/*
 * AI家教平台 - 前台统一样式
 * 合并优化版本 - 微信绿主色调，现代化设计
 */

/* ===== CSS变量定义 ===== */
:root {
    /* 微信绿主色调配色方案 */
    --wechat-green: #07C160;
    --wechat-green-light: #10D56A;
    --wechat-green-lighter: #4AE78A;
    --wechat-green-dark: #059A4F;
    
    /* 渐变色 */
    --primary-gradient: linear-gradient(135deg, #07C160 0%, #10D56A 100%);
    --secondary-gradient: linear-gradient(135deg, #10D56A 0%, #4AE78A 100%);
    --success-gradient: linear-gradient(135deg, #07C160 0%, #10D56A 100%);
    --warning-gradient: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    --orange-gradient: linear-gradient(135deg, #ffb74d 0%, #ffa726 100%);
    --hero-gradient: linear-gradient(135deg, #07C160 0%, #10D56A 50%, #4AE78A 100%);
    --card-gradient: linear-gradient(135deg, #FFFFFF 0%, #F0FDF4 100%);
    --page-gradient: linear-gradient(135deg, #FAFBFC 0%, #F0FDF4 100%);
    
    /* 明快配色 */
    --bright-white: #FFFFFF;
    --soft-white: #FAFBFC;
    --light-green: #F0FDF4;
    --lighter-green: #DCFCE7;
    
    /* 文字颜色 */
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --text-white: #FFFFFF;
    --dark-color: #2c3e50;
    
    /* 阴影效果 */
    --shadow-sm: 0 2px 8px rgba(7, 193, 96, 0.08);
    --shadow-md: 0 4px 16px rgba(7, 193, 96, 0.12);
    --shadow-lg: 0 8px 24px rgba(7, 193, 96, 0.16);
    --shadow-xl: 0 12px 32px rgba(7, 193, 96, 0.20);
    --shadow-glow: 0 0 20px rgba(7, 193, 96, 0.25);
    
    /* 动画时间 */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 圆角 */
    --radius-xs: 6px;
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --border-radius: 12px;
    
    /* 其他 */
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* ===== 全局样式重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--page-gradient);
    overflow-x: hidden;
    font-weight: 400;
    letter-spacing: 0.01em;
    min-height: 100vh;
}

/* 选择文本颜色 */
::selection {
    background: var(--wechat-green);
    color: var(--bright-white);
}

::-moz-selection {
    background: var(--wechat-green);
    color: var(--bright-white);
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-green);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--wechat-green);
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--wechat-green-dark);
}

/* ===== 导航栏美化 ===== */
.navbar {
    background: var(--primary-gradient) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    padding: 1.2rem 0;
    position: relative;
    z-index: 1000;
}

.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg,
        rgba(255, 255, 255, 0.1) 0%,
        rgba(255, 255, 255, 0.05) 50%,
        rgba(255, 255, 255, 0.1) 100%);
    pointer-events: none;
}

.navbar-scrolled {
    padding: 0.8rem 0;
    box-shadow: var(--shadow-xl);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.8rem;
    color: var(--bright-white) !important;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    letter-spacing: 0.5px;
    transition: var(--transition-normal);
    position: relative;
    z-index: 2;
}

.navbar-brand:hover {
    transform: scale(1.05);
    color: var(--bright-white) !important;
}

.navbar-brand i {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.8rem;
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-glow);
    animation: pulse 3s infinite;
    font-size: 1.2rem;
    transition: var(--transition-normal);
}

.navbar-brand:hover i {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(10deg);
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.95) !important;
    font-weight: 600;
    padding: 0.8rem 1.5rem !important;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin: 0 0.3rem;
    letter-spacing: 0.3px;
    font-size: 0.95rem;
    z-index: 2;
}

.navbar-nav .nav-link::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: var(--transition-slow);
    z-index: -1;
}

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

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--bright-white) !important;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(15px);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.navbar-nav .nav-link.active {
    background: rgba(255, 255, 255, 0.25);
    box-shadow: var(--shadow-lg);
}

/* ===== 下拉菜单美化 ===== */
.dropdown-menu {
    background: var(--bright-white);
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 0.5rem;
    margin-top: 0.5rem;
    backdrop-filter: blur(20px);
}

.dropdown-item {
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    transition: var(--transition-normal);
    color: var(--text-primary);
    font-weight: 500;
}

.dropdown-item:hover {
    background: var(--light-green);
    color: var(--wechat-green-dark);
    transform: translateX(5px);
}

.dropdown-item.active {
    background: var(--primary-gradient);
    color: var(--bright-white);
}

/* ===== 英雄区域 ===== */
.hero-section {
    background: var(--hero-gradient);
    height: 600px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 0;
    margin: 0;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="sparkle" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1.5" fill="white" opacity="0.2"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.15"/><circle cx="50" cy="10" r="0.8" fill="white" opacity="0.25"/><circle cx="20" cy="80" r="1.2" fill="white" opacity="0.18"/><circle cx="80" cy="30" r="1" fill="white" opacity="0.22"/><circle cx="10" cy="50" r="0.6" fill="white" opacity="0.3"/><circle cx="90" cy="60" r="1.3" fill="white" opacity="0.16"/></pattern></defs><rect width="100" height="100" fill="url(%23sparkle)"/></svg>');
    pointer-events: none;
    opacity: 0.6;
    animation: sparkle 20s linear infinite;
}

@keyframes sparkle {
    0% { transform: translateX(0) translateY(0); }
    25% { transform: translateX(-10px) translateY(-5px); }
    50% { transform: translateX(5px) translateY(-10px); }
    75% { transform: translateX(-5px) translateY(5px); }
    100% { transform: translateX(0) translateY(0); }
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease-out;
}

.hero-image {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 400px;
    width: 100%;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    color: var(--bright-white);
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-2xl);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: 5rem;
    font-weight: 900;
    background: linear-gradient(135deg, #ffffff 0%, #f0f8ff 50%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2rem;
    text-shadow: 0 8px 32px rgba(255, 255, 255, 0.3);
    letter-spacing: -2px;
    line-height: 1.1;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    0% { filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.3)); }
    100% { filter: drop-shadow(0 0 40px rgba(255, 255, 255, 0.6)); }
}

.hero-subtitle {
    font-size: 1.4rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    font-weight: 400;
    max-width: 85%;
    line-height: 1.6;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.hero-stat-item {
    text-align: center;
    color: var(--bright-white);
}

.hero-stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-stat-text {
    font-size: 0.9rem;
    opacity: 0.9;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* ===== 英雄区域图标和动画 ===== */
.hero-icon-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-height: 300px;
}

.hero-icon {
    font-size: 8rem;
    color: rgba(255, 255, 255, 0.9);
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 8px 32px rgba(255, 255, 255, 0.3));
    z-index: 3;
    position: relative;
}

.hero-particles {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: particleFloat 4s ease-in-out infinite;
}

.particle:nth-child(1) {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.particle:nth-child(2) {
    top: 80%;
    left: 80%;
    animation-delay: 1s;
}

.particle:nth-child(3) {
    top: 60%;
    left: 10%;
    animation-delay: 2s;
}

.particle:nth-child(4) {
    top: 10%;
    left: 70%;
    animation-delay: 3s;
}

.particle:nth-child(5) {
    top: 40%;
    left: 90%;
    animation-delay: 0.5s;
}

.hero-floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.floating-element {
    position: absolute;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: floatingElement 6s ease-in-out infinite;
}

.floating-element i {
    color: rgba(255, 255, 255, 0.9);
}

.fe-1 {
    width: 60px;
    height: 60px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.fe-1 i {
    font-size: 1.5rem;
}

.fe-2 {
    width: 50px;
    height: 50px;
    top: 70%;
    right: 20%;
    animation-delay: 2s;
}

.fe-2 i {
    font-size: 1.2rem;
}

.fe-3 {
    width: 45px;
    height: 45px;
    top: 30%;
    right: 10%;
    animation-delay: 4s;
}

.fe-3 i {
    font-size: 1.1rem;
}

.fe-4 {
    width: 55px;
    height: 55px;
    bottom: 20%;
    left: 15%;
    animation-delay: 1s;
}

.fe-4 i {
    font-size: 1.3rem;
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.8;
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
        opacity: 1;
    }
}

@keyframes floatingElement {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    33% {
        transform: translateY(-15px) rotate(120deg);
    }
    66% {
        transform: translateY(-5px) rotate(240deg);
    }
}

/* ===== 页面标题美化 ===== */
.section-badge {
    display: inline-block;
    background: var(--primary-gradient);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    box-shadow: var(--box-shadow);
}

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* ===== 按钮美化 ===== */
.btn {
    border-radius: var(--radius-lg);
    font-weight: 700;
    padding: 1.1rem 2.5rem;
    border: none;
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    letter-spacing: 0.3px;
    font-size: 1rem;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent);
    transition: var(--transition-slow);
    z-index: 1;
}

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

.btn > * {
    position: relative;
    z-index: 2;
}

.btn-primary {
    background: var(--primary-gradient) !important;
    color: var(--bright-white) !important;
    border: none;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-xl);
    background: var(--secondary-gradient) !important;
    color: var(--bright-white) !important;
}

.btn-primary:active {
    transform: translateY(-2px) scale(1.01);
}

.btn-success {
    background: var(--success-gradient) !important;
    color: white !important;
    border: none;
}

.btn-success:hover,
.btn-success:focus,
.btn-success:active {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(7, 193, 96, 0.4);
    color: white !important;
    background: var(--success-gradient) !important;
    border: none;
}

.btn-warning {
    background: var(--warning-gradient) !important;
    color: var(--dark-color) !important;
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 193, 7, 0.4);
    color: var(--dark-color) !important;
}

.btn-orange {
    background: var(--orange-gradient) !important;
    color: white !important;
}

.btn-orange:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 152, 0, 0.4);
    color: white !important;
}

.btn-outline-light {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.4);
    color: var(--bright-white) !important;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.6);
    color: var(--bright-white) !important;
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.btn-outline-primary {
    background: transparent;
    border: 2px solid var(--wechat-green);
    color: var(--wechat-green) !important;
    box-shadow: var(--shadow-sm);
}

.btn-outline-primary:hover {
    background: var(--wechat-green);
    color: var(--bright-white) !important;
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.btn-lg {
    padding: 1.3rem 3rem;
    font-size: 1.1rem;
    border-radius: var(--radius-xl);
}

.btn-sm {
    padding: 0.6rem 1.5rem;
    font-size: 0.85rem;
    border-radius: var(--radius-md);
}

/* 特殊按钮效果 */
.glow-button {
    animation: buttonGlow 2s ease-in-out infinite alternate;
}

@keyframes buttonGlow {
    0% { box-shadow: var(--shadow-lg); }
    100% { box-shadow: var(--shadow-glow); }
}

.shine {
    position: relative;
    overflow: hidden;
}

.shine::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent);
    transition: var(--transition-slow);
}

.shine:hover::after {
    left: 100%;
}

/* ===== 卡片美化 ===== */
.card {
    background: var(--card-gradient);
    border: none;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(7, 193, 96, 0.1);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: var(--transition-normal);
    transform-origin: left;
}

.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
        rgba(7, 193, 96, 0.02) 0%,
        rgba(16, 213, 106, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: none;
}

.card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: rgba(7, 193, 96, 0.2);
}

.card:hover::before {
    transform: scaleX(1);
}

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

.card-body {
    padding: 2.5rem;
    position: relative;
    z-index: 2;
}

/* 智能体卡片内容层级 */
.agent-card .card-body {
    position: relative;
    z-index: 2;
}

.card-header {
    background: var(--light-green);
    border-bottom: 1px solid rgba(7, 193, 96, 0.1);
    padding: 1.5rem 2.5rem;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.card-footer {
    background: var(--light-green);
    border-top: 1px solid rgba(7, 193, 96, 0.1);
    padding: 1.5rem 2.5rem;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* ===== 智能体卡片 ===== */
.agent-card {
    background: var(--card-gradient);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(7, 193, 96, 0.1);
    cursor: pointer;
    height: 100%;
    display: flex;
    flex-direction: column;
    text-align: center;
}

.agent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.agent-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center,
        rgba(7, 193, 96, 0.05) 0%,
        transparent 70%);
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: none;
}

.agent-card:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: var(--shadow-xl);
    border-color: rgba(7, 193, 96, 0.3);
}

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

.agent-card:hover::before {
    transform: scaleX(1);
}

.agent-card .text-muted {
    color: rgba(44, 62, 80, 0.8) !important;
}

.agent-avatar-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: 1rem;
}

.agent-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid white;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.agent-card:hover .agent-avatar {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
    border-color: #07C160;
}

/* 智能体卡片背景装饰 */
.agent-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
        rgba(7, 193, 96, 0.02) 0%,
        rgba(16, 213, 106, 0.05) 50%,
        rgba(74, 231, 138, 0.03) 100%);
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: none;
    z-index: 1;
}

.agent-card:hover .agent-card-bg {
    opacity: 1;
}

/* ===== 徽章美化 ===== */
.badge {
    border-radius: var(--radius-xl);
    padding: 0.5rem 1rem;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
}

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

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

.badge.bg-warning {
    background: var(--warning-gradient) !important;
    color: var(--dark-color) !important;
}

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

.badge.bg-info {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%) !important;
    color: var(--dark-color) !important;
}

/* ===== 表单美化 ===== */
.form-control,
.form-select {
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    transition: var(--transition);
    background: white;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--wechat-green);
    box-shadow: 0 0 0 0.2rem rgba(7, 193, 96, 0.25);
    transform: translateY(-2px);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
}

/* ===== 动画效果 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

.fade-in-left {
    animation: fadeInLeft 0.8s ease-out;
}

.fade-in-right {
    animation: fadeInRight 0.8s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

.float {
    animation: float 3s ease-in-out infinite;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-section {
        height: auto;
        min-height: 500px;
        padding: 2rem 0;
    }

    .hero-image {
        min-height: 250px;
    }

    .hero-icon {
        font-size: 5rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .btn-lg {
        padding: 0.875rem 2rem;
        font-size: 1rem;
    }

    .agent-card {
        padding: 1.5rem;
    }

    .agent-avatar {
        width: 60px;
        height: 60px;
    }

    .card-body {
        padding: 1.5rem;
    }

    .navbar {
        padding: 0.8rem 0;
    }

    .navbar-brand {
        font-size: 1.5rem;
    }

    .navbar-nav .nav-link {
        padding: 0.6rem 1rem !important;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
        letter-spacing: -1px;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-stats {
        gap: 2rem;
        justify-content: center;
    }

    .hero-stat-number {
        font-size: 2rem;
    }

    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.85rem;
    }

    .agent-card {
        padding: 1rem;
    }

    .agent-avatar {
        width: 50px;
        height: 50px;
    }
}

/* ===== 步骤卡片样式 ===== */
.step-card {
    background: var(--card-gradient);
    border-radius: var(--radius-xl);
    padding: 3rem 2rem;
    text-align: center;
    border: 1px solid rgba(7, 193, 96, 0.1);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    height: 100%;
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.step-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(7, 193, 96, 0.2);
}

.step-card:hover::before {
    transform: scaleX(1);
}

.step-number {
    display: inline-block;
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 800;
    line-height: 60px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

.step-icon {
    font-size: 3rem;
    color: var(--wechat-green);
    margin-bottom: 1.5rem;
}

.step-icon i {
    animation: pulse 2s infinite;
}

/* ===== 页脚样式 ===== */
.footer-section {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 4rem 0 2rem;
    position: relative;
    overflow: hidden;
}

.footer-wave {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.footer-wave svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 60px;
}

.footer-wave .shape-fill {
    fill: var(--soft-white);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-normal);
}

.footer-links a:hover {
    color: var(--wechat-green-light);
    transform: translateX(5px);
}

.footer-contact {
    list-style: none;
    padding: 0;
}

.footer-contact li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.8);
}

.footer-contact i {
    margin-right: 0.75rem;
    color: var(--wechat-green-light);
    width: 16px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition-normal);
    backdrop-filter: blur(10px);
}

.social-link:hover {
    background: var(--wechat-green);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 3rem;
    padding-top: 2rem;
}

.copyright,
.terms {
    margin: 0;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.terms a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-normal);
}

.terms a:hover {
    color: var(--wechat-green-light);
}

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}