/* 自定义样式 - 基于Bootstrap的增强 */

/* ========================================
   变量定义 - 明亮温暖配色
   ======================================== */
:root {
    /* 主色系统 - 明亮温暖 */
    --primary-color: #3d2817;           /* 深棕色 - 主文字 */
    --secondary-color: #8b6441;         /* 中棕色 - 副文字 */
    --accent-color: #ff9a56;            /* 温暖橙色 - 强调色 */
    --accent-light: #ffb380;            /* 亮橙色 - 高光 */
    --text-primary: #3d2817;            /* 主文字深棕 */
    --text-secondary: #8b6441;          /* 副文字中棕 */
    --text-muted: #a89075;              /* 辅助文字浅棕 */
    --border-color: rgba(255, 154, 86, 0.2);  /* 边框色 */
    --background-primary: #faf6f1;      /* 主背景米白 */
    --background-secondary: #f0e6d9;    /* 次背景浅棕 */
    --background-card: #ffffff;         /* 卡片背景白色 */

    /* 温暖渐变 */
    --gradient-warm: linear-gradient(135deg, #ff9a56 0%, #ffb380 100%);
    --gradient-bg: linear-gradient(135deg, #f0e6d9 0%, #e8d4bc 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(255, 154, 86, 0.08) 0%, rgba(255, 179, 128, 0.05) 100%);

    /* 柔和阴影 */
    --shadow-sm: 0 2px 4px rgba(61, 40, 23, 0.08);
    --shadow: 0 4px 12px rgba(61, 40, 23, 0.1);
    --shadow-lg: 0 8px 24px rgba(61, 40, 23, 0.12);
    --shadow-warm: 0 4px 20px rgba(255, 154, 86, 0.2);

    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   全局样式
   ======================================== */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
                 'Microsoft YaHei', '微软雅黑', 'Source Han Sans CN', '思源黑体', sans-serif;
    scroll-behavior: smooth;
    background: var(--background-primary);
    color: var(--text-primary);
    font-weight: 400;
    letter-spacing: 0.3px;
}

/* 优雅的滚动条 - 温暖色调 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-light);
}

/* ========================================
   顶部信息栏
   ======================================== */
.top-bar {
    font-size: 14px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.top-bar a:hover {
    opacity: 0.8;
}

/* ========================================
   导航栏增强
   ======================================== */
.navbar {
    transition: var(--transition);
    padding: 1rem 0;
}

.navbar-brand img {
    transition: transform 0.3s ease;
}

.navbar-brand:hover img {
    transform: scale(1.05);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    box-shadow: var(--shadow);
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: var(--transition);
    position: relative;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background: var(--bs-primary);
    transition: var(--transition);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 80%;
    left: 10%;
}

.dropdown-menu {
    animation: fadeIn 0.3s ease;
    border: none;
    box-shadow: var(--shadow);
    border-radius: 10px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   轮播图优化
   ======================================== */
.hero-slide {
    min-height: 500px;
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.hero-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.3);
    z-index: 1;
}

.hero-slide .container {
    position: relative;
    z-index: 2;
}

.min-vh-50 {
    min-height: 50vh;
}

.carousel-control-prev,
.carousel-control-next {
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
    backdrop-filter: blur(10px);
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
    background: rgba(255,255,255,0.3);
}

.carousel-control-prev {
    left: 30px;
}

.carousel-control-next {
    right: 30px;
}

/* ========================================
   卡片样式增强 - 明亮质感
   ======================================== */
.card {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-warm);
    opacity: 0;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-warm);
    border-color: var(--accent-color);
}

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

.service-card {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow-sm);
}

.service-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-overlay);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-warm);
    border-color: var(--accent-color);
}

.service-card:hover::after {
    opacity: 1;
}

.consultant-card .card-img-top {
    height: 300px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.consultant-card:hover .card-img-top {
    transform: scale(1.05);
}

.case-card .card-header {
    font-weight: 600;
    border-bottom: none;
}

.news-card .card-img-top {
    height: 200px;
    object-fit: cover;
}

/* ========================================
   按钮样式增强 - 温暖橙色
   ======================================== */
.btn {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    letter-spacing: 0.5px;
    font-size: 0.9375rem;
    overflow: hidden;
    border-radius: 8px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-warm);
    border: none;
    color: white;
    font-weight: 600;
    box-shadow: var(--shadow-warm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255,154,86,0.5);
    color: white;
}

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

.btn-outline-primary:hover {
    background: var(--gradient-warm);
    color: white;
    border-color: var(--accent-orange-light);
    transform: translateY(-2px);
}

/* ========================================
   特色图标 - 温暖光效
   ======================================== */
.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    position: relative;
}

.feature-icon::before {
    content: '';
    position: absolute;
    inset: -5px;
    background: var(--gradient-warm);
    border-radius: 50%;
    opacity: 0;
    filter: blur(10px);
    transition: var(--transition);
}

.feature-icon:hover {
    transform: scale(1.1) rotate(5deg);
}

.feature-icon:hover::before {
    opacity: 0.4;
}

/* ========================================
   计数器动画
   ======================================== */
.counter {
    position: relative;
}

.counter .display-4 {
    font-weight: 700;
    background: linear-gradient(45deg, #fff, rgba(255,255,255,0.8));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   认证项目
   ======================================== */
.cert-item {
    transition: var(--transition);
}

.cert-item:hover {
    transform: translateY(-10px);
}

.cert-item:hover i {
    transform: scale(1.2);
}

.cert-item i {
    transition: var(--transition);
}

/* ========================================
   返回顶部按钮 - 温暖橙色
   ======================================== */
#btn-back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-warm);
    border: 2px solid var(--border-orange);
    color: white;
    z-index: 999;
    transition: var(--transition);
    box-shadow: var(--shadow-warm);
}

#btn-back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 30px rgba(255,154,86,0.6);
}

/* ========================================
   页脚优化
   ======================================== */
footer {
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

footer a {
    transition: var(--transition);
}

footer a:hover {
    color: var(--accent-color) !important;
    transform: translateX(3px);
}

/* ========================================
   动画效果
   ======================================== */
.fade-in {
    animation: fadeInUp 0.6s ease;
}

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

.slide-in-left {
    animation: slideInLeft 0.6s ease;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.6s ease;
}

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

/* ========================================
   加载动画
   ======================================== */
.spinner-grow-sm {
    width: 1rem;
    height: 1rem;
    margin: 0 0.25rem;
}

/* ========================================
   响应式优化
   ======================================== */
@media (max-width: 991px) {
    .navbar-collapse {
        background: white;
        padding: 1rem;
        border-radius: 10px;
        margin-top: 1rem;
        box-shadow: var(--shadow);
    }

    .hero-slide {
        text-align: center;
    }

    .hero-slide .row {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .display-4 {
        font-size: 2rem;
    }

    .display-5 {
        font-size: 1.75rem;
    }

    .carousel-control-prev,
    .carousel-control-next {
        width: 40px;
        height: 40px;
    }

    .carousel-control-prev {
        left: 10px;
    }

    .carousel-control-next {
        right: 10px;
    }

    .hero-slide {
        min-height: 400px;
        padding: 40px 0;
    }

    #btn-back-to-top {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 576px) {
    .top-bar .row {
        text-align: center;
    }

    .top-bar .text-end {
        text-align: center !important;
        margin-top: 0.5rem;
    }

    .navbar-brand small {
        display: none !important;
    }

    .btn-lg {
        padding: .5rem 1rem;
        font-size: 1rem;
    }
}

/* ========================================
   打印样式
   ======================================== */
@media print {
    .navbar,
    .top-bar,
    footer,
    #btn-back-to-top,
    .btn {
        display: none !important;
    }
}

/* ========================================
   辅助类 - 现代精致风
   ======================================== */
.text-gradient {
    color: var(--accent-color);
    font-weight: 500;
}

.bg-gradient-primary {
    background: var(--secondary-color) !important;
}

.bg-gradient-success {
    background: var(--success-gradient) !important;
}

.bg-gradient-accent {
    background: var(--accent-color) !important;
}

.shadow-hover {
    transition: var(--transition);
}

.shadow-hover:hover {
    box-shadow: var(--shadow) !important;
}

.border-accent {
    border: 1px solid var(--accent-color) !important;
}

/* ========================================
   工具提示和弹出框
   ======================================== */
.tooltip-inner {
    background: var(--primary-color);
    box-shadow: var(--shadow);
}

.popover {
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.popover-header {
    background: var(--secondary-color);
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
}

/* ========================================
   表单美化 - 精致细节
   ======================================== */
.form-control:focus,
.form-select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(184,149,106,0.15);
}

.form-floating > .form-control:focus ~ label {
    color: var(--accent-color);
}

.was-validated .form-control:valid:focus {
    border-color: #198754;
    box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.15);
}

/* ========================================
   徽章和标签
   ======================================== */
.badge {
    font-weight: 500;
    padding: 0.5em 0.75em;
}

.badge.bg-gradient {
    background: var(--accent-color);
    color: white;
}

/* ========================================
   进度条
   ======================================== */
.progress {
    height: 20px;
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    background: var(--accent-color);
    transition: width 0.6s ease;
}

/* ========================================
   标签页
   ======================================== */
.nav-tabs .nav-link {
    border: none;
    color: #6c757d;
    transition: var(--transition);
}

.nav-tabs .nav-link:hover {
    border-color: transparent;
    color: var(--accent-color);
}

.nav-tabs .nav-link.active {
    border: none;
    border-bottom: 2px solid var(--accent-color);
    color: var(--accent-color);
    background: transparent;
}

/* ========================================
   手风琴
   ======================================== */
.accordion-button:not(.collapsed) {
    background: var(--secondary-color);
    color: var(--primary-color);
}

.accordion-button:focus {
    box-shadow: none;
    border-color: var(--border-color);
}

/* ========================================
   面包屑
   ======================================== */
.breadcrumb-item + .breadcrumb-item::before {
    content: "→";
}

.breadcrumb {
    background: var(--secondary-color);
    border-radius: 2px;
    padding: 1rem;
}

/* ========================================
   分页
   ======================================== */
.page-link {
    color: var(--accent-color);
    transition: var(--transition);
}

.page-link:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.page-item.active .page-link {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

/* ========================================
   高端排版系统
   ======================================== */
h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 2.25rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--primary-color);
    margin-bottom: 1.25rem;
    letter-spacing: -0.3px;
}

h3 {
    font-size: 1.75rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

h4 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.875rem;
}

h5 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

small {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-muted);
}

/* 留白美学 */
section {
    padding: 80px 0;
}

@media (min-width: 992px) {
    section {
        padding: 100px 0;
    }
}

.container {
    max-width: 1140px;
}

/* 专属视觉元素 */
.divider-custom {
    height: 1px;
    background: linear-gradient(to right, transparent 0%, var(--border-color) 20%,
                var(--border-color) 80%, transparent 100%);
    margin: 60px 0;
}

blockquote {
    border-left: 3px solid var(--accent-color);
    padding-left: 2rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.9;
}

/* 精致细节 */
.card {
    border-radius: 2px;
}

.service-card {
    border-radius: 2px;
}

.dropdown-menu {
    border-radius: 12px;
}

/* ========================================
   额外的视觉增强
   ======================================== */

/* 图片悬停效果 */
img {
    transition: var(--transition);
}

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

/* 链接微交互 */
a {
    transition: var(--transition);
}

/* Section 标题样式 */
.section-title {
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-warm);
    border-radius: 2px;
}

/* 特色图标增强 */
.bi {
    transition: var(--transition);
}

/* 平滑过渡 */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 选中文本样式 */
::selection {
    background: var(--accent-color);
    color: white;
}

::-moz-selection {
    background: var(--accent-color);
    color: white;
}

/* 加载性能优化 */
.lazyload {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazyloaded {
    opacity: 1;
}

/* 顶部导航增强 */
.navbar .nav-link {
    position: relative;
    padding: 0.5rem 1rem !important;
}

.navbar .nav-link:hover {
    color: var(--accent-color) !important;
}

/* 按钮组增强 */
.btn-group .btn {
    margin: 0;
}

/* 表单元素优化 */
input, textarea, select {
    font-family: inherit;
}

/* 移动端优化 */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    section {
        padding: 60px 0;
    }
}

/* 可访问性增强 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus 可见性 */
a:focus, button:focus, input:focus, textarea:focus, select:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* 性能优化 - GPU 加速 */
.card, .btn, .service-card {
    will-change: transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}