/* ==========================================================================
   天津启霖泽科技有限公司 - 官方网站样式表
   设计理念: 严谨、务实、现代化商务科技质感，无AI浮夸虚化
   ========================================================================== */

:root {
    /* 色彩系统 - 稳重大气的商务冷蓝与暖白基调 */
    --color-primary: #0F2C59;         /* 品牌核心深海军蓝 */
    --color-primary-light: #1E3E62;   /* 次级科技蓝 */
    --color-accent: #0284C7;          /* 亮眼点缀科技蓝 */
    --color-accent-hover: #0369A1;
    --color-dark: #0F172A;            /* 正文高对比度文字 */
    --color-muted: #64748B;           /* 辅助说明灰 */
    --color-border: #E2E8F0;          /* 极细分隔线 */
    --color-surface: #FFFFFF;         /* 卡片背景白 */
    --color-bg-alt: #F8FAFC;          /* 浅底交替背景 */
    --color-tag-bg: #EFF6FF;          /* 标签背景浅天蓝 */
    --color-tag-text: #0284C7;

    /* 字体与字阶 */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    
    /* 间距与圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* 阴影层级 */
    --shadow-subtle: 0 1px 3px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.03);
    --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
    --shadow-hover: 0 12px 28px -4px rgba(15, 23, 42, 0.1), 0 4px 10px -2px rgba(15, 23, 42, 0.04);

    /* 布局 */
    --container-max: 1200px;
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    color: var(--color-dark);
    background-color: #FFFFFF;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* ==========================================================================
   按钮与通用组件
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 11px 22px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    line-height: 1.2;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #FFFFFF;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 44, 89, 0.25);
}

.btn-secondary {
    background-color: #FFFFFF;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-bg-alt);
    border-color: #CBD5E1;
    transform: translateY(-1px);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
}

/* ==========================================================================
   顶部导航栏
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

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

.brand-identity {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-symbol {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.brand-text-group {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.brand-subtitle {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--color-muted);
    letter-spacing: 0.08em;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.925rem;
    font-weight: 500;
    color: #334155;
    position: relative;
    padding: 6px 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.25s ease;
}

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

.header-action {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-toggle span {
    width: 100%;
    height: 2px;
    background-color: var(--color-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ==========================================================================
   Hero 区域
   ========================================================================== */
.hero-section {
    position: relative;
    padding: 70px 0 80px;
    background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
    overflow: hidden;
}

.hero-layout {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background-color: #F1F5F9;
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-full);
    font-size: 0.825rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background-color: #10B981;
    border-radius: 50%;
    display: inline-block;
}

.hero-heading {
    font-size: 2.75rem;
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-primary);
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.hero-desc {
    font-size: 1.05rem;
    color: #475569;
    margin-bottom: 32px;
    line-height: 1.75;
}

.hero-cta-group {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-metrics {
    display: flex;
    align-items: center;
    gap: 28px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.metric-item {
    display: flex;
    flex-direction: column;
}

.metric-val {
    font-size: 1.65rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.metric-label {
    font-size: 0.825rem;
    color: var(--color-muted);
    margin-top: 4px;
}

.metric-divider {
    width: 1px;
    height: 36px;
    background-color: var(--color-border);
}

/* 视觉主图 */
.hero-visual {
    position: relative;
}

.visual-card {
    position: relative;
    border-radius: var(--radius-lg);
    background: #FFFFFF;
    padding: 8px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
}

.visual-img-wrap {
    overflow: hidden;
    border-radius: calc(var(--radius-lg) - 6px);
    background: #E2E8F0;
    aspect-ratio: 4 / 3;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.visual-card:hover .hero-img {
    transform: scale(1.02);
}

.visual-floating-tag {
    position: absolute;
    bottom: -16px;
    left: 20px;
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-hover);
    padding: 12px 18px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
}

.tag-icon {
    width: 36px;
    height: 36px;
    background-color: #E0F2FE;
    color: #0284C7;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.tag-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-dark);
}

.tag-sub {
    font-size: 0.75rem;
    color: var(--color-muted);
}

/* ==========================================================================
   通用 Section 规范
   ========================================================================== */
.section {
    padding: 96px 0;
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-block;
    font-size: 0.775rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.15rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--color-muted);
    line-height: 1.7;
}

/* ==========================================================================
   核心业务矩阵 (Core Services)
   ========================================================================== */
.services-section {
    background-color: #FFFFFF;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background-color: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.service-card:hover {
    border-color: #CBD5E1;
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.service-icon-box {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background-color: var(--color-tag-bg);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.service-icon-box svg {
    width: 24px;
    height: 24px;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.service-desc {
    font-size: 0.9rem;
    color: #475569;
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.service-features {
    margin-bottom: 24px;
    border-top: 1px solid #F1F5F9;
    padding-top: 16px;
}

.service-features li {
    font-size: 0.85rem;
    color: #334155;
    margin-bottom: 10px;
    position: relative;
    padding-left: 18px;
}

.service-features li::before {
    content: "•";
    position: absolute;
    left: 4px;
    color: var(--color-accent);
    font-size: 1.1rem;
    line-height: 1;
}

.service-badge {
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary-light);
    background-color: #F1F5F9;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

/* ==========================================================================
   交付流程 (Process)
   ========================================================================== */
.process-section {
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.step-card {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px 22px;
    position: relative;
    box-shadow: var(--shadow-subtle);
}

.step-num {
    font-size: 2rem;
    font-weight: 700;
    color: #CBD5E1;
    line-height: 1;
    margin-bottom: 16px;
    letter-spacing: -0.04em;
}

.step-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.step-desc {
    font-size: 0.875rem;
    color: var(--color-muted);
    line-height: 1.6;
}

/* ==========================================================================
   资质与合规公示 (Qualification)
   ========================================================================== */
.qualification-section {
    background-color: #FFFFFF;
}

.qual-card {
    background: #FFFFFF;
    border: 1px solid #CBD5E1;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    display: grid;
    grid-template-columns: 2fr 1fr;
    overflow: hidden;
}

.qual-main-info {
    padding: 40px;
}

.qual-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}

.qual-icon {
    width: 52px;
    height: 52px;
    background-color: #F1F5F9;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.qual-company-name {
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--color-primary);
}

.qual-status {
    font-size: 0.85rem;
    color: #10B981;
    font-weight: 500;
    display: inline-block;
    margin-top: 4px;
}

.qual-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.qual-item {
    display: flex;
    flex-direction: column;
}

.qual-item.full-width {
    grid-column: 1 / -1;
}

.item-k {
    font-size: 0.825rem;
    color: var(--color-muted);
    margin-bottom: 4px;
}

.item-v {
    font-size: 0.95rem;
    color: var(--color-dark);
    font-weight: 500;
}

.highlight-code {
    font-family: monospace;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary);
    background-color: #F1F5F9;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    display: inline-block;
    width: fit-content;
}

.qual-side-note {
    background-color: #F8FAFC;
    padding: 40px 32px;
    border-left: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.qual-side-note h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 14px;
}

.qual-side-note p {
    font-size: 0.875rem;
    color: #475569;
    line-height: 1.7;
    margin-bottom: 24px;
}

.qual-badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pill-badge {
    font-size: 0.775rem;
    font-weight: 500;
    color: #334155;
    background-color: #E2E8F0;
    padding: 4px 12px;
    border-radius: var(--radius-full);
}

/* ==========================================================================
   关于我们 (About)
   ========================================================================== */
.about-section {
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.about-layout {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    gap: 64px;
    align-items: center;
}

.about-text p {
    font-size: 0.975rem;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 18px;
}

.about-points {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 32px;
}

.point-box {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 20px;
}

.point-box strong {
    display: block;
    font-size: 0.95rem;
    color: var(--color-primary);
    margin-bottom: 6px;
}

.point-box span {
    font-size: 0.85rem;
    color: var(--color-muted);
    line-height: 1.55;
    display: block;
}

.about-card-stat {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.stat-card {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px 20px;
    text-align: center;
    box-shadow: var(--shadow-subtle);
}

.stat-num {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.1;
    display: block;
    margin-bottom: 6px;
}

.stat-text {
    font-size: 0.85rem;
    color: var(--color-muted);
}

/* ==========================================================================
   联系咨询 (Contact)
   ========================================================================== */
.contact-section {
    background-color: #FFFFFF;
    border-top: 1px solid var(--color-border);
}

.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
}

.contact-info-panel {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 36px;
}

.contact-info-panel h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.contact-info-panel > p {
    font-size: 0.9rem;
    color: var(--color-muted);
    margin-bottom: 28px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 22px;
    margin-bottom: 32px;
}

.c-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.c-icon {
    width: 36px;
    height: 36px;
    background-color: #E2E8F0;
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.c-item strong {
    display: block;
    font-size: 0.875rem;
    color: var(--color-primary);
    margin-bottom: 2px;
}

.c-item span {
    font-size: 0.875rem;
    color: #475569;
    line-height: 1.5;
}

.contact-tip-box {
    background-color: #FFFFFF;
    border-left: 3px solid var(--color-accent);
    padding: 16px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.contact-tip-box strong {
    display: block;
    font-size: 0.85rem;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.contact-tip-box p {
    font-size: 0.825rem;
    color: var(--color-muted);
    line-height: 1.5;
}

/* 表单面板 */
.contact-form-panel {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 36px;
    box-shadow: var(--shadow-card);
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: #334155;
    margin-bottom: 6px;
}

.required {
    color: #EF4444;
}

input[type="text"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.925rem;
    color: var(--color-dark);
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    background-color: #FFFFFF;
}

input[type="text"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.12);
}

textarea {
    resize: vertical;
}

.form-feedback {
    margin-top: 16px;
    font-size: 0.875rem;
    display: none;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
}

.form-feedback.success {
    display: block;
    background-color: #ECFDF5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

/* ==========================================================================
   规范页脚 (Footer)
   ========================================================================== */
.site-footer {
    background-color: #0B192C;
    color: #94A3B8;
    padding-top: 64px;
    padding-bottom: 32px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid #1E293B;
}

.footer-summary {
    font-size: 0.875rem;
    line-height: 1.7;
    margin-top: 16px;
    max-width: 380px;
    color: #94A3B8;
}

.footer-nav-col h4 {
    color: #FFFFFF;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 18px;
}

.footer-nav-col ul li {
    margin-bottom: 10px;
}

.footer-nav-col ul li a {
    font-size: 0.875rem;
    color: #94A3B8;
}

.footer-nav-col ul li a:hover {
    color: #FFFFFF;
}

.f-text {
    font-size: 0.85rem;
    margin-bottom: 8px;
    color: #94A3B8;
}

.footer-bottom {
    padding-top: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.825rem;
    color: #64748B;
}

.footer-filing {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-filing a:hover {
    color: #94A3B8;
}

.police-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.sep {
    color: #334155;
}

/* ==========================================================================
   响应式断点 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-heading {
        font-size: 2.25rem;
    }

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

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

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

    .qual-side-note {
        border-left: none;
        border-top: 1px solid var(--color-border);
    }

    .footer-top {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: #FFFFFF;
        border-bottom: 1px solid var(--color-border);
        padding: 20px 24px;
        box-shadow: var(--shadow-card);
    }

    .nav-menu.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-visual {
        order: -1;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-filing {
        flex-wrap: wrap;
        justify-content: center;
    }
}