/*
 * Bowen Education Group - Main Stylesheet
 * 博文教育集团 - 主样式表
 *
 * Design Philosophy: Clean, modern, bilingual
 * 设计理念：简洁、现代、双语
 */

/* ========================================
   CSS VARIABLES - Design Tokens
   ======================================== */
:root {
    /* Colors - Primary */
    --color-primary: #c8102e;           /* Chinese Red / 中国红 */
    --color-primary-light: #e63946;
    --color-primary-dark: #9d0b23;
    --color-secondary: #1e3a8a;         /* Deep Blue / 深蓝 */
    --color-secondary-light: #3b82f6;
    --color-secondary-dark: #1e40af;

    /* Colors - Neutrals */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Colors - Semantic */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Typography - Fonts */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-chinese: 'Noto Sans SC', 'Microsoft YaHei', '微软雅黑', sans-serif;
    --font-heading: 'Playfair Display', Georgia, serif;

    /* Typography - Sizes */
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    --font-size-5xl: 3rem;        /* 48px */
    --font-size-6xl: 3.75rem;     /* 60px */

    /* Spacing */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-2xl: 3rem;      /* 48px */
    --spacing-3xl: 4rem;      /* 64px */
    --spacing-4xl: 6rem;      /* 96px */

    /* Border Radius */
    --radius-sm: 0.25rem;     /* 4px */
    --radius-md: 0.5rem;      /* 8px */
    --radius-lg: 0.75rem;     /* 12px */
    --radius-xl: 1rem;        /* 16px */
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;

    /* Container */
    --container-max-width: 1200px;
}

/* ========================================
   BASE STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Chinese text styling */
.text-chinese,
*[class*="-chinese"] {
    font-family: var(--font-chinese);
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-md);
}

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

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

/* ========================================
   LAYOUT
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(var(--spacing-md) * -1);
}

.row > * {
    padding: 0 var(--spacing-md);
}

/* Grid columns */
.col-lg-3 { flex: 0 0 25%; max-width: 25%; }
.col-lg-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
.col-lg-6 { flex: 0 0 50%; max-width: 50%; }
.col-lg-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
.col-lg-12 { flex: 0 0 100%; max-width: 100%; }

.col-md-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
.col-md-6 { flex: 0 0 50%; max-width: 50%; }
.col-md-12 { flex: 0 0 100%; max-width: 100%; }

.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-lg-0 { margin-bottom: 0; }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.text-center { text-align: center; }
.align-items-center { align-items: center; }

/* Background colors */
.bg-light { background-color: var(--color-gray-50); }
.bg-primary { background-color: var(--color-primary); }
.text-white { color: var(--color-white) !important; }
.text-danger { color: var(--color-error); }

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: 9999;
}

.skip-link:focus {
    top: 0;
}

/* Site Header */
.site-header {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 10;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.98);
}

/* Top Bar */
.top-bar {
    background: var(--color-gray-50);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left,
.top-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.top-bar-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-gray-600);
}

.top-bar-item .icon {
    width: 16px;
    height: 16px;
}

.top-bar-item a {
    color: var(--color-gray-600);
    text-decoration: none;
}

.top-bar-item a:hover {
    color: var(--color-primary);
}

/* Social Links */
.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
}

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

/* Language Switcher */
.language-switcher {
    position: relative;
    z-index: 1100;
}

.language-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-gray-600);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.language-toggle:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 120px;
    margin-top: var(--spacing-xs);
    overflow: hidden;
    z-index: 1101;
}

.language-dropdown li {
    list-style: none;
}

.language-dropdown a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-gray-700);
    text-decoration: none;
    transition: background var(--transition-fast);
}

.language-dropdown a:hover {
    background: var(--color-gray-50);
    color: var(--color-primary);
}

/* Main Header */
.main-header {
    padding: var(--spacing-md) 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

/* Logo */
.header-logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
}

.header-logo img {
    height: 60px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text strong {
    font-size: var(--font-size-lg);
    color: var(--color-gray-900);
}

.logo-text small {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-family: var(--font-chinese);
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
}

@media (min-width: 992px) {
    .desktop-nav {
        display: block;
    }
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0;
    flex-wrap: nowrap;
}

.nav-item {
    position: relative;
    flex-shrink: 0;
}

.nav-link {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-sm);
    color: var(--color-gray-700);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
    vertical-align: middle;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: var(--color-gray-50);
}

.nav-link-chinese {
    font-family: var(--font-chinese);
    font-size: 14px;
    color: var(--color-gray-700);
    white-space: nowrap;
    display: inline-block;
    vertical-align: middle;
}

.dropdown-icon {
    width: 12px;
    height: 12px;
    display: inline-block;
    vertical-align: middle;
    margin-left: 4px;
    transition: transform var(--transition-fast);
}

.nav-item.has-dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm);
    margin-top: 0;
    list-style: none;
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1050;
}

.dropdown-menu.show {
    opacity: 1;
    transform: translateY(0);
}

.nav-item.has-dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-gray-700);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    background: var(--color-gray-50);
    color: var(--color-primary);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    color: var(--color-gray-600);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.search-toggle:hover {
    background: var(--color-gray-50);
    color: var(--color-primary);
}

.header-cta {
    display: none;
}

@media (min-width: 768px) {
    .header-cta {
        display: inline-flex;
    }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

@media (min-width: 992px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background: var(--color-gray-700);
    transition: all var(--transition-base);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translateY(7px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translateY(-7px);
}

/* Search Overlay */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.search-overlay[hidden] {
    display: none !important;
}

.search-overlay-content {
    position: relative;
    width: 100%;
    max-width: 600px;
}

.search-close {
    position: absolute;
    top: calc(var(--spacing-xl) * -1);
    right: 0;
    background: none;
    border: none;
    color: var(--color-white);
    cursor: pointer;
    padding: var(--spacing-sm);
}

.search-form {
    display: flex;
    gap: var(--spacing-md);
}

.search-form input {
    flex: 1;
    padding: var(--spacing-md);
    font-size: var(--font-size-lg);
    border: none;
    border-radius: var(--radius-md);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 320px;
    background: var(--color-white);
    box-shadow: var(--shadow-xl);
    overflow-y: auto;
    z-index: 9998;
    transform: translateX(100%);
    transition: transform var(--transition-base);
}

.mobile-menu[hidden] {
    display: none;
}

.mobile-menu:not([hidden]) {
    display: block;
    transform: translateX(0);
}
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 9997;
}

.mobile-nav-menu {
    list-style: none;
    padding: var(--spacing-xl) 0;
}

.mobile-nav-item {
    border-bottom: 1px solid var(--color-gray-100);
}

.mobile-nav-link {
    display: block;
    padding: var(--spacing-md) var(--spacing-xl);
    color: var(--color-gray-700);
    text-decoration: none;
    font-weight: 500;
}

.mobile-nav-link:hover {
    color: var(--color-primary);
    background: var(--color-gray-50);
}

.mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    background: none;
    border: none;
    text-align: left;
    font-weight: 500;
    color: var(--color-gray-700);
    cursor: pointer;
}

.mobile-nav-toggle:hover {
    color: var(--color-primary);
    background: var(--color-gray-50);
}

.mobile-submenu {
    background: var(--color-gray-50);
    padding: var(--spacing-sm) 0;
}

.mobile-submenu li {
    list-style: none;
}

.mobile-submenu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-xl) var(--spacing-sm) calc(var(--spacing-xl) * 2);
    color: var(--color-gray-600);
    text-decoration: none;
}

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

.mobile-nav-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-200);
}

.nav-chinese {
    font-family: var(--font-chinese);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.mobile-quick-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl) 0;
}

.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: calc(64px + env(safe-area-inset-bottom));
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    display: none;
    align-items: center;
    justify-content: space-around;
    z-index: 10000;
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -4px 12px rgba(0,0,0,0.06);
}

.mobile-bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--color-gray-700);
    text-decoration: none;
    min-width: 56px;
    gap: 2px;
    line-height: 1;
    padding-top: 6px;
    padding-bottom: 6px;
}

.mobile-bottom-nav a svg { width: 22px; height: 22px; margin-bottom: 2px; }
.mobile-bottom-nav a.active { color: var(--color-primary); font-weight: 600; }

/* ========================================
   SECTIONS
   ======================================== */
.section {
    padding: var(--spacing-4xl) 0;
}

.section__header {
    margin-bottom: var(--spacing-3xl);
}

.section__title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-sm);
}

.section__title-chinese {
    font-family: var(--font-chinese);
    font-size: var(--font-size-2xl);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
}

.section__subtitle-chinese {
    font-family: var(--font-chinese);
    font-size: var(--font-size-base);
    color: var(--color-gray-500);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    position: relative;
    min-height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero--home {
    min-height: 650px;
}

/* Content page heroes - slightly taller than default for important pages */
.hero--featured {
    min-height: 450px;
}

/* Standard content page hero */
.hero--content {
    min-height: 450px;
}

.hero--contact {
    position: relative;
}

.hero--contact .hero__background {
    filter: brightness(1.1) contrast(1.05);
}

/* Custom Badge Styles - Fix contrast issues */
.badge-custom {
    background-color: var(--color-primary) !important;
    color: var(--color-white) !important;
    padding: 0.5rem 1rem;
    font-weight: 500;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    letter-spacing: 0.025em;
    text-transform: uppercase;
}

.hero__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.75) 0%, rgba(30, 58, 138, 0.5) 50%, rgba(200, 16, 46, 0.4) 100%);
    z-index: 2;
}

.hero__overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, transparent 0%, rgba(0, 0, 0, 0.2) 100%);
    z-index: 1;
}

.hero__content {
    position: relative;
    z-index: 3;
    color: var(--color-white);
}

.hero__title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: #ffffff;
    /* 简洁但有效的阴影 */
    text-shadow:
        0 2px 12px rgba(0, 0, 0, 0.6),
        0 4px 20px rgba(0, 0, 0, 0.4);
    letter-spacing: -0.5px;
    line-height: 1.1;
}

.hero__title-main {
    display: block;
    color: #ffffff;
    font-weight: 700;
}

.hero__title-chinese {
    display: block;
    font-family: var(--font-chinese);
    font-size: var(--font-size-4xl);
    margin-top: var(--spacing-md);
    color: #ffffff;
    opacity: 0.95;
    font-weight: 600;
    letter-spacing: 1px;
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.95);
    text-shadow:
        0 1px 6px rgba(0, 0, 0, 0.5),
        0 2px 10px rgba(0, 0, 0, 0.3);
    font-weight: 400;
    letter-spacing: 0.2px;
    line-height: 1.5;
}

.hero__subtitle-chinese {
    font-family: var(--font-chinese);
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    text-shadow:
        0 1px 6px rgba(0, 0, 0, 0.5),
        0 2px 10px rgba(0, 0, 0, 0.3);
    font-weight: 400;
    letter-spacing: 0.5px;
    line-height: 1.6;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-block {
    display: block;
    width: 100%;
}

.w-100 { width: 100%; }

.cta-buttons {
    margin-top: var(--spacing-2xl);
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   CARDS
   ======================================== */
.course-card,
.team-card,
.value-card,
.contact-info-card,
.faq-item {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    overflow: hidden;
}

.contact-info-card {
    padding: var(--spacing-2xl) var(--spacing-lg);
    border: 1px solid rgba(30, 58, 138, 0.08);
}

.course-card:hover,
.team-card:hover,
.value-card:hover,
.contact-info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* Course Card */
.course-card {
    position: relative;
}

.course-card--featured {
    border: 2px solid var(--color-primary);
}

.course-card__featured-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
    z-index: 10;
}

.course-card__image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.course-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.course-card:hover .course-card__image img {
    transform: scale(1.05);
}

.course-card__badge {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
}

.course-card__content {
    padding: var(--spacing-lg);
}

.course-card__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.course-card__description {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.course-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-200);
}

.course-card__price {
    font-weight: 700;
    color: var(--color-primary);
    font-size: var(--font-size-lg);
}

.course-card__duration {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
}

/* Team Card */
.team-card__image {
    height: 300px;
    overflow: hidden;
}

.team-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.team-card__content {
    padding: var(--spacing-lg);
}

.team-card__name {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
}

.team-card__name-chinese {
    font-family: var(--font-chinese);
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
}

.team-card__title {
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.team-card__title-chinese {
    font-family: var(--font-chinese);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-md);
}

.team-card__bio,
.team-card__qualifications,
.team-card__specializations {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-200);
}

.team-card__bio h5,
.team-card__qualifications h5,
.team-card__specializations h5 {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-xs);
}

.team-card__contact {
    margin-top: var(--spacing-md);
}

.team-card__email {
    color: var(--color-primary);
    text-decoration: none;
}

.team-card__email:hover {
    text-decoration: underline;
}

/* Value Card */
.value-card {
    padding: var(--spacing-xl);
    text-align: center;
    height: 100%;
}

.value-card__icon {
    font-size: var(--font-size-4xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.value-card__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
}

.value-card__title-chinese {
    font-family: var(--font-chinese);
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.value-card__text,
.value-card__text-chinese {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.value-card__text-chinese {
    font-family: var(--font-chinese);
    margin-top: var(--spacing-sm);
}

/* Contact Info Card */
.contact-info-card {
    padding: var(--spacing-xl);
    text-align: center;
    height: 100%;
}

.contact-info-card__icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary), #C8102E);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: var(--font-size-2xl);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(30, 58, 138, 0.2);
    transition: all var(--transition-base);
}

.contact-info-card:hover .contact-info-card__icon {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(30, 58, 138, 0.3);
}

.contact-info-card__title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.contact-info-card__title-chinese {
    font-family: var(--font-chinese);
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.contact-info-card__text {
    color: var(--color-gray-600);
    line-height: 1.8;
}

.contact-info-card__text-chinese {
    font-family: var(--font-chinese);
    color: var(--color-gray-500);
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.contact-info-card__link {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
}

.contact-info-card__link:hover {
    text-decoration: underline;
}

/* ========================================
   TIMELINE
   ======================================== */
.timeline {
    position: relative;
    padding: var(--spacing-xl) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-gray-300);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
    display: flex;
    align-items: center;
}

.timeline-item__year {
    flex: 0 0 120px;
    text-align: right;
    padding-right: var(--spacing-xl);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
}

.timeline-item__content {
    flex: 1;
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-left: var(--spacing-xl);
}

.timeline-item__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.timeline-item__text,
.timeline-item__text-chinese {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
}

.timeline-item__text-chinese {
    font-family: var(--font-chinese);
}

/* ========================================
   STATS
   ======================================== */
.stat-card__number {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.stat-card__label,
.stat-card__label-chinese {
    font-size: var(--font-size-base);
}

.stat-card__label-chinese {
    font-family: var(--font-chinese);
    opacity: 0.9;
}

/* ========================================
   PARTNERSHIP
   ======================================== */
.partnership-image img {
    width: 100%;
    border-radius: var(--radius-lg);
}

.partnership-content__subtitle,
.partnership-content__subtitle-chinese {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.partnership-content__subtitle-chinese {
    font-family: var(--font-chinese);
    color: var(--color-gray-600);
}

.partnership-content__text,
.partnership-content__text-chinese {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.partnership-content__text-chinese {
    font-family: var(--font-chinese);
}

.partnership-content__list {
    list-style-position: inside;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.partnership-content__list li {
    padding: var(--spacing-xs) 0;
}

/* ========================================
   MISSION & VISION
   ======================================== */
.mission-content__text,
.mission-content__text-chinese {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.mission-content__text-chinese {
    font-family: var(--font-chinese);
}

/* ========================================
   FORMS
   ======================================== */
.contact-form-wrapper {
    background: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-700);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.1);
}

.form-check {
    display: flex;
    align-items: flex-start;
}

.form-check-input {
    margin-right: var(--spacing-sm);
    margin-top: 4px;
}

.form-check-label {
    font-weight: normal;
    color: var(--color-gray-600);
}

.form-note {
    margin-top: var(--spacing-md);
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

/* Alerts */
.alert {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #3b82f6;
}

/* ========================================
   MAP & DIRECTIONS
   ======================================== */
.map-container {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.directions {
    margin-top: var(--spacing-lg);
}

.directions h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.directions-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.directions-item:last-child {
    border-bottom: none;
}

.directions-item i {
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    width: 24px;
}

/* ========================================
   QUICK LINKS
   ======================================== */
.quick-links {
    background: var(--color-gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
}

.quick-links h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.quick-links__list {
    list-style: none;
}

.quick-links__list li {
    margin-bottom: var(--spacing-sm);
}

.quick-links__list a {
    color: var(--color-gray-700);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: color var(--transition-fast);
}

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

.quick-links__list i {
    font-size: var(--font-size-xs);
}

/* ========================================
   FAQ
   ======================================== */
.faq-item {
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.faq-item__question {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.faq-item__question i {
    color: var(--color-primary);
}

.faq-item__answer,
.faq-item__answer-chinese {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
}

.faq-item__answer-chinese {
    font-family: var(--font-chinese);
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.img-fluid {
    max-width: 100%;
    height: auto;
}

.rounded {
    border-radius: var(--radius-lg);
}

.shadow {
    box-shadow: var(--shadow-md);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 992px) {
    .col-lg-3,
    .col-lg-4,
    .col-lg-6,
    .col-lg-8,
    .col-lg-12 {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .hero__title {
        font-size: var(--font-size-4xl);
    }

    .hero__title-chinese {
        font-size: var(--font-size-2xl);
    }

    .section__title {
        font-size: var(--font-size-3xl);
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 60px;
    }

    .timeline-item__year {
        position: absolute;
        left: 0;
        top: 0;
        text-align: left;
        padding-right: 0;
    }

    .timeline-item__content {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .col-md-6 {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .hero {
        min-height: 400px;
    }

    .hero--home {
        min-height: 500px;
    }

    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-buttons .btn {
        width: 100%;
    }
    .mobile-only-wrapper { display: block; }
    .mobile-menu-toggle { display: none; }
    .mobile-menu { display: none; }
}

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

    .section {
        padding: var(--spacing-3xl) 0;
    }

    .hero__title {
        font-size: var(--font-size-2xl);
    }

    .section__title {
        font-size: var(--font-size-2xl);
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .hero,
    .cta-buttons,
    .btn {
        display: none;
    }
}

@media (max-width: 992px) {
    .top-bar .container {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .top-bar-left,
    .top-bar-right {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .header-content {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .header-logo img {
        height: 48px;
    }
}

@media (max-width: 768px) {
    .col-md-4,
    .col-md-6,
    .col-md-12 {
        flex: 0 0 100%;
        max-width: 100%;
    }

    /* 隐藏顶部信息栏 */
    .top-bar {
        display: none;
    }

    /* 隐藏桌面导航 */
    .desktop-nav {
        display: none !important;
    }

    .mobile-menu-toggle {
        display: none !important;
    }

    /* 优化头部内容布局 */
    .main-header {
        padding: var(--spacing-sm) 0;
    }

    .header-content {
        justify-content: space-between;
    }

    /* 隐藏头部操作按钮（搜索等） */
    .header-actions {
        display: none;
    }

    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .header-logo a {
        justify-content: flex-start;
    }

    .header-logo img {
        height: 40px;
    }

    .logo-text {
        display: none;
    }

    .mobile-menu { display: none !important; }
    .mobile-bottom-nav { display: none !important; }
    .main-content { padding-bottom: 0; }
}

@media (max-width: 767px) {
    .hero-slide-content { padding: 1.5rem; }
    .service-block { height: 280px; }
    .partner-logos { gap: 1rem; flex-wrap: wrap; justify-content: center; }
}
.mobile-only-wrapper { display: none; margin-left: auto; }
.mobile-only-toggle { display: flex; flex-direction: column; justify-content: space-around; width: 40px; height: 40px; background: var(--color-white); border: 1px solid var(--color-gray-200); border-radius: var(--radius-md); cursor: pointer; padding: 8px; }
.mobile-only-nav { border-top: 1px solid var(--color-gray-200); background: var(--color-white); }
.mobile-only-menu { list-style: none; padding: var(--spacing-sm) 0; margin: 0; }
.mobile-only-item { border-bottom: 1px solid var(--color-gray-100); }
.mobile-only-link { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: var(--spacing-md) var(--spacing-xl); background: none; border: none; text-align: left; font-weight: 500; color: var(--color-gray-700); }
.mobile-only-link:hover { background: var(--color-gray-50); color: var(--color-primary); }
.mobile-only-sub { background: var(--color-gray-50); }
.mobile-only-sub-link { display: block; padding: var(--spacing-sm) var(--spacing-xl) var(--spacing-sm) calc(var(--spacing-xl) * 2); color: var(--color-gray-600); text-decoration: none; }
.mobile-only-sub-link:hover { color: var(--color-primary); }
.toggle-icon { transition: transform var(--transition-fast); }
.max-h-0 { max-height: 0; }
.max-h-96 { max-height: 24rem; }
.max-h-menu { max-height: 90vh; }

@media (max-width: 768px) {
  .mobile-only-wrapper { display: flex; align-items: center; }
}