/* ========================================
   雪山狼广告传媒 - 官网样式
   设计风格：科技感 + 工业风 + 专业
   ======================================== */

/* Reset & Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 色彩系统 - 深蓝青蓝色系 */
    --color-bg-primary: #0a0e1a;
    --color-bg-secondary: #141824;
    --color-bg-dark: #050810;
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a8b8;
    --color-text-light: #6b7280;
    --color-accent: #006080;
    --color-accent-light: #0080a0;
    --color-gold: #00a0c0;
    --color-white: #ffffff;
    
    /* 字体 */
    --font-cn: 'Noto Sans SC', sans-serif;
    --font-en: 'Orbitron', sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 96, 128, 0.1);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 14, 26, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--color-text-primary);
}

.logo-img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    border-radius: 8px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-cn {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.logo-en {
    font-family: var(--font-en);
    font-size: 0.75rem;
    color: var(--color-accent);
    letter-spacing: 0.2em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--color-text-secondary);
    transition: var(--transition-normal);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

.link-cn {
    font-size: 1rem;
    font-weight: 500;
}

.link-en {
    font-family: var(--font-en);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    opacity: 0.7;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 28px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-normal);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid-lines {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 96, 128, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 96, 128, 0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(80px, 80px); }
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 50%, rgba(0, 96, 128, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(0, 160, 192, 0.08) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 1200px;
}

/* 品牌标签 - 公司名 + 985精品服务 同一排 */
.hero-brand-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 2rem;
    background: rgba(0, 96, 128, 0.1);
    border: 1px solid rgba(0, 96, 128, 0.3);
    border-radius: 50px;
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease;
}

.brand-name-cn {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.brand-separator {
    font-size: 1rem;
    color: var(--color-accent);
}

.brand-slogan-cn {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.brand-slogan-cn .highlight-985 {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 1.3em;
    background: linear-gradient(135deg, #006080 0%, #00a0c0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px rgba(0, 96, 128, 0.5);
    transform: scale(1.1);
    margin: 0 0.05em;
}

.hero-title {
    margin-bottom: 2rem;
}

.title-main-cn {
    display: block;
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #006080 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.title-main-cn .highlight-985 {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 1.3em;
    background: linear-gradient(135deg, #006080 0%, #00a0c0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px rgba(0, 96, 128, 0.5);
    transform: scale(1.1);
    margin: 0 0.1em;
}

.title-main-en {
    display: block;
    font-family: var(--font-en);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--color-text-light);
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease 0.4s backwards;
}

/* 核心价值主张 */
.hero-value {
    text-align: center;
    margin-bottom: 3rem;
    padding: 1.5rem 3rem;
    background: linear-gradient(135deg, rgba(0, 96, 128, 0.15) 0%, rgba(0, 160, 192, 0.08) 100%);
    border: 1px solid rgba(0, 96, 128, 0.3);
    border-radius: 12px;
    display: inline-block;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.value-cn {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.15em;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 10px rgba(0, 96, 128, 0.3);
}

.value-en {
    font-family: var(--font-en);
    font-size: 1rem;
    letter-spacing: 0.25em;
    color: var(--color-accent);
}

.hero-desc {
    max-width: 900px;
    margin: 0 auto 3rem;
}

.desc-cn {
    display: block;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease 1s backwards;
}

.desc-en {
    display: block;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text-light);
    animation: fadeInUp 1s ease 1.2s backwards;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease 1.4s backwards;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-family: var(--font-en);
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-accent);
    line-height: 1;
}

.stat-unit {
    font-family: var(--font-en);
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    margin: 0.5rem 0;
}

.stat-label {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    animation: fadeInUp 1s ease 1.6s backwards;
}

.btn {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    padding: 1.25rem 2.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 96, 128, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid var(--color-text-primary);
}

.btn-outline:hover {
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
    transform: translateY(-3px);
}

.btn-en {
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    opacity: 0.8;
}

.btn-cn {
    font-size: 1rem;
    margin-top: 0.25rem;
}

.hero-scroll {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: fadeInUp 1s ease 1.8s backwards;
}

.scroll-en,
.scroll-cn {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollLine 2s ease infinite;
}

@keyframes scrollLine {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

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

/* ========================================
   Section Common Styles
   ======================================== */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

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

.section-tag {
    display: block;
    font-family: var(--font-en);
    font-size: 0.85rem;
    letter-spacing: 0.3em;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.section-tag-cn {
    display: block;
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.section-title {
    font-family: var(--font-en);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    letter-spacing: 0.1em;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.section-title-cn {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* ========================================
   About Section
   ======================================== */
.about {
    background: var(--color-bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-lead {
    margin-bottom: 2rem;
}

.lead-cn {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.lead-en {
    display: block;
    font-family: var(--font-en);
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
}

.about-text p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.about-highlights {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.highlight-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.highlight-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
    flex-shrink: 0;
}

.highlight-cn {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.highlight-en {
    display: block;
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.highlight-item p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin: 0;
}

.about-visual {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.visual-card {
    background: linear-gradient(135deg, rgba(0, 96, 128, 0.1) 0%, rgba(0, 160, 192, 0.05) 100%);
    border: 1px solid rgba(0, 96, 128, 0.2);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    transition: var(--transition-normal);
}

.visual-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 40px rgba(0, 96, 128, 0.2);
}

.visual-number {
    font-family: var(--font-en);
    font-size: 5rem;
    font-weight: 900;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 1rem;
}

.visual-number .small {
    font-size: 2rem;
}

.visual-cn {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.visual-en {
    display: block;
    font-family: var(--font-en);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
}

/* ========================================
   Services Section
   ======================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--color-bg-secondary);
    border: 1px solid rgba(0, 96, 128, 0.1);
    border-radius: 12px;
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.service-card::before {
    content: attr(data-number);
    position: absolute;
    top: -20px;
    right: -20px;
    font-family: var(--font-en);
    font-size: 8rem;
    font-weight: 900;
    color: rgba(0, 96, 128, 0.05);
    line-height: 1;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 15px 50px rgba(0, 96, 128, 0.2);
}

.service-number {
    font-family: var(--font-en);
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.service-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.service-en {
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

.service-desc {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

/* ========================================
   Process Section
   ======================================== */
.process {
    background: var(--color-bg-secondary);
}

.process-timeline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.process-step {
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.step-number {
    font-family: var(--font-en);
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.step-en {
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

.step-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.process-connector {
    width: 60px;
    height: 2px;
    background: linear-gradient(to right, var(--color-accent), transparent);
}

/* ========================================
   Cases Section
   ======================================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 300px);
    gap: 1.5rem;
}

.case-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition-normal);
}

.case-large {
    grid-row: span 2;
}

.case-placeholder {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-dark) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.placeholder-icon {
    font-size: 3rem;
    color: var(--color-accent);
    opacity: 0.3;
}

.placeholder-text {
    font-size: 1rem;
    color: var(--color-text-light);
}

.placeholder-en {
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    opacity: 0.5;
}

.case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
    opacity: 1;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

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

.case-category {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-accent);
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--color-white);
    margin-bottom: 1rem;
}

.case-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.case-en {
    font-family: var(--font-en);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    color: var(--color-text-secondary);
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background: var(--color-bg-secondary);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.contact-value {
    font-size: 1.1rem;
    color: var(--color-text-primary);
    font-weight: 600;
}

.contact-en {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

/* 联系电话旁微信二维码 */
.contact-wechat-inline {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.75rem;
    padding: 0.5rem;
    background: rgba(0, 96, 128, 0.08);
    border: 1px solid rgba(0, 96, 128, 0.2);
    border-radius: 6px;
}

.contact-wechat-qr {
    width: 60px;
    height: 60px;
    border-radius: 4px;
    background: white;
    padding: 3px;
    flex-shrink: 0;
}

.contact-wechat-inline span {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* 地图下方内嵌二维码 */
.map-qr-inline {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    padding: 0.75rem;
    background: rgba(0, 96, 128, 0.08);
    border: 1px solid rgba(0, 96, 128, 0.2);
    border-radius: 8px;
}

.map-qr-img {
    width: 80px;
    height: 80px;
    border-radius: 6px;
    background: white;
    padding: 4px;
    flex-shrink: 0;
}

.map-qr-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.map-qr-text span:first-child {
    color: var(--color-white);
    font-weight: 500;
}

.map-qr-text span:last-child {
    color: var(--color-accent);
    font-weight: 600;
}

@media (max-width: 768px) {
    .map-qr-inline {
        flex-direction: column;
        text-align: center;
    }
    
    .map-qr-text {
        align-items: center;
    }
}

.contact-cta {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .contact-cta {
        grid-template-columns: 1fr;
    }
}

.cta-right-section {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.cta-right-section .cta-card {
    border-radius: 12px 12px 0 0;
    border-bottom: none;
    margin-bottom: 0;
}

.cta-right-section .message-form {
    border-radius: 0 0 12px 12px;
    border-top: none;
    margin-top: 0;
}

.cta-card {
    background: linear-gradient(135deg, rgba(0, 96, 128, 0.15) 0%, rgba(0, 160, 192, 0.08) 100%);
    border: 1px solid rgba(0, 96, 128, 0.3);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
}

.wechat-qr-card {
    background: linear-gradient(135deg, rgba(0, 96, 128, 0.15) 0%, rgba(0, 160, 192, 0.08) 100%);
    border: 1px solid rgba(0, 96, 128, 0.3);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
    align-self: end;
}

.qr-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.qr-en {
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.qr-image {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    margin: 0 auto 0.75rem;
    display: block;
    background: white;
    padding: 4px;
}

.qr-hint {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.qr-phone {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-accent);
}

.message-form {
    background: rgba(0, 96, 128, 0.08);
    border: 1px solid rgba(0, 96, 128, 0.25);
    border-radius: 12px;
    padding: 2.5rem;
    margin-top: 2rem;
}

.form-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.form-en {
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

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

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 96, 128, 0.3);
    border-radius: 8px;
    color: var(--color-white);
    font-family: var(--font-cn);
    font-size: 1rem;
    transition: var(--transition-fast);
}

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

.form-group label {
    position: absolute;
    top: -0.6rem;
    left: 1rem;
    background: var(--color-bg-secondary);
    padding: 0 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.form-group .required {
    color: var(--color-accent);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.btn-submit {
    width: 100%;
    padding: 1.25rem;
    font-size: 1.1rem;
    cursor: pointer;
    border: none;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 96, 128, 0.4);
}
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.cta-en {
    font-family: var(--font-en);
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

.cta-desc {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.btn-large {
    padding: 1.5rem 3rem;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-bg-dark);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.footer-logo-img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    border-radius: 8px;
}

.footer-logo-cn {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.footer-logo-en {
    display: block;
    font-family: var(--font-en);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    color: var(--color-accent);
}

.footer-desc {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
}

.footer-title span {
    display: block;
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

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

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

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-normal);
}

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

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 96, 128, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.footer-en {
    font-family: var(--font-en);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

/* ========================================
   Materials Section - 图片为主的设计
   ======================================== */
.materials {
    background: var(--color-bg-secondary);
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.material-category {
    background: var(--color-bg-primary);
    border: 1px solid rgba(0, 96, 128, 0.1);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition-normal);
}

.material-category:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(0, 96, 128, 0.2);
}

.category-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, rgba(0, 96, 128, 0.1) 0%, rgba(0, 160, 192, 0.05) 100%);
    border-bottom: 2px solid var(--color-accent);
}

.category-header .title-cn {
    display: block;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.category-header .title-en {
    display: block;
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
}

.material-items {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    padding: 2rem;
}

.material-item {
    background: rgba(0, 96, 128, 0.03);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.material-item:hover {
    background: rgba(0, 96, 128, 0.08);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 96, 128, 0.15);
}

.material-image-wrapper {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(135deg, rgba(0, 96, 128, 0.05) 0%, rgba(0, 160, 192, 0.03) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.material-image-wrapper img,
.material-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
    display: block;
    position: relative;
    z-index: 1;
}

.material-item:hover .material-image-wrapper img {
    transform: scale(1.05);
}

.material-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.material-placeholder .placeholder-icon {
    font-size: 3rem;
    color: var(--color-accent);
    opacity: 0.3;
}

.material-info {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.material-name {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.name-cn {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.name-en {
    font-family: var(--font-en);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--color-text-light);
}

.material-spec {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.material-price {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    margin-top: 0.5rem;
}

.price-value {
    font-family: var(--font-en);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
}

.price-unit {
    font-size: 0.7rem;
    color: var(--color-text-light);
}

.materials-note {
    text-align: center;
    padding: 1.5rem;
    background: rgba(0, 96, 128, 0.05);
    border-radius: 8px;
    border: 1px dashed rgba(0, 96, 128, 0.3);
}

.materials-note p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.materials-note p:last-child {
    margin-bottom: 0;
    font-size: 0.8rem;
    color: var(--color-text-light);
}

/* ========================================
   Responsive - Materials
   ======================================== */
@media (max-width: 1024px) {
    .materials-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .material-items {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .materials-grid {
        grid-template-columns: 1fr;
    }
    
    .material-items {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .material-items {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Cases Section - Enhanced
   ======================================== */
.cases-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: 1px solid rgba(0, 96, 128, 0.3);
    border-radius: 50px;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-normal);
}

.filter-btn span {
    display: block;
    font-family: var(--font-en);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    opacity: 0.7;
    margin-top: 0.25rem;
}

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

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.case-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition-normal);
    aspect-ratio: 4/3;
}

.case-card.case-large {
    grid-column: span 2;
    grid-row: span 2;
    aspect-ratio: auto;
    min-height: 500px;
}

.case-card.case-large .case-image {
    object-fit: contain;
    object-position: center center;
    background: linear-gradient(135deg, #0a0e1a 0%, #1a2040 100%);
}

.case-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
    display: block;
    position: relative;
    z-index: 1;
}

.case-card:hover .case-image {
    transform: scale(1.05);
}

.case-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10, 14, 26, 0.95) 0%, rgba(10, 14, 26, 0.7) 40%, rgba(10, 14, 26, 0.3) 70%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 2rem;
    opacity: 1;
    transition: var(--transition-normal);
}

.case-card.case-large .case-overlay {
    padding: 2rem;
    background: linear-gradient(to top, rgba(10, 14, 26, 0.95) 0%, rgba(10, 14, 26, 0.6) 35%, transparent 55%);
}

.case-card.case-large .case-title {
    font-size: 1.8rem;
}

.case-card.case-large .case-desc {
    font-size: 1rem;
    max-width: 500px;
}

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

.case-overlay .case-category {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-accent);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--color-white);
    margin-bottom: 1rem;
    width: fit-content;
}

.case-overlay .case-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.case-overlay .case-en {
    font-family: var(--font-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.case-overlay .case-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.cases-more {
    text-align: center;
}

/* ========================================
   Responsive - Materials & Cases
   ======================================== */
@media (max-width: 1024px) {
    .materials-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .cases-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .case-card.case-large {
        grid-column: span 1;
        grid-row: span 1;
        aspect-ratio: 4/3;
    }
}

@media (max-width: 768px) {
    .materials-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-filter {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }
    
    .case-large {
        grid-row: span 1;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--color-bg-primary);
        flex-direction: column;
        padding: 6rem 2rem;
        transition: var(--transition-normal);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .process-timeline {
        flex-direction: column;
    }
    
    .process-connector {
        width: 2px;
        height: 40px;
        background: linear-gradient(to bottom, var(--color-accent), transparent);
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .title-main-cn {
        font-size: 2rem;
    }
    
    .section-title-cn {
        font-size: 1.5rem;
    }
}

/* ========================================
   WeChat Float Button
   ======================================== */
.wechat-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
}

.float-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #07c160 0%, #06ad56 100%);
    border: none;
    color: white;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(7, 193, 96, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
}

.float-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(7, 193, 96, 0.6);
}

.float-btn::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(7, 193, 96, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.float-text {
    font-size: 12px;
    margin-top: 2px;
    font-weight: 500;
}

.float-qrcode {
    position: absolute;
    bottom: 70px;
    right: 0;
    width: 200px;
    background: white;
    border-radius: 12px;
    padding: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.float-qrcode.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.float-qrcode img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

.float-qrcode p {
    text-align: center;
    color: #333;
    font-size: 14px;
    margin-top: 10px;
    font-weight: 500;
}

.close-qrcode {
    position: absolute;
    top: 5px;
    right: 10px;
    font-size: 20px;
    color: #999;
    cursor: pointer;
    line-height: 1;
}

.close-qrcode:hover {
    color: #333;
}

/* Mobile Adjustments for Float Button */
@media (max-width: 768px) {
    .wechat-float {
        bottom: 20px;
        right: 20px;
    }
    
    .float-btn {
        width: 50px;
        height: 50px;
    }
    
    .float-btn svg {
        width: 24px;
        height: 24px;
    }
    
    .float-text {
        font-size: 10px;
    }
    
    .float-qrcode {
        width: 180px;
        bottom: 60px;
    }
}