/**
 * 白驿中学网站 - 主样式表
 * 移动优先 / CSS变量 / 响应式 / 无障碍 / 性能
 */
:root {
  --color-primary: #1a56db;
  --color-primary-dark: #1440a8;
  --color-primary-light: #e8effc;
  --color-accent: #dc2626;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --font-sans: "PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  --space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;
  --radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-full: 9999px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow-md: 0 4px 6px -1px rgba(0,0,0,.1);--shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1);
  --transition-fast: 150ms ease;--transition-base: 250ms ease;--transition-slow: 350ms ease;
  --header-height: 64px;--max-width: 1200px;
}

*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px; }
body { font-family: var(--font-sans); color: var(--color-text); background: var(--color-bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-dark); }
a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }
ul,ol { list-style: none; }

/* 跳过链接 */
.skip-link { position: absolute; top: -100%; left: 50%; transform: translateX(-50%); background: var(--color-primary); color: #fff; padding: var(--space-sm) var(--space-lg); border-radius: 0 0 var(--radius-md) var(--radius-md); z-index: 9999; font-weight: 600; transition: top var(--transition-fast); }
.skip-link:focus { top: 0; }

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

/* 导航 */
header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--color-border); height: var(--header-height); }
.nav-container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-lg); display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: flex; align-items: center; gap: var(--space-sm); font-weight: 700; font-size: 1.125rem; color: var(--color-text); }
.logo svg { flex-shrink: 0; }
.nav-links { display: flex; gap: var(--space-xs); }
.nav-links a { padding: var(--space-sm) var(--space-md); border-radius: var(--radius-md); color: var(--color-text-muted); font-size: .875rem; font-weight: 500; transition: all var(--transition-fast); }
.nav-links a:hover,.nav-links a.active { color: var(--color-primary); background: var(--color-primary-light); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: var(--space-sm); }
.hamburger { display: block; width: 22px; height: 2px; background: var(--color-text); position: relative; transition: background var(--transition-fast); }
.hamburger::before,.hamburger::after { content: ''; position: absolute; width: 22px; height: 2px; background: var(--color-text); left: 0; transition: transform var(--transition-fast); }
.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }

/* 英雄 */
.hero-secondary { position: relative; min-height: 35vh; display: flex; align-items: center; justify-content: center; text-align: center; background: linear-gradient(135deg,#1e3a8a 0%,#0f172a 100%); color: #fff; }
.hero-secondary h2 { font-size: clamp(1.5rem,4vw,2.5rem); font-weight: 800; margin-bottom: var(--space-md); }
.hero-secondary h2::after { display: none; }
.hero-secondary p { opacity: .9; margin-bottom: var(--space-lg); }

/* 按钮 */
.btn { display: inline-block; padding: var(--space-sm) var(--space-xl); border-radius: var(--radius-md); font-weight: 600; font-size: 1rem; cursor: pointer; transition: all var(--transition-fast); border: 2px solid transparent; }
.btn-primary { background: #fff; color: var(--color-primary); }
.btn-primary:hover { background: rgba(255,255,255,.9); transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-outline { border-color: var(--color-primary); color: var(--color-primary); background: transparent; }
.btn-outline:hover { background: var(--color-primary); color: #fff; }

/* 统计 */
.stats { padding: var(--space-2xl) 0; background: var(--color-bg-alt); border-top: 3px solid var(--color-primary); }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--space-lg); text-align: center; }
.stat-number { display: block; font-size: clamp(1.5rem,4vw,2.5rem); font-weight: 800; color: var(--color-primary); }
.stats-grid li span { font-size: .875rem; color: var(--color-text-muted); margin-top: var(--space-xs); display: block; }

/* 通用板块 */
section { padding: var(--space-3xl) 0; }
section:nth-child(even) { background: var(--color-bg-alt); }
h2 { font-size: clamp(1.5rem,3vw,2rem); font-weight: 700; margin-bottom: var(--space-md); color: var(--color-text); position: relative; }
h2::after { content: ''; display: block; width: 60px; height: 3px; background: var(--color-primary); margin-top: var(--space-sm); border-radius: var(--radius-full); }
.section-desc { color: var(--color-text-muted); font-size: 1.0625rem; margin-bottom: var(--space-xl); max-width: 600px; }

/* 卡片 */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); gap: var(--space-lg); }
.card { background: #fff; border-radius: var(--radius-lg); padding: var(--space-xl); box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); transition: all var(--transition-base); }
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: var(--space-sm); color: var(--color-primary); }
.card p { color: var(--color-text-muted); font-size: .9375rem; }

/* 新闻 */
.news-list { display: grid; gap: var(--space-md); }
.news-item { background: #fff; border-radius: var(--radius-md); padding: var(--space-lg); border: 1px solid var(--color-border); display: flex; gap: var(--space-lg); align-items: flex-start; transition: box-shadow var(--transition-fast); }
.news-item:hover { box-shadow: var(--shadow-md); }
.news-item time { min-width: 80px; text-align: center; color: var(--color-primary); font-weight: 700; font-size: .875rem; line-height: 1.3; }
.news-item time span { display: block; font-weight: 400; font-size: .75rem; color: var(--color-text-muted); }
.news-item a { white-space: nowrap; font-size: .875rem; }

/* 教师 */
.teachers-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(160px,1fr)); gap: var(--space-lg); }
.teacher-card { text-align: center; background: #fff; border-radius: var(--radius-lg); padding: var(--space-xl); box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); transition: all var(--transition-base); }
.teacher-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.teacher-avatar { width: 80px; height: 80px; border-radius: var(--radius-full); background: var(--color-primary-light); color: var(--color-primary); font-size: 1.75rem; font-weight: 700; display: flex; align-items: center; justify-content: center; margin: 0 auto var(--space-md); }
.teacher-card h3 { font-size: 1rem; margin-bottom: var(--space-xs); }
.teacher-card p { font-size: .8125rem; color: var(--color-text-muted); }

/* 招生 */
.admissions-content { display: grid; grid-template-columns: 2fr 1fr; gap: var(--space-xl); }
.admissions-info ul,.admissions-info ol { margin: var(--space-md) 0; padding-left: var(--space-lg); list-style: disc; }
.admissions-info ol { list-style: decimal; }
.admissions-info li { margin-bottom: var(--space-sm); color: var(--color-text-muted); }
.admissions-sidebar { background: var(--color-primary-light); border-radius: var(--radius-lg); padding: var(--space-xl); }
.admissions-sidebar ul { margin: var(--space-md) 0; padding-left: var(--space-lg); list-style: disc; }
.admissions-sidebar li { margin-bottom: var(--space-sm); color: var(--color-text-muted); font-size: .9375rem; }

/* 荣誉 */
.honors-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); gap: var(--space-lg); margin-bottom: var(--space-2xl); }
.honor-card { background: #fff; border-radius: var(--radius-lg); padding: var(--space-xl); text-align: center; box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); border-top: 3px solid var(--color-primary); transition: all var(--transition-base); }
.honor-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.honor-year { display: inline-block; background: var(--color-primary-light); color: var(--color-primary); font-size: .75rem; font-weight: 700; padding: 2px 10px; border-radius: var(--radius-full); margin-bottom: var(--space-sm); }
.honor-card h3 { font-size: 1rem; }
.honors-details { display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: var(--space-lg); }
.honor-detail { background: var(--color-bg-alt); border-radius: var(--radius-md); padding: var(--space-lg); }
.honor-detail h4 { font-size: .9375rem; color: var(--color-primary); margin-bottom: var(--space-sm); }
.honor-detail ul { padding-left: var(--space-lg); list-style: disc; }
.honor-detail li { margin-bottom: var(--space-xs); font-size: .875rem; color: var(--color-text-muted); }

/* 校园风光 */
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); gap: var(--space-lg); }
.gallery-placeholder { border-radius: var(--radius-lg); background: var(--color-bg-alt); border: 2px dashed var(--color-border); display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 220px; color: var(--color-text-muted); gap: var(--space-sm); transition: all var(--transition-base); }
.gallery-placeholder:hover { border-color: var(--color-primary); color: var(--color-primary); }
.gallery-placeholder svg { opacity: .4; }
.gallery-placeholder span { font-size: .875rem; }

/* 页脚 */
footer { background: var(--color-text); color: rgba(255,255,255,.8); padding: var(--space-3xl) 0 var(--space-lg); }
.footer-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--space-xl); margin-bottom: var(--space-xl); }
footer h3 { color: #fff; font-size: 1rem; margin-bottom: var(--space-md); }
footer a { color: rgba(255,255,255,.7); }
footer a:hover { color: #fff; }
address { font-style: normal; }
address p { margin-bottom: var(--space-sm); }
.footer-links li { margin-bottom: var(--space-xs); }
.footer-about p { font-size: .9375rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: var(--space-lg); text-align: center; font-size: .8125rem; opacity: .6; }

/* 返回顶部 */
.back-to-top { position: fixed; bottom: var(--space-xl); right: var(--space-xl); width: 44px; height: 44px; border-radius: var(--radius-full); background: var(--color-primary); color: #fff; border: none; font-size: 1.25rem; cursor: pointer; opacity: 0; visibility: hidden; transition: all var(--transition-base); z-index: 50; box-shadow: var(--shadow-md); }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-2px); }

/* 滚动动画 */
.animate-pending { opacity: 0; transform: translateY(20px); transition: opacity var(--transition-slow),transform var(--transition-slow); }
.animate-in { opacity: 1; transform: translateY(0); }

/* 响应式 - 平板 */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: var(--header-height); left: 0; right: 0; background: #fff; flex-direction: column; padding: var(--space-md); box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--color-border); }
  .nav-links.active { display: flex; }
  .stats-grid { grid-template-columns: repeat(2,1fr); }
  .admissions-content { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .hero { min-height: 50vh; }
  .hero-secondary { min-height: 25vh; }
}

/* 响应式 - 手机 */
@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  section { padding: var(--space-xl) 0; }
  .cards-grid,.gallery-grid { grid-template-columns: 1fr; }
  .teachers-grid { grid-template-columns: repeat(2,1fr); }
  .news-item { flex-direction: column; gap: var(--space-sm); }
}

/* 搜索样式 */
.search-container { position: relative; margin-bottom: 2rem; }
.search-input { width: 100%; max-width: 500px; padding: 0.75rem 1rem 0.75rem 2.5rem; border: 2px solid var(--color-border); border-radius: var(--radius-md); font-size: 1rem; outline: none; transition: border-color 0.2s, box-shadow 0.2s; background: var(--color-bg); color: var(--color-text); }
.search-input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(26,86,219,0.15); }
.search-icon { position: absolute; left: 0.75rem; top: 50%; transform: translateY(-50%); width: 20px; height: 20px; fill: var(--color-text-muted); }
.search-results { margin-top: 1rem; display: none; max-width: 500px; }
.search-results.active { display: block; }
.search-item { padding: 1rem; background: var(--color-bg-alt); border-radius: var(--radius-md); margin-bottom: 0.75rem; border-left: 3px solid var(--color-primary); }
.search-item h4 { margin: 0 0 0.5rem 0; font-size: 1rem; color: var(--color-text); }
.search-item p { margin: 0; font-size: 0.9rem; color: var(--color-text-muted); }
.search-item a { color: var(--color-primary); text-decoration: none; }
.search-item a:hover { text-decoration: underline; }
.search-item .type { display: inline-block; padding: 0.2rem 0.5rem; background: var(--color-border); border-radius: var(--radius-sm); font-size: 0.75rem; margin-bottom: 0.5rem; color: var(--color-text); }
.search-no-results { padding: 1rem; color: var(--color-text-muted); font-style: italic; }

/* 搜索高亮 */
.search-item mark { background: rgba(255, 230, 0, 0.4); color: inherit; padding: 0 2px; border-radius: 2px; }

/* 分页 */
.pagination { display: flex; gap: 0.5rem; align-items: center; justify-content: center; margin: 2rem 0; flex-wrap: wrap; }
.pagination a { padding: 0.5rem 1rem; background: var(--color-bg-alt); border: 1px solid var(--color-border); border-radius: var(--radius-sm); color: var(--color-text); text-decoration: none; transition: all 0.2s; }
.pagination a:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.pagination-current { padding: 0.5rem 1rem; background: var(--color-primary); color: #fff; border-radius: var(--radius-sm); font-weight: bold; }
@media (prefers-color-scheme: dark) {
  .pagination a { background: #2a2a2a; border-color: #444; color: var(--color-text); }
  .pagination a:hover { color: #fff; }
}

/* 打印 */
@media print {
  header,.back-to-top,.nav-toggle { display: none !important; }
  .hero { min-height: auto; padding: var(--space-lg); }
  body { color: #000; background: #fff; }
  a { color: #000; text-decoration: underline; }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .animate-pending { opacity: 1; transform: none; }
}