/* ============================================
   老段 · 个人作品集
   Creative Director Portfolio
   ============================================ */

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --text-primary: #f5f5f5;
    --text-secondary: #a8a8a8;
    --text-tertiary: #6a6a6a;
    --accent: #c8102e;          /* 篆刻红 */
    --accent-soft: #d63547;
    --border: #1f1f1f;
    --border-light: #2a2a2a;
    --serif: 'Noto Serif SC', 'Songti SC', 'STSong', 'Source Han Serif SC', serif;
    --sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    --mono: 'JetBrains Mono', 'Courier New', monospace;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    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(--sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: default;
}

::selection {
    background: var(--accent);
    color: var(--bg-primary);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s var(--ease);
}

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

/* ============================================
   顶部导航
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 24px 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all 0.4s var(--ease);
}

.nav.scrolled {
    background: rgba(10, 10, 10, 0.92);
    border-bottom: 1px solid var(--border);
    padding: 16px 48px;
}

.nav-logo {
    height: 44px;
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    border: 1.5px solid var(--accent);
    padding: 6px 10px;
    transition: all 0.4s var(--ease);
}

.nav-logo:hover {
    background: var(--accent);
}

.nav-logo img {
    height: 100%;
    width: auto;
    transition: transform 0.4s var(--ease);
}

.nav-logo:hover img {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.4s var(--ease);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
}

/* ============================================
   全屏首屏（个人介绍）
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 48px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(200, 16, 46, 0.08), transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(200, 16, 46, 0.05), transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text .greeting {
    font-family: var(--serif);
    font-size: 14px;
    letter-spacing: 6px;
    color: var(--accent);
    margin-bottom: 24px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 16px;
}

.hero-text .greeting::before {
    content: '';
    width: 32px;
    height: 1px;
    background: var(--accent);
}

.hero-text h1 {
    font-family: var(--serif);
    font-size: clamp(48px, 7vw, 96px);
    font-weight: 600;
    line-height: 1.05;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-text h1 .chinese {
    display: block;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.hero-text h1 .english {
    display: block;
    font-size: 0.4em;
    color: var(--text-secondary);
    letter-spacing: 8px;
    font-weight: 300;
    font-family: var(--sans);
}

.hero-text .tagline {
    font-family: var(--serif);
    font-size: 22px;
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 540px;
    font-weight: 300;
}

.hero-text .tagline .highlight {
    color: var(--accent);
    font-weight: 500;
}

.hero-text .intro {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
    max-width: 520px;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 48px;
    margin-bottom: 40px;
    padding: 24px 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.hero-stats .stat {
    flex: 1;
}

.hero-stats .num {
    font-family: var(--serif);
    font-size: 40px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.hero-stats .num::after {
    content: attr(data-suffix);
    font-size: 0.5em;
    color: var(--accent);
    margin-left: 2px;
}

.hero-stats .label {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border: 1px solid var(--text-primary);
    background: transparent;
    color: var(--text-primary);
    font-family: var(--sans);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.4s var(--ease);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--text-primary);
    transform: translateY(100%);
    transition: transform 0.4s var(--ease);
    z-index: -1;
}

.btn:hover {
    color: var(--bg-primary);
}

.btn:hover::before {
    transform: translateY(0);
}

.btn-primary {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-primary::before {
    background: var(--accent);
}

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

.btn .arrow {
    transition: transform 0.4s var(--ease);
}

.btn:hover .arrow {
    transform: translateX(4px);
}

/* Hero 右侧品牌印章装饰 */
.hero-visual {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.seal {
    width: 420px;
    height: 420px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transform: rotate(-3deg);
    transition: transform 0.6s var(--ease);
}

.seal:hover {
    transform: rotate(0) scale(1.03);
}

.seal-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 20px 40px rgba(200, 16, 46, 0.4));
}

.seal-text {
    font-family: var(--serif);
    color: var(--text-primary);
    text-align: center;
    line-height: 1.1;
    padding: 20px;
}

.seal-text .top {
    font-size: 18px;
    letter-spacing: 8px;
    margin-bottom: 16px;
    display: block;
}

.seal-text .name {
    font-size: 80px;
    font-weight: 700;
    display: block;
    letter-spacing: 12px;
    margin: 12px 0;
    text-indent: 12px;
}

.seal-text .bottom {
    font-size: 14px;
    letter-spacing: 4px;
    display: block;
    margin-top: 12px;
}

.floating-tag {
    position: absolute;
    font-family: var(--serif);
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: 3px;
    padding: 8px 16px;
    border: 1px solid var(--border-light);
    background: var(--bg-secondary);
    animation: float 6s ease-in-out infinite;
}

.floating-tag.t1 {
    top: 8%;
    right: 0;
    animation-delay: 0s;
}

.floating-tag.t2 {
    bottom: 12%;
    left: 0;
    animation-delay: 2s;
}

.floating-tag.t3 {
    top: 50%;
    right: -40px;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ============================================
   Section 通用
   ============================================ */
section {
    padding: 120px 48px;
    position: relative;
}

.section-header {
    max-width: 1200px;
    margin: 0 auto 80px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 40px;
    flex-wrap: wrap;
}

.section-title {
    font-family: var(--serif);
    font-size: clamp(40px, 5vw, 64px);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -1px;
}

.section-title .en {
    display: block;
    font-family: var(--sans);
    font-size: 0.3em;
    letter-spacing: 6px;
    color: var(--text-tertiary);
    font-weight: 300;
    margin-top: 16px;
    text-transform: uppercase;
}

.section-meta {
    text-align: right;
    color: var(--text-tertiary);
    font-size: 13px;
    letter-spacing: 2px;
}

.section-meta .count {
    font-family: var(--serif);
    font-size: 64px;
    color: var(--accent);
    font-weight: 600;
    line-height: 1;
    display: block;
    margin-bottom: 8px;
    letter-spacing: -2px;
}

/* ============================================
   关于我
   ============================================ */
.about {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.about-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: start;
}

.about-photo {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
}

.about-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(0.3) contrast(1.05);
    transition: transform 0.8s var(--ease), filter 0.8s var(--ease);
}

.about-photo:hover img {
    transform: scale(1.05);
    filter: grayscale(0) contrast(1.1);
}

.about-photo::before {
    content: '';
    position: absolute;
    top: 24px;
    left: 24px;
    right: 24px;
    bottom: 24px;
    border: 1px solid rgba(200, 16, 46, 0.4);
    z-index: 1;
    pointer-events: none;
    transition: all 0.6s var(--ease);
}

.about-photo:hover::before {
    top: 12px;
    left: 12px;
    right: 12px;
    bottom: 12px;
    border-color: var(--accent);
}

.about-photo .photo-tag {
    position: absolute;
    bottom: 32px;
    left: 32px;
    z-index: 2;
    font-family: var(--serif);
    color: var(--text-primary);
    font-size: 13px;
    letter-spacing: 3px;
}

.about-photo .photo-tag .year {
    color: var(--accent);
    font-weight: 600;
}

.about-content h3 {
    font-family: var(--serif);
    font-size: 36px;
    margin-bottom: 24px;
    line-height: 1.3;
    font-weight: 500;
}

.about-content .lead {
    font-family: var(--serif);
    font-size: 20px;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 32px;
    font-weight: 300;
}

.about-content .lead .red {
    color: var(--accent);
    font-weight: 500;
}

.about-content p {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 20px;
    font-size: 15px;
}

.about-content .signature {
    margin-top: 48px;
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 32px;
    border-top: 1px solid var(--border-light);
}

.about-content .signature .name {
    font-family: var(--serif);
    font-size: 24px;
    font-weight: 500;
}

.about-content .signature .name .real-name {
    font-family: var(--sans);
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 400;
    letter-spacing: 1px;
    margin-left: 4px;
}

.about-content .signature .title {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 2px;
    margin-top: 4px;
}

.about-content .signature .seal-mini {
    width: 60px;
    height: 60px;
    background: var(--accent);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--serif);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 2px;
    transform: rotate(-4deg);
}

.timeline {
    margin-top: 64px;
    padding-top: 48px;
    border-top: 1px solid var(--border-light);
}

.timeline h4 {
    font-family: var(--serif);
    font-size: 18px;
    margin-bottom: 32px;
    color: var(--text-primary);
    letter-spacing: 2px;
}

.timeline-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 24px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    transition: padding 0.3s var(--ease);
}

.timeline-item:hover {
    padding-left: 8px;
}

.timeline-item .year {
    font-family: var(--serif);
    color: var(--accent);
    font-size: 16px;
    font-weight: 500;
}

.timeline-item .event {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.timeline-item .event strong {
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   作品分类导航
   ============================================ */
.categories {
    padding: 80px 48px 0;
}

.categories-list {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.category-card {
    padding: 60px 48px;
    border-right: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
    transition: all 0.5s var(--ease);
    cursor: pointer;
    display: block;
}

.category-card:nth-child(2n) {
    border-right: none;
}

.category-card:nth-last-child(-n+2) {
    border-bottom: none;
}

.category-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.5s var(--ease);
    z-index: 0;
}

.category-card:hover::before {
    transform: scaleY(1);
}

.category-card:hover {
    color: var(--bg-primary);
}

.category-card > * {
    position: relative;
    z-index: 1;
    transition: color 0.5s var(--ease);
}

.category-num {
    font-family: var(--mono);
    font-size: 14px;
    color: var(--accent);
    margin-bottom: 32px;
    letter-spacing: 2px;
    transition: color 0.5s var(--ease);
}

.category-card:hover .category-num {
    color: var(--bg-primary);
}

.category-name {
    font-family: var(--serif);
    font-size: 48px;
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.category-name .en {
    display: block;
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 4px;
    color: var(--text-tertiary);
    margin-top: 12px;
    text-transform: uppercase;
}

.category-card:hover .category-name .en {
    color: rgba(10, 10, 10, 0.6);
}

.category-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 380px;
}

.category-card:hover .category-desc {
    color: rgba(10, 10, 10, 0.7);
}

.category-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.category-tag {
    padding: 4px 12px;
    border: 1px solid var(--border-light);
    font-size: 11px;
    letter-spacing: 1px;
    color: var(--text-tertiary);
    transition: all 0.3s var(--ease);
}

.category-card:hover .category-tag {
    border-color: rgba(10, 10, 10, 0.3);
    color: var(--bg-primary);
}

.category-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-top: 16px;
    color: var(--accent);
    transition: gap 0.3s var(--ease);
}

.category-card:hover .category-link {
    color: var(--bg-primary);
}

.category-link .arrow {
    transition: transform 0.3s var(--ease);
}

.category-card:hover .category-link .arrow {
    transform: translateX(8px);
}

/* ============================================
   作品集
   ============================================ */
.works {
    padding-top: 120px;
}

.works-intro {
    max-width: 1200px;
    margin: 0 auto 64px;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.8;
    max-width: 720px;
}

.works-intro strong {
    color: var(--text-primary);
    font-weight: 500;
}

.works-filter {
    max-width: 1200px;
    margin: 0 auto 64px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 24px;
}

.filter-btn {
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-size: 13px;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s var(--ease);
}

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

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

/* ============================================
   作品网格
   ============================================ */
.works-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.work-card {
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: transform 0.5s var(--ease);
}

.work-card:hover {
    transform: translateY(-8px);
}

.work-card:nth-child(7n+1) { grid-column: span 2; }
.work-card:nth-child(7n+4) { grid-column: span 2; }
.work-card.featured-large { grid-column: span 2; }

.work-image {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.work-card.featured-large .work-image,
.work-card:nth-child(7n+1) .work-image,
.work-card:nth-child(7n+4) .work-image {
    aspect-ratio: 4/3;
}

.work-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    transition: transform 0.8s var(--ease-out), filter 0.6s var(--ease);
    filter: grayscale(0.2) brightness(0.9);
}

.work-card:hover .work-image img {
    transform: scale(1.08);
    filter: grayscale(0) brightness(1);
}

.work-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 30%, rgba(10, 10, 10, 0.95) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 32px;
    opacity: 0;
    transition: opacity 0.5s var(--ease);
}

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

.work-overlay .year {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.work-overlay h3 {
    font-family: var(--serif);
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.3;
    font-weight: 500;
}

.work-overlay p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.work-overlay .view {
    font-size: 12px;
    color: var(--accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.work-overlay .view .arrow {
    transition: transform 0.3s var(--ease);
}

.work-card:hover .work-overlay .view .arrow {
    transform: translateX(4px);
}

.work-meta {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 1px;
}

.work-meta .brand {
    color: var(--text-primary);
    font-family: var(--serif);
    font-size: 14px;
}

.work-meta .arrow {
    color: var(--accent);
    transition: transform 0.3s var(--ease);
}

.work-card:hover .work-meta .arrow {
    transform: translateX(4px);
}

/* ============================================
   服务/能力
   ============================================ */
.services {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.services-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid var(--border-light);
}

.service-item {
    padding: 48px 32px;
    border-right: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    transition: background 0.4s var(--ease);
}

.service-item:hover {
    background: var(--bg-tertiary);
}

.service-item:nth-child(3n) { border-right: none; }
.service-item:nth-last-child(-n+3) { border-bottom: none; }

.service-num {
    font-family: var(--mono);
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 24px;
}

.service-item h3 {
    font-family: var(--serif);
    font-size: 24px;
    margin-bottom: 16px;
    line-height: 1.3;
    font-weight: 500;
}

.service-item p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
}

/* ============================================
   联系
   ============================================ */
.contact {
    text-align: center;
    padding: 160px 48px;
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 50% 50%, rgba(200, 16, 46, 0.1), transparent 60%);
    pointer-events: none;
}

.contact-inner {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.contact .label {
    font-family: var(--serif);
    font-size: 14px;
    color: var(--accent);
    letter-spacing: 6px;
    margin-bottom: 32px;
    text-transform: uppercase;
}

.contact h2 {
    font-family: var(--serif);
    font-size: clamp(48px, 6vw, 80px);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 32px;
    letter-spacing: -1px;
}

.contact h2 .accent {
    color: var(--accent);
}

.contact .lead {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 48px;
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.contact-card {
    padding: 32px 40px;
    border: 1px solid var(--border-light);
    background: var(--bg-secondary);
    text-align: left;
    min-width: 240px;
    transition: all 0.4s var(--ease);
    cursor: pointer;
    display: block;
}

.contact-card:hover {
    border-color: var(--accent);
    background: var(--bg-tertiary);
    transform: translateY(-4px);
}

.contact-card .method {
    font-size: 12px;
    color: var(--accent);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.contact-card .value {
    font-family: var(--serif);
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 500;
}

.contact-card .note {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 1px;
}

.contact-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 64px 48px 32px;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    height: 44px;
    margin-bottom: 16px;
    background: var(--bg-primary);
    border: 1.5px solid var(--accent);
    padding: 6px 10px;
    width: auto;
    box-sizing: content-box;
}

.footer-brand p {
    color: var(--text-tertiary);
    font-size: 13px;
    line-height: 1.7;
    max-width: 320px;
}

.footer-col h4 {
    font-family: var(--serif);
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 20px;
    letter-spacing: 2px;
    font-weight: 500;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    color: var(--text-tertiary);
    font-size: 13px;
    transition: color 0.3s var(--ease);
}

.footer-col a:hover {
    color: var(--accent);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 1px;
}

.footer-bottom .left {
    font-family: var(--serif);
}

.footer-bottom .right {
    display: flex;
    gap: 24px;
}

/* ============================================
   入场动画
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-stagger {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.fade-in-stagger.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
    .nav { padding: 20px 32px; }
    .nav.scrolled { padding: 14px 32px; }
    section { padding: 80px 32px; }
    .hero { padding: 100px 32px 60px; }
    .hero-content { grid-template-columns: 1fr; gap: 60px; }
    .hero-visual { height: 400px; }
    .seal { width: 280px; height: 280px; }
    .seal-text .name { font-size: 60px; }
    .about-grid { grid-template-columns: 1fr; gap: 48px; }
    .works-grid { grid-template-columns: repeat(2, 1fr); }
    .work-card:nth-child(7n+1) { grid-column: span 2; }
    .work-card:nth-child(7n+4) { grid-column: span 2; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .service-item:nth-child(3n) { border-right: 1px solid var(--border-light); }
    .service-item:nth-child(2n) { border-right: none; }
    .service-item:nth-last-child(-n+3) { border-bottom: 1px solid var(--border-light); }
    .service-item:nth-last-child(-n+2) { border-bottom: none; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .categories-list { grid-template-columns: 1fr; }
    .category-card { border-right: none; }
    .category-card:last-child { border-bottom: none; }
}

@media (max-width: 768px) {
    .nav { padding: 16px 20px; }
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 360px;
        height: 100vh;
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: center;
        padding: 48px;
        transition: right 0.4s var(--ease);
        border-left: 1px solid var(--border);
    }
    .nav-links.open { right: 0; }
    .nav-toggle { display: block; z-index: 101; }
    section { padding: 60px 20px; }
    .hero { padding: 100px 20px 60px; }
    .hero-content { gap: 48px; }
    .hero-text h1 { font-size: 48px; }
    .hero-stats { gap: 24px; }
    .hero-stats .num { font-size: 32px; }
    .works-grid { grid-template-columns: 1fr; }
    .work-card:nth-child(7n+1),
    .work-card:nth-child(7n+4) { grid-column: span 1; }
    .work-card:nth-child(7n+1) .work-image,
    .work-card:nth-child(7n+4) .work-image { aspect-ratio: 4/3; }
    .services-grid { grid-template-columns: 1fr; }
    .service-item { border-right: none; }
    .service-item:last-child { border-bottom: none; }
    .footer-inner { grid-template-columns: 1fr; }
    .contact { padding: 100px 20px; }
    .contact-card { width: 100%; min-width: 0; }
    .timeline-item { grid-template-columns: 70px 1fr; gap: 16px; }
}

/* ============================================
   案例分类页专有
   ============================================ */
.page-hero {
    padding: 200px 48px 80px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.page-hero .breadcrumb {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 3px;
    margin-bottom: 32px;
    text-transform: uppercase;
}

.page-hero .breadcrumb a:hover {
    color: var(--accent);
}

.page-hero h1 {
    font-family: var(--serif);
    font-size: clamp(48px, 7vw, 96px);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.page-hero h1 .accent {
    color: var(--accent);
}

.page-hero h1 .en {
    display: block;
    font-family: var(--sans);
    font-size: 0.3em;
    letter-spacing: 6px;
    color: var(--text-tertiary);
    font-weight: 300;
    margin-top: 16px;
    text-transform: uppercase;
}

.page-hero .lead {
    max-width: 720px;
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.8;
}

.case-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.case-card {
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    transition: all 0.5s var(--ease);
}

.case-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.case-image {
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--bg-tertiary);
    position: relative;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s var(--ease-out);
    filter: grayscale(0.15) brightness(0.9);
}

.case-card:hover .case-image img {
    transform: scale(1.05);
    filter: grayscale(0) brightness(1);
}

.case-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(10, 10, 10, 0.4) 100%);
    pointer-events: none;
}

.case-info {
    padding: 32px;
}

.case-info .meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--text-tertiary);
}

.case-info .meta .year {
    color: var(--accent);
    font-family: var(--mono);
}

.case-info h3 {
    font-family: var(--serif);
    font-size: 28px;
    margin-bottom: 12px;
    line-height: 1.3;
    font-weight: 500;
}

.case-info .brand {
    font-family: var(--serif);
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.case-info p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
}

.case-info .tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}

.case-info .tag {
    font-size: 11px;
    color: var(--text-tertiary);
    letter-spacing: 1px;
    padding: 4px 10px;
    border: 1px solid var(--border-light);
}

@media (max-width: 1024px) {
    .case-grid { grid-template-columns: 1fr; }
    .page-hero { padding: 140px 32px 60px; }
}

/* ============================================
   详情页（单项目大图）
   ============================================ */
.detail-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.detail-image {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: all 0.5s var(--ease);
}

.detail-image:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

.detail-image img {
    width: 100%;
    height: auto;
    display: block;
}

.detail-image .img-num {
    position: absolute;
    top: 24px;
    right: 24px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text-primary);
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 6px 14px;
    border: 1px solid var(--accent);
    letter-spacing: 2px;
}

@media (max-width: 768px) {
    .page-hero { padding: 120px 20px 48px; }
}