:root {
  --ink: #16253a;
  --muted: #65748a;
  --line: #dce3eb;
  --soft: #f4f7fa;
  --paper: #ffffff;
  --navy: #15365f;
  --ocean: #2d6cdf;
  --frontier: #c0392b;
  --open: #00a676;
  --gold: #d7a63b;
  --shadow: 0 12px 34px rgba(25, 45, 75, .09);
  --radius: 6px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, select { font: inherit; }
button { cursor: pointer; }
/* shell 加宽到 1360px，能容纳 section-head + 内容，整体在 viewport 内 margin auto 居中 */
.shell { width: min(1520px, calc(100% - 40px)); margin: 0 auto; position: relative; }
/* shell-flex：横向排列，section-head 在左、内容在右，section-head 垂直居中于 shell 高度 */
.shell.shell-flex { display: flex; align-items: center; gap: 24px; }
/* 限制首页左侧标题区块的固定宽度为 125px，以便配合 2 字一行的纵向卡片效果 */
.shell.shell-flex > .section-head { flex: 0 0 125px; }
.shell.shell-flex > .section { flex: 1; min-width: 0; }
.section { padding: 8px 0; }
.section.alt { background: var(--soft); }


/* section-head：通用普通标题块（其他页面 theme/about/partners/course-detail 使用）
   横向 flex：标题块在左、可选的 text-link 在右，与标题同一行垂直居中 */
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 0 0 16px; text-align: left; }
.section-head .eyebrow { margin: 0 0 8px; font-size: 13px; font-weight: 800; letter-spacing: 1px; color: var(--ocean); }
.section-head h2 { margin: 0; padding: 0; background: none; color: var(--navy); font-size: 24px; line-height: 1.3; }
.section-head p { max-width: 680px; margin: 8px 0 0; color: var(--muted); }

/* 首页 shell-flex 内的 section-head：重构为带精致科技斜纹底色、微投影的悬浮式卡片，文字居中对齐 */
.shell-flex > .section-head {
  display: flex;
  flex-direction: column;
  align-items: center; /* 从 flex-start 变更为 center，使子元素（h2 与 eyebrow）在卡片内水平居中 */
  gap: 8px;
  margin: 0;
  padding: 18px 14px; /* 调整为水平对称的 padding，确保居中后的视觉对称与完美呼吸感 */
  
  /* 精致底色与 45 度科技斜纹背景纹理融合 */
  background: 
    repeating-linear-gradient(45deg, rgba(45, 108, 223, 0.02) 0px, rgba(45, 108, 223, 0.02) 2px, transparent 2px, transparent 10px), /* 精密斜线条纹 */
    linear-gradient(180deg, #f5f8fc 0%, #edf2f9 100%); /* 浅冷蓝垂直渐变 */
    
  border: 1px solid rgba(45, 108, 223, 0.15); /* 精细边框 */
  border-left: 4px solid var(--ocean); /* 左侧加粗的海洋蓝主题色竖条 */
  border-radius: 8px; /* 圆角设计 */
  box-shadow: 0 4px 12px rgba(25, 45, 75, 0.04); /* 微弱立体感投影 */
}
/* 英文小标题：调整为精致的暗灰蓝色小字体，增强视觉层级，文字水平居中 */
.shell-flex > .section-head .eyebrow {
  margin: 0;
  font-size: 11px;
  letter-spacing: 1.5px;
  color: rgba(21, 54, 95, 0.7);
  font-weight: 750;
  text-align: center; /* 文字水平居中 */
}
/* 中文主标题：利用 HTML 中的 <br> 标签进行精准折行，字号调大至 24px 并且文字居中 */
.shell-flex > .section-head h2 {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 24px; /* 字号从 20px 调大至 24px，突显标题 */
  font-weight: 800; /* 极粗字重 */
  line-height: 1.35; /* 紧凑舒适的行高 */
  letter-spacing: 2px; /* 稍微拉开字距，更具呼吸感 */
  text-align: center; /* 文字水平居中 */
  display: block;
  flex-shrink: 0; /* 防止被 flex 容器挤压变形 */
  color: var(--navy);
}
.shell-flex > .section-head p { margin: 0; }
.text-link { color: var(--ocean); font-weight: 700; white-space: nowrap; }
.eyebrow { margin: 0 0 10px; font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
.muted { color: var(--muted); }
.empty-state { padding: 60px 24px; text-align: center; border: 1px dashed #bdc8d6; color: var(--muted); background: #fff; }

.pagination { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; margin: 32px 0 8px; }
.pagination-link { display: inline-flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; padding: 0 12px; border: 1px solid #d6dde7; border-radius: 6px; background: #fff; color: #1f2d3d; font-size: 14px; text-decoration: none; transition: border-color .15s, color .15s, background .15s; }
.pagination-link:hover { border-color: var(--theme-color, #2d6cdf); color: var(--theme-color, #2d6cdf); }
.pagination-link.on { background: var(--theme-color, #2d6cdf); border-color: var(--theme-color, #2d6cdf); color: #fff; cursor: default; }
.pagination-link.disabled { color: #b8c0cc; border-color: #e7ebf1; cursor: not-allowed; pointer-events: none; background: #f7f9fc; }
.pagination-ellipsis { padding: 0 4px; color: var(--muted); }
.pagination-info { margin-left: 8px; color: var(--muted); font-size: 13px; }

.topbar { position: sticky; top: 0; z-index: 50; height: 72px; border-bottom: 1px solid rgba(20, 43, 70, .12); background: rgba(255, 255, 255, .96); backdrop-filter: blur(12px); }
.nav-shell { width: min(1240px, calc(100% - 32px)); height: 100%; margin: 0 auto; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 11px; min-width: 245px; }
.brand img { width: 44px; height: 44px; object-fit: contain; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.25; }
.brand-copy strong { font-size: 18px; }
.brand-copy small { margin-top: 3px; color: var(--muted); font-size: 12px; }
.nav-links { display: flex; align-items: stretch; justify-content: center; height: 100%; margin-left: auto; }
.nav-links > a, .nav-dropdown > a { position: relative; display: flex; align-items: center; padding: 0 15px; font-size: 16px; font-weight: 650; color: #405169; }
.nav-links > a::after, .nav-dropdown > a::after { content: ""; position: absolute; right: 15px; bottom: 0; left: 15px; height: 3px; transform: scaleX(0); background: var(--ocean); transition: transform .2s; }
.nav-links a:hover, .nav-links a.on { color: var(--ink); }
.nav-links > a:hover::after, .nav-links > a.on::after, .nav-dropdown > a:hover::after, .nav-dropdown > a.on::after { transform: scaleX(1); }
.nav-dropdown { position: relative; display: flex; }
.dropdown-menu { position: absolute; top: 62px; left: 0; min-width: 150px; padding: 8px; visibility: hidden; opacity: 0; transform: translateY(8px); border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); transition: .2s; z-index: 60; }
.dropdown-menu a { display: block; padding: 9px 10px; font-size: 15px; }
.dropdown-menu a:hover { background: var(--soft); }
/* 九业态下拉：三列网格，左边框用主题色标识 */
.dropdown-menu-sectors { left: auto; right: 0; display: grid; grid-template-columns: repeat(3, minmax(140px, 1fr)); gap: 4px; min-width: 480px; }
.dropdown-menu-sectors a { padding: 8px 10px 8px 12px; white-space: nowrap; }
/* 顶部"课程思政志愿库"暂未实现，灰显不可点 */
.nav-links a.disabled { color: #a8b3c3; cursor: not-allowed; }
.nav-links a.disabled:hover { color: #a8b3c3; }
.nav-dropdown:hover .dropdown-menu { visibility: visible; opacity: 1; transform: none; }
.nav-action { padding: 9px 16px; border: 1px solid var(--ocean); color: var(--ocean); font-size: 15px; font-weight: 750; }
.nav-action:hover, .nav-action.current { color: #fff; background: var(--ocean); }
.menu-toggle { display: none; width: 40px; height: 40px; margin-left: auto; padding: 9px; border: 0; background: transparent; }
.menu-toggle span { display: block; height: 2px; margin: 4px 0; background: var(--ink); }

.hero { min-height: 560px; display: flex; align-items: center; color: #fff; background-position: center; background-size: cover; }
/* 首页 Hero 区域：居中大气设计，恢复原有高度 min-height: 260px */
.home-hero {
  /* 视差固定：hero 粘在 topbar 下方不动，下方内容滚动时盖上来 */
  position: sticky;
  top: 72px; /* topbar 高度，避免被固定 topbar 盖住而看不出固定效果 */
  z-index: 0;
  min-height: 260px; /* 恢复原有的 260px 高度 */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 52px 20px 72px; /* 微调 padding 以补偿英文小标题被移除后的空间 */
  overflow: hidden; /* 恢复为裁剪溢出，保持背景图底边界整洁 */
  text-align: center;
  background-image: url('/images/cover-home.png');
  background-position: center 70%;
  background-size: cover;
}
/* 移除了原本的 .home-hero::before 半透明蒙层，保留直接渲染的清晰底图 */
.home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  display: none; /* 彻底关闭背景图遮罩层，保持原图的高清晰度与透光度 */
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1120px;
}
/* 英文小标题：纯白微透 + 加大字间距，作为主标题上方的辅助装饰 */
.hero-eyebrow {
  margin: 0 0 16px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
}
/* 主标题：桌面端字号放大至 40px，统一为纯白色，采用现代无衬线粗体以突显端庄沉稳的科技感 */
.hero-content h1 {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 40px; /* 调整为 40px，既比之前的 34px 大一些，又能在 260px 高度内完美呈现不溢出 */
  font-weight: 800; /* 极粗字重，更具视觉分量 */
  line-height: 1.4;
  letter-spacing: 1px;
  white-space: normal; /* 允许在窄屏上合理折行 */
  color: #ffffff; /* 统一颜色为纯白 */
  /* 采用融入海洋背景主题的多层深蓝色弥散软阴影，在无遮罩背景下提供柔和、高级的白色大字识读对比度，消除了生硬的焦黑感 */
  text-shadow: 
    0 1px 2px rgba(11, 31, 56, 0.75), 
    0 4px 12px rgba(11, 31, 56, 0.5), 
    0 8px 30px rgba(11, 31, 56, 0.35);
}
/* 移除高亮文字的特殊色，使其颜色和字重继承主标题，达成颜色统一的要求 */
.hero-content h1 .hl {
  color: inherit;
  font-weight: inherit;
}
/* 标题下方装饰线：由主题色到白色的渐变长横线，重新微调宽度以配合大标题 */
.hero-divider {
  display: block;
  width: 120px;
  height: 4px;
  margin: 24px auto 0;
  /*background: linear-gradient(90deg, var(--ocean), #ffffff);*/
  /*border-radius: 2px;*/
  /*box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);*/
}
.hero-content > p {
  max-width: 100%;
  margin: 14px 0 18px;
  color: rgba(255, 255, 255, .82);
  font-size: 15px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-actions .button {
  padding: 10px 22px;
  font-size: 14px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid transparent;
  font-weight: 750;
}
.button.primary {
  color: #fff;
  background: var(--ocean);
}
.button.secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, .65);
  background: rgba(255, 255, 255, .08);
}
.button.light {
  color: var(--ink);
  background: #fff;
}
.button.outline {
  color: var(--ocean);
  border-color: var(--ocean);
  background: #fff;
}
/* 统计块：绝对定位贴 hero 区域右下角，完全避开居中大标题，释放核心视觉空间 */
.hero-stats-bar {
  position: absolute;
  right: 80px; /* 靠右 80px 放置，往左移动以避免太靠浏览器右边缘 */
  bottom: 20px; /* 适当提高至 20px，提升悬浮呼吸感 */
  z-index: 3;
  display: flex;
  justify-content: flex-end; /* 排列在右端 */
  width: auto;
}
/* 统计卡：采用精致微型化包装，背景为扎实不透明深蓝色，投影柔和，低调不抢镜 */
.hero-stats {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: stretch;
  border: 1px solid rgba(255, 255, 255, 0.08); /* 极细微弱边框 */
  background: #0b1f38;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25); /* 柔和弱化投影 */
  border-radius: 4px; /* 小圆角设计 */
}
.hero-stat { 
  padding: 10px 18px; /* 调大内边距，使卡片在大屏下更舒展 */
  border-right: 1px solid rgba(255, 255, 255, .08); 
  text-align: center; 
  white-space: nowrap; 
  color: #fff; 
}
.hero-stat:last-child { border-right: 0; }
.hero-stat strong { 
  display: block; 
  font-size: 22px; /* 字体加大至 22px，突出数据大数字的视觉冲击力 */
  font-weight: 700; 
  color: #fff; 
  white-space: nowrap; 
  line-height: 1.25; 
}
.hero-stat span { 
  color: rgba(255,255,255,.65); 
  font-size: 13px; /* 字体加大至 13px，保证清晰可见 */
  white-space: nowrap; 
}

.theme-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
/* 卡片高度缩小到 300px；背景图裁掉上半，露出下方主体（船/建筑） */
/* 卡片高度 260px；底色用主题色淡化（color-mix），图右下显示；用 ::after 渐变蒙层让图边缘自然过渡到底色 */
.theme-card { position: relative; min-height: 190px; overflow: hidden; color: #0d1a2c; background-position: right bottom; background-size: auto 114%; background-repeat: no-repeat; background-color: color-mix(in srgb, var(--theme-color, #2d6cdf) 15%, #ffffff); }
/* radial 蒙层：以图主体（右下 85%/85%）为中心，由内向外用底色"啃食"图的四周边缘，实现整图四向虚化融合 */
.theme-card::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(circle at 85% 85%, transparent 25%, color-mix(in srgb, var(--theme-color, #2d6cdf) 15%, #ffffff) 75%); }
/* 默认深色文字 + 白色光晕阴影；下方 p / meta 单独换成主题色提升对比 */
.theme-card-content { display: flex; flex-direction: column; align-items: center; position: absolute; right: 0; bottom: 0; left: 0; z-index: 1; padding: 28px 40% 28px 0; text-shadow: 0 1px 2px rgba(255, 255, 255, .9), 0 2px 8px rgba(255, 255, 255, .75), 0 0 18px rgba(255, 255, 255, .6); }
.theme-card .theme-no { font-family: Georgia, serif; font-size: 14px; font-weight: 700; color: var(--theme-color, #2d6cdf); }
.theme-card h3 { margin: 8px 0 3px; font-family: STSong, SimSun, serif; font-size: 34px; font-weight: 800; color: var(--theme-color, #2d6cdf); }
/* p / meta 改为白字 + 多层黑色阴影，自带描边效果，不受背景影响 */
.theme-card-content p { margin: 0 0 17px; color: #fff; font-weight: 600; text-shadow: 0 1px 2px rgba(0, 0, 0, .95), 0 2px 8px rgba(0, 0, 0, .8), 0 0 14px rgba(0, 0, 0, .6); }
.theme-card-content .theme-card-meta { display: flex; gap: 18px; font-size: 13px; font-weight: 700; color: #fff; text-shadow: 0 1px 2px rgba(0, 0, 0, .95), 0 2px 8px rgba(0, 0, 0, .8), 0 0 14px rgba(0, 0, 0, .6); }
.theme-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

/* ────── 业态导航条 ─────
   左侧标题 + 右侧 9 chip 同一行；chip 整体填充主题色，之间留间隙。
*/
/*.sector-bar-wrap { display: flex; align-items: center; gap: 24px; background: #fff; border-bottom: 1px solid var(--line); padding: 22px max(20px, calc((100vw - 1180px) / 2)); }*/
/* 业态条整体浅色底；shell 内 flex 让 head 和 bar 同行 */
/* 视差滚动层：不透明背景 + 高于固定 hero 的层级，滚动时整体盖住 home-hero */
.home-stack { position: relative; z-index: 1; background: var(--paper); }
.sector-bar-wrap { background: #eef3f8; border-bottom: 1px solid var(--line); padding: 16px 0; }
/* 左侧标题块用 navy 深色填充，跟右侧 chip 形成"标题块 + 色块"的连续视觉条 */
/*.sector-bar-head { flex: 0 0 auto; padding: 12px 18px; background: var(--navy); color: #fff; align-self: stretch; display: flex; flex-direction: column; justify-content: center; }*/
/*.sector-bar-head .eyebrow { margin-bottom: 4px; color: rgba(255, 255, 255, .65); }*/
/*.sector-bar-head h2 { margin: 0; font-size: 20px; line-height: 1.3; color: #fff; white-space: nowrap; }*/
/* chip 用 flex 等分剩余宽度，相互之间留 10px gap */
.sector-bar { display: flex; gap: 10px; flex: 1; min-width: 0; }
.sector-chip { flex: 1 1 0; min-width: 0; display: inline-flex; flex-direction: column; align-items: center; gap: 4px; padding: 14px 10px; background: var(--chip-color, #2d6cdf); color: #fff; text-decoration: none; transition: .18s; overflow: hidden; box-shadow: 0 2px 6px rgba(0, 0, 0, .08); }
.sector-chip:hover { filter: brightness(1.1); transform: translateY(-2px); box-shadow: 0 10px 20px rgba(15, 36, 64, .18); z-index: 1; }
.sector-chip-name { max-width: 100%; font-size: 14px; font-weight: 700; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; letter-spacing: .5px; }
.sector-chip-theme { font-size: 14px; color: rgba(255, 255, 255, .78); white-space: nowrap; }
.sector-chip-stats { display: flex; gap: 8px; margin-top: 4px; padding-top: 6px; border-top: 1px solid rgba(255, 255, 255, .25); font-size: 11px; color: rgba(255, 255, 255, .9); white-space: nowrap; }

/* ────── 四模块大卡片：高度紧凑 + 序号标题同行 + 主题色淡底色 ────── */
.module-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
/* 四模块改为「白底 + 顶部 4px 主题色条」，跟三主题"浅色底+图片"形成视觉对比 */
.module-card { position: relative; display: flex; flex-direction: column; min-height: 150px; padding: 16px 20px 14px; border: 1px solid var(--line); border-top: 4px solid var(--ocean); background: #fff; color: #1f2d3d; text-decoration: none; transition: .2s; overflow: hidden; box-shadow: 0 2px 6px rgba(0, 0, 0, .03); }
.module-card-1 { border-top-color: var(--ocean); }
.module-card-2 { border-top-color: #c0392b; }
.module-card-3 { border-top-color: #00a676; }
.module-card-4 { border-top-color: #f39c12; }
.module-card:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(15, 36, 64, .12); }
/* 序号和标题同一行（baseline 对齐），head 自身加主题色淡底色作"标签条"，内容水平居中 */
/* head 统一用浅灰底（var(--soft)），主题色靠顶部边条体现，不再每张卡 head 用不同色 */
.module-card-head { display: flex; flex-direction: row; align-items: baseline; justify-content: center; flex-wrap: nowrap; gap: 6px; margin: -16px -20px 10px; padding: 12px 20px; background: var(--soft); text-align: center; }
.module-no { color: var(--ocean); font-size: 18px; font-weight: 700; }
.module-card h3 { margin: 0; font-size: 20px; line-height: 1.2; color: var(--ocean); white-space: nowrap; }
.module-sub { margin: 0; color: var(--ocean); font-size: 13px; white-space: nowrap; }
.module-card-2 .module-no, .module-card-2 .module-sub, .module-card-2 h3 { color: #c0392b; }
.module-card-3 .module-no, .module-card-3 .module-sub, .module-card-3 h3 { color: #00a676; }
.module-card-4 .module-no, .module-card-4 .module-sub, .module-card-4 h3 { color: #f39c12; }
.module-card p { flex: 1; margin: 0; color: var(--muted); font-size: 13px; line-height: 1; }
.module-stats { display: flex; gap: 16px; margin-top: 10px; padding-top: 8px; border-top: 1px dashed rgba(0, 0, 0, .12); color: var(--muted); font-size: 12px; }
.module-stats strong { display: inline; color: var(--ink); font-size: 15px; font-weight: 700; margin-right: 3px; }

/* ────── 课程思政志愿库 5 卡片 ────── */
.spirit-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.spirit-card { display: flex; flex-direction: column; padding: 24px 20px; border: 1px solid var(--line); background: linear-gradient(160deg, #ffffff 0%, #f6f9fd 100%); transition: .2s; }
.spirit-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: transparent; }
.spirit-no { display: inline-block; padding: 3px 8px; border: 1px solid var(--ocean); border-radius: 999px; color: var(--ocean); font-size: 11px; align-self: flex-start; }
.spirit-card-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 8px; }
.spirit-card h3 { margin: 0; font-size: 19px; }
.spirit-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }

/* ────── 响应式：业态条/四模块/志愿库小屏折叠 ────── */
@media (max-width: 960px) {
  .sector-bar { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .sector-chip { flex: 0 0 auto; }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .spirit-grid { grid-template-columns: repeat(2, 1fr); }
  .dropdown-menu-sectors { grid-template-columns: repeat(2, 1fr); min-width: 320px; }
}
@media (max-width: 600px) {
  .module-grid, .spirit-grid { grid-template-columns: 1fr; }
}

.principles { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.principle { min-height: 180px; padding: 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principle .number { color: var(--ocean); font-family: Georgia, serif; font-size: 13px; }
.principle h3 { margin: 30px 0 8px; font-size: 20px; }
.principle p { margin: 0; color: var(--muted); font-size: 14px; }
.course-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.course-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  text-decoration: none;
  color: var(--ink);
  box-shadow: 0 2px 8px rgba(25, 45, 75, 0.02);
}
.course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(25, 45, 75, 0.08);
  border-color: color-mix(in srgb, var(--theme-color, var(--ocean)) 30%, var(--line));
}
.course-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #eef2f6;
  flex-shrink: 0;
}
.course-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 58%;
  transition: transform 0.4s ease;
}
.course-card:hover .course-cover img {
  transform: scale(1.05);
}
.course-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.1) 0%, transparent 40%);
}
.course-badge {
  position: absolute;
  z-index: 3;
  top: 10px;
  left: 10px;
  padding: 3px 8px;
  color: #fff;
  border: 1px solid rgba(255,255,255,.3);
  background: rgba(10,31,53,.6);
  font-size: 11px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.course-hours {
  position: absolute;
  z-index: 3;
  top: 10px;
  right: 10px;
  padding: 3px 8px;
  color: #fff;
  background: rgba(10,31,53,.65);
  border-radius: 4px;
  font-size: 11px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  font-weight: 500;
}
.course-body {
  position: relative;
  z-index: 2;
  flex: 1;
  padding: 16px 16px 0px 16px;
  display: flex;
  flex-direction: column;
  background: #ffffff;
  color: var(--ink);
}
.course-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 6px;
  font-size: 11px;
}
.course-tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 11px;
  line-height: 1.5;
  white-space: nowrap;
}
.course-tag-theme {
  background: color-mix(in srgb, var(--theme-color, var(--ocean)) 10%, white);
  color: var(--theme-color, var(--ocean));
  font-weight: 700;
}
.course-tag-sector {
  background: #f0f4f8;
  color: var(--muted);
  border: 1px solid var(--line);
}
.course-card h3 {
  margin: 4px 0 6px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}
.course-card:hover h3 {
  color: var(--theme-color, var(--ocean));
}
.course-card p {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}
/* 主题页 Hero：高度压缩，精致且富有质感的左右排版 */
/* 主题页 Hero：高对比度的明亮毛玻璃卡片式布局，确保在不同氛围背景图下均清晰易读 */
.page-hero {
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: center;
  /* 移除了原本的全局 text color，改为由子元素各自决定，提升扩展性 */
  background-position: center;
  background-size: cover;
}
/* 微调不同背景图的定位，使其在高度缩小后仍能展示主体 (如船只、地平线等) */
.page-hero.hero-prosperous_shipping {
  background-position: center 70%;
}
.page-hero.hero-solid_maritime_frontier {
  background-position: center 66%;
}
.page-hero.hero-connected_opening {
  background-position: center 65%;
}
.page-hero .shell {
  position: relative;
  z-index: 1;
  padding-top: 22px;
  padding-bottom: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
}
/* 主题介绍信息框：采用白色半透明毛玻璃质感，提供高对比度的背景，保证标题和描述文本的阅读清晰度 */
.page-hero-info {
  flex: 0 1 auto; /* 从 flex: 1 修改为自适应收缩，不再强行占据剩余宽度，使框体只包裹文字部分 */
  min-width: 0;
  max-width: 780px; /* 新增：限制最大宽度，与内部 720px 描述文本排版尺寸相呼应 */
  background: rgba(255, 255, 255, 0.85); /* 85% 不透明白底，保证足够的文字对比度 */
  backdrop-filter: blur(12px);           /* 毛玻璃模糊模糊程度，营造深邃的玻璃质感 */
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.6); /* 精细半透明白色边框，强化高光边缘 */
  padding: 16px 24px;
  border-radius: 12px;                  /* 圆润卡片边角 */
  box-shadow: 0 8px 32px rgba(15, 36, 64, 0.06); /* 柔和的环境光投影 */
}
.page-hero-title-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-top: 4px;
}
/* 面包屑导航链接：适配白底，改用深灰字，并加鼠标悬浮时变为对应主题色的过渡动效 */
.crumb {
  margin-bottom: 4px;
  color: var(--muted, #65748a); /* 采用通用的深灰辅助色 */
  font-size: 12px;
  text-shadow: none; /* 移除原本在深色背景上的抗干扰投影 */
}
.crumb a {
  color: var(--muted, #65748a);
  text-decoration: none;
  transition: color 0.2s ease;
}
.crumb a:hover {
  color: var(--theme-color, #2d6cdf); /* 悬浮时呈显主题色 */
}
/* 英文小标题/副标题：设置合适字重和字距，颜色改用明亮白底下的深灰色 */
.page-hero .eyebrow {
  margin: 0;
  color: var(--muted, #65748a);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .5px;
  text-transform: none;
  text-shadow: none;
}
/* 核心标题：根据用户的反馈，将字色修改为对应的“主题色调”，使得标题在页面中脱颖而出，并展现品牌特征 */
.page-hero h1 {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--theme-color, var(--ocean)); /* 动态使用 body 上传递下来的 --theme-color 变量 */
  text-shadow: none; /* 去除原本为了配合白字而设置的黑色投影 */
}
/* 简短描述性文本：在白底蒙版下，使用高对比度的深色墨水黑字 */
.page-hero p {
  max-width: 720px;
  margin: 6px 0 0;
  color: var(--ink, #16253a); /* 使用通用主字色 */
  font-size: 13px;
  line-height: 1.5;
  text-shadow: none;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
/* 右侧统计信息面板：统一改造成与左侧相称的亮色毛玻璃质感，维持设计的协调与一致性 */
.page-hero-stats {
  display: flex;
  gap: 24px;
  margin-top: 0;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.85); /* 统一为一致的亮色半透明底色 */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  padding: 16px 24px;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(15, 36, 64, 0.06);
}
.page-hero-stats .stat-item {
  text-align: center;
  position: relative;
}
/* 统计项之间的分界竖线：因为亮色底原因，改为低饱和度的深色微弱实线 */
.page-hero-stats .stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: rgba(0, 0, 0, 0.08); /* 改用极淡的暗色竖线 */
}
/* 统计数字：同样改用当前主题颜色突显，配合标题色调，建立强一致的品牌感 */
.page-hero-stats strong {
  display: block;
  font-size: 20px;
  line-height: 1.1;
  font-weight: 750;
  color: var(--theme-color, var(--ocean)); /* 动态读取当前主题色 */
}
/* 统计指标文字说明：使用典雅的深灰辅助色 */
.page-hero-stats span {
  color: var(--muted, #65748a);
  font-size: 11px;
}

/* ═══════════════════ 模块页 Hero（模块主题背景图） ═══════════════════ */
/* 模块页 Hero：高度压缩，采用高对比度的明亮毛玻璃卡片式布局，确保文字在任何背景图下都清晰易读 */
.module-hero {
  position: relative;
  min-height: 258px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--module-hero-color, var(--ocean));
  /* 移除了原本使图片过分刺眼的白色叠加层，保留纯净的背景图色彩 */
  background-image: var(--module-hero-image);
  background-repeat: no-repeat;
  background-size: cover;
  /* 垂直定位用百分比微调：0% 顶部对齐，100% 底部对齐，调大数值往下展示更多 */
  background-position: 50% 36%;
}
.module-hero .shell {
  position: relative;
  z-index: 1;
  padding-top: 22px;
  padding-bottom: 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 16px;
}
/* 模块介绍信息框：采用高清晰度半透明毛玻璃底色，提升与白字的对比度，消除背景干扰 */
.module-hero-info {
  flex: 0 1 auto;
  min-width: 0;
  max-width: 780px;
  background: rgba(255, 255, 255, 0.85); /* 85% 半透明白底，强化文字易读性 */
  backdrop-filter: blur(12px);           /* 磨砂毛玻璃效果 */
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.6); /* 精细半透明白色边框，增加层次感 */
  padding: 16px 24px;
  border-radius: 12px;                  /* 卡片圆角 */
  box-shadow: 0 8px 32px rgba(15, 36, 64, 0.06); /* 微弱的底部阴影 */
}
/* 面包屑导航：在白底蒙版下使用深灰色文字 */
.module-hero .crumb {
  margin-bottom: 4px;
  color: var(--muted, #65748a);
  font-size: 12px;
}
.module-hero .crumb a {
  color: var(--muted, #65748a);
  text-decoration: none;
  transition: color .2s ease;
}
.module-hero .crumb a:hover {
  color: var(--module-color, #2d6cdf); /* 鼠标悬浮时呈现当前模块的主题颜色 */
}
.module-hero-title-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-top: 4px;
}
/* 模块核心标题：动态采用当前模块的代表性主题色，使其从白色卡片上跳脱出来，具有高辨识度 */
.module-hero h1 {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: clamp(24px, 2.6vw, 32px); /* 尺寸优化为更精致的标题大小 */
  font-weight: 800;
  line-height: 1.2;
  color: var(--module-color, var(--ocean)); /* 使用模块的动态代表色 */
  text-shadow: none; /* 去除旧阴影 */
}
/* 括号内的模块属性说明：使用高对比度的深灰色 */
.module-hero .eyebrow {
  margin: 0;
  color: var(--muted, #65748a);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
}
/* 模块描述信息：使用高对比度的墨水黑字，大小精简 */
.module-hero p {
  max-width: 720px;
  margin: 6px 0 0;
  color: var(--ink, #16253a);
  font-size: 13px;
  line-height: 1.5;
}
/* 右侧指标面板：采用与左侧对称的亮色毛玻璃卡片设计，让整体排版具备强烈的秩序美感 */
.module-hero-stats {
  display: flex;
  gap: 24px;
  margin-top: 0;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.85); /* 统一的 85% 半透明白底 */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  padding: 16px 24px;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(15, 36, 64, 0.06);
}
.module-hero-stats .stat-item {
  text-align: center;
  position: relative;
}
/* 分界线：使用暗色系极淡边框以匹配白底 */
.module-hero-stats .stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: rgba(0, 0, 0, 0.08);
}
/* 指标高亮数字：与模块主题色对齐 */
.module-hero-stats strong {
  display: block;
  font-size: 20px;
  line-height: 1.1;
  font-weight: 750;
  color: var(--module-color, var(--ocean)); /* 动态模块代表色 */
}
/* 指标描述说明：使用深灰辅助色 */
.module-hero-stats span {
  color: var(--muted, #65748a);
  font-size: 11px;
}

/* 一体化多维筛选面板 */
.theme-filter-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 24px;
  margin: 20px 0;
  box-shadow: 0 4px 12px rgba(25, 45, 75, 0.02);
}
.filter-row {
  display: flex;
  align-items: center;
  padding: 12px 0;
}
.filter-row:not(:last-child) {
  border-bottom: 1px dashed rgba(220, 227, 235, 0.6);
}
.filter-label {
  flex: 0 0 80px;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
}
.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
  min-width: 0;
}
.filter-options a {
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 500;
  color: #4a5568;
  border-radius: 99px;
  transition: all 0.15s ease;
  background: transparent;
}
.filter-options a:hover {
  color: var(--theme-color, var(--ocean));
  background: color-mix(in srgb, var(--theme-color, var(--ocean)) 8%, white);
}
.filter-options a.on {
  color: #ffffff !important;
  background: var(--theme-color, var(--ocean)) !important;
  font-weight: 600;
}

.search-hero { padding: 56px 0 42px; color: #fff; background: #15365f; }
.search-hero h1 { margin: 0 0 6px; font-size: 36px; }
.search-hero p { margin: 0 0 24px; color: rgba(255,255,255,.7); }
.search-bar { display: grid; grid-template-columns: 1fr 110px; max-width: 760px; }
.search-bar input { min-width: 0; height: 48px; padding: 0 16px; border: 0; outline: none; }
.search-bar button { color: #fff; border: 0; background: var(--ocean); font-weight: 750; }
.catalog-layout { display: grid; grid-template-columns: 240px 1fr; gap: 32px; align-items: start; padding: 42px 0 72px; }
.filter-panel { position: sticky; top: 94px; border-top: 3px solid var(--ocean); background: var(--soft); }
.filter-group { padding: 18px; border-bottom: 1px solid var(--line); }
.filter-group h3 { margin: 0 0 12px; font-size: 14px; }
.filter-option { display: flex; align-items: center; gap: 8px; padding: 6px 0; color: #526177; font-size: 13px; }
.filter-option input { accent-color: var(--ocean); }
.filter-submit { width: 100%; padding: 12px; color: #fff; border: 0; background: var(--ocean); font-weight: 750; }
.results-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.results-head h2 { margin: 0; font-size: 22px; }
.sort-links { display: flex; gap: 4px; }
.sort-links a { padding: 6px 10px; color: var(--muted); font-size: 12px; }
.sort-links a.on { color: var(--ocean); background: #edf4ff; }
.results-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.detail-hero { color: #fff; background: #15365f; }
.detail-hero .shell { padding: 48px 0; }
.detail-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.detail-tag { padding: 5px 9px; border: 1px solid rgba(255,255,255,.32); color: rgba(255,255,255,.82); font-size: 11px; }
.detail-hero h1 { max-width: 880px; margin: 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.25; }
.detail-hero p { max-width: 820px; margin: 15px 0 20px; color: rgba(255,255,255,.72); }
.detail-meta { display: flex; flex-wrap: wrap; gap: 22px; color: rgba(255,255,255,.72); font-size: 13px; }
.detail-meta strong { color: #fff; }
.learning-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 28px; align-items: start; padding: 36px 0 72px; }
.learning-layout > * { min-width: 0; }
.player { position: relative; aspect-ratio: 16 / 9; color: #fff; background: #081b30; overflow: hidden; }
.player video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; background: #06101d; }
.player video::-webkit-media-controls-overlay-play-button { display: none; }
.play-button { position: absolute; inset: 0; display: grid; place-items: center; font-size: 48px; color: rgba(255,255,255,.85); background: rgba(8,27,48,.6); }
.play-button[hidden] { display: none; }
.current-lesson { padding: 12px 16px; color: #dbe8f6; background: #102944; font-size: 13px; }
.content-panel { margin-top: 22px; border: 1px solid var(--line); }
.tab-head { display: flex; overflow-x: auto; border-bottom: 1px solid var(--line); scrollbar-width: none; }
.tab-head::-webkit-scrollbar { display: none; }
.tab-head button { padding: 15px 18px; border: 0; border-bottom: 3px solid transparent; background: #fff; color: var(--muted); font-weight: 700; white-space: nowrap; }
.tab-head button.on { color: var(--ocean); border-color: var(--ocean); }
.tab-panel { padding: 26px; }
.tab-panel h3, .article-content h2 { margin: 0 0 12px; }
.tab-panel h4 { margin: 24px 0 8px; }
.tab-panel p, .tab-panel li { color: #4d5e74; }
.audience-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; padding: 0; list-style: none; }
.audience-list li { padding: 12px; background: var(--soft); }
.certificate-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.certificate-chip { padding: 7px 10px; border: 1px solid #e7c67e; color: #8a6415; background: #fffaf0; font-size: 12px; }
.resource-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 14px; font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif; line-height: 1.5; }
.resource-item { display: grid; grid-template-columns: 44px minmax(0, 1fr) auto; gap: 12px; align-items: center; min-height: 98px; padding: 14px; border: 1px solid var(--line); background: #fff; transition: border-color .18s, box-shadow .18s, transform .18s; }
.resource-item:hover { transform: translateY(-2px); border-color: #abc0d7; box-shadow: 0 10px 24px rgba(25, 45, 75, .08); }
.resource-item.disabled { color: #7d8998; background: #f8fafc; }
.resource-item.disabled:hover { transform: none; border-color: var(--line); box-shadow: none; }
.resource-icon { display: grid; width: 44px; height: 44px; place-items: center; border: 1px solid #d9e6f8; color: var(--ocean); background: #f0f6ff; font-weight: 850; }
.resource-main { min-width: 0; }
.resource-main strong { display: block; color: var(--ink); font-size: 14px; line-height: 1.35; }
.resource-main em { display: -webkit-box; overflow: hidden; margin-top: 4px; color: var(--muted); font-size: 12px; font-style: normal; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.resource-main small { display: block; margin-top: 6px; color: #846118; font-size: 11px; }
.resource-action { justify-self: end; color: var(--ocean); font-size: 12px; font-weight: 800; white-space: nowrap; }
.resource-item.disabled .resource-action { color: #96a2b1; }

/* 教案/课件/实训指导书 tab：左侧按章节的文件列表 + 右侧预览 */
.resource-collection-body { display: grid; grid-template-columns: 260px 1fr; gap: 16px; align-items: stretch; margin-top: 14px; min-height: 600px; }
.resource-file-list { max-height: 800px; overflow: auto; border: 1px solid var(--line); background: #fff; }
.resource-group + .resource-group { border-top: 1px solid #eef1f4; }
.resource-group-title { padding: 10px 14px; background: var(--soft); color: var(--ink); font-weight: 700; font-size: 13px; }
.resource-file { display: block; padding: 10px 14px; border-top: 1px solid #f2f4f7; color: #4d5e74; text-decoration: none; cursor: pointer; }
.resource-file:hover { background: #f5f9ff; color: var(--ocean); }
.resource-file.on { background: #eaf3ff; color: var(--ocean); }
.resource-file-title { display: block; font-size: 13px; line-height: 1.4; }
.resource-file-meta { display: block; margin-top: 3px; color: #8a97a8; font-size: 11px; }
.resource-file.on .resource-file-meta { color: #6a94d4; }
.resource-preview { border: 1px solid var(--line); background: #fff; }
.resource-preview-frame { width: 100%; height: 800px; border: 0; background: #fff; display: block; }
.resource-preview-download { padding: 16px; }
.course-sidebar { position: sticky; top: 94px; border: 1px solid var(--line); background: #fff; }
.sidebar-head { padding: 17px; border-bottom: 1px solid var(--line); }
.sidebar-head strong { display: block; }
.sidebar-head span { color: var(--muted); font-size: 12px; }
.module-block { border-bottom: 1px solid var(--line); }
.module-title { padding: 13px 16px; background: var(--soft); font-weight: 750; font-size: 13px; }
.lesson-item { display: grid; grid-template-columns: 20px 1fr auto; gap: 8px; align-items: center; padding: 11px 15px; color: #526177; border-top: 1px solid #eef1f4; font-size: 12px; cursor: pointer; }
.lesson-item.on { color: var(--ocean); background: #f2f7ff; }
.lesson-index { color: #8a97a8; }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 42px; align-items: start; padding: 48px 0 80px; }
.article-content { color: #33465d; font-family: Georgia, "Noto Serif SC", serif; font-size: 17px; line-height: 1.9; }
.article-content h2 { margin-top: 36px; color: var(--ink); font-size: 28px; }
.article-content h3 { margin-top: 28px; color: var(--ink); }
.article-resources { margin-top: 40px; padding-top: 6px; border-top: 1px solid var(--line); }
.article-aside { position: sticky; top: 96px; }
.aside-block { padding: 20px 0; border-top: 2px solid var(--ink); }
.aside-block h3 { margin: 0 0 12px; font-size: 15px; }
.toc-link { display: block; padding: 8px 0; color: var(--muted); font-size: 13px; }

.certificate-hero, .partner-hero, .about-hero { padding: 64px 0; color: #fff; background: #15365f; }
.certificate-hero h1, .partner-hero h1, .about-hero h1 { margin: 0 0 8px; font-size: 42px; }
.certificate-hero p, .partner-hero p, .about-hero p { max-width: 760px; margin: 0; color: rgba(255,255,255,.72); }
.series-nav { display: flex; gap: 10px; margin-top: 24px; }
.series-nav a { padding: 8px 14px; border: 1px solid rgba(255,255,255,.35); font-size: 12px; }
.certificate-series { padding: 58px 0; border-bottom: 1px solid var(--line); }
.series-title { display: grid; grid-template-columns: 70px 1fr; gap: 18px; align-items: center; margin-bottom: 26px; }
.series-code { display: grid; height: 70px; place-items: center; color: #fff; background: var(--navy); font-family: Georgia, serif; font-size: 32px; }
.series-title h2 { margin: 0; }
.series-title p { margin: 5px 0 0; color: var(--muted); }
.certificate-levels { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.certificate-level { border: 1px solid var(--line); background: #fff; }
.level-head { display: grid; grid-template-columns: 58px 1fr; gap: 15px; align-items: center; padding: 18px; background: var(--soft); }
.level-code { display: grid; height: 50px; place-items: center; color: #fff; background: var(--ocean); font-weight: 800; }
.level-head h3 { margin: 0; }
.level-head p { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.level-courses { padding: 8px 18px 14px; }
.level-course { display: flex; justify-content: space-between; gap: 15px; padding: 10px 0; border-bottom: 1px solid #edf0f4; font-size: 13px; }
.level-course:last-child { border: 0; }
.level-empty { padding: 12px 0; color: var(--muted); font-size: 12px; }

.partner-filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 26px 0; }
.partner-filters a { padding: 8px 13px; border: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.partner-filters a.on { color: #fff; border-color: var(--navy); background: var(--navy); }
.partner-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.partner-card { min-height: 230px; padding: 24px; border: 1px solid var(--line); background: #fff; }
.partner-card:hover { border-color: #aab8c8; box-shadow: var(--shadow); }
.partner-card-top { display: flex; align-items: center; gap: 14px; }
.partner-card h3 { margin: 0; font-size: 18px; }
.partner-card p { margin: 17px 0; color: var(--muted); font-size: 13px; }
.partner-card-stats { display: flex; gap: 18px; padding-top: 15px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.partner-card-stats strong { color: var(--ink); font-size: 17px; }
.partner-profile { display: grid; grid-template-columns: 1.25fr .75fr; gap: 40px; padding: 52px 0; }
.profile-copy h1 { margin: 0 0 10px; font-size: 36px; }
.profile-copy p { color: var(--muted); }
.profile-stats { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.profile-stat { padding: 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.profile-stat strong { display: block; font-size: 24px; }
.profile-stat span { color: var(--muted); font-size: 12px; }

.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: center; }
.about-intro img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.about-copy h2 { margin: 0; font-size: 34px; }
.about-copy p { color: var(--muted); }
.timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.timeline-item { padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.timeline-item strong { color: var(--ocean); }
.timeline-item h3 { margin: 20px 0 8px; }
.timeline-item p { margin: 0; color: var(--muted); font-size: 13px; }

.site-footer { color: rgba(255,255,255,.72); background: #102943; }
.footer-shell { width: min(1180px, calc(100% - 40px)); min-height: 150px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand img { width: 48px; height: 48px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand strong, .footer-brand span { display: block; }
.footer-brand strong { color: #fff; }
.footer-brand span { margin-top: 4px; font-size: 12px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; font-size: 13px; }
.footer-links a:hover { color: #fff; }
.copyright { padding: 14px 20px; text-align: center; border-top: 1px solid rgba(255,255,255,.1); font-size: 11px; }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1020px) {
  .nav-links { position: absolute; top: 72px; right: 0; left: 0; display: none; height: auto; padding: 10px 20px 18px; border-bottom: 1px solid var(--line); background: #fff; }
  .nav-links.open { display: block; }
  .nav-links > a, .nav-dropdown > a { min-height: 44px; padding: 0; }
  .nav-links > a::after, .nav-dropdown > a::after { display: none; }
  .nav-dropdown { display: block; }
  .dropdown-menu { position: static; display: grid; grid-template-columns: repeat(3, 1fr); visibility: visible; opacity: 1; transform: none; border: 0; box-shadow: none; padding: 0 0 8px; }
  .menu-toggle { display: block; }
  .nav-action { margin-left: 0; }
  /* 移除了此处的旧 padding 规则，统一在方案 C 媒体查询中配置 */
  .theme-grid, .course-grid, .results-grid, .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .principles { grid-template-columns: repeat(2, 1fr); }
  .catalog-layout { grid-template-columns: 210px 1fr; }
  .learning-layout { grid-template-columns: 1fr; }
  .course-sidebar { position: static; }
  .resource-grid { grid-template-columns: 1fr; }
  .resource-collection-body { grid-template-columns: 1fr; min-height: 0; }
  .resource-file-list { max-height: 320px; }
  .resource-preview-frame { height: 600px; }
}

@media (max-width: 720px) {
  .shell { width: min(100% - 28px, 1180px); }
  .section { padding: 52px 0; }
  .brand { min-width: 0; }
  .brand-copy small { display: none; }
  /* 移除了此处的旧 hero / hero-content 规则，统一在方案 C 媒体查询中配置 */
  .hero-stats { position: absolute; right: 14px; bottom: 22px; left: 14px; grid-template-columns: repeat(2, 1fr); width: auto; margin: 0; }
  .hero-stat { min-width: 0; padding: 11px 14px; }
  .hero-stat:nth-child(2) { border-right: 0; }
  .hero-stat strong { font-size: 20px; }
  .theme-grid, .course-grid, .results-grid, .partner-grid, .certificate-levels, .partner-list, .timeline { grid-template-columns: 1fr; }
  .theme-card { min-height: 360px; }
  .principles { grid-template-columns: 1fr 1fr; }
  .theme-filter-card { padding: 12px 16px; margin: 12px 0; }
  .filter-row { flex-direction: column; align-items: flex-start; gap: 8px; padding: 10px 0; }
  .filter-label { flex: none; font-size: 12px; margin-bottom: 2px; }
  .filter-options { gap: 6px; }
  .filter-options a { padding: 4px 10px; font-size: 12px; }
  .catalog-layout { grid-template-columns: 1fr; padding-top: 24px; }
  .filter-panel { position: static; }
  .results-head { align-items: start; flex-direction: column; gap: 10px; }
  .article-layout, .partner-profile, .about-intro { grid-template-columns: 1fr; }
  .article-aside { position: static; order: -1; }
  .audience-list { grid-template-columns: 1fr; }
  .resource-item { grid-template-columns: 40px minmax(0, 1fr); min-height: 0; }
  .resource-icon { width: 40px; height: 40px; }
  .resource-action { grid-column: 2; justify-self: start; }
  .page-hero { min-height: auto; }
  .page-hero .shell { flex-direction: column; align-items: stretch; gap: 16px; padding-top: 20px; padding-bottom: 20px; }
  .page-hero-title-row { flex-direction: column; align-items: flex-start; gap: 4px; }
  .page-hero-stats { align-self: flex-start; width: 100%; justify-content: space-around; }
  .module-hero { min-height: auto; }
  .module-hero .shell { flex-direction: column; align-items: stretch; gap: 16px; padding-top: 20px; padding-bottom: 20px; }
  .module-hero-title-row { flex-direction: column; align-items: flex-start; gap: 4px; }
  .module-hero-stats { align-self: flex-start; width: 100%; justify-content: space-around; }
  .footer-shell { align-items: start; flex-direction: column; padding: 34px 0; }
}

/* ─────────────────────────────────────────────────────────
   方案 C：响应式断点（覆盖前面旧 1020/720 段的 hero 规则）
   桌面基准设计在 1440 viewport，下面分段缩放。
   ───────────────────────────────────────────────────────── */

/* ≤1440：小桌面（笔记本默认分辨率）—— 恢复高度 min-height: 170px 与 max-height: 170px，微调字号 */
@media (max-width: 1440px) {
  .home-hero { 
    min-height: 170px; /* 恢复原有的 170px 高度 */
    max-height: 170px; 
    padding-top: 30px; 
  }
  .hero-content h1 { 
    font-size: 36px; /* 笔记本端字号同步调大至 36px */
  }
  /* 将统计栏同样置于右下角，往左侧及上方微调移动以确保美观 */
  .hero-stats-bar { 
    right: 60px; /* 靠右 60px 放置，往左移动 */
    bottom: 16px; 
    left: auto;
    width: auto;
    z-index: 10; 
  }
  .hero-content { padding-left: 24px; } /* 恢复原有的 24px 左边距 */
  .hero-stat {
    padding: 8px 14px; /* 笔记本端微调为较紧凑内边距 */
  }
  .hero-stat strong {
    font-size: 18px; /* 笔记本端大数字放大到 18px */
  }
  .hero-stat span {
    font-size: 12px; /* 笔记本端说明文字放大到 12px */
  }
  .sector-bar-head h2 { font-size: 20px; }
  .sector-bar { gap: 8px; }
  .sector-chip { padding: 12px 8px; }
  .sector-chip-name { font-size: 13px; }
  .sector-chip-theme { font-size: 10px; }
  .sector-chip-stats { font-size: 10px; }
  .module-card h3 { font-size: 18px; }
  .module-card p { font-size: 12px; }
  .theme-card h3 { font-size: 28px; }
}

/* ≤1024：平板 + 小屏桌面 —— 恢复高度 min-height: 160px 与 max-height: 160px，微调字号 */
@media (max-width: 1024px) {
  .home-hero { 
    min-height: 160px !important; /* 恢复原有的 160px 高度 */
    max-height: 160px !important; 
    padding-top: 24px; 
    padding-bottom: 0 !important; 
    background-position: center; 
  }
  .hero-content { 
    padding-left: 16px !important; /* 恢复原有的 16px 左边距 */
    padding-bottom: 0 !important; 
    padding-top: 0 !important; 
  }
  .hero-content h1 { 
    font-size: 28px !important; /* 平板及小屏桌面端字号同步调大至 28px */
    white-space: normal; 
    line-height: 1.35; 
  }
  /* 解决遮挡与碰撞：平板端及小屏宽度受限，且容器高度较矮（160px），在此隐藏统计栏以确保标题文字有足够宽度展示而无任何遮挡 */
  .hero-stats-bar { 
    display: none; 
  }
  /* 9 chip 在小屏折叠成多行 */
  .sector-bar-wrap { flex-wrap: wrap; padding: 16px 20px; gap: 12px; }
  .sector-bar { flex-wrap: wrap; gap: 8px; width: 100%; }
  .sector-chip { flex: 1 1 calc(33.33% - 8px); }
  .theme-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .spirit-grid { grid-template-columns: repeat(3, 1fr); }
  .theme-card { min-height: 260px !important; }
}

/* ≤768：手机 —— 恢复高度 min-height: 140px 与 max-height: 140px，微调字号 */
@media (max-width: 768px) {
  .home-hero { 
    min-height: 140px !important; /* 恢复原有的 140px 高度 */
    max-height: 140px !important; 
    padding-top: 16px; 
  }
  .hero-content h1 { 
    font-size: 24px !important; /* 手机端字号同步调大至 24px */
  }
  .hero-stats-bar { display: none; }  /* 手机隐藏 stats 浮层，避免遮挡 */
  
  /* 手机端重置首页左右分栏结构为垂直排列，防止内容受限，并将标题卡片改为通栏横排居中 */
  .shell.shell-flex { flex-direction: column; align-items: stretch; gap: 16px; }
  .shell.shell-flex > .section-head { 
    flex: 0 0 auto; 
    width: 100%; 
    align-items: center; 
    padding: 12px 16px; 
  }
  .shell-flex > .section-head h2 { 
    width: auto; /* 手机端恢复宽度自适应 */
    white-space: nowrap; 
  }
  .shell-flex > .section-head h2 br { 
    display: none; /* 手机端隐藏 HTML 换行符，使标题文字恢复单行呈现 */
  }
  
  .sector-bar-head { width: 100%; text-align: center; padding: 12px; }
  .sector-bar-head h2 { font-size: 18px; }
  .sector-chip { flex: 1 1 calc(50% - 8px); padding: 10px 6px; }
  .theme-grid { grid-template-columns: 1fr !important; }
  .module-grid { grid-template-columns: 1fr; }
  .spirit-grid { grid-template-columns: repeat(2, 1fr); }
  .theme-card { min-height: 220px !important; }
}

/* ─────────────────────────────────────────────────────────
   .section-split：标题脱出 shell，贴 viewport 左边；右侧内容区受 shell 右边距约束
   ───────────────────────────────────────────────────────── */
.section-split {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  /* 右侧留出与 shell 一致的边距（让 grid 不贴 viewport 右边） */
  /*padding: 24px max(20px, calc((100vw - 1180px) / 2)) 24px 0;*/
}
.section-split .section-head {
  flex: 0 0 220px;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 18px 22px;
  background: var(--navy);
  color: #fff;
  align-self: stretch;
}
.section-split .section-head .eyebrow { margin: 0; color: rgba(255, 255, 255, .65); }
.section-split .section-head h2 { margin: 0; font-size: 20px; color: #fff; }
.section-split .section-head .text-link { color: #9dd1ff; margin-top: auto; }
/* section-body 在右侧 flex 空间内水平居中（max-width 限宽 + 内部 margin auto 居中） */
.section-split .section-body { flex: 1; min-width: 0; display: flex; }
.section-split .section-body > * { width: 100%; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}