/* 四川本链科技集团有限公司 - 科技平台型官网通用样式 */

:root {
    /* 颜色体系 */
    --color-primary: #0284C7;           /* 科技蓝 */
    --color-primary-dark: #0369A1;
    --color-primary-light: #E0F2FE;
    --color-secondary: #10B981;         /* 数据绿 */
    --color-secondary-dark: #0F9C75;
    --color-secondary-light: #D1FAE5;
    --color-accent: #22D3EE;            /* 高亮线条 */
    --color-dark: #0F172A;
    --color-gray-dark: #1E293B;
    --color-gray-medium: #475569;
    --color-gray-light: #E2E8F0;
    --color-surface: #F8FAFC;
    --color-surface-strong: #EEF2F6;
    --color-light: #FFFFFF;

    --gradient-hero: linear-gradient(135deg, rgba(2,132,199,0.95), rgba(16,185,129,0.92));
    --gradient-card: linear-gradient(160deg, rgba(2,132,199,0.08), rgba(16,185,129,0.06));
    --gradient-dark: linear-gradient(135deg, #0B1728, #0F1F36);

    /* 字体/排版 */
    --font-family-main: 'Alibaba PuHuiTi', 'HarmonyOS Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-family-heading: 'Alibaba PuHuiTi', 'HarmonyOS Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-size-base: 16px;
    --font-size-h1: 2.6rem;
    --font-size-h2: 2rem;
    --font-size-h3: 1.5rem;
    --font-size-h4: 1.25rem;

    /* 间距与圆角 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;

    --border-radius-sm: 4px;
    --border-radius-md: 10px;
    --border-radius-lg: 16px;
    --border-radius-full: 999px;

    /* 阴影与动效 */
    --shadow-sm: 0 4px 12px rgba(2, 8, 20, 0.05);
    --shadow-md: 0 10px 24px rgba(2, 8, 20, 0.12);
    --shadow-lg: 0 18px 38px rgba(2, 8, 20, 0.18);
    --transition-speed: 0.28s;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-main);
    line-height: 1.65;
    color: var(--color-dark);
    background: var(--color-surface);
    letter-spacing: 0.01em;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-speed), opacity var(--transition-speed);
}

a:hover {
    color: var(--color-primary);
}

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

main {
    margin-top: 112px; /* 预留顶部导航高度 */
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    color: var(--color-dark);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

p {
    color: var(--color-gray-medium);
}

section {
    padding: var(--spacing-xxl) 0;
}

.container {
    width: 94%;
    max-width: 1220px;
    margin: 0 auto;
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-col-1 { grid-template-columns: repeat(1, 1fr); }
.grid-col-2 { grid-template-columns: repeat(1, 1fr); }
.grid-col-3 { grid-template-columns: repeat(1, 1fr); }
.grid-col-4 { grid-template-columns: repeat(1, 1fr); }

.col-span-2 { grid-column: span 1; }
.col-span-3 { grid-column: span 1; }

@media (min-width: 768px) {
    .grid-col-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-col-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-col-4 { grid-template-columns: repeat(3, 1fr); }

    .col-span-2 { grid-column: span 2; }
    .col-span-3 { grid-column: span 3; }
}

@media (min-width: 1024px) {
    .grid-col-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-col-4 { grid-template-columns: repeat(4, 1fr); }
}

/* 顶部与导航 */
.topbar {
    display: none !important; /* 需求：移除悬浮框展示 */
}

.topbar .container {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
}

.topbar-inner {
    display: grid;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.top-meta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    color: var(--color-gray-medium);
}

.topbar-toggle {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 6px 12px;
    border-radius: var(--border-radius-full);
    border: 1px solid rgba(2,132,199,0.35);
    background: rgba(2,132,199,0.06);
    color: var(--color-primary);
    font-weight: 700;
    cursor: pointer;
    transition: background var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed);
}

.topbar-toggle:hover {
    background: rgba(2,132,199,0.12);
    color: var(--color-primary-dark);
    border-color: rgba(2,132,199,0.55);
}

.topbar.collapsed {
    width: 72px;
    padding: 12px;
    opacity: 0.9;
    box-shadow: var(--shadow-md);
}

.topbar.collapsed .topbar-inner {
    display: none;
}

.topbar.collapsed .topbar-toggle {
    position: static;
    width: 100%;
    text-align: center;
    background: rgba(2,132,199,0.12);
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(2, 132, 199, 0.08);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0;
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 0.02em;
    white-space: nowrap;
    margin-right: var(--spacing-md);
}

@media (min-width: 768px) {
    .logo { font-size: 1.3rem; }
}

.logo-mark {
    display: none;
}

.nav-menu {
    list-style: none;
    display: none;
    position: absolute;
    top: 68px;
    right: 3%;
    width: 94%;
    background: var(--color-light);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md) 0;
}

.nav-menu > li {
    position: relative;
    padding: 0 var(--spacing-lg);
}

.nav-menu > li > a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: var(--spacing-xs) 0;
    font-weight: 700;
    font-size: 0.95rem;
    white-space: nowrap;
    color: var(--color-dark);
}

.nav-menu > li:hover > a {
    color: var(--color-primary);
}

.nav-actions {
    display: none !important; /* 删除右侧按钮 */
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-actions .btn {
    font-size: 0.95rem;
    padding: 10px 14px;
    white-space: nowrap;
}

.menu-toggle {
    font-size: 1.8rem;
    color: var(--color-primary);
    cursor: pointer;
}

.dropdown-menu {
    list-style: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--color-light);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(2,132,199,0.12);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xs) 0;
    display: none;
}

.nav-menu > li:hover > .dropdown-menu {
    display: block;
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--color-dark);
    font-weight: 600;
}

.dropdown-menu li a:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

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

@media (min-width: 1024px) {
    .menu-toggle { display: none; }
    .nav-menu {
        position: static;
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
        width: auto;
        padding: 0;
        box-shadow: none;
        background: transparent;
    }
    .nav-actions {
        display: none !important;
        gap: var(--spacing-xs);
    }
}

@media (max-width: 767px) {
    .topbar {
        top: auto !important;
        bottom: 20px;
        right: 16px;
        left: auto;
        width: calc(100% - 32px);
    }
}

/* 实用类 */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-subtle { color: var(--color-gray-medium); }
.text-muted { color: rgba(71, 85, 105, 0.9); }
.p-xl { padding: var(--spacing-xl); }
.p-lg { padding: var(--spacing-lg); }
.p-md { padding: var(--spacing-md); }
.m-t-sm { margin-top: var(--spacing-sm); }
.m-t-md { margin-top: var(--spacing-md); }
.m-t-lg { margin-top: var(--spacing-lg); }
.m-t-xxl { margin-top: var(--spacing-xxl); }
.bg-primary { background: var(--color-primary); color: var(--color-light); }
.bg-light { background: var(--color-gray-light); }
.bg-surface { background: var(--color-surface); }

/* 卡片与内容块 */
.card {
    background: linear-gradient(180deg, #ffffff, #fbfdff);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(2,132,199,0.08);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(16, 185, 129, 0.32);
}

.surface {
    background: var(--color-light);
    border: 1px solid rgba(2,132,199,0.06);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 18px;
    border-radius: var(--border-radius-full);
    font-weight: 700;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-speed);
}

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

.btn-primary:hover { background: var(--color-primary-dark); }

.btn-secondary {
    background: var(--color-secondary);
    color: var(--color-light);
    border-color: var(--color-secondary);
}

.btn-secondary:hover { background: var(--color-secondary-dark); }

.btn-ghost {
    background: transparent;
    color: var(--color-primary);
    border-color: rgba(2,132,199,0.3);
}

.btn-ghost:hover {
    background: rgba(2,132,199,0.08);
}

/* 徽章与标签 */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: var(--border-radius-full);
    font-size: 0.9rem;
    background: rgba(2,132,199,0.12);
    color: var(--color-primary);
    font-weight: 700;
}

.badge-success {
    background: rgba(16,185,129,0.12);
    color: var(--color-secondary);
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: var(--border-radius-full);
    background: rgba(2,132,199,0.1);
    color: var(--color-primary);
    font-weight: 700;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-radius: var(--border-radius-full);
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 700;
}

/* 段落与标题组 */
.section-head {
    display: grid;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.section-title {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.7rem;
}

.section-title::before {
    content: '';
    width: 40px;
    height: 4px;
    border-radius: 8px;
    background: var(--gradient-hero);
}

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

/* 英雄区 */
.hero-portal {
    position: relative;
    min-height: 82vh;
    display: grid;
    align-items: center;
    background: var(--gradient-hero);
    overflow: hidden;
    color: var(--color-light);
}

.hero-portal::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(800px at 15% 20%, rgba(255,255,255,0.12), transparent 55%);
    pointer-events: none;
}

.hero-grid {
    position: relative;
    display: grid;
    gap: var(--spacing-xl);
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
}

.hero-content h1 {
    color: var(--color-light);
    font-size: clamp(2.1rem, 3vw, 3rem);
}

.hero-content p {
    color: rgba(255,255,255,0.9);
    font-size: 1.12rem;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.hero-badges {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 10px;
}

.hero-visual {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.hero-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent, rgba(15,23,42,0.4));
}

/* 产品矩阵 */
.product-matrix {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.product-card {
    background: var(--color-light);
    border: 1px solid rgba(2,132,199,0.12);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: relative;
}

.product-card h3 { color: var(--color-primary); }
.product-card .meta { color: var(--color-gray-medium); margin-bottom: var(--spacing-sm); }

/* 特性列表 */
.list-check {
    list-style: none;
    display: grid;
    gap: 10px;
    margin: var(--spacing-sm) 0;
}

.list-check li {
    display: grid;
    grid-template-columns: 24px 1fr;
    align-items: center;
    gap: 10px;
    color: var(--color-gray-medium);
}

.list-check li::before {
    content: '✔';
    color: var(--color-secondary);
    font-weight: 700;
}

/* 指标卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    background: var(--gradient-card);
    border: 1px solid rgba(2,132,199,0.12);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}

.stat-card h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-card p { margin: 0; }

/* Tab 组件 */
.tab-nav {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.tab-button {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-gray-light);
    background: var(--color-light);
    color: var(--color-dark);
    cursor: pointer;
    font-weight: 700;
    transition: all var(--transition-speed);
}

.tab-button.active {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    background: var(--color-primary-light);
}

.tab-panel { display: none; }
.tab-panel.active { display: grid; }

/* 品牌与案例 */
.logo-wall {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
    align-items: center;
}

.logo-tile {
    border: 1px dashed var(--color-gray-light);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    background: var(--color-light);
    text-align: center;
    color: var(--color-gray-medium);
    box-shadow: var(--shadow-sm);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.case-card {
    background: var(--color-light);
    border: 1px solid rgba(2,132,199,0.12);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    display: grid;
    gap: var(--spacing-md);
}

.case-card img { width: 100%; height: 220px; object-fit: cover; }

.case-body { padding: 0 var(--spacing-lg) var(--spacing-lg); }
.case-meta { color: var(--color-gray-medium); font-size: 0.95rem; }

/* CTA 条 */
.cta-banner {
    background: var(--gradient-hero);
    color: var(--color-light);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    display: grid;
    gap: var(--spacing-sm);
    align-items: center;
    grid-template-columns: 2fr auto;
    box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
    .cta-banner { grid-template-columns: 1fr; text-align: center; }
}

/* 页面头部（子页） */
.page-hero {
    position: relative;
    min-height: 320px;
    display: grid;
    align-items: center;
    color: var(--color-light);
    padding: var(--spacing-xl) 0;
    background: var(--gradient-dark);
    overflow: hidden;
}

.page-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15,23,42,0.25), rgba(15,23,42,0.65));
}

.page-hero .container { position: relative; z-index: 1; }

.page-header {
    position: relative !important;
    min-height: 300px !important;
    display: grid !important;
    align-items: center !important;
    color: var(--color-light) !important;
    padding: var(--spacing-xl) 0 !important;
    background-size: cover !important;
    background-position: center !important;
    overflow: hidden !important;
    margin-top: 0 !important;
}

.page-header::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15,23,42,0.25), rgba(15,23,42,0.65));
}

.page-header .container { position: relative; z-index: 1; }
.page-header h1 { color: var(--color-light); }

.breadcrumb {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 0.95rem;
    color: rgba(255,255,255,0.85);
}

.breadcrumb a { color: rgba(255,255,255,0.9); }

/* 列表与信息块 */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
}

.info-card {
    background: var(--color-light);
    border: 1px solid rgba(2,132,199,0.08);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.timeline {
    border-left: 3px solid var(--color-primary);
    padding-left: var(--spacing-lg);
    display: grid;
    gap: var(--spacing-md);
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-md);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-primary);
    box-shadow: 0 0 0 6px rgba(2,132,199,0.16);
}

/* 表单 */
form {
    display: grid;
    gap: var(--spacing-md);
}

label {
    font-weight: 700;
    color: var(--color-gray-dark);
}

input, select, textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(2,132,199,0.2);
    background: var(--color-light);
    transition: border var(--transition-speed), box-shadow var(--transition-speed);
    font-family: inherit;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(2,132,199,0.15);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

/* 表格 */
table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 14px;
    border: 1px solid var(--color-gray-light);
    text-align: left;
}

th {
    background: var(--color-primary-light);
    color: var(--color-dark);
}

/* Footer */
.footer {
    background: #0b1524;
    color: var(--color-gray-light);
    padding: var(--spacing-xl) 0;
    font-size: 0.95rem;
    margin-top: var(--spacing-xl);
}

.footer a { color: var(--color-gray-light); }
.footer a:hover { color: var(--color-primary); }

.footer-links { list-style: none; padding: 0; }
.footer-links li { margin-bottom: var(--spacing-xs); }

.copyright {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255,255,255,0.08);
    text-align: center;
}