/*
Theme Name: Folding Ruler Studio
Author: Folding Ruler Studio
Description: 高级展览设计工作室主题 - V16.0 系统性改造：子页面、AJAX表单、排版优化
Version: 16.6
*/

/* ========================================
   V7 ENHANCED CSS VARIABLES
   ======================================== */
:root {
    /* Colors */
    --color-black: #0a0a0a;
    --color-dark-gray: #1a1a1a;
    --color-gray: #666666;
    --color-light-gray: #f5f5f5;
    --color-white: #ffffff;
    --color-gold: #c9a227;
    --color-gold-light: #d4af37;
    --color-gold-dark: #a07f1a;
    --color-accent: #e6b800;

    /* Typography */
    --font-primary: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-secondary: 'Georgia', serif;
    --font-mono: 'Courier New', monospace;

    /* Font Sizes */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 5rem;
    --spacing-4xl: 6rem;
    --spacing-5xl: 8rem;
    --spacing-6xl: 12rem;

    /* Layout */
    --max-width: 1400px;
    --max-width-sm: 640px;
    --max-width-md: 768px;
    --max-width-lg: 1024px;
    --max-width-xl: 1280px;
    --container-padding: 2rem;
    --container-padding-mobile: 1.5rem;

    /* Transitions */
    --transition-instant: 0.15s ease;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-slower: 0.8s ease;
    --ease-out: cubic-bezier(0.215, 0.61, 0.355, 1);
    --ease-in-out: cubic-bezier(0.645, 0.045, 0.355, 1);

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);

    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;

    /* Z-index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;

    /* Mobile Touch Target */
    --touch-target: 44px;
    --touch-target-lg: 48px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-dark-gray);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Prevent text selection on touch devices */
* {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-touch-callout: none;
}

/* Prevent double-tap zoom */
button, a {
    touch-action: manipulation;
}

/* ========================================
   LOADER
   ======================================== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-black);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
}

.loader.loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-text {
    font-family: var(--font-primary);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.5em;
    color: var(--color-white);
    margin-bottom: 2rem;
}

.loader-bar {
    width: 200px;
    height: 2px;
    background-color: var(--color-light-gray);
    position: relative;
    overflow: hidden;
}

.loader-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-gold);
    animation: loading 1.5s ease-out forwards;
}

@keyframes loading {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(0); }
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal), background-color var(--transition-normal), box-shadow var(--transition-normal), padding var(--transition-normal);
    will-change: transform;
}

/* V16.2: 导航栏底部金色细线 */
.navbar::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--color-gold);
    opacity: 0;
    transition: opacity var(--transition-normal), width var(--transition-normal);
}

.navbar:hover::after,
.navbar.scrolled::after {
    opacity: 1;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
    padding: 0.875rem 0;
}

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

/* V16.2: Logo增强 - 分隔符+斜体 */
.nav-logo {
    font-family: var(--font-primary);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-white);
    text-decoration: none;
    letter-spacing: 0.15em;
    display: flex;
    align-items: center;
    gap: 0;
    transition: color var(--transition-fast);
}

.logo-text {
    display: inline-flex;
    align-items: center;
}

.logo-text::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--color-gold);
    margin-right: 0.75rem;
    flex-shrink: 0;
    transition: transform var(--transition-normal);
}

.nav-logo:hover .logo-text::before {
    transform: rotate(45deg) scale(1.2);
}

.navbar.scrolled .nav-logo {
    color: var(--color-black);
}

.logo-accent {
    color: var(--color-gold);
}

/* V16.2: 菜单布局增强 */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    align-items: center;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 50px;
    padding: 0.25rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
}

.navbar.scrolled .nav-menu {
    background: var(--color-light-gray);
    border-color: transparent;
}

.nav-link {
    font-family: var(--font-primary);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-white);
    text-decoration: none;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    position: relative;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    transition: all var(--transition-normal);
}

.navbar.scrolled .nav-link {
    color: var(--color-dark-gray);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--color-gold);
    transition: width var(--transition-normal);
    border-radius: 1px;
}

.nav-link:hover {
    color: var(--color-gold);
    background: rgba(201, 162, 39, 0.08);
}

.navbar.scrolled .nav-link:hover {
    background: rgba(201, 162, 39, 0.06);
}

.nav-link:hover::after {
    width: 16px;
}

.nav-toggle {
    display: none;
    width: var(--touch-target-lg);
    height: var(--touch-target-lg);
    padding: 12px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle:active {
    transform: scale(0.95);
    background-color: rgba(201, 162, 39, 0.2);
}

.nav-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background-color: var(--color-white);
    transition: all var(--transition-normal) var(--ease-out);
    border-radius: 1px;
    margin: 5px 0;
}

.navbar.scrolled .nav-toggle span {
    background-color: var(--color-black);
}

.nav-toggle.active span {
    background-color: var(--color-gold);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-black) 0%, #1a1a1a 50%, #2a2a2a 100%);
    color: var(--color-white);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect x="0" y="0" width="1" height="1" fill="%23ffffff" opacity="0.03"/></svg>');
    background-size: 50px 50px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
}

.hero-content {
    position: relative;
    text-align: center;
    padding: 2rem;
    max-width: 900px;
    animation: fadeInUp 1s ease;
}

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

.hero-subtitle {
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.4em;
    color: var(--color-gold);
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-family: var(--font-primary);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 2rem;
}

.title-line {
    display: block;
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.3s;
}

.hero-description {
    font-size: 1.2rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease 0.6s forwards;
    opacity: 0;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.9s forwards;
    opacity: 0;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: var(--touch-target-lg);
    padding: 1rem 2rem;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: 0;
    touch-action: manipulation;
}

.btn-primary {
    background-color: var(--color-gold);
    color: var(--color-white);
    border-color: var(--color-gold);
}

.btn-primary:hover {
    background-color: var(--color-gold-light);
    border-color: var(--color-gold-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-outline:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ========================================
   SCROLL INDICATOR
   ======================================== */
.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.scroll-indicator i {
    font-size: 1rem;
}

/* ========================================
   STATS SECTION
   ======================================== */
.stats-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-light-gray);
}

.stats-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
}

.stat-number {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
    margin-bottom: 0.5rem;
    display: inline;
}

.stat-suffix {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
    display: inline;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-gray);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.stat-divider {
    width: 1px;
    background-color: var(--color-light-gray);
    align-self: center;
    height: 60px;
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-subtitle {
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.4em;
    color: var(--color-gold);
    text-transform: uppercase;
    display: block;
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-primary);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 1.5rem;
}

.section-description {
    font-size: 1.1rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.section-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ========================================
   WORK SECTION
   ======================================== */
.work-section {
    background-color: var(--color-light-gray);
}

.work-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

/* Work Filter Section - V11.2 优化布局 */
.work-filter-section {
    background: var(--color-white);
    padding: 0;
    border-bottom: 1px solid var(--color-light-gray);
}

/* V16.2: 作品页全量卡片式布局 */
.work-full-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-light-gray);
}

.work-grid-full {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.work-grid-full .work-item {
    background: var(--color-white);
    border-radius: 0;
    overflow: hidden;
    border: 1px solid var(--color-light-gray);
    transition: all var(--transition-normal);
    grid-column: auto; /* V16.3: 覆盖通用work-item的span 4 */
}

.work-grid-full .work-item:hover {
    border-color: var(--color-gold);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.work-grid-full .work-image-wrapper {
    height: 280px;
}

.work-grid-full .work-overlay {
    opacity: 1;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, transparent 60%);
}

.work-grid-full .work-content {
    transform: translateY(0);
}

.work-grid-full .work-cta {
    display: none;
}

.work-grid-full .work-client {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.25rem;
}

.work-grid-full .work-award {
    font-size: 0.8rem;
    color: var(--color-gold);
    margin-bottom: 0;
}

.work-filter-container {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 1.5rem 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem var(--container-padding);
    align-items: center;
}

.work-filters {
    grid-column: 1 / -1;
    margin-bottom: var(--spacing-xl);
}

/* Work Search - V11.2 优化搜索栏 */
.work-search {
    display: flex;
    align-items: center;
    background: var(--color-white);
    border: 2px solid var(--color-light-gray);
    border-radius: 50px;
    overflow: hidden;
    transition: all var(--transition-fast);
    width: 100%;
    max-width: 400px;
}

.work-search:focus-within {
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.work-search-input {
    flex: 1;
    padding: 0.875rem 1.5rem;
    border: none;
    background: transparent;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    color: var(--color-black);
    outline: none;
    min-width: 0;
}

.work-search-input::placeholder {
    color: var(--color-medium-gray);
}

.work-search-btn {
    padding: 0.875rem 1.5rem;
    background: var(--color-gold);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.work-search-btn:hover {
    background: var(--color-dark-gold);
}

.work-count {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--color-medium-gray);
    white-space: nowrap;
}

.count-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gold);
}

.filter-btn {
    padding: 0.75rem 2rem;
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    background-color: var(--color-white);
    color: var(--color-dark-gray);
    border: 1px solid var(--color-light-gray);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-gold);
    color: var(--color-white);
    border-color: var(--color-gold);
}

.work-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.work-item {
    grid-column: span 4;
    position: relative;
    overflow: hidden;
    background-color: var(--color-white);
    transition: all var(--transition-normal);
}

.work-item-large {
    grid-column: span 8;
}

.work-item-medium {
    grid-column: span 4;
}

.work-link {
    display: block;
    text-decoration: none;
}

.work-image-wrapper {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
}

.work-item-large .work-image-wrapper {
    height: 500px;
}

.work-item-medium .work-image-wrapper {
    height: 400px;
}

.work-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.work-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.6) 50%, rgba(0, 0, 0, 0.3) 100%);
    display: flex;
    align-items: flex-end;
    padding: 2rem;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.work-item:hover .work-image {
    transform: scale(1.1);
}

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

/* V8: 多层次悬停效果 */
.work-item:hover .work-category {
    transform: translateY(-3px);
    transition: transform var(--transition-normal);
}

.work-item:hover .work-title {
    transform: translateY(-5px);
    transition: transform var(--transition-normal);
}

.work-item:hover .work-description {
    opacity: 1;
}

.work-content {
    color: var(--color-white);
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.work-item:hover .work-content {
    transform: translateY(0);
}

.work-category {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 0.75rem;
    display: block;
    transition: transform var(--transition-normal);
}

.work-title {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    transition: transform var(--transition-normal);
}

.work-en-title {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.work-description {
    font-size: 0.9rem;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 1rem;
}

.work-cta {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-gold);
}

/* ========================================
   SERVICES SECTION
   ======================================== */
.services-section {
    background-color: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.service-card {
    background-color: var(--color-white);
    padding: 2rem;
    border: 1px solid var(--color-light-gray);
    transition: all var(--transition-normal);
}

.service-card:hover {
    border-color: var(--color-gold);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.service-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-light-gray);
    border-radius: 50%;
    margin-bottom: 2rem;
    font-size: 1.8rem;
    color: var(--color-gold);
    transition: all var(--transition-fast);
}

.service-card:hover .service-icon {
    background-color: var(--color-gold);
    color: var(--color-white);
}

.service-title {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-black);
}

.service-description {
    font-size: 1rem;
    color: var(--color-gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.service-features {
    list-style: none;
    margin-top: 1.5rem;
}

.service-features li {
    padding: 0.5rem 0;
    color: var(--color-gray);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.service-features li i {
    color: var(--color-gold);
    font-size: 0.85rem;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about-section {
    background-color: var(--color-light-gray);
}

.about-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content {
    padding-right: 2rem;
}

.about-story {
    margin: 2rem 0;
    line-height: 1.9;
    color: var(--color-gray);
}

.about-story p {
    margin-bottom: 1.5rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    text-align: center;
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-gold);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 1.5rem;
}

.feature-item h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-black);
}

.feature-item p {
    font-size: 0.85rem;
    color: var(--color-gray);
}

.about-image-wrapper {
    position: relative;
}

.about-image-wrapper .bg-image {
    width: 100%;
    height: 0;
    padding-bottom: 125%;
    box-shadow: var(--shadow-xl);
}

.about-image-accent {
    position: absolute;
    top: -30px;
    right: -30px;
    width: 150px;
    height: 150px;
    background-color: var(--color-gold);
    z-index: -1;
}

/* ========================================
   TEAM SECTION
   ======================================== */
.team-section {
    background-color: var(--color-white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.team-member {
    background-color: var(--color-white);
    transition: all var(--transition-normal);
}

.team-member:hover {
    transform: translateY(-5px);
}

.team-image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 100%;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.team-image-wrapper .bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: grayscale(100%);
    transition: filter var(--transition-normal);
}

.team-member:hover .team-image-wrapper .bg-image {
    filter: grayscale(0%);
}

.team-social {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 1rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0) 100%);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.team-member:hover .team-social {
    transform: translateY(0);
}

.team-brand {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-gold);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.team-info {
    text-align: center;
}

.team-name {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 0.5rem;
}

.team-role {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-gold);
    display: block;
    margin-bottom: 1rem;
}

.team-bio {
    font-size: 0.9rem;
    color: var(--color-gray);
    line-height: 1.7;
}

/* ========================================
   CLIENTS SECTION
   ======================================== */
.clients-section {
    background-color: var(--color-light-gray);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.client-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-color: var(--color-white);
    transition: all var(--transition-fast);
    filter: grayscale(100%);
    opacity: 0.6;
}

.client-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
    box-shadow: var(--shadow-md);
}

.client-logo img {
    max-width: 150px;
    max-height: 80px;
    object-fit: contain;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact-section {
    background-color: var(--color-black);
    color: var(--color-white);
}

.contact-section .section-subtitle {
    color: var(--color-gold);
}

.contact-section .section-title {
    color: var(--color-white);
}

.contact-section .section-description {
    color: rgba(255, 255, 255, 0.7);
}

.contact-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    padding-right: 2rem;
}

.contact-info h3 {
    font-family: var(--font-primary);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-white);
}

.contact-info > p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 3rem;
    line-height: 1.8;
}

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

.contact-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-gold);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contact-label {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 0.25rem;
}

.contact-value {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.6;
}

.contact-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 1.2rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background-color: var(--color-gold);
    transform: translateY(-3px);
}

/* ========================================
   CONTACT FORM
   ======================================== */
.contact-form-wrapper {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem 1.5rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-gold);
    background-color: rgba(255, 255, 255, 0.08);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12"><path fill="%23ffffff" d="M6 8L1 3h10z"/></svg>');
    background-repeat: no-repeat;
    background-position: right 1.5rem center;
    padding-right: 3rem;
}

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

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-family: var(--font-primary);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

.footer-tagline {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--color-gold);
    text-transform: uppercase;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-white);
}

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

.footer-column ul li {
    margin-bottom: 0.75rem;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-column ul li a:hover {
    color: var(--color-gold);
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--color-gold);
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--color-gold);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible,
.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--color-gold-light);
    transform: translateY(-5px);
}

/* ========================================
   V8 ANIMATION CLASSES
   ======================================== */
.animate {
    opacity: 1;
    transform: translateY(0) !important;
    will-change: opacity, transform;
}

/* V8: 骨架屏动画 */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-light-gray) 25%,
        var(--color-white) 50%,
        var(--color-light-gray) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.work-item.loading .work-image-wrapper {
    position: relative;
}

.work-item.loading .work-image-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--skeleton);
    z-index: 1;
}

.work-item.loading .work-image {
    opacity: 0;
}

.work-item.loaded .work-image {
    animation: imageFadeIn 0.5s ease;
}

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

/* V7: GPU Acceleration for Smooth Animations */
.work-item,
.service-card,
.team-member,
.nav-menu,
.hero-content {
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    will-change: transform;
}

/* V7: Image Loading Fade Effect */
img.loaded {
    animation: fadeIn 0.5s ease;
}

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

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

    .section-title {
        font-size: 2.5rem;
    }

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

    .stat-divider {
        display: none;
    }

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

    .services-grid {
        display: flex;
        overflow-x: auto;
        gap: 1.5rem;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .services-grid::-webkit-scrollbar {
        display: none;
    }

    .service-card {
        min-width: 280px;
        flex-shrink: 0;
        scroll-snap-align: start;
    }

    .work-item-large,
    .work-item-medium {
        grid-column: span 1;
    }

    .about-container,
    .contact-container {
        grid-template-columns: 1fr;
    }

    .about-image-wrapper,
    .about-content,
    .contact-info {
        padding-right: 0;
    }

    .about-image-accent {
        display: none;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

@media (max-width: 768px) {
    :root {
        --spacing-xxl: 4rem;
        --spacing-xl: 3rem;
        --spacing-lg: 2.5rem;
        --container-padding: var(--container-padding-mobile);
    }

    /* V7: Enhanced Mobile Navigation */
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        background: linear-gradient(135deg, rgba(10, 10, 10, 0.98) 0%, rgba(26, 26, 26, 0.98) 100%);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        transition: left var(--transition-slow) var(--ease-out);
        z-index: var(--z-modal);
        padding: 2rem;
        border-radius: 0;
        border: none;
        gap: 0.5rem;
    }

    .nav-menu.active {
        left: 0;
    }

    /* Staggered Animation for Menu Items */
    .nav-menu .nav-link {
        font-size: 1.8rem;
        opacity: 0;
        transform: translateY(30px);
        transition: all var(--transition-normal) var(--ease-out);
        margin: 1rem 0;
        color: var(--color-white);
    }

    .nav-menu.active .nav-link {
        opacity: 1;
        transform: translateY(0);
    }

    .nav-menu.active .nav-link:nth-child(1) { transition-delay: 0.1s; }
    .nav-menu.active .nav-link:nth-child(2) { transition-delay: 0.15s; }
    .nav-menu.active .nav-link:nth-child(3) { transition-delay: 0.2s; }
    .nav-menu.active .nav-link:nth-child(4) { transition-delay: 0.25s; }
    .nav-menu.active .nav-link:nth-child(5) { transition-delay: 0.3s; }

    /* V7: Enhanced Hamburger Menu */
    .nav-toggle {
        width: var(--touch-target-lg);
        height: var(--touch-target-lg);
        padding: 12px;
        border-radius: var(--radius-md);
        transition: all var(--transition-fast);
    }

    .nav-toggle:active {
        transform: scale(0.95);
        background-color: rgba(201, 162, 39, 0.2);
    }

    .nav-toggle span {
        width: 24px;
        height: 2px;
        background-color: var(--color-white);
        transition: all var(--transition-normal) var(--ease-out);
        border-radius: 1px;
    }

    .nav-toggle.active span {
        background-color: var(--color-gold);
    }

    /* V7: Mobile Backdrop Overlay */
    .mobile-backdrop {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: var(--z-modal-backdrop);
    }

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

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .hero-title {
        font-size: 2.2rem;
        line-height: 1.3;
    }

    .hero-description {
        font-size: 1rem;
        line-height: 1.8;
    }

    .section-title {
        font-size: 2rem;
        line-height: 1.3;
    }

    .stats-container {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        gap: 0.5rem;
        padding: 0.5rem;
    }

    /* 隐藏统计滚动条 */
    .stats-container::-webkit-scrollbar {
        display: none;
    }

    .stats-container {
        -ms-overflow-style: none;
        scrollbar-width: none;
    }

    .stat-item {
        flex: 0 0 auto;
        min-width: 140px;
        padding: 1rem 1.5rem;
        scroll-snap-align: center;
    }

    .work-grid {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        gap: 1rem;
        padding: 0 var(--container-padding-mobile);
        padding-bottom: 2.5rem;
        scroll-behavior: smooth;
    }

    /* 隐藏滚动条但保留功能 */
    .work-grid::-webkit-scrollbar {
        display: none;
    }

    .work-grid {
        -ms-overflow-style: none;
        scrollbar-width: none;
    }

    /* 滑动进度指示器 */
    .work-grid::after {
        content: '';
        position: fixed;
        bottom: 2rem;
        left: 50%;
        transform: translateX(-50%);
        width: 40px;
        height: 4px;
        background-color: var(--color-gold);
        border-radius: 2px;
        z-index: 10;
        animation: slideIndicator 2s ease-in-out infinite;
    }

    @keyframes slideIndicator {
        0%, 100% {
            opacity: 0.4;
            width: 40px;
        }
        50% {
            opacity: 1;
            width: 60px;
        }
    }

    .work-item {
        flex: 0 0 85vw;
        scroll-snap-align: start;
        margin-right: 0;
    }

    .work-item:last-child {
        margin-right: 0;
    }

    .services-grid {
        display: flex;
        overflow-x: auto;
        gap: 1rem;
        padding: 0 var(--container-padding-mobile);
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .services-grid::-webkit-scrollbar {
        display: none;
    }

    .service-card {
        min-width: 260px;
        flex-shrink: 0;
        scroll-snap-align: start;
        padding: 1.5rem;
    }

    .team-grid {
        display: flex;
        overflow-x: auto;
        gap: 1rem;
        padding: 0 var(--container-padding-mobile);
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .team-grid::-webkit-scrollbar {
        display: none;
    }

    .team-member {
        min-width: 200px;
        max-width: 200px;
        flex-shrink: 0;
        scroll-snap-align: start;
    }

    .team-member .team-bio {
        font-size: 0.75rem;
    }

    .team-name {
        font-size: 0.9rem;
    }

    .team-role {
        font-size: 0.7rem;
    }

    .clients-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
        padding: 0 var(--container-padding-mobile);
    }

    .client-logo {
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 0.75rem;
        background-color: var(--color-white);
        border-radius: var(--radius-lg);
    }

    .client-logo img {
        height: 30px;
        width: auto;
        max-width: 100%;
        object-fit: contain;
        filter: grayscale(100%);
        transition: filter var(--transition-normal);
    }

    .client-logo img:hover {
        filter: grayscale(0%);
    }

    .about-features {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    /* V8: 手风琴折叠卡片 */
    .feature-card {
        border: 1px solid var(--color-light-gray);
        border-radius: var(--radius-lg);
        overflow: hidden;
        transition: all var(--transition-fast);
        background-color: var(--color-white);
    }

    .feature-card.active {
        border-color: var(--color-gold);
        box-shadow: var(--shadow-md);
    }

    .feature-header {
        padding: 1rem;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        min-height: var(--touch-target-lg);
        transition: background-color var(--transition-fast);
    }

    .feature-header:hover {
        background-color: var(--color-light-gray);
    }

    .feature-title {
        font-family: var(--font-primary);
        font-size: 1rem;
        font-weight: 600;
        color: var(--color-black);
        margin: 0;
    }

    .feature-card.active .feature-title {
        color: var(--color-gold);
    }

    .feature-icon {
        font-size: 1.5rem;
        color: var(--color-gray);
        transition: transform var(--transition-fast);
    }

    .feature-card.active .feature-icon {
        transform: rotate(180deg);
        color: var(--color-gold);
    }

    .feature-content {
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
        padding: 0 1rem;
    }

    .feature-card.active .feature-content {
        max-height: 500px;
        padding: 0 1rem 1rem 1rem;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .footer-legal {
        flex-direction: column;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .work-image-wrapper {
        height: 300px !important;
    }

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

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .loader,
    .navbar,
    .hero-scroll,
    .back-to-top,
    .work-filters,
    .contact-form-wrapper,
    .footer-bottom {
        display: none;
    }

    body {
        font-size: 12pt;
        color: #000;
    }

    .hero {
        height: auto;
        min-height: auto;
        padding: 2rem 0;
    }

    .work-grid,
    .services-grid,
    .team-grid {
        display: block;
    }

    .work-item,
    .service-card,
    .team-member {
        page-break-inside: avoid;
        margin-bottom: 2rem;
    }
}

/* ========================================
   V7 ACCESSIBILITY
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .work-item,
    .service-card,
    .team-member {
        will-change: auto;
    }
}

a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--color-gold);
    outline-offset: 2px;
}

/* V7: High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-gold: #ffd700;
        --color-gold-light: #ffed4a;
    }

    .nav-link:hover,
    .btn:hover {
        outline: 2px solid var(--color-white);
    }
}
/* ========================================
   V16.3: WORK DETAIL PAGE - 全新UI
   ======================================== */

/* 返回按钮 - 左上角浮动胶囊 */
.detail-back-btn {
    position: fixed;
    top: 80px;
    left: 2rem;
    z-index: 100;
    opacity: 0;
    animation: fadeInUp 0.5s ease 0.3s forwards;
}

.detail-back-btn a {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 1.25rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--color-white);
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    transition: all var(--transition-fast);
}

.detail-back-btn a i {
    font-size: 0.7rem;
    transition: transform var(--transition-fast);
}

.detail-back-btn a:hover {
    background: var(--color-gold);
    border-color: var(--color-gold);
}

.detail-back-btn a:hover i {
    transform: translateX(-3px);
}

/* Hero区 - 全屏背景图 */
.detail-hero {
    position: relative;
    width: 100%;
    height: 85vh;
    min-height: 500px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    overflow: hidden;
}

.detail-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.detail-hero-bg .bg-image {
    width: 100%;
    height: 100%;
    transform: scale(1.05);
    transition: transform 8s ease;
}

.detail-hero-bg.loaded .bg-image {
    transform: scale(1);
}

.detail-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.3) 40%, rgba(0, 0, 0, 0.15) 100%);
}

.detail-hero-content {
    position: relative;
    z-index: 2;
    max-width: 1000px;
    padding: 0 var(--container-padding) 5rem;
    text-align: center;
    color: var(--color-white);
}

.detail-hero-meta {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.detail-hero-tag {
    display: inline-block;
    padding: 0.35rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50px;
    backdrop-filter: blur(10px);
}

.detail-hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.detail-hero-en-title {
    font-size: 1rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
}

.detail-hero-location {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.detail-hero-location i {
    color: var(--color-gold);
    margin-right: 0.35rem;
}

.detail-hero-award {
    font-size: 1rem;
    color: var(--color-gold);
    font-weight: 600;
    margin-top: 0.5rem;
}

.detail-hero-award i {
    margin-right: 0.35rem;
}

/* 滚动提示 */
.detail-hero-scroll {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    animation: detailScrollBounce 2s ease infinite;
}

.detail-hero-scroll i {
    font-size: 0.8rem;
}

@keyframes detailScrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(6px); }
}

/* 项目概述 */
.detail-overview {
    padding: 6rem 0;
    background: var(--color-white);
}

.detail-overview-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 4rem;
    align-items: start;
}

.detail-section-title {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.detail-section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-light-gray);
}

.detail-text-content {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--color-dark-gray);
}

.detail-text-content p {
    margin-bottom: 1.5rem;
}

.detail-text-content p:last-child {
    margin-bottom: 0;
}

.detail-text-content strong {
    color: var(--color-black);
}

/* 信息卡片 */
.detail-info-card {
    background: var(--color-light-gray);
    padding: 2rem;
    border: 1px solid var(--color-light-gray);
    margin-bottom: 1.5rem;
}

.detail-info-card-title {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-black);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e5e5;
}

.detail-info-list {
    display: flex;
    flex-direction: column;
}

.detail-info-row {
    display: flex;
    flex-direction: column;
    padding: 0.85rem 0;
    border-bottom: 1px solid #e5e5e5;
}

.detail-info-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.detail-info-row:first-child {
    padding-top: 0;
}

.detail-info-label {
    font-size: 0.75rem;
    color: var(--color-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.25rem;
}

.detail-info-label i {
    color: var(--color-gold);
    width: 16px;
    margin-right: 0.25rem;
    font-size: 0.7rem;
}

.detail-info-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-black);
}

/* 咨询按钮 */
.detail-consult-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--color-black);
    color: var(--color-white);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: all var(--transition-fast);
}

.detail-consult-btn:hover {
    background: var(--color-gold);
}

.detail-consult-btn i {
    transition: transform var(--transition-fast);
}

.detail-consult-btn:hover i {
    transform: translateX(4px);
}

/* 画廊 */
.detail-gallery {
    padding: 6rem 0;
    background: var(--color-light-gray);
}

.detail-gallery-header {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    margin-bottom: 2rem;
}

.detail-gallery-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.detail-gallery-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

.detail-gallery-item:first-child {
    grid-column: span 2;
    grid-row: span 2;
    aspect-ratio: auto;
}

.detail-gallery-item .bg-image {
    width: 100%;
    height: 100%;
    transition: transform 0.6s ease;
}

.detail-gallery-item:hover .bg-image {
    transform: scale(1.05);
}

/* 上下导航 */
.detail-nav-section {
    padding: 4rem 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-light-gray);
}

.detail-nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.detail-nav-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 2rem;
    text-decoration: none;
    color: var(--color-black);
    border: 1px solid var(--color-light-gray);
    transition: all var(--transition-fast);
}

.detail-nav-card:hover {
    border-color: var(--color-gold);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.detail-nav-prev {
    justify-content: flex-start;
}

.detail-nav-next {
    justify-content: flex-end;
    text-align: right;
}

.detail-nav-arrow {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-light-gray);
    color: var(--color-gold);
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.detail-nav-card:hover .detail-nav-arrow {
    background: var(--color-gold);
    color: var(--color-white);
}

.detail-nav-label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gray);
    margin-bottom: 0.35rem;
}

.detail-nav-name {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-black);
    line-height: 1.3;
}

.detail-nav-placeholder {
    /* 空占位 */
}

/* V16.3: 详情页响应式 */
@media (max-width: 1024px) {
    .detail-overview-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

    .detail-info-card {
        margin-bottom: 0;
    }

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

    .detail-gallery-item:first-child {
        grid-column: span 2;
        grid-row: span 1;
        aspect-ratio: 16/9;
    }
}

@media (max-width: 768px) {
    .detail-back-btn {
        top: 70px;
        left: 1rem;
        opacity: 1;
        animation: none;
    }

    .detail-back-btn a {
        padding: 0.5rem 1rem;
        font-size: 0.7rem;
    }

    .detail-hero {
        height: 65vh;
        min-height: 400px;
    }

    .detail-hero-content {
        padding: 0 var(--container-padding-mobile) 3.5rem;
    }

    .detail-hero-title {
        font-size: 2rem;
    }

    .detail-hero-meta {
        gap: 0.5rem;
    }

    .detail-hero-tag {
        font-size: 0.65rem;
        padding: 0.25rem 0.75rem;
    }

    .detail-hero-scroll {
        display: none;
    }

    .detail-overview {
        padding: 3rem 0;
    }

    .detail-overview-container {
        padding: 0 var(--container-padding-mobile);
        gap: 2rem;
    }

    .detail-overview-sidebar {
        grid-template-columns: 1fr;
    }

    .detail-text-content {
        font-size: 0.95rem;
        line-height: 1.8;
    }

    .detail-gallery {
        padding: 3rem 0;
    }

    .detail-gallery-grid {
        grid-template-columns: 1fr;
        gap: 0.25rem;
        padding: 0 var(--container-padding-mobile);
    }

    .detail-gallery-item:first-child {
        grid-column: span 1;
        aspect-ratio: 16/9;
    }

    .detail-gallery-item {
        aspect-ratio: 4/3;
    }

    .detail-nav-section {
        padding: 2rem 0;
    }

    .detail-nav-container {
        padding: 0 var(--container-padding-mobile);
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .detail-nav-card {
        padding: 1.25rem;
    }

    .detail-nav-next {
        text-align: left;
    }

    .detail-nav-placeholder {
        display: none;
    }
}

/* ========================================
   V16: SUB PAGES STYLES
   ======================================== */

/* Page Hero - 子页面顶部banner */
.page-hero {
    position: relative;
    min-height: 40vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--color-black) 0%, #1a1a2e 50%, #16213e 100%);
    padding: 8rem var(--container-padding) 4rem;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(201, 162, 39, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.page-hero-content {
    position: relative;
    z-index: 1;
}

.page-hero-content .section-subtitle {
    display: block;
    margin-bottom: 1rem;
    color: var(--color-gold);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.2em;
}

.page-hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.page-hero-description {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Story Content - 我们的故事 */
.story-content {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-white);
}

.story-content .container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.story-chapter {
    margin-bottom: var(--spacing-4xl);
    padding-bottom: var(--spacing-4xl);
    border-bottom: 1px solid var(--color-light-gray);
}

.story-chapter:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.chapter-number {
    font-size: 4rem;
    font-weight: 800;
    color: var(--color-gold);
    opacity: 0.2;
    font-family: var(--font-mono);
    margin-bottom: -1.5rem;
    line-height: 1;
}

.chapter-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 2rem;
    line-height: 1.4;
}

.chapter-content p {
    font-size: var(--font-size-lg);
    line-height: 2;
    color: #444;
    margin-bottom: 1.5rem;
}

.chapter-content p:last-child {
    margin-bottom: 0;
}

.chapter-content strong {
    color: var(--color-black);
    font-weight: 600;
}

/* V16.1: 统一导航栏 - sub-page active 样式 */
.navbar.scrolled .nav-link.active {
    color: var(--color-gold);
}

.navbar.scrolled .nav-link.active::after {
    width: 100%;
}

.navbar:not(.scrolled) .nav-link.active {
    color: var(--color-gold);
}

.navbar:not(.scrolled) .nav-link.active::after {
    width: 100%;
}

/* V16.1: 子页面CTA板块 */
.page-cta-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--color-black) 0%, #1a1a1a 100%);
    text-align: center;
}

.page-cta-content {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.page-cta-content .section-subtitle {
    color: var(--color-gold);
    margin-bottom: 1rem;
}

.page-cta-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.page-cta-desc {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

/* V16.1: 服务页面 - 介绍段落 */
.page-intro-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-light-gray);
}

.page-intro-content {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
    text-align: center;
}

.page-intro-content p {
    font-size: var(--font-size-lg);
    line-height: 2;
    color: var(--color-gray);
}

.page-intro-content strong {
    color: var(--color-gold);
    font-weight: 700;
}

/* V16.1: 服务页面 - 协作流程 */
.page-process-section {
    background: var(--color-light-gray);
}

.process-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.process-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 2rem;
    background: var(--color-white);
    border: 1px solid var(--color-light-gray);
    transition: all var(--transition-normal);
}

.process-step:hover {
    border-color: var(--color-gold);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.process-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-gold);
    opacity: 0.3;
    font-family: var(--font-mono);
    margin-bottom: 1rem;
}

.process-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 0.75rem;
}

.process-content p {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    line-height: 1.8;
}

/* V16.1: 联系页面 - 独立样式 */
.contact-page-section {
    background: var(--color-black);
    color: var(--color-white);
}

/* V16.1: 表单反馈消息 */
#form-message {
    transition: opacity 0.3s ease;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* V16.1: 子页面footer间距 */
.page-hero + .section,
.page-hero + .story-content,
.page-hero + .contact-section,
.page-hero + .contact-page-section {
    margin-top: 0;
}

/* V16.1: 子页面响应式 */
@media (max-width: 1024px) {
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    /* V16.2: 导航栏移动端适配 */
    .nav-menu {
        background: transparent;
        border: none;
        border-radius: 0;
        padding: 0;
    }

    .nav-link {
        padding: 0.75rem 1.5rem;
        border-radius: 50px;
    }
}

@media (max-width: 768px) {
    .page-hero {
        min-height: 35vh;
        padding: 7rem var(--container-padding-mobile) 3rem;
    }

    .page-hero-title {
        font-size: var(--font-size-4xl);
    }

    .page-hero-description {
        font-size: var(--font-size-base);
    }

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

    .process-step {
        flex-direction: row;
        text-align: left;
        gap: 1.5rem;
        align-items: flex-start;
    }

    .process-number {
        margin-bottom: 0;
        flex-shrink: 0;
        width: 60px;
    }

    .page-cta-title {
        font-size: var(--font-size-3xl);
    }

    .page-intro-content p {
        font-size: var(--font-size-base);
    }

    .story-content {
        padding: var(--spacing-2xl) 0;
    }

    .story-chapter {
        margin-bottom: var(--spacing-2xl);
        padding-bottom: var(--spacing-2xl);
    }

    .chapter-number {
        font-size: 3rem;
    }

    .chapter-title {
        font-size: var(--font-size-2xl);
    }

    .chapter-content p {
        font-size: var(--font-size-base);
    }

    /* V16.2: 作品页移动端卡片布局 */
    .work-grid-full {
        grid-template-columns: 1fr;
        padding: 0 var(--container-padding-mobile);
    }

    .work-grid-full .work-image-wrapper {
        height: 220px;
    }
}