/* ===== 全局样式 ===== */
:root {
    --canvas: #fcfcfc;
    --sky-tint: #f0f4fe;
    --midnight: #020520;
    --graphite: #14141e;
    --slate: #374151;
    --fog: #696a72;
    --fog-deep: #95959b;
    --steel: #6b7280;
    --signal-blue: #145aff;
    --action: #0f1f3d;
    --emerald: #16ca2e;
    --coral: #f26052;
    --sky-info: #0099ff;
    --amber: #ffa64d;
    --primary-cta: linear-gradient(rgb(59, 130, 246) 0%, rgb(20, 90, 255) 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--graphite);
    background: var(--canvas);
    line-height: 1.5;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; transition: color 0.2s; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }

/* ===== 容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--sky-tint); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 500;
    color: var(--signal-blue);
    background: rgba(20, 90, 255, 0.08);
    padding: 4px 12px;
    border-radius: 100px;
    margin-bottom: 16px;
    letter-spacing: 0.13px;
}
.section-title {
    font-size: 40px;
    font-weight: 600;
    line-height: 1.08;
    color: var(--midnight);
    letter-spacing: -0.76px;
    margin-bottom: 16px;
}
.section-subtitle {
    font-size: 16px;
    color: var(--fog);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 72px;
    background: rgba(252, 252, 252, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(20, 20, 30, 0.06);
    z-index: 1000;
    transition: all 0.3s;
}
.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex; align-items: center; gap: 10px;
    font-size: 18px; font-weight: 600;
    color: var(--midnight); letter-spacing: -0.16px;
}
.logo-mark {
    width: 32px; height: 32px;
    border-radius: 8px;
    background: var(--primary-cta);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 600; font-size: 14px;
    box-shadow: 0 2px 8px rgba(20, 90, 255, 0.25);
}
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-link {
    padding: 8px 16px;
    font-size: 14px; font-weight: 500;
    color: var(--slate);
    border-radius: 100px;
    transition: all 0.2s;
}
.nav-link:hover, .nav-link.active {
    background: var(--sky-tint);
    color: var(--graphite);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; flex-direction: column; gap: 4px; padding: 8px; cursor: pointer; }
.nav-toggle span { width: 22px; height: 2px; background: var(--midnight); transition: all 0.2s; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 14px; font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    border: 1px solid transparent;
}
.btn-outline {
    background: rgba(255, 255, 255, 0.8);
    color: var(--action);
    border-color: var(--action);
}
.btn-outline:hover { background: var(--action); color: #fff; }
.btn-primary {
    background: var(--primary-cta);
    color: #fff; font-weight: 600;
}
.btn-primary:hover {
    box-shadow: 0 8px 20px rgba(20, 90, 255, 0.3);
    transform: translateY(-1px);
}
.btn-ghost-pill {
    background: rgba(255, 255, 255, 0.9);
    color: var(--graphite);
    border: 1px solid rgba(20, 20, 30, 0.1);
    border-radius: 50px;
    padding: 14px 32px;
    font-size: 16px; font-weight: 500;
    backdrop-filter: blur(8px);
}
.btn-ghost-pill:hover {
    background: #fff;
    border-color: var(--signal-blue);
    color: var(--signal-blue);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}
.btn-text {
    color: var(--action);
    font-size: 14px; font-weight: 500;
    display: inline-flex; align-items: center; gap: 4px;
}
.btn-text:hover { color: var(--signal-blue); }
.btn-text::after { content: '→'; transition: transform 0.2s; }
.btn-text:hover::after { transform: translateX(4px); }

/* ===== Banner (全屏) ===== */
.banner {
    position: relative;
    min-height: 720px;
    display: flex;
    align-items: center;
    overflow: hidden;
    color: #fff;
}
.banner-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
}
.banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
        rgba(2, 5, 32, 0.85) 0%,
        rgba(20, 90, 255, 0.5) 50%,
        rgba(2, 5, 32, 0.75) 100%);
    z-index: 1;
}
.banner-overlay::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(20, 90, 255, 0.3), transparent 60%);
}
.banner-content {
    position: relative;
    z-index: 2;
    max-width: 760px;
    padding: 120px 0 80px;
}
.banner-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    font-size: 12px; font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    backdrop-filter: blur(8px);
}
.hero-badge-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--emerald);
    box-shadow: 0 0 8px var(--emerald);
}
.banner-title {
    font-size: 64px;
    font-weight: 600;
    line-height: 1.05;
    color: #fff;
    letter-spacing: -1.51px;
    margin-bottom: 24px;
}
.banner-title .highlight {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.banner-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
    margin-bottom: 40px;
    max-width: 600px;
}
.banner-actions {
    display: flex; gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 64px;
}
.banner-stats {
    display: flex;
    gap: 56px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}
.banner-stat { text-align: left; }
.stat-num {
    font-family: 'Roboto Mono', monospace;
    font-size: 40px; font-weight: 600;
    color: #fff;
    letter-spacing: -0.76px;
    line-height: 1;
    margin-bottom: 8px;
}
.stat-num sup { font-size: 20px; color: rgba(255,255,255,0.7); }
.stat-label {
    font-size: 13px; color: rgba(255, 255, 255, 0.7);
}

/* ===== 内页Hero ===== */
.page-hero {
    position: relative;
    padding: 160px 0 80px;
    text-align: center;
    background: linear-gradient(135deg, #f0f4fe 0%, #b6cbfd 50%, #f0f4fe 100%);
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 50%; transform: translateX(-50%);
    width: 800px; height: 800px;
    background: radial-gradient(circle, rgba(20, 90, 255, 0.15) 0%, transparent 60%);
    pointer-events: none;
}
.page-breadcrumb {
    font-size: 13px; color: var(--fog);
    margin-bottom: 16px;
    position: relative;
}
.page-breadcrumb a { color: var(--signal-blue); }
.page-title {
    font-size: 56px; font-weight: 600;
    line-height: 1.05;
    color: var(--midnight);
    letter-spacing: -1.51px;
    margin-bottom: 16px;
    position: relative;
}
.page-subtitle {
    font-size: 18px; color: var(--fog);
    max-width: 640px; margin: 0 auto;
    line-height: 1.6;
    position: relative;
}

/* ===== 核心优势 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-card {
    background: #fff;
    border-radius: 16px;
    padding: 32px 24px;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    transition: all 0.3s;
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: rgba(0, 0, 0, 0.12) 0px 4px 16px -2px, rgba(0, 0, 0, 0.08) 0px 8px 24px -4px;
}
.feature-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    background: var(--sky-tint);
    color: var(--signal-blue);
    display: flex; align-items: center; justify-content: center;
    font-size: 22px;
    margin-bottom: 20px;
}
.feature-title {
    font-size: 18px; font-weight: 600;
    color: var(--midnight);
    margin-bottom: 8px;
    letter-spacing: -0.16px;
}
.feature-desc { font-size: 14px; color: var(--fog); line-height: 1.6; }

/* ===== 关于我们 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.about-image {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    min-height: 420px;
    background: var(--sky-tint);
}
.about-image-inner {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s;
}
.about-image:hover .about-image-inner { transform: scale(1.05); }
.about-content .section-eyebrow { margin-bottom: 16px; }
.about-content h2 {
    font-size: 40px; font-weight: 600;
    line-height: 1.08;
    color: var(--midnight);
    letter-spacing: -0.76px;
    margin-bottom: 24px;
}
.about-content p {
    font-size: 15px; color: var(--slate);
    line-height: 1.7; margin-bottom: 16px;
}
.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid rgba(20, 20, 30, 0.08);
}
.stat-num-sm {
    font-family: 'Roboto Mono', monospace;
    font-size: 32px; font-weight: 600;
    color: var(--midnight);
    letter-spacing: -0.22px;
    margin-bottom: 4px;
}
.stat-label-sm { font-size: 13px; color: var(--fog); }

/* ===== 服务项目卡片 ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.service-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    transition: all 0.3s;
    display: flex; flex-direction: column;
}
.service-card:hover {
    transform: translateY(-4px);
    box-shadow: rgba(0, 0, 0, 0.12) 0px 4px 20px -2px, rgba(0, 0, 0, 0.08) 0px 8px 24px -4px;
}
.service-cover {
    position: relative;
    height: 200px;
    background-size: cover;
    background-position: center;
    background-color: var(--sky-tint);
    overflow: hidden;
}
.service-cover-mask {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.5) 100%);
}
.service-cover-title {
    position: absolute;
    bottom: 16px; left: 20px;
    color: #fff;
    font-size: 18px; font-weight: 600;
    letter-spacing: -0.16px;
    z-index: 1;
}
.service-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.service-title {
    font-size: 20px; font-weight: 600;
    color: var(--midnight);
    margin-bottom: 8px;
    letter-spacing: -0.22px;
}
.service-desc {
    font-size: 14px; color: var(--fog);
    line-height: 1.6; margin-bottom: 16px;
    flex: 1;
}
.service-link {
    font-size: 14px; font-weight: 500;
    color: var(--action);
    display: inline-flex; align-items: center; gap: 4px;
    margin-top: auto;
}
.service-link::after { content: '→'; transition: transform 0.2s; }
.service-card:hover .service-link::after { transform: translateX(4px); }
.service-card:hover .service-link { color: var(--signal-blue); }

/* ===== 案例 ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    transition: all 0.3s;
    display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-4px); }
.case-cover {
    position: relative;
    height: 200px;
    background-size: cover;
    background-position: center;
    background-color: var(--sky-tint);
}
.case-cover-mask {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.4) 100%);
    opacity: 0;
    transition: opacity 0.3s;
}
.case-card:hover .case-cover-mask { opacity: 1; }
.case-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.case-title {
    font-size: 18px; font-weight: 600;
    color: var(--midnight);
    margin-bottom: 8px;
    letter-spacing: -0.16px;
}
.case-desc {
    font-size: 14px; color: var(--fog);
    line-height: 1.6; margin-bottom: 16px;
    flex: 1;
}
.case-link {
    font-size: 14px; font-weight: 500;
    color: var(--action);
    margin-top: auto;
}
.case-card:hover .case-link { color: var(--signal-blue); }
.case-link::after { content: ' →'; }

/* ===== 新闻列表 ===== */
.news-list {
    display: flex; flex-direction: column; gap: 16px;
    max-width: 960px; margin: 0 auto;
}
.news-item {
    display: flex; align-items: center; gap: 24px;
    padding: 24px;
    background: #fff;
    border-radius: 16px;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    transition: all 0.3s;
}
.news-item:hover { transform: translateX(4px); border-left: 4px solid var(--signal-blue); padding-left: 20px; }
.news-date {
    flex-shrink: 0;
    width: 88px; text-align: center;
    padding: 12px 0;
    background: var(--sky-tint);
    border-radius: 12px;
}
.news-day {
    font-size: 32px; font-weight: 600;
    color: var(--midnight); line-height: 1;
    letter-spacing: -0.22px;
}
.news-month { font-size: 12px; color: var(--fog); margin-top: 4px; }
.news-content { flex: 1; }
.news-title {
    font-size: 18px; font-weight: 600;
    color: var(--midnight);
    margin-bottom: 6px;
    letter-spacing: -0.16px;
}
.news-summary {
    font-size: 14px; color: var(--fog);
    line-height: 1.5;
}

/* ===== 客户评价 ===== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.testimonial-card {
    background: #fff;
    border-radius: 16px;
    padding: 32px;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    position: relative;
}
.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 8px; left: 24px;
    font-size: 64px; line-height: 1;
    color: var(--signal-blue);
    opacity: 0.15;
    font-family: Georgia, serif;
}
.testimonial-stars {
    color: var(--amber);
    font-size: 16px;
    letter-spacing: 2px;
    margin-bottom: 16px;
}
.testimonial-content {
    font-size: 14px; color: var(--slate);
    line-height: 1.7;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}
.testimonial-author {
    font-size: 13px; color: var(--fog);
    font-weight: 500;
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 64px;
    align-items: start;
}
.contact-info h3 {
    font-size: 28px; font-weight: 600;
    color: var(--midnight);
    margin-bottom: 16px;
    letter-spacing: -0.22px;
}
.contact-info > p {
    font-size: 15px; color: var(--fog);
    line-height: 1.6; margin-bottom: 32px;
}
.contact-list {
    display: flex; flex-direction: column; gap: 20px;
    margin-bottom: 32px;
}
.contact-item {
    display: flex; gap: 16px; align-items: flex-start;
}
.contact-icon {
    width: 40px; height: 40px;
    border-radius: 12px;
    background: var(--sky-tint);
    color: var(--signal-blue);
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}
.contact-detail-label { font-size: 12px; color: var(--fog); margin-bottom: 2px; }
.contact-detail-value { font-size: 15px; color: var(--graphite); font-weight: 500; }

.social-links { display: flex; gap: 12px; }
.social-link {
    width: 40px; height: 40px;
    border-radius: 12px;
    background: var(--sky-tint);
    color: var(--signal-blue);
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
    transition: all 0.2s;
}
.social-link:hover { background: var(--signal-blue); color: #fff; }

/* 表单 */
.contact-form {
    background: #fff;
    border-radius: 24px;
    padding: 40px;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: var(--slate); margin-bottom: 6px; }
.form-control {
    width: 100%;
    padding: 12px 14px;
    background: #fff;
    border: 1px solid #cfcfcf;
    border-radius: 12px;
    font-size: 14px; color: var(--graphite);
    font-family: inherit;
    transition: all 0.2s;
}
.form-control:focus {
    outline: none;
    border-color: var(--sky-info);
    box-shadow: rgba(0, 153, 255, 0.15) 0px 0px 0px 3px;
}
textarea.form-control { resize: vertical; min-height: 120px; }
.form-submit { width: 100%; margin-top: 8px; }

/* 地图 */
.map {
    width: 100%;
    height: 320px;
    border-radius: 24px;
    overflow: hidden;
    margin-top: 32px;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    position: relative;
    background: linear-gradient(135deg, #eef2ff 0%, #dbeafe 50%, #c7d2fe 100%);
    display: flex; align-items: center; justify-content: center;
}
.map-overlay {
    background: rgba(255, 255, 255, 0.92);
    padding: 20px 32px;
    border-radius: 16px;
    backdrop-filter: blur(8px);
    text-align: center;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    max-width: 80%;
}
.map-overlay strong {
    display: block;
    font-size: 16px; color: var(--midnight);
    margin-bottom: 8px;
    font-weight: 600;
}
.map-overlay span {
    display: block;
    font-size: 13px; color: var(--fog);
    margin-bottom: 8px;
}
.map-overlay i { color: var(--signal-blue); margin-right: 4px; }

/* ===== 详情页 ===== */
.detail-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 48px;
    margin-top: 48px;
}
.detail-content {
    background: #fff;
    border-radius: 16px;
    padding: 48px;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    min-height: 600px;
}
.detail-content h2 {
    font-size: 28px; font-weight: 600;
    color: var(--midnight);
    margin: 32px 0 16px;
    letter-spacing: -0.22px;
}
.detail-content h2:first-child { margin-top: 0; }
.detail-content h3 {
    font-size: 20px; font-weight: 600;
    color: var(--graphite);
    margin: 24px 0 12px;
    letter-spacing: -0.22px;
}
.detail-content p {
    font-size: 15px; color: var(--slate);
    line-height: 1.8; margin-bottom: 16px;
}
.detail-content ul, .detail-content ol { margin: 16px 0 16px 24px; color: var(--slate); line-height: 1.8; }
.detail-content li { list-style: disc; margin-bottom: 8px; }
.detail-content ol li { list-style: decimal; }
.detail-content img { border-radius: 12px; margin: 16px 0; }
.detail-content blockquote {
    background: var(--sky-tint);
    padding: 20px 24px;
    border-left: 4px solid var(--signal-blue);
    border-radius: 0 12px 12px 0;
    margin: 24px 0;
    color: var(--slate);
}

.detail-sidebar {
    position: sticky;
    top: 96px;
    align-self: start;
}
.sidebar-block {
    background: #fff;
    border-radius: 16px;
    padding: 24px;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    margin-bottom: 16px;
}
.sidebar-title {
    font-size: 14px; font-weight: 600;
    color: var(--midnight);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.13px;
}
.sidebar-list { display: flex; flex-direction: column; gap: 4px; }
.sidebar-link {
    display: block;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 14px; color: var(--slate);
    transition: all 0.2s;
    border-left: 2px solid transparent;
}
.sidebar-link:hover, .sidebar-link.active {
    background: var(--sky-tint);
    color: var(--graphite);
    border-left-color: var(--signal-blue);
}
.cta-card {
    background: var(--primary-cta);
    color: #fff;
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
}
.cta-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.cta-card p { font-size: 14px; opacity: 0.9; margin-bottom: 20px; line-height: 1.5; }
.cta-card .btn { background: #fff; color: var(--action); width: 100%; }
.cta-card .btn:hover { background: var(--action); color: #fff; }

/* 时间线 */
.timeline { position: relative; padding-left: 32px; }
.timeline::before {
    content: ''; position: absolute;
    left: 8px; top: 0; bottom: 0;
    width: 2px; background: var(--sky-tint);
}
.timeline-item { position: relative; padding-bottom: 32px; }
.timeline-item::before {
    content: ''; position: absolute;
    left: -32px; top: 4px;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--signal-blue);
}
.timeline-year {
    font-family: 'Roboto Mono', monospace;
    font-size: 18px; font-weight: 600;
    color: var(--midnight);
    margin-bottom: 4px;
    letter-spacing: -0.16px;
}
.timeline-title { font-size: 16px; font-weight: 600; color: var(--graphite); margin-bottom: 4px; }
.timeline-desc { font-size: 14px; color: var(--fog); line-height: 1.6; }

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 32px;
}
.team-card {
    background: #fff;
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
}
.team-avatar {
    width: 80px; height: 80px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: var(--sky-tint);
    color: var(--signal-blue);
    display: flex; align-items: center; justify-content: center;
    font-size: 28px; font-weight: 600;
}
.team-name { font-size: 16px; font-weight: 600; color: var(--midnight); margin-bottom: 4px; }
.team-role { font-size: 13px; color: var(--fog); margin-bottom: 8px; }
.team-bio { font-size: 13px; color: var(--steel); line-height: 1.5; }

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 32px;
}
.value-card {
    background: #fff;
    border-radius: 16px;
    padding: 32px 24px;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
}
.value-num {
    font-family: 'Roboto Mono', monospace;
    font-size: 32px; font-weight: 600;
    color: var(--signal-blue);
    margin-bottom: 12px;
    letter-spacing: -0.22px;
}
.value-title { font-size: 18px; font-weight: 600; color: var(--midnight); margin-bottom: 8px; letter-spacing: -0.16px; }
.value-desc { font-size: 14px; color: var(--fog); line-height: 1.6; }

/* 合作伙伴Logo */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 32px;
}
.partner-card {
    background: #fff;
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px, rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px, rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;
    transition: all 0.3s;
}
.partner-card:hover { transform: translateY(-4px); }
.partner-logo {
    width: 100%;
    height: 80px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    margin-bottom: 16px;
    filter: grayscale(20%);
    transition: filter 0.3s;
}
.partner-card:hover .partner-logo { filter: grayscale(0%); }
.partner-name { font-size: 14px; font-weight: 600; color: var(--graphite); }

/* ===== 页脚 ===== */
.footer {
    background: var(--midnight);
    color: #fff;
    padding: 64px 0 32px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    margin-bottom: 48px;
}
.footer-brand { max-width: 320px; }
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6; margin-bottom: 20px;
}
.footer-title {
    font-size: 14px; font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: 0.13px;
    text-transform: uppercase;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-link {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.2s;
}
.footer-link:hover { color: #fff; }
.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.6); margin: 0 8px; }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
    .features-grid, .services-grid, .cases-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-grid, .contact-grid, .detail-layout {
        grid-template-columns: 1fr; gap: 48px;
    }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .team-grid, .partners-grid { grid-template-columns: repeat(2, 1fr); }
    .values-grid { grid-template-columns: 1fr; }
    .banner-title { font-size: 44px; }
    .page-title { font-size: 40px; }
    .section-title { font-size: 32px; }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
    .banner-stats { gap: 32px; }
    .stat-num { font-size: 32px; }
}

@media (max-width: 720px) {
    .nav-links { display: none; }
    .nav-toggle { display: flex; }
    .nav-links.mobile-open {
        display: flex; position: fixed;
        top: 72px; left: 0; right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px 24px;
        gap: 4px;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    }
    .nav-links.mobile-open .nav-link { width: 100%; text-align: left; }
    .features-grid, .services-grid, .cases-grid, .testimonial-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .banner { min-height: 600px; }
    .banner-content { padding: 100px 0 60px; }
    .banner-title { font-size: 36px; letter-spacing: -0.76px; }
    .banner-stats { flex-wrap: wrap; gap: 24px; }
    .stat-num { font-size: 28px; }
    .section { padding: 56px 0; }
    .about-stats { grid-template-columns: 1fr 1fr; gap: 16px; }
    .news-item { flex-direction: column; align-items: flex-start; }
    .news-date { width: 72px; }
    .detail-content { padding: 24px; }
    .team-grid, .partners-grid { grid-template-columns: 1fr; }
}

/* 动画 */
@keyframes fadeUp {
    from { opacity: 0.01; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.6s ease-out forwards; }

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--canvas); }
::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #9ca3af; }