/* ========================================
寅禾星科技 - 全局样式 v3 (Design Overhaul)
======================================== */

:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #3B82F6;
    --gradient: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
    --gradient-accent: linear-gradient(135deg, #2563EB 0%, #7C3AED 50%, #2563EB 100%);
    --secondary: #0A2B4E;
    --accent: #F97316;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --bg-light: #F8FAFC;
    --bg-white: #FFFFFF;
    --text-dark: #1E293B;
    --text-muted: #64748B;
    --text-light: #94A3B8;
    --border: #E2E8F0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-dark);
    background: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ========================================
导航栏
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--secondary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 18px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
    border-radius: 1px;
}

.nav-menu a:hover::after {
    width: 100%;
}

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

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

.nav-menu a.active::after {
    width: 100%;
}

.nav-cta {
    background: var(--gradient) !important;
    color: white !important;
    padding: 10px 24px;
    border-radius: 12px !important;
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

.nav-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
    transition: left 0.5s ease;
}

.nav-cta:hover::before {
    left: 100%;
}

.nav-cta:hover {
    color: white !important;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-dark);
    cursor: pointer;
}

/* ========================================
页面头部
======================================== */
.page-header {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--secondary) 0%, #1e3a5f 40%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
    animation: heroFloat 20s ease-in-out infinite;
}

@keyframes heroFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(2%, -2%) rotate(1deg); }
    66% { transform: translate(-1%, 1%) rotate(-0.5deg); }
}

.page-header h1 {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    line-height: 1.15;
    position: relative;
    z-index: 1;
    animation: heroSlideUp 0.8s ease-out both;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
    position: relative;
    z-index: 1;
    animation: heroSlideUp 0.8s ease-out 0.15s both;
}

@keyframes heroSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.breadcrumb {
    margin-top: 20px;
    font-size: 14px;
    opacity: 0.8;
    position: relative;
    z-index: 1;
}

.breadcrumb a {
    color: white;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* ========================================
通用区块
======================================== */
.section {
    padding: 120px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 64px;
}

.section-title h2 {
    font-size: 40px;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.section-title p {
    font-size: 17px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
按钮
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-slow);
    cursor: pointer;
    border: none;
    text-align: center;
    position: relative;
    overflow: hidden;
    gap: 8px;
}

/* Shine effect for gradient buttons */
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.6s ease;
    z-index: 1;
}

.btn:hover::before {
    left: 100%;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--secondary);
    color: var(--secondary);
}

.btn-outline:hover {
    background: var(--secondary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary {
    background: var(--gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}

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

.btn-secondary:hover {
    background: #0d3a63;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-accent {
    background: var(--accent);
    color: white;
}

.btn-accent:hover {
    background: #ea6508;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(249, 115, 22, 0.35);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.35);
}

.btn-sm {
    padding: 10px 24px;
    font-size: 14px;
}

.btn-lg {
    padding: 18px 40px;
    font-size: 18px;
    border-radius: 14px;
}

/* CTA gradient animation */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.btn-cta-animated {
    background: linear-gradient(270deg, #2563EB, #7C3AED, #2563EB);
    background-size: 200% 200%;
    animation: gradientShift 4s ease infinite;
    color: white;
}

/* ========================================
卡片 (Glass Morphism)
======================================== */
.card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(226, 232, 240, 0.6);
    border-radius: var(--radius-xl);
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

/* Top accent line */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    opacity: 0;
    transition: opacity 0.4s ease;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(37, 99, 235, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
    border-color: rgba(37, 99, 235, 0.2);
}

.card:hover::before {
    opacity: 1;
}

/* ========================================
表单
======================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(8px);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-error {
    border-color: var(--danger) !important;
}

.error-message {
    color: var(--danger);
    font-size: 12px;
    margin-top: 4px;
    display: none;
}

.form-group.error .error-message {
    display: block;
}

/* ========================================
返回顶部按钮
======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-slow);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45);
}

/* ========================================
在线客服
======================================== */
.online-service {
    position: fixed;
    bottom: 30px;
    left: 30px;
    z-index: 999;
}

.service-btn {
    width: 56px;
    height: 56px;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
    transition: var(--transition-slow);
}

.service-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45);
}

.service-popup {
    position: absolute;
    bottom: 70px;
    left: 0;
    background: white;
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-xl);
    width: 280px;
    display: none;
    backdrop-filter: blur(12px);
}

.service-popup.active {
    display: block;
    animation: popupSlideUp 0.3s ease-out;
}

@keyframes popupSlideUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-popup h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 12px;
}

.service-popup p {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.service-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.service-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-light);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
}

.service-option:hover {
    background: var(--border);
}

.service-option i {
    color: var(--primary);
    font-size: 18px;
}

.service-option span {
    font-size: 14px;
    font-weight: 500;
}

/* ========================================
加载动画 / Scroll Animations
======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered scroll reveal */
.fade-in.delay-1 { transition-delay: 0.08s; }
.fade-in.delay-2 { transition-delay: 0.16s; }
.fade-in.delay-3 { transition-delay: 0.24s; }
.fade-in.delay-4 { transition-delay: 0.32s; }
.fade-in.delay-5 { transition-delay: 0.40s; }
.fade-in.delay-6 { transition-delay: 0.48s; }

/* Slide-in variants */
.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-left.visible,
.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-scale {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* ========================================
限时优惠横幅
======================================== */
.promo-banner {
    background: linear-gradient(90deg, var(--accent) 0%, #F59E0B 100%);
}

/* 无JavaScript时显示所有内容 */
noscript + .fade-in,
.fade-in,
noscript + .fade-in-left,
.fade-in-left,
noscript + .fade-in-right,
.fade-in-right,
noscript + .fade-scale,
.fade-scale {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
}

/* ========================================
底部
======================================== */
.footer {
    background: var(--secondary);
    color: white;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 16px;
}

.footer-brand .logo-icon {
    background: rgba(255, 255, 255, 0.2);
}

.footer-brand p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-column ul a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

/* ========================================
响应式
======================================== */
@media (max-width: 992px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
    }

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

    .mobile-toggle {
        display: block;
    }

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

@media (max-width: 576px) {
    .container {
        padding: 0 20px;
    }

    .nav-container {
        padding: 0 20px;
    }

    .page-header {
        padding: 130px 0 50px;
    }

    .page-header h1 {
        font-size: 32px;
    }

    .section {
        padding: 72px 0;
    }

    .section-title h2 {
        font-size: 28px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
    }

    .online-service {
        bottom: 20px;
        left: 20px;
    }
}