/* ============================
   世云教育 - 官网首页样式
   ============================ */

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

:root {
    --color-primary: #0f3a5f;
    --color-primary-dark: #082742;
    --color-primary-light: #1a5d8e;
    --color-accent: #d4a843;
    --color-accent-light: #e8c878;
    --color-text: #2a2a2a;
    --color-text-light: #6a6a6a;
    --color-bg: #ffffff;
    --color-bg-alt: #f6f8fb;
    --color-border: #e2e8f0;
    --shadow-sm: 0 2px 8px rgba(15, 58, 95, 0.08);
    --shadow-md: 0 8px 30px rgba(15, 58, 95, 0.12);
    --shadow-lg: 0 20px 60px rgba(15, 58, 95, 0.15);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.8;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 1px;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 4px 15px rgba(212, 168, 67, 0.4);
}

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(212, 168, 67, 0.5);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    transform: translateY(-3px);
}

.btn-lg {
    padding: 18px 48px;
    font-size: 1.05rem;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 20px 0;
}

.navbar.scrolled {
    background: rgba(8, 39, 66, 0.95);
    backdrop-filter: blur(10px);
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    color: #fff;
    font-family: 'Noto Serif SC', serif;
    font-size: 1.5rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.logo-cn {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
}

.logo-en {
    font-size: 0.6rem;
    letter-spacing: 1.5px;
    color: rgba(255, 255, 255, 0.6);
}

.nav-menu {
    display: flex;
    gap: 36px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    font-weight: 400;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 28px;
    height: 2px;
    background: #fff;
    transition: var(--transition);
    border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 640px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #082742 0%, #0f3a5f 40%, #1a5d8e 100%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(212, 168, 67, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(26, 93, 142, 0.3) 0%, transparent 50%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cpath d='M40 0L0 40l40 40 40-40z' fill='none' stroke='%23ffffff' stroke-width='0.5' opacity='0.03'/%3E%3C/svg%3E");
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(8, 39, 66, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 0 24px;
    max-width: 900px;
}

.hero-subtitle {
    font-size: 1rem;
    letter-spacing: 3px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 24px;
}

.hero-title {
    font-family: 'Noto Serif SC', serif;
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(180deg, #ffffff 0%, #e8c878 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 8px;
}

.hero-slogan {
    font-size: 1.3rem;
    font-weight: 300;
    letter-spacing: 4px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 8px;
}

.hero-slogan-en {
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    letter-spacing: 2px;
}

.scroll-line {
    width: 1px;
    height: 50px;
    margin: 12px auto 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.5), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, transparent, var(--color-accent));
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { top: -100%; }
    100% { top: 100%; }
}

/* ===== 通用 Section ===== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-num {
    display: inline-block;
    font-family: 'Noto Serif SC', serif;
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-accent);
    opacity: 0.15;
    line-height: 1;
    margin-bottom: -20px;
}

.section-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-primary);
    position: relative;
    z-index: 1;
}

.section-title-en {
    font-size: 0.75rem;
    letter-spacing: 3px;
    color: var(--color-text-light);
    margin-top: 8px;
}

/* ===== 关于我们 ===== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-lead {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
    line-height: 1.5;
}

.about-text p {
    margin-bottom: 18px;
    color: var(--color-text-light);
    font-size: 1rem;
}

.about-scope {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.scope-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 28px;
    text-align: center;
    position: relative;
    padding-bottom: 16px;
}

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

.scope-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.scope-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px 16px;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: default;
}

.scope-item:hover {
    background: var(--color-bg-alt);
    transform: translateY(-5px);
}

.scope-icon {
    width: 56px;
    height: 56px;
    color: var(--color-primary-light);
    margin-bottom: 14px;
    transition: var(--transition);
}

.scope-item:hover .scope-icon {
    color: var(--color-accent);
}

.scope-icon svg {
    width: 100%;
    height: 100%;
}

.scope-item span {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-text);
}

/* ===== 教育服务流程 ===== */
.services-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.services-intro p {
    color: var(--color-text-light);
    font-size: 1.05rem;
}

.services-flow {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.flow-item {
    flex: 1;
    min-width: 200px;
    max-width: 260px;
    text-align: center;
    padding: 36px 20px;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

.flow-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
}

.flow-circle {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.flow-circle svg {
    width: 36px;
    height: 36px;
}

.flow-item:hover .flow-circle {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    transform: scale(1.1);
}

.flow-item h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.flow-item p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.flow-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    font-size: 1.5rem;
    color: var(--color-accent);
    font-weight: 300;
}

/* ===== 北鲲留学 ===== */
.beikun-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.beikun-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 50px 40px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-top: 4px solid transparent;
    position: relative;
    overflow: hidden;
}

.beikun-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.beikun-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.card-icon-wrap {
    width: 64px;
    height: 64px;
    color: var(--color-primary-light);
    margin-bottom: 24px;
    transition: var(--transition);
}

.beikun-card:hover .card-icon-wrap {
    color: var(--color-accent);
    transform: scale(1.1);
}

.card-icon-wrap svg {
    width: 100%;
    height: 100%;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.card-text {
    color: var(--color-text-light);
    font-size: 1rem;
    line-height: 1.9;
}

/* ===== 就业服务 ===== */
.career-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.stat-item {
    text-align: center;
    padding: 36px 16px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-num {
    display: block;
    font-family: 'Noto Serif SC', serif;
    font-size: 2.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 12px;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.career-intro {
    max-width: 900px;
    margin: 0 auto 60px;
    text-align: center;
    padding: 40px;
    background: #fff;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-accent);
    box-shadow: var(--shadow-sm);
}

.career-intro p {
    font-size: 1.02rem;
    color: var(--color-text-light);
    line-height: 2;
}

.career-center {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.center-left {
    padding: 48px;
}

.center-left h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 18px;
}

.center-left p {
    color: var(--color-text-light);
    margin-bottom: 28px;
    line-height: 1.9;
}

.center-method h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.center-method p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.center-right {
    padding: 48px;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: #fff;
}

.center-right h4 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 28px;
    position: relative;
    padding-bottom: 14px;
}

.center-right h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
}

.highlights li {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 0;
    font-size: 1.02rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.highlights li:last-child {
    border-bottom: none;
}

.highlight-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
    flex-shrink: 0;
    box-shadow: 0 0 12px rgba(212, 168, 67, 0.6);
}

/* ===== CTA 横幅 ===== */
.cta-banner {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Ccircle cx='30' cy='30' r='1' fill='%23ffffff' opacity='0.05'/%3E%3C/svg%3E");
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-family: 'Noto Serif SC', serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    letter-spacing: 3px;
}

.cta-content p {
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 36px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 70px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.8;
    max-width: 380px;
}

.footer-brand .logo-cn {
    color: #fff;
}

.footer-contact h4,
.footer-qr h4 {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 22px;
}

.footer-contact ul li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.contact-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--color-accent);
}

.qr-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.qr-placeholder svg {
    width: 100px;
    height: 100px;
    color: rgba(255, 255, 255, 0.85);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 8px;
}

.qr-placeholder span {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 0.5px;
}

.footer-beian {
    margin-top: 8px;
}

.footer-beian a {
    color: rgba(255, 255, 255, 0.4);
    transition: var(--transition);
}

.footer-beian a:hover {
    color: var(--color-accent);
}

/* ===== 动画 ===== */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    animation: fadeUp 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 968px) {
    .about-content,
    .beikun-grid,
    .career-center {
        grid-template-columns: 1fr;
    }

    .career-stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-brand {
        grid-column: 1 / -1;
    }

    .services-flow {
        flex-direction: column;
        align-items: center;
    }

    .flow-arrow {
        transform: rotate(90deg);
        height: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(8, 39, 66, 0.98);
        backdrop-filter: blur(15px);
        flex-direction: column;
        justify-content: center;
        gap: 30px;
        transition: right 0.4s ease;
        padding: 40px;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .section {
        padding: 70px 0;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .hero-title {
        letter-spacing: 4px;
    }

    .hero-slogan {
        font-size: 1.05rem;
        letter-spacing: 2px;
    }

    .career-stats {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .stat-num {
        font-size: 2rem;
    }

    .scope-grid {
        grid-template-columns: 1fr;
    }

    .center-left,
    .center-right {
        padding: 32px 24px;
    }

    .cta-content h2 {
        font-size: 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .career-intro {
        padding: 28px 20px;
    }

    .about-scope {
        padding: 28px 20px;
    }
}

@media (max-width: 480px) {
    .career-stats {
        grid-template-columns: 1fr;
    }

    .flow-item {
        width: 100%;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }
}