/* ===== 全局重置与变量 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #1a365d;
    --primary-light: #2c5282;
    --primary-dark: #0f2440;
    --accent: #d4a843;
    --accent-light: #e8c56a;
    --text: #2d3748;
    --text-light: #718096;
    --text-lighter: #a0aec0;
    --bg: #ffffff;
    --bg-gray: #f7fafc;
    --bg-dark: #0f2440;
    --border: #e2e8f0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
}
.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-block { width: 100%; }

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

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

/* ===== 顶部导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}
.site-header.scrolled {
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
}
.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 800;
    letter-spacing: -0.5px;
}
.logo img { width: 42px; height: 42px; border-radius: 10px; object-fit: cover; }
.logo-text {
    font-size: 18px;
    color: var(--primary);
    letter-spacing: 0.5px;
}

.main-nav {
    display: flex;
    gap: 32px;
}
.main-nav a {
    font-size: 15px;
    color: var(--text);
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}
.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}
.main-nav a:hover { color: var(--primary); }
.main-nav a:hover::after { width: 100%; }

.header-actions {
    display: flex;
    gap: 12px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.mobile-nav {
    display: none;
    flex-direction: column;
    padding: 16px 24px;
    background: #fff;
    border-top: 1px solid var(--border);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
    padding: 12px 0;
    font-size: 16px;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}
.mobile-nav-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 16px;
}

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 72px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    z-index: 0;
}
.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(212,168,67,0.1) 0%, transparent 50%);
}
.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(15,36,64,0.3) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50px;
    font-size: 14px;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.8s ease;
}
.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: 2px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: rgba(255,255,255,0.85);
    margin-bottom: 48px;
    letter-spacing: 1px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.btn-hero {
    padding: 18px 36px;
    font-size: 17px;
    border-radius: 60px;
    position: relative;
    overflow: hidden;
}
.btn-hero .btn-icon { font-size: 20px; }
.btn-hero .btn-arrow {
    transition: var(--transition);
    font-size: 18px;
}
.btn-hero:hover .btn-arrow { transform: translateX(4px); }

.btn-register {
    background: var(--accent);
    color: var(--primary-dark);
    box-shadow: 0 8px 30px rgba(212,168,67,0.4);
}
.btn-register:hover {
    background: var(--accent-light);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(212,168,67,0.5);
}

.btn-query {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border: 2px solid rgba(255,255,255,0.4);
    backdrop-filter: blur(10px);
}
.btn-query:hover {
    background: rgba(255,255,255,0.25);
    border-color: #fff;
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    animation: fadeInUp 0.8s ease 0.4s both;
}
.stat-item { text-align: center; }
.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}
.stat-label {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-top: 8px;
}
.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.2);
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.6);
    font-size: 12px;
    letter-spacing: 2px;
}
.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
    animation: scrollLine 2s infinite;
}

/* ===== 通用 Section ===== */
.section {
    padding: 100px 0;
}
.section-gray { background: var(--bg-gray); }

.section-header {
    text-align: center;
    margin-bottom: 64px;
}
.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--accent);
    margin-bottom: 16px;
}
.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 20px;
    letter-spacing: 1px;
}
.section-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    margin: 0 auto;
    border-radius: 2px;
}

/* ===== 关于我们 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}
.about-desc {
    font-size: 16px;
    color: var(--text-light);
    line-height: 2;
    margin-bottom: 32px;
}
.about-points {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.point-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--text);
    font-weight: 500;
}
.point-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.about-visual {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.visual-card {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    padding: 40px 28px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}
.visual-card-small {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: var(--primary-dark);
    margin-top: 40px;
}
.visual-icon {
    font-size: 48px;
    margin-bottom: 16px;
}
.visual-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
    font-weight: 700;
}
.visual-card p {
    font-size: 14px;
    opacity: 0.85;
}

/* ===== 测评流程 ===== */
.process { background: var(--bg-gray); }

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}
.step-card {
    background: #fff;
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    text-align: center;
    position: relative;
    transition: var(--transition);
    border: 1px solid var(--border);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}
.step-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}
.step-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 16px;
}
.step-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}
.step-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}
.step-connector {
    position: absolute;
    right: -18px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 24px;
    color: var(--accent);
    z-index: 1;
}

/* ===== 测评优势 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-card {
    background: #fff;
    padding: 40px 28px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}
.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
}
.feature-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto 24px;
    transition: var(--transition);
}
.feature-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}
.feature-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== 双入口 CTA ===== */
.cta-section {
    padding: 80px 0;
    background: var(--bg-gray);
}
.cta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}
.cta-card {
    display: block;
    padding: 48px;
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    color: #fff;
}
.cta-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.cta-register {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
}
.cta-query {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: var(--primary-dark);
}
.cta-icon-wrap {
    width: 72px;
    height: 72px;
    background: rgba(255,255,255,0.15);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}
.cta-query .cta-icon-wrap { background: rgba(255,255,255,0.3); }
.cta-icon { font-size: 32px; }
.cta-title {
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 12px;
}
.cta-desc {
    font-size: 15px;
    opacity: 0.85;
    margin-bottom: 24px;
    line-height: 1.7;
}
.cta-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
}
.cta-link em {
    font-style: normal;
    transition: var(--transition);
}
.cta-card:hover .cta-link em { transform: translateX(6px); }

/* ===== 通知公告 ===== */
.news { background: var(--bg-gray); }
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-card {
    display: flex;
    gap: 20px;
    background: #fff;
    padding: 28px;
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid var(--border);
}
.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}
.news-date {
    flex-shrink: 0;
    width: 64px;
    text-align: center;
    padding: 12px 8px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    border-radius: 10px;
}
.news-day {
    display: block;
    font-size: 24px;
    font-weight: 800;
    line-height: 1;
}
.news-month {
    display: block;
    font-size: 11px;
    opacity: 0.8;
    margin-top: 4px;
}
.news-content { flex: 1; min-width: 0; }
.news-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-summary {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.empty-state {
    text-align: center;
    padding: 60px;
    color: var(--text-lighter);
    font-size: 16px;
}

/* ===== 页脚 ===== */
.site-footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 64px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}
.footer-logo .logo-icon {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: var(--primary-dark);
}
.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255,255,255,0.6);
}
.footer-col h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 20px;
    font-weight: 700;
}
.footer-col ul li {
    margin-bottom: 12px;
}
.footer-col ul li a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
}
.footer-col ul li a:hover {
    color: var(--accent);
    padding-left: 4px;
}
.contact-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}
.contact-icon { font-size: 16px; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}
.footer-bottom p { margin-bottom: 4px; }

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.back-to-top:hover {
    background: var(--accent);
    color: var(--primary-dark);
    transform: translateY(-4px);
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .steps-grid, .features-grid { grid-template-columns: repeat(2, 1fr); }
    .step-connector { display: none; }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .main-nav, .header-actions { display: none; }
    .mobile-menu-btn { display: flex; }
    .hero { min-height: auto; padding: 120px 0 80px; }
    .hero-actions { flex-direction: column; align-items: center; }
    .btn-hero { width: 100%; max-width: 320px; }
    .hero-stats { gap: 24px; flex-wrap: wrap; }
    .stat-divider { display: none; }
    .steps-grid, .features-grid, .news-grid, .cta-grid { grid-template-columns: 1fr; }
    .about-points { grid-template-columns: 1fr; }
    .about-visual { grid-template-columns: 1fr; }
    .visual-card-small { margin-top: 0; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .cta-card { padding: 32px; }
    .hero-scroll { display: none; }
}