/* --- 核心美学定义 --- */
:root {
    --paper-base: #f7f3e8; 
    --ink-color: #38302e;
    --seal-red: #8a3b34; 
    --font-title: 'Zen Old Mincho', serif;
    --font-body: 'Zen Old Mincho', 'Noto Serif SC', serif;
}

/* --- 基础设定 --- */
body {
    margin: 0;
    padding: 0;
    background-color: var(--paper-base);
    color: var(--ink-color);
    font-family: var(--font-body);
    overflow-x: hidden;
    position: relative;
    line-height: 2;
}

/* 纸张纹理 */
.paper-texture {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.6;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.15'/%3E%3C/svg%3E");
    mix-blend-mode: multiply;
}

/* 通用图片样式 */
.wabi-sabi-img {
    display: block;
    width: 100%;
    height: auto;
    filter: contrast(0.95) brightness(1.02) sepia(0.15) drop-shadow(0 10px 20px rgba(56, 48, 46, 0.15));
    transition: all 1s ease-in-out;
    mask-image: radial-gradient(white 80%, transparent 100%); 
    -webkit-mask-image: radial-gradient(white 85%, transparent 100%);
}
.wabi-sabi-img:hover {
    filter: contrast(1) brightness(1.08) sepia(0);
    transform: scale(1.01);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    position: relative;
    z-index: 1;
}

/* 头部 */
header { padding: 60px 0; text-align: center; }

/* Logo 样式 */
.logo-box {
    display: inline-block;
    border: 2px solid var(--seal-red);
    padding: 15px 25px;
    color: var(--seal-red);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.5em;
    mask-image: url("data:image/svg+xml,%3Csvg width='100' height='100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.5' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.5'/%3E%3C/svg%3E");
    -webkit-mask-image: linear-gradient(black 80%, transparent 100%); 
}

.logo-sub { margin-top: 15px; font-size: 0.8rem; letter-spacing: 0.3em; opacity: 0.7; }

/* 导航 */
.nav-vertical {
    position: fixed;
    right: 40px; top: 50%; transform: translateY(-50%);
    writing-mode: vertical-rl; z-index: 100; height: 300px;
    display: flex; justify-content: space-between;
}
.nav-vertical a {
    text-decoration: none; color: var(--ink-color); font-size: 0.9rem; letter-spacing: 0.3em; transition: color 0.5s; position: relative;
    font-family: var(--font-title);
}
.nav-vertical a::before {
    content: ''; position: absolute; top: -15px; left: 50%; transform: translateX(-50%);
    width: 6px; height: 6px; border-radius: 50%; background: var(--seal-red); opacity: 0; transition: opacity 0.5s;
}
.nav-vertical a:hover { color: var(--seal-red); }
.nav-vertical a:hover::before { opacity: 1; }

/* --- Hero --- */
.hero { display: flex; align-items: center; justify-content: center; min-height: 80vh; position: relative; margin-bottom: 50px; }
.hero-content { display: grid; grid-template-columns: 1.2fr 0.8fr; align-items: center; gap: 60px; }
.hero-text { writing-mode: vertical-rl; height: 400px; display: flex; justify-content: center; }
.hero-title { font-size: 3rem; line-height: 1.8; margin-left: 40px; font-family: var(--font-title); }
.hero-poet { font-size: 1rem; color: var(--seal-red); margin-top: 50px; }

/* --- 藏品展示 --- */
.collection-section { padding: 100px 0; }
.section-header-center { text-align: center; margin-bottom: 80px; }
.section-header-center h2 { font-size: 2rem; font-weight: normal; font-family: var(--font-title); margin: 0; }
.sub-en { font-size: 0.7rem; letter-spacing: 0.3em; color: #999; text-transform: uppercase; margin-top: 10px; display: block; }

/* 分类入口卡片 */
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 60px; }
.category-card { text-decoration: none; color: var(--ink-color); display: block; position: relative; overflow: hidden; }
.category-img-wrap { width: 100%; height: 450px; overflow: hidden; position: relative; }
.category-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s ease; filter: sepia(0.2) contrast(0.9); }
.category-card:hover .category-img-wrap img { transform: scale(1.1); filter: sepia(0) contrast(1); }
.category-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.2); transition: background 0.5s; }
.category-card:hover .category-overlay { background: rgba(0,0,0,0.1); }
.category-label {
    position: absolute; top: 30px; right: 30px; writing-mode: vertical-rl;
    background: rgba(247, 243, 232, 0.9); padding: 20px 10px;
    font-family: var(--font-title); font-size: 1.4rem; letter-spacing: 0.3em;
    border: 1px solid rgba(56, 48, 46, 0.2); box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    z-index: 10; transition: all 0.5s;
}
.category-card:hover .category-label { background: var(--seal-red); color: #fff; border-color: var(--seal-red); }
.category-card:hover .category-label span { color: rgba(255,255,255,0.8); }

/* --- 企业简介板块 --- */
.about-section {
    padding: 120px 0;
    background: linear-gradient(to bottom, transparent, rgba(138, 59, 52, 0.03), transparent);
    position: relative;
}

.bg-char {
    position: absolute;
    top: 10%;
    left: 5%;
    font-size: 15rem;
    font-family: var(--font-title);
    color: var(--ink-color);
    opacity: 0.03;
    pointer-events: none;
    z-index: -1;
}

.about-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 60px;
    align-items: start;
}

.section-title-v {
    writing-mode: vertical-rl;
    font-size: 2.2rem;
    letter-spacing: 0.2em;
    border-right: 1px solid rgba(56, 48, 46, 0.2);
    padding-right: 30px;
    height: 300px;
    font-family: var(--font-title);
    position: relative;
}

.section-title-v::before {
    content: '';
    position: absolute; top: -20px; right: -5px;
    width: 10px; height: 10px; background: var(--seal-red);
    border-radius: 50%;
}

.about-content h3 {
    font-size: 1.4rem;
    margin-top: 0;
    margin-bottom: 30px;
    color: var(--ink-color);
    font-weight: 500;
}

.about-content p {
    margin-bottom: 25px;
    text-align: justify;
    color: #5d5553;
    max-width: 800px;
}

.highlight-text {
    color: var(--seal-red);
    font-weight: 500;
}

/* --- 核心业务 --- */
.services-section {
    padding: 100px 0;
    text-align: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.service-card {
    padding: 30px 20px;
    border: 1px solid rgba(56, 48, 46, 0.1);
    transition: all 0.5s ease;
    position: relative;
}

.service-card:hover {
    border-color: var(--seal-red);
    background-color: rgba(255,255,255,0.4);
}

.kamon-circle {
    width: 60px; height: 60px;
    border: 1px solid var(--ink-color);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    font-family: var(--font-title);
    position: relative;
}

.kamon-circle::after {
    content: ''; position: absolute; top: 3px; left: 3px; right: 3px; bottom: 3px;
    border: 1px solid rgba(56, 48, 46, 0.3); border-radius: 50%;
}

.service-title { font-size: 1.1rem; margin-bottom: 10px; font-weight: bold; }
.service-desc { font-size: 0.85rem; color: #777; line-height: 1.8; }

/* --- 页脚 --- */
footer { padding: 80px 0; text-align: center; border-top: 1px solid rgba(56, 48, 46, 0.1); font-size: 0.9rem; }
.footer-seal { width: 36px; height: 36px; background: var(--seal-red); color: #f7f3e8; margin: 0 auto 25px; line-height: 36px; border-radius: 4px; }
.page-hint { display: block; margin-top: 15px; font-style: italic; opacity: 0.7; font-size: 0.85em; }

/* 动画 */
.fade-in-up { opacity: 0; transform: translateY(20px); animation: fadeInUp 1s forwards; }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }

/* 响应式 */
@media (max-width: 768px) {
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-text { writing-mode: horizontal-tb; height: auto; margin-top: 30px; display: block; }
    .hero-title { margin-left: 0; font-size: 2rem; }
    .about-layout { grid-template-columns: 1fr; gap: 30px; }
    .section-title-v { writing-mode: horizontal-tb; height: auto; border-right: none; border-bottom: 1px solid #ccc; padding-bottom: 20px; }
    .section-title-v::before { display: none; }
    .services-grid { grid-template-columns: 1fr 1fr; }
    .category-grid { grid-template-columns: 1fr; }
    .category-img-wrap { height: 300px; }
    .nav-vertical { display: none; }
}