/* ============================================================
   RXStudio - 全局样式
   设计系统 + 布局 + 组件 + 响应式
   ============================================================ */

/* ---------- 设计令牌（CSS 变量） ---------- */
:root {
    /* 品牌色 - 专业商务蓝 */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-accent: #10b981;
    --color-gradient: linear-gradient(135deg, #2563eb 0%, #1e3a8a 100%);

    /* 中性色 */
    --color-heading: #0f172a;
    --color-text: #334155;
    --color-text-light: #64748b;
    --color-bg: #ffffff;
    --color-bg-muted: #f8fafc;
    --color-border: #e2e8f0;

    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

    /* 字号 */
    --fs-body: 16px;
    --fs-lead: 18px;
    --fs-h3: 20px;
    --fs-h2: 36px;
    --fs-h1: 56px;

    /* 间距 */
    --space-section: 96px;
    --space-section-mobile: 64px;
    --container-max: 1200px;
    --container-pad: 24px;

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

    /* 动画 */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 0.25s var(--ease);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    font-size: var(--fs-body);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

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

ul {
    list-style: none;
}

/* ---------- 布局容器 ---------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-pad);
}

.section {
    padding: var(--space-section) 0;
}

.section-muted {
    background: var(--color-bg-muted);
}

/* ---------- 章节标题 ---------- */
.section-head {
    max-width: 720px;
    margin: 0 auto 56px;
    text-align: center;
}

.eyebrow {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: var(--fs-h2);
    font-weight: 700;
    color: var(--color-heading);
    line-height: 1.25;
    margin-bottom: 16px;
}

.section-desc {
    font-size: var(--fs-lead);
    color: var(--color-text-light);
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition),
        background var(--transition), color var(--transition);
    white-space: nowrap;
}

.btn:active {
    transform: translateY(1px);
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: #fff;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-heading);
    border-color: var(--color-border);
}

.btn-ghost:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

/* ---------- 导航栏 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: var(--color-heading);
    font-size: 18px;
}

.logo:hover {
    color: var(--color-heading);
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-gradient);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 13px;
    letter-spacing: 0.02em;
}

.logo-text {
    letter-spacing: 0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 14px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}

.nav-link:hover {
    color: var(--color-primary);
    background: rgba(37, 99, 235, 0.06);
}

.nav-link.active {
    color: var(--color-primary);
}

.nav-cta {
    margin-left: 8px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 0 auto;
    background: var(--color-heading);
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero 首屏 ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    overflow: hidden;
    padding: 120px 0 80px;
    background: var(--color-bg-muted);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* 粒子背景 canvas：铺满 Hero 装饰层，位于网格之上 */
.particle-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    /* hero-bg 父级设置了 pointer-events:none，这里单独开启以接收鼠标交互 */
    pointer-events: auto;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.55;
}

.blob-1 {
    width: 480px;
    height: 480px;
    top: -120px;
    right: -80px;
    background: radial-gradient(circle, #60a5fa, transparent 60%);
}

.blob-2 {
    width: 420px;
    height: 420px;
    bottom: -120px;
    left: -80px;
    background: radial-gradient(circle, #93c5fd, transparent 60%);
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(15, 23, 42, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}

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

.hero-eyebrow {
    display: inline-block;
    padding: 6px 14px;
    margin-bottom: 24px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(37, 99, 235, 0.08);
    border-radius: 999px;
}

.hero-title {
    font-size: var(--fs-h1);
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-heading);
    margin-bottom: 24px;
    background: linear-gradient(135deg, #0f172a 0%, #2563eb 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: var(--fs-lead);
    color: var(--color-text-light);
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.hero-stats li {
    text-align: center;
}

.hero-stats strong {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--color-heading);
    margin-bottom: 4px;
}

.hero-stats span {
    font-size: 14px;
    color: var(--color-text-light);
}

/* ---------- 工作室介绍 About ---------- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px 28px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition),
        border-color var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    color: #fff;
    background: var(--color-gradient);
    border-radius: var(--radius-md);
}

.feature-card h3 {
    font-size: var(--fs-h3);
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 12px;
}

/* ---------- 服务范围 Services ---------- */
.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    padding: 28px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition),
        border-color var(--transition);
}

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

.service-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
    color: var(--color-primary);
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-sm);
}

.service-card h3 {
    font-size: var(--fs-h3);
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--color-text-light);
    margin-bottom: 16px;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-list li {
    padding: 4px 10px;
    font-size: 12px;
    color: var(--color-text);
    background: var(--color-bg-muted);
    border: 1px solid var(--color-border);
    border-radius: 999px;
}

/* ---------- 案例展示 Cases ---------- */
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    overflow: hidden;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.case-cover {
    position: relative;
    height: 180px;
    background: var(--color-gradient);
}

/* 为不同卡片使用不同的渐变背景 */
.case-cover-1 { background: linear-gradient(135deg, #2563eb, #1e3a8a); }
.case-cover-2 { background: linear-gradient(135deg, #0ea5e9, #2563eb); }
.case-cover-3 { background: linear-gradient(135deg, #10b981, #059669); }
.case-cover-4 { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.case-cover-5 { background: linear-gradient(135deg, #8b5cf6, #ec4899); }
.case-cover-6 { background: linear-gradient(135deg, #14b8a6, #0f766e); }

.case-cat {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(255, 255, 255, 0.92);
    border-radius: 999px;
}

.case-body {
    padding: 24px;
}

.case-body h3 {
    font-size: var(--fs-h3);
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 12px;
}

.case-body p {
    color: var(--color-text-light);
    margin-bottom: 16px;
    min-height: 48px;
}

/* ---------- 技术栈 Tech Stack ---------- */
.tech-wrap {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 920px;
    margin: 0 auto;
}

.tech-group {
    padding: 28px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.tech-group-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tech-badge {
    display: inline-block;
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-bg-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.tech-badge:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background: rgba(37, 99, 235, 0.06);
}

/* ---------- 联系我们 Contact ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 40px;
    align-items: start;
}

.contact-info {
    padding: 32px;
    background: var(--color-bg-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.contact-info-title {
    font-size: var(--fs-h3);
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 24px;
}

.contact-list {
    margin-bottom: 32px;
}

.contact-list li {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.contact-list li:last-child {
    border-bottom: none;
}

.contact-label {
    font-size: 13px;
    color: var(--color-text-light);
}

.contact-list a,
.contact-list span {
    font-size: 15px;
    color: var(--color-heading);
    font-weight: 500;
}

.qr-block {
    text-align: center;
}

/* 微信二维码图片：白底圆角，保证扫码对比度 */
.qr-image {
    width: 160px;
    height: 160px;
    margin: 0 auto 12px;
    display: block;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 8px;
    box-sizing: border-box;
}

.qr-block p {
    font-size: 13px;
    color: var(--color-text-light);
}

/* ---------- 表单 ---------- */
.contact-form {
    padding: 32px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

/* 蜜罐字段：视觉隐藏但保留可访问，机器人会填，用于反垃圾 */
.hp-field {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

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

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 8px;
}

.required {
    color: #ef4444;
}

.form-input {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    font-family: inherit;
    color: var(--color-heading);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-input::placeholder {
    color: var(--color-text-light);
}

.form-input.invalid {
    border-color: #ef4444;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.form-tip {
    font-size: 14px;
}

.form-tip.success {
    color: var(--color-accent);
}

.form-tip.error {
    color: #ef4444;
}

/* ---------- 页脚 Footer ---------- */
.footer {
    background: var(--color-heading);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 24px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 12px;
}

.footer-brand .logo:hover {
    color: #fff;
}

.footer-slogan {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-nav a:hover {
    color: #fff;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
    text-align: right;
}

.footer-contact a,
.footer-contact span {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-contact a:hover {
    color: #fff;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-icp {
    text-align: right;
}

/* ---------- 滚动入场动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 响应式：平板 ---------- */
@media (max-width: 960px) {
    :root {
        --fs-h1: 44px;
        --fs-h2: 30px;
        --space-section: 80px;
    }

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

    .tech-wrap {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        grid-template-columns: 1fr 1fr;
    }

    .footer-contact {
        text-align: left;
    }
}

/* ---------- 响应式：移动端 ---------- */
@media (max-width: 640px) {
    :root {
        --fs-h1: 34px;
        --fs-h2: 26px;
        --space-section: var(--space-section-mobile);
    }

    /* 移动端隐藏默认菜单，使用汉堡菜单 */
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 16px var(--container-pad) 24px;
        background: #fff;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        transition: transform var(--transition);
        max-height: calc(100vh - 64px);
        overflow-y: auto;
    }

    .nav-menu.open {
        transform: translateY(0);
    }

    .nav-menu .nav-link {
        padding: 14px 12px;
        border-radius: 0;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-menu .nav-link:last-of-type {
        border-bottom: none;
    }

    .nav-cta {
        margin: 12px 0 0;
        width: 100%;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: 96px;
    }

    .hero-subtitle br {
        display: none;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px 8px;
    }

    .feature-grid,
    .service-grid,
    .case-grid {
        grid-template-columns: 1fr;
    }

    .form-row-2 {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-nav {
        align-items: center;
    }

    .footer-contact {
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .footer-icp {
        text-align: center;
    }
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}