/* ============================================================
   全局样式 - 内蒙古新信科技官网
   ============================================================ */
:root {
    --primary: #1a56db;
    --primary-dark: #1e429f;
    --primary-light: #e8f0fe;
    --secondary: #ff6b35;
    --accent: #06b6d4;
    --dark: #0f172a;
    --dark2: #1e293b;
    --text: #334155;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --bg-blue: #eff6ff;
    --border: #e2e8f0;
    --white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-hover: 0 12px 40px rgba(26,86,219,0.18);
    --radius: 10px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    background: var(--white);
}

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-padding { padding: 90px 0; }
.bg-light { background: var(--bg-light); }
.text-center { text-align: center; }
.mt-5 { margin-top: 40px; }

/* ===== 章节标题 ===== */
.section-title { margin-bottom: 55px; }
.section-title h2 {
    font-size: 34px;
    color: var(--dark);
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.section-title h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    margin: 14px auto 0;
    border-radius: 2px;
}
.section-title.text-left h2::after { margin-left: 0; }
.section-title p { color: var(--text-light); font-size: 16px; margin-top: 10px; }

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
    padding: 0;
}
.navbar.scrolled {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 24px rgba(0,0,0,0.1);
}
/* 滚动后文字颜色切换 */
.navbar.scrolled .nav-toggle span { background: var(--dark); }

/* 内层：三列布局 左=LOGO 中=菜单 右=空白 */
.nav-inner {
    display: flex;
    align-items: stretch;
    height: 68px;
}

/* ---- 左区：LOGO + 名称 ---- */
.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    padding: 0 100px 0 0;
    flex-shrink: 0;
    min-width: 0;
}
.nav-brand-logo {
    height: 40px;
    width: 40px;
    object-fit: contain;
    border-radius: 6px;
    flex-shrink: 0;
}
.nav-brand-text {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
    line-height: 1.3;
    letter-spacing: 0.3px;
    transition: color 0.3s;
}
.navbar.scrolled .nav-brand-text { color: var(--primary); }

/* ---- 中区：导航菜单（flex:1 居中） ---- */
.nav-menu {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
}
.nav-menu a {
    color: rgba(255,255,255,0.92);
    font-size: 15px;
    padding: 8px 16px;
    border-radius: var(--radius);
    transition: var(--transition);
    font-weight: 500;
    white-space: nowrap;
    text-decoration: none;
}
.nav-menu a:hover,
.nav-menu a.active {
    background: var(--primary);
    color: #fff;
}
.navbar.scrolled .nav-menu a { color: var(--dark2); }
.navbar.scrolled .nav-menu a:hover,
.navbar.scrolled .nav-menu a.active { background: var(--primary); color: #fff; }

/* ---- 汉堡按钮（移动端） ---- */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    padding: 5px 0 5px 16px;
    flex-shrink: 0;
}
.nav-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}
.navbar.scrolled .nav-toggle span { background: var(--dark); }

/* ---- 移动端响应 ---- */
@media (max-width: 900px) {
    .nav-inner { height: 60px; flex-wrap: wrap; position: relative; }
    .nav-brand { flex: 1; padding-right: 10px; }
    .nav-toggle { display: flex; margin-left: auto; }
    .nav-menu {
        display: none;
        flex-direction: column;
        align-items: stretch;
        position: absolute;
        top: 60px; left: 0; right: 0;
        background: #fff;
        padding: 12px 16px 16px;
        box-shadow: 0 8px 24px rgba(0,0,0,0.12);
        border-top: 2px solid var(--primary);
        z-index: 999;
        gap: 2px;
    }
    .nav-menu.open { display: flex; }
    .nav-menu a { color: var(--dark2); padding: 10px 14px; border-radius: 8px; }
    .nav-menu a:hover, .nav-menu a.active { background: var(--primary); color: #fff; }
}

/* ===== 轮播图 ===== */
.hero-slider {
    position: relative;
    height: 100vh;
    min-height: 620px;
    overflow: hidden;
}
.slider-item {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease;
}
.slider-item.active { opacity: 1; }
.slider-item img {
    width: 100%; height: 100%;
    object-fit: cover;
}
.slider-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,23,42,0.7) 0%, rgba(26,86,219,0.4) 100%);
}
.slider-content {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 24px;
    padding-top: 80px;
}
.slider-content h2 {
    font-size: 54px;
    color: var(--white);
    font-weight: 800;
    margin-bottom: 20px;
    text-shadow: 0 2px 16px rgba(0,0,0,0.3);
    line-height: 1.2;
    letter-spacing: -1px;
}
.slider-content p {
    font-size: 20px;
    color: rgba(255,255,255,0.88);
    margin-bottom: 40px;
    max-width: 600px;
    line-height: 1.6;
}
.slider-content .btn-group { display: flex; gap: 15px; flex-wrap: wrap; justify-content: center; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    letter-spacing: 0.3px;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 20px rgba(26,86,219,0.35);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(26,86,219,0.45);
    color: var(--white);
}
.btn-outline {
    background: rgba(255,255,255,0.12);
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.7);
    backdrop-filter: blur(4px);
}
.btn-outline:hover {
    background: var(--white);
    color: var(--primary);
    border-color: var(--white);
}
.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), #e55a1e);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(255,107,53,0.35);
}
.btn-secondary:hover { transform: translateY(-2px); color: var(--white); box-shadow: 0 8px 30px rgba(255,107,53,0.45); }
.btn-sm { padding: 7px 16px; font-size: 13px; border-radius: 6px; }
.btn-success { background: linear-gradient(135deg,#22c55e,#16a34a); color: var(--white); }
.btn-warning { background: linear-gradient(135deg,#f59e0b,#d97706); color: var(--white); }

/* 轮播控制 */
.slider-dots {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 10px;
}
.slider-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.45);
    cursor: pointer;
    transition: var(--transition);
}
.slider-dot.active {
    background: var(--white);
    width: 24px;
    border-radius: 4px;
}
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 48px; height: 48px;
    background: rgba(255,255,255,0.15);
    border: 1.5px solid rgba(255,255,255,0.45);
    border-radius: 50%;
    color: var(--white);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    backdrop-filter: blur(8px);
}
.slider-arrow:hover { background: var(--primary); border-color: var(--primary); }
.slider-arrow.prev { left: 24px; }
.slider-arrow.next { right: 24px; }

/* ===== 数字统计 ===== */
.stats-bar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 50px 0;
    color: var(--white);
    position: relative;
    overflow: hidden;
}
.stats-bar::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px; height: 500px;
    background: rgba(255,255,255,0.04);
    border-radius: 50%;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
    position: relative;
    z-index: 1;
}
.stat-item { padding: 10px 0; }
.stat-item h3 { font-size: 50px; font-weight: 800; line-height: 1; letter-spacing: -1px; }
.stat-item h3 span { font-size: 22px; }
.stat-item p { font-size: 15px; opacity: 0.82; margin-top: 10px; letter-spacing: 1px; }

/* ===== 关于我们 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
}
.about-images {
    position: relative;
    height: 460px;
}
.about-img-main {
    position: absolute;
    top: 0; left: 0;
    width: 72%;
    height: 78%;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}
.about-img-sub {
    position: absolute;
    bottom: 0; right: 0;
    width: 52%;
    height: 52%;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 6px solid var(--white);
}
.about-badge {
    position: absolute;
    top: 28px; right: -15px;
    background: linear-gradient(135deg, var(--secondary), #e55a1e);
    color: var(--white);
    padding: 18px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    z-index: 2;
}
.about-badge strong { display: block; font-size: 38px; font-weight: 800; line-height: 1; }
.about-badge span { font-size: 13px; opacity: 0.9; }
.about-features { margin-top: 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-blue);
    border-radius: var(--radius);
    border-left: 3px solid var(--primary);
    transition: var(--transition);
}
.feature-item:hover { background: var(--primary-light); transform: translateX(4px); }
.feature-item i { color: var(--primary); font-size: 16px; }
.feature-item span { font-size: 14px; font-weight: 500; color: var(--dark2); }
.about-text p { color: var(--text-light); line-height: 1.9; margin-bottom: 15px; font-size: 15px; }

/* ===== 服务/产品 ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
    position: relative;
    display: flex;
    flex-direction: column;
}
.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(26,86,219,0.3);
}
.service-img {
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, #1a2035, #1e3a5f);
    flex-shrink: 0;
}
.service-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease;
    display: block;
}
.service-card:hover .service-img img { transform: scale(1.08); }
.service-icon {
    width: 52px; height: 52px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    margin: -26px 22px 0;
    position: relative;
    z-index: 1;
    box-shadow: 0 6px 20px rgba(26,86,219,0.4);
    flex-shrink: 0;
}
.service-body { padding: 16px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.service-body h3 {
    font-size: 16px;
    color: var(--dark);
    margin-bottom: 10px;
    margin-top: 10px;
    font-weight: 700;
    line-height: 1.4;
}
.service-body p { color: var(--text-light); font-size: 13.5px; line-height: 1.8; flex: 1; }
.service-more {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--primary);
    font-size: 13.5px;
    font-weight: 600;
    margin-top: 14px;
    transition: var(--transition);
}
.service-more:hover { gap: 10px; color: var(--primary-dark); }

/* ===== 案例展示 ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    background: var(--dark2);
    cursor: pointer;
}
.case-card .case-img-wrap {
    height: 220px;
    overflow: hidden;
    background: #0f172a;
}
.case-card .case-img-wrap img {
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.6s ease;
    display: block;
}
.case-card:hover .case-img-wrap img { transform: scale(1.1); }
.case-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(to top, rgba(10,18,40,0.96) 0%, rgba(10,18,40,0.5) 60%, transparent 100%);
    padding: 50px 20px 18px;
    transition: var(--transition);
}
.case-overlay h3 { color: var(--white); font-size: 15px; margin-bottom: 6px; font-weight: 600; line-height: 1.4; }
.case-overlay span {
    color: rgba(255,255,255,0.8);
    font-size: 11px;
    background: rgba(26,86,219,0.7);
    padding: 3px 10px;
    border-radius: 20px;
    display: inline-block;
    letter-spacing: 0.3px;
}
.case-overlay .view-btn {
    display: block;
    margin-top: 12px;
    background: var(--primary);
    color: var(--white);
    padding: 7px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-align: center;
    opacity: 0;
    transform: translateY(8px);
    transition: var(--transition);
    width: fit-content;
}
.case-card:hover .view-btn { opacity: 1; transform: translateY(0); }

/* ===== 新闻 ===== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.news-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(26,86,219,0.2); }
.news-img {
    height: 200px;
    overflow: hidden;
    background: var(--bg-light);
    flex-shrink: 0;
}
.news-img img {
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease;
    display: block;
}
.news-card:hover .news-img img { transform: scale(1.07); }
.news-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.news-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.news-date { font-size: 12px; color: var(--text-light); display: flex; align-items: center; gap: 5px; }
.news-category {
    font-size: 11px;
    color: var(--primary);
    background: var(--primary-light);
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 600;
}
.news-body h3 { font-size: 15px; color: var(--dark); margin-bottom: 8px; line-height: 1.6; font-weight: 600; }
.news-body h3 a { color: inherit; }
.news-body h3 a:hover { color: var(--primary); }
.news-body p { color: var(--text-light); font-size: 13px; line-height: 1.75; flex: 1; }

/* ===== 荣誉资质 ===== */
.honor-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}
.honor-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.honor-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: rgba(26,86,219,0.2); }
.honor-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.4s ease;
}
.honor-card:hover img { transform: scale(1.06); }

/* ===== 合作伙伴 ===== */
@keyframes partners-scroll {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
.partners-track {
    display: flex;
    gap: 20px;
    padding: 10px 0;
    width: max-content;
    animation: partners-scroll 30s linear infinite;
}
.partners-track:hover { animation-play-state: paused; }
.partner-item {
    flex-shrink: 0;
    width: 140px;
    height: 88px;
    overflow: hidden;
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
    filter: grayscale(50%);
}
.partner-item:hover { filter: none; box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(26,86,219,0.25); }
.partner-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.4s ease;
}
.partner-item:hover img { transform: scale(1.06); }

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 50px;
    align-items: start;
}
.contact-info-items { margin-top: 30px; display: flex; flex-direction: column; gap: 18px; }
.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.contact-info-item:hover { box-shadow: var(--shadow); border-color: rgba(26,86,219,0.2); }
.contact-icon {
    width: 46px; height: 46px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 18px;
    flex-shrink: 0;
}
.contact-info-item h4 { font-size: 13px; color: var(--text-light); margin-bottom: 4px; }
.contact-info-item p { font-size: 15px; color: var(--dark); font-weight: 600; }
.contact-form-box {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}
.contact-form-box h3 { font-size: 22px; color: var(--dark); margin-bottom: 28px; font-weight: 700; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; color: var(--dark); margin-bottom: 8px; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-size: 15px;
    font-family: inherit;
    color: var(--text);
    background: var(--bg-light);
    transition: var(--transition);
    outline: none;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(26,86,219,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ===== 页脚 ===== */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.75);
    padding: 65px 0 0;
    position: relative;
    overflow: hidden;
}
.footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 45px;
    padding-bottom: 45px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo-text {
    font-size: 17px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.footer-brand p { font-size: 14px; line-height: 1.85; opacity: 0.65; }
.footer-social { display: flex; gap: 10px; margin-top: 22px; }
.footer-social a {
    width: 36px; height: 36px;
    background: rgba(255,255,255,0.08);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    font-size: 15px;
    transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: var(--white); }
.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 28px; height: 2px;
    background: var(--primary);
    border-radius: 1px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
    color: rgba(255,255,255,0.6);
    font-size: 14px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 14px;
}
.footer-contact-item i { color: var(--primary); margin-top: 3px; flex-shrink: 0; }
.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--primary); }

/* ===== 面包屑 ===== */
.page-header {
    background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
    padding: 110px 0 55px;
    color: var(--white);
    position: relative;
    overflow: hidden;
}
.page-header::after {
    content: '';
    position: absolute;
    bottom: -1px; left: 0; right: 0;
    height: 60px;
    background: var(--white);
    clip-path: ellipse(55% 100% at 50% 100%);
}
.page-header h1 { font-size: 38px; font-weight: 800; margin-bottom: 14px; letter-spacing: -0.5px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 14px; opacity: 0.75; }
.breadcrumb a { color: rgba(255,255,255,0.8); }
.breadcrumb span { color: rgba(255,255,255,0.5); }

/* ===== 通知提示 ===== */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* ===== 加载动画 ===== */
.fade-in { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 滚动到顶部 ===== */
.scroll-top {
    position: fixed;
    bottom: 32px; right: 32px;
    width: 46px; height: 46px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(26,86,219,0.4);
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    border: none;
    font-size: 16px;
}
.scroll-top.show { opacity: 1; transform: translateY(0); }
.scroll-top:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(26,86,219,0.5); }

/* ===== 内容页 ===== */
.content-layout { display: grid; grid-template-columns: 3fr 1fr; gap: 40px; }
.article-content img { max-width: 100%; border-radius: var(--radius); margin: 15px 0; }
.article-content p { margin-bottom: 15px; line-height: 1.9; color: var(--text); }
.article-content h2, .article-content h3 { color: var(--dark); margin: 25px 0 15px; }
.sidebar .widget {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 25px;
    box-shadow: var(--shadow);
    margin-bottom: 25px;
    border: 1px solid var(--border);
}
.sidebar .widget h4 { font-size: 16px; color: var(--dark); margin-bottom: 15px; padding-bottom: 12px; border-bottom: 2px solid var(--primary); }
.sidebar-news-item { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.sidebar-news-item:last-child { border-bottom: none; }
.sidebar-news-item img { width: 60px; height: 60px; object-fit: cover; border-radius: 8px; flex-shrink: 0; }
.sidebar-news-item .title { font-size: 13px; color: var(--dark); line-height: 1.5; }
.sidebar-news-item .title:hover { color: var(--primary); }
.sidebar-news-item .date { font-size: 12px; color: var(--text-light); margin-top: 5px; }

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .honor-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
    .slider-content h2 { font-size: 30px; }
    .slider-content p { font-size: 16px; }
    .about-grid { grid-template-columns: 1fr; }
    .about-images { height: 300px; }
    .services-grid { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    .section-padding { padding: 55px 0; }
    .section-title h2 { font-size: 26px; }
    .contact-form-box { padding: 24px; }
    .about-features { grid-template-columns: 1fr; }
    .stat-item h3 { font-size: 36px; }
    .honor-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-bottom { flex-direction: column; gap: 8px; }
}