/* ===== 全局重置与变量 ===== */
:root {
    /* 品牌色 - 取自房诸葛Logo深红色 */
    --primary: #8B1A1A;
    --primary-dark: #6B1212;
    --primary-darker: #4a0c0c;
    --primary-light: #FCE8E8;
    --primary-lighter: #FDF5F5;
    --primary-soft: #F8E8E8;

    /* 点缀色 - 金色 */
    --accent: #D4A44A;
    --accent-light: #FDF6E8;

    --text-dark: #1a1a1a;
    --text-body: #4a4a4a;
    --text-light: #777777;
    --bg-white: #ffffff;
    --bg-light: #FDF8F5;
    --bg-gray: #f0f0f0;
    --border: #E8E0DC;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-body);
    background: var(--bg-white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

/* ===== 通用组件 ===== */
.section {
    padding: 100px 0;
    position: relative;
}

.section:nth-child(even) {
    background: var(--bg-light);
}

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

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 18px;
    border-radius: 30px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-light);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 36px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(139, 26, 26, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(139, 26, 26, 0.4);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #fff;
}

.btn-lg {
    padding: 16px 48px;
    font-size: 1.05rem;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-logo-img {
    height: 40px;
    width: auto;
    max-width: 180px;
    display: block;
    object-fit: contain;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-body);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
    border-radius: 2px;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero 首页 ===== */
.hero {
    position: relative;
    min-height: 720px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 140px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #4a0c0c 0%, #6B1212 30%, #8B1A1A 70%, #9e2a2a 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(212, 164, 74, 0.18) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
    max-width: 820px;
    margin-bottom: 24px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px 22px;
    border-radius: 50px;
    font-size: 0.88rem;
    font-weight: 500;
    margin-bottom: 32px;
    color: rgba(255, 255, 255, 0.95);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
    font-size: 4.2rem;
    font-weight: 900;
    margin-bottom: 20px;
    letter-spacing: 4px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 24px;
    opacity: 0.95;
    letter-spacing: 2px;
}

.hero-desc {
    font-size: 1.05rem;
    line-height: 2;
    opacity: 0.85;
    margin-bottom: 40px;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-top: 48px;
    width: 100%;
    max-width: 960px;
}

.stat-item {
    text-align: center;
    color: #fff;
}

.stat-num {
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 8px;
    color: var(--accent);
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.85;
    letter-spacing: 1px;
}

/* ===== 关于我们 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    margin-bottom: 80px;
    align-items: start;
}

.about-text {
    font-size: 1.02rem;
    line-height: 2;
}

.about-lead {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 20px;
    line-height: 1.9;
}

.about-text p {
    margin-bottom: 16px;
}

.about-text strong {
    color: var(--primary);
}

.about-qual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.qual-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px 20px;
    transition: var(--transition);
}

.qual-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.qual-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.qual-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.qual-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* 发展历程 */
.timeline {
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 140px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: var(--primary);
    z-index: 0;
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 36px;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-year {
    flex-shrink: 0;
    width: 120px;
    text-align: right;
    padding: 0 20px 0 0;
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 22px;
    background: #fff;
    position: relative;
    z-index: 2;
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: 133px;
    top: 4px;
    width: 14px;
    height: 14px;
    background: #fff;
    border: 3px solid var(--primary);
    border-radius: 50%;
    z-index: 2;
    box-sizing: border-box;
}

.timeline-content {
    flex: 1;
    padding-left: 40px;
}

.timeline-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.timeline-content p {
    font-size: 0.92rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== 业务板块 ===== */
/* 三二布局：第一行3个卡片，第二行2个卡片居中 */
.business-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
}

/* 前3个卡片各占2列 → 一行3个 */
.biz-card-1,
.biz-card-2,
.biz-card-3 {
    grid-column: span 2;
}

/* 后2个卡片各占3列 → 一行2个居中 */
.biz-card-4,
.biz-card-5 {
    grid-column: span 3;
}

.biz-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.biz-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    border-radius: 4px 4px 0 0;
    transition: var(--transition);
}

.biz-card-1::before { background: linear-gradient(90deg, #8B1A1A, #b93d3d); }
.biz-card-2::before { background: linear-gradient(90deg, #D4A44A, #e0b560); }
.biz-card-3::before { background: linear-gradient(90deg, #1e4d8c, #3b6cb6); }
.biz-card-4::before { background: linear-gradient(90deg, #6B4c1d, #8B6a3d); }
.biz-card-5::before { background: linear-gradient(90deg, #2d7a5f, #4a9b7a); }

.biz-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.biz-card:hover::before {
    height: 6px;
}

.biz-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.biz-num {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--bg-gray);
    line-height: 1;
}

.biz-info h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.biz-tag {
    font-size: 0.8rem;
    color: var(--primary);
    background: var(--primary-light);
    padding: 3px 12px;
    border-radius: 20px;
    font-weight: 500;
}

.biz-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    line-height: 1;
}

.biz-desc {
    font-size: 0.98rem;
    color: var(--text-body);
    line-height: 1.8;
    margin-bottom: 20px;
}

.biz-features {
    list-style: none;
}

.biz-features li {
    font-size: 0.9rem;
    color: var(--text-light);
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    border-top: 1px solid var(--bg-gray);
}

.biz-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 8px;
    color: var(--primary);
    font-weight: 700;
}

/* ===== 核心优势 ===== */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 60px;
}

.adv-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.adv-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.adv-icon-wrap {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: var(--primary-lighter);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.adv-card:hover .adv-icon-wrap {
    background: var(--primary-light);
    transform: scale(1.05);
}

.adv-icon {
    font-size: 2rem;
}

.adv-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.adv-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* 数据看板 */
.data-board {
    background: linear-gradient(135deg, #4a0c0c, #8B1A1A);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 20px;
}

.data-item {
    text-align: center;
    color: #fff;
    flex: 1;
    min-width: 120px;
}

.data-num {
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 8px;
}

.data-label {
    font-size: 0.88rem;
    opacity: 0.85;
}

.data-divider {
    width: 1px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
}

/* ===== 合作案例 ===== */
.cases-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 1.02rem;
    color: var(--text-body);
    line-height: 1.9;
}

.cases-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
}

.case-tag {
    padding: 10px 24px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--text-body);
    font-weight: 500;
    transition: var(--transition);
    cursor: default;
}

.case-tag:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 26, 26, 0.25);
}

.cases-note {
    text-align: center;
    margin-top: 30px;
    color: var(--text-light);
    font-size: 0.85rem;
}

/* ===== 新闻动态 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    margin-bottom: 40px;
}

.news-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

/* 顶部大图区域 */
.news-img {
    position: relative;
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, var(--primary-lighter) 0%, #f5e6e6 50%, var(--primary-light) 100%);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: inherit;
}

.news-img::before {
    content: '\1F4F0';
    position: absolute;
    font-size: 4rem;
    opacity: 0.25;
    transition: var(--transition);
}

.news-img::after {
    content: 'IMAGE';
    position: absolute;
    bottom: 12px;
    right: 16px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--primary);
    opacity: 0.45;
    background: rgba(255, 255, 255, 0.7);
    padding: 3px 10px;
    border-radius: 10px;
}

.news-card:hover .news-img::before {
    transform: scale(1.15);
    opacity: 0.4;
}

/* 真实图片接入样式：当 <img> 存在时覆盖占位背景 */
.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
    display: block;
}

.news-card:hover .news-img img {
    transform: scale(1.05);
}

/* 下方内容区：日期 + 正文 */
.news-content {
    padding: 24px 28px 28px;
    display: flex;
    gap: 20px;
    flex: 1;
}

.news-date {
    flex-shrink: 0;
    width: 64px;
    text-align: center;
    padding: 10px 8px;
    background: var(--primary-lighter);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: fit-content;
}

.news-day {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 4px;
}

.news-month {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 500;
}

.news-body {
    flex: 1;
}

.news-category {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--primary);
    background: var(--primary-light);
    padding: 3px 12px;
    border-radius: 20px;
    margin-bottom: 10px;
    font-weight: 600;
}

.news-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.5;
    transition: var(--transition);
}

.news-body a {
    text-decoration: none;
    color: inherit;
}

.news-card:hover .news-body h3 {
    color: var(--primary);
}

.news-body p {
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 12px;
}

.news-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
}

.news-link:hover {
    color: var(--primary-dark);
    padding-left: 4px;
}

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

/* ===== 团队介绍 ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.team-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.team-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-size: 2rem;
    font-weight: 900;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(139, 26, 26, 0.3);
}

.team-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.team-role {
    font-size: 0.88rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 20px;
}

.team-bio {
    list-style: none;
    text-align: left;
}

.team-bio li {
    font-size: 0.86rem;
    color: var(--text-light);
    padding: 7px 0;
    padding-left: 18px;
    position: relative;
    line-height: 1.5;
    border-top: 1px solid var(--bg-gray);
}

.team-bio li:first-child {
    border-top: none;
}

.team-bio li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

/* ===== 企业文化 ===== */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.culture-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 44px 32px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.culture-card:hover {
    box-shadow: var(--shadow-md);
}

.culture-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-light);
    padding: 6px 20px;
    border-radius: 30px;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.culture-card p {
    font-size: 1.1rem;
    color: var(--text-dark);
    font-weight: 500;
    line-height: 1.8;
}

/* ===== 常见问题 FAQ ===== */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item[open] {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.faq-item summary {
    list-style: none;
    cursor: pointer;
    padding: 22px 28px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-dark);
    position: relative;
    padding-right: 50px;
    transition: var(--transition);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--primary);
    font-weight: 300;
    transition: var(--transition);
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item[open] summary {
    color: var(--primary);
    background: var(--primary-lighter);
}

.faq-answer {
    padding: 0 28px 24px;
}

.faq-answer p {
    font-size: 0.95rem;
    color: var(--text-body);
    line-height: 1.8;
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

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

.contact-item {
    display: flex;
    gap: 18px;
    align-items: flex-start;
}

.contact-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--primary-lighter);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.contact-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.92rem;
    color: var(--text-light);
    line-height: 1.6;
}

.contact-item a {
    color: var(--primary);
    font-weight: 500;
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--primary-dark);
}

.contact-cta {
    height: 100%;
}

.cta-box {
    background: linear-gradient(135deg, #4a0c0c, #8B1A1A);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    color: #fff;
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.cta-box h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-box p {
    font-size: 0.95rem;
    opacity: 0.85;
    line-height: 1.8;
    margin-bottom: 24px;
}

.cta-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 32px;
}

.cta-tags span {
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    font-size: 0.82rem;
}

.cta-box .btn-primary {
    background: var(--accent);
    color: var(--text-dark);
    align-self: center;
    box-shadow: 0 4px 16px rgba(212, 164, 74, 0.3);
}

.cta-box .btn-primary:hover {
    background: #e0b560;
    transform: translateY(-2px);
}

/* ===== 页脚 ===== */
.footer {
    background: #1a0a0a;
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 30px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo-img {
    height: 40px;
    width: auto;
    max-width: 180px;
    object-fit: contain;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 2;
    opacity: 0.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    padding: 5px 0;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--accent);
    padding-left: 4px;
}

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

.footer-bottom p {
    font-size: 0.82rem;
    opacity: 0.5;
}

.footer-bottom a {
    color: inherit;
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* ===== 动画 ===== */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    /* 平板：业务板块改为二二一布局 */
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .biz-card-1,
    .biz-card-2,
    .biz-card-3,
    .biz-card-4,
    .biz-card-5 {
        grid-column: auto;
    }

    .biz-card-5 {
        grid-column: 1 / -1;
        max-width: calc(50% - 12px);
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 70px 0;
    }

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

    .nav-menu {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }

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

    .nav-menu ul {
        flex-direction: column;
        padding: 10px 24px;
        gap: 0;
    }

    .nav-menu li {
        border-bottom: 1px solid var(--border);
    }

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

    .nav-link {
        display: block;
        padding: 14px 0;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-desc {
        font-size: 0.92rem;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .stat-num {
        font-size: 2rem;
    }

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

    .biz-card-1,
    .biz-card-2,
    .biz-card-3,
    .biz-card-4,
    .biz-card-5 {
        grid-column: auto;
    }

    .biz-card-5 {
        max-width: none;
        margin: 0;
    }

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

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

    .data-board {
        flex-direction: column;
        gap: 24px;
    }

    .data-divider {
        display: none;
    }

    .timeline::before {
        left: 100px;
    }

    .timeline-year {
        width: 100px;
        font-size: 0.9rem;
        padding-right: 16px;
    }

    .timeline-item::after {
        left: 93px;
        width: 12px;
        height: 12px;
    }

    .timeline-content {
        padding-left: 30px;
    }

    .news-content {
        flex-direction: column;
        gap: 16px;
        padding: 20px;
    }

    .news-date {
        width: 100%;
        flex-direction: row;
        justify-content: center;
        gap: 8px;
        padding: 10px;
    }

    .news-day {
        margin-bottom: 0;
    }

    .news-img {
        height: 160px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

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

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

    .nav-logo-img {
        height: 38px;
    }
}