cover;
    overflow-x: hidden;
}

/* 无障碍：焦点样式 */
:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* 无障碍：仅屏幕阅读器可见 */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
 * 通用布局组件
 * ======================================== */

.page-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl) var(--space-md);
    position: relative;
}

.content-wrapper {
    max-width: var(--container-max);
    width: 100%;
    margin: 0 auto;
}

/* ========================================
 * 导航栏
 * ======================================== */

.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: var(--space-5) var(--space-lg);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-normal);
}

.nav-bar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-content {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    letter-spacing: var(--letter-spacing-wider);
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
}

.nav-logo:hover {
    color: var(--color-primary-500);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    letter-spacing: var(--letter-spacing-wide);
    padding: var(--space-2) var(--space-1);
    position: relative;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-primary-500);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-links a:hover {
    color: var(--color-primary-600);
}

.nav-links a:hover::after {
    width: 100%;
}

/* ========================================
 * 封面页
 * ======================================== */

.cover-page {
    text-align: center;
    animation: fadeIn var(--duration-slower) var(--ease-out);
}

.cover-illustration {
    max-width: 600px;
    width: 100%;
    margin: 0 auto var(--space-lg);
    animation: floatUp var(--duration-slow) var(--ease-out);
}

.cover-illustration img {
    width: 100%;
    height: auto;
    filter: drop-shadow(var(--shadow-lg));
}

.logo-section {
    margin-top: var(--space-xl);
    animation: fadeIn var(--duration-slower) var(--ease-out) 0.3s both;
}

.logo-section img {
    max-width: 400px;
    width: 100%;
    height: auto;
    transition: transform var(--transition-slow);
}

.logo-section img:hover {
    transform: scale(1.02);
}

/* 滚动提示 */
.scroll-hint {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s var(--ease-in-out) infinite;
    cursor: pointer;
}

.scroll-hint::after {
    content: '↓';
    font-size: var(--font-size-xl);
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
}

.scroll-hint:hover::after {
    color: var(--color-primary-500);
}

/* ========================================
 * 介绍页
 * ======================================== */

.intro-page {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.intro-text {
    font-size: var(--font-size-md);
    line-height: var(--line-height-loose);
    color: var(--color-text-secondary);
}

/* 主标题样式 */
.intro-text h1 {
    font-family: var(--font-family-display);
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-light);
    margin-bottom: var(--space-lg);
    color: var(--color-text-primary);
    letter-spacing: 0.15em;
    line-height: 1.4;
    position: relative;
    padding-bottom: var(--space-md);
}

/* 标题下划线装饰 */
.intro-text h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, var(--color-primary-400), transparent);
}

/* 段落通用样式 */
.intro-text p {
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp var(--duration-slow) var(--ease-out) forwards;
    text-align: justify;
    text-justify: inter-ideograph;
}

/* 首段 - 品牌介绍，稍大字号 */
.intro-text p:first-of-type {
    font-size: var(--font-size-lg);
    line-height: 2;
    letter-spacing: 0.08em;
    color: var(--color-text-primary);
    animation-delay: 0.1s;
}

/* 第二段 - 核心理念，强调显示 */
.intro-text p:nth-of-type(2) {
    font-size: var(--font-size-md);
    line-height: 2.2;
    letter-spacing: 0.06em;
    color: var(--color-text-secondary);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-primary-300);
    animation-delay: 0.2s;
}

/* 第三段 - 设计哲学，诗意排版 */
.intro-text p:nth-of-type(3) {
    font-size: var(--font-size-base);
    line-height: 2.4;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    font-style: italic;
    animation-delay: 0.3s;
}

/* 关键词强调样式 */
.intro-text strong {
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    position: relative;
}

/* 关键词下划线装饰 */
.intro-text p:first-of-type strong {
    background: linear-gradient(180deg, transparent 60%, rgba(180, 160, 140, 0.15) 60%);
    padding: 0 2px;
}

.intro-illustration {
    text-align: center;
}

.intro-illustration img {
    max-width: 500px;
    width: 100%;
    height: auto;
    transition: transform var(--transition-slow);
}

.intro-illustration img:hover {
    transform: scale(1.03) rotate(1deg);
}

/* ========================================
 * 目录页 / 作品集
 * ======================================== */

.catalog-page {
    text-align: center;
}

.catalog-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-light);
    margin-bottom: var(--space-2xl);
    letter-spacing: var(--letter-spacing-widest);
    color: var(--color-text-primary);
    position: relative;
}

.catalog-title::after {
    content: '';
    position: absolute;
    bottom: calc(-1 * var(--space-4));
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary-400), transparent);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.catalog-item {
    position: relative;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    border-radius: var(--radius-lg);
    transition: transform var(--transition-normal);
}

.catalog-item:hover {
    transform: translateY(-8px);
}

.catalog-item:focus-visible {
    outline-offset: 4px;
}

.catalog-item-image {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: box-shadow var(--transition-normal);
}

.catalog-item:hover .catalog-item-image {
    box-shadow: var(--shadow-xl);
}

.catalog-item-shadow {
    position: absolute;
    bottom: calc(-1 * var(--space-5));
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    height: 30px;
    opacity: 0.25;
    transition: opacity var(--transition-normal);
}

.catalog-item:hover .catalog-item-shadow {
    opacity: 0.35;
}

.catalog-item-title {
    margin-top: var(--space-md);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-normal);
    letter-spacing: var(--letter-spacing-wider);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.catalog-item:hover .catalog-item-title {
    color: var(--color-primary-600);
}

.catalog-illustration {
    margin-top: var(--space-xl);
}

.catalog-illustration img {
    max-width: 300px;
    width: 100%;
    opacity: 0.85;
    transition: opacity var(--transition-normal), transform var(--transition-slow);
}

.catalog-illustration img:hover {
    opacity: 1;
    transform: scale(1.05);
}

/* ========================================
 * 页脚
 * ======================================== */

.footer {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
    background: var(--color-bg-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.footer-illustration {
    max-width: 400px;
    margin: 0 auto var(--space-lg);
}

.footer-illustration img {
    width: 100%;
    transition: transform var(--transition-slow);
}

.footer-illustration img:hover {
    transform: scale(1.02);
}

.footer-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.footer-text p {
    margin-bottom: var(--space-2);
}

.footer-contact {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.footer-contact p {
    margin-bottom: var(--space-2);
}

.footer-contact a {
    color: var(--color-primary-500);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
    position: relative;
}

.footer-contact a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-primary-500);
    transition: width var(--transition-normal);
}

.footer-contact a:hover {
    color: var(--color-primary-600);
}

.footer-contact a:hover::after {
    width: 100%;
}

/* ========================================
 * 动画关键帧
 * ======================================== */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-12px);
    }
    60% {
        transform: translateX(-50%) translateY(-6px);
    }
}

/* 滚动触发动画 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
}

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

/* ========================================
 * 响应式布局
 * ======================================== */

@media (max-width: 1024px) {
    .intro-page {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        text-align: center;
    }

    .intro-text h1::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .intro-text p {
        text-align: center;
    }

    .intro-text p:nth-of-type(2) {
        border-left: none;
        padding-left: 0;
        border-top: 1px solid var(--color-primary-300);
        border-bottom: 1px solid var(--color-primary-300);
        padding: var(--space-md) 0;
    }

    .intro-illustration {
        order: -1;
    }

    .catalog-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }

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

@media (max-width: 768px) {
    .page-section {
        padding: var(--space-lg) var(--space-sm);
    }

    .nav-bar {
        padding: var(--space-4) var(--space-sm);
    }

    .nav-content {
        flex-direction: column;
        gap: var(--space-4);
    }

    .nav-links {
        gap: var(--space-sm);
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-links a {
        font-size: var(--font-size-sm);
    }

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

    .catalog-title {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--space-lg);
    }

    .catalog-item-title {
        font-size: var(--font-size-lg);
    }

    .intro-text h1 {
        font-size: var(--font-size-xl);
        letter-spacing: 0.1em;
    }

    .intro-text p:first-of-type {
        font-size: var(--font-size-base);
        line-height: 1.9;
    }

    .intro-text p:nth-of-type(2),
    .intro-text p:nth-of-type(3) {
        font-size: var(--font-size-sm);
        line-height: 2;
    }

    .footer {
        padding: var(--space-lg) var(--space-sm);
    }
}

/* ========================================
 * 打印样式
 * ======================================== */

@media print {
    .nav-bar,
    .scroll-hint {
        display: none;
    }

    .page-section {
        min-height: auto;
        padding: var(--space-lg) 0;
    }

    body {
        background: white;
    }
}