/* ===== 变量定义 ===== */
:root {
    --gold: #c9a962;
    --gold-light: #e8d5a3;
    --gold-dark: #a08040;
    --black: #0a0a0a;
    --black-light: #141414;
    --black-lighter: #1a1a1a;
    --gray: #666;
    --gray-light: #999;
    --white: #ffffff;
    --white-muted: rgba(255, 255, 255, 0.9);
    
    --font-serif: 'Noto Serif SC', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: #0d0d0d;
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(201, 169, 98, 0.1);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 13px;
}

.logo-img {
    height: 52px;
    width: auto;
    margin-right: -4px;
    margin-top: -6px;
}

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

.logo-main {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
    letter-spacing: 2px;
}

.logo-sub {
    font-size: 0.65rem;
    color: var(--gold);
    letter-spacing: 3px;
    font-weight: 500;
}

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

.nav-links a {
    color: #ddd;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 400;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gold);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--white);
}

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

.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(201, 169, 98, 0.1);
    border: 1px solid rgba(201, 169, 98, 0.3);
    border-radius: 4px;
    color: var(--gold);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.nav-phone:hover {
    background: rgba(201, 169, 98, 0.2);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
    padding: 10px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.hamburger span {
    width: 24px;
    height: 1px;
    background: var(--white);
    transition: var(--transition);
}

/* ===== Hero区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 140px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 50%, #0f0f0f 100%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, transparent 0%, rgba(10, 10, 10, 0.4) 100%);
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(201, 169, 98, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(201, 169, 98, 0.03) 0%, transparent 50%);
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
    color: var(--gold);
    font-size: 0.75rem;
    letter-spacing: 4px;
    font-weight: 500;
}

.badge-line {
    width: 40px;
    height: 1px;
    background: var(--gold);
    opacity: 0.5;
}

.hero-title {
    margin-bottom: 32px;
}

.title-small {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 400;
    color: rgba(255,255,255,0.92);
    letter-spacing: 8px;
    margin-bottom: 16px;
}

.title-large {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 600;
    color: var(--white);
    letter-spacing: 4px;
    line-height: 1.2;
}

.title-large-main {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 50%, var(--gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 6px;
    line-height: 1.1;
    margin-bottom: 20px;
}

.title-small-sub {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    font-weight: 400;
    color: rgba(255,255,255,0.9);
    letter-spacing: 4px;
    line-height: 1.4;
}

.hero-desc {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: #e0e0e0;
    margin-bottom: 48px;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
    margin-bottom: 48px;
}

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

.stat-num {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 600;
    color: var(--gold);
    line-height: 1;
}

.stat-unit {
    font-size: 1rem;
    color: var(--gold);
    margin-left: 4px;
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: #aaa;
    margin-top: 8px;
    letter-spacing: 2px;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: rgba(201, 169, 98, 0.3);
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--gold-light);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    border-color: var(--gold);
    color: var(--gold);
}

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

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

.scroll-hint span {
    display: block;
    font-size: 0.7rem;
    color: rgba(255,255,255,0.92);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--gold), transparent);
    margin: 0 auto;
    animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* ===== 通用区域样式 ===== */
section {
    padding: 120px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header.light {
    color: var(--white);
}

.section-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--gold);
    letter-spacing: 4px;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--black);
}

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

.section-subtitle {
    font-size: 1.1rem;
    color: #444;
    max-width: 600px;
    margin: 0 auto;
}

.section-header.light .section-subtitle {
    color: rgba(255,255,255,0.92);
}

/* ===== 品牌故事 ===== */
.about {
    background: var(--white);
    color: var(--black);
}

.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-quote {
    margin-bottom: 40px;
    padding-left: 24px;
    border-left: 3px solid var(--gold);
}

.quote-mark {
    font-family: var(--font-serif);
    font-size: 4rem;
    color: var(--gold);
    line-height: 1;
    opacity: 0.5;
}

.about-quote p {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    line-height: 1.6;
    margin-top: -20px;
}

.about-quote strong {
    color: var(--gold-dark);
}

.about-body {
    margin-bottom: 48px;
}

.about-body p {
    margin-bottom: 20px;
    color: #333;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature {
    text-align: center;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature h4 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--black);
}

.feature p {
    font-size: 0.85rem;
    color: #444;
}

.about-visual {
    position: sticky;
    top: 120px;
}

.visual-card {
    background: var(--black);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

.visual-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    background: var(--gold);
    color: var(--black);
    padding: 8px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 2px;
}

.visual-content {
    padding: 48px;
    color: var(--white);
}

.visual-content h3 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    margin-bottom: 8px;
}

.visual-content p {
    color: #ccc;
    margin-bottom: 24px;
}

.visual-addr {
    font-size: 0.85rem;
    color: var(--gold);
    letter-spacing: 2px;
}

/* ===== 解决方案 ===== */
.solutions {
    background: #121212;
}

.solution-block {
    background: #1a1a1a;
    border-radius: 12px;
    padding: 48px;
    margin-bottom: 32px;
    border: 1px solid rgba(201, 169, 98, 0.1);
}

.solution-header {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(201, 169, 98, 0.2);
}

.solution-num {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 600;
    color: var(--gold);
    opacity: 0.5;
    line-height: 1;
}

.solution-header h3 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    margin-bottom: 8px;
}

.solution-header p {
    color: #d0d0d0;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.capability-card {
    background: #151515;
    padding: 32px;
    border-radius: 8px;
    border: 1px solid rgba(201, 169, 98, 0.1);
    transition: var(--transition);
}

.capability-card:hover {
    border-color: rgba(201, 169, 98, 0.3);
    transform: translateY(-4px);
}

.capability-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.capability-card h4 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.capability-card p {
    font-size: 0.9rem;
    color: var(--gold);
    margin-bottom: 12px;
}

.capability-value {
    display: block;
    font-size: 0.85rem;
    color: #bbb;
    line-height: 1.6;
}

/* 硬件展示 */
.hardware-showcase {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 24px;
    margin-top: 40px;
}

.hardware-info,
.hardware-brand {
    background: #141414;
    padding: 32px;
    border-radius: 8px;
    border: 1px solid rgba(201, 169, 98, 0.2);
}

.hardware-tag,
.brand-tag {
    display: inline-block;
    font-size: 0.7rem;
    color: var(--gold);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.hardware-info h4,
.hardware-brand h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.hardware-info p,
.hardware-brand p {
    font-size: 0.9rem;
    color: #bbb;
    margin-bottom: 16px;
}

.hardware-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.hardware-specs span {
    background: rgba(201, 169, 98, 0.1);
    color: var(--gold);
    padding: 6px 12px;
    font-size: 0.75rem;
    border-radius: 4px;
}

/* 影院方案 */
.cinema-block {
    background: linear-gradient(135deg, var(--black-lighter) 0%, rgba(201, 169, 98, 0.05) 100%);
    border-color: rgba(201, 169, 98, 0.2);
}

.cinema-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.cinema-brand {
    padding-right: 24px;
    border-right: 1px solid rgba(201, 169, 98, 0.2);
}

.brand-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.brand-header h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
}

.brand-badge {
    background: var(--gold);
    color: var(--black);
    padding: 4px 10px;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 1px;
    border-radius: 4px;
}

.brand-desc {
    font-size: 0.9rem;
    color: #ccc;
    margin-bottom: 24px;
    line-height: 1.7;
}

.cinema-config h5 {
    font-size: 0.9rem;
    color: var(--gold);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.cinema-config ul {
    list-style: none;
}

.cinema-config li {
    padding: 8px 0;
    padding-left: 16px;
    position: relative;
    font-size: 0.9rem;
    color: #ccc;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.cinema-config li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--gold);
    border-radius: 50%;
}

.cinema-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.feature-card {
    background: #141414;
    padding: 24px;
    border-radius: 8px;
    border: 1px solid rgba(201, 169, 98, 0.1);
}

.feature-tag {
    display: inline-block;
    font-size: 0.65rem;
    color: var(--gold);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.feature-card h5 {
    font-family: var(--font-serif);
    font-size: 1rem;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 0.85rem;
    color: #bbb;
    line-height: 1.5;
}

/* ===== 智能生活场景 ===== */
.scenarios {
    background: #0f0f0f;
    padding: 120px 0;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.scenario-block {
    background: #1a1a1a;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(201, 169, 98, 0.15);
}

.scenario-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 28px;
    background: linear-gradient(135deg, rgba(201, 169, 98, 0.1) 0%, transparent 100%);
    border-bottom: 1px solid rgba(201, 169, 98, 0.15);
}

.scenario-icon {
    font-size: 2.5rem;
}

.scenario-header h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: 4px;
}

.scenario-header p {
    font-size: 0.85rem;
    color: var(--gold);
    letter-spacing: 1px;
}

.scenario-content {
    padding: 24px;
}

.scenario-item {
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.scenario-item:last-child {
    border-bottom: none;
}

.scenario-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #f0f0f0;
    margin-bottom: 6px;
}

.scenario-item p {
    font-size: 0.85rem;
    color: #aaa;
    line-height: 1.5;
}

@media (max-width: 1024px) {
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .scenario-block {
        margin-bottom: 20px;
    }
    
    .scenario-header {
        padding: 20px;
    }
    
    .scenario-content {
        padding: 16px;
    }
    
    .scenario-item {
        padding: 12px 0;
    }
    
    .hardware-showcase {
        grid-template-columns: 1fr;
    }
    
    .solution-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .solution-num {
        font-size: 2rem;
    }
    
    .title-small {
        font-size: 1rem;
        letter-spacing: 4px;
    }
    
    .title-large {
        font-size: 1.8rem;
        letter-spacing: 2px;
    }
    
    .hero-desc {
        font-size: 0.95rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.85rem;
    }
}

/* ===== 为什么选择博云 ===== */
.why-us {
    background: var(--white);
    color: var(--black);
}

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.reason-card {
    background: #141414;
    color: var(--white);
    padding: 32px;
    border-radius: 8px;
    transition: var(--transition);
}

.reason-card:hover {
    transform: translateY(-8px);
    background: linear-gradient(135deg, var(--black) 0%, rgba(201, 169, 98, 0.1) 100%);
}

.reason-num {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 600;
    color: var(--gold);
    opacity: 0.5;
    margin-bottom: 16px;
    line-height: 1;
}

.reason-card h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.reason-card p {
    font-size: 0.9rem;
    color: #ccc;
    line-height: 1.6;
}

/* ===== 精品案例 ===== */
.cases {
    background: var(--white);
    color: var(--black);
}

.cases-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 24px;
}

.case-card {
    background: #131313;
    border-radius: 8px;
    overflow: hidden;
    color: var(--white);
}

.case-card.large {
    grid-row: span 1;
}

.case-image {
    height: 240px;
    background: linear-gradient(135deg, var(--black-lighter) 0%, var(--black) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-card.large .case-image {
    height: 300px;
}

.case-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--gold);
    letter-spacing: 4px;
    border: 2px dashed rgba(201, 169, 98, 0.3);
    margin: 20px;
    width: calc(100% - 40px);
    height: calc(100% - 40px);
    border-radius: 4px;
}

.case-content {
    padding: 24px;
}

.case-tag {
    display: inline-block;
    font-size: 0.7rem;
    color: var(--gold);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.case-content h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.case-content p {
    font-size: 0.9rem;
    color: #ccc;
    line-height: 1.6;
    margin-bottom: 16px;
}

.case-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: #999;
}

.case-price {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.8rem;
    color: var(--gold);
}

/* ===== 技术对比 ===== */
.tech-compare-section {
    background: #0d0d0d;
    padding: 120px 0;
}

.compare-table {
    max-width: 1000px;
    margin: 0 auto;
    background: #181818;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(201, 169, 98, 0.1);
}

.compare-header {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1.5fr;
    background: rgba(201, 169, 98, 0.1);
    padding: 20px 24px;
    font-weight: 600;
    font-size: 0.9rem;
}

.compare-row {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1.5fr;
    padding: 20px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.9rem;
}

.compare-row:hover {
    background: rgba(255, 255, 255, 0.02);
}

.compare-col:first-child {
    color: var(--gold);
    font-weight: 500;
}

.compare-col.closed {
    color: #888;
}

.compare-col.open {
    color: var(--gold);
}

/* ===== 联系我们 ===== */
.contact {
    background: #121212;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
}

.contact-tag {
    display: inline-block;
    font-size: 0.7rem;
    color: var(--gold);
    letter-spacing: 4px;
    margin-bottom: 24px;
}

.contact-info h2 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 24px;
    line-height: 1.3;
}

.contact-info > p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.92);
    margin-bottom: 48px;
}

.contact-details {
    display: grid;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-icon {
    font-size: 1.25rem;
}

.contact-item h4 {
    font-size: 0.8rem;
    color: var(--gold);
    letter-spacing: 2px;
    margin-bottom: 4px;
}

.contact-item p {
    color: #ddd;
}

.contact-form-wrapper {
    background: #1c1c1c;
    padding: 48px;
    border-radius: 8px;
    border: 1px solid rgba(201, 169, 98, 0.1);
}

.contact-form h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: 32px;
    text-align: center;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 16px;
    background: #0f0f0f;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    color: var(--white);
    font-size: 0.95rem;
    font-family: var(--font-sans);
    transition: var(--transition);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #555;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

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

/* ===== 页脚 ===== */
.footer {
    background: #0a0a0a;
    padding: 60px 0 30px;
    border-top: 1px solid rgba(201, 169, 98, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-logo {
    height: 48px;
}

.footer-brand-text {
    display: flex;
    flex-direction: column;
}

.footer-name {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
}

.footer-desc {
    color: rgba(255,255,255,0.92);
    font-size: 0.85rem;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: rgba(255,255,255,0.92);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: #888;
    font-size: 0.8rem;
    margin-bottom: 4px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-visual {
        position: static;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .hardware-showcase {
        grid-template-columns: 1fr;
    }
    
    .cinema-content {
        grid-template-columns: 1fr;
    }
    
    .cinema-brand {
        padding-right: 0;
        border-right: none;
        border-bottom: 1px solid rgba(201, 169, 98, 0.2);
        padding-bottom: 32px;
    }
    
    .cinema-features {
        grid-template-columns: 1fr 1fr;
    }
    
    .reasons-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .case-card.large {
        grid-column: span 2;
    }
    
    .compare-header,
    .compare-row {
        grid-template-columns: 1fr 1fr 1fr;
        font-size: 0.8rem;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .navbar .container {
        padding: 8px 12px;
        flex-direction: column;
        gap: 6px;
    }
    
    .logo {
        transition: all 0.3s ease;
    }
    
    .navbar.scrolled .logo {
        opacity: 0;
        height: 0;
        overflow: hidden;
        margin: 0;
        padding: 0;
    }
    
    .logo-img {
        height: 30px;
        margin-top: -3px;
    }
    
    .logo-main {
        font-size: 1rem;
        letter-spacing: 1px;
    }
    
    .logo-sub {
        font-size: 0.6rem;
    }
    
    .nav-links {
        display: flex !important;
        gap: 6px;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav-links a {
        font-size: 0.8rem;
        white-space: nowrap;
        letter-spacing: 0;
    }
    
    .nav-phone {
        display: none;
    }
    
    .hamburger {
        display: none;
    }
    
    .hero {
        padding-top: 140px;
    }
    
    .hero {
        padding: 120px 20px 60px;
    }
    
    .title-large-main {
        font-size: clamp(2.2rem, 10vw, 3.5rem);
        letter-spacing: 3px;
    }
    
    .title-small-sub {
        font-size: 0.9rem;
        letter-spacing: 2px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .stat-divider {
        width: 60px;
        height: 1px;
    }
    
    .solution-block {
        padding: 24px;
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
    }
    
    .cinema-features {
        grid-template-columns: 1fr;
    }
    
    .reasons-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .case-card.large {
        grid-column: span 1;
    }
    
    .compare-header,
    .compare-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .compare-col.closed::before {
        content: '传统: ';
        color: #888;
        font-weight: 500;
    }
    
    .compare-col.open::before {
        content: '博云: ';
        color: var(--gold);
        font-weight: 500;
    }
    
    .compare-table {
        font-size: 0.85rem;
    }
    
    .compare-header,
    .compare-row {
        padding: 12px 16px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    
    .footer-brand {
        flex-direction: column;
    }
    
    .footer-logo {
        height: 64px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .container {
        padding: 0 16px;
    }
}