/* ========================================
   浔舒 Perennial - Shantell Martin Style
   极简黑白 · 文字即图形 · 手绘美学
   ======================================== */

/* CSS Variables */
:root {
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;

    /* Typography */
    --font-primary: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Space Mono', monospace;

    /* Border Radius - 和Logo圆润风格统一 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
    --space-2xl: 12rem;

    /* Layout */
    --container-max: 1400px;
    --container-padding: 2rem;
    --nav-height: 70px;

    /* Transitions - 更柔和的缓动 */
    --transition-fast: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 1s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    color: var(--color-black);
    background-color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

::selection {
    background-color: var(--color-black);
    color: var(--color-white);
}

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

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

ul { list-style: none; }

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.text-large {
    font-size: clamp(0.85rem, 1.3vw, 1rem);
    line-height: 1.65;
    font-weight: 400;
}

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    background-color: transparent;
    transition: background-color var(--transition-base);
}

.nav.scrolled {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
}

.nav-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo img {
    height: 35px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 2px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-black);
    transition: width var(--transition-base);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.nav-toggle span {
    width: 24px;
    height: 1.5px;
    background-color: var(--color-black);
    transition: var(--transition-base);
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-white);
    z-index: 999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-list {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.mobile-nav-list li {
    margin-bottom: 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.mobile-nav-list li:last-child {
    border-bottom: none;
}

.mobile-nav-list a {
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    display: block;
    padding: 1.1rem 3rem;
    transition: all 0.3s ease;
    color: var(--color-black);
    position: relative;
}

.mobile-nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1px;
    background-color: var(--color-black);
    transition: width 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mobile-nav-list a:hover {
    color: var(--color-gray-600);
}

.mobile-nav-list a:hover::after {
    width: 2rem;
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-toggle { display: flex; }
}

/* ========================================
   HERO SECTION - Benjamin Hardman Style
   简约 · 干净 · 有呼吸感
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding: calc(var(--nav-height) + 2rem) var(--container-padding) 4rem;
    background-color: var(--color-gray-100);
}

/* Hero Layout: 左图右卡 */
.hero-layout {
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 0;
    align-items: center;
    position: relative;
}

/* 左侧视觉区域 */
.hero-visual {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background-color: var(--color-gray-200);
    border-radius: var(--radius-xl);
}

.hero-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f0f0f0 0%, #e8e8e8 100%);
}

.hero-logo-large {
    width: 50%;
    opacity: 0.6;
    object-fit: contain;
}

/* 右侧白色卡片 */
.hero-card {
    background-color: var(--color-white);
    padding: clamp(2.5rem, 5vw, 4.5rem);
    margin-left: -3rem;
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
    position: relative;
    z-index: 2;
    animation: cardSlideIn 1.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    opacity: 0;
    transform: translateX(30px) scale(0.96);
}

@keyframes cardSlideIn {
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

.hero-card-title {
    font-size: clamp(1rem, 1.8vw, 1.35rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.3;
    margin-bottom: 1.15rem;
    color: var(--color-black);
}

.hero-card-desc {
    font-size: clamp(0.75rem, 0.85vw, 0.82rem);
    line-height: 1.85;
    color: var(--color-gray-600);
    margin-bottom: 1.75rem;
    font-weight: 300;
}

/* CTA 按钮 */
.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.4rem;
    background-color: var(--color-black);
    color: var(--color-white);
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    border-radius: var(--radius-full);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.hero-cta:hover {
    background-color: var(--color-gray-800);
    transform: translateX(4px) scale(1.02);
}

.hero-cta .cta-arrow {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.hero-cta:hover .cta-arrow {
    transform: translateX(4px);
}

/* Scroll Indicator - 位于卡片底部 */
.scroll-indicator {
    position: absolute;
    bottom: -4.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.scroll-indicator span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--color-gray-400);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background-color: var(--color-gray-300);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-black);
    animation: scrollLine 2s ease infinite;
}

@keyframes scrollLine {
    0% { top: -100%; }
    100% { top: 100%; }
}

/* ========================================
   SECTION COMMON
   ======================================== */
section {
    padding: 5rem 0;
}

.section-label {
    margin-bottom: 2.5rem;
}

.section-label span {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    color: var(--color-gray-400);
    display: block;
    margin-bottom: 0.75rem;
}

.section-label h2 {
    font-size: clamp(1.3rem, 3vw, 1.7rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
    background-color: var(--color-gray-100);
    padding: 7rem 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-xl);
    margin-bottom: 5.5rem;
    align-items: start;
}

.about-intro {
    font-size: clamp(0.95rem, 1.5vw, 1.15rem);
    font-weight: 300;
    line-height: 1.5;
    margin-bottom: 1.75rem;
    letter-spacing: -0.01em;
}

.about-desc {
    font-size: 0.875rem;
    line-height: 1.9;
    color: var(--color-gray-600);
    margin-bottom: 1.35rem;
}

.about-image {
    aspect-ratio: 1;
    background-color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.5rem;
    margin-bottom: 0;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
}

.about-image img {
    width: 65%;
    opacity: 0.8;
}

.about-stats {
    display: flex;
    gap: 2.5rem;
}

.stat {
    text-align: left;
}

.stat-num {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.65rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.3rem;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    letter-spacing: 0.03em;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.value-item {
    padding: 2.5rem 2rem;
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.value-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-black);
    border-radius: inherit;
    transform: scale(0.95);
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    z-index: 0;
}

.value-item:hover::before {
    transform: scale(1);
    opacity: 1;
}

.value-item:hover {
    color: var(--color-white);
    border-color: transparent;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.value-item > * {
    position: relative;
    z-index: 1;
    transition: color 0.5s ease 0.15s;
}

.value-item:hover .value-num,
.value-item:hover p {
    color: rgba(255, 255, 255, 0.8);
}

.value-num {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-gray-400);
    display: block;
    margin-bottom: 0.85rem;
}

.value-item h3 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.value-item p {
    font-size: 0.8rem;
    color: var(--color-gray-600);
    line-height: 1.7;
}

.services {
    background-color: var(--color-white);
    padding: var(--space-lg) 0;
}

/* ========================================
   SERVICES SECTION - 四类服务对象
   ======================================== */

/* 服务介绍文字 */
.services-intro {
    text-align: center;
    margin-bottom: 4rem;
    color: var(--color-gray-600);
}

/* 四类对象网格 */
.services-audience-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 5rem;
}

/* 单个对象卡片 - 可点击链接 */
.audience-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2.25rem;
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
    display: block;
    color: inherit;
    text-decoration: none;
}

.audience-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--color-black);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 点击箭头指示 */
.audience-card::after {
    content: '→';
    position: absolute;
    bottom: 2rem;
    right: 2.25rem;
    font-family: var(--font-mono);
    font-size: 1.1rem;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.audience-card:hover {
    background-color: var(--color-gray-100);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    transform: translateY(-6px);
    border-color: transparent;
}

.audience-card:hover::before {
    transform: scaleX(1);
}

.audience-card:hover::after {
    opacity: 0.6;
    transform: translateX(0);
}

/* 卡片头部：编号 + 标题 */
.audience-header {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.audience-num {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-black);
    opacity: 0.4;
    flex-shrink: 0;
}

.audience-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

/* 对象描述（副标题） */
.audience-desc {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-gray-400);
    letter-spacing: 0.04em;
    margin-bottom: 1rem;
}

/* 详细说明文字 */
.audience-detail {
    font-size: 0.8rem;
    line-height: 1.8;
    color: var(--color-gray-600);
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-gray-200);
}

/* 服务列表 */
.service-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.5rem;
}

.service-list li {
    font-size: 0.78rem;
    line-height: 1.6;
    color: var(--color-gray-700);
    padding-left: 1.25rem;
    position: relative;
}

.service-list li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-gray-400);
    font-family: var(--font-mono);
    font-size: 0.7rem;
}

/* ========================================
   ENGAGEMENT SECTION - 合作方式
   ======================================== */

.engagement-section {
    margin-top: 5rem;
    padding-top: 4rem;
    border-top: 1px solid var(--color-gray-200);
}

.engagement-title {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    text-align: center;
    margin-bottom: 0.75rem;
}

.engagement-desc {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: 3rem;
}

/* 三种合作方式网格 */
.engagement-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* 单个合作方式卡片 */
.engagement-item {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: 2.25rem 2rem;
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.engagement-item:hover {
    background-color: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.engagement-item:hover .engagement-type,
.engagement-item:hover .engagement-type-en,
.engagement-item:hover p,
.engagement-item:hover .engagement-scene {
    color: rgba(255, 255, 255, 0.85);
}

.engagement-item:hover .engagement-type {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--color-white);
}

/* 类型标签 A/B/C */
.engagement-type {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 700;
    background-color: var(--color-gray-100);
    color: var(--color-black);
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    transition: all 0.5s ease;
}

.engagement-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
    letter-spacing: -0.01em;
}

.engagement-type-en {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-gray-400);
    letter-spacing: 0.06em;
    margin-bottom: 1.15rem;
    display: block;
}

.engagement-item > p:not(.engagement-type-en):not(.engagement-scene) {
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--color-gray-600);
    margin-bottom: 1.15rem;
}

.engagement-scene {
    font-size: 0.78rem !important;
    line-height: 1.65 !important;
    color: var(--color-gray-500) !important;
    padding-top: 1rem;
    border-top: 1px solid var(--color-gray-200);
    margin-bottom: 0 !important;
}

.engagement-item:hover .engagement-scene {
    border-top-color: rgba(255, 255, 255, 0.2);
}

.services-cta {
    text-align: center;
    padding: var(--space-lg) 0;
}

.services-cta p {
    font-size: 1rem;
    color: var(--color-gray-600);
    margin-bottom: 1.35rem;
}

.btn-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 0;
    border-bottom: 2px solid var(--color-black);
    transition: var(--transition-fast);
}

.btn-link:hover {
    letter-spacing: 0.15em;
    padding-right: 1rem;
}

/* ========================================
   WORK SECTION - 圆角卡片
   ======================================== */
.work {
    background-color: var(--color-white);
    padding: var(--space-md) 0;
}

.work-filter {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.3rem;
    background-color: transparent;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--color-gray-700);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
    transform: scale(1.03);
}

.work-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    background-color: transparent;
}

.work-item {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.work-item:hover {
    background-color: var(--color-white);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
    transform: translateY(-8px) scale(1.02);
}

.work-link {
    display: block;
}

.work-image {
    aspect-ratio: 4/3;
    overflow: hidden;
    position: relative;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.work-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 400;
    text-align: center;
    line-height: 1.5;
    padding: 1.5rem;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.work-item:hover .work-placeholder {
    transform: scale(1.08);
}

/* 真实案例图片 */
.work-real-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.work-info {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.work-info h3 {
    font-size: 0.85rem;
    font-weight: 600;
}

.work-cat {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--color-gray-500);
    letter-spacing: 0.03em;
}

.work-year {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-gray-400);
    align-self: flex-start;
    padding: 0.2rem 0.6rem;
    border: 1px solid var(--color-gray-200);
    margin-top: 0.5rem;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact {
    background-color: var(--color-gray-100);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

/* Contact Info Only - 无表单版本 */
.contact-info-only {
    max-width: 560px;
    margin: 0 auto;
    text-align: left;
}

.contact-info-only .contact-intro {
    margin-bottom: 3rem;
}

.contact-info-only .contact-details {
    margin-bottom: 2.5rem;
}

.contact-info-only .social-links {
    justify-content: flex-start;
}

.contact-intro {
    margin-bottom: 3rem;
}

.contact-details {
    margin-bottom: 3rem;
}

.detail-row {
    display: flex;
    gap: 2rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--color-gray-300);
}

.detail-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--color-gray-400);
    min-width: 60px;
}

.detail-value {
    font-size: 0.92rem;
    font-weight: 500;
}

a.detail-value:hover {
    text-decoration: underline;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.social-links a {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.05em;
    padding: 0.5rem 1.15rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-full);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.social-links a:hover {
    background-color: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
    transform: scale(1.05);
}

/* Contact Form */
.contact-form-wrapper {
    background-color: var(--color-white);
    padding: 3rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
    color: var(--color-gray-600);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.85rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    background-color: transparent;
    outline: none;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-black);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23737373' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 3rem;
}

.btn-submit {
    width: 100%;
    padding: 1rem;
    background-color: var(--color-black);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn-submit:hover {
    background-color: var(--color-gray-800);
    transform: translateY(-2px);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    padding: var(--space-lg) 0 var(--space-md);
    border-top: 1px solid var(--color-gray-200);
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.footer-nav a {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
}

.footer-nav a:hover {
    color: var(--color-black);
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-gray-400);
    letter-spacing: 0.03em;
    margin-bottom: 0.25rem;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --container-padding: 1.5rem;
    }

    section {
        padding: var(--space-xl) 0;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .about-values {
        grid-template-columns: 1fr;
    }

    /* 新服务板块响应式 */
    .services-audience-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .engagement-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .work-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --container-padding: 1.25rem;
        --nav-height: 60px;
    }

    section {
        padding: var(--space-lg) 0;
    }

    /* Hero Mobile */
    .hero {
        padding: calc(var(--nav-height) + 2rem) var(--container-padding) 4rem;
    }

    .hero-layout {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .hero-visual {
        aspect-ratio: 16/9;
        margin-bottom: -2rem;
    }

    .hero-card {
        margin-left: 0;
        padding: 1.75rem 1.5rem;
        animation: cardSlideInMobile 1s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
        opacity: 0;
        transform: translateY(20px);
    }

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

    .about-stats {
        flex-wrap: wrap;
        gap: 2rem;
    }

    .footer-nav {
        flex-wrap: wrap;
        gap: 1.5rem;
    }

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

    .contact-form-wrapper {
        padding: 2rem;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .section-label h2 {
        font-size: 1.15rem;
    }

    .hero-card-title {
        font-size: 1rem;
    }

    /* 新服务板块移动端 */
    .audience-card {
        padding: 1.75rem 1.35rem;
    }

    .audience-header h3 {
        font-size: 1rem;
    }

    .service-list li {
        font-size: 0.74rem;
    }

    .engagement-item {
        padding: 1.5rem 1.25rem;
    }

    .value-item {
        padding: 1.5rem;
    }

    /* 手机端菜单更紧凑 */
    .mobile-nav-list a {
        font-size: 1.25rem;
        padding: 0.95rem 2rem;
    }
}

/* Smooth Scroll Offset */
html {
    scroll-padding-top: calc(var(--nav-height) + 2rem);
}

/* ========================================
   PROJECT DETAIL PAGE
   ======================================== */

.project-page {
    background-color: var(--color-white);
}

/* Project Hero */
.project-hero {
    padding: 10rem 0 4rem;
    position: relative;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    margin-bottom: 3rem;
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.back-link:hover {
    color: var(--color-black);
    transform: translateX(-5px);
}

.back-arrow {
    font-size: 1.1rem;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.back-link:hover .back-arrow {
    transform: translateX(-3px);
}

.project-header {
    max-width: 800px;
}

.project-meta-top {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.75rem;
}

.project-category {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    color: var(--color-gray-500);
    padding: 0.4rem 1rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-full);
}

.project-year {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    color: var(--color-gray-400);
}

.project-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 1.75rem;
}

.project-subtitle {
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    line-height: 1.85;
    color: var(--color-gray-600);
    font-weight: 300;
}

/* Main Image */
.project-main-image {
    padding: 3rem 0;
}

.container-full {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.project-image-large {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-radius: var(--radius-xl);
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-gray-400);
    line-height: 1.6;
}

/* Project Overview */
.project-overview {
    padding: 6rem 0;
    background-color: var(--color-gray-100);
}

.overview-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 5rem;
}

.overview-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1.75rem;
    letter-spacing: -0.01em;
}

.overview-text {
    font-size: 0.95rem;
    line-height: 1.9;
    color: var(--color-gray-700);
    margin-bottom: 1.25rem;
}

.info-card {
    background-color: var(--color-white);
    padding: 2.25rem;
    border-radius: var(--radius-lg);
}

.info-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.info-list {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.75rem 1.5rem;
}

.info-list dt {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    color: var(--color-gray-500);
}

.info-list dd {
    font-size: 0.9rem;
    color: var(--color-gray-800);
}

/* Gallery */
.project-gallery {
    padding: 6rem 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.gallery-item {
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: var(--radius-lg);
    transition: all 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.gallery-item-wide {
    grid-column: span 2;
    aspect-ratio: 21/9;
}

/* Concept Section */
.project-concept {
    padding: 6rem 0;
    background-color: var(--color-gray-100);
}

.section-label-inline {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 2rem;
}

.section-label-inline span {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-gray-400);
}

.concept-content {
    max-width: 750px;
}

.concept-text p {
    font-size: 1.05rem;
    line-height: 1.95;
    color: var(--color-gray-700);
    margin-bottom: 1.25rem;
}

/* Team Section */
.project-team {
    padding: 6rem 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 2.5rem;
}

.team-member {
    text-align: center;
    padding: 2rem 1.25rem;
    border-radius: var(--radius-lg);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.team-member:hover {
    background-color: var(--color-gray-100);
    transform: translateY(-3px);
}

.member-avatar {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.25rem;
    border-radius: 50%;
    overflow: hidden;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e0e0e0 0%, #d0d0d0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-gray-500);
}

.team-member h4 {
    font-size: 0.92rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.team-member p {
    font-size: 0.8rem;
    color: var(--color-gray-500);
}

/* Testimonial */
.project-testimonial {
    padding: 6rem 0;
    background-color: var(--color-black);
    color: var(--color-white);
}

.testimonial {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.testimonial-text {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    line-height: 1.9;
    font-style: italic;
    margin-bottom: 1.75rem;
    opacity: 0.9;
}

.testimonial-author {
    font-style: normal;
}

.testimonial-author cite {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.6);
}

/* Next Project Navigation */
.project-next {
    padding: 5rem 0;
    border-top: 1px solid var(--color-gray-200);
}

.next-project-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2.5rem 0;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.next-project-link:hover {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.next-label {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    color: var(--color-gray-400);
    display: block;
    margin-bottom: 0.5rem;
}

.next-title {
    font-size: 1.65rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.next-arrow {
    font-size: 1.75rem;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.next-project-link:hover .next-arrow {
    transform: translateX(8px);
}

/* Footer in Project Page */
.footer-project {
    padding: 3rem 0;
    border-top: 1px solid var(--color-gray-200);
}

/* Responsive - Project Detail */
@media (max-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .gallery-item-wide {
        grid-column: span 2;
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .project-hero {
        padding: 7rem 0 3rem;
    }

    .overview-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

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

    .gallery-item-wide {
        grid-column: span 1;
    }

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

/* ========================================
   SERVICE DETAIL PAGES
   ======================================== */

/* 服务详情网格 */
.services-detail-grid {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

/* 服务分类块 */
.service-category-block {
    border-bottom: 1px solid var(--color-gray-200);
    padding-bottom: 3.5rem;
}

.service-category-block:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

/* 分类标题 */
.service-category-title {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.service-cat-num {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-white);
    background-color: var(--color-black);
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

/* 服务项网格 */
.service-items-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

/* 单个服务项 */
.service-item-detail {
    padding: 1.75rem;
    background-color: var(--color-gray-100);
    border-radius: var(--radius-md);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.service-item-detail:hover {
    background-color: var(--color-white);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
    transform: translateY(-3px);
}

.service-item-detail h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    letter-spacing: -0.01em;
}

.service-item-detail p {
    font-size: 0.82rem;
    line-height: 1.75;
    color: var(--color-gray-600);
}

/* 服务详情响应式 */
@media (max-width: 768px) {
    .service-items-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .service-category-block {
        padding-bottom: 2.5rem;
    }
}