/*
Theme Name: [中文版]WSSB - Wall Street Business School
Theme URI: https://www.wssb.us
Author: WSSB Development Team
Author URI: https://www.wssb.us
Description: Official WordPress theme for Wall Street School of Business (WSSB) - 华尔街商学院官方主题
Version: 1.0.0
Requires at least: 5.8
Tested up to: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: wssb
Tags: business, education, school, responsive, custom-colors, custom-menu, featured-images
*/

/* ============================================
   CSS Variables
   ============================================ */
:root {
    --color-primary: #0a1628;
    --color-primary-light: #1a2f52;
    --color-gold: #c9a84c;
    --color-gold-light: #e8d5a3;
    --color-gold-dark: #a8893a;
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-light-gray: #f0f0f0;
    --color-mid-gray: #999999;
    --color-dark-gray: #555555;
    --color-text: #2c2c2c;
    --color-text-light: #666666;
    --color-border: #e0e0e0;
    --color-overlay: rgba(10, 22, 40, 0.75);

    --font-serif: 'Playfair Display', 'Noto Serif SC', Georgia, 'Times New Roman', serif;
    --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
    --shadow-gold: 0 4px 20px rgba(201,168,76,0.3);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    --transition: all 0.3s ease;
    --max-width: 1200px;
    --header-height: 80px;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    line-height: 1.3;
    color: var(--color-primary);
}

p {
    margin-bottom: 1rem;
}

p:last-child {
    margin-bottom: 0;
}

/* ============================================
   Layout Utilities
   ============================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
}

.section-sm {
    padding: 50px 0;
}

.section-lg {
    padding: 120px 0;
}

.section-dark {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
    color: var(--color-white);
}

.section-gold {
    background-color: var(--color-gold);
    color: var(--color-primary);
}

.section-light {
    background-color: var(--color-off-white);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.gap-4 { gap: 32px; }

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ============================================
   Section Headers
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(1.8rem, 3vw, 2.8rem);
    font-family: var(--font-serif);
    color: var(--color-primary);
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-dark .section-title {
    color: var(--color-white);
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-light);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.8;
}

.section-dark .section-subtitle {
    color: rgba(255,255,255,0.75);
}

.section-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
    margin: 20px auto 0;
    border-radius: 2px;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    color: var(--color-primary);
    border-color: var(--color-gold);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-gold-dark), #8a6e2a);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
}

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

.btn-outline:hover {
    background: var(--color-white);
    color: var(--color-primary);
    transform: translateY(-2px);
}

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

.btn-outline-gold:hover {
    background: var(--color-gold);
    color: var(--color-primary);
    transform: translateY(-2px);
}

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

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

.btn-lg {
    padding: 18px 44px;
    font-size: 1.05rem;
}

.btn-sm {
    padding: 10px 22px;
    font-size: 0.875rem;
}

/* ============================================
   Header & Navigation
   ============================================ */
#site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(201, 168, 76, 0.2);
    transition: var(--transition);
}

#site-header.scrolled {
    background: rgba(10, 22, 40, 0.98);
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-emblem {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

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

.logo-name {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.2;
    letter-spacing: 0.02em;
}

.logo-tagline {
    font-size: 0.65rem;
    color: var(--color-gold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    line-height: 1;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-nav a {
    display: block;
    padding: 8px 14px;
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-gold);
    background: rgba(201, 168, 76, 0.1);
}

.nav-cta {
    margin-left: 12px;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background-color: var(--color-primary);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(135deg, rgba(10,22,40,0.92) 0%, rgba(26,47,82,0.85) 50%, rgba(10,22,40,0.9) 100%),
        url('assets/images/hero-bg.jpg') center/cover no-repeat;
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(201,168,76,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(201,168,76,0.06) 0%, transparent 40%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 120px 24px 80px;
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(201,168,76,0.15);
    border: 1px solid rgba(201,168,76,0.4);
    color: var(--color-gold);
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 28px;
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-gold);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.15;
    margin-bottom: 12px;
    max-width: 800px;
}

.hero-title .gold {
    color: var(--color-gold);
    display: block;
}

.hero-subtitle-en {
    font-family: var(--font-serif);
    font-size: clamp(1rem, 2vw, 1.4rem);
    color: rgba(255,255,255,0.6);
    font-style: italic;
    margin-bottom: 24px;
    letter-spacing: 0.05em;
}

.hero-description {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.8);
    max-width: 580px;
    line-height: 1.9;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 48px;
    flex-wrap: wrap;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.hero-stat {
    display: flex;
    flex-direction: column;
}

.hero-stat-number {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
    margin-bottom: 4px;
}

.hero-stat-label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.6);
    letter-spacing: 0.05em;
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.5);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: bounce 2s infinite;
}

.hero-scroll::after {
    content: '';
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================
   About Preview Section
   ============================================ */
.about-preview {
    padding: 100px 0;
    background: var(--color-white);
}

.about-preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-preview-image {
    position: relative;
}

.about-preview-image .img-frame {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
}

.about-preview-image .img-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Additional styles in assets/css/main.css */