/* AI生成 */
/* ==================== 基础重置 ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #1a1f3a;
    --color-primary-light: #2a3458;
    --color-accent: #c9a96e;
    --color-accent-light: #e0c896;
    --color-accent-gradient: linear-gradient(135deg, #c9a96e 0%, #e0c896 100%);
    --color-bg: #ffffff;
    --color-bg-alt: #f7f8fc;
    --color-bg-warm: #faf9f6;
    --color-text: #2c2c2c;
    --color-text-light: #6b6b6b;
    --color-border: #e5e7eb;
    --color-white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 60px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.06);
    border-bottom: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.95);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

.nav-logo:hover {
    transform: scale(1.02);
}

.logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-light);
    position: relative;
    transition: var(--transition);
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-gradient);
    transition: var(--transition);
    border-radius: 1px;
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
    border-radius: 2px;
}

.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(7px, -7px);
}

/* ==================== Hero 首页 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #1a1f3a 0%, #2a3458 40%, #1a1f3a 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(201, 169, 110, 0.18) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(201, 169, 110, 0.12) 0%, transparent 50%);
    animation: heroGlow 8s ease-in-out infinite alternate;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
}

@keyframes heroGlow {
    0% { transform: scale(1) rotate(0deg); opacity: 0.8; }
    100% { transform: scale(1.1) rotate(5deg); opacity: 1; }
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
    padding: 80px 24px 40px;
    animation: fadeInUp 1s ease;
}

.hero-logo {
    width: 100px;
    height: auto;
    margin: 0 auto 28px;
    filter: brightness(0) invert(1);
    opacity: 0.9;
    animation: logoFloat 4s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 900;
    letter-spacing: 2px;
    margin-bottom: 16px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, #ffffff 0%, #e0c896 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    font-weight: 300;
    color: var(--color-accent-light);
    letter-spacing: 4px;
    margin-bottom: 24px;
}

.hero-divider {
    width: 60px;
    height: 3px;
    background: var(--color-accent-gradient);
    margin: 0 auto 24px;
    border-radius: 2px;
    position: relative;
}

.hero-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--color-accent);
}

.hero-desc {
    font-size: 1rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.8;
    margin-bottom: 36px;
}

.hero-btn {
    display: inline-block;
    padding: 14px 40px;
    background: transparent;
    border: 2px solid var(--color-accent);
    color: var(--color-accent-light);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 1px;
    border-radius: 4px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.hero-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-accent-gradient);
    transition: left 0.4s ease;
    z-index: -1;
}

.hero-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(201, 169, 110, 0.4);
}

.hero-btn:hover::before {
    left: 0;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.scroll-indicator span {
    width: 4px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 2px;
    animation: scrollDown 1.5s infinite;
}

@keyframes scrollDown {
    0% { opacity: 0; transform: translateY(0); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateY(12px); }
}

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

/* ==================== 页面切换（分页显示） ==================== */
section[id] {
    display: none;
}

section[id].active-section {
    display: block;
    animation: pageEnter 0.5s ease;
}

#home.active-section {
    display: flex;
    animation: fadeInUp 0.8s ease;
}

@keyframes pageEnter {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==================== 通用 Section ==================== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 4px;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    position: relative;
    display: inline-block;
    padding-bottom: 16px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--color-accent-gradient);
    border-radius: 2px;
}

.section-desc {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-top: 16px;
    font-weight: 300;
    letter-spacing: 1px;
}

.about .section-desc,
.business .section-desc {
    color: rgba(255, 255, 255, 0.55);
}

/* ==================== 关于我们 ==================== */
.about {
    background: linear-gradient(135deg, #1a1f3a 0%, #232b4d 50%, #1a1f3a 100%);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 15% 25%, rgba(201, 169, 110, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 85% 75%, rgba(201, 169, 110, 0.08) 0%, transparent 45%);
    animation: aboutGlow 10s ease-in-out infinite alternate;
}

.about::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 30px 30px;
    opacity: 0.6;
}

@keyframes aboutGlow {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.08); opacity: 1; }
}

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

.about .section-label {
    color: var(--color-accent-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.about-text p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-text p:first-child {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
}

.about-text p:nth-child(2) {
    border-left: 3px solid var(--color-accent);
    padding-left: 20px;
}

.about-quote {
    margin-top: 28px;
    padding: 20px 24px;
    background: rgba(201, 169, 110, 0.06);
    border-radius: 12px;
    border: 1px solid rgba(201, 169, 110, 0.15);
    position: relative;
}

.about-quote p {
    font-size: 0.95rem !important;
    color: rgba(224, 200, 150, 0.85) !important;
    line-height: 1.8;
    margin-bottom: 0 !important;
    font-style: italic;
    border-left: none !important;
    padding-left: 0 !important;
}

.quote-mark {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-accent);
    opacity: 0.4;
    line-height: 0;
    vertical-align: -0.4em;
    margin-right: 4px;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 28px 24px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-accent-gradient);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.stat-item::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -50%;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(201, 169, 110, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    transition: var(--transition-slow);
    opacity: 0;
}

.stat-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(201, 169, 110, 0.4);
    background: rgba(255, 255, 255, 0.08);
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-item:hover::after {
    opacity: 1;
    bottom: -30%;
    right: -30%;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, #e0c896 0%, #c9a96e 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-plus {
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-accent);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
    letter-spacing: 1px;
}

/* ==================== 业务板块 ==================== */
.business {
    background: linear-gradient(160deg, #15192f 0%, #1e2545 50%, #15192f 100%);
    position: relative;
    overflow: hidden;
}

.business::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 80% 20%, rgba(201, 169, 110, 0.1) 0%, transparent 45%),
        radial-gradient(circle at 20% 80%, rgba(201, 169, 110, 0.08) 0%, transparent 45%);
    animation: businessGlow 12s ease-in-out infinite alternate;
}

.business::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 50px 50px;
}

@keyframes businessGlow {
    0% { transform: scale(1) rotate(0deg); opacity: 0.7; }
    100% { transform: scale(1.1) rotate(3deg); opacity: 1; }
}

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

.business .section-label {
    color: var(--color-accent-light);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    position: relative;
    z-index: 1;
}

.business-card {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 40px 36px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    transition: var(--transition-slow);
    border: 1px solid rgba(255, 255, 255, 0.08);
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--color-accent-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.business-card::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(201, 169, 110, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    transition: var(--transition-slow);
    opacity: 0;
}

.business-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    border-color: rgba(201, 169, 110, 0.3);
    background: rgba(255, 255, 255, 0.07);
}

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

.business-card:hover::after {
    opacity: 1;
    bottom: -30%;
    right: -30%;
}

.business-card.large {
    grid-column: span 2;
}

.card-number {
    position: absolute;
    top: 28px;
    right: 32px;
    font-size: 3rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.04);
    line-height: 1;
    z-index: 0;
    transition: var(--transition-slow);
}

.business-card:hover .card-number {
    color: rgba(201, 169, 110, 0.12);
}

.card-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-light);
    margin-bottom: 24px;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.card-avatar {
    width: 76px;
    height: 76px;
    margin-bottom: 24px;
    padding: 0;
    border-radius: 16px;
    background: #faf8f5;
    border: 1.5px solid rgba(201, 169, 110, 0.5);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-end;
    transition: var(--transition);
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.card-avatar__logo {
    width: 100%;
    flex: 1;
    min-height: 0;
    object-fit: contain;
    object-position: center;
    background: #faf8f5;
    padding: 6px 4px 2px;
}

.card-avatar__tag {
    font-family: Arial, 'Helvetica Neue', sans-serif;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    line-height: 1;
    text-align: center;
    text-transform: uppercase;
    color: var(--color-primary);
    background: var(--color-accent-gradient);
    padding: 6px 0;
    width: 100%;
}

.business-card:hover .card-icon {
    background: var(--color-accent-gradient);
    color: var(--color-primary);
    transform: rotate(-5deg) scale(1.05);
}

.business-card:hover .card-avatar {
    transform: scale(1.08);
    border-color: rgba(201, 169, 110, 0.8);
    box-shadow: 0 6px 24px rgba(201, 169, 110, 0.4);
}

.business-card:hover .card-avatar__tag {
    background: linear-gradient(135deg, #e0c896 0%, #f0ddb0 100%);
    color: var(--color-primary);
}

.card-icon svg {
    width: 28px;
    height: 28px;
}

.card-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.card-tagline {
    font-size: 0.9rem;
    color: var(--color-accent-light);
    font-weight: 500;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.card-desc {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.8;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.card-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    position: relative;
    z-index: 1;
}

.feature-tag {
    font-size: 0.8rem;
    padding: 5px 14px;
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.business-card:hover .feature-tag {
    border-color: rgba(201, 169, 110, 0.4);
    color: var(--color-accent-light);
    background: rgba(201, 169, 110, 0.08);
}

/* 即将上线 */
.business-card.coming-soon {
    opacity: 0.7;
}

.coming-soon-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--color-accent-gradient);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    letter-spacing: 1px;
    z-index: 2;
    box-shadow: 0 2px 12px rgba(201, 169, 110, 0.4);
}

/* ==================== 联系我们 ==================== */
.contact {
    background: var(--color-primary);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 20%, rgba(201, 169, 110, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(201, 169, 110, 0.08) 0%, transparent 40%);
}

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

.contact .section-label {
    color: var(--color-accent-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(201, 169, 110, 0.3);
    transform: translateX(8px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-light);
    flex-shrink: 0;
    transition: var(--transition);
}

.contact-item:hover .contact-icon {
    background: var(--color-accent-gradient);
    color: var(--color-primary);
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

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

.contact-label {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 2px;
}

.contact-value {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-white);
}

.contact-cta h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-accent-light);
}

.contact-cta p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 28px;
}

.contact-btn {
    display: inline-block;
    padding: 14px 40px;
    background: var(--color-accent-gradient);
    color: var(--color-primary);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 4px;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(201, 169, 110, 0.2);
}

.contact-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(201, 169, 110, 0.4);
}

/* ==================== 页脚 ==================== */
.footer {
    background: #12162b;
    color: rgba(255, 255, 255, 0.6);
    padding: 50px 0 30px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0.5;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

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

.footer-logo {
    height: 36px;
    width: auto;
    filter: brightness(0) invert(1);
    opacity: 0.8;
}

.footer-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
}

.footer-slogan {
    font-size: 0.82rem;
    color: var(--color-accent);
    margin-left: 12px;
    padding-left: 12px;
    border-left: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-right {
    text-align: right;
}

.footer-links {
    display: flex;
    gap: 20px;
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    transition: var(--transition);
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition);
}

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

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

.footer-copyright {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.35);
}

/* ==================== 动画 ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ==================== 响应式 ==================== */
@media (max-width: 900px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-stats {
        flex-direction: row;
        justify-content: space-around;
    }

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

    .business-card.large {
        grid-column: span 1;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

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

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--color-white);
        flex-direction: column;
        gap: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        box-shadow: var(--shadow-md);
    }

    .nav-menu.active {
        max-height: 320px;
    }

    .nav-menu li {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid var(--color-border);
    }

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

    .nav-link {
        display: block;
        padding: 16px 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        letter-spacing: 2px;
    }

    .hero-desc {
        font-size: 0.9rem;
    }

    section {
        padding: 70px 0;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .about-stats {
        flex-direction: column;
        gap: 16px;
    }

    .footer-slogan {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
    }
}