/* ===== keji 科技商务风主题 ===== */
/* 高端科技商务设计 — 深蓝渐变 · 精致阴影 · 微光质感 */

/* ===== 基础重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: #1a1a2e; background: #fff; font-size: 14px;
    -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul, li { list-style: none; }

/* ===== 配色变量 ===== */
:root {
    --keji-primary: #2563eb;
    --keji-primary-dark: #1e40af;
    --keji-primary-light: #3b82f6;
    --keji-deep: #1e3a8a;
    --keji-deep-gradient: linear-gradient(115deg, #14276b 0%, #1e3a8a 45%, #2563eb 100%);
    --keji-text: #1a1a2e;
    --keji-text-secondary: #4a5568;
    --keji-text-light: #8896ab;
    --keji-border: #e8ecf1;
    --keji-bg-alt: #f7f9fc;
    --keji-shadow-sm: 0 2px 8px rgba(15,22,53,0.06);
    --keji-shadow-md: 0 8px 30px rgba(15,22,53,0.08);
    --keji-shadow-lg: 0 20px 60px rgba(15,22,53,0.12);
    --keji-shadow-blue: 0 8px 32px rgba(37,99,235,0.25);
    --keji-radius: 12px;
    --keji-radius-lg: 16px;
    --keji-transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 通用容器 ===== */
.keji-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.keji-section { padding: 90px 0; }
.keji-section-title {
    font-size: 32px; color: var(--keji-text); text-align: center;
    letter-spacing: 1px; font-weight: 700; position: relative;
    padding-bottom: 20px; margin-bottom: 0;
}
/* 标题下方装饰线 */
.keji-section-title::after {
    content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
    width: 48px; height: 3px; border-radius: 2px;
    background: linear-gradient(90deg, var(--keji-primary), var(--keji-primary-light));
}
.keji-section-desc {
    font-size: 16px; color: var(--keji-text-light); text-align: center;
    margin-top: 16px; margin-bottom: 56px; letter-spacing: 0.5px; font-weight: 300;
}
.keji-section-desc.en { font-size: 13px; color: #b0bcc8; letter-spacing: 3px; text-transform: uppercase; }

/* ===== Header 导航（毛玻璃 + 滚动变色） ===== */
.keji-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(255,255,255,0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    height: 72px;
    box-shadow: 0 1px 0 rgba(15,22,53,0.06);
    transition: var(--keji-transition);
}
/* 首页：透明背景，融入深蓝 banner，白色文字 */
.keji-header-home {
    background: transparent;
    backdrop-filter: none; -webkit-backdrop-filter: none;
    box-shadow: none;
}
.keji-header-home .keji-logo { color: #fff; }
.keji-header-home .keji-nav a { color: rgba(255,255,255,0.8); }
.keji-header-home .keji-nav a:hover, .keji-header-home .keji-nav a.active { color: #fff; }
.keji-header-home .keji-nav-cta {
    background: rgba(255,255,255,0.12); color: #fff !important;
    border: 1px solid rgba(255,255,255,0.25);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.keji-header-home .keji-nav-cta:hover {
    background: rgba(255,255,255,0.2);
    box-shadow: 0 4px 16px rgba(255,255,255,0.15);
}
.keji-header-home .keji-nav-toggle span { background: #fff; }

.keji-header-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 20px;
    height: 72px;
    display: flex; align-items: center; justify-content: space-between;
}
.keji-logo {
    font-size: 22px; font-weight: 800;
    letter-spacing: 1px;
    display: flex; align-items: center; gap: 10px;
}
/* 金色渐变文字（白底：深金保证可读） */
.keji-logo span {
    background: linear-gradient(135deg, #8b6914 0%, #b8860b 35%, #d4af37 60%, #9a7318 100%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
}
.keji-logo-icon {
    width: 30px; height: 30px; flex-shrink: 0;
    filter: drop-shadow(0 2px 6px rgba(212,175,55,0.35));
}
/* 首页深蓝底：亮金 */
.keji-header-home .keji-logo span {
    background: linear-gradient(135deg, #f5d76e 0%, #eed188 40%, #d4af37 75%, #f9e8b5 100%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
}
.keji-header-home .keji-logo-icon {
    filter: drop-shadow(0 2px 8px rgba(245,215,110,0.35));
}
.keji-nav { display: flex; gap: 36px; align-items: center; }
.keji-nav a {
    color: var(--keji-text); font-size: 15px; height: 72px; line-height: 72px;
    transition: color 0.2s; font-weight: 500;
}
.keji-nav a:hover, .keji-nav a.active { color: var(--keji-primary); }
.keji-nav-cta {
    background: var(--keji-primary); color: #fff !important;
    padding: 0 24px; border-radius: 22px; font-weight: 600;
    height: 38px; line-height: 38px !important;
    font-size: 14px;
    transition: var(--keji-transition);
}
.keji-nav-cta:hover {
    background: var(--keji-primary-dark);
    box-shadow: var(--keji-shadow-blue);
    transform: translateY(-1px);
}
.keji-nav-toggle {
    display: none; background: none; border: none; cursor: pointer;
    flex-direction: column; gap: 5px;
}
.keji-nav-toggle span {
    width: 24px; height: 3px; background: var(--keji-text); border-radius: 2px;
    transition: 0.3s;
}

/* ===== 1. Banner（深蓝渐变 + 光效 + 文字阴影） ===== */
.keji-banner {
    background: var(--keji-deep-gradient);
    min-height: 680px;
    display: flex; align-items: center;
    padding: 120px 20px 80px;
    position: relative;
    overflow: hidden;
}
/* 背景图叠加（新图自带渐变+网格+粒子，完整显示） */
.keji-banner::before {
    content: ''; position: absolute; inset: 0;
    background: url('../img/banner-bg.jpg') no-repeat 50%;
    background-size: cover; opacity: 1;
    --banner-mx: 0px; --banner-my: 0px; --banner-scroll: 0px;
    transform: translate(var(--banner-mx), calc(var(--banner-my) + var(--banner-scroll)));
}
/* 右侧光效 */
.keji-banner::after {
    content: ''; position: absolute; top: -200px; right: -200px;
    width: 600px; height: 600px; border-radius: 50%;
    background: radial-gradient(circle, rgba(37,99,235,0.25) 0%, transparent 70%);
    pointer-events: none;
}
.keji-banner-inner { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; width: 100%; }
/* Banner 右侧二维码展示 */
.keji-banner-qrs {
    position: absolute; right: 0; top: 50%; transform: translateY(-60%);
    display: flex; gap: 24px;
}
.keji-banner-qr {
    display: flex; flex-direction: column; align-items: center; gap: 10px;
    background: rgba(255,255,255,0.1); backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2); border-radius: 16px;
    padding: 16px; transition: var(--keji-transition);
}
.keji-banner-qr:hover {
    background: rgba(255,255,255,0.16);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.keji-banner-qr img {
    width: 128px; height: 128px; object-fit: contain;
    border-radius: 10px; background: #fff; padding: 6px;
}
.keji-banner-qr span { color: rgba(255,255,255,0.9); font-size: 13px; letter-spacing: 1px; }
.keji-banner-title {
    font-size: 44px; color: #fff; font-weight: 800;
    margin-bottom: 24px; line-height: 1.25; letter-spacing: 2px;
    max-width: 600px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.keji-banner-desc {
    font-size: 18px; color: rgba(255,255,255,0.7);
    margin-bottom: 48px; line-height: 1.8;
    max-width: 560px; font-weight: 300;
}
.keji-banner-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--keji-primary), var(--keji-primary-light));
    color: #fff;
    font-size: 16px; font-weight: 600;
    width: 225px; height: 52px; line-height: 52px;
    text-align: center; border-radius: 26px;
    letter-spacing: 4px; border: 0;
    transition: var(--keji-transition);
    box-shadow: var(--keji-shadow-blue);
}
.keji-banner-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(37,99,235,0.4);
}

/* ===== 2. 服务图标网格 ===== */
.keji-services-grid { background: #fff; padding-bottom: 30px; }
.keji-icon-item {
    text-align: center; width: 120px;
    transition: var(--keji-transition);
    padding: 16px 8px; border-radius: var(--keji-radius);
}
.keji-icon-item:hover { transform: translateY(-4px); background: var(--keji-bg-alt); }
.keji-icon-img {
    width: 50px; height: 50px; margin: 0 auto 10px;
}
.keji-icon-img img { width: 100%; height: 100%; display: block; }
.keji-icon-item span { font-size: 14px; color: var(--keji-text-secondary); font-weight: 500; }

/* ===== 3. 服务能力卡片 ===== */
.keji-services-list { background: var(--keji-bg-alt); }
.keji-service-cards {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.keji-service-card {
    background: #fff; border: 1px solid var(--keji-border);
    border-radius: var(--keji-radius); padding: 40px 30px;
    text-align: center;
    transition: var(--keji-transition);
    box-shadow: var(--keji-shadow-sm);
}
.keji-service-card:hover {
    border-color: var(--keji-primary);
    box-shadow: var(--keji-shadow-md);
    transform: translateY(-6px);
}
.keji-service-card-highlight {
    border-color: var(--keji-primary);
    background: linear-gradient(135deg, var(--keji-primary) 0%, var(--keji-primary-light) 100%);
    color: #fff;
    box-shadow: var(--keji-shadow-blue);
}
.keji-service-card-highlight h3, .keji-service-card-highlight p { color: #fff; }
.keji-service-icon { font-size: 36px; margin-bottom: 20px; }
.keji-service-card h3 { font-size: 18px; color: var(--keji-text); margin-bottom: 12px; font-weight: 600; }
.keji-service-card p { font-size: 13px; color: var(--keji-text-light); line-height: 1.7; }

/* ===== 4. 交付流程（横向时间线） ===== */
.keji-process { background: var(--keji-bg-alt); }

/* ===== 5. 案例展示 ===== */
.keji-case-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.keji-case-card {
    background: #fff; border-radius: var(--keji-radius); overflow: hidden;
    box-shadow: var(--keji-shadow-sm);
    transition: var(--keji-transition);
}
.keji-case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--keji-shadow-lg);
}
.keji-case-card img { width: 100%; height: 220px; object-fit: cover; transition: transform 0.4s; }
.keji-case-card:hover img { transform: scale(1.05); }
.keji-case-info { padding: 24px; }
.keji-case-info h3 { font-size: 18px; color: var(--keji-text); margin-bottom: 8px; font-weight: 600; }
.keji-case-info p { font-size: 14px; color: var(--keji-text-light); }
.keji-more-link { text-align: center; margin-top: 50px; }
.keji-more-link a {
    display: inline-block; padding: 12px 40px;
    border: 2px solid var(--keji-primary); border-radius: 26px;
    color: var(--keji-primary); font-size: 16px; font-weight: 600;
    transition: var(--keji-transition);
}
.keji-more-link a:hover {
    background: var(--keji-primary); color: #fff;
    box-shadow: var(--keji-shadow-blue);
}

/* ===== 6. 售后保障 ===== */
.keji-guarantee { background: #fff; }
.keji-guarantee-list {
    display: grid; grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}
.keji-guarantee-item {
    text-align: center; padding: 40px 20px;
    background: var(--keji-bg-alt); border-radius: var(--keji-radius);
    transition: var(--keji-transition);
    border: 1px solid transparent;
}
.keji-guarantee-item:hover {
    background: #fff;
    box-shadow: var(--keji-shadow-md);
    transform: translateY(-6px);
    border-color: var(--keji-border);
}
.keji-guarantee-icon { font-size: 36px; margin-bottom: 16px; }
.keji-guarantee-item h3 { font-size: 16px; color: var(--keji-text); font-weight: 600; }

/* ===== 7. 技术洞察 ===== */
.keji-insights { background: var(--keji-bg-alt); }
.keji-insight-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.keji-insight-card {
    background: #fff; border-radius: var(--keji-radius); padding: 30px;
    transition: var(--keji-transition);
    box-shadow: var(--keji-shadow-sm);
}
.keji-insight-card:hover {
    box-shadow: var(--keji-shadow-md);
    transform: translateY(-4px);
}
.keji-insight-card h3 { font-size: 18px; color: var(--keji-text); margin-bottom: 12px; font-weight: 600; line-height: 1.5; }
.keji-insight-card p { font-size: 14px; color: var(--keji-text-light); line-height: 1.7; margin-bottom: 16px; }
.keji-insight-date { font-size: 13px; color: #b0bcc8; }

/* ===== 8. 咨询表单 CTA（深蓝渐变 + 光效） ===== */
.keji-contact-cta {
    background: var(--keji-deep-gradient);
    color: #fff;
    position: relative;
    overflow: hidden;
}
/* CTA 区光效 */
.keji-contact-cta::before {
    content: ''; position: absolute; top: -100px; left: -100px;
    width: 400px; height: 400px; border-radius: 50%;
    background: radial-gradient(circle, rgba(37,99,235,0.2) 0%, transparent 70%);
    pointer-events: none;
}
.keji-contact-cta .keji-section-title { color: #fff; }
.keji-contact-cta .keji-section-title::after { background: linear-gradient(90deg, #60a5fa, #93c5fd); }
.keji-contact-cta .keji-section-desc { color: rgba(255,255,255,0.6); }
.keji-contact-form {
    max-width: 590px; margin: 0 auto; position: relative; z-index: 1;
    display: flex; flex-direction: column; gap: 16px;
}
.keji-contact-form input,
.keji-contact-form textarea {
    width: 100%; padding: 14px 20px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--keji-radius); font-size: 16px;
    background: rgba(255,255,255,0.08); color: #fff;
    transition: var(--keji-transition);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.keji-contact-form input::placeholder,
.keji-contact-form textarea::placeholder { color: rgba(255,255,255,0.4); }
.keji-contact-form input:focus,
.keji-contact-form textarea:focus {
    border-color: var(--keji-primary-light); outline: none;
    background: rgba(255,255,255,0.12);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
.keji-contact-form button {
    padding: 16px 40px;
    background: linear-gradient(135deg, var(--keji-primary), var(--keji-primary-light));
    color: #fff;
    border: 0; border-radius: 26px; font-size: 18px; font-weight: 600;
    cursor: pointer; transition: var(--keji-transition);
    letter-spacing: 4px;
    box-shadow: var(--keji-shadow-blue);
}
.keji-contact-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(37,99,235,0.4);
}

/* ===== Footer（深色渐变背景） ===== */
.keji-footer { background: linear-gradient(180deg, #1a1a2e 0%, #0f0f1e 100%); width: 100%; }
.keji-footer-con {
    width: 1200px; margin: 0 auto;
    overflow: hidden;
}
.keji-footer-ul {
    float: left; margin-top: 60px;
    list-style: none; padding: 0;
}
/* 第1列：联系方式 */
.keji-footer-ul1 {
    position: relative; width: 400px;
}
.keji-footer-ul1::after {
    content: ''; position: absolute;
    left: 415px; top: 0;
    width: 1px; height: 350px;
    background: linear-gradient(180deg, transparent, rgba(255,255,255,0.1), transparent);
}
.keji-footer-ul1 .keji-footer-font20 {
    height: 60px; font-size: 22px; color: #fff; font-weight: 700; letter-spacing: 1px;
}
.keji-footer-ul1 .keji-footer-font20 a { color: #fff; }
.keji-footer-brand {
    display: inline-flex; align-items: center; gap: 10px;
}
.keji-footer-brand .keji-logo-icon { width: 26px; height: 26px; }
.keji-footer-ul1 .keji-footer-font14 {
    height: 35px; font-size: 14px; color: rgba(255,255,255,0.6);
}
/* 第2列：首页 */
.keji-footer-ul2 {
    margin-left: 110px; width: 112px;
}
/* 第3-6列 */
.keji-footer-ul3,
.keji-footer-ul4,
.keji-footer-ul5 {
    margin: 60px 30px 0;
}
.keji-footer-ul6 {
    margin: 60px 30px 0 30px;
}
/* 标题 */
.keji-footer-font16 {
    color: #fff; height: 47px; font-size: 15px; font-weight: 600; letter-spacing: 0.5px;
}
.keji-footer-font16 a { color: #fff; }
/* 链接 */
.keji-footer-font14 {
    height: 40px; font-size: 14px; color: rgba(255,255,255,0.5);
}
.keji-footer-font14 a {
    color: rgba(255,255,255,0.5); transition: color 0.2s;
}
.keji-footer-font14 a:hover { color: #fff; }
/* 底部版权栏 */
.keji-footer-but {
    border-top: 1px solid rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.35); height: 80px; line-height: 80px;
    text-align: center; font-size: 12px;
    width: 1200px; margin: 0 auto;
}
.keji-footer-but a { color: rgba(255,255,255,0.35); }
.keji-footer-but a:hover { color: rgba(255,255,255,0.6); }

/* ===== SVG 图标 ===== */
.keji-svg-icon {
    width: 20px; height: 20px;
    vertical-align: middle;
    margin-right: 8px;
    fill: currentColor;
    flex-shrink: 0;
}
.keji-svg-lg { width: 40px; height: 40px; margin-right: 0; }
.keji-guarantee-icon .keji-svg-icon,
.keji-culture-icon .keji-svg-icon {
    width: 36px; height: 36px; margin-right: 0;
    color: var(--keji-primary);
}

/* ===== 悬浮咨询按钮 ===== */
.keji-float-btn {
    position: fixed; right: 20px; bottom: 40px; z-index: 99;
    display: flex; flex-direction: column; gap: 12px;
}
.keji-float-item {
    width: 56px; height: 56px; border-radius: 50%;
    background: linear-gradient(135deg, var(--keji-primary), var(--keji-primary-light));
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; cursor: pointer;
    box-shadow: var(--keji-shadow-blue);
    transition: var(--keji-transition);
}
.keji-float-item:hover { transform: scale(1.1); box-shadow: 0 8px 32px rgba(37,99,235,0.4); }
.keji-float-toggle-active { background: linear-gradient(135deg, var(--keji-gold), #d4a017) !important; }

/* ===== 悬浮联系小窗 ===== */
.keji-float-panel { position: fixed; right: 20px; bottom: 120px; z-index: 100; pointer-events: none; }
.keji-float-contact {
    position: absolute; right: 0; bottom: 0; width: 240px;
    background: #fff; border-radius: 16px;
    box-shadow: 0 12px 48px rgba(15,23,42,0.18);
    opacity: 0; transform: translateY(20px) scale(0.9); pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    overflow: hidden;
}
.keji-float-contact-open { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.keji-float-contact-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 16px; background: linear-gradient(135deg, var(--keji-primary), var(--keji-primary-light));
    color: #fff; font-size: 15px; font-weight: 600;
}
.keji-float-contact-close {
    background: rgba(255,255,255,0.2); border: none; color: #fff;
    width: 24px; height: 24px; border-radius: 50%; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: background 0.2s;
}
.keji-float-contact-close:hover { background: rgba(255,255,255,0.35); }
.keji-float-contact-body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.keji-float-contact-phone {
    display: flex; align-items: center; gap: 8px;
    color: var(--keji-primary); font-size: 16px; font-weight: 600;
    text-decoration: none; padding: 8px 12px; border-radius: 8px;
    background: #f0f5ff; transition: background 0.2s;
}
.keji-float-contact-phone:hover { background: #e0eaff; }
.keji-float-qr {
    display: flex; flex-direction: column; align-items: center;
    padding: 8px 0;
    border-top: 1px solid #f0f0f0;
}
.keji-float-qr:first-child { border-top: none; padding-top: 0; }
.keji-float-qr img {
    width: 140px; height: 140px; object-fit: contain;
    border-radius: 8px; border: 1px solid #eee;
    display: block;
}
.keji-float-qr p { margin: 6px 0 0; font-size: 13px; color: #64748b; }
.keji-float-contact-tip { font-size: 13px; color: #94a3b8; text-align: center; margin: 0; padding: 8px 0; }
.keji-float-contact-btn {
    display: block; text-align: center; text-decoration: none;
    padding: 10px; border-radius: 8px; font-size: 14px; font-weight: 500;
    background: linear-gradient(135deg, var(--keji-primary), var(--keji-primary-light));
    color: #fff; transition: opacity 0.2s;
}
.keji-float-contact-btn:hover { opacity: 0.9; }

/* 默认封面图（logo 居中，无背景） */
.keji-img-fallback { object-fit: contain !important; background: #f8fafc; }

/* ===== 内页标题区（简洁浅色） ===== */
.keji-page-header {
    padding: 120px 20px 48px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    text-align: center;
    border-bottom: 1px solid var(--keji-border);
}
.keji-page-header h1 {
    font-size: 30px; color: var(--keji-text); font-weight: 800;
    margin-bottom: 12px; letter-spacing: 1px;
}
.keji-page-header p {
    font-size: 16px; color: var(--keji-text-light);
    font-weight: 300; max-width: 600px; margin: 0 auto;
    line-height: 1.6;
}
.keji-page-header::after {
    content: ''; display: block; width: 48px; height: 3px;
    background: linear-gradient(90deg, var(--keji-primary), var(--keji-primary-light));
    border-radius: 2px; margin: 20px auto 0;
}

/* ===== 案例列表页 ===== */
.keji-pro-sec { padding: 0 0 78px; }
.keji-pro-sec-h2 {
    display: flex; align-items: center;
    margin: 40px 0 25px;
}
.keji-pro-title {
    color: var(--keji-text); font-size: 30px; font-weight: 700;
    height: 42px; line-height: 42px;
}
.keji-pro-filter {
    border: 1px solid var(--keji-border); border-radius: 30px;
    color: var(--keji-text-light); cursor: pointer;
    font-size: 15px; margin-left: 10px;
    padding: 8px 24px;
    transition: var(--keji-transition); font-weight: 500;
}
.keji-pro-filter:hover, .keji-pro-filter-active {
    background: var(--keji-primary); border-color: var(--keji-primary); color: #fff;
    box-shadow: var(--keji-shadow-blue);
}
.keji-pro-ul {
    list-style: none; padding: 0;
    display: flex; flex-wrap: wrap;
    gap: 22px;
}
.keji-pro-li {
    width: calc((100% - 44px) / 3);
    margin-bottom: 20px;
}
.keji-pro-li a {
    display: block; text-decoration: none;
}
.keji-pro-img {
    display: block; height: 288px; width: 100%;
    object-fit: cover; border-radius: var(--keji-radius);
    transition: var(--keji-transition);
    box-shadow: var(--keji-shadow-sm);
}
.keji-pro-li:hover .keji-pro-img {
    transform: scale(1.02);
    box-shadow: var(--keji-shadow-lg);
}
.keji-pro-tit {
    padding: 12px 0; width: 100%;
    display: flex; align-items: center;
}
.keji-pro-tit span {
    color: var(--keji-text); font-size: 16px; font-weight: 500;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* ===== 详情页通用 ===== */
.keji-breadcrumb-section {
    padding: 20px 0; background: #fff;
    border-bottom: 1px solid var(--keji-border);
}
.keji-breadcrumb {
    font-size: 14px; color: var(--keji-text-light);
}
.keji-breadcrumb a { color: var(--keji-primary); }
.keji-breadcrumb a:hover { text-decoration: underline; }
.keji-breadcrumb span { color: var(--keji-text); }

.keji-detail-section { padding: 60px 0; }
.keji-detail-content {
    max-width: 800px; margin: 0 auto;
    line-height: 1.85; font-size: 16px; color: var(--keji-text-secondary);
}
.keji-detail-content h2 { font-size: 24px; color: var(--keji-text); margin: 30px 0 16px; font-weight: 700; }
.keji-detail-content h3 { font-size: 20px; color: var(--keji-text); margin: 24px 0 12px; font-weight: 600; }
.keji-detail-content p { margin-bottom: 16px; }
.keji-detail-content ul, .keji-detail-content ol { margin-bottom: 16px; padding-left: 24px; }
.keji-detail-content li { margin-bottom: 8px; }
.keji-detail-content img { max-width: 100%; border-radius: var(--keji-radius); margin: 20px 0; }
.keji-detail-content code { background: var(--keji-bg-alt); padding: 2px 8px; border-radius: 4px; font-size: 14px; }
.keji-detail-content pre { background: var(--keji-bg-alt); padding: 20px; border-radius: var(--keji-radius); overflow-x: auto; margin: 20px 0; }
.keji-detail-cover { width: 100%; max-height: 400px; object-fit: cover; border-radius: var(--keji-radius); margin-bottom: 30px; }
.keji-detail-text { margin-bottom: 30px; }

/* ===== 解决方案卡片 ===== */
.keji-solution-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.keji-solution-card {
    background: #fff; border: 1px solid var(--keji-border);
    border-radius: var(--keji-radius); overflow: hidden;
    transition: var(--keji-transition);
    box-shadow: var(--keji-shadow-sm);
}
.keji-solution-card:hover {
    border-color: var(--keji-primary);
    box-shadow: var(--keji-shadow-lg);
    transform: translateY(-6px);
}
.keji-solution-cover { height: 200px; overflow: hidden; }
.keji-solution-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.keji-solution-card:hover .keji-solution-cover img { transform: scale(1.05); }
.keji-solution-body { padding: 30px; }
.keji-solution-icon { font-size: 36px; margin-bottom: 16px; }
.keji-solution-body h3 { font-size: 18px; color: var(--keji-text); margin-bottom: 12px; font-weight: 600; }
.keji-solution-body p { font-size: 14px; color: var(--keji-text-light); line-height: 1.7; margin-bottom: 16px; }
.keji-solution-tag {
    display: inline-block; padding: 4px 14px;
    background: rgba(37,99,235,0.08); color: var(--keji-primary);
    border-radius: 20px; font-size: 12px; font-weight: 500;
}

/* ===== 案例详情 ===== */
.keji-case-detail {
    max-width: 800px; margin: 0 auto;
}
.keji-case-detail h2 {
    font-size: 22px; color: var(--keji-primary);
    margin: 40px 0 16px; padding-bottom: 10px;
    border-bottom: 1px solid var(--keji-border); font-weight: 700;
}
.keji-case-detail p {
    font-size: 16px; color: var(--keji-text-secondary); line-height: 1.8; margin-bottom: 16px;
}
/* ===== 关于页 ===== */
.keji-about-culture {
    display: grid; grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}
.keji-about-culture-item {
    text-align: center; padding: 30px 20px;
    background: var(--keji-bg-alt); border-radius: var(--keji-radius);
    transition: var(--keji-transition);
    border: 1px solid transparent;
}
.keji-culture-icon { font-size: 32px; margin-bottom: 16px; }
.keji-about-culture-item:hover {
    background: #fff; box-shadow: var(--keji-shadow-md);
    transform: translateY(-6px); border-color: var(--keji-border);
}
.keji-about-culture-item strong {
    display: block; font-size: 18px; color: var(--keji-primary); margin-bottom: 12px; font-weight: 700;
}
.keji-about-culture-item p { font-size: 14px; color: var(--keji-text-secondary); line-height: 1.7; }

.keji-about-plan {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 60px; margin-bottom: 60px;
}
.keji-about-plan-text p { font-size: 16px; color: var(--keji-text-secondary); line-height: 1.8; }
.keji-about-services h3 { font-size: 20px; color: var(--keji-text); margin-bottom: 20px; font-weight: 700; }
.keji-about-services ul { list-style: none; padding: 0; }
.keji-about-services li {
    font-size: 16px; color: var(--keji-text-secondary); padding: 12px 0;
    border-bottom: 1px solid var(--keji-border);
}
.keji-about-services li::before { content: "✓ "; color: var(--keji-primary); font-weight: 700; }

.keji-about-direction {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.keji-about-dir-item {
    text-align: center; padding: 40px 20px;
    background: #fff; border-radius: var(--keji-radius);
    box-shadow: var(--keji-shadow-sm); transition: var(--keji-transition);
}
.keji-about-dir-item:hover { box-shadow: var(--keji-shadow-md); transform: translateY(-4px); }
.keji-about-dir-item strong {
    display: block; font-size: 24px; color: var(--keji-primary); margin-bottom: 12px; font-weight: 800;
}
.keji-about-dir-item p { font-size: 14px; color: var(--keji-text-light); }

/* ===== 联系页 ===== */
.keji-contact-wrap {
    display: grid; grid-template-columns: 1.2fr 1fr;
    gap: 32px; max-width: 1000px; margin: 0 auto;
    align-items: stretch;
}
/* 留言表单卡片 */
.keji-contact-form-card {
    background: #fff; border-radius: var(--keji-radius-lg);
    padding: 40px; box-shadow: var(--keji-shadow-md);
    border: 1px solid var(--keji-border);
}
.keji-contact-form-card h3 {
    font-size: 22px; color: var(--keji-text); font-weight: 700;
    margin-bottom: 8px;
}
.keji-contact-form-tip {
    font-size: 14px; color: var(--keji-text-light);
    margin-bottom: 28px; line-height: 1.6;
}
.keji-form-field { margin-bottom: 20px; }
.keji-form-field label {
    display: block; font-size: 14px; font-weight: 600;
    color: var(--keji-text); margin-bottom: 8px;
}
.keji-form-required { color: #ef4444; }
.keji-contact-form-page { display: flex; flex-direction: column; }
.keji-contact-form-page input,
.keji-contact-form-page textarea {
    width: 100%; padding: 13px 16px;
    border: 1px solid var(--keji-border); background: var(--keji-bg-alt);
    color: var(--keji-text); border-radius: var(--keji-radius);
    font-size: 16px; transition: var(--keji-transition);
    outline: none;
}
.keji-contact-form-page input::placeholder,
.keji-contact-form-page textarea::placeholder { color: var(--keji-text-light); }
.keji-contact-form-page input:focus,
.keji-contact-form-page textarea:focus {
    border-color: var(--keji-primary); background: #fff;
    box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}
.keji-contact-form-page textarea { resize: vertical; min-height: 120px; line-height: 1.6; }
.keji-contact-form-page button {
    margin-top: 8px; padding: 14px 32px;
    background: linear-gradient(135deg, var(--keji-primary), var(--keji-primary-light));
    color: #fff; border: none; border-radius: 26px;
    font-size: 16px; font-weight: 600; letter-spacing: 4px;
    cursor: pointer; box-shadow: var(--keji-shadow-blue);
    transition: var(--keji-transition);
}
.keji-contact-form-page button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(37,99,235,0.4);
}
/* 联系方式卡片 */
.keji-contact-info {
    padding: 40px; background: linear-gradient(160deg, #f8fafc 0%, #eef4ff 100%);
    border-radius: var(--keji-radius-lg); border: 1px solid var(--keji-border);
}
.keji-contact-info h3 {
    font-size: 22px; color: var(--keji-text); margin-bottom: 28px; font-weight: 700;
    padding-bottom: 16px; border-bottom: 1px solid var(--keji-border);
}
.keji-contact-info p {
    display: flex; align-items: flex-start; gap: 12px;
    font-size: 15px; color: var(--keji-text-secondary);
    margin-bottom: 22px; line-height: 1.6;
}
.keji-contact-info-icon {
    flex-shrink: 0; width: 36px; height: 36px; border-radius: 10px;
    background: rgba(37,99,235,0.08); display: flex;
    align-items: center; justify-content: center;
}
.keji-contact-info-icon .keji-svg-icon { width: 17px; height: 17px; color: var(--keji-primary); }

/* ===== 文章分类筛选 ===== */
.keji-insight-filters {
    display: flex; flex-wrap: wrap; gap: 12px;
    margin-bottom: 40px; padding-bottom: 20px;
    border-bottom: 1px solid var(--keji-border);
}
.keji-insight-filter {
    padding: 8px 24px; border-radius: 30px;
    border: 1px solid var(--keji-border);
    font-size: 14px; color: var(--keji-text-secondary); font-weight: 500;
    transition: var(--keji-transition);
}
.keji-insight-filter:hover {
    border-color: var(--keji-primary); color: var(--keji-primary);
}
.keji-insight-filter-active {
    background: var(--keji-primary); border-color: var(--keji-primary); color: #fff;
    box-shadow: var(--keji-shadow-blue);
}
.keji-insight-filter-active:hover {
    background: var(--keji-primary-dark); color: #fff;
}

/* ===== 分页 ===== */
.keji-pagination {
    display: flex; justify-content: center; gap: 8px;
    margin-top: 50px;
}
.keji-page-btn {
    min-width: 38px; height: 38px; line-height: 38px;
    padding: 0 12px; text-align: center;
    border: 1px solid var(--keji-border); border-radius: 8px;
    font-size: 14px; color: var(--keji-text-secondary); font-weight: 500;
    transition: var(--keji-transition);
}
.keji-page-btn:hover {
    border-color: var(--keji-primary); color: var(--keji-primary);
}
.keji-page-btn-active {
    background: var(--keji-primary); border-color: var(--keji-primary); color: #fff;
    box-shadow: var(--keji-shadow-blue);
}
.keji-page-btn-active:hover {
    background: var(--keji-primary-dark); color: #fff;
}

/* ===== 文章详情 ===== */
.keji-article-detail {
    max-width: 800px; margin: 0 auto;
    background: #fff; padding: 40px; border-radius: var(--keji-radius);
    box-shadow: var(--keji-shadow-sm);
}
.keji-article-cover {
    width: 100%; max-height: 400px; object-fit: cover;
    border-radius: 4px; margin-bottom: 24px;
}
.keji-article-meta {
    display: flex; gap: 20px; font-size: 14px; color: #909399;
    padding-bottom: 20px; border-bottom: 1px solid #ebeef5; margin-bottom: 24px;
}
.keji-insight-cover {
    width: 100%; height: 180px; object-fit: cover;
    border-radius: 4px; margin-bottom: 16px;
}
.keji-insight-meta {
    display: flex; gap: 16px; font-size: 13px; color: #c0c4cc;
}

/* ===== 响应式 ===== */

/* --- 平板（<=1024px）--- */
@media (max-width: 1024px) {
    .keji-service-cards { grid-template-columns: repeat(2, 1fr); }
    .keji-case-grid { grid-template-columns: repeat(2, 1fr); }
    .keji-guarantee-list { grid-template-columns: repeat(3, 1fr); }
    .keji-insight-grid { grid-template-columns: repeat(2, 1fr); }
    .keji-solution-grid { grid-template-columns: repeat(2, 1fr); }
}

/* --- H5 移动端（<=768px）全面优化 --- */
@media (max-width: 768px) {
    /* 基础 */
    body { font-size: 14px; -webkit-tap-highlight-color: transparent; }
    .keji-container { padding: 0 16px; }
    .keji-section { padding: 40px 0; }
    .keji-section-title { font-size: 20px; letter-spacing: 0.5px; padding-bottom: 8px; }
    .keji-section-desc { font-size: 13px; margin-bottom: 28px; letter-spacing: 0; }

    /* Header 导航 */
    .keji-header { height: 56px; }
    .keji-header-inner { height: 56px; padding: 0 16px; }
    .keji-logo { font-size: 18px; font-weight: 700; gap: 8px; }
    .keji-logo-icon { width: 24px; height: 24px; }
    .keji-nav {
        display: none; position: fixed; top: 56px; left: 0; right: 0;
        background: #fff; flex-direction: column;
        padding: 8px 16px 16px; gap: 0;
        box-shadow: 0 8px 24px rgba(0,0,0,0.12);
        max-height: calc(100vh - 56px); overflow-y: auto;
        animation: kejiNavSlide 0.25s ease;
    }
    @keyframes kejiNavSlide {
        from { opacity: 0; transform: translateY(-8px); }
        to { opacity: 1; transform: translateY(0); }
    }
    .keji-header-home .keji-nav { background: var(--keji-deep); }
    .keji-header-home .keji-nav a { color: #fff; }
    .keji-nav.keji-nav-open { display: flex; }
    .keji-nav a {
        height: 46px; line-height: 46px; font-size: 15px;
        border-bottom: 1px solid var(--keji-border);
        padding: 0 4px;
    }
    .keji-header-home .keji-nav a { border-bottom: 1px solid rgba(255,255,255,0.08); }
    .keji-nav a:last-of-type { border-bottom: none; }
    .keji-nav a.active { color: var(--keji-primary); font-weight: 600; }
    .keji-nav-cta {
        margin: 12px 0 4px; height: 42px; line-height: 42px !important;
        text-align: center; border-radius: 21px;
    }
    .keji-nav-toggle {
        display: flex; padding: 10px; margin: -10px;
        border-radius: 8px;
    }
    .keji-nav-toggle span { width: 22px; height: 2px; }
    .keji-nav-toggle.keji-toggle-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .keji-nav-toggle.keji-toggle-open span:nth-child(2) { opacity: 0; }
    .keji-nav-toggle.keji-toggle-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    /* 首页 Banner */
    .keji-banner {
        min-height: 440px; padding: 90px 20px 56px;
        background-size: cover; background-position: center;
    }
    .keji-banner-title { font-size: 26px; margin-bottom: 14px; letter-spacing: 1px; max-width: 100%; line-height: 1.4; }
    .keji-banner-desc { font-size: 14px; margin-bottom: 32px; line-height: 1.8; max-width: 100%; color: rgba(255,255,255,0.8); }
    .keji-banner-qrs { display: none; }
    .keji-banner-btn {
        width: 100%; max-width: 320px; height: 48px; line-height: 48px;
        font-size: 16px; letter-spacing: 4px; border-radius: 24px;
    }

    /* 服务图标网格 */
    .keji-services-grid { padding-bottom: 16px; }
    .keji-icon-item {
        width: 25%; padding: 14px 4px;
        border-radius: 10px;
    }
    .keji-icon-img { width: 40px; height: 40px; margin: 0 auto 8px; }
    .keji-icon-item span { font-size: 12px; color: var(--keji-text-secondary); }

    /* 服务能力卡片 */
    .keji-service-cards { grid-template-columns: 1fr; gap: 12px; }
    .keji-service-card {
        padding: 22px 20px; text-align: left;
        border-radius: 10px; border: 1px solid #ebeef5;
        display: flex; flex-direction: column;
    }
    .keji-service-card h3 { font-size: 16px; margin-bottom: 6px; }
    .keji-service-card p { font-size: 13px; line-height: 1.6; }
    .keji-service-icon { font-size: 26px; margin-bottom: 10px; }
    .keji-service-card-highlight { border-radius: 10px; }

    /* 案例展示 */
    .keji-case-grid { grid-template-columns: 1fr; gap: 14px; }
    .keji-case-card { border-radius: 10px; }
    .keji-case-card img { height: 190px; }
    .keji-case-info { padding: 16px 18px; }
    .keji-case-info h3 { font-size: 16px; margin-bottom: 6px; }
    .keji-case-info p { font-size: 13px; }
    .keji-more-link { margin-top: 26px; }
    .keji-more-link a { padding: 11px 36px; font-size: 14px; border-radius: 22px; border-width: 1.5px; }

    /* 售后保障 */
    .keji-guarantee-list { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .keji-guarantee-item {
        padding: 22px 12px; border-radius: 10px;
    }
    .keji-guarantee-icon { font-size: 26px; margin-bottom: 10px; }
    .keji-guarantee-icon .keji-svg-icon { width: 28px; height: 28px; }
    .keji-guarantee-item h3 { font-size: 14px; }

    /* 技术洞察 */
    .keji-insight-grid { grid-template-columns: 1fr; gap: 14px; }
    .keji-insight-card { padding: 20px; border-radius: 10px; }
    .keji-insight-card h3 { font-size: 16px; margin-bottom: 8px; line-height: 1.5; }
    .keji-insight-card p { font-size: 13px; line-height: 1.6; margin-bottom: 12px; }
    .keji-insight-cover { height: 170px; border-radius: 8px; }
    .keji-insight-meta { gap: 12px; font-size: 12px; }

    /* 为什么选择我们 */
    .keji-why-us-content { grid-template-columns: 1fr; gap: 18px; margin-top: 24px; }
    .keji-why-us-item h3 { font-size: 16px; margin-bottom: 8px; padding-left: 10px; }
    .keji-why-us-item p { font-size: 14px; line-height: 1.75; }

    /* CTA 表单 */
    .keji-contact-cta .keji-section-title { font-size: 20px; }
    .keji-contact-cta .keji-section-desc { font-size: 13px; margin-bottom: 24px; }
    .keji-contact-form { max-width: 100%; gap: 12px; }
    .keji-contact-form input,
    .keji-contact-form textarea {
        padding: 13px 16px; font-size: 16px; /* 16px 防止 iOS 自动缩放 */
        border-radius: 8px;
        background: rgba(255,255,255,0.08);
    }
    .keji-contact-form button {
        padding: 14px 32px; font-size: 16px; letter-spacing: 4px;
        border-radius: 24px; margin-top: 4px;
    }

    /* Footer：紧凑布局（品牌居中 + 链接两列grid） */
    .keji-footer { padding: 32px 0 0; }
    .keji-footer-con {
        width: 100%; max-width: 400px; margin: 0 auto;
        padding: 0 20px;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px 12px;
    }
    /* 品牌区：独占整行，居中 */
    .keji-footer-ul1 {
        grid-column: 1 / -1;
        width: auto !important; position: static;
        text-align: center; padding-bottom: 16px;
        border-bottom: 1px solid rgba(255,255,255,0.08);
        margin: 0 !important;
    }
    .keji-footer-ul1::after { display: none; }
    .keji-footer-ul1 .keji-footer-font20 { height: auto; font-size: 19px; margin-bottom: 10px; letter-spacing: 2px; }
    .keji-footer-ul1 .keji-footer-font20 a { color: #fff; }
    .keji-footer-ul1 .keji-footer-font14 {
        height: auto; font-size: 13px; line-height: 2; color: rgba(255,255,255,0.5);
        display: block;
    }
    /* 首页列：移动端隐藏（品牌名可点击回首页），剩余4列 2x2 对称 */
    .keji-footer-ul-home { display: none; }
    /* 链接列：每个 ul 占一列，文字居中 */
    .keji-footer-ul3, .keji-footer-ul4, .keji-footer-ul5, .keji-footer-ul6 {
        width: auto !important; margin: 0 !important;
        text-align: center;
    }
    .keji-footer-font16 {
        height: auto; font-size: 14px; color: #fff; font-weight: 600;
        margin-bottom: 8px;
    }
    .keji-footer-font14 { height: auto; font-size: 13px; line-height: 2.1; }
    /* 版权栏：独占整行 */
    .keji-footer-but {
        grid-column: 1 / -1;
        width: 100%; padding: 14px 0 0; line-height: 1.8;
        height: auto; font-size: 11px; color: rgba(255,255,255,0.35);
        border-top: 1px solid rgba(255,255,255,0.08); margin-top: 4px;
    }

    /* 悬浮按钮 */
    .keji-float-btn { right: 12px; bottom: 30px; gap: 8px; }
    .keji-float-item { width: 44px; height: 44px; font-size: 18px; }
    .keji-float-panel { right: 12px; bottom: 100px; }
    .keji-float-contact { width: 200px; }
    .keji-float-qr img { width: 120px; height: 120px; }
    /* 楼层电梯：移动端隐藏 */
    .keji-elevator { display: none; }

    /* 内页标题区 */
    .keji-page-header { padding: 84px 20px 32px; }
    .keji-page-header h1 { font-size: 22px; }
    .keji-page-header p { font-size: 13px; }

    /* 案例列表页 */
    .keji-pro-sec { padding: 0 0 40px; }
    .keji-pro-sec-h2 {
        margin: 24px 0 16px;
        flex-wrap: wrap; gap: 8px;
    }
    .keji-pro-title { font-size: 20px; height: auto; line-height: 1.4; width: 100%; }
    .keji-pro-filter { font-size: 13px; padding: 6px 16px; margin-left: 0; border-radius: 16px; }
    .keji-pro-ul { gap: 14px; }
    .keji-pro-li { width: 100%; margin-bottom: 0; }
    .keji-pro-img { height: 200px; border-radius: 10px; }
    .keji-pro-tit { padding: 10px 2px; }
    .keji-pro-tit span { font-size: 14px; }

    /* 面包屑 */
    .keji-breadcrumb-section { padding: 12px 0; }
    .keji-breadcrumb { font-size: 12px; }

    /* 详情页 */
    .keji-detail-section { padding: 28px 0 40px; }
    .keji-detail-content { font-size: 15px; line-height: 1.8; }
    .keji-detail-content h2 { font-size: 19px; margin: 24px 0 12px; }
    .keji-detail-content h3 { font-size: 16px; margin: 20px 0 10px; }
    .keji-detail-content p { margin-bottom: 14px; }
    .keji-detail-content ul, .keji-detail-content ol { padding-left: 20px; }
    .keji-detail-content pre { padding: 14px; font-size: 13px; }
    .keji-detail-cover { max-height: 220px; border-radius: 10px; }

    /* 解决方案卡片 */
    .keji-solution-grid { grid-template-columns: 1fr; gap: 14px; }
    .keji-solution-card { border-radius: 10px; }
    .keji-solution-cover { height: 170px; }
    .keji-solution-body { padding: 18px 20px; }
    .keji-solution-body h3 { font-size: 16px; margin-bottom: 8px; }
    .keji-solution-body p { font-size: 13px; line-height: 1.6; margin-bottom: 12px; }

    /* 案例详情 */
    .keji-case-detail h2 { font-size: 18px; margin: 24px 0 12px; padding-bottom: 8px; }
    .keji-case-detail p { font-size: 14px; line-height: 1.75; margin-bottom: 12px; }

    /* 关于页 */
    .keji-about-culture { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .keji-about-culture-item { padding: 20px 12px; border-radius: 10px; }
    .keji-culture-icon { font-size: 24px; margin-bottom: 10px; }
    .keji-culture-icon .keji-svg-icon { width: 28px; height: 28px; }
    .keji-about-culture-item strong { font-size: 15px; margin-bottom: 8px; }
    .keji-about-culture-item p { font-size: 12px; line-height: 1.6; }
    .keji-about-plan { grid-template-columns: 1fr; gap: 24px; margin-bottom: 30px; }
    .keji-about-plan-text p { font-size: 14px; line-height: 1.75; }
    .keji-about-services h3 { font-size: 16px; margin-bottom: 12px; }
    .keji-about-services li { font-size: 14px; padding: 9px 0; }
    .keji-about-direction { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .keji-about-dir-item { padding: 20px 8px; border-radius: 10px; }
    .keji-about-dir-item strong { font-size: 17px; margin-bottom: 6px; }
    .keji-about-dir-item p { font-size: 12px; line-height: 1.5; }

    /* 联系页 */
    .keji-contact-wrap { grid-template-columns: 1fr; gap: 20px; }
    .keji-contact-form-card { padding: 24px 20px; }
    .keji-contact-form-card h3 { font-size: 18px; }
    .keji-contact-form-tip { font-size: 13px; margin-bottom: 20px; }
    .keji-contact-form-page input,
    .keji-contact-form-page textarea {
        padding: 13px 14px; font-size: 16px; border-radius: 8px;
    }
    .keji-contact-form-page button {
        padding: 13px 32px; font-size: 16px; letter-spacing: 4px;
        border-radius: 22px;
    }
    .keji-contact-info { padding: 24px 20px; border-radius: 10px; }
    .keji-contact-info h3 { font-size: 18px; margin-bottom: 20px; padding-bottom: 12px; }
    .keji-contact-info p { font-size: 14px; margin-bottom: 16px; }
    .keji-contact-info-icon { width: 32px; height: 32px; border-radius: 8px; }
    .keji-contact-info-icon .keji-svg-icon { width: 15px; height: 15px; }

    /* 文章分类筛选 */
    .keji-insight-filters {
        gap: 8px; margin-bottom: 24px; padding-bottom: 16px;
        overflow-x: auto; flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
    }
    .keji-insight-filter { padding: 6px 16px; font-size: 13px; white-space: nowrap; }

    /* 分页 */
    .keji-pagination { gap: 6px; margin-top: 30px; }
    .keji-page-btn { min-width: 32px; height: 32px; line-height: 32px; font-size: 13px; }

    /* 文章详情 */
    .keji-article-cover { max-height: 240px; }
    .keji-article-meta { gap: 12px; font-size: 12px; padding-bottom: 16px; margin-bottom: 16px; }
}

/* --- 小屏手机（<=480px）--- */
@media (max-width: 480px) {
    .keji-banner-title { font-size: 20px; }
    .keji-banner-desc { font-size: 13px; }
    .keji-section-title { font-size: 18px; }
    .keji-guarantee-list { grid-template-columns: 1fr; }
    .keji-about-culture { grid-template-columns: 1fr; }
    .keji-icon-item { width: calc(33.333% - 8px); }
    .keji-pro-title { font-size: 18px; }
}

/* --- 超小屏（<=375px）--- */
@media (max-width: 375px) {
    .keji-logo { font-size: 15px; }
    .keji-banner-title { font-size: 18px; }
    .keji-section-title { font-size: 17px; }
    .keji-icon-item { width: calc(50% - 8px); }
    .keji-float-item { width: 40px; height: 40px; font-size: 16px; }
}

/* ===== 首页优化：Banner 数据指标 ===== */
.keji-banner-stats {
    display: flex; gap: 48px; margin-top: 56px;
    padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.1);
    max-width: 600px;
}
.keji-banner-stat { display: flex; flex-direction: column; }
.keji-banner-stat-value {
    display: flex; align-items: baseline; white-space: nowrap;
}
.keji-banner-stat-num {
    font-size: 36px; font-weight: 800; color: #fff;
    line-height: 1; display: inline-block;
}
.keji-banner-stat-plus, .keji-banner-stat-suffix {
    font-size: 24px; font-weight: 700; color: var(--keji-primary-light);
}
.keji-banner-stat-label {
    font-size: 13px; color: rgba(255,255,255,0.5);
    margin-top: 8px; letter-spacing: 1px;
}

/* ===== 图标横滑 ===== */
.keji-icon-scroll {
    display: flex; gap: 16px; flex-wrap: wrap;
    justify-content: center; padding: 8px 0;
}
.keji-icon-scroll .keji-icon-item {
    width: 110px; padding: 20px 8px;
}

/* ===== 横向时间线 ===== */
.keji-timeline {
    display: flex; gap: 0; margin-top: 20px;
    position: relative; overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
}
.keji-timeline-item {
    flex: 1; min-width: 180px;
    position: relative; padding: 0 20px;
}
/* 连接线 */
.keji-timeline-item::before {
    content: ''; position: absolute; top: 24px; left: 0; right: 0;
    height: 2px; background: linear-gradient(90deg, var(--keji-primary), var(--keji-primary-light));
    opacity: 0.2;
}
.keji-timeline-item:last-child::before { display: none; }
/* 序号圆 */
.keji-timeline-num {
    width: 48px; height: 48px; border-radius: 50%;
    background: linear-gradient(135deg, var(--keji-primary), var(--keji-primary-light));
    color: #fff; font-size: 18px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px; position: relative; z-index: 1;
    box-shadow: var(--keji-shadow-blue);
    transition: var(--keji-transition);
}
.keji-timeline-item:hover .keji-timeline-num {
    transform: scale(1.1);
    box-shadow: 0 12px 36px rgba(37,99,235,0.4);
}
.keji-timeline-content { text-align: center; }
.keji-timeline-content h3 {
    font-size: 16px; color: var(--keji-text); margin-bottom: 8px; font-weight: 600;
}
.keji-timeline-content p {
    font-size: 13px; color: var(--keji-text-light); line-height: 1.6;
}

/* ===== 为什么选择：图标卡片 ===== */
.keji-why-us { background: var(--keji-bg-alt); }
.keji-why-us-content {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 32px; margin-top: 40px;
}
.keji-why-us-item {
    background: #fff; border-radius: var(--keji-radius); padding: 32px;
    box-shadow: var(--keji-shadow-sm); transition: var(--keji-transition);
}
.keji-why-us-item:hover { box-shadow: var(--keji-shadow-md); transform: translateY(-4px); }
.keji-why-us-item p { font-size: 15px; line-height: 1.8; color: var(--keji-text-secondary); text-align: justify; }
.keji-why-us-icon {
    width: 56px; height: 56px; border-radius: 14px;
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(59,130,246,0.05));
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 20px;
}
.keji-why-us-icon .keji-svg-icon {
    width: 28px; height: 28px; color: var(--keji-primary);
}
.keji-why-us-item h3 {
    font-size: 18px; color: var(--keji-text);
    margin-bottom: 14px; font-weight: 700;
}

/* ===== 案例标签 ===== */
.keji-case-tag {
    display: inline-block; padding: 3px 12px;
    background: rgba(37,99,235,0.08); color: var(--keji-primary);
    border-radius: 20px; font-size: 12px; font-weight: 500;
    margin-top: 10px;
}

/* ===== 滚动入场动画 ===== */
.keji-reveal {
    opacity: 0; transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.4,0,0.2,1), transform 0.7s cubic-bezier(0.4,0,0.2,1);
}
.keji-reveal-visible {
    opacity: 1; transform: translateY(0);
}

/* ===== 楼层电梯 ===== */
.keji-elevator {
    position: fixed; right: 24px; top: 50%; transform: translateY(-50%);
    z-index: 90; display: flex; flex-direction: column; gap: 4px;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--keji-border); border-radius: 24px;
    padding: 10px 6px; box-shadow: var(--keji-shadow-md);
}
.keji-elevator-item {
    display: flex; flex-direction: column; align-items: center; gap: 3px;
    padding: 8px 6px; border-radius: 16px;
    transition: var(--keji-transition); position: relative;
}
.keji-elevator-item i {
    width: 6px; height: 6px; border-radius: 50%;
    background: #c5cdd8; transition: var(--keji-transition);
}
.keji-elevator-item span {
    font-size: 11px; color: var(--keji-text-light);
    transition: var(--keji-transition); font-weight: 500;
}
.keji-elevator-item:hover { background: var(--keji-bg-alt); }
.keji-elevator-item:hover i { background: var(--keji-primary); }
.keji-elevator-item:hover span { color: var(--keji-primary); }
.keji-elevator-active i {
    width: 18px; height: 6px; border-radius: 3px;
    background: linear-gradient(90deg, var(--keji-primary), var(--keji-primary-light));
}
.keji-elevator-active span { color: var(--keji-primary); font-weight: 700; }

/* 回顶部按钮 */
.keji-back-top { border: none; outline: none; }
.keji-back-top .keji-svg-icon { width: 22px; height: 22px; }

/* ===== 首页优化：移动端适配 ===== */
@media (max-width: 768px) {
    .keji-banner-stats { gap: 20px; margin-top: 36px; padding-top: 24px; }
    .keji-banner-stat-num { font-size: 26px; }
    .keji-banner-stat-plus, .keji-banner-stat-suffix { font-size: 18px; }
    .keji-banner-stat-label { font-size: 11px; }
    .keji-icon-scroll { gap: 8px; }
    .keji-icon-scroll .keji-icon-item { width: calc(33.333% - 8px); padding: 12px 4px; }
    .keji-timeline {
        flex-direction: column; overflow-x: visible;
        gap: 24px; padding-left: 24px;
    }
    .keji-timeline-item {
        flex: none; min-width: auto; padding: 0 0 0 24px;
        display: flex; align-items: flex-start; gap: 16px;
    }
    .keji-timeline-item::before {
        top: 24px; left: 24px; right: auto; bottom: -24px;
        width: 2px; height: auto; min-height: 24px;
    }
    .keji-timeline-item:last-child::before { display: none; }
    .keji-timeline-num { margin: 0; flex-shrink: 0; }
    .keji-timeline-content { text-align: left; flex: 1; }
    .keji-why-us-content { grid-template-columns: 1fr; }
    .keji-case-tag { font-size: 11px; }
}
@media (max-width: 480px) {
    .keji-banner-stats { gap: 12px; }
    .keji-banner-stat-num { font-size: 22px; }
    .keji-icon-scroll .keji-icon-item { width: calc(50% - 8px); }
}

/* ===== 首页动效系统 ===== */

/* 1. Banner 元素依次入场 */
@keyframes kejiBannerFadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.keji-banner-title {
    animation: kejiBannerFadeUp 0.8s cubic-bezier(0.4,0,0.2,1) 0.2s both;
}
.keji-banner-desc {
    animation: kejiBannerFadeUp 0.8s cubic-bezier(0.4,0,0.2,1) 0.5s both;
}
.keji-banner-btn {
    animation: kejiBannerFadeUp 0.8s cubic-bezier(0.4,0,0.2,1) 0.8s both;
}
.keji-banner-stats {
    animation: kejiBannerFadeUp 1s cubic-bezier(0.4,0,0.2,1) 1.1s both;
}

/* 2. Banner 背景缓慢缩放（Ken Burns） */
@keyframes kejiBannerZoom {
    from { transform: scale(1); }
    to { transform: scale(1.08); }
}
.keji-banner::before {
    animation: kejiBannerZoom 20s ease-out 1s both;
}

/* 3. Banner 右侧光效呼吸 */
@keyframes kejiGlowPulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.15); }
}
.keji-banner::after {
    animation: kejiGlowPulse 6s ease-in-out infinite;
}

/* 4. CTA 按钮呼吸脉冲 */
@keyframes kejiBtnPulse {
    0%, 100% { box-shadow: var(--keji-shadow-blue); }
    50% { box-shadow: 0 8px 32px rgba(37,99,235,0.5), 0 0 0 6px rgba(37,99,235,0.08); }
}
.keji-banner-btn {
    animation: kejiBannerFadeUp 0.8s cubic-bezier(0.4,0,0.2,1) 0.8s both, kejiBtnPulse 3s ease-in-out 2s infinite;
}

/* 5. 标题装饰线展开 */
@keyframes kejiTitleLineGrow {
    from { width: 0; }
    to { width: 48px; }
}
.keji-reveal-visible .keji-section-title::after {
    animation: kejiTitleLineGrow 0.6s ease-out 0.3s both;
}

/* 6. 卡片光泽扫过（hover 时） */
.keji-service-card,
.keji-case-card,
.keji-solution-card,
.keji-why-us-item,
.keji-insight-card {
    position: relative; overflow: hidden;
}
.keji-service-card::before,
.keji-case-card::before,
.keji-solution-card::before,
.keji-why-us-item::before,
.keji-insight-card::before {
    content: ''; position: absolute; top: 0; left: -100%;
    width: 60%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transition: left 0.6s ease; z-index: 1; pointer-events: none;
}
.keji-service-card:hover::before,
.keji-case-card:hover::before,
.keji-solution-card:hover::before,
.keji-why-us-item:hover::before,
.keji-insight-card:hover::before {
    left: 120%;
}

/* 7. 时间线节点入场（依次出现） */
@keyframes kejiTimelinePop {
    from { opacity: 0; transform: scale(0.5); }
    to { opacity: 1; transform: scale(1); }
}
.keji-reveal-visible .keji-timeline-item {
    animation: kejiTimelinePop 0.5s cubic-bezier(0.34,1.56,0.64,1) both;
}
.keji-reveal-visible .keji-timeline-item:nth-child(1) { animation-delay: 0.1s; }
.keji-reveal-visible .keji-timeline-item:nth-child(2) { animation-delay: 0.2s; }
.keji-reveal-visible .keji-timeline-item:nth-child(3) { animation-delay: 0.3s; }
.keji-reveal-visible .keji-timeline-item:nth-child(4) { animation-delay: 0.4s; }
.keji-reveal-visible .keji-timeline-item:nth-child(5) { animation-delay: 0.5s; }
.keji-reveal-visible .keji-timeline-item:nth-child(6) { animation-delay: 0.6s; }

/* 8. 服务图标依次入场 */
@keyframes kejiIconFadeIn {
    from { opacity: 0; transform: translateY(20px) scale(0.8); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.keji-reveal-visible .keji-icon-item {
    animation: kejiIconFadeIn 0.4s ease-out both;
}
.keji-reveal-visible .keji-icon-item:nth-child(1) { animation-delay: 0.05s; }
.keji-reveal-visible .keji-icon-item:nth-child(2) { animation-delay: 0.1s; }
.keji-reveal-visible .keji-icon-item:nth-child(3) { animation-delay: 0.15s; }
.keji-reveal-visible .keji-icon-item:nth-child(4) { animation-delay: 0.2s; }
.keji-reveal-visible .keji-icon-item:nth-child(5) { animation-delay: 0.25s; }
.keji-reveal-visible .keji-icon-item:nth-child(6) { animation-delay: 0.3s; }
.keji-reveal-visible .keji-icon-item:nth-child(7) { animation-delay: 0.35s; }
.keji-reveal-visible .keji-icon-item:nth-child(8) { animation-delay: 0.4s; }
.keji-reveal-visible .keji-icon-item:nth-child(n+9) { animation-delay: 0.45s; }

/* 9. 数据指标数字滑入 */
@keyframes kejiStatSlide {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}
.keji-banner-stats .keji-banner-stat {
    animation: kejiStatSlide 0.5s ease-out both;
}
.keji-banner-stats .keji-banner-stat:nth-child(1) { animation-delay: 1.2s; }
.keji-banner-stats .keji-banner-stat:nth-child(2) { animation-delay: 1.35s; }
.keji-banner-stats .keji-banner-stat:nth-child(3) { animation-delay: 1.5s; }
.keji-banner-stats .keji-banner-stat:nth-child(4) { animation-delay: 1.65s; }

/* 10. 悬浮按钮入场 */
@keyframes kejiFloatIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}
.keji-float-btn { animation: kejiFloatIn 0.5s ease-out 1.5s both; }

/* 11. 楼层电梯入场 */
@keyframes kejiElevatorIn {
    from { opacity: 0; transform: translateX(30px) translateY(-50%); }
    to { opacity: 1; transform: translateX(0) translateY(-50%); }
}
.keji-elevator { animation: kejiElevatorIn 0.5s ease-out 2s both; }

/* 12. 保证项依次入场 */
@keyframes kejiItemPop {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.keji-reveal-visible .keji-guarantee-item {
    animation: kejiItemPop 0.4s ease-out both;
}
.keji-reveal-visible .keji-guarantee-item:nth-child(1) { animation-delay: 0.1s; }
.keji-reveal-visible .keji-guarantee-item:nth-child(2) { animation-delay: 0.2s; }
.keji-reveal-visible .keji-guarantee-item:nth-child(3) { animation-delay: 0.3s; }
.keji-reveal-visible .keji-guarantee-item:nth-child(4) { animation-delay: 0.4s; }
.keji-reveal-visible .keji-guarantee-item:nth-child(5) { animation-delay: 0.5s; }

/* 13. 卡片网格依次入场 */
@keyframes kejiCardFadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.keji-reveal-visible .keji-service-card,
.keji-reveal-visible .keji-case-card,
.keji-reveal-visible .keji-why-us-item,
.keji-reveal-visible .keji-insight-card,
.keji-reveal-visible .keji-solution-card {
    animation: kejiCardFadeUp 0.5s ease-out both;
}
.keji-reveal-visible .keji-service-card:nth-child(1),
.keji-reveal-visible .keji-case-card:nth-child(1),
.keji-reveal-visible .keji-why-us-item:nth-child(1),
.keji-reveal-visible .keji-insight-card:nth-child(1),
.keji-reveal-visible .keji-solution-card:nth-child(1) { animation-delay: 0.1s; }
.keji-reveal-visible .keji-service-card:nth-child(2),
.keji-reveal-visible .keji-case-card:nth-child(2),
.keji-reveal-visible .keji-why-us-item:nth-child(2),
.keji-reveal-visible .keji-insight-card:nth-child(2),
.keji-reveal-visible .keji-solution-card:nth-child(2) { animation-delay: 0.2s; }
.keji-reveal-visible .keji-service-card:nth-child(3),
.keji-reveal-visible .keji-case-card:nth-child(3),
.keji-reveal-visible .keji-why-us-item:nth-child(3),
.keji-reveal-visible .keji-insight-card:nth-child(3),
.keji-reveal-visible .keji-solution-card:nth-child(3) { animation-delay: 0.3s; }
.keji-reveal-visible .keji-service-card:nth-child(4),
.keji-reveal-visible .keji-case-card:nth-child(4),
.keji-reveal-visible .keji-why-us-item:nth-child(4),
.keji-reveal-visible .keji-insight-card:nth-child(4),
.keji-reveal-visible .keji-solution-card:nth-child(4) { animation-delay: 0.4s; }
.keji-reveal-visible .keji-service-card:nth-child(n+5),
.keji-reveal-visible .keji-case-card:nth-child(n+5),
.keji-reveal-visible .keji-insight-card:nth-child(n+5),
.keji-reveal-visible .keji-solution-card:nth-child(n+5) { animation-delay: 0.5s; }

/* 14. 滚动时 Banner 视差（JS 控制 transform） */
.keji-banner::before { will-change: transform; }

/* 15. "查看更多" 箭头滑动 */
.keji-more-link a { position: relative; }
.keji-more-link a::after {
    content: '→'; margin-left: 4px;
    display: inline-block;
    transition: transform 0.3s ease;
}
.keji-more-link a:hover::after { transform: translateX(6px); }

/* 16. 尊重用户偏好：减少动画 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}


/* 表单 AJAX 提交结果提示 */
.keji-form-result {
    margin-top: 12px; padding: 12px 16px;
    border-radius: 8px; font-size: 14px; text-align: center;
    animation: keji-fade-in 0.3s ease;
}
.keji-form-success {
    background: #ecfdf5; color: #065f46;
    border: 1px solid #a7f3d0;
}
.keji-form-error {
    background: #fef2f2; color: #991b1b;
    border: 1px solid #fecaca;
}
@keyframes keji-fade-in {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}